diff options
Diffstat (limited to 'libcxx')
124 files changed, 13816 insertions, 3625 deletions
diff --git a/libcxx/CREDITS.TXT b/libcxx/CREDITS.TXT index fc442f4db1a1..cd5bc08a60fc 100644 --- a/libcxx/CREDITS.TXT +++ b/libcxx/CREDITS.TXT @@ -12,6 +12,9 @@ N: Saleem Abdulrasool E: compnerd@compnerd.org D: Minor patches and Linux fixes. +N: Ulf Adams +D: Invented the Ryu and Ryu Printf algorithms used in floating-point to_chars, and wrote the initial code. + N: Muiez Ahmed E: muiez@ibm.com D: z/OS port. @@ -28,6 +31,9 @@ N: Holger Arnold E: holgerar@gmail.com D: Minor fix. +N: Jorg Brown +D: Ported floating-point to_chars from MSVC to libc++. + N: David Chisnall E: theraven at theravensnest dot org D: FreeBSD and Solaris ports, libcxxrt support, some atomics work. @@ -81,6 +87,14 @@ N: Argyrios Kyrtzidis E: kyrtzidis@apple.com D: Bug fixes. +N: Stephan T. Lavavej +E: stl@microsoft.com +E: stl@nuwen.net +D: Implemented floating-point to_chars. + +N: Microsoft Corporation +D: Contributed floating-point to_chars. + N: Bruce Mitchener, Jr. E: bruce.mitchener@gmail.com D: Emscripten-related changes. @@ -152,6 +166,7 @@ D: Minor bug fix. N: Mark de Wever E: koraq at xs4all dot nl D: Format library support. +D: Finalized the porting of MSVC's to_chars to libc++. N: Zhang Xiongpang E: zhangxiongpang@gmail.com diff --git a/libcxx/include/__availability b/libcxx/include/__availability index 87d43ed414bf..4652a6fd91b4 100644 --- a/libcxx/include/__availability +++ b/libcxx/include/__availability @@ -129,6 +129,10 @@ // This controls the availability of std::to_chars. # define _LIBCPP_AVAILABILITY_TO_CHARS + // This controls the availability of floating-point std::to_chars functions. + // These overloads were added later than the integer overloads. +# define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT + // This controls the availability of the C++20 synchronization library, // which requires shared library support for various operations // (see libcxx/src/atomic.cpp). @@ -222,6 +226,9 @@ # define _LIBCPP_AVAILABILITY_TO_CHARS \ _LIBCPP_AVAILABILITY_FILESYSTEM +# define _LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT \ + __attribute__((unavailable)) + # define _LIBCPP_AVAILABILITY_SYNC \ __attribute__((availability(macosx,strict,introduced=11.0))) \ __attribute__((availability(ios,strict,introduced=14.0))) \ diff --git a/libcxx/include/__compare/strong_order.h b/libcxx/include/__compare/strong_order.h index e49b2d45de45..42f060387d59 100644 --- a/libcxx/include/__compare/strong_order.h +++ b/libcxx/include/__compare/strong_order.h @@ -86,11 +86,11 @@ namespace __strong_order { bool __u_is_nan = _VSTD::isnan(__u); bool __t_is_negative = _VSTD::signbit(__t); bool __u_is_negative = _VSTD::signbit(__u); - using _IntType = std::conditional_t< - sizeof(__t) == sizeof(int32_t), int32_t, std::conditional_t< + using _IntType = conditional_t< + sizeof(__t) == sizeof(int32_t), int32_t, conditional_t< sizeof(__t) == sizeof(int64_t), int64_t, void> >; - if constexpr (std::is_same_v<_IntType, void>) { + if constexpr (is_same_v<_IntType, void>) { static_assert(sizeof(_Dp) == 0, "std::strong_order is unimplemented for this floating-point type"); } else if (__t_is_nan && __u_is_nan) { // Order by sign bit, then by "payload bits" (we'll just use bit_cast). diff --git a/libcxx/include/__compare/weak_order.h b/libcxx/include/__compare/weak_order.h index f67416ed3ebe..ce914b232108 100644 --- a/libcxx/include/__compare/weak_order.h +++ b/libcxx/include/__compare/weak_order.h @@ -42,13 +42,13 @@ namespace __weak_order { _LIBCPP_HIDE_FROM_ABI static constexpr weak_ordering __go(_Tp&& __t, _Up&& __u, __priority_tag<2>) noexcept { - std::partial_ordering __po = (__t <=> __u); - if (__po == std::partial_ordering::less) { - return std::weak_ordering::less; - } else if (__po == std::partial_ordering::equivalent) { - return std::weak_ordering::equivalent; - } else if (__po == std::partial_ordering::greater) { - return std::weak_ordering::greater; + partial_ordering __po = (__t <=> __u); + if (__po == partial_ordering::less) { + return weak_ordering::less; + } else if (__po == partial_ordering::equivalent) { + return weak_ordering::equivalent; + } else if (__po == partial_ordering::greater) { + return weak_ordering::greater; } else { // Otherwise, at least one of them is a NaN. bool __t_is_nan = _VSTD::isnan(__t); diff --git a/libcxx/include/__config b/libcxx/include/__config index da03e877f753..720e12eac0dd 100644 --- a/libcxx/include/__config +++ b/libcxx/include/__config @@ -333,18 +333,43 @@ # define _LIBCPP_SHORT_WCHAR 1 #endif +// Libc++ supports various implementations of std::random_device. +// +// _LIBCPP_USING_DEV_RANDOM +// Read entropy from the given file, by default `/dev/urandom`. +// If a token is provided, it is assumed to be the path to a file +// to read entropy from. This is the default behavior if nothing +// else is specified. This implementation requires storing state +// inside `std::random_device`. +// +// _LIBCPP_USING_ARC4_RANDOM +// Use arc4random(). This allows obtaining random data even when +// using sandboxing mechanisms. On some platforms like Apple, this +// is the recommended source of entropy for user-space programs. +// When this option is used, the token passed to `std::random_device`'s +// constructor *must* be "/dev/urandom" -- anything else is an error. +// +// _LIBCPP_USING_GETENTROPY +// Use getentropy(). +// When this option is used, the token passed to `std::random_device`'s +// constructor *must* be "/dev/urandom" -- anything else is an error. +// +// _LIBCPP_USING_NACL_RANDOM +// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, +// including accesses to the special files under `/dev`. This implementation +// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. +// When this option is used, the token passed to `std::random_device`'s +// constructor *must* be "/dev/urandom" -- anything else is an error. +// +// _LIBCPP_USING_WIN32_RANDOM +// Use rand_s(), for use on Windows. +// When this option is used, the token passed to `std::random_device`'s +// constructor *must* be "/dev/urandom" -- anything else is an error. #if defined(__OpenBSD__) - // Certain architectures provide arc4random(). Prefer using - // arc4random() over /dev/{u,}random to make it possible to obtain - // random data even when using sandboxing mechanisms such as chroots, - // Capsicum, etc. # define _LIBCPP_USING_ARC4_RANDOM #elif defined(__Fuchsia__) || defined(__wasi__) # define _LIBCPP_USING_GETENTROPY #elif defined(__native_client__) - // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, - // including accesses to the special files under /dev. C++11's - // std::random_device is instead exposed through a NaCl syscall. # define _LIBCPP_USING_NACL_RANDOM #elif defined(_LIBCPP_WIN32API) # define _LIBCPP_USING_WIN32_RANDOM @@ -837,12 +862,6 @@ typedef unsigned int char32_t; #define _LIBCPP_HAS_NO_RANGES #endif -#ifdef _LIBCPP_CXX03_LANG -# define _LIBCPP_DEFAULT {} -#else -# define _LIBCPP_DEFAULT = default; -#endif - #ifdef __GNUC__ # define _LIBCPP_NOALIAS __attribute__((__malloc__)) #else diff --git a/libcxx/include/__debug b/libcxx/include/__debug index e25039c088c6..42f6cef4c07f 100644 --- a/libcxx/include/__debug +++ b/libcxx/include/__debug @@ -34,7 +34,7 @@ # define _LIBCPP_DEBUG_ASSERT(x, m) ((void)0) # define _LIBCPP_ASSERT_IMPL(x, m) ((x) ? (void)0 : _VSTD::__libcpp_debug_function(_VSTD::__libcpp_debug_info(__FILE__, __LINE__, #x, m))) #elif _LIBCPP_DEBUG_LEVEL == 2 -# define _LIBCPP_DEBUG_ASSERT(x, m) _LIBCPP_ASSERT(x, m) +# define _LIBCPP_DEBUG_ASSERT(x, m) _LIBCPP_ASSERT(__libcpp_is_constant_evaluated() || (x), m) # define _LIBCPP_ASSERT_IMPL(x, m) ((x) ? (void)0 : _VSTD::__libcpp_debug_function(_VSTD::__libcpp_debug_info(__FILE__, __LINE__, #x, m))) #else # error _LIBCPP_DEBUG_LEVEL must be one of 0, 1, 2 diff --git a/libcxx/include/__filesystem/copy_options.h b/libcxx/include/__filesystem/copy_options.h new file mode 100644 index 000000000000..c0140d45717b --- /dev/null +++ b/libcxx/include/__filesystem/copy_options.h @@ -0,0 +1,80 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_COPY_OPTIONS_H +#define _LIBCPP___FILESYSTEM_COPY_OPTIONS_H + +#include <__availability> +#include <__config> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +enum class _LIBCPP_ENUM_VIS copy_options : unsigned short { + none = 0, + skip_existing = 1, + overwrite_existing = 2, + update_existing = 4, + recursive = 8, + copy_symlinks = 16, + skip_symlinks = 32, + directories_only = 64, + create_symlinks = 128, + create_hard_links = 256, + __in_recursive_copy = 512, +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator&(copy_options _LHS, copy_options _RHS) { + return static_cast<copy_options>(static_cast<unsigned short>(_LHS) & + static_cast<unsigned short>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator|(copy_options _LHS, copy_options _RHS) { + return static_cast<copy_options>(static_cast<unsigned short>(_LHS) | + static_cast<unsigned short>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator^(copy_options _LHS, copy_options _RHS) { + return static_cast<copy_options>(static_cast<unsigned short>(_LHS) ^ + static_cast<unsigned short>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator~(copy_options _LHS) { + return static_cast<copy_options>(~static_cast<unsigned short>(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline copy_options& operator&=(copy_options& _LHS, copy_options _RHS) { + return _LHS = _LHS & _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline copy_options& operator|=(copy_options& _LHS, copy_options _RHS) { + return _LHS = _LHS | _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline copy_options& operator^=(copy_options& _LHS, copy_options _RHS) { + return _LHS = _LHS ^ _RHS; +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_COPY_OPTIONS_H diff --git a/libcxx/include/__filesystem/directory_entry.h b/libcxx/include/__filesystem/directory_entry.h new file mode 100644 index 000000000000..9efe19465428 --- /dev/null +++ b/libcxx/include/__filesystem/directory_entry.h @@ -0,0 +1,504 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_DIRECTORY_ENTRY_H +#define _LIBCPP___FILESYSTEM_DIRECTORY_ENTRY_H + +#include <__availability> +#include <__config> +#include <__filesystem/path.h> +#include <__filesystem/file_time_type.h> +#include <__filesystem/filesystem_error.h> +#include <__filesystem/file_status.h> +#include <__filesystem/file_type.h> +#include <__filesystem/operations.h> +#include <__filesystem/perms.h> +#include <__errc> +#include <chrono> +#include <cstdint> +#include <cstdlib> +#include <system_error> + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + + +class directory_entry { + typedef _VSTD_FS::path _Path; + +public: + // constructors and destructors + directory_entry() noexcept = default; + directory_entry(directory_entry const&) = default; + directory_entry(directory_entry&&) noexcept = default; + + _LIBCPP_INLINE_VISIBILITY + explicit directory_entry(_Path const& __p) : __p_(__p) { + error_code __ec; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + directory_entry(_Path const& __p, error_code& __ec) : __p_(__p) { + __refresh(&__ec); + } + + ~directory_entry() {} + + directory_entry& operator=(directory_entry const&) = default; + directory_entry& operator=(directory_entry&&) noexcept = default; + + _LIBCPP_INLINE_VISIBILITY + void assign(_Path const& __p) { + __p_ = __p; + error_code __ec; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void assign(_Path const& __p, error_code& __ec) { + __p_ = __p; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void replace_filename(_Path const& __p) { + __p_.replace_filename(__p); + error_code __ec; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void replace_filename(_Path const& __p, error_code& __ec) { + __p_ = __p_.parent_path() / __p; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void refresh() { __refresh(); } + + _LIBCPP_INLINE_VISIBILITY + void refresh(error_code& __ec) noexcept { __refresh(&__ec); } + + _LIBCPP_INLINE_VISIBILITY + _Path const& path() const noexcept { return __p_; } + + _LIBCPP_INLINE_VISIBILITY + operator const _Path&() const noexcept { return __p_; } + + _LIBCPP_INLINE_VISIBILITY + bool exists() const { return _VSTD_FS::exists(file_status{__get_ft()}); } + + _LIBCPP_INLINE_VISIBILITY + bool exists(error_code& __ec) const noexcept { + return _VSTD_FS::exists(file_status{__get_ft(&__ec)}); + } + + _LIBCPP_INLINE_VISIBILITY + bool is_block_file() const { return __get_ft() == file_type::block; } + + _LIBCPP_INLINE_VISIBILITY + bool is_block_file(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::block; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_character_file() const { return __get_ft() == file_type::character; } + + _LIBCPP_INLINE_VISIBILITY + bool is_character_file(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::character; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_directory() const { return __get_ft() == file_type::directory; } + + _LIBCPP_INLINE_VISIBILITY + bool is_directory(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::directory; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_fifo() const { return __get_ft() == file_type::fifo; } + + _LIBCPP_INLINE_VISIBILITY + bool is_fifo(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::fifo; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_other() const { return _VSTD_FS::is_other(file_status{__get_ft()}); } + + _LIBCPP_INLINE_VISIBILITY + bool is_other(error_code& __ec) const noexcept { + return _VSTD_FS::is_other(file_status{__get_ft(&__ec)}); + } + + _LIBCPP_INLINE_VISIBILITY + bool is_regular_file() const { return __get_ft() == file_type::regular; } + + _LIBCPP_INLINE_VISIBILITY + bool is_regular_file(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::regular; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_socket() const { return __get_ft() == file_type::socket; } + + _LIBCPP_INLINE_VISIBILITY + bool is_socket(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::socket; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_symlink() const { return __get_sym_ft() == file_type::symlink; } + + _LIBCPP_INLINE_VISIBILITY + bool is_symlink(error_code& __ec) const noexcept { + return __get_sym_ft(&__ec) == file_type::symlink; + } + _LIBCPP_INLINE_VISIBILITY + uintmax_t file_size() const { return __get_size(); } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t file_size(error_code& __ec) const noexcept { + return __get_size(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t hard_link_count() const { return __get_nlink(); } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t hard_link_count(error_code& __ec) const noexcept { + return __get_nlink(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_time_type last_write_time() const { return __get_write_time(); } + + _LIBCPP_INLINE_VISIBILITY + file_time_type last_write_time(error_code& __ec) const noexcept { + return __get_write_time(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_status status() const { return __get_status(); } + + _LIBCPP_INLINE_VISIBILITY + file_status status(error_code& __ec) const noexcept { + return __get_status(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_status symlink_status() const { return __get_symlink_status(); } + + _LIBCPP_INLINE_VISIBILITY + file_status symlink_status(error_code& __ec) const noexcept { + return __get_symlink_status(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + bool operator<(directory_entry const& __rhs) const noexcept { + return __p_ < __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator==(directory_entry const& __rhs) const noexcept { + return __p_ == __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator!=(directory_entry const& __rhs) const noexcept { + return __p_ != __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator<=(directory_entry const& __rhs) const noexcept { + return __p_ <= __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator>(directory_entry const& __rhs) const noexcept { + return __p_ > __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator>=(directory_entry const& __rhs) const noexcept { + return __p_ >= __rhs.__p_; + } + +private: + friend class directory_iterator; + friend class recursive_directory_iterator; + friend class __dir_stream; + + enum _CacheType : unsigned char { + _Empty, + _IterSymlink, + _IterNonSymlink, + _RefreshSymlink, + _RefreshSymlinkUnresolved, + _RefreshNonSymlink + }; + + struct __cached_data { + uintmax_t __size_; + uintmax_t __nlink_; + file_time_type __write_time_; + perms __sym_perms_; + perms __non_sym_perms_; + file_type __type_; + _CacheType __cache_type_; + + _LIBCPP_INLINE_VISIBILITY + __cached_data() noexcept { __reset(); } + + _LIBCPP_INLINE_VISIBILITY + void __reset() { + __cache_type_ = _Empty; + __type_ = file_type::none; + __sym_perms_ = __non_sym_perms_ = perms::unknown; + __size_ = __nlink_ = uintmax_t(-1); + __write_time_ = file_time_type::min(); + } + }; + + _LIBCPP_INLINE_VISIBILITY + static __cached_data __create_iter_result(file_type __ft) { + __cached_data __data; + __data.__type_ = __ft; + __data.__cache_type_ = [&]() { + switch (__ft) { + case file_type::none: + return _Empty; + case file_type::symlink: + return _IterSymlink; + default: + return _IterNonSymlink; + } + }(); + return __data; + } + + _LIBCPP_INLINE_VISIBILITY + void __assign_iter_entry(_Path&& __p, __cached_data __dt) { + __p_ = _VSTD::move(__p); + __data_ = __dt; + } + + _LIBCPP_FUNC_VIS + error_code __do_refresh() noexcept; + + _LIBCPP_INLINE_VISIBILITY + static bool __is_dne_error(error_code const& __ec) { + if (!__ec) + return true; + switch (static_cast<errc>(__ec.value())) { + case errc::no_such_file_or_directory: + case errc::not_a_directory: + return true; + default: + return false; + } + } + + _LIBCPP_INLINE_VISIBILITY + void __handle_error(const char* __msg, error_code* __dest_ec, + error_code const& __ec, bool __allow_dne = false) const { + if (__dest_ec) { + *__dest_ec = __ec; + return; + } + if (__ec && (!__allow_dne || !__is_dne_error(__ec))) + __throw_filesystem_error(__msg, __p_, __ec); + } + + _LIBCPP_INLINE_VISIBILITY + void __refresh(error_code* __ec = nullptr) { + __handle_error("in directory_entry::refresh", __ec, __do_refresh(), + /*allow_dne*/ true); + } + + _LIBCPP_INLINE_VISIBILITY + file_type __get_sym_ft(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + return __symlink_status(__p_, __ec).type(); + case _IterSymlink: + case _RefreshSymlink: + case _RefreshSymlinkUnresolved: + if (__ec) + __ec->clear(); + return file_type::symlink; + case _IterNonSymlink: + case _RefreshNonSymlink: + file_status __st(__data_.__type_); + if (__ec && !_VSTD_FS::exists(__st)) + *__ec = make_error_code(errc::no_such_file_or_directory); + else if (__ec) + __ec->clear(); + return __data_.__type_; + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_type __get_ft(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return __status(__p_, __ec).type(); + case _IterNonSymlink: + case _RefreshNonSymlink: + case _RefreshSymlink: { + file_status __st(__data_.__type_); + if (__ec && !_VSTD_FS::exists(__st)) + *__ec = make_error_code(errc::no_such_file_or_directory); + else if (__ec) + __ec->clear(); + return __data_.__type_; + } + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_status __get_status(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return __status(__p_, __ec); + case _RefreshNonSymlink: + case _RefreshSymlink: + return file_status(__get_ft(__ec), __data_.__non_sym_perms_); + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_status __get_symlink_status(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + return __symlink_status(__p_, __ec); + case _RefreshNonSymlink: + return file_status(__get_sym_ft(__ec), __data_.__non_sym_perms_); + case _RefreshSymlink: + case _RefreshSymlinkUnresolved: + return file_status(__get_sym_ft(__ec), __data_.__sym_perms_); + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t __get_size(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return _VSTD_FS::__file_size(__p_, __ec); + case _RefreshSymlink: + case _RefreshNonSymlink: { + error_code __m_ec; + file_status __st(__get_ft(&__m_ec)); + __handle_error("in directory_entry::file_size", __ec, __m_ec); + if (_VSTD_FS::exists(__st) && !_VSTD_FS::is_regular_file(__st)) { + errc __err_kind = _VSTD_FS::is_directory(__st) ? errc::is_a_directory + : errc::not_supported; + __handle_error("in directory_entry::file_size", __ec, + make_error_code(__err_kind)); + } + return __data_.__size_; + } + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t __get_nlink(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return _VSTD_FS::__hard_link_count(__p_, __ec); + case _RefreshSymlink: + case _RefreshNonSymlink: { + error_code __m_ec; + (void)__get_ft(&__m_ec); + __handle_error("in directory_entry::hard_link_count", __ec, __m_ec); + return __data_.__nlink_; + } + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_time_type __get_write_time(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return _VSTD_FS::__last_write_time(__p_, __ec); + case _RefreshSymlink: + case _RefreshNonSymlink: { + error_code __m_ec; + file_status __st(__get_ft(&__m_ec)); + __handle_error("in directory_entry::last_write_time", __ec, __m_ec); + if (_VSTD_FS::exists(__st) && + __data_.__write_time_ == file_time_type::min()) + __handle_error("in directory_entry::last_write_time", __ec, + make_error_code(errc::value_too_large)); + return __data_.__write_time_; + } + } + _LIBCPP_UNREACHABLE(); + } + +private: + _Path __p_; + __cached_data __data_; +}; + +class __dir_element_proxy { +public: + inline _LIBCPP_INLINE_VISIBILITY directory_entry operator*() { + return _VSTD::move(__elem_); + } + +private: + friend class directory_iterator; + friend class recursive_directory_iterator; + explicit __dir_element_proxy(directory_entry const& __e) : __elem_(__e) {} + __dir_element_proxy(__dir_element_proxy&& __o) + : __elem_(_VSTD::move(__o.__elem_)) {} + directory_entry __elem_; +}; + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___FILESYSTEM_DIRECTORY_ENTRY_H diff --git a/libcxx/include/__filesystem/directory_iterator.h b/libcxx/include/__filesystem/directory_iterator.h new file mode 100644 index 000000000000..be958e0eb8de --- /dev/null +++ b/libcxx/include/__filesystem/directory_iterator.h @@ -0,0 +1,150 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H +#define _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H + +#include <__availability> +#include <__config> +#include <__filesystem/directory_entry.h> +#include <__filesystem/directory_options.h> +#include <__filesystem/path.h> +#include <__iterator/iterator_traits.h> +#include <__memory/shared_ptr.h> +#include <__debug> +#include <__ranges/enable_borrowed_range.h> +#include <__ranges/enable_view.h> +#include <cstddef> +#include <system_error> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +class _LIBCPP_HIDDEN __dir_stream; +class directory_iterator { +public: + typedef directory_entry value_type; + typedef ptrdiff_t difference_type; + typedef value_type const* pointer; + typedef value_type const& reference; + typedef input_iterator_tag iterator_category; + +public: + //ctor & dtor + directory_iterator() noexcept {} + + explicit directory_iterator(const path& __p) + : directory_iterator(__p, nullptr) {} + + directory_iterator(const path& __p, directory_options __opts) + : directory_iterator(__p, nullptr, __opts) {} + + directory_iterator(const path& __p, error_code& __ec) + : directory_iterator(__p, &__ec) {} + + directory_iterator(const path& __p, directory_options __opts, + error_code& __ec) + : directory_iterator(__p, &__ec, __opts) {} + + directory_iterator(const directory_iterator&) = default; + directory_iterator(directory_iterator&&) = default; + directory_iterator& operator=(const directory_iterator&) = default; + + directory_iterator& operator=(directory_iterator&& __o) noexcept { + // non-default implementation provided to support self-move assign. + if (this != &__o) { + __imp_ = _VSTD::move(__o.__imp_); + } + return *this; + } + + ~directory_iterator() = default; + + const directory_entry& operator*() const { + _LIBCPP_ASSERT(__imp_, "The end iterator cannot be dereferenced"); + return __dereference(); + } + + const directory_entry* operator->() const { return &**this; } + + directory_iterator& operator++() { return __increment(); } + + __dir_element_proxy operator++(int) { + __dir_element_proxy __p(**this); + __increment(); + return __p; + } + + directory_iterator& increment(error_code& __ec) { return __increment(&__ec); } + +private: + inline _LIBCPP_INLINE_VISIBILITY friend bool + operator==(const directory_iterator& __lhs, + const directory_iterator& __rhs) noexcept; + + // construct the dir_stream + _LIBCPP_FUNC_VIS + directory_iterator(const path&, error_code*, + directory_options = directory_options::none); + + _LIBCPP_FUNC_VIS + directory_iterator& __increment(error_code* __ec = nullptr); + + _LIBCPP_FUNC_VIS + const directory_entry& __dereference() const; + +private: + shared_ptr<__dir_stream> __imp_; +}; + +inline _LIBCPP_INLINE_VISIBILITY bool +operator==(const directory_iterator& __lhs, + const directory_iterator& __rhs) noexcept { + return __lhs.__imp_ == __rhs.__imp_; +} + +inline _LIBCPP_INLINE_VISIBILITY bool +operator!=(const directory_iterator& __lhs, + const directory_iterator& __rhs) noexcept { + return !(__lhs == __rhs); +} + +// enable directory_iterator range-based for statements +inline _LIBCPP_INLINE_VISIBILITY directory_iterator +begin(directory_iterator __iter) noexcept { + return __iter; +} + +inline _LIBCPP_INLINE_VISIBILITY directory_iterator +end(directory_iterator) noexcept { + return directory_iterator(); +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#if !defined(_LIBCPP_HAS_NO_RANGES) + +template <> +_LIBCPP_AVAILABILITY_FILESYSTEM +inline constexpr bool _VSTD::ranges::enable_borrowed_range<_VSTD_FS::directory_iterator> = true; + +template <> +_LIBCPP_AVAILABILITY_FILESYSTEM +inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::directory_iterator> = true; + +#endif + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H diff --git a/libcxx/include/__filesystem/directory_options.h b/libcxx/include/__filesystem/directory_options.h new file mode 100644 index 000000000000..79c0c2cbaa55 --- /dev/null +++ b/libcxx/include/__filesystem/directory_options.h @@ -0,0 +1,78 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_DIRECTORY_OPTIONS_H +#define _LIBCPP___FILESYSTEM_DIRECTORY_OPTIONS_H + +#include <__availability> +#include <__config> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +enum class _LIBCPP_ENUM_VIS directory_options : unsigned char { + none = 0, + follow_directory_symlink = 1, + skip_permission_denied = 2 +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator&(directory_options _LHS, + directory_options _RHS) { + return static_cast<directory_options>(static_cast<unsigned char>(_LHS) & + static_cast<unsigned char>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator|(directory_options _LHS, + directory_options _RHS) { + return static_cast<directory_options>(static_cast<unsigned char>(_LHS) | + static_cast<unsigned char>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator^(directory_options _LHS, + directory_options _RHS) { + return static_cast<directory_options>(static_cast<unsigned char>(_LHS) ^ + static_cast<unsigned char>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator~(directory_options _LHS) { + return static_cast<directory_options>(~static_cast<unsigned char>(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline directory_options& operator&=(directory_options& _LHS, + directory_options _RHS) { + return _LHS = _LHS & _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline directory_options& operator|=(directory_options& _LHS, + directory_options _RHS) { + return _LHS = _LHS | _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline directory_options& operator^=(directory_options& _LHS, + directory_options _RHS) { + return _LHS = _LHS ^ _RHS; +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_DIRECTORY_OPTIONS_H diff --git a/libcxx/include/__filesystem/file_status.h b/libcxx/include/__filesystem/file_status.h new file mode 100644 index 000000000000..a8f653ab44fc --- /dev/null +++ b/libcxx/include/__filesystem/file_status.h @@ -0,0 +1,68 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_FILE_STATUS_H +#define _LIBCPP___FILESYSTEM_FILE_STATUS_H + +#include <__availability> +#include <__config> +#include <__filesystem/file_type.h> +#include <__filesystem/perms.h> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +class _LIBCPP_TYPE_VIS file_status { +public: + // constructors + _LIBCPP_INLINE_VISIBILITY + file_status() noexcept : file_status(file_type::none) {} + _LIBCPP_INLINE_VISIBILITY + explicit file_status(file_type __ft, perms __prms = perms::unknown) noexcept + : __ft_(__ft), + __prms_(__prms) {} + + file_status(const file_status&) noexcept = default; + file_status(file_status&&) noexcept = default; + + _LIBCPP_INLINE_VISIBILITY + ~file_status() {} + + file_status& operator=(const file_status&) noexcept = default; + file_status& operator=(file_status&&) noexcept = default; + + // observers + _LIBCPP_INLINE_VISIBILITY + file_type type() const noexcept { return __ft_; } + + _LIBCPP_INLINE_VISIBILITY + perms permissions() const noexcept { return __prms_; } + + // modifiers + _LIBCPP_INLINE_VISIBILITY + void type(file_type __ft) noexcept { __ft_ = __ft; } + + _LIBCPP_INLINE_VISIBILITY + void permissions(perms __p) noexcept { __prms_ = __p; } + +private: + file_type __ft_; + perms __prms_; +}; + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_FILE_STATUS_H diff --git a/libcxx/include/__filesystem/file_time_type.h b/libcxx/include/__filesystem/file_time_type.h new file mode 100644 index 000000000000..590146a06600 --- /dev/null +++ b/libcxx/include/__filesystem/file_time_type.h @@ -0,0 +1,27 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_FILE_TIME_TYPE_H +#define _LIBCPP___FILESYSTEM_FILE_TIME_TYPE_H + +#include <__availability> +#include <__config> +#include <chrono> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +typedef chrono::time_point<_FilesystemClock> file_time_type; + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_FILE_TIME_TYPE_H diff --git a/libcxx/include/__filesystem/file_type.h b/libcxx/include/__filesystem/file_type.h new file mode 100644 index 000000000000..93bee86ad635 --- /dev/null +++ b/libcxx/include/__filesystem/file_type.h @@ -0,0 +1,39 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_FILE_TYPE_H +#define _LIBCPP___FILESYSTEM_FILE_TYPE_H + +#include <__availability> +#include <__config> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +// On Windows, the library never identifies files as block, character, fifo +// or socket. +enum class _LIBCPP_ENUM_VIS file_type : signed char { + none = 0, + not_found = -1, + regular = 1, + directory = 2, + symlink = 3, + block = 4, + character = 5, + fifo = 6, + socket = 7, + unknown = 8 +}; + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_FILE_TYPE_H diff --git a/libcxx/include/__filesystem/filesystem_error.h b/libcxx/include/__filesystem/filesystem_error.h new file mode 100644 index 000000000000..a8c6977b48e9 --- /dev/null +++ b/libcxx/include/__filesystem/filesystem_error.h @@ -0,0 +1,99 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H +#define _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H + +#include <__availability> +#include <__config> +#include <__filesystem/path.h> +#include <__memory/shared_ptr.h> +#include <system_error> +#include <iosfwd> +#include <new> +#include <type_traits> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +class _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error { +public: + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, error_code __ec) + : system_error(__ec, __what), + __storage_(make_shared<_Storage>(path(), path())) { + __create_what(0); + } + + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, const path& __p1, error_code __ec) + : system_error(__ec, __what), + __storage_(make_shared<_Storage>(__p1, path())) { + __create_what(1); + } + + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, const path& __p1, const path& __p2, + error_code __ec) + : system_error(__ec, __what), + __storage_(make_shared<_Storage>(__p1, __p2)) { + __create_what(2); + } + + _LIBCPP_INLINE_VISIBILITY + const path& path1() const noexcept { return __storage_->__p1_; } + + _LIBCPP_INLINE_VISIBILITY + const path& path2() const noexcept { return __storage_->__p2_; } + + filesystem_error(const filesystem_error&) = default; + ~filesystem_error() override; // key function + + _LIBCPP_INLINE_VISIBILITY + const char* what() const noexcept override { + return __storage_->__what_.c_str(); + } + + void __create_what(int __num_paths); + +private: + struct _LIBCPP_HIDDEN _Storage { + _LIBCPP_INLINE_VISIBILITY + _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {} + + path __p1_; + path __p2_; + string __what_; + }; + shared_ptr<_Storage> __storage_; +}; + +// TODO(ldionne): We need to pop the pragma and push it again after +// filesystem_error to work around PR41078. +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +template <class... _Args> +_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY +#ifndef _LIBCPP_NO_EXCEPTIONS +void __throw_filesystem_error(_Args&&... __args) { + throw filesystem_error(_VSTD::forward<_Args>(__args)...); +} +#else +void __throw_filesystem_error(_Args&&...) { + _VSTD::abort(); +} +#endif +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_FILESYSTEM_ERROR_H diff --git a/libcxx/include/__filesystem/operations.h b/libcxx/include/__filesystem/operations.h new file mode 100644 index 000000000000..19d6c2d437f9 --- /dev/null +++ b/libcxx/include/__filesystem/operations.h @@ -0,0 +1,599 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_OPERATIONS_H +#define _LIBCPP___FILESYSTEM_OPERATIONS_H + +#include <__availability> +#include <__config> +#include <__filesystem/copy_options.h> +#include <__filesystem/file_status.h> +#include <__filesystem/file_time_type.h> +#include <__filesystem/file_type.h> +#include <__filesystem/path.h> +#include <__filesystem/perm_options.h> +#include <__filesystem/perms.h> +#include <__filesystem/space_info.h> +#include <chrono> +#include <cstdint> +#include <system_error> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +_LIBCPP_FUNC_VIS +path __absolute(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __canonical(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __copy_file(const path& __from, const path& __to, copy_options __opt, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __copy_symlink(const path& __existing_symlink, const path& __new_symlink, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __copy(const path& __from, const path& __to, copy_options __opt, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __create_directories(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __create_directory_symlink(const path& __to, const path& __new_symlink, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __create_directory(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +bool __create_directory(const path& p, const path& attributes, + error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __create_hard_link(const path& __to, const path& __new_hard_link, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __create_symlink(const path& __to, const path& __new_symlink, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __current_path(error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __current_path(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __equivalent(const path&, const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +file_status __status(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +uintmax_t __file_size(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +uintmax_t __hard_link_count(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +file_status __symlink_status(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +file_time_type __last_write_time(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __last_write_time(const path& p, file_time_type new_time, + error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +path __weakly_canonical(path const& __p, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __read_symlink(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +uintmax_t __remove_all(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +bool __remove(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __rename(const path& from, const path& to, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __resize_file(const path& p, uintmax_t size, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +path __temp_directory_path(error_code* __ec = nullptr); + +inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p) { + return __absolute(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p, + error_code& __ec) { + return __absolute(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p) { + return __canonical(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p, + error_code& __ec) { + return __canonical(__p, &__ec); +} + + +inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from, + const path& __to) { + return __copy_file(__from, __to, copy_options::none); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +copy_file(const path& __from, const path& __to, error_code& __ec) { + return __copy_file(__from, __to, copy_options::none, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +copy_file(const path& __from, const path& __to, copy_options __opt) { + return __copy_file(__from, __to, __opt); +} + +inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from, + const path& __to, + copy_options __opt, + error_code& __ec) { + return __copy_file(__from, __to, __opt, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy_symlink(const path& __existing, + const path& __new) { + __copy_symlink(__existing, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +copy_symlink(const path& __ext, const path& __new, error_code& __ec) noexcept { + __copy_symlink(__ext, __new, &__ec); +} + + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, + const path& __to) { + __copy(__from, __to, copy_options::none); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, + error_code& __ec) { + __copy(__from, __to, copy_options::none, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, + copy_options __opt) { + __copy(__from, __to, __opt); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, + copy_options __opt, + error_code& __ec) { + __copy(__from, __to, __opt, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p) { + return __create_directories(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p, + error_code& __ec) { + return __create_directories(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_directory_symlink(const path& __to, const path& __new) { + __create_directory_symlink(__to, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_directory_symlink(const path& __to, const path& __new, + error_code& __ec) noexcept { + __create_directory_symlink(__to, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p) { + return __create_directory(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +create_directory(const path& __p, error_code& __ec) noexcept { + return __create_directory(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p, + const path& __attrs) { + return __create_directory(__p, __attrs); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +create_directory(const path& __p, const path& __attrs, + error_code& __ec) noexcept { + return __create_directory(__p, __attrs, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void create_hard_link(const path& __to, + const path& __new) { + __create_hard_link(__to, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_hard_link(const path& __to, const path& __new, + error_code& __ec) noexcept { + __create_hard_link(__to, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void create_symlink(const path& __to, + const path& __new) { + __create_symlink(__to, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_symlink(const path& __to, const path& __new, error_code& __ec) noexcept { + return __create_symlink(__to, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path current_path() { + return __current_path(); +} + +inline _LIBCPP_INLINE_VISIBILITY path current_path(error_code& __ec) { + return __current_path(&__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p) { + __current_path(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p, + error_code& __ec) noexcept { + __current_path(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool equivalent(const path& __p1, + const path& __p2) { + return __equivalent(__p1, __p2); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +equivalent(const path& __p1, const path& __p2, error_code& __ec) noexcept { + return __equivalent(__p1, __p2, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool status_known(file_status __s) noexcept { + return __s.type() != file_type::none; +} + +inline _LIBCPP_INLINE_VISIBILITY bool exists(file_status __s) noexcept { + return status_known(__s) && __s.type() != file_type::not_found; +} + +inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p) { + return exists(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p, + error_code& __ec) noexcept { + auto __s = __status(__p, &__ec); + if (status_known(__s)) + __ec.clear(); + return exists(__s); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t file_size(const path& __p) { + return __file_size(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t +file_size(const path& __p, error_code& __ec) noexcept { + return __file_size(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t hard_link_count(const path& __p) { + return __hard_link_count(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t +hard_link_count(const path& __p, error_code& __ec) noexcept { + return __hard_link_count(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(file_status __s) noexcept { + return __s.type() == file_type::block; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p) { + return is_block_file(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p, + error_code& __ec) noexcept { + return is_block_file(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_character_file(file_status __s) noexcept { + return __s.type() == file_type::character; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_character_file(const path& __p) { + return is_character_file(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_character_file(const path& __p, error_code& __ec) noexcept { + return is_character_file(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_directory(file_status __s) noexcept { + return __s.type() == file_type::directory; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p) { + return is_directory(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p, + error_code& __ec) noexcept { + return is_directory(__status(__p, &__ec)); +} + +_LIBCPP_FUNC_VIS +bool __fs_is_empty(const path& p, error_code* ec = nullptr); + +inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p) { + return __fs_is_empty(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p, + error_code& __ec) { + return __fs_is_empty(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(file_status __s) noexcept { + return __s.type() == file_type::fifo; +} +inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p) { + return is_fifo(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p, + error_code& __ec) noexcept { + return is_fifo(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_regular_file(file_status __s) noexcept { + return __s.type() == file_type::regular; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_regular_file(const path& __p) { + return is_regular_file(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_regular_file(const path& __p, error_code& __ec) noexcept { + return is_regular_file(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(file_status __s) noexcept { + return __s.type() == file_type::symlink; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p) { + return is_symlink(__symlink_status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p, + error_code& __ec) noexcept { + return is_symlink(__symlink_status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_other(file_status __s) noexcept { + return exists(__s) && !is_regular_file(__s) && !is_directory(__s) && + !is_symlink(__s); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p) { + return is_other(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p, + error_code& __ec) noexcept { + return is_other(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_socket(file_status __s) noexcept { + return __s.type() == file_type::socket; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p) { + return is_socket(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p, + error_code& __ec) noexcept { + return is_socket(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY file_time_type +last_write_time(const path& __p) { + return __last_write_time(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY file_time_type +last_write_time(const path& __p, error_code& __ec) noexcept { + return __last_write_time(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void last_write_time(const path& __p, + file_time_type __t) { + __last_write_time(__p, __t); +} + +inline _LIBCPP_INLINE_VISIBILITY void +last_write_time(const path& __p, file_time_type __t, + error_code& __ec) noexcept { + __last_write_time(__p, __t, &__ec); +} + +_LIBCPP_FUNC_VIS +void __permissions(const path&, perms, perm_options, error_code* = nullptr); + +inline _LIBCPP_INLINE_VISIBILITY void +permissions(const path& __p, perms __prms, + perm_options __opts = perm_options::replace) { + __permissions(__p, __prms, __opts); +} + +inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms, + error_code& __ec) noexcept { + __permissions(__p, __prms, perm_options::replace, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms, + perm_options __opts, + error_code& __ec) { + __permissions(__p, __prms, __opts, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p, + const path& __base, + error_code& __ec) { + path __tmp = __weakly_canonical(__p, &__ec); + if (__ec) + return {}; + path __tmp_base = __weakly_canonical(__base, &__ec); + if (__ec) + return {}; + return __tmp.lexically_proximate(__tmp_base); +} + +inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p, + error_code& __ec) { + return proximate(__p, current_path(), __ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path +proximate(const path& __p, const path& __base = current_path()) { + return __weakly_canonical(__p).lexically_proximate( + __weakly_canonical(__base)); +} + +inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p) { + return __read_symlink(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p, + error_code& __ec) { + return __read_symlink(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p, + const path& __base, + error_code& __ec) { + path __tmp = __weakly_canonical(__p, &__ec); + if (__ec) + return path(); + path __tmpbase = __weakly_canonical(__base, &__ec); + if (__ec) + return path(); + return __tmp.lexically_relative(__tmpbase); +} + +inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p, + error_code& __ec) { + return relative(__p, current_path(), __ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path +relative(const path& __p, const path& __base = current_path()) { + return __weakly_canonical(__p).lexically_relative(__weakly_canonical(__base)); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p) { + return __remove_all(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p, + error_code& __ec) { + return __remove_all(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p) { + return __remove(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p, + error_code& __ec) noexcept { + return __remove(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void rename(const path& __from, + const path& __to) { + return __rename(__from, __to); +} + +inline _LIBCPP_INLINE_VISIBILITY void +rename(const path& __from, const path& __to, error_code& __ec) noexcept { + return __rename(__from, __to, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void resize_file(const path& __p, + uintmax_t __ns) { + return __resize_file(__p, __ns); +} + +inline _LIBCPP_INLINE_VISIBILITY void +resize_file(const path& __p, uintmax_t __ns, error_code& __ec) noexcept { + return __resize_file(__p, __ns, &__ec); +} + +_LIBCPP_FUNC_VIS +space_info __space(const path&, error_code* __ec = nullptr); + +inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p) { + return __space(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p, + error_code& __ec) noexcept { + return __space(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p) { + return __status(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p, + error_code& __ec) noexcept { + return __status(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status symlink_status(const path& __p) { + return __symlink_status(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status +symlink_status(const path& __p, error_code& __ec) noexcept { + return __symlink_status(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path() { + return __temp_directory_path(); +} + +inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path(error_code& __ec) { + return __temp_directory_path(&__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p) { + return __weakly_canonical(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p, + error_code& __ec) { + return __weakly_canonical(__p, &__ec); +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_OPERATIONS_H diff --git a/libcxx/include/__filesystem/path.h b/libcxx/include/__filesystem/path.h new file mode 100644 index 000000000000..a6d1ee997d91 --- /dev/null +++ b/libcxx/include/__filesystem/path.h @@ -0,0 +1,1018 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_PATH_H +#define _LIBCPP___FILESYSTEM_PATH_H + +#include <__availability> +#include <__config> +#include <string> +#include <type_traits> +#include <__iterator/back_insert_iterator.h> +#include <__iterator/iterator_traits.h> +#include <cstddef> +#include <string_view> + +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) +# include <locale> +# include <iomanip> // for quoted +#endif + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +template <class _Tp> +struct __can_convert_char { + static const bool value = false; +}; +template <class _Tp> +struct __can_convert_char<const _Tp> : public __can_convert_char<_Tp> {}; +template <> +struct __can_convert_char<char> { + static const bool value = true; + using __char_type = char; +}; +template <> +struct __can_convert_char<wchar_t> { + static const bool value = true; + using __char_type = wchar_t; +}; +#ifndef _LIBCPP_HAS_NO_CHAR8_T +template <> +struct __can_convert_char<char8_t> { + static const bool value = true; + using __char_type = char8_t; +}; +#endif +template <> +struct __can_convert_char<char16_t> { + static const bool value = true; + using __char_type = char16_t; +}; +template <> +struct __can_convert_char<char32_t> { + static const bool value = true; + using __char_type = char32_t; +}; + +template <class _ECharT> +typename enable_if<__can_convert_char<_ECharT>::value, bool>::type +__is_separator(_ECharT __e) { +#if defined(_LIBCPP_WIN32API) + return __e == _ECharT('/') || __e == _ECharT('\\'); +#else + return __e == _ECharT('/'); +#endif +} + +#ifndef _LIBCPP_HAS_NO_CHAR8_T +typedef u8string __u8_string; +#else +typedef string __u8_string; +#endif + +struct _NullSentinel {}; + +template <class _Tp> +using _Void = void; + +template <class _Tp, class = void> +struct __is_pathable_string : public false_type {}; + +template <class _ECharT, class _Traits, class _Alloc> +struct __is_pathable_string< + basic_string<_ECharT, _Traits, _Alloc>, + _Void<typename __can_convert_char<_ECharT>::__char_type> > + : public __can_convert_char<_ECharT> { + using _Str = basic_string<_ECharT, _Traits, _Alloc>; + using _Base = __can_convert_char<_ECharT>; + static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); } + static _ECharT const* __range_end(_Str const& __s) { + return __s.data() + __s.length(); + } + static _ECharT __first_or_null(_Str const& __s) { + return __s.empty() ? _ECharT{} : __s[0]; + } +}; + +template <class _ECharT, class _Traits> +struct __is_pathable_string< + basic_string_view<_ECharT, _Traits>, + _Void<typename __can_convert_char<_ECharT>::__char_type> > + : public __can_convert_char<_ECharT> { + using _Str = basic_string_view<_ECharT, _Traits>; + using _Base = __can_convert_char<_ECharT>; + static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); } + static _ECharT const* __range_end(_Str const& __s) { + return __s.data() + __s.length(); + } + static _ECharT __first_or_null(_Str const& __s) { + return __s.empty() ? _ECharT{} : __s[0]; + } +}; + +template <class _Source, class _DS = typename decay<_Source>::type, + class _UnqualPtrType = + typename remove_const<typename remove_pointer<_DS>::type>::type, + bool _IsCharPtr = is_pointer<_DS>::value&& + __can_convert_char<_UnqualPtrType>::value> +struct __is_pathable_char_array : false_type {}; + +template <class _Source, class _ECharT, class _UPtr> +struct __is_pathable_char_array<_Source, _ECharT*, _UPtr, true> + : __can_convert_char<typename remove_const<_ECharT>::type> { + using _Base = __can_convert_char<typename remove_const<_ECharT>::type>; + + static _ECharT const* __range_begin(const _ECharT* __b) { return __b; } + static _ECharT const* __range_end(const _ECharT* __b) { + using _Iter = const _ECharT*; + const _ECharT __sentinel = _ECharT{}; + _Iter __e = __b; + for (; *__e != __sentinel; ++__e) + ; + return __e; + } + + static _ECharT __first_or_null(const _ECharT* __b) { return *__b; } +}; + +template <class _Iter, bool _IsIt = __is_cpp17_input_iterator<_Iter>::value, + class = void> +struct __is_pathable_iter : false_type {}; + +template <class _Iter> +struct __is_pathable_iter< + _Iter, true, + _Void<typename __can_convert_char< + typename iterator_traits<_Iter>::value_type>::__char_type> > + : __can_convert_char<typename iterator_traits<_Iter>::value_type> { + using _ECharT = typename iterator_traits<_Iter>::value_type; + using _Base = __can_convert_char<_ECharT>; + + static _Iter __range_begin(_Iter __b) { return __b; } + static _NullSentinel __range_end(_Iter) { return _NullSentinel{}; } + + static _ECharT __first_or_null(_Iter __b) { return *__b; } +}; + +template <class _Tp, bool _IsStringT = __is_pathable_string<_Tp>::value, + bool _IsCharIterT = __is_pathable_char_array<_Tp>::value, + bool _IsIterT = !_IsCharIterT && __is_pathable_iter<_Tp>::value> +struct __is_pathable : false_type { + static_assert(!_IsStringT && !_IsCharIterT && !_IsIterT, "Must all be false"); +}; + +template <class _Tp> +struct __is_pathable<_Tp, true, false, false> : __is_pathable_string<_Tp> {}; + +template <class _Tp> +struct __is_pathable<_Tp, false, true, false> : __is_pathable_char_array<_Tp> { +}; + +template <class _Tp> +struct __is_pathable<_Tp, false, false, true> : __is_pathable_iter<_Tp> {}; + +#if defined(_LIBCPP_WIN32API) +typedef wstring __path_string; +typedef wchar_t __path_value; +#else +typedef string __path_string; +typedef char __path_value; +#endif + +#if defined(_LIBCPP_WIN32API) +_LIBCPP_FUNC_VIS +size_t __wide_to_char(const wstring&, char*, size_t); +_LIBCPP_FUNC_VIS +size_t __char_to_wide(const string&, wchar_t*, size_t); +#endif + +template <class _ECharT> +struct _PathCVT; + +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) +template <class _ECharT> +struct _PathCVT { + static_assert(__can_convert_char<_ECharT>::value, + "Char type not convertible"); + + typedef __narrow_to_utf8<sizeof(_ECharT) * __CHAR_BIT__> _Narrower; +#if defined(_LIBCPP_WIN32API) + typedef __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__> _Widener; +#endif + + static void __append_range(__path_string& __dest, _ECharT const* __b, + _ECharT const* __e) { +#if defined(_LIBCPP_WIN32API) + string __utf8; + _Narrower()(back_inserter(__utf8), __b, __e); + _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); +#else + _Narrower()(back_inserter(__dest), __b, __e); +#endif + } + + template <class _Iter> + static void __append_range(__path_string& __dest, _Iter __b, _Iter __e) { + static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload"); + if (__b == __e) + return; + basic_string<_ECharT> __tmp(__b, __e); +#if defined(_LIBCPP_WIN32API) + string __utf8; + _Narrower()(back_inserter(__utf8), __tmp.data(), + __tmp.data() + __tmp.length()); + _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); +#else + _Narrower()(back_inserter(__dest), __tmp.data(), + __tmp.data() + __tmp.length()); +#endif + } + + template <class _Iter> + static void __append_range(__path_string& __dest, _Iter __b, _NullSentinel) { + static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload"); + const _ECharT __sentinel = _ECharT{}; + if (*__b == __sentinel) + return; + basic_string<_ECharT> __tmp; + for (; *__b != __sentinel; ++__b) + __tmp.push_back(*__b); +#if defined(_LIBCPP_WIN32API) + string __utf8; + _Narrower()(back_inserter(__utf8), __tmp.data(), + __tmp.data() + __tmp.length()); + _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); +#else + _Narrower()(back_inserter(__dest), __tmp.data(), + __tmp.data() + __tmp.length()); +#endif + } + + template <class _Source> + static void __append_source(__path_string& __dest, _Source const& __s) { + using _Traits = __is_pathable<_Source>; + __append_range(__dest, _Traits::__range_begin(__s), + _Traits::__range_end(__s)); + } +}; +#endif // !_LIBCPP_HAS_NO_LOCALIZATION + +template <> +struct _PathCVT<__path_value> { + + template <class _Iter> + static typename enable_if<__is_exactly_cpp17_input_iterator<_Iter>::value>::type + __append_range(__path_string& __dest, _Iter __b, _Iter __e) { + for (; __b != __e; ++__b) + __dest.push_back(*__b); + } + + template <class _Iter> + static typename enable_if<__is_cpp17_forward_iterator<_Iter>::value>::type + __append_range(__path_string& __dest, _Iter __b, _Iter __e) { + __dest.append(__b, __e); + } + + template <class _Iter> + static void __append_range(__path_string& __dest, _Iter __b, _NullSentinel) { + const char __sentinel = char{}; + for (; *__b != __sentinel; ++__b) + __dest.push_back(*__b); + } + + template <class _Source> + static void __append_source(__path_string& __dest, _Source const& __s) { + using _Traits = __is_pathable<_Source>; + __append_range(__dest, _Traits::__range_begin(__s), + _Traits::__range_end(__s)); + } +}; + +#if defined(_LIBCPP_WIN32API) +template <> +struct _PathCVT<char> { + + static void + __append_string(__path_string& __dest, const basic_string<char> &__str) { + size_t __size = __char_to_wide(__str, nullptr, 0); + size_t __pos = __dest.size(); + __dest.resize(__pos + __size); + __char_to_wide(__str, const_cast<__path_value*>(__dest.data()) + __pos, __size); + } + + template <class _Iter> + static typename enable_if<__is_exactly_cpp17_input_iterator<_Iter>::value>::type + __append_range(__path_string& __dest, _Iter __b, _Iter __e) { + basic_string<char> __tmp(__b, __e); + __append_string(__dest, __tmp); + } + + template <class _Iter> + static typename enable_if<__is_cpp17_forward_iterator<_Iter>::value>::type + __append_range(__path_string& __dest, _Iter __b, _Iter __e) { + basic_string<char> __tmp(__b, __e); + __append_string(__dest, __tmp); + } + + template <class _Iter> + static void __append_range(__path_string& __dest, _Iter __b, _NullSentinel) { + const char __sentinel = char{}; + basic_string<char> __tmp; + for (; *__b != __sentinel; ++__b) + __tmp.push_back(*__b); + __append_string(__dest, __tmp); + } + + template <class _Source> + static void __append_source(__path_string& __dest, _Source const& __s) { + using _Traits = __is_pathable<_Source>; + __append_range(__dest, _Traits::__range_begin(__s), + _Traits::__range_end(__s)); + } +}; + +template <class _ECharT> +struct _PathExport { + typedef __narrow_to_utf8<sizeof(wchar_t) * __CHAR_BIT__> _Narrower; + typedef __widen_from_utf8<sizeof(_ECharT) * __CHAR_BIT__> _Widener; + + template <class _Str> + static void __append(_Str& __dest, const __path_string& __src) { + string __utf8; + _Narrower()(back_inserter(__utf8), __src.data(), __src.data() + __src.size()); + _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); + } +}; + +template <> +struct _PathExport<char> { + template <class _Str> + static void __append(_Str& __dest, const __path_string& __src) { + size_t __size = __wide_to_char(__src, nullptr, 0); + size_t __pos = __dest.size(); + __dest.resize(__size); + __wide_to_char(__src, const_cast<char*>(__dest.data()) + __pos, __size); + } +}; + +template <> +struct _PathExport<wchar_t> { + template <class _Str> + static void __append(_Str& __dest, const __path_string& __src) { + __dest.append(__src.begin(), __src.end()); + } +}; + +template <> +struct _PathExport<char16_t> { + template <class _Str> + static void __append(_Str& __dest, const __path_string& __src) { + __dest.append(__src.begin(), __src.end()); + } +}; + +#ifndef _LIBCPP_HAS_NO_CHAR8_T +template <> +struct _PathExport<char8_t> { + typedef __narrow_to_utf8<sizeof(wchar_t) * __CHAR_BIT__> _Narrower; + + template <class _Str> + static void __append(_Str& __dest, const __path_string& __src) { + _Narrower()(back_inserter(__dest), __src.data(), __src.data() + __src.size()); + } +}; +#endif /* !_LIBCPP_HAS_NO_CHAR8_T */ +#endif /* _LIBCPP_WIN32API */ + +class _LIBCPP_TYPE_VIS path { + template <class _SourceOrIter, class _Tp = path&> + using _EnableIfPathable = + typename enable_if<__is_pathable<_SourceOrIter>::value, _Tp>::type; + + template <class _Tp> + using _SourceChar = typename __is_pathable<_Tp>::__char_type; + + template <class _Tp> + using _SourceCVT = _PathCVT<_SourceChar<_Tp> >; + +public: +#if defined(_LIBCPP_WIN32API) + typedef wchar_t value_type; + static constexpr value_type preferred_separator = L'\\'; +#else + typedef char value_type; + static constexpr value_type preferred_separator = '/'; +#endif + typedef basic_string<value_type> string_type; + typedef basic_string_view<value_type> __string_view; + + enum _LIBCPP_ENUM_VIS format : unsigned char { + auto_format, + native_format, + generic_format + }; + + // constructors and destructor + _LIBCPP_INLINE_VISIBILITY path() noexcept {} + _LIBCPP_INLINE_VISIBILITY path(const path& __p) : __pn_(__p.__pn_) {} + _LIBCPP_INLINE_VISIBILITY path(path&& __p) noexcept + : __pn_(_VSTD::move(__p.__pn_)) {} + + _LIBCPP_INLINE_VISIBILITY + path(string_type&& __s, format = format::auto_format) noexcept + : __pn_(_VSTD::move(__s)) {} + + template <class _Source, class = _EnableIfPathable<_Source, void> > + path(const _Source& __src, format = format::auto_format) { + _SourceCVT<_Source>::__append_source(__pn_, __src); + } + + template <class _InputIt> + path(_InputIt __first, _InputIt __last, format = format::auto_format) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); + } + +/* +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) + // TODO Implement locale conversions. + template <class _Source, class = _EnableIfPathable<_Source, void> > + path(const _Source& __src, const locale& __loc, format = format::auto_format); + template <class _InputIt> + path(_InputIt __first, _InputIt _last, const locale& __loc, + format = format::auto_format); +#endif +*/ + + _LIBCPP_INLINE_VISIBILITY + ~path() = default; + + // assignments + _LIBCPP_INLINE_VISIBILITY + path& operator=(const path& __p) { + __pn_ = __p.__pn_; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator=(path&& __p) noexcept { + __pn_ = _VSTD::move(__p.__pn_); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator=(string_type&& __s) noexcept { + __pn_ = _VSTD::move(__s); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& assign(string_type&& __s) noexcept { + __pn_ = _VSTD::move(__s); + return *this; + } + + template <class _Source> + _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> + operator=(const _Source& __src) { + return this->assign(__src); + } + + template <class _Source> + _EnableIfPathable<_Source> assign(const _Source& __src) { + __pn_.clear(); + _SourceCVT<_Source>::__append_source(__pn_, __src); + return *this; + } + + template <class _InputIt> + path& assign(_InputIt __first, _InputIt __last) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + __pn_.clear(); + _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); + return *this; + } + +public: + // appends +#if defined(_LIBCPP_WIN32API) + path& operator/=(const path& __p) { + auto __p_root_name = __p.__root_name(); + auto __p_root_name_size = __p_root_name.size(); + if (__p.is_absolute() || + (!__p_root_name.empty() && __p_root_name != __string_view(root_name().__pn_))) { + __pn_ = __p.__pn_; + return *this; + } + if (__p.has_root_directory()) { + path __root_name_str = root_name(); + __pn_ = __root_name_str.native(); + __pn_ += __string_view(__p.__pn_).substr(__p_root_name_size); + return *this; + } + if (has_filename() || (!has_root_directory() && is_absolute())) + __pn_ += preferred_separator; + __pn_ += __string_view(__p.__pn_).substr(__p_root_name_size); + return *this; + } + template <class _Source> + _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> + operator/=(const _Source& __src) { + return operator/=(path(__src)); + } + + template <class _Source> + _EnableIfPathable<_Source> append(const _Source& __src) { + return operator/=(path(__src)); + } + + template <class _InputIt> + path& append(_InputIt __first, _InputIt __last) { + return operator/=(path(__first, __last)); + } +#else + path& operator/=(const path& __p) { + if (__p.is_absolute()) { + __pn_ = __p.__pn_; + return *this; + } + if (has_filename()) + __pn_ += preferred_separator; + __pn_ += __p.native(); + return *this; + } + + // FIXME: Use _LIBCPP_DIAGNOSE_WARNING to produce a diagnostic when __src + // is known at compile time to be "/' since the user almost certainly intended + // to append a separator instead of overwriting the path with "/" + template <class _Source> + _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> + operator/=(const _Source& __src) { + return this->append(__src); + } + + template <class _Source> + _EnableIfPathable<_Source> append(const _Source& __src) { + using _Traits = __is_pathable<_Source>; + using _CVT = _PathCVT<_SourceChar<_Source> >; + bool __source_is_absolute = __is_separator(_Traits::__first_or_null(__src)); + if (__source_is_absolute) + __pn_.clear(); + else if (has_filename()) + __pn_ += preferred_separator; + _CVT::__append_source(__pn_, __src); + return *this; + } + + template <class _InputIt> + path& append(_InputIt __first, _InputIt __last) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + static_assert(__can_convert_char<_ItVal>::value, "Must convertible"); + using _CVT = _PathCVT<_ItVal>; + if (__first != __last && __is_separator(*__first)) + __pn_.clear(); + else if (has_filename()) + __pn_ += preferred_separator; + _CVT::__append_range(__pn_, __first, __last); + return *this; + } +#endif + + // concatenation + _LIBCPP_INLINE_VISIBILITY + path& operator+=(const path& __x) { + __pn_ += __x.__pn_; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(const string_type& __x) { + __pn_ += __x; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(__string_view __x) { + __pn_ += __x; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(const value_type* __x) { + __pn_ += __x; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(value_type __x) { + __pn_ += __x; + return *this; + } + + template <class _ECharT> + typename enable_if<__can_convert_char<_ECharT>::value, path&>::type + operator+=(_ECharT __x) { + _PathCVT<_ECharT>::__append_source(__pn_, + basic_string_view<_ECharT>(&__x, 1)); + return *this; + } + + template <class _Source> + _EnableIfPathable<_Source> operator+=(const _Source& __x) { + return this->concat(__x); + } + + template <class _Source> + _EnableIfPathable<_Source> concat(const _Source& __x) { + _SourceCVT<_Source>::__append_source(__pn_, __x); + return *this; + } + + template <class _InputIt> + path& concat(_InputIt __first, _InputIt __last) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); + return *this; + } + + // modifiers + _LIBCPP_INLINE_VISIBILITY + void clear() noexcept { __pn_.clear(); } + + path& make_preferred() { +#if defined(_LIBCPP_WIN32API) + _VSTD::replace(__pn_.begin(), __pn_.end(), L'/', L'\\'); +#endif + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& remove_filename() { + auto __fname = __filename(); + if (!__fname.empty()) + __pn_.erase(__fname.data() - __pn_.data()); + return *this; + } + + path& replace_filename(const path& __replacement) { + remove_filename(); + return (*this /= __replacement); + } + + path& replace_extension(const path& __replacement = path()); + + _LIBCPP_INLINE_VISIBILITY + void swap(path& __rhs) noexcept { __pn_.swap(__rhs.__pn_); } + + // private helper to allow reserving memory in the path + _LIBCPP_INLINE_VISIBILITY + void __reserve(size_t __s) { __pn_.reserve(__s); } + + // native format observers + _LIBCPP_INLINE_VISIBILITY + const string_type& native() const noexcept { return __pn_; } + + _LIBCPP_INLINE_VISIBILITY + const value_type* c_str() const noexcept { return __pn_.c_str(); } + + _LIBCPP_INLINE_VISIBILITY operator string_type() const { return __pn_; } + +#if defined(_LIBCPP_WIN32API) + _LIBCPP_INLINE_VISIBILITY _VSTD::wstring wstring() const { return __pn_; } + + _VSTD::wstring generic_wstring() const { + _VSTD::wstring __s; + __s.resize(__pn_.size()); + _VSTD::replace_copy(__pn_.begin(), __pn_.end(), __s.begin(), '\\', '/'); + return __s; + } + +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) + template <class _ECharT, class _Traits = char_traits<_ECharT>, + class _Allocator = allocator<_ECharT> > + basic_string<_ECharT, _Traits, _Allocator> + string(const _Allocator& __a = _Allocator()) const { + using _Str = basic_string<_ECharT, _Traits, _Allocator>; + _Str __s(__a); + __s.reserve(__pn_.size()); + _PathExport<_ECharT>::__append(__s, __pn_); + return __s; + } + + _LIBCPP_INLINE_VISIBILITY _VSTD::string string() const { + return string<char>(); + } + _LIBCPP_INLINE_VISIBILITY __u8_string u8string() const { + using _CVT = __narrow_to_utf8<sizeof(wchar_t) * __CHAR_BIT__>; + __u8_string __s; + __s.reserve(__pn_.size()); + _CVT()(back_inserter(__s), __pn_.data(), __pn_.data() + __pn_.size()); + return __s; + } + + _LIBCPP_INLINE_VISIBILITY _VSTD::u16string u16string() const { + return string<char16_t>(); + } + _LIBCPP_INLINE_VISIBILITY _VSTD::u32string u32string() const { + return string<char32_t>(); + } + + // generic format observers + template <class _ECharT, class _Traits = char_traits<_ECharT>, + class _Allocator = allocator<_ECharT> > + basic_string<_ECharT, _Traits, _Allocator> + generic_string(const _Allocator& __a = _Allocator()) const { + using _Str = basic_string<_ECharT, _Traits, _Allocator>; + _Str __s = string<_ECharT, _Traits, _Allocator>(__a); + // Note: This (and generic_u8string below) is slightly suboptimal as + // it iterates twice over the string; once to convert it to the right + // character type, and once to replace path delimiters. + _VSTD::replace(__s.begin(), __s.end(), + static_cast<_ECharT>('\\'), static_cast<_ECharT>('/')); + return __s; + } + + _VSTD::string generic_string() const { return generic_string<char>(); } + _VSTD::u16string generic_u16string() const { return generic_string<char16_t>(); } + _VSTD::u32string generic_u32string() const { return generic_string<char32_t>(); } + __u8_string generic_u8string() const { + __u8_string __s = u8string(); + _VSTD::replace(__s.begin(), __s.end(), '\\', '/'); + return __s; + } +#endif /* !_LIBCPP_HAS_NO_LOCALIZATION */ +#else /* _LIBCPP_WIN32API */ + + _LIBCPP_INLINE_VISIBILITY _VSTD::string string() const { return __pn_; } +#ifndef _LIBCPP_HAS_NO_CHAR8_T + _LIBCPP_INLINE_VISIBILITY _VSTD::u8string u8string() const { return _VSTD::u8string(__pn_.begin(), __pn_.end()); } +#else + _LIBCPP_INLINE_VISIBILITY _VSTD::string u8string() const { return __pn_; } +#endif + +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) + template <class _ECharT, class _Traits = char_traits<_ECharT>, + class _Allocator = allocator<_ECharT> > + basic_string<_ECharT, _Traits, _Allocator> + string(const _Allocator& __a = _Allocator()) const { + using _CVT = __widen_from_utf8<sizeof(_ECharT) * __CHAR_BIT__>; + using _Str = basic_string<_ECharT, _Traits, _Allocator>; + _Str __s(__a); + __s.reserve(__pn_.size()); + _CVT()(back_inserter(__s), __pn_.data(), __pn_.data() + __pn_.size()); + return __s; + } + +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS + _LIBCPP_INLINE_VISIBILITY _VSTD::wstring wstring() const { + return string<wchar_t>(); + } +#endif + _LIBCPP_INLINE_VISIBILITY _VSTD::u16string u16string() const { + return string<char16_t>(); + } + _LIBCPP_INLINE_VISIBILITY _VSTD::u32string u32string() const { + return string<char32_t>(); + } +#endif /* !_LIBCPP_HAS_NO_LOCALIZATION */ + + // generic format observers + _VSTD::string generic_string() const { return __pn_; } +#ifndef _LIBCPP_HAS_NO_CHAR8_T + _VSTD::u8string generic_u8string() const { return _VSTD::u8string(__pn_.begin(), __pn_.end()); } +#else + _VSTD::string generic_u8string() const { return __pn_; } +#endif + +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) + template <class _ECharT, class _Traits = char_traits<_ECharT>, + class _Allocator = allocator<_ECharT> > + basic_string<_ECharT, _Traits, _Allocator> + generic_string(const _Allocator& __a = _Allocator()) const { + return string<_ECharT, _Traits, _Allocator>(__a); + } + +#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS + _VSTD::wstring generic_wstring() const { return string<wchar_t>(); } +#endif + _VSTD::u16string generic_u16string() const { return string<char16_t>(); } + _VSTD::u32string generic_u32string() const { return string<char32_t>(); } +#endif /* !_LIBCPP_HAS_NO_LOCALIZATION */ +#endif /* !_LIBCPP_WIN32API */ + +private: + int __compare(__string_view) const; + __string_view __root_name() const; + __string_view __root_directory() const; + __string_view __root_path_raw() const; + __string_view __relative_path() const; + __string_view __parent_path() const; + __string_view __filename() const; + __string_view __stem() const; + __string_view __extension() const; + +public: + // compare + _LIBCPP_INLINE_VISIBILITY int compare(const path& __p) const noexcept { + return __compare(__p.__pn_); + } + _LIBCPP_INLINE_VISIBILITY int compare(const string_type& __s) const { + return __compare(__s); + } + _LIBCPP_INLINE_VISIBILITY int compare(__string_view __s) const { + return __compare(__s); + } + _LIBCPP_INLINE_VISIBILITY int compare(const value_type* __s) const { + return __compare(__s); + } + + // decomposition + _LIBCPP_INLINE_VISIBILITY path root_name() const { + return string_type(__root_name()); + } + _LIBCPP_INLINE_VISIBILITY path root_directory() const { + return string_type(__root_directory()); + } + _LIBCPP_INLINE_VISIBILITY path root_path() const { +#if defined(_LIBCPP_WIN32API) + return string_type(__root_path_raw()); +#else + return root_name().append(string_type(__root_directory())); +#endif + } + _LIBCPP_INLINE_VISIBILITY path relative_path() const { + return string_type(__relative_path()); + } + _LIBCPP_INLINE_VISIBILITY path parent_path() const { + return string_type(__parent_path()); + } + _LIBCPP_INLINE_VISIBILITY path filename() const { + return string_type(__filename()); + } + _LIBCPP_INLINE_VISIBILITY path stem() const { return string_type(__stem()); } + _LIBCPP_INLINE_VISIBILITY path extension() const { + return string_type(__extension()); + } + + // query + _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY bool + empty() const noexcept { + return __pn_.empty(); + } + + _LIBCPP_INLINE_VISIBILITY bool has_root_name() const { + return !__root_name().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_root_directory() const { + return !__root_directory().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_root_path() const { + return !__root_path_raw().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_relative_path() const { + return !__relative_path().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_parent_path() const { + return !__parent_path().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_filename() const { + return !__filename().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_stem() const { return !__stem().empty(); } + _LIBCPP_INLINE_VISIBILITY bool has_extension() const { + return !__extension().empty(); + } + + _LIBCPP_INLINE_VISIBILITY bool is_absolute() const { +#if defined(_LIBCPP_WIN32API) + __string_view __root_name_str = __root_name(); + __string_view __root_dir = __root_directory(); + if (__root_name_str.size() == 2 && __root_name_str[1] == ':') { + // A drive letter with no root directory is relative, e.g. x:example. + return !__root_dir.empty(); + } + // If no root name, it's relative, e.g. \example is relative to the current drive + if (__root_name_str.empty()) + return false; + if (__root_name_str.size() < 3) + return false; + // A server root name, like \\server, is always absolute + if (__root_name_str[0] != '/' && __root_name_str[0] != '\\') + return false; + if (__root_name_str[1] != '/' && __root_name_str[1] != '\\') + return false; + // Seems to be a server root name + return true; +#else + return has_root_directory(); +#endif + } + _LIBCPP_INLINE_VISIBILITY bool is_relative() const { return !is_absolute(); } + + // relative paths + path lexically_normal() const; + path lexically_relative(const path& __base) const; + + _LIBCPP_INLINE_VISIBILITY path lexically_proximate(const path& __base) const { + path __result = this->lexically_relative(__base); + if (__result.native().empty()) + return *this; + return __result; + } + + // iterators + class _LIBCPP_TYPE_VIS iterator; + typedef iterator const_iterator; + + iterator begin() const; + iterator end() const; + +#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) + template <class _CharT, class _Traits> + _LIBCPP_INLINE_VISIBILITY friend + typename enable_if<is_same<_CharT, value_type>::value && + is_same<_Traits, char_traits<value_type> >::value, + basic_ostream<_CharT, _Traits>&>::type + operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { + __os << _VSTD::__quoted(__p.native()); + return __os; + } + + template <class _CharT, class _Traits> + _LIBCPP_INLINE_VISIBILITY friend + typename enable_if<!is_same<_CharT, value_type>::value || + !is_same<_Traits, char_traits<value_type> >::value, + basic_ostream<_CharT, _Traits>&>::type + operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { + __os << _VSTD::__quoted(__p.string<_CharT, _Traits>()); + return __os; + } + + template <class _CharT, class _Traits> + _LIBCPP_INLINE_VISIBILITY friend basic_istream<_CharT, _Traits>& + operator>>(basic_istream<_CharT, _Traits>& __is, path& __p) { + basic_string<_CharT, _Traits> __tmp; + __is >> __quoted(__tmp); + __p = __tmp; + return __is; + } +#endif // !_LIBCPP_HAS_NO_LOCALIZATION + + friend _LIBCPP_INLINE_VISIBILITY bool operator==(const path& __lhs, const path& __rhs) noexcept { + return __lhs.__compare(__rhs.__pn_) == 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator!=(const path& __lhs, const path& __rhs) noexcept { + return __lhs.__compare(__rhs.__pn_) != 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator<(const path& __lhs, const path& __rhs) noexcept { + return __lhs.__compare(__rhs.__pn_) < 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator<=(const path& __lhs, const path& __rhs) noexcept { + return __lhs.__compare(__rhs.__pn_) <= 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator>(const path& __lhs, const path& __rhs) noexcept { + return __lhs.__compare(__rhs.__pn_) > 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator>=(const path& __lhs, const path& __rhs) noexcept { + return __lhs.__compare(__rhs.__pn_) >= 0; + } + + friend _LIBCPP_INLINE_VISIBILITY path operator/(const path& __lhs, + const path& __rhs) { + path __result(__lhs); + __result /= __rhs; + return __result; + } +private: + inline _LIBCPP_INLINE_VISIBILITY path& + __assign_view(__string_view const& __s) noexcept { + __pn_ = string_type(__s); + return *this; + } + string_type __pn_; +}; + +inline _LIBCPP_INLINE_VISIBILITY void swap(path& __lhs, path& __rhs) noexcept { + __lhs.swap(__rhs); +} + +_LIBCPP_FUNC_VIS +size_t hash_value(const path& __p) noexcept; + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_PATH_H diff --git a/libcxx/include/__filesystem/path_iterator.h b/libcxx/include/__filesystem/path_iterator.h new file mode 100644 index 000000000000..62f8dc6fd357 --- /dev/null +++ b/libcxx/include/__filesystem/path_iterator.h @@ -0,0 +1,132 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_PATH_ITERATOR_H +#define _LIBCPP___FILESYSTEM_PATH_ITERATOR_H + +#include <__availability> +#include <__config> +#include <__filesystem/path.h> +#include <__iterator/iterator_traits.h> +#include <__debug> +#include <cstddef> +#include <string> +#include <string_view> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +class _LIBCPP_TYPE_VIS path::iterator { +public: + enum _ParserState : unsigned char { + _Singular, + _BeforeBegin, + _InRootName, + _InRootDir, + _InFilenames, + _InTrailingSep, + _AtEnd + }; + +public: + typedef bidirectional_iterator_tag iterator_category; + + typedef path value_type; + typedef ptrdiff_t difference_type; + typedef const path* pointer; + typedef const path& reference; + + typedef void + __stashing_iterator_tag; // See reverse_iterator and __is_stashing_iterator + +public: + _LIBCPP_INLINE_VISIBILITY + iterator() + : __stashed_elem_(), __path_ptr_(nullptr), __entry_(), + __state_(_Singular) {} + + iterator(const iterator&) = default; + ~iterator() = default; + + iterator& operator=(const iterator&) = default; + + _LIBCPP_INLINE_VISIBILITY + reference operator*() const { return __stashed_elem_; } + + _LIBCPP_INLINE_VISIBILITY + pointer operator->() const { return &__stashed_elem_; } + + _LIBCPP_INLINE_VISIBILITY + iterator& operator++() { + _LIBCPP_ASSERT(__state_ != _Singular, + "attempting to increment a singular iterator"); + _LIBCPP_ASSERT(__state_ != _AtEnd, + "attempting to increment the end iterator"); + return __increment(); + } + + _LIBCPP_INLINE_VISIBILITY + iterator operator++(int) { + iterator __it(*this); + this->operator++(); + return __it; + } + + _LIBCPP_INLINE_VISIBILITY + iterator& operator--() { + _LIBCPP_ASSERT(__state_ != _Singular, + "attempting to decrement a singular iterator"); + _LIBCPP_ASSERT(__entry_.data() != __path_ptr_->native().data(), + "attempting to decrement the begin iterator"); + return __decrement(); + } + + _LIBCPP_INLINE_VISIBILITY + iterator operator--(int) { + iterator __it(*this); + this->operator--(); + return __it; + } + +private: + friend class path; + + inline _LIBCPP_INLINE_VISIBILITY friend bool operator==(const iterator&, + const iterator&); + + iterator& __increment(); + iterator& __decrement(); + + path __stashed_elem_; + const path* __path_ptr_; + path::__string_view __entry_; + _ParserState __state_; +}; + +inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path::iterator& __lhs, + const path::iterator& __rhs) { + return __lhs.__path_ptr_ == __rhs.__path_ptr_ && + __lhs.__entry_.data() == __rhs.__entry_.data(); +} + +inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path::iterator& __lhs, + const path::iterator& __rhs) { + return !(__lhs == __rhs); +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_PATH_ITERATOR_H diff --git a/libcxx/include/__filesystem/perm_options.h b/libcxx/include/__filesystem/perm_options.h new file mode 100644 index 000000000000..62cd8f575650 --- /dev/null +++ b/libcxx/include/__filesystem/perm_options.h @@ -0,0 +1,73 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_PERM_OPTIONS_H +#define _LIBCPP___FILESYSTEM_PERM_OPTIONS_H + +#include <__availability> +#include <__config> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +enum class _LIBCPP_ENUM_VIS perm_options : unsigned char { + replace = 1, + add = 2, + remove = 4, + nofollow = 8 +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator&(perm_options _LHS, perm_options _RHS) { + return static_cast<perm_options>(static_cast<unsigned>(_LHS) & + static_cast<unsigned>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator|(perm_options _LHS, perm_options _RHS) { + return static_cast<perm_options>(static_cast<unsigned>(_LHS) | + static_cast<unsigned>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator^(perm_options _LHS, perm_options _RHS) { + return static_cast<perm_options>(static_cast<unsigned>(_LHS) ^ + static_cast<unsigned>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator~(perm_options _LHS) { + return static_cast<perm_options>(~static_cast<unsigned>(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline perm_options& operator&=(perm_options& _LHS, perm_options _RHS) { + return _LHS = _LHS & _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline perm_options& operator|=(perm_options& _LHS, perm_options _RHS) { + return _LHS = _LHS | _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline perm_options& operator^=(perm_options& _LHS, perm_options _RHS) { + return _LHS = _LHS ^ _RHS; +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_PERM_OPTIONS_H diff --git a/libcxx/include/__filesystem/perms.h b/libcxx/include/__filesystem/perms.h new file mode 100644 index 000000000000..832f8b07e55c --- /dev/null +++ b/libcxx/include/__filesystem/perms.h @@ -0,0 +1,91 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_PERMS_H +#define _LIBCPP___FILESYSTEM_PERMS_H + +#include <__availability> +#include <__config> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +// On Windows, these permission bits map to one single readonly flag per +// file, and the executable bit is always returned as set. When setting +// permissions, as long as the write bit is set for either owner, group or +// others, the readonly flag is cleared. +enum class _LIBCPP_ENUM_VIS perms : unsigned { + none = 0, + + owner_read = 0400, + owner_write = 0200, + owner_exec = 0100, + owner_all = 0700, + + group_read = 040, + group_write = 020, + group_exec = 010, + group_all = 070, + + others_read = 04, + others_write = 02, + others_exec = 01, + others_all = 07, + + all = 0777, + + set_uid = 04000, + set_gid = 02000, + sticky_bit = 01000, + mask = 07777, + unknown = 0xFFFF, +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator&(perms _LHS, perms _RHS) { + return static_cast<perms>(static_cast<unsigned>(_LHS) & + static_cast<unsigned>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator|(perms _LHS, perms _RHS) { + return static_cast<perms>(static_cast<unsigned>(_LHS) | + static_cast<unsigned>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator^(perms _LHS, perms _RHS) { + return static_cast<perms>(static_cast<unsigned>(_LHS) ^ + static_cast<unsigned>(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator~(perms _LHS) { + return static_cast<perms>(~static_cast<unsigned>(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline perms& operator&=(perms& _LHS, perms _RHS) { return _LHS = _LHS & _RHS; } + +_LIBCPP_INLINE_VISIBILITY +inline perms& operator|=(perms& _LHS, perms _RHS) { return _LHS = _LHS | _RHS; } + +_LIBCPP_INLINE_VISIBILITY +inline perms& operator^=(perms& _LHS, perms _RHS) { return _LHS = _LHS ^ _RHS; } + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_PERMS_H diff --git a/libcxx/include/__filesystem/recursive_directory_iterator.h b/libcxx/include/__filesystem/recursive_directory_iterator.h new file mode 100644 index 000000000000..db7e793e8530 --- /dev/null +++ b/libcxx/include/__filesystem/recursive_directory_iterator.h @@ -0,0 +1,181 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H +#define _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H + +#include <__availability> +#include <__config> +#include <__filesystem/directory_entry.h> +#include <__filesystem/directory_options.h> +#include <__filesystem/path.h> +#include <__iterator/iterator_traits.h> +#include <__memory/shared_ptr.h> +#include <__ranges/enable_borrowed_range.h> +#include <__ranges/enable_view.h> +#include <cstddef> +#include <system_error> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +class recursive_directory_iterator { +public: + using value_type = directory_entry; + using difference_type = ptrdiff_t; + using pointer = directory_entry const*; + using reference = directory_entry const&; + using iterator_category = input_iterator_tag; + +public: + // constructors and destructor + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator() noexcept : __rec_(false) {} + + _LIBCPP_INLINE_VISIBILITY + explicit recursive_directory_iterator( + const path& __p, directory_options __xoptions = directory_options::none) + : recursive_directory_iterator(__p, __xoptions, nullptr) {} + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator(const path& __p, directory_options __xoptions, + error_code& __ec) + : recursive_directory_iterator(__p, __xoptions, &__ec) {} + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator(const path& __p, error_code& __ec) + : recursive_directory_iterator(__p, directory_options::none, &__ec) {} + + recursive_directory_iterator(const recursive_directory_iterator&) = default; + recursive_directory_iterator(recursive_directory_iterator&&) = default; + + recursive_directory_iterator& + operator=(const recursive_directory_iterator&) = default; + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator& + operator=(recursive_directory_iterator&& __o) noexcept { + // non-default implementation provided to support self-move assign. + if (this != &__o) { + __imp_ = _VSTD::move(__o.__imp_); + __rec_ = __o.__rec_; + } + return *this; + } + + ~recursive_directory_iterator() = default; + + _LIBCPP_INLINE_VISIBILITY + const directory_entry& operator*() const { return __dereference(); } + + _LIBCPP_INLINE_VISIBILITY + const directory_entry* operator->() const { return &__dereference(); } + + recursive_directory_iterator& operator++() { return __increment(); } + + _LIBCPP_INLINE_VISIBILITY + __dir_element_proxy operator++(int) { + __dir_element_proxy __p(**this); + __increment(); + return __p; + } + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator& increment(error_code& __ec) { + return __increment(&__ec); + } + + _LIBCPP_FUNC_VIS directory_options options() const; + _LIBCPP_FUNC_VIS int depth() const; + + _LIBCPP_INLINE_VISIBILITY + void pop() { __pop(); } + + _LIBCPP_INLINE_VISIBILITY + void pop(error_code& __ec) { __pop(&__ec); } + + _LIBCPP_INLINE_VISIBILITY + bool recursion_pending() const { return __rec_; } + + _LIBCPP_INLINE_VISIBILITY + void disable_recursion_pending() { __rec_ = false; } + +private: + _LIBCPP_FUNC_VIS + recursive_directory_iterator(const path& __p, directory_options __opt, + error_code* __ec); + + _LIBCPP_FUNC_VIS + const directory_entry& __dereference() const; + + _LIBCPP_FUNC_VIS + bool __try_recursion(error_code* __ec); + + _LIBCPP_FUNC_VIS + void __advance(error_code* __ec = nullptr); + + _LIBCPP_FUNC_VIS + recursive_directory_iterator& __increment(error_code* __ec = nullptr); + + _LIBCPP_FUNC_VIS + void __pop(error_code* __ec = nullptr); + + inline _LIBCPP_INLINE_VISIBILITY friend bool + operator==(const recursive_directory_iterator&, + const recursive_directory_iterator&) noexcept; + + struct _LIBCPP_HIDDEN __shared_imp; + shared_ptr<__shared_imp> __imp_; + bool __rec_; +}; // class recursive_directory_iterator + +inline _LIBCPP_INLINE_VISIBILITY bool +operator==(const recursive_directory_iterator& __lhs, + const recursive_directory_iterator& __rhs) noexcept { + return __lhs.__imp_ == __rhs.__imp_; +} + +_LIBCPP_INLINE_VISIBILITY +inline bool operator!=(const recursive_directory_iterator& __lhs, + const recursive_directory_iterator& __rhs) noexcept { + return !(__lhs == __rhs); +} +// enable recursive_directory_iterator range-based for statements +inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator +begin(recursive_directory_iterator __iter) noexcept { + return __iter; +} + +inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator +end(recursive_directory_iterator) noexcept { + return recursive_directory_iterator(); +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#if !defined(_LIBCPP_HAS_NO_RANGES) + +template <> +_LIBCPP_AVAILABILITY_FILESYSTEM +inline constexpr bool _VSTD::ranges::enable_borrowed_range<_VSTD_FS::recursive_directory_iterator> = true; + +template <> +_LIBCPP_AVAILABILITY_FILESYSTEM +inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::recursive_directory_iterator> = true; + +#endif + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H diff --git a/libcxx/include/__filesystem/space_info.h b/libcxx/include/__filesystem/space_info.h new file mode 100644 index 000000000000..098f085678e4 --- /dev/null +++ b/libcxx/include/__filesystem/space_info.h @@ -0,0 +1,35 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_SPACE_INFO_H +#define _LIBCPP___FILESYSTEM_SPACE_INFO_H + +#include <__availability> +#include <__config> +#include <cstdint> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +struct _LIBCPP_TYPE_VIS space_info { + uintmax_t capacity; + uintmax_t free; + uintmax_t available; +}; + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_SPACE_INFO_H diff --git a/libcxx/include/__filesystem/u8path.h b/libcxx/include/__filesystem/u8path.h new file mode 100644 index 000000000000..dca3b0c5028b --- /dev/null +++ b/libcxx/include/__filesystem/u8path.h @@ -0,0 +1,96 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___FILESYSTEM_U8PATH_H +#define _LIBCPP___FILESYSTEM_U8PATH_H + +#include <__availability> +#include <__config> +#include <__filesystem/path.h> +#include <type_traits> + +#ifndef _LIBCPP_CXX03_LANG + +_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM + +_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH + +template <class _InputIt> +_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T + typename enable_if<__is_pathable<_InputIt>::value, path>::type + u8path(_InputIt __f, _InputIt __l) { + static_assert( +#ifndef _LIBCPP_HAS_NO_CHAR8_T + is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value || +#endif + is_same<typename __is_pathable<_InputIt>::__char_type, char>::value, + "u8path(Iter, Iter) requires Iter have a value_type of type 'char'" + " or 'char8_t'"); +#if defined(_LIBCPP_WIN32API) + string __tmp(__f, __l); + using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>; + _VSTD::wstring __w; + __w.reserve(__tmp.size()); + _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size()); + return path(__w); +#else + return path(__f, __l); +#endif /* !_LIBCPP_WIN32API */ +} + +#if defined(_LIBCPP_WIN32API) +template <class _InputIt> +_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T + typename enable_if<__is_pathable<_InputIt>::value, path>::type + u8path(_InputIt __f, _NullSentinel) { + static_assert( +#ifndef _LIBCPP_HAS_NO_CHAR8_T + is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value || +#endif + is_same<typename __is_pathable<_InputIt>::__char_type, char>::value, + "u8path(Iter, Iter) requires Iter have a value_type of type 'char'" + " or 'char8_t'"); + string __tmp; + const char __sentinel = char{}; + for (; *__f != __sentinel; ++__f) + __tmp.push_back(*__f); + using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>; + _VSTD::wstring __w; + __w.reserve(__tmp.size()); + _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size()); + return path(__w); +} +#endif /* _LIBCPP_WIN32API */ + +template <class _Source> +_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T + typename enable_if<__is_pathable<_Source>::value, path>::type + u8path(const _Source& __s) { + static_assert( +#ifndef _LIBCPP_HAS_NO_CHAR8_T + is_same<typename __is_pathable<_Source>::__char_type, char8_t>::value || +#endif + is_same<typename __is_pathable<_Source>::__char_type, char>::value, + "u8path(Source const&) requires Source have a character type of type " + "'char' or 'char8_t'"); +#if defined(_LIBCPP_WIN32API) + using _Traits = __is_pathable<_Source>; + return u8path(_VSTD::__unwrap_iter(_Traits::__range_begin(__s)), _VSTD::__unwrap_iter(_Traits::__range_end(__s))); +#else + return path(__s); +#endif +} + +_LIBCPP_AVAILABILITY_FILESYSTEM_POP + +_LIBCPP_END_NAMESPACE_FILESYSTEM + +#endif // _LIBCPP_CXX03_LANG + +#endif // _LIBCPP___FILESYSTEM_U8PATH_H diff --git a/libcxx/include/__format/format_arg.h b/libcxx/include/__format/format_arg.h index a9a8c1f0da03..59429c13d415 100644 --- a/libcxx/include/__format/format_arg.h +++ b/libcxx/include/__format/format_arg.h @@ -37,21 +37,20 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if !defined(_LIBCPP_HAS_NO_CONCEPTS) namespace __format { -/** The type stored in @ref basic_format_arg. */ +/// The type stored in @ref basic_format_arg. +/// +/// @note The 128-bit types are unconditionally in the list to avoid the values +/// of the enums to depend on the availability of 128-bit integers. enum class _LIBCPP_ENUM_VIS __arg_t : uint8_t { __none, __boolean, __char_type, __int, __long_long, -#ifndef _LIBCPP_HAS_NO_INT128 __i128, -#endif __unsigned, __unsigned_long_long, -#ifndef _LIBCPP_HAS_NO_INT128 __u128, -#endif __float, __double, __long_double, @@ -75,18 +74,22 @@ visit_format_arg(_Visitor&& __vis, basic_format_arg<_Context> __arg) { return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__int); case __format::__arg_t::__long_long: return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__long_long); -#ifndef _LIBCPP_HAS_NO_INT128 case __format::__arg_t::__i128: +#ifndef _LIBCPP_HAS_NO_INT128 return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__i128); +#else + _LIBCPP_UNREACHABLE(); #endif case __format::__arg_t::__unsigned: return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__unsigned); case __format::__arg_t::__unsigned_long_long: return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__unsigned_long_long); -#ifndef _LIBCPP_HAS_NO_INT128 case __format::__arg_t::__u128: +#ifndef _LIBCPP_HAS_NO_INT128 return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__u128); +#else + _LIBCPP_UNREACHABLE(); #endif case __format::__arg_t::__float: return _VSTD::invoke(_VSTD::forward<_Visitor>(__vis), __arg.__float); diff --git a/libcxx/include/__format/format_context.h b/libcxx/include/__format/format_context.h index b4fe5cc7b12c..f8ec7c8eb001 100644 --- a/libcxx/include/__format/format_context.h +++ b/libcxx/include/__format/format_context.h @@ -14,10 +14,9 @@ #include <__config> #include <__format/format_args.h> #include <__format/format_fwd.h> +#include <__iterator/back_insert_iterator.h> #include <__iterator/concepts.h> #include <concepts> -#include <iterator> -#include <string> #ifndef _LIBCPP_HAS_NO_LOCALIZATION #include <locale> diff --git a/libcxx/include/__format/formatter_string.h b/libcxx/include/__format/formatter_string.h index 2be36a1ba947..75a81f5184a0 100644 --- a/libcxx/include/__format/formatter_string.h +++ b/libcxx/include/__format/formatter_string.h @@ -16,7 +16,6 @@ #include <__format/format_string.h> #include <__format/formatter.h> #include <__format/parser_std_format_spec.h> -#include <algorithm> #include <string_view> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) diff --git a/libcxx/include/__functional/bind.h b/libcxx/include/__functional/bind.h index 0b74d91b7746..0eb95c824664 100644 --- a/libcxx/include/__functional/bind.h +++ b/libcxx/include/__functional/bind.h @@ -70,7 +70,7 @@ _LIBCPP_FUNC_VIS extern const __ph<10> _10; /* inline */ constexpr __ph<10> _10{}; #endif // defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_LIBRARY) -} // placeholders +} // namespace placeholders template<int _Np> struct __is_placeholder<placeholders::__ph<_Np> > diff --git a/libcxx/include/__functional/function.h b/libcxx/include/__functional/function.h index 83fd7c12de2f..8336d85adf2e 100644 --- a/libcxx/include/__functional/function.h +++ b/libcxx/include/__functional/function.h @@ -946,7 +946,7 @@ public: #endif // _LIBCPP_HAS_EXTENSION_BLOCKS && !_LIBCPP_HAS_OBJC_ARC -} // __function +} // namespace __function template<class _Rp, class ..._ArgTypes> class _LIBCPP_TEMPLATE_VIS function<_Rp(_ArgTypes...)> @@ -1717,13 +1717,11 @@ public: // 20.7.16.2.3, function capacity: _LIBCPP_INLINE_VISIBILITY explicit operator bool() const {return __f_;} -private: - // deleted overloads close possible hole in the type system template<class _R2> - bool operator==(const function<_R2()>&) const;// = delete; + bool operator==(const function<_R2()>&) const = delete; template<class _R2> - bool operator!=(const function<_R2()>&) const;// = delete; -public: + bool operator!=(const function<_R2()>&) const = delete; + // 20.7.16.2.4, function invocation: _Rp operator()() const; @@ -1997,13 +1995,11 @@ public: // 20.7.16.2.3, function capacity: _LIBCPP_INLINE_VISIBILITY explicit operator bool() const {return __f_;} -private: - // deleted overloads close possible hole in the type system template<class _R2, class _B0> - bool operator==(const function<_R2(_B0)>&) const;// = delete; + bool operator==(const function<_R2(_B0)>&) const = delete; template<class _R2, class _B0> - bool operator!=(const function<_R2(_B0)>&) const;// = delete; -public: + bool operator!=(const function<_R2(_B0)>&) const = delete; + // 20.7.16.2.4, function invocation: _Rp operator()(_A0) const; @@ -2277,13 +2273,11 @@ public: // 20.7.16.2.3, function capacity: _LIBCPP_INLINE_VISIBILITY explicit operator bool() const {return __f_;} -private: - // deleted overloads close possible hole in the type system template<class _R2, class _B0, class _B1> - bool operator==(const function<_R2(_B0, _B1)>&) const;// = delete; + bool operator==(const function<_R2(_B0, _B1)>&) const = delete; template<class _R2, class _B0, class _B1> - bool operator!=(const function<_R2(_B0, _B1)>&) const;// = delete; -public: + bool operator!=(const function<_R2(_B0, _B1)>&) const = delete; + // 20.7.16.2.4, function invocation: _Rp operator()(_A0, _A1) const; @@ -2556,13 +2550,11 @@ public: // 20.7.16.2.3, function capacity: _LIBCPP_INLINE_VISIBILITY explicit operator bool() const {return __f_;} -private: - // deleted overloads close possible hole in the type system template<class _R2, class _B0, class _B1, class _B2> - bool operator==(const function<_R2(_B0, _B1, _B2)>&) const;// = delete; + bool operator==(const function<_R2(_B0, _B1, _B2)>&) const = delete; template<class _R2, class _B0, class _B1, class _B2> - bool operator!=(const function<_R2(_B0, _B1, _B2)>&) const;// = delete; -public: + bool operator!=(const function<_R2(_B0, _B1, _B2)>&) const = delete; + // 20.7.16.2.4, function invocation: _Rp operator()(_A0, _A1, _A2) const; diff --git a/libcxx/include/__iterator/advance.h b/libcxx/include/__iterator/advance.h index a60052a08f0d..2236a57936cc 100644 --- a/libcxx/include/__iterator/advance.h +++ b/libcxx/include/__iterator/advance.h @@ -69,6 +69,7 @@ void advance(_InputIter& __i, _Distance __orig_n) { namespace ranges { // [range.iter.op.advance] +// TODO(varconst): rename `__advance_fn` to `__fn`. struct __advance_fn final : private __function_like { private: template <class _Tp> diff --git a/libcxx/include/__iterator/concepts.h b/libcxx/include/__iterator/concepts.h index 531acdf0a5b2..d7a666743afb 100644 --- a/libcxx/include/__iterator/concepts.h +++ b/libcxx/include/__iterator/concepts.h @@ -28,8 +28,6 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if !defined(_LIBCPP_HAS_NO_RANGES) -// clang-format off - // [iterator.concept.readable] template<class _In> concept __indirectly_readable_impl = @@ -259,8 +257,6 @@ concept indirectly_movable_storable = // Note: indirectly_swappable is located in iter_swap.h to prevent a dependency cycle // (both iter_swap and indirectly_swappable require indirectly_readable). -// clang-format on - #endif // !defined(_LIBCPP_HAS_NO_RANGES) _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/__iterator/next.h b/libcxx/include/__iterator/next.h index 0464708607d4..d332abfa8e0e 100644 --- a/libcxx/include/__iterator/next.h +++ b/libcxx/include/__iterator/next.h @@ -39,6 +39,7 @@ inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 #if !defined(_LIBCPP_HAS_NO_RANGES) namespace ranges { +// TODO(varconst): rename `__next_fn` to `__fn`. struct __next_fn final : private __function_like { _LIBCPP_HIDE_FROM_ABI constexpr explicit __next_fn(__tag __x) noexcept : __function_like(__x) {} @@ -79,4 +80,4 @@ inline constexpr auto next = __next_fn(__function_like::__tag()); _LIBCPP_END_NAMESPACE_STD -#endif // _LIBCPP___ITERATOR_PRIMITIVES_H +#endif // _LIBCPP___ITERATOR_NEXT_H diff --git a/libcxx/include/__iterator/prev.h b/libcxx/include/__iterator/prev.h index cbe1e8759af3..57f2d04a1325 100644 --- a/libcxx/include/__iterator/prev.h +++ b/libcxx/include/__iterator/prev.h @@ -38,6 +38,7 @@ inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 #if !defined(_LIBCPP_HAS_NO_RANGES) namespace ranges { +// TODO(varconst): rename `__prev_fn` to `__fn`. struct __prev_fn final : private __function_like { _LIBCPP_HIDE_FROM_ABI constexpr explicit __prev_fn(__tag __x) noexcept : __function_like(__x) {} diff --git a/libcxx/include/__locale b/libcxx/include/__locale index 4296adbbd8e9..2582a90bb578 100644 --- a/libcxx/include/__locale +++ b/libcxx/include/__locale @@ -208,10 +208,11 @@ class _LIBCPP_TYPE_VIS locale::id static int32_t __next_id; public: _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR id() :__id_(0) {} + void operator=(const id&) = delete; + id(const id&) = delete; + private: void __init(); - void operator=(const id&); // = delete; - id(const id&); // = delete; public: // only needed for tests long __get(); diff --git a/libcxx/include/__memory/allocator.h b/libcxx/include/__memory/allocator.h index 283212fb703d..708bd82b02d2 100644 --- a/libcxx/include/__memory/allocator.h +++ b/libcxx/include/__memory/allocator.h @@ -89,7 +89,7 @@ public: typedef true_type is_always_equal; _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 - allocator() _NOEXCEPT _LIBCPP_DEFAULT + allocator() _NOEXCEPT = default; template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 @@ -171,7 +171,7 @@ public: typedef true_type is_always_equal; _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 - allocator() _NOEXCEPT _LIBCPP_DEFAULT + allocator() _NOEXCEPT = default; template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 diff --git a/libcxx/include/__memory/compressed_pair.h b/libcxx/include/__memory/compressed_pair.h index fd1fcbe5bf39..fd6d7109f8eb 100644 --- a/libcxx/include/__memory/compressed_pair.h +++ b/libcxx/include/__memory/compressed_pair.h @@ -58,10 +58,8 @@ struct __compressed_pair_elem { : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} #endif - - _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } - _LIBCPP_INLINE_VISIBILITY - const_reference __get() const _NOEXCEPT { return __value_; } + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 reference __get() _NOEXCEPT { return __value_; } + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __get() const _NOEXCEPT { return __value_; } private: _Tp __value_; @@ -97,9 +95,8 @@ struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} #endif - _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } - _LIBCPP_INLINE_VISIBILITY - const_reference __get() const _NOEXCEPT { return *this; } + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 reference __get() _NOEXCEPT { return *this; } + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __get() const _NOEXCEPT { return *this; } }; template <class _T1, class _T2> @@ -143,23 +140,19 @@ public: typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} #endif - _LIBCPP_INLINE_VISIBILITY - typename _Base1::reference first() _NOEXCEPT { + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 typename _Base1::reference first() _NOEXCEPT { return static_cast<_Base1&>(*this).__get(); } - _LIBCPP_INLINE_VISIBILITY - typename _Base1::const_reference first() const _NOEXCEPT { + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR typename _Base1::const_reference first() const _NOEXCEPT { return static_cast<_Base1 const&>(*this).__get(); } - _LIBCPP_INLINE_VISIBILITY - typename _Base2::reference second() _NOEXCEPT { + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 typename _Base2::reference second() _NOEXCEPT { return static_cast<_Base2&>(*this).__get(); } - _LIBCPP_INLINE_VISIBILITY - typename _Base2::const_reference second() const _NOEXCEPT { + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR typename _Base2::const_reference second() const _NOEXCEPT { return static_cast<_Base2 const&>(*this).__get(); } @@ -172,11 +165,8 @@ public: return static_cast<_Base2*>(__pair); } - _LIBCPP_INLINE_VISIBILITY - void swap(__compressed_pair& __x) - _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && - __is_nothrow_swappable<_T2>::value) - { + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 void swap(__compressed_pair& __x) + _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && __is_nothrow_swappable<_T2>::value) { using _VSTD::swap; swap(first(), __x.first()); swap(second(), __x.second()); @@ -184,10 +174,9 @@ public: }; template <class _T1, class _T2> -inline _LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) - _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && - __is_nothrow_swappable<_T2>::value) { + _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && __is_nothrow_swappable<_T2>::value) { __x.swap(__y); } diff --git a/libcxx/include/__memory/concepts.h b/libcxx/include/__memory/concepts.h new file mode 100644 index 000000000000..4029b590fe8c --- /dev/null +++ b/libcxx/include/__memory/concepts.h @@ -0,0 +1,66 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___MEMORY_CONCEPTS_H +#define _LIBCPP___MEMORY_CONCEPTS_H + +#include <__config> +#include <__iterator/concepts.h> +#include <__iterator/iterator_traits.h> +#include <__iterator/readable_traits.h> +#include <__ranges/access.h> +#include <__ranges/concepts.h> +#include <concepts> +#include <type_traits> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if !defined(_LIBCPP_HAS_NO_RANGES) +namespace ranges { + +// [special.mem.concepts] + +// This concept ensures that uninitialized algorithms can construct an object +// at the address pointed-to by the iterator, which requires an lvalue. +template <class _Ip> +concept __nothrow_input_iterator = + input_iterator<_Ip> && + is_lvalue_reference_v<iter_reference_t<_Ip>> && + same_as<remove_cvref_t<iter_reference_t<_Ip>>, iter_value_t<_Ip>>; + +template <class _Sp, class _Ip> +concept __nothrow_sentinel_for = sentinel_for<_Sp, _Ip>; + +template <class _Rp> +concept __nothrow_input_range = + range<_Rp> && + __nothrow_input_iterator<iterator_t<_Rp>> && + __nothrow_sentinel_for<sentinel_t<_Rp>, iterator_t<_Rp>>; + +template <class _Ip> +concept __nothrow_forward_iterator = + __nothrow_input_iterator<_Ip> && + forward_iterator<_Ip> && + __nothrow_sentinel_for<_Ip, _Ip>; + +template <class _Rp> +concept __nothrow_forward_range = + __nothrow_input_range<_Rp> && + __nothrow_forward_iterator<iterator_t<_Rp>>; + +} // namespace ranges +#endif // !defined(_LIBCPP_HAS_NO_RANGES) + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP___MEMORY_CONCEPTS_H diff --git a/libcxx/include/__memory/construct_at.h b/libcxx/include/__memory/construct_at.h index 789677d7a613..3b58451c5009 100644 --- a/libcxx/include/__memory/construct_at.h +++ b/libcxx/include/__memory/construct_at.h @@ -41,44 +41,67 @@ constexpr _Tp* construct_at(_Tp* __location, _Args&& ...__args) { // destroy_at -#if _LIBCPP_STD_VER > 14 +// The internal functions are available regardless of the language version (with the exception of the `__destroy_at` +// taking an array). template <class _ForwardIterator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 -void destroy(_ForwardIterator, _ForwardIterator); +void __destroy(_ForwardIterator, _ForwardIterator); -template <class _Tp, enable_if_t<!is_array_v<_Tp>, int> = 0> +template <class _Tp, typename enable_if<!is_array<_Tp>::value, int>::type = 0> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 -void destroy_at(_Tp* __loc) { +void __destroy_at(_Tp* __loc) { _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); __loc->~_Tp(); } #if _LIBCPP_STD_VER > 17 +template <class _Tp, typename enable_if<is_array<_Tp>::value, int>::type = 0> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 +void __destroy_at(_Tp* __loc) { + _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); + _VSTD::__destroy(_VSTD::begin(*__loc), _VSTD::end(*__loc)); +} +#endif + +template <class _ForwardIterator> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 +void __destroy(_ForwardIterator __first, _ForwardIterator __last) { + for (; __first != __last; ++__first) + _VSTD::__destroy_at(_VSTD::addressof(*__first)); +} + +#if _LIBCPP_STD_VER > 14 + +template <class _Tp, enable_if_t<!is_array_v<_Tp>, int> = 0> +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 +void destroy_at(_Tp* __loc) { + _VSTD::__destroy_at(__loc); +} + +#if _LIBCPP_STD_VER > 17 template <class _Tp, enable_if_t<is_array_v<_Tp>, int> = 0> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 void destroy_at(_Tp* __loc) { - _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); - _VSTD::destroy(_VSTD::begin(*__loc), _VSTD::end(*__loc)); + _VSTD::__destroy_at(__loc); } #endif template <class _ForwardIterator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 void destroy(_ForwardIterator __first, _ForwardIterator __last) { - for (; __first != __last; ++__first) - _VSTD::destroy_at(_VSTD::addressof(*__first)); + _VSTD::__destroy(_VSTD::move(__first), _VSTD::move(__last)); } template <class _ForwardIterator, class _Size> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { for (; __n > 0; (void)++__first, --__n) - _VSTD::destroy_at(_VSTD::addressof(*__first)); + _VSTD::__destroy_at(_VSTD::addressof(*__first)); return __first; } -#endif +#endif // _LIBCPP_STD_VER > 14 _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/__memory/ranges_uninitialized_algorithms.h b/libcxx/include/__memory/ranges_uninitialized_algorithms.h new file mode 100644 index 000000000000..6ec803806c05 --- /dev/null +++ b/libcxx/include/__memory/ranges_uninitialized_algorithms.h @@ -0,0 +1,212 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H +#define _LIBCPP___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H + +#include <__concepts/constructible.h> +#include <__config> +#include <__function_like.h> +#include <__iterator/incrementable_traits.h> +#include <__iterator/iterator_traits.h> +#include <__iterator/readable_traits.h> +#include <__memory/concepts.h> +#include <__memory/uninitialized_algorithms.h> +#include <__ranges/access.h> +#include <__ranges/concepts.h> +#include <__ranges/dangling.h> +#include <__utility/move.h> +#include <type_traits> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if !defined(_LIBCPP_HAS_NO_RANGES) +namespace ranges { + +// uninitialized_default_construct + +namespace __uninitialized_default_construct { + +struct __fn final : private __function_like { + + constexpr explicit __fn(__tag __x) noexcept : __function_like(__x) {} + + template <__nothrow_forward_iterator _ForwardIterator, + __nothrow_sentinel_for<_ForwardIterator> _Sentinel> + requires default_initializable<iter_value_t<_ForwardIterator>> + _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last) const { + using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>; + return _VSTD::__uninitialized_default_construct<_ValueType>( + _VSTD::move(__first), _VSTD::move(__last)); + } + + template <__nothrow_forward_range _ForwardRange> + requires default_initializable<range_value_t<_ForwardRange>> + borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range) const { + return (*this)(ranges::begin(__range), ranges::end(__range)); + } + +}; + +} // namespace __uninitialized_default_construct + +inline namespace __cpo { +inline constexpr auto uninitialized_default_construct = + __uninitialized_default_construct::__fn(__function_like::__tag()); +} // namespace __cpo + +// uninitialized_default_construct_n + +namespace __uninitialized_default_construct_n { + +struct __fn final : private __function_like { + + constexpr explicit __fn(__tag __x) noexcept : + __function_like(__x) {} + + template <__nothrow_forward_iterator _ForwardIterator> + requires default_initializable<iter_value_t<_ForwardIterator>> + _ForwardIterator operator()(_ForwardIterator __first, + iter_difference_t<_ForwardIterator> __n) const { + using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>; + return _VSTD::__uninitialized_default_construct_n<_ValueType>(_VSTD::move(__first), __n); + } + +}; + +} // namespace __uninitialized_default_construct_n + +inline namespace __cpo { +inline constexpr auto uninitialized_default_construct_n = + __uninitialized_default_construct_n::__fn(__function_like::__tag()); +} // namespace __cpo + +// uninitialized_value_construct + +namespace __uninitialized_value_construct { + +struct __fn final : private __function_like { + + constexpr explicit __fn(__tag __x) noexcept : __function_like(__x) {} + + template <__nothrow_forward_iterator _ForwardIterator, + __nothrow_sentinel_for<_ForwardIterator> _Sentinel> + requires default_initializable<iter_value_t<_ForwardIterator>> + _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last) const { + using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>; + return _VSTD::__uninitialized_value_construct<_ValueType>( + _VSTD::move(__first), _VSTD::move(__last)); + } + + template <__nothrow_forward_range _ForwardRange> + requires default_initializable<range_value_t<_ForwardRange>> + borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range) const { + return (*this)(ranges::begin(__range), ranges::end(__range)); + } + +}; + +} // namespace __uninitialized_value_construct + +inline namespace __cpo { +inline constexpr auto uninitialized_value_construct = + __uninitialized_value_construct::__fn(__function_like::__tag()); +} // namespace __cpo + +// uninitialized_value_construct_n + +namespace __uninitialized_value_construct_n { + +struct __fn final : private __function_like { + + constexpr explicit __fn(__tag __x) noexcept : __function_like(__x) {} + + template <__nothrow_forward_iterator _ForwardIterator> + requires default_initializable<iter_value_t<_ForwardIterator>> + _ForwardIterator operator()(_ForwardIterator __first, + iter_difference_t<_ForwardIterator> __n) const { + using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>; + return _VSTD::__uninitialized_value_construct_n<_ValueType>(_VSTD::move(__first), __n); + } + +}; + +} // namespace __uninitialized_value_construct_n + +inline namespace __cpo { +inline constexpr auto uninitialized_value_construct_n = + __uninitialized_value_construct_n::__fn(__function_like::__tag()); +} // namespace __cpo + +// uninitialized_fill + +namespace __uninitialized_fill { + +struct __fn final : private __function_like { + + constexpr explicit __fn(__tag __x) noexcept : __function_like(__x) {} + + template <__nothrow_forward_iterator _ForwardIterator, + __nothrow_sentinel_for<_ForwardIterator> _Sentinel, + class _Tp> + requires constructible_from<iter_value_t<_ForwardIterator>, const _Tp&> + _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last, const _Tp& __x) const { + using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>; + return _VSTD::__uninitialized_fill<_ValueType>(_VSTD::move(__first), _VSTD::move(__last), __x); + } + + template <__nothrow_forward_range _ForwardRange, class _Tp> + requires constructible_from<range_value_t<_ForwardRange>, const _Tp&> + borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range, const _Tp& __x) const { + return (*this)(ranges::begin(__range), ranges::end(__range), __x); + } + +}; + +} // namespace __uninitialized_fil + +inline namespace __cpo { +inline constexpr auto uninitialized_fill = __uninitialized_fill::__fn(__function_like::__tag()); +} // namespace __cpo + +// uninitialized_fill_n + +namespace __uninitialized_fill_n { + +struct __fn final : private __function_like { + + constexpr explicit __fn(__tag __x) noexcept : __function_like(__x) {} + + template <__nothrow_forward_iterator _ForwardIterator, class _Tp> + requires constructible_from<iter_value_t<_ForwardIterator>, const _Tp&> + _ForwardIterator operator()(_ForwardIterator __first, + iter_difference_t<_ForwardIterator> __n, + const _Tp& __x) const { + using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>; + return _VSTD::__uninitialized_fill_n<_ValueType>(_VSTD::move(__first), __n, __x); + } + +}; + +} // namespace __uninitialized_fill_n + +inline namespace __cpo { +inline constexpr auto uninitialized_fill_n = __uninitialized_fill_n::__fn(__function_like::__tag()); +} // namespace __cpo + +} // namespace ranges +#endif // !defined(_LIBCPP_HAS_NO_RANGES) + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H diff --git a/libcxx/include/__memory/uninitialized_algorithms.h b/libcxx/include/__memory/uninitialized_algorithms.h index e83d62e0db08..69132633a48e 100644 --- a/libcxx/include/__memory/uninitialized_algorithms.h +++ b/libcxx/include/__memory/uninitialized_algorithms.h @@ -13,6 +13,7 @@ #include <__config> #include <__memory/addressof.h> #include <__memory/construct_at.h> +#include <__memory/voidify.h> #include <iterator> #include <utility> @@ -70,130 +71,187 @@ uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) return __r; } -template <class _ForwardIterator, class _Tp> -void -uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) +// uninitialized_fill + +template <class _ValueType, class _ForwardIterator, class _Sentinel, class _Tp> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator __uninitialized_fill(_ForwardIterator __first, _Sentinel __last, const _Tp& __x) { - typedef typename iterator_traits<_ForwardIterator>::value_type value_type; + _ForwardIterator __idx = __first; #ifndef _LIBCPP_NO_EXCEPTIONS - _ForwardIterator __s = __f; try { #endif - for (; __f != __l; ++__f) - ::new ((void*)_VSTD::addressof(*__f)) value_type(__x); + for (; __idx != __last; ++__idx) + ::new (_VSTD::__voidify(*__idx)) _ValueType(__x); #ifndef _LIBCPP_NO_EXCEPTIONS } catch (...) { - for (; __s != __f; ++__s) - __s->~value_type(); + _VSTD::__destroy(__first, __idx); throw; } #endif + + return __idx; } -template <class _ForwardIterator, class _Size, class _Tp> -_ForwardIterator -uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) +template <class _ForwardIterator, class _Tp> +inline _LIBCPP_HIDE_FROM_ABI +void uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __x) { - typedef typename iterator_traits<_ForwardIterator>::value_type value_type; + typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType; + (void)_VSTD::__uninitialized_fill<_ValueType>(__first, __last, __x); +} + +// uninitialized_fill_n + +template <class _ValueType, class _ForwardIterator, class _Size, class _Tp> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator __uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x) +{ + _ForwardIterator __idx = __first; #ifndef _LIBCPP_NO_EXCEPTIONS - _ForwardIterator __s = __f; try { #endif - for (; __n > 0; ++__f, (void) --__n) - ::new ((void*)_VSTD::addressof(*__f)) value_type(__x); + for (; __n > 0; ++__idx, (void) --__n) + ::new (_VSTD::__voidify(*__idx)) _ValueType(__x); #ifndef _LIBCPP_NO_EXCEPTIONS } catch (...) { - for (; __s != __f; ++__s) - __s->~value_type(); + _VSTD::__destroy(__first, __idx); throw; } #endif - return __f; + + return __idx; +} + +template <class _ForwardIterator, class _Size, class _Tp> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x) +{ + typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType; + return _VSTD::__uninitialized_fill_n<_ValueType>(__first, __n, __x); } #if _LIBCPP_STD_VER > 14 -template <class _ForwardIterator> -inline _LIBCPP_INLINE_VISIBILITY -void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { - using _Vt = typename iterator_traits<_ForwardIterator>::value_type; +// uninitialized_default_construct + +template <class _ValueType, class _ForwardIterator, class _Sentinel> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator __uninitialized_default_construct(_ForwardIterator __first, _Sentinel __last) { auto __idx = __first; #ifndef _LIBCPP_NO_EXCEPTIONS try { #endif for (; __idx != __last; ++__idx) - ::new ((void*)_VSTD::addressof(*__idx)) _Vt; + ::new (_VSTD::__voidify(*__idx)) _ValueType; #ifndef _LIBCPP_NO_EXCEPTIONS } catch (...) { - _VSTD::destroy(__first, __idx); + _VSTD::__destroy(__first, __idx); throw; } #endif + + return __idx; } -template <class _ForwardIterator, class _Size> -inline _LIBCPP_INLINE_VISIBILITY -_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { - using _Vt = typename iterator_traits<_ForwardIterator>::value_type; +template <class _ForwardIterator> +inline _LIBCPP_HIDE_FROM_ABI +void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { + using _ValueType = typename iterator_traits<_ForwardIterator>::value_type; + (void)_VSTD::__uninitialized_default_construct<_ValueType>( + _VSTD::move(__first), _VSTD::move(__last)); +} + +// uninitialized_default_construct_n + +template <class _ValueType, class _ForwardIterator, class _Size> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator __uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { auto __idx = __first; #ifndef _LIBCPP_NO_EXCEPTIONS try { #endif for (; __n > 0; ++__idx, (void) --__n) - ::new ((void*)_VSTD::addressof(*__idx)) _Vt; - return __idx; + ::new (_VSTD::__voidify(*__idx)) _ValueType; #ifndef _LIBCPP_NO_EXCEPTIONS } catch (...) { - _VSTD::destroy(__first, __idx); + _VSTD::__destroy(__first, __idx); throw; } #endif + + return __idx; } +template <class _ForwardIterator, class _Size> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { + using _ValueType = typename iterator_traits<_ForwardIterator>::value_type; + return _VSTD::__uninitialized_default_construct_n<_ValueType>(_VSTD::move(__first), __n); +} -template <class _ForwardIterator> -inline _LIBCPP_INLINE_VISIBILITY -void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { - using _Vt = typename iterator_traits<_ForwardIterator>::value_type; +// uninitialized_value_construct + +template <class _ValueType, class _ForwardIterator, class _Sentinel> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator __uninitialized_value_construct(_ForwardIterator __first, _Sentinel __last) { auto __idx = __first; #ifndef _LIBCPP_NO_EXCEPTIONS try { #endif for (; __idx != __last; ++__idx) - ::new ((void*)_VSTD::addressof(*__idx)) _Vt(); + ::new (_VSTD::__voidify(*__idx)) _ValueType(); #ifndef _LIBCPP_NO_EXCEPTIONS } catch (...) { - _VSTD::destroy(__first, __idx); + _VSTD::__destroy(__first, __idx); throw; } #endif + + return __idx; } -template <class _ForwardIterator, class _Size> -inline _LIBCPP_INLINE_VISIBILITY -_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { - using _Vt = typename iterator_traits<_ForwardIterator>::value_type; +template <class _ForwardIterator> +inline _LIBCPP_HIDE_FROM_ABI +void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { + using _ValueType = typename iterator_traits<_ForwardIterator>::value_type; + (void)_VSTD::__uninitialized_value_construct<_ValueType>( + _VSTD::move(__first), _VSTD::move(__last)); +} + +// uninitialized_value_construct_n + +template <class _ValueType, class _ForwardIterator, class _Size> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator __uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { auto __idx = __first; #ifndef _LIBCPP_NO_EXCEPTIONS try { #endif for (; __n > 0; ++__idx, (void) --__n) - ::new ((void*)_VSTD::addressof(*__idx)) _Vt(); - return __idx; + ::new (_VSTD::__voidify(*__idx)) _ValueType(); #ifndef _LIBCPP_NO_EXCEPTIONS } catch (...) { - _VSTD::destroy(__first, __idx); + _VSTD::__destroy(__first, __idx); throw; } #endif + + return __idx; } +template <class _ForwardIterator, class _Size> +inline _LIBCPP_HIDE_FROM_ABI +_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { + using _ValueType = typename iterator_traits<_ForwardIterator>::value_type; + return __uninitialized_value_construct_n<_ValueType>(_VSTD::move(__first), __n); +} template <class _InputIt, class _ForwardIt> inline _LIBCPP_INLINE_VISIBILITY diff --git a/libcxx/include/__memory/voidify.h b/libcxx/include/__memory/voidify.h new file mode 100644 index 000000000000..3a65c0e83fb7 --- /dev/null +++ b/libcxx/include/__memory/voidify.h @@ -0,0 +1,30 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___MEMORY_VOIDIFY_H +#define _LIBCPP___MEMORY_VOIDIFY_H + +#include <__config> +#include <__memory/addressof.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +# pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <typename _Tp> +_LIBCPP_ALWAYS_INLINE _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 void* __voidify(_Tp& __from) { + // Cast away cv-qualifiers to allow modifying elements of a range through const iterators. + return const_cast<void*>(static_cast<const volatile void*>(_VSTD::addressof(__from))); +} + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP___MEMORY_VOIDIFY_H diff --git a/libcxx/include/__mutex_base b/libcxx/include/__mutex_base index da2967164a68..21e2075603b5 100644 --- a/libcxx/include/__mutex_base +++ b/libcxx/include/__mutex_base @@ -140,11 +140,9 @@ public: __m_->unlock(); } -private: - unique_lock(unique_lock const&); // = delete; - unique_lock& operator=(unique_lock const&); // = delete; + unique_lock(unique_lock const&) = delete; + unique_lock& operator=(unique_lock const&) = delete; -public: _LIBCPP_INLINE_VISIBILITY unique_lock(unique_lock&& __u) _NOEXCEPT : __m_(__u.__m_), __owns_(__u.__owns_) diff --git a/libcxx/include/__nullptr b/libcxx/include/__nullptr index d02be215ef1d..c6645cd0150e 100644 --- a/libcxx/include/__nullptr +++ b/libcxx/include/__nullptr @@ -54,7 +54,7 @@ _LIBCPP_END_NAMESPACE_STD namespace std { typedef decltype(nullptr) nullptr_t; -} +} // namespace std #endif // _LIBCPP_HAS_NO_NULLPTR diff --git a/libcxx/include/__random/clamp_to_integral.h b/libcxx/include/__random/clamp_to_integral.h new file mode 100644 index 000000000000..dd5d2b0186e4 --- /dev/null +++ b/libcxx/include/__random/clamp_to_integral.h @@ -0,0 +1,60 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___RANDOM_CLAMP_TO_INTEGRAL_H +#define _LIBCPP___RANDOM_CLAMP_TO_INTEGRAL_H + +#include <__config> +#include <cmath> +#include <limits> +#include <type_traits> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +template <class _IntT, class _FloatT, + bool _FloatBigger = (numeric_limits<_FloatT>::digits > numeric_limits<_IntT>::digits), + int _Bits = (numeric_limits<_IntT>::digits - numeric_limits<_FloatT>::digits)> +_LIBCPP_INLINE_VISIBILITY +_LIBCPP_CONSTEXPR _IntT __max_representable_int_for_float() _NOEXCEPT { + static_assert(is_floating_point<_FloatT>::value, "must be a floating point type"); + static_assert(is_integral<_IntT>::value, "must be an integral type"); + static_assert(numeric_limits<_FloatT>::radix == 2, "FloatT has incorrect radix"); + static_assert((_IsSame<_FloatT, float>::value || _IsSame<_FloatT, double>::value + || _IsSame<_FloatT,long double>::value), "unsupported floating point type"); + return _FloatBigger ? numeric_limits<_IntT>::max() : (numeric_limits<_IntT>::max() >> _Bits << _Bits); +} + +// Convert a floating point number to the specified integral type after +// clamping to the integral type's representable range. +// +// The behavior is undefined if `__r` is NaN. +template <class _IntT, class _RealT> +_LIBCPP_INLINE_VISIBILITY +_IntT __clamp_to_integral(_RealT __r) _NOEXCEPT { + using _Lim = numeric_limits<_IntT>; + const _IntT _MaxVal = __max_representable_int_for_float<_IntT, _RealT>(); + if (__r >= ::nextafter(static_cast<_RealT>(_MaxVal), INFINITY)) { + return _Lim::max(); + } else if (__r <= _Lim::lowest()) { + return _Lim::min(); + } + return static_cast<_IntT>(__r); +} + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___RANDOM_CLAMP_TO_INTEGRAL_H diff --git a/libcxx/include/__random/poisson_distribution.h b/libcxx/include/__random/poisson_distribution.h index fb213b0103ad..d157e8f230ef 100644 --- a/libcxx/include/__random/poisson_distribution.h +++ b/libcxx/include/__random/poisson_distribution.h @@ -10,6 +10,7 @@ #define _LIBCPP___RANDOM_POISSON_DISTRIBUTION_H #include <__config> +#include <__random/clamp_to_integral.h> #include <__random/exponential_distribution.h> #include <__random/normal_distribution.h> #include <__random/uniform_real_distribution.h> diff --git a/libcxx/include/__random/random_device.h b/libcxx/include/__random/random_device.h index f62f7a3d269b..835f726fdbcc 100644 --- a/libcxx/include/__random/random_device.h +++ b/libcxx/include/__random/random_device.h @@ -27,7 +27,7 @@ class _LIBCPP_TYPE_VIS random_device { #ifdef _LIBCPP_USING_DEV_RANDOM int __f_; -#endif // defined(_LIBCPP_USING_DEV_RANDOM) +#endif public: // types typedef unsigned result_type; @@ -56,10 +56,8 @@ public: // property functions double entropy() const _NOEXCEPT; -private: - // no copy functions - random_device(const random_device&); // = delete; - random_device& operator=(const random_device&); // = delete; + random_device(const random_device&) = delete; + void operator=(const random_device&) = delete; }; #endif // !_LIBCPP_HAS_NO_RANDOM_DEVICE diff --git a/libcxx/include/__random/seed_seq.h b/libcxx/include/__random/seed_seq.h index 97bc88d0d4d1..bf27af6627a5 100644 --- a/libcxx/include/__random/seed_seq.h +++ b/libcxx/include/__random/seed_seq.h @@ -63,10 +63,8 @@ public: void param(_OutputIterator __dest) const {_VSTD::copy(__v_.begin(), __v_.end(), __dest);} -private: - // no copy functions - seed_seq(const seed_seq&); // = delete; - void operator=(const seed_seq&); // = delete; + seed_seq(const seed_seq&) = delete; + void operator=(const seed_seq&) = delete; _LIBCPP_INLINE_VISIBILITY static result_type _Tp(result_type __x) {return __x ^ (__x >> 27);} diff --git a/libcxx/include/__ranges/access.h b/libcxx/include/__ranges/access.h index b0b89c0eeea3..91dc3055c86d 100644 --- a/libcxx/include/__ranges/access.h +++ b/libcxx/include/__ranges/access.h @@ -14,8 +14,7 @@ #include <__iterator/readable_traits.h> #include <__ranges/enable_borrowed_range.h> #include <__utility/as_const.h> -#include <__utility/decay_copy.h> -#include <__utility/forward.h> +#include <__utility/auto_cast.h> #include <concepts> #include <type_traits> @@ -27,24 +26,21 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if !defined(_LIBCPP_HAS_NO_RANGES) -// clang-format off - namespace ranges { template <class _Tp> concept __can_borrow = - is_lvalue_reference_v<_Tp> || enable_borrowed_range<remove_cvref_t<_Tp> >; - - template<class _Tp> - concept __is_complete = requires { sizeof(_Tp); }; + is_lvalue_reference_v<_Tp> || enable_borrowed_range<remove_cvref_t<_Tp>>; } // namespace ranges // [range.access.begin] -namespace ranges::__begin { + +namespace ranges { +namespace __begin { template <class _Tp> concept __member_begin = __can_borrow<_Tp> && requires(_Tp&& __t) { - { _VSTD::__decay_copy(__t.begin()) } -> input_or_output_iterator; + { _LIBCPP_AUTO_CAST(__t.begin()) } -> input_or_output_iterator; }; void begin(auto&) = delete; @@ -54,61 +50,61 @@ namespace ranges::__begin { concept __unqualified_begin = !__member_begin<_Tp> && __can_borrow<_Tp> && - __class_or_enum<remove_cvref_t<_Tp> > && + __class_or_enum<remove_cvref_t<_Tp>> && requires(_Tp && __t) { - { _VSTD::__decay_copy(begin(__t)) } -> input_or_output_iterator; + { _LIBCPP_AUTO_CAST(begin(__t)) } -> input_or_output_iterator; }; struct __fn { template <class _Tp> - requires is_array_v<remove_cv_t<_Tp>> - [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp& __t) const noexcept { - constexpr bool __complete = __is_complete<iter_value_t<_Tp> >; - if constexpr (__complete) { // used to disable cryptic diagnostic - return __t + 0; - } - else { - static_assert(__complete, "`std::ranges::begin` is SFINAE-unfriendly on arrays of an incomplete type."); - } + requires is_array_v<remove_cv_t<_Tp>> + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp& __t) const noexcept + { + return __t; } template <class _Tp> - requires __member_begin<_Tp> + requires __member_begin<_Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(_VSTD::__decay_copy(__t.begin()))) + noexcept(noexcept(_LIBCPP_AUTO_CAST(__t.begin()))) { - return __t.begin(); + return _LIBCPP_AUTO_CAST(__t.begin()); } template <class _Tp> - requires __unqualified_begin<_Tp> + requires __unqualified_begin<_Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(_VSTD::__decay_copy(begin(__t)))) + noexcept(noexcept(_LIBCPP_AUTO_CAST(begin(__t)))) { - return begin(__t); + return _LIBCPP_AUTO_CAST(begin(__t)); } void operator()(auto&&) const = delete; }; -} // namespace ranges::__begin +} -namespace ranges { - inline namespace __cpo { - inline constexpr auto begin = __begin::__fn{}; - } // namespace __cpo +inline namespace __cpo { + inline constexpr auto begin = __begin::__fn{}; +} // namespace __cpo +} // namespace ranges + +// [range.range] +namespace ranges { template <class _Tp> using iterator_t = decltype(ranges::begin(declval<_Tp&>())); } // namespace ranges // [range.access.end] -namespace ranges::__end { + +namespace ranges { +namespace __end { template <class _Tp> concept __member_end = __can_borrow<_Tp> && requires(_Tp&& __t) { typename iterator_t<_Tp>; - { _VSTD::__decay_copy(_VSTD::forward<_Tp>(__t).end()) } -> sentinel_for<iterator_t<_Tp> >; + { _LIBCPP_AUTO_CAST(__t.end()) } -> sentinel_for<iterator_t<_Tp>>; }; void end(auto&) = delete; @@ -118,98 +114,101 @@ namespace ranges::__end { concept __unqualified_end = !__member_end<_Tp> && __can_borrow<_Tp> && - __class_or_enum<remove_cvref_t<_Tp> > && + __class_or_enum<remove_cvref_t<_Tp>> && requires(_Tp && __t) { typename iterator_t<_Tp>; - { _VSTD::__decay_copy(end(_VSTD::forward<_Tp>(__t))) } -> sentinel_for<iterator_t<_Tp> >; + { _LIBCPP_AUTO_CAST(end(__t)) } -> sentinel_for<iterator_t<_Tp>>; }; class __fn { public: template <class _Tp, size_t _Np> - [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp (&__t)[_Np]) const noexcept { - constexpr bool __complete = __is_complete<remove_cv_t<_Tp> >; - if constexpr (__complete) { // used to disable cryptic diagnostic - return __t + _Np; - } - else { - static_assert(__complete, "`std::ranges::end` is SFINAE-unfriendly on arrays of an incomplete type."); - } + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp (&__t)[_Np]) const noexcept + requires (sizeof(*__t) != 0) // Disallow incomplete element types. + { + return __t + _Np; } template <class _Tp> - requires __member_end<_Tp> + requires __member_end<_Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(_VSTD::__decay_copy(__t.end()))) + noexcept(noexcept(_LIBCPP_AUTO_CAST(__t.end()))) { - return _VSTD::forward<_Tp>(__t).end(); + return _LIBCPP_AUTO_CAST(__t.end()); } template <class _Tp> - requires __unqualified_end<_Tp> + requires __unqualified_end<_Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(_VSTD::__decay_copy(end(__t)))) + noexcept(noexcept(_LIBCPP_AUTO_CAST(end(__t)))) { - return end(__t); + return _LIBCPP_AUTO_CAST(end(__t)); } void operator()(auto&&) const = delete; }; -} // namespace ranges::__end +} -namespace ranges::inline __cpo { +inline namespace __cpo { inline constexpr auto end = __end::__fn{}; -} // namespace ranges::__cpo +} // namespace __cpo +} // namespace ranges -namespace ranges::__cbegin { +// [range.access.cbegin] + +namespace ranges { +namespace __cbegin { struct __fn { template <class _Tp> - requires invocable<decltype(ranges::begin), _Tp const&> + requires invocable<decltype(ranges::begin), _Tp const&> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp& __t) const - noexcept(noexcept(ranges::begin(_VSTD::as_const(__t)))) + noexcept(noexcept(ranges::begin(_VSTD::as_const(__t)))) { return ranges::begin(_VSTD::as_const(__t)); } template <class _Tp> - requires is_rvalue_reference_v<_Tp> && invocable<decltype(ranges::begin), _Tp const&&> + requires is_rvalue_reference_v<_Tp> && invocable<decltype(ranges::begin), _Tp const&&> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(ranges::begin(static_cast<_Tp const&&>(__t)))) + noexcept(noexcept(ranges::begin(static_cast<_Tp const&&>(__t)))) { return ranges::begin(static_cast<_Tp const&&>(__t)); } }; -} // namespace ranges::__cbegin +} -namespace ranges::inline __cpo { +inline namespace __cpo { inline constexpr auto cbegin = __cbegin::__fn{}; -} // namespace ranges::__cpo +} // namespace __cpo +} // namespace ranges + +// [range.access.cend] -namespace ranges::__cend { +namespace ranges { +namespace __cend { struct __fn { template <class _Tp> - requires invocable<decltype(ranges::end), _Tp const&> + requires invocable<decltype(ranges::end), _Tp const&> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp& __t) const - noexcept(noexcept(ranges::end(_VSTD::as_const(__t)))) + noexcept(noexcept(ranges::end(_VSTD::as_const(__t)))) { return ranges::end(_VSTD::as_const(__t)); } template <class _Tp> - requires is_rvalue_reference_v<_Tp> && invocable<decltype(ranges::end), _Tp const&&> + requires is_rvalue_reference_v<_Tp> && invocable<decltype(ranges::end), _Tp const&&> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(ranges::end(static_cast<_Tp const&&>(__t)))) + noexcept(noexcept(ranges::end(static_cast<_Tp const&&>(__t)))) { return ranges::end(static_cast<_Tp const&&>(__t)); } }; -} // namespace ranges::__cend +} -namespace ranges::inline __cpo { +inline namespace __cpo { inline constexpr auto cend = __cend::__fn{}; -} // namespace ranges::__cpo - -// clang-format off +} // namespace __cpo +} // namespace ranges #endif // !defined(_LIBCPP_HAS_NO_RANGES) diff --git a/libcxx/include/__ranges/all.h b/libcxx/include/__ranges/all.h index affe13ee0862..ccc77258ba10 100644 --- a/libcxx/include/__ranges/all.h +++ b/libcxx/include/__ranges/all.h @@ -17,7 +17,7 @@ #include <__ranges/range_adaptor.h> #include <__ranges/ref_view.h> #include <__ranges/subrange.h> -#include <__utility/decay_copy.h> +#include <__utility/auto_cast.h> #include <__utility/declval.h> #include <__utility/forward.h> #include <type_traits> @@ -38,9 +38,9 @@ namespace __all { requires ranges::view<decay_t<_Tp>> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const - noexcept(noexcept(_VSTD::__decay_copy(_VSTD::forward<_Tp>(__t)))) + noexcept(noexcept(_LIBCPP_AUTO_CAST(_VSTD::forward<_Tp>(__t)))) { - return _VSTD::forward<_Tp>(__t); + return _LIBCPP_AUTO_CAST(_VSTD::forward<_Tp>(__t)); } template<class _Tp> diff --git a/libcxx/include/__ranges/concepts.h b/libcxx/include/__ranges/concepts.h index 6a8364006beb..bad23c8c4bfb 100644 --- a/libcxx/include/__ranges/concepts.h +++ b/libcxx/include/__ranges/concepts.h @@ -29,8 +29,6 @@ _LIBCPP_BEGIN_NAMESPACE_STD -// clang-format off - #if !defined(_LIBCPP_HAS_NO_RANGES) namespace ranges { @@ -126,8 +124,6 @@ namespace ranges { #endif // !defined(_LIBCPP_HAS_NO_RANGES) -// clang-format on - _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP___RANGES_CONCEPTS_H diff --git a/libcxx/include/__ranges/counted.h b/libcxx/include/__ranges/counted.h index d292bcbb1849..cb9784092420 100644 --- a/libcxx/include/__ranges/counted.h +++ b/libcxx/include/__ranges/counted.h @@ -9,6 +9,7 @@ #ifndef _LIBCPP___RANGES_COUNTED_H #define _LIBCPP___RANGES_COUNTED_H +#include <__concepts/convertible_to.h> #include <__config> #include <__iterator/concepts.h> #include <__iterator/counted_iterator.h> @@ -16,10 +17,7 @@ #include <__iterator/incrementable_traits.h> #include <__iterator/iterator_traits.h> #include <__memory/pointer_traits.h> -#include <__ranges/concepts.h> #include <__ranges/subrange.h> -#include <__utility/decay_copy.h> -#include <__utility/declval.h> #include <__utility/forward.h> #include <__utility/move.h> #include <span> @@ -36,50 +34,39 @@ _LIBCPP_BEGIN_NAMESPACE_STD namespace ranges::views { namespace __counted { - template<class _From, class _To> - concept __explicitly_convertible = requires { - _To(_From{}); - }; struct __fn { - template<class _Iter, class _Diff> - requires contiguous_iterator<decay_t<_Iter>> && - __explicitly_convertible<_Diff, iter_difference_t<_Iter>> + template<contiguous_iterator _It> _LIBCPP_HIDE_FROM_ABI - constexpr auto operator()(_Iter&& __it, _Diff __c) const - noexcept(noexcept( - span(_VSTD::to_address(__it), static_cast<iter_difference_t<_Iter>>(__c)) - )) - { - return span(_VSTD::to_address(__it), static_cast<iter_difference_t<_Iter>>(__c)); - } - - template<class _Iter, class _Diff> - requires random_access_iterator<decay_t<_Iter>> && - __explicitly_convertible<_Diff, iter_difference_t<_Iter>> + static constexpr auto __go(_It __it, iter_difference_t<_It> __count) + noexcept(noexcept(span(_VSTD::to_address(__it), static_cast<size_t>(__count)))) + // Deliberately omit return-type SFINAE, because to_address is not SFINAE-friendly + { return span(_VSTD::to_address(__it), static_cast<size_t>(__count)); } + + template<random_access_iterator _It> _LIBCPP_HIDE_FROM_ABI - constexpr auto operator()(_Iter&& __it, _Diff __c) const - noexcept( - noexcept(__it + static_cast<iter_difference_t<_Iter>>(__c)) && - noexcept(ranges::subrange(_VSTD::forward<_Iter>(__it), _VSTD::__decay_copy(__it))) - ) - { - auto __last = __it + static_cast<iter_difference_t<_Iter>>(__c); - return ranges::subrange(_VSTD::forward<_Iter>(__it), _VSTD::move(__last)); - } - - template<class _Iter, class _Diff> - requires __explicitly_convertible<_Diff, iter_difference_t<_Iter>> + static constexpr auto __go(_It __it, iter_difference_t<_It> __count) + noexcept(noexcept(subrange(__it, __it + __count))) + -> decltype( subrange(__it, __it + __count)) + { return subrange(__it, __it + __count); } + + template<class _It> _LIBCPP_HIDE_FROM_ABI - constexpr auto operator()(_Iter&& __it, _Diff __c) const - noexcept(noexcept( - ranges::subrange(counted_iterator(_VSTD::forward<_Iter>(__it), __c), default_sentinel) - )) - { - return ranges::subrange(counted_iterator(_VSTD::forward<_Iter>(__it), __c), default_sentinel); - } + static constexpr auto __go(_It __it, iter_difference_t<_It> __count) + noexcept(noexcept(subrange(counted_iterator(_VSTD::move(__it), __count), default_sentinel))) + -> decltype( subrange(counted_iterator(_VSTD::move(__it), __count), default_sentinel)) + { return subrange(counted_iterator(_VSTD::move(__it), __count), default_sentinel); } + + template<class _It, convertible_to<iter_difference_t<_It>> _Diff> + requires input_or_output_iterator<decay_t<_It>> + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI + constexpr auto operator()(_It&& __it, _Diff&& __count) const + noexcept(noexcept(__go(_VSTD::forward<_It>(__it), _VSTD::forward<_Diff>(__count)))) + -> decltype( __go(_VSTD::forward<_It>(__it), _VSTD::forward<_Diff>(__count))) + { return __go(_VSTD::forward<_It>(__it), _VSTD::forward<_Diff>(__count)); } }; -} + +} // namespace __counted inline namespace __cpo { inline constexpr auto counted = __counted::__fn{}; diff --git a/libcxx/include/__ranges/data.h b/libcxx/include/__ranges/data.h index 7eade494cceb..cc151c59f3d7 100644 --- a/libcxx/include/__ranges/data.h +++ b/libcxx/include/__ranges/data.h @@ -26,9 +26,9 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if !defined(_LIBCPP_HAS_NO_RANGES) -// clang-format off -namespace ranges { // [range.prim.data] + +namespace ranges { namespace __data { template <class _Tp> concept __ptr_to_object = is_pointer_v<_Tp> && is_object_v<remove_pointer_t<_Tp>>; @@ -65,15 +65,13 @@ namespace __data { return _VSTD::to_address(ranges::begin(_VSTD::forward<_Tp>(__t))); } }; -} // end namespace __data +} inline namespace __cpo { inline constexpr auto data = __data::__fn{}; } // namespace __cpo } // namespace ranges -// clang-format off - #endif // !defined(_LIBCPP_HAS_NO_RANGES) _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/__ranges/empty.h b/libcxx/include/__ranges/empty.h index fc6a938fd86e..e8a8aabf4aed 100644 --- a/libcxx/include/__ranges/empty.h +++ b/libcxx/include/__ranges/empty.h @@ -13,7 +13,6 @@ #include <__iterator/concepts.h> #include <__ranges/access.h> #include <__ranges/size.h> -#include <__utility/forward.h> #include <type_traits> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) @@ -24,19 +23,19 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if !defined(_LIBCPP_HAS_NO_RANGES) -// clang-format off -namespace ranges { // [range.prim.empty] + +namespace ranges { namespace __empty { template <class _Tp> concept __member_empty = requires(_Tp&& __t) { - bool(_VSTD::forward<_Tp>(__t).empty()); + bool(__t.empty()); }; template<class _Tp> concept __can_invoke_size = !__member_empty<_Tp> && - requires(_Tp&& __t) { ranges::size(_VSTD::forward<_Tp>(__t)); }; + requires(_Tp&& __t) { ranges::size(__t); }; template <class _Tp> concept __can_compare_begin_end = @@ -51,13 +50,13 @@ namespace __empty { template <__member_empty _Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t) const noexcept(noexcept(bool(__t.empty()))) { - return __t.empty(); + return bool(__t.empty()); } template <__can_invoke_size _Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(_Tp&& __t) const - noexcept(noexcept(ranges::size(_VSTD::forward<_Tp>(__t)))) { - return ranges::size(_VSTD::forward<_Tp>(__t)) == 0; + noexcept(noexcept(ranges::size(__t))) { + return ranges::size(__t) == 0; } template<__can_compare_begin_end _Tp> @@ -72,7 +71,6 @@ inline namespace __cpo { inline constexpr auto empty = __empty::__fn{}; } // namespace __cpo } // namespace ranges -// clang-format off #endif // !defined(_LIBCPP_HAS_NO_RANGES) diff --git a/libcxx/include/__ranges/size.h b/libcxx/include/__ranges/size.h index af0a8479f2ec..fc6641cf4887 100644 --- a/libcxx/include/__ranges/size.h +++ b/libcxx/include/__ranges/size.h @@ -13,8 +13,7 @@ #include <__iterator/concepts.h> #include <__iterator/iterator_traits.h> #include <__ranges/access.h> -#include <__utility/decay_copy.h> -#include <__utility/forward.h> +#include <__utility/auto_cast.h> #include <concepts> #include <type_traits> @@ -26,12 +25,14 @@ _LIBCPP_BEGIN_NAMESPACE_STD #if !defined(_LIBCPP_HAS_NO_RANGES) -// clang-format off namespace ranges { -template<class> -inline constexpr bool disable_sized_range = false; + template<class> + inline constexpr bool disable_sized_range = false; +} // [range.prim.size] + +namespace ranges { namespace __size { void size(auto&) = delete; void size(const auto&) = delete; @@ -41,7 +42,7 @@ namespace __size { template <class _Tp> concept __member_size = __size_enabled<_Tp> && requires(_Tp&& __t) { - { _VSTD::__decay_copy(_VSTD::forward<_Tp>(__t).size()) } -> __integer_like; + { _LIBCPP_AUTO_CAST(__t.size()) } -> __integer_like; }; template <class _Tp> @@ -50,7 +51,7 @@ namespace __size { !__member_size<_Tp> && __class_or_enum<remove_cvref_t<_Tp>> && requires(_Tp&& __t) { - { _VSTD::__decay_copy(size(_VSTD::forward<_Tp>(__t))) } -> __integer_like; + { _LIBCPP_AUTO_CAST(size(__t)) } -> __integer_like; }; template <class _Tp> @@ -76,14 +77,14 @@ namespace __size { template <__member_size _Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr __integer_like auto operator()(_Tp&& __t) const - noexcept(noexcept(_VSTD::forward<_Tp>(__t).size())) { - return _VSTD::forward<_Tp>(__t).size(); + noexcept(noexcept(_LIBCPP_AUTO_CAST(__t.size()))) { + return _LIBCPP_AUTO_CAST(__t.size()); } template <__unqualified_size _Tp> [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr __integer_like auto operator()(_Tp&& __t) const - noexcept(noexcept(size(_VSTD::forward<_Tp>(__t)))) { - return size(_VSTD::forward<_Tp>(__t)); + noexcept(noexcept(_LIBCPP_AUTO_CAST(size(__t)))) { + return _LIBCPP_AUTO_CAST(size(__t)); } template<__difference _Tp> @@ -92,18 +93,23 @@ namespace __size { return _VSTD::__to_unsigned_like(ranges::end(__t) - ranges::begin(__t)); } }; -} // end namespace __size +} inline namespace __cpo { inline constexpr auto size = __size::__fn{}; } // namespace __cpo +} // namespace ranges + +// [range.prim.ssize] +namespace ranges { namespace __ssize { struct __fn { template<class _Tp> requires requires (_Tp&& __t) { ranges::size(__t); } [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr integral auto operator()(_Tp&& __t) const - noexcept(noexcept(ranges::size(__t))) { + noexcept(noexcept(ranges::size(__t))) + { using _Signed = make_signed_t<decltype(ranges::size(__t))>; if constexpr (sizeof(ptrdiff_t) > sizeof(_Signed)) return static_cast<ptrdiff_t>(ranges::size(__t)); @@ -118,8 +124,6 @@ inline namespace __cpo { } // namespace __cpo } // namespace ranges -// clang-format off - #endif // !defined(_LIBCPP_HAS_NO_RANGES) _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/__ranges/subrange.h b/libcxx/include/__ranges/subrange.h index af4e27600625..8e984f2bf06c 100644 --- a/libcxx/include/__ranges/subrange.h +++ b/libcxx/include/__ranges/subrange.h @@ -91,14 +91,14 @@ namespace ranges { _LIBCPP_HIDE_FROM_ABI constexpr subrange(__convertible_to_non_slicing<_Iter> auto __iter, _Sent __sent) requires _MustProvideSizeAtConstruction - : __begin_(_VSTD::move(__iter)), __end_(std::move(__sent)) + : __begin_(_VSTD::move(__iter)), __end_(_VSTD::move(__sent)) { } _LIBCPP_HIDE_FROM_ABI constexpr subrange(__convertible_to_non_slicing<_Iter> auto __iter, _Sent __sent, make_unsigned_t<iter_difference_t<_Iter>> __n) requires (_Kind == subrange_kind::sized) - : __begin_(_VSTD::move(__iter)), __end_(std::move(__sent)), __size_(__n) + : __begin_(_VSTD::move(__iter)), __end_(_VSTD::move(__sent)), __size_(__n) { if constexpr (sized_sentinel_for<_Sent, _Iter>) _LIBCPP_ASSERT((__end_ - __begin_) == static_cast<iter_difference_t<_Iter>>(__n), diff --git a/libcxx/include/__ranges/transform_view.h b/libcxx/include/__ranges/transform_view.h index 208a9a22694a..0f53fbaa7e68 100644 --- a/libcxx/include/__ranges/transform_view.h +++ b/libcxx/include/__ranges/transform_view.h @@ -46,11 +46,15 @@ _LIBCPP_BEGIN_NAMESPACE_STD namespace ranges { +template<class _Fn, class _View> +concept __regular_invocable_with_range_ref = + regular_invocable<_Fn, range_reference_t<_View>>; + template<class _View, class _Fn> concept __transform_view_constraints = - view<_View> && is_object_v<_Fn> && - regular_invocable<_Fn&, range_reference_t<_View>> && - __referenceable<invoke_result_t<_Fn&, range_reference_t<_View>>>; + view<_View> && is_object_v<_Fn> && + regular_invocable<_Fn&, range_reference_t<_View>> && + __referenceable<invoke_result_t<_Fn&, range_reference_t<_View>>>; template<input_range _View, copy_constructible _Fn> requires __transform_view_constraints<_View, _Fn> @@ -82,7 +86,7 @@ public: _LIBCPP_HIDE_FROM_ABI constexpr __iterator<true> begin() const requires range<const _View> && - regular_invocable<const _Fn&, range_reference_t<const _View>> + __regular_invocable_with_range_ref<const _Fn&, const _View> { return __iterator<true>(*this, ranges::begin(__base_)); } @@ -100,14 +104,14 @@ public: _LIBCPP_HIDE_FROM_ABI constexpr __sentinel<true> end() const requires range<const _View> && - regular_invocable<const _Fn&, range_reference_t<const _View>> + __regular_invocable_with_range_ref<const _Fn&, const _View> { return __sentinel<true>(ranges::end(__base_)); } _LIBCPP_HIDE_FROM_ABI constexpr __iterator<true> end() const requires common_range<const _View> && - regular_invocable<const _Fn&, range_reference_t<const _View>> + __regular_invocable_with_range_ref<const _Fn&, const _View> { return __iterator<true>(*this, ranges::end(__base_)); } diff --git a/libcxx/include/__string b/libcxx/include/__string index 890fb21dd3f1..13ff7b35e47d 100644 --- a/libcxx/include/__string +++ b/libcxx/include/__string @@ -42,9 +42,6 @@ _LIBCPP_PUSH_MACROS _LIBCPP_BEGIN_NAMESPACE_STD -// The the extern template ABI lists are kept outside of <string> to improve the -// readability of that header. - // The extern template ABI lists are kept outside of <string> to improve the // readability of that header. We maintain 2 ABI lists: // - _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST @@ -293,31 +290,34 @@ char_traits<_CharT>::assign(char_type* __s, size_t __n, char_type __a) template <class _CharT> static inline _LIBCPP_CONSTEXPR_AFTER_CXX17 -_CharT* __move_constexpr(_CharT* __s1, const _CharT* __s2, size_t __n) _NOEXCEPT +_CharT* __copy_constexpr(_CharT* __dest, const _CharT* __source, size_t __n) _NOEXCEPT { - if (__n == 0) return __s1; - if (__s1 < __s2) { - _VSTD::copy(__s2, __s2 + __n, __s1); - } else if (__s2 < __s1) { - _VSTD::copy_backward(__s2, __s2 + __n, __s1 + __n); - } - return __s1; + _LIBCPP_ASSERT(__libcpp_is_constant_evaluated(), "__copy_constexpr() should always be constant evaluated"); + _VSTD::copy_n(__source, __n, __dest); + return __dest; } template <class _CharT> static inline _LIBCPP_CONSTEXPR_AFTER_CXX17 -_CharT* __copy_constexpr(_CharT* __s1, const _CharT* __s2, size_t __n) _NOEXCEPT +_CharT* __move_constexpr(_CharT* __dest, const _CharT* __source, size_t __n) _NOEXCEPT { - _VSTD::copy_n(__s2, __n, __s1); - return __s1; + _LIBCPP_ASSERT(__libcpp_is_constant_evaluated(), "__move_constexpr() should always be constant evaluated"); + if (__n == 0) + return __dest; + _CharT* __allocation = new _CharT[__n]; + _VSTD::__copy_constexpr(__allocation, __source, __n); + _VSTD::__copy_constexpr(__dest, static_cast<const _CharT*>(__allocation), __n); + delete[] __allocation; + return __dest; } template <class _CharT> static inline _LIBCPP_CONSTEXPR_AFTER_CXX17 _CharT* __assign_constexpr(_CharT* __s, size_t __n, _CharT __a) _NOEXCEPT { - _VSTD::fill_n(__s, __n, __a); - return __s; + _LIBCPP_ASSERT(__libcpp_is_constant_evaluated(), "__assign_constexpr() should always be constant evaluated"); + _VSTD::fill_n(__s, __n, __a); + return __s; } // char_traits<char> @@ -340,8 +340,21 @@ struct _LIBCPP_TEMPLATE_VIS char_traits<char> static _LIBCPP_CONSTEXPR_AFTER_CXX14 int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT; - static inline size_t _LIBCPP_CONSTEXPR_AFTER_CXX14 - length(const char_type* __s) _NOEXCEPT {return __builtin_strlen(__s);} + + static inline size_t _LIBCPP_CONSTEXPR_AFTER_CXX14 length(const char_type* __s) _NOEXCEPT { + // GCC currently does not support __builtin_strlen during constant evaluation. + // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70816 +#ifdef _LIBCPP_COMPILER_GCC + if (__libcpp_is_constant_evaluated()) { + size_t __i = 0; + for (; __s[__i] != char_type('\0'); ++__i) + ; + return __i; + } +#endif + return __builtin_strlen(__s); + } + static _LIBCPP_CONSTEXPR_AFTER_CXX14 const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT; static inline _LIBCPP_CONSTEXPR_AFTER_CXX17 diff --git a/libcxx/include/__threading_support b/libcxx/include/__threading_support index 0094fca2fb38..68f381a62183 100644 --- a/libcxx/include/__threading_support +++ b/libcxx/include/__threading_support @@ -274,7 +274,8 @@ struct __libcpp_timed_backoff_policy { namespace __thread_detail { -inline __libcpp_timespec_t __convert_to_timespec(const chrono::nanoseconds& __ns) +_LIBCPP_HIDE_FROM_ABI inline +__libcpp_timespec_t __convert_to_timespec(const chrono::nanoseconds& __ns) { using namespace chrono; seconds __s = duration_cast<seconds>(__ns); @@ -296,10 +297,11 @@ inline __libcpp_timespec_t __convert_to_timespec(const chrono::nanoseconds& __ns return __ts; } -} +} // namespace __thread_detail #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m) { pthread_mutexattr_t attr; @@ -324,74 +326,88 @@ int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m) return 0; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m) { return pthread_mutex_lock(__m); } +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m) { return pthread_mutex_trylock(__m) == 0; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m) { return pthread_mutex_unlock(__m); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m) { return pthread_mutex_destroy(__m); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_mutex_lock(__libcpp_mutex_t *__m) { return pthread_mutex_lock(__m); } +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m) { return pthread_mutex_trylock(__m) == 0; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_mutex_unlock(__libcpp_mutex_t *__m) { return pthread_mutex_unlock(__m); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_mutex_destroy(__libcpp_mutex_t *__m) { return pthread_mutex_destroy(__m); } // Condition Variable +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_signal(__libcpp_condvar_t *__cv) { return pthread_cond_signal(__cv); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv) { return pthread_cond_broadcast(__cv); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m) { return pthread_cond_wait(__cv, __m); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m, __libcpp_timespec_t *__ts) { return pthread_cond_timedwait(__cv, __m, __ts); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv) { return pthread_cond_destroy(__cv); } // Execute once +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_execute_once(__libcpp_exec_once_flag *flag, void (*init_routine)()) { return pthread_once(flag, init_routine); @@ -399,34 +415,40 @@ int __libcpp_execute_once(__libcpp_exec_once_flag *flag, // Thread id // Returns non-zero if the thread ids are equal, otherwise 0 +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2) { return t1 == t2; } // Returns non-zero if t1 < t2, otherwise 0 +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2) { return t1 < t2; } // Thread +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) { return __libcpp_thread_get_id(__t) == 0; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *), void *__arg) { return pthread_create(__t, nullptr, __func, __arg); } +_LIBCPP_HIDE_FROM_ABI inline __libcpp_thread_id __libcpp_thread_get_current_id() { const __libcpp_thread_t thread = pthread_self(); return __libcpp_thread_get_id(&thread); } +_LIBCPP_HIDE_FROM_ABI inline __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t) { #if defined(__MVS__) @@ -436,21 +458,25 @@ __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t) #endif } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_thread_join(__libcpp_thread_t *__t) { return pthread_join(*__t, nullptr); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_thread_detach(__libcpp_thread_t *__t) { return pthread_detach(*__t); } +_LIBCPP_HIDE_FROM_ABI inline void __libcpp_thread_yield() { sched_yield(); } +_LIBCPP_HIDE_FROM_ABI inline void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns) { __libcpp_timespec_t __ts = __thread_detail::__convert_to_timespec(__ns); @@ -458,16 +484,19 @@ void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns) } // Thread local storage +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *)) { return pthread_key_create(__key, __at_exit); } +_LIBCPP_HIDE_FROM_ABI inline void *__libcpp_tls_get(__libcpp_tls_key __key) { return pthread_getspecific(__key); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_tls_set(__libcpp_tls_key __key, void *__p) { return pthread_setspecific(__key, __p); @@ -475,47 +504,56 @@ int __libcpp_tls_set(__libcpp_tls_key __key, void *__p) #elif defined(_LIBCPP_HAS_THREAD_API_C11) +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m) { return mtx_init(__m, mtx_plain | mtx_recursive) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m) { return mtx_lock(__m) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m) { return mtx_trylock(__m) == thrd_success; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m) { return mtx_unlock(__m) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m) { mtx_destroy(__m); return 0; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_mutex_lock(__libcpp_mutex_t *__m) { return mtx_lock(__m) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m) { return mtx_trylock(__m) == thrd_success; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_mutex_unlock(__libcpp_mutex_t *__m) { return mtx_unlock(__m) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_mutex_destroy(__libcpp_mutex_t *__m) { mtx_destroy(__m); @@ -523,21 +561,25 @@ int __libcpp_mutex_destroy(__libcpp_mutex_t *__m) } // Condition Variable +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_signal(__libcpp_condvar_t *__cv) { return cnd_signal(__cv) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv) { return cnd_broadcast(__cv) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m) { return cnd_wait(__cv, __m) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m, timespec *__ts) { @@ -545,6 +587,7 @@ int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m, return __ec == thrd_timedout ? ETIMEDOUT : __ec; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv) { cnd_destroy(__cv); @@ -552,6 +595,7 @@ int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv) } // Execute once +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_execute_once(__libcpp_exec_once_flag *flag, void (*init_routine)(void)) { ::call_once(flag, init_routine); @@ -560,22 +604,26 @@ int __libcpp_execute_once(__libcpp_exec_once_flag *flag, // Thread id // Returns non-zero if the thread ids are equal, otherwise 0 +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2) { return thrd_equal(t1, t2) != 0; } // Returns non-zero if t1 < t2, otherwise 0 +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2) { return t1 < t2; } // Thread +_LIBCPP_HIDE_FROM_ABI inline bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) { return __libcpp_thread_get_id(__t) == 0; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *), void *__arg) { @@ -583,31 +631,37 @@ int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *), return __ec == thrd_nomem ? ENOMEM : __ec; } +_LIBCPP_HIDE_FROM_ABI inline __libcpp_thread_id __libcpp_thread_get_current_id() { return thrd_current(); } +_LIBCPP_HIDE_FROM_ABI inline __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t) { return *__t; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_thread_join(__libcpp_thread_t *__t) { return thrd_join(*__t, nullptr) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_thread_detach(__libcpp_thread_t *__t) { return thrd_detach(*__t) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline void __libcpp_thread_yield() { thrd_yield(); } +_LIBCPP_HIDE_FROM_ABI inline void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns) { __libcpp_timespec_t __ts = __thread_detail::__convert_to_timespec(__ns); @@ -615,16 +669,19 @@ void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns) } // Thread local storage +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *)) { return tss_create(__key, __at_exit) == thrd_success ? 0 : EINVAL; } +_LIBCPP_HIDE_FROM_ABI inline void *__libcpp_tls_get(__libcpp_tls_key __key) { return tss_get(__key); } +_LIBCPP_HIDE_FROM_ABI inline int __libcpp_tls_set(__libcpp_tls_key __key, void *__p) { return tss_set(__key, __p) == thrd_success ? 0 : EINVAL; @@ -643,7 +700,7 @@ namespace this_thread _LIBCPP_INLINE_VISIBILITY __thread_id get_id() _NOEXCEPT; -} // this_thread +} // namespace this_thread template<> struct hash<__thread_id>; @@ -713,7 +770,7 @@ get_id() _NOEXCEPT return __libcpp_thread_get_current_id(); } -} // this_thread +} // namespace this_thread #endif // !_LIBCPP_HAS_NO_THREADS diff --git a/libcxx/include/__tuple b/libcxx/include/__tuple index 11fbba260238..e8eb0b3aaf0c 100644 --- a/libcxx/include/__tuple +++ b/libcxx/include/__tuple @@ -387,7 +387,7 @@ template <bool ..._Preds> struct __all_dummy; template <bool ..._Pred> -using __all = _IsSame<__all_dummy<_Pred...>, __all_dummy<((void)_Pred, true)...>>; +struct __all : _IsSame<__all_dummy<_Pred...>, __all_dummy<((void)_Pred, true)...>> {}; struct __tuple_sfinae_base { template <template <class, class...> class _Trait, diff --git a/libcxx/include/__utility/decay_copy.h b/libcxx/include/__utility/auto_cast.h index 5c9716a89279..5c368e077508 100644 --- a/libcxx/include/__utility/decay_copy.h +++ b/libcxx/include/__utility/auto_cast.h @@ -7,29 +7,16 @@ // //===----------------------------------------------------------------------===// -#ifndef _LIBCPP___UTILITY_DECAY_COPY_H -#define _LIBCPP___UTILITY_DECAY_COPY_H +#ifndef _LIBCPP___UTILITY_AUTO_CAST_H +#define _LIBCPP___UTILITY_AUTO_CAST_H #include <__config> -#include <__utility/forward.h> #include <type_traits> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) #pragma GCC system_header #endif -_LIBCPP_BEGIN_NAMESPACE_STD +#define _LIBCPP_AUTO_CAST(expr) static_cast<typename decay<decltype((expr))>::type>(expr) -template <class _Tp> -_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR -typename decay<_Tp>::type __decay_copy(_Tp&& __t) -#if _LIBCPP_STD_VER > 17 - noexcept(is_nothrow_convertible_v<_Tp, remove_reference_t<_Tp>>) -#endif -{ - return _VSTD::forward<_Tp>(__t); -} - -_LIBCPP_END_NAMESPACE_STD - -#endif // _LIBCPP___UTILITY_DECAY_COPY_H +#endif // _LIBCPP___UTILITY_AUTO_CAST_H diff --git a/libcxx/include/__utility/rel_ops.h b/libcxx/include/__utility/rel_ops.h index c94b8fddafee..d59e96d72dc1 100644 --- a/libcxx/include/__utility/rel_ops.h +++ b/libcxx/include/__utility/rel_ops.h @@ -55,7 +55,7 @@ operator>=(const _Tp& __x, const _Tp& __y) return !(__x < __y); } -} // rel_ops +} // namespace rel_ops _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/__utility/transaction.h b/libcxx/include/__utility/transaction.h new file mode 100644 index 000000000000..5bc3a500fdc5 --- /dev/null +++ b/libcxx/include/__utility/transaction.h @@ -0,0 +1,91 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP___UTILITY_TRANSACTION_H +#define _LIBCPP___UTILITY_TRANSACTION_H + +#include <__config> +#include <__utility/exchange.h> +#include <__utility/move.h> +#include <type_traits> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +// __transaction is a helper class for writing code with the strong exception guarantee. +// +// When writing code that can throw an exception, one can store rollback instructions in a +// transaction so that if an exception is thrown at any point during the lifetime of the +// transaction, it will be rolled back automatically. When the transaction is done, one +// must mark it as being complete so it isn't rolled back when the transaction is destroyed. +// +// Transactions are not default constructible, they can't be copied or assigned to, but +// they can be moved around for convenience. +// +// __transaction can help greatly simplify code that would normally be cluttered by +// `#if _LIBCPP_NO_EXCEPTIONS`. For example: +// +// template <class Iterator, class Size, class OutputIterator> +// Iterator uninitialized_copy_n(Iterator iter, Size n, OutputIterator out) { +// typedef typename iterator_traits<Iterator>::value_type value_type; +// __transaction transaction([start=out, &out] { +// std::destroy(start, out); +// }); +// +// for (; n > 0; ++iter, ++out, --n) { +// ::new ((void*)std::addressof(*out)) value_type(*iter); +// } +// transaction.__complete(); +// return out; +// } +// +template <class _Rollback> +struct __transaction { + __transaction() = delete; + + _LIBCPP_HIDE_FROM_ABI + _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit __transaction(_Rollback __rollback) + : __rollback_(_VSTD::move(__rollback)) + , __completed_(false) + { } + + _LIBCPP_HIDE_FROM_ABI + _LIBCPP_CONSTEXPR_AFTER_CXX17 __transaction(__transaction&& __other) + _NOEXCEPT_(is_nothrow_move_constructible<_Rollback>::value) + : __rollback_(_VSTD::move(__other.__rollback_)) + , __completed_(__other.__completed_) + { + __other.__completed_ = true; + } + + __transaction(__transaction const&) = delete; + __transaction& operator=(__transaction const&) = delete; + __transaction& operator=(__transaction&&) = delete; + + _LIBCPP_HIDE_FROM_ABI + _LIBCPP_CONSTEXPR_AFTER_CXX17 void __complete() _NOEXCEPT { + __completed_ = true; + } + + _LIBCPP_HIDE_FROM_ABI + _LIBCPP_CONSTEXPR_AFTER_CXX17 ~__transaction() { + if (!__completed_) + __rollback_(); + } + +private: + _Rollback __rollback_; + bool __completed_; +}; + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP___UTILITY_TRANSACTION_H diff --git a/libcxx/include/atomic b/libcxx/include/atomic index cfd0e1d054a8..4b60d4d6802b 100644 --- a/libcxx/include/atomic +++ b/libcxx/include/atomic @@ -1443,7 +1443,7 @@ struct __cxx_atomic_impl : public _Base { static_assert(is_trivially_copyable<_Tp>::value, "std::atomic<T> requires that 'T' be a trivially copyable type"); - _LIBCPP_INLINE_VISIBILITY __cxx_atomic_impl() _NOEXCEPT _LIBCPP_DEFAULT + _LIBCPP_INLINE_VISIBILITY __cxx_atomic_impl() _NOEXCEPT = default; _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR explicit __cxx_atomic_impl(_Tp value) _NOEXCEPT : _Base(value) {} }; @@ -1644,7 +1644,7 @@ struct __atomic_base // false __atomic_base() noexcept(is_nothrow_default_constructible_v<_Tp>) : __a_(_Tp()) {} #else _LIBCPP_INLINE_VISIBILITY - __atomic_base() _NOEXCEPT _LIBCPP_DEFAULT + __atomic_base() _NOEXCEPT = default; #endif _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR @@ -1673,7 +1673,7 @@ struct __atomic_base<_Tp, true> typedef __atomic_base<_Tp, false> __base; _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 - __atomic_base() _NOEXCEPT _LIBCPP_DEFAULT + __atomic_base() _NOEXCEPT = default; _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __base(__d) {} @@ -1762,7 +1762,7 @@ struct atomic atomic() = default; #else _LIBCPP_INLINE_VISIBILITY - atomic() _NOEXCEPT _LIBCPP_DEFAULT + atomic() _NOEXCEPT = default; #endif _LIBCPP_INLINE_VISIBILITY @@ -1790,7 +1790,7 @@ struct atomic<_Tp*> typedef ptrdiff_t difference_type; _LIBCPP_INLINE_VISIBILITY - atomic() _NOEXCEPT _LIBCPP_DEFAULT + atomic() _NOEXCEPT = default; _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR atomic(_Tp* __d) _NOEXCEPT : __base(__d) {} @@ -2432,7 +2432,7 @@ typedef struct atomic_flag atomic_flag() _NOEXCEPT : __a_(false) {} #else _LIBCPP_INLINE_VISIBILITY - atomic_flag() _NOEXCEPT _LIBCPP_DEFAULT + atomic_flag() _NOEXCEPT = default; #endif _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR @@ -2699,6 +2699,13 @@ typedef atomic<__libcpp_unsigned_lock_free> atomic_unsigned_lock_free; #define ATOMIC_FLAG_INIT {false} #define ATOMIC_VAR_INIT(__v) {__v} +#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) +# if defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1400 +# pragma clang deprecated(ATOMIC_FLAG_INIT) +# pragma clang deprecated(ATOMIC_VAR_INIT) +# endif +#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) + _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP_ATOMIC diff --git a/libcxx/include/bit b/libcxx/include/bit index 0aab83e7a6eb..57a13768c493 100644 --- a/libcxx/include/bit +++ b/libcxx/include/bit @@ -308,7 +308,7 @@ bit_ceil(_Tp __t) noexcept { if (__t < 2) return 1; const unsigned __n = numeric_limits<_Tp>::digits - countl_zero((_Tp)(__t - 1u)); - _LIBCPP_DEBUG_ASSERT(__libcpp_is_constant_evaluated() || __n != numeric_limits<_Tp>::digits, "Bad input to bit_ceil"); + _LIBCPP_ASSERT(__n != numeric_limits<_Tp>::digits, "Bad input to bit_ceil"); if constexpr (sizeof(_Tp) >= sizeof(unsigned)) return _Tp{1} << __n; diff --git a/libcxx/include/charconv b/libcxx/include/charconv index 3c969dc79ab0..06634fe7bc39 100644 --- a/libcxx/include/charconv +++ b/libcxx/include/charconv @@ -105,7 +105,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD namespace __itoa { _LIBCPP_AVAILABILITY_TO_CHARS _LIBCPP_FUNC_VIS char* __u64toa(uint64_t __value, char* __buffer) _NOEXCEPT; _LIBCPP_AVAILABILITY_TO_CHARS _LIBCPP_FUNC_VIS char* __u32toa(uint32_t __value, char* __buffer) _NOEXCEPT; -} +} // namespace __itoa #ifndef _LIBCPP_CXX03_LANG @@ -598,6 +598,38 @@ from_chars(const char* __first, const char* __last, _Tp& __value, int __base) return __from_chars_integral(__first, __last, __value, __base); } +// Floating-point implementation starts here. +// Unlike the other parts of charconv this is only available in C++17 and newer. +#if _LIBCPP_STD_VER > 14 + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, float __value); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, double __value); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, long double __value); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision); + +_LIBCPP_AVAILABILITY_TO_CHARS_FLOATING_POINT _LIBCPP_FUNC_VIS +to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision); + +# endif // _LIBCPP_STD_VER > 14 #endif // _LIBCPP_CXX03_LANG _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/chrono b/libcxx/include/chrono index d29734f6c358..90c9b0829a1f 100644 --- a/libcxx/include/chrono +++ b/libcxx/include/chrono @@ -738,7 +738,7 @@ struct __is_duration<volatile duration<_Rep, _Period> > : true_type {}; template <class _Rep, class _Period> struct __is_duration<const volatile duration<_Rep, _Period> > : true_type {}; -} // chrono +} // namespace chrono template <class _Rep1, class _Period1, class _Rep2, class _Period2> struct _LIBCPP_TEMPLATE_VIS common_type<chrono::duration<_Rep1, _Period1>, @@ -1265,7 +1265,7 @@ public: _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR time_point max() _NOEXCEPT {return time_point(duration::max());} }; -} // chrono +} // namespace chrono template <class _Clock, class _Duration1, class _Duration2> struct _LIBCPP_TEMPLATE_VIS common_type<chrono::time_point<_Clock, _Duration1>, @@ -2701,7 +2701,7 @@ constexpr hours make24(const hours& __h, bool __is_pm) noexcept } #endif // _LIBCPP_STD_VER > 17 -} // chrono +} // namespace chrono #if _LIBCPP_STD_VER > 11 // Suffixes for duration literals [time.duration.literals] @@ -2786,11 +2786,12 @@ inline namespace literals return chrono::year(static_cast<int>(__y)); } #endif -}} +} // namespace chrono_literals +} // namespace literals namespace chrono { // hoist the literals into namespace std::chrono using namespace literals::chrono_literals; -} +} // namespace chrono #endif diff --git a/libcxx/include/cmath b/libcxx/include/cmath index 3a7985f7d454..b5c332c81ad6 100644 --- a/libcxx/include/cmath +++ b/libcxx/include/cmath @@ -638,36 +638,6 @@ lerp(long double __a, long double __b, long double __t) _NOEXCEPT { return __ler #endif // _LIBCPP_STD_VER > 17 -template <class _IntT, class _FloatT, - bool _FloatBigger = (numeric_limits<_FloatT>::digits > numeric_limits<_IntT>::digits), - int _Bits = (numeric_limits<_IntT>::digits - numeric_limits<_FloatT>::digits)> -_LIBCPP_INLINE_VISIBILITY -_LIBCPP_CONSTEXPR _IntT __max_representable_int_for_float() _NOEXCEPT { - static_assert(is_floating_point<_FloatT>::value, "must be a floating point type"); - static_assert(is_integral<_IntT>::value, "must be an integral type"); - static_assert(numeric_limits<_FloatT>::radix == 2, "FloatT has incorrect radix"); - static_assert((_IsSame<_FloatT, float>::value || _IsSame<_FloatT, double>::value - || _IsSame<_FloatT,long double>::value), "unsupported floating point type"); - return _FloatBigger ? numeric_limits<_IntT>::max() : (numeric_limits<_IntT>::max() >> _Bits << _Bits); -} - -// Convert a floating point number to the specified integral type after -// clamping to the integral types representable range. -// -// The behavior is undefined if `__r` is NaN. -template <class _IntT, class _RealT> -_LIBCPP_INLINE_VISIBILITY -_IntT __clamp_to_integral(_RealT __r) _NOEXCEPT { - using _Lim = numeric_limits<_IntT>; - const _IntT _MaxVal = __max_representable_int_for_float<_IntT, _RealT>(); - if (__r >= ::nextafter(static_cast<_RealT>(_MaxVal), INFINITY)) { - return _Lim::max(); - } else if (__r <= _Lim::lowest()) { - return _Lim::min(); - } - return static_cast<_IntT>(__r); -} - _LIBCPP_END_NAMESPACE_STD _LIBCPP_POP_MACROS diff --git a/libcxx/include/compare b/libcxx/include/compare index 5c4578da0b89..5d07ebaf2fbd 100644 --- a/libcxx/include/compare +++ b/libcxx/include/compare @@ -146,4 +146,8 @@ namespace std { #include <__compare/weak_order.h> #include <__config> +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + #endif // _LIBCPP_COMPARE diff --git a/libcxx/include/complex b/libcxx/include/complex index 6b74435c6101..2dc58c010495 100644 --- a/libcxx/include/complex +++ b/libcxx/include/complex @@ -1485,8 +1485,8 @@ inline namespace literals { return { 0.0f, static_cast<float>(__im) }; } - } -} + } // namespace complex_literals +} // namespace literals #endif _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/exception b/libcxx/include/exception index 5f5486149ac0..886daac4439a 100644 --- a/libcxx/include/exception +++ b/libcxx/include/exception @@ -328,6 +328,6 @@ rethrow_if_nested(const _Ep&, { } -} // std +} // namespace std #endif // _LIBCPP_EXCEPTION diff --git a/libcxx/include/execution b/libcxx/include/execution index 32b05b85dac6..c1debcb72ff1 100644 --- a/libcxx/include/execution +++ b/libcxx/include/execution @@ -16,4 +16,8 @@ # include <__pstl_execution> #endif +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + #endif // _LIBCPP_EXECUTION diff --git a/libcxx/include/experimental/__memory b/libcxx/include/experimental/__memory index b38b664b339a..bd9bf95e5933 100644 --- a/libcxx/include/experimental/__memory +++ b/libcxx/include/experimental/__memory @@ -17,6 +17,10 @@ #include <__functional_base> #include <type_traits> +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + _LIBCPP_BEGIN_NAMESPACE_LFTS template < diff --git a/libcxx/include/experimental/iterator b/libcxx/include/experimental/iterator index 10c903832d8e..9da08a0cff9d 100644 --- a/libcxx/include/experimental/iterator +++ b/libcxx/include/experimental/iterator @@ -52,15 +52,18 @@ namespace std { */ -#include <experimental/__config> - -#if _LIBCPP_STD_VER > 11 - #include <__memory/addressof.h> #include <__utility/move.h> #include <__utility/forward.h> +#include <experimental/__config> #include <iterator> +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +#if _LIBCPP_STD_VER > 11 + _LIBCPP_BEGIN_NAMESPACE_LFTS template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>> @@ -111,6 +114,6 @@ make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _Delim && __d) _LIBCPP_END_NAMESPACE_LFTS -#endif /* _LIBCPP_STD_VER > 11 */ +#endif // _LIBCPP_STD_VER > 11 #endif // _LIBCPP_EXPERIMENTAL_ITERATOR diff --git a/libcxx/include/ext/__hash b/libcxx/include/ext/__hash index 268577f3c922..2f998ee40a93 100644 --- a/libcxx/include/ext/__hash +++ b/libcxx/include/ext/__hash @@ -129,6 +129,6 @@ template <> struct _LIBCPP_TEMPLATE_VIS hash<unsigned long> return __c; } }; -} +} // namespace __gnu_cxx #endif // _LIBCPP_EXT_HASH diff --git a/libcxx/include/ext/hash_map b/libcxx/include/ext/hash_map index 6c757e2fba3e..d6ea26c2cf86 100644 --- a/libcxx/include/ext/hash_map +++ b/libcxx/include/ext/hash_map @@ -979,6 +979,6 @@ operator!=(const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, return !(__x == __y); } -} // __gnu_cxx +} // namespace __gnu_cxx #endif // _LIBCPP_HASH_MAP diff --git a/libcxx/include/ext/hash_set b/libcxx/include/ext/hash_set index b61f5f1da448..7d19ccd006e2 100644 --- a/libcxx/include/ext/hash_set +++ b/libcxx/include/ext/hash_set @@ -205,6 +205,10 @@ template <class Value, class Hash, class Pred, class Alloc> #endif #endif +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + namespace __gnu_cxx { @@ -654,6 +658,6 @@ operator!=(const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x, return !(__x == __y); } -} // __gnu_cxx +} // namespace __gnu_cxx #endif // _LIBCPP_HASH_SET diff --git a/libcxx/include/filesystem b/libcxx/include/filesystem index 39e8ca2e814b..9f5b42747b34 100644 --- a/libcxx/include/filesystem +++ b/libcxx/include/filesystem @@ -238,31 +238,26 @@ inline constexpr bool std::ranges::enable_view<std::filesystem::recursive_direct */ -#include <__availability> #include <__config> -#include <__debug> -#include <__ranges/enable_borrowed_range.h> -#include <__ranges/enable_view.h> -#include <__utility/forward.h> -#include <chrono> +#include <__filesystem/copy_options.h> +#include <__filesystem/directory_entry.h> +#include <__filesystem/directory_iterator.h> +#include <__filesystem/directory_options.h> +#include <__filesystem/file_status.h> +#include <__filesystem/file_time_type.h> +#include <__filesystem/file_type.h> +#include <__filesystem/filesystem_error.h> +#include <__filesystem/operations.h> +#include <__filesystem/path_iterator.h> +#include <__filesystem/path.h> +#include <__filesystem/perm_options.h> +#include <__filesystem/perms.h> +#include <__filesystem/recursive_directory_iterator.h> +#include <__filesystem/space_info.h> +#include <__filesystem/u8path.h> #include <compare> -#include <cstddef> -#include <cstdlib> -#include <iosfwd> -#include <iterator> -#include <memory> -#include <stack> -#include <string> -#include <string_view> -#include <system_error> -#include <utility> #include <version> -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) -# include <locale> -# include <iomanip> // for quoted -#endif - #if defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) # error "The Filesystem library is not supported since libc++ has been configured with LIBCXX_ENABLE_FILESYSTEM disabled" #endif @@ -271,2775 +266,4 @@ inline constexpr bool std::ranges::enable_view<std::filesystem::recursive_direct #pragma GCC system_header #endif -_LIBCPP_PUSH_MACROS -#include <__undef_macros> - -#ifndef _LIBCPP_CXX03_LANG - -_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM - -_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH - -typedef chrono::time_point<_FilesystemClock> file_time_type; - -struct _LIBCPP_TYPE_VIS space_info { - uintmax_t capacity; - uintmax_t free; - uintmax_t available; -}; - -// On Windows, the library never identifies files as block, character, fifo -// or socket. -enum class _LIBCPP_ENUM_VIS file_type : signed char { - none = 0, - not_found = -1, - regular = 1, - directory = 2, - symlink = 3, - block = 4, - character = 5, - fifo = 6, - socket = 7, - unknown = 8 -}; - -// On Windows, these permission bits map to one single readonly flag per -// file, and the executable bit is always returned as set. When setting -// permissions, as long as the write bit is set for either owner, group or -// others, the readonly flag is cleared. -enum class _LIBCPP_ENUM_VIS perms : unsigned { - none = 0, - - owner_read = 0400, - owner_write = 0200, - owner_exec = 0100, - owner_all = 0700, - - group_read = 040, - group_write = 020, - group_exec = 010, - group_all = 070, - - others_read = 04, - others_write = 02, - others_exec = 01, - others_all = 07, - - all = 0777, - - set_uid = 04000, - set_gid = 02000, - sticky_bit = 01000, - mask = 07777, - unknown = 0xFFFF, -}; - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perms operator&(perms _LHS, perms _RHS) { - return static_cast<perms>(static_cast<unsigned>(_LHS) & - static_cast<unsigned>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perms operator|(perms _LHS, perms _RHS) { - return static_cast<perms>(static_cast<unsigned>(_LHS) | - static_cast<unsigned>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perms operator^(perms _LHS, perms _RHS) { - return static_cast<perms>(static_cast<unsigned>(_LHS) ^ - static_cast<unsigned>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perms operator~(perms _LHS) { - return static_cast<perms>(~static_cast<unsigned>(_LHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline perms& operator&=(perms& _LHS, perms _RHS) { return _LHS = _LHS & _RHS; } - -_LIBCPP_INLINE_VISIBILITY -inline perms& operator|=(perms& _LHS, perms _RHS) { return _LHS = _LHS | _RHS; } - -_LIBCPP_INLINE_VISIBILITY -inline perms& operator^=(perms& _LHS, perms _RHS) { return _LHS = _LHS ^ _RHS; } - -enum class _LIBCPP_ENUM_VIS perm_options : unsigned char { - replace = 1, - add = 2, - remove = 4, - nofollow = 8 -}; - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perm_options operator&(perm_options _LHS, perm_options _RHS) { - return static_cast<perm_options>(static_cast<unsigned>(_LHS) & - static_cast<unsigned>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perm_options operator|(perm_options _LHS, perm_options _RHS) { - return static_cast<perm_options>(static_cast<unsigned>(_LHS) | - static_cast<unsigned>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perm_options operator^(perm_options _LHS, perm_options _RHS) { - return static_cast<perm_options>(static_cast<unsigned>(_LHS) ^ - static_cast<unsigned>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr perm_options operator~(perm_options _LHS) { - return static_cast<perm_options>(~static_cast<unsigned>(_LHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline perm_options& operator&=(perm_options& _LHS, perm_options _RHS) { - return _LHS = _LHS & _RHS; -} - -_LIBCPP_INLINE_VISIBILITY -inline perm_options& operator|=(perm_options& _LHS, perm_options _RHS) { - return _LHS = _LHS | _RHS; -} - -_LIBCPP_INLINE_VISIBILITY -inline perm_options& operator^=(perm_options& _LHS, perm_options _RHS) { - return _LHS = _LHS ^ _RHS; -} - -enum class _LIBCPP_ENUM_VIS copy_options : unsigned short { - none = 0, - skip_existing = 1, - overwrite_existing = 2, - update_existing = 4, - recursive = 8, - copy_symlinks = 16, - skip_symlinks = 32, - directories_only = 64, - create_symlinks = 128, - create_hard_links = 256, - __in_recursive_copy = 512, -}; - -_LIBCPP_INLINE_VISIBILITY -inline constexpr copy_options operator&(copy_options _LHS, copy_options _RHS) { - return static_cast<copy_options>(static_cast<unsigned short>(_LHS) & - static_cast<unsigned short>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr copy_options operator|(copy_options _LHS, copy_options _RHS) { - return static_cast<copy_options>(static_cast<unsigned short>(_LHS) | - static_cast<unsigned short>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr copy_options operator^(copy_options _LHS, copy_options _RHS) { - return static_cast<copy_options>(static_cast<unsigned short>(_LHS) ^ - static_cast<unsigned short>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr copy_options operator~(copy_options _LHS) { - return static_cast<copy_options>(~static_cast<unsigned short>(_LHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline copy_options& operator&=(copy_options& _LHS, copy_options _RHS) { - return _LHS = _LHS & _RHS; -} - -_LIBCPP_INLINE_VISIBILITY -inline copy_options& operator|=(copy_options& _LHS, copy_options _RHS) { - return _LHS = _LHS | _RHS; -} - -_LIBCPP_INLINE_VISIBILITY -inline copy_options& operator^=(copy_options& _LHS, copy_options _RHS) { - return _LHS = _LHS ^ _RHS; -} - -enum class _LIBCPP_ENUM_VIS directory_options : unsigned char { - none = 0, - follow_directory_symlink = 1, - skip_permission_denied = 2 -}; - -_LIBCPP_INLINE_VISIBILITY -inline constexpr directory_options operator&(directory_options _LHS, - directory_options _RHS) { - return static_cast<directory_options>(static_cast<unsigned char>(_LHS) & - static_cast<unsigned char>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr directory_options operator|(directory_options _LHS, - directory_options _RHS) { - return static_cast<directory_options>(static_cast<unsigned char>(_LHS) | - static_cast<unsigned char>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr directory_options operator^(directory_options _LHS, - directory_options _RHS) { - return static_cast<directory_options>(static_cast<unsigned char>(_LHS) ^ - static_cast<unsigned char>(_RHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline constexpr directory_options operator~(directory_options _LHS) { - return static_cast<directory_options>(~static_cast<unsigned char>(_LHS)); -} - -_LIBCPP_INLINE_VISIBILITY -inline directory_options& operator&=(directory_options& _LHS, - directory_options _RHS) { - return _LHS = _LHS & _RHS; -} - -_LIBCPP_INLINE_VISIBILITY -inline directory_options& operator|=(directory_options& _LHS, - directory_options _RHS) { - return _LHS = _LHS | _RHS; -} - -_LIBCPP_INLINE_VISIBILITY -inline directory_options& operator^=(directory_options& _LHS, - directory_options _RHS) { - return _LHS = _LHS ^ _RHS; -} - -class _LIBCPP_TYPE_VIS file_status { -public: - // constructors - _LIBCPP_INLINE_VISIBILITY - file_status() noexcept : file_status(file_type::none) {} - _LIBCPP_INLINE_VISIBILITY - explicit file_status(file_type __ft, perms __prms = perms::unknown) noexcept - : __ft_(__ft), - __prms_(__prms) {} - - file_status(const file_status&) noexcept = default; - file_status(file_status&&) noexcept = default; - - _LIBCPP_INLINE_VISIBILITY - ~file_status() {} - - file_status& operator=(const file_status&) noexcept = default; - file_status& operator=(file_status&&) noexcept = default; - - // observers - _LIBCPP_INLINE_VISIBILITY - file_type type() const noexcept { return __ft_; } - - _LIBCPP_INLINE_VISIBILITY - perms permissions() const noexcept { return __prms_; } - - // modifiers - _LIBCPP_INLINE_VISIBILITY - void type(file_type __ft) noexcept { __ft_ = __ft; } - - _LIBCPP_INLINE_VISIBILITY - void permissions(perms __p) noexcept { __prms_ = __p; } - -private: - file_type __ft_; - perms __prms_; -}; - -class _LIBCPP_TYPE_VIS directory_entry; - -template <class _Tp> -struct __can_convert_char { - static const bool value = false; -}; -template <class _Tp> -struct __can_convert_char<const _Tp> : public __can_convert_char<_Tp> {}; -template <> -struct __can_convert_char<char> { - static const bool value = true; - using __char_type = char; -}; -template <> -struct __can_convert_char<wchar_t> { - static const bool value = true; - using __char_type = wchar_t; -}; -#ifndef _LIBCPP_HAS_NO_CHAR8_T -template <> -struct __can_convert_char<char8_t> { - static const bool value = true; - using __char_type = char8_t; -}; -#endif -template <> -struct __can_convert_char<char16_t> { - static const bool value = true; - using __char_type = char16_t; -}; -template <> -struct __can_convert_char<char32_t> { - static const bool value = true; - using __char_type = char32_t; -}; - -template <class _ECharT> -typename enable_if<__can_convert_char<_ECharT>::value, bool>::type -__is_separator(_ECharT __e) { -#if defined(_LIBCPP_WIN32API) - return __e == _ECharT('/') || __e == _ECharT('\\'); -#else - return __e == _ECharT('/'); -#endif -} - -#ifndef _LIBCPP_HAS_NO_CHAR8_T -typedef u8string __u8_string; -#else -typedef string __u8_string; -#endif - -struct _NullSentinel {}; - -template <class _Tp> -using _Void = void; - -template <class _Tp, class = void> -struct __is_pathable_string : public false_type {}; - -template <class _ECharT, class _Traits, class _Alloc> -struct __is_pathable_string< - basic_string<_ECharT, _Traits, _Alloc>, - _Void<typename __can_convert_char<_ECharT>::__char_type> > - : public __can_convert_char<_ECharT> { - using _Str = basic_string<_ECharT, _Traits, _Alloc>; - using _Base = __can_convert_char<_ECharT>; - static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); } - static _ECharT const* __range_end(_Str const& __s) { - return __s.data() + __s.length(); - } - static _ECharT __first_or_null(_Str const& __s) { - return __s.empty() ? _ECharT{} : __s[0]; - } -}; - -template <class _ECharT, class _Traits> -struct __is_pathable_string< - basic_string_view<_ECharT, _Traits>, - _Void<typename __can_convert_char<_ECharT>::__char_type> > - : public __can_convert_char<_ECharT> { - using _Str = basic_string_view<_ECharT, _Traits>; - using _Base = __can_convert_char<_ECharT>; - static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); } - static _ECharT const* __range_end(_Str const& __s) { - return __s.data() + __s.length(); - } - static _ECharT __first_or_null(_Str const& __s) { - return __s.empty() ? _ECharT{} : __s[0]; - } -}; - -template <class _Source, class _DS = typename decay<_Source>::type, - class _UnqualPtrType = - typename remove_const<typename remove_pointer<_DS>::type>::type, - bool _IsCharPtr = is_pointer<_DS>::value&& - __can_convert_char<_UnqualPtrType>::value> -struct __is_pathable_char_array : false_type {}; - -template <class _Source, class _ECharT, class _UPtr> -struct __is_pathable_char_array<_Source, _ECharT*, _UPtr, true> - : __can_convert_char<typename remove_const<_ECharT>::type> { - using _Base = __can_convert_char<typename remove_const<_ECharT>::type>; - - static _ECharT const* __range_begin(const _ECharT* __b) { return __b; } - static _ECharT const* __range_end(const _ECharT* __b) { - using _Iter = const _ECharT*; - const _ECharT __sentinel = _ECharT{}; - _Iter __e = __b; - for (; *__e != __sentinel; ++__e) - ; - return __e; - } - - static _ECharT __first_or_null(const _ECharT* __b) { return *__b; } -}; - -template <class _Iter, bool _IsIt = __is_cpp17_input_iterator<_Iter>::value, - class = void> -struct __is_pathable_iter : false_type {}; - -template <class _Iter> -struct __is_pathable_iter< - _Iter, true, - _Void<typename __can_convert_char< - typename iterator_traits<_Iter>::value_type>::__char_type> > - : __can_convert_char<typename iterator_traits<_Iter>::value_type> { - using _ECharT = typename iterator_traits<_Iter>::value_type; - using _Base = __can_convert_char<_ECharT>; - - static _Iter __range_begin(_Iter __b) { return __b; } - static _NullSentinel __range_end(_Iter) { return _NullSentinel{}; } - - static _ECharT __first_or_null(_Iter __b) { return *__b; } -}; - -template <class _Tp, bool _IsStringT = __is_pathable_string<_Tp>::value, - bool _IsCharIterT = __is_pathable_char_array<_Tp>::value, - bool _IsIterT = !_IsCharIterT && __is_pathable_iter<_Tp>::value> -struct __is_pathable : false_type { - static_assert(!_IsStringT && !_IsCharIterT && !_IsIterT, "Must all be false"); -}; - -template <class _Tp> -struct __is_pathable<_Tp, true, false, false> : __is_pathable_string<_Tp> {}; - -template <class _Tp> -struct __is_pathable<_Tp, false, true, false> : __is_pathable_char_array<_Tp> { -}; - -template <class _Tp> -struct __is_pathable<_Tp, false, false, true> : __is_pathable_iter<_Tp> {}; - -#if defined(_LIBCPP_WIN32API) -typedef wstring __path_string; -typedef wchar_t __path_value; -#else -typedef string __path_string; -typedef char __path_value; -#endif - -#if defined(_LIBCPP_WIN32API) -_LIBCPP_FUNC_VIS -size_t __wide_to_char(const wstring&, char*, size_t); -_LIBCPP_FUNC_VIS -size_t __char_to_wide(const string&, wchar_t*, size_t); -#endif - -template <class _ECharT> -struct _PathCVT; - -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) -template <class _ECharT> -struct _PathCVT { - static_assert(__can_convert_char<_ECharT>::value, - "Char type not convertible"); - - typedef __narrow_to_utf8<sizeof(_ECharT) * __CHAR_BIT__> _Narrower; -#if defined(_LIBCPP_WIN32API) - typedef __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__> _Widener; -#endif - - static void __append_range(__path_string& __dest, _ECharT const* __b, - _ECharT const* __e) { -#if defined(_LIBCPP_WIN32API) - string __utf8; - _Narrower()(back_inserter(__utf8), __b, __e); - _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); -#else - _Narrower()(back_inserter(__dest), __b, __e); -#endif - } - - template <class _Iter> - static void __append_range(__path_string& __dest, _Iter __b, _Iter __e) { - static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload"); - if (__b == __e) - return; - basic_string<_ECharT> __tmp(__b, __e); -#if defined(_LIBCPP_WIN32API) - string __utf8; - _Narrower()(back_inserter(__utf8), __tmp.data(), - __tmp.data() + __tmp.length()); - _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); -#else - _Narrower()(back_inserter(__dest), __tmp.data(), - __tmp.data() + __tmp.length()); -#endif - } - - template <class _Iter> - static void __append_range(__path_string& __dest, _Iter __b, _NullSentinel) { - static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload"); - const _ECharT __sentinel = _ECharT{}; - if (*__b == __sentinel) - return; - basic_string<_ECharT> __tmp; - for (; *__b != __sentinel; ++__b) - __tmp.push_back(*__b); -#if defined(_LIBCPP_WIN32API) - string __utf8; - _Narrower()(back_inserter(__utf8), __tmp.data(), - __tmp.data() + __tmp.length()); - _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); -#else - _Narrower()(back_inserter(__dest), __tmp.data(), - __tmp.data() + __tmp.length()); -#endif - } - - template <class _Source> - static void __append_source(__path_string& __dest, _Source const& __s) { - using _Traits = __is_pathable<_Source>; - __append_range(__dest, _Traits::__range_begin(__s), - _Traits::__range_end(__s)); - } -}; -#endif // !_LIBCPP_HAS_NO_LOCALIZATION - -template <> -struct _PathCVT<__path_value> { - - template <class _Iter> - static typename enable_if<__is_exactly_cpp17_input_iterator<_Iter>::value>::type - __append_range(__path_string& __dest, _Iter __b, _Iter __e) { - for (; __b != __e; ++__b) - __dest.push_back(*__b); - } - - template <class _Iter> - static typename enable_if<__is_cpp17_forward_iterator<_Iter>::value>::type - __append_range(__path_string& __dest, _Iter __b, _Iter __e) { - __dest.append(__b, __e); - } - - template <class _Iter> - static void __append_range(__path_string& __dest, _Iter __b, _NullSentinel) { - const char __sentinel = char{}; - for (; *__b != __sentinel; ++__b) - __dest.push_back(*__b); - } - - template <class _Source> - static void __append_source(__path_string& __dest, _Source const& __s) { - using _Traits = __is_pathable<_Source>; - __append_range(__dest, _Traits::__range_begin(__s), - _Traits::__range_end(__s)); - } -}; - -#if defined(_LIBCPP_WIN32API) -template <> -struct _PathCVT<char> { - - static void - __append_string(__path_string& __dest, const basic_string<char> &__str) { - size_t __size = __char_to_wide(__str, nullptr, 0); - size_t __pos = __dest.size(); - __dest.resize(__pos + __size); - __char_to_wide(__str, const_cast<__path_value*>(__dest.data()) + __pos, __size); - } - - template <class _Iter> - static typename enable_if<__is_exactly_cpp17_input_iterator<_Iter>::value>::type - __append_range(__path_string& __dest, _Iter __b, _Iter __e) { - basic_string<char> __tmp(__b, __e); - __append_string(__dest, __tmp); - } - - template <class _Iter> - static typename enable_if<__is_cpp17_forward_iterator<_Iter>::value>::type - __append_range(__path_string& __dest, _Iter __b, _Iter __e) { - basic_string<char> __tmp(__b, __e); - __append_string(__dest, __tmp); - } - - template <class _Iter> - static void __append_range(__path_string& __dest, _Iter __b, _NullSentinel) { - const char __sentinel = char{}; - basic_string<char> __tmp; - for (; *__b != __sentinel; ++__b) - __tmp.push_back(*__b); - __append_string(__dest, __tmp); - } - - template <class _Source> - static void __append_source(__path_string& __dest, _Source const& __s) { - using _Traits = __is_pathable<_Source>; - __append_range(__dest, _Traits::__range_begin(__s), - _Traits::__range_end(__s)); - } -}; - -template <class _ECharT> -struct _PathExport { - typedef __narrow_to_utf8<sizeof(wchar_t) * __CHAR_BIT__> _Narrower; - typedef __widen_from_utf8<sizeof(_ECharT) * __CHAR_BIT__> _Widener; - - template <class _Str> - static void __append(_Str& __dest, const __path_string& __src) { - string __utf8; - _Narrower()(back_inserter(__utf8), __src.data(), __src.data() + __src.size()); - _Widener()(back_inserter(__dest), __utf8.data(), __utf8.data() + __utf8.size()); - } -}; - -template <> -struct _PathExport<char> { - template <class _Str> - static void __append(_Str& __dest, const __path_string& __src) { - size_t __size = __wide_to_char(__src, nullptr, 0); - size_t __pos = __dest.size(); - __dest.resize(__size); - __wide_to_char(__src, const_cast<char*>(__dest.data()) + __pos, __size); - } -}; - -template <> -struct _PathExport<wchar_t> { - template <class _Str> - static void __append(_Str& __dest, const __path_string& __src) { - __dest.append(__src.begin(), __src.end()); - } -}; - -template <> -struct _PathExport<char16_t> { - template <class _Str> - static void __append(_Str& __dest, const __path_string& __src) { - __dest.append(__src.begin(), __src.end()); - } -}; - -#ifndef _LIBCPP_HAS_NO_CHAR8_T -template <> -struct _PathExport<char8_t> { - typedef __narrow_to_utf8<sizeof(wchar_t) * __CHAR_BIT__> _Narrower; - - template <class _Str> - static void __append(_Str& __dest, const __path_string& __src) { - _Narrower()(back_inserter(__dest), __src.data(), __src.data() + __src.size()); - } -}; -#endif /* !_LIBCPP_HAS_NO_CHAR8_T */ -#endif /* _LIBCPP_WIN32API */ - -class _LIBCPP_TYPE_VIS path { - template <class _SourceOrIter, class _Tp = path&> - using _EnableIfPathable = - typename enable_if<__is_pathable<_SourceOrIter>::value, _Tp>::type; - - template <class _Tp> - using _SourceChar = typename __is_pathable<_Tp>::__char_type; - - template <class _Tp> - using _SourceCVT = _PathCVT<_SourceChar<_Tp> >; - -public: -#if defined(_LIBCPP_WIN32API) - typedef wchar_t value_type; - static constexpr value_type preferred_separator = L'\\'; -#else - typedef char value_type; - static constexpr value_type preferred_separator = '/'; -#endif - typedef basic_string<value_type> string_type; - typedef basic_string_view<value_type> __string_view; - - enum _LIBCPP_ENUM_VIS format : unsigned char { - auto_format, - native_format, - generic_format - }; - - // constructors and destructor - _LIBCPP_INLINE_VISIBILITY path() noexcept {} - _LIBCPP_INLINE_VISIBILITY path(const path& __p) : __pn_(__p.__pn_) {} - _LIBCPP_INLINE_VISIBILITY path(path&& __p) noexcept - : __pn_(_VSTD::move(__p.__pn_)) {} - - _LIBCPP_INLINE_VISIBILITY - path(string_type&& __s, format = format::auto_format) noexcept - : __pn_(_VSTD::move(__s)) {} - - template <class _Source, class = _EnableIfPathable<_Source, void> > - path(const _Source& __src, format = format::auto_format) { - _SourceCVT<_Source>::__append_source(__pn_, __src); - } - - template <class _InputIt> - path(_InputIt __first, _InputIt __last, format = format::auto_format) { - typedef typename iterator_traits<_InputIt>::value_type _ItVal; - _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); - } - -/* -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) - // TODO Implement locale conversions. - template <class _Source, class = _EnableIfPathable<_Source, void> > - path(const _Source& __src, const locale& __loc, format = format::auto_format); - template <class _InputIt> - path(_InputIt __first, _InputIt _last, const locale& __loc, - format = format::auto_format); -#endif -*/ - - _LIBCPP_INLINE_VISIBILITY - ~path() = default; - - // assignments - _LIBCPP_INLINE_VISIBILITY - path& operator=(const path& __p) { - __pn_ = __p.__pn_; - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& operator=(path&& __p) noexcept { - __pn_ = _VSTD::move(__p.__pn_); - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& operator=(string_type&& __s) noexcept { - __pn_ = _VSTD::move(__s); - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& assign(string_type&& __s) noexcept { - __pn_ = _VSTD::move(__s); - return *this; - } - - template <class _Source> - _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> - operator=(const _Source& __src) { - return this->assign(__src); - } - - template <class _Source> - _EnableIfPathable<_Source> assign(const _Source& __src) { - __pn_.clear(); - _SourceCVT<_Source>::__append_source(__pn_, __src); - return *this; - } - - template <class _InputIt> - path& assign(_InputIt __first, _InputIt __last) { - typedef typename iterator_traits<_InputIt>::value_type _ItVal; - __pn_.clear(); - _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); - return *this; - } - -public: - // appends -#if defined(_LIBCPP_WIN32API) - path& operator/=(const path& __p) { - auto __p_root_name = __p.__root_name(); - auto __p_root_name_size = __p_root_name.size(); - if (__p.is_absolute() || - (!__p_root_name.empty() && __p_root_name != __string_view(root_name().__pn_))) { - __pn_ = __p.__pn_; - return *this; - } - if (__p.has_root_directory()) { - path __root_name_str = root_name(); - __pn_ = __root_name_str.native(); - __pn_ += __string_view(__p.__pn_).substr(__p_root_name_size); - return *this; - } - if (has_filename() || (!has_root_directory() && is_absolute())) - __pn_ += preferred_separator; - __pn_ += __string_view(__p.__pn_).substr(__p_root_name_size); - return *this; - } - template <class _Source> - _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> - operator/=(const _Source& __src) { - return operator/=(path(__src)); - } - - template <class _Source> - _EnableIfPathable<_Source> append(const _Source& __src) { - return operator/=(path(__src)); - } - - template <class _InputIt> - path& append(_InputIt __first, _InputIt __last) { - return operator/=(path(__first, __last)); - } -#else - path& operator/=(const path& __p) { - if (__p.is_absolute()) { - __pn_ = __p.__pn_; - return *this; - } - if (has_filename()) - __pn_ += preferred_separator; - __pn_ += __p.native(); - return *this; - } - - // FIXME: Use _LIBCPP_DIAGNOSE_WARNING to produce a diagnostic when __src - // is known at compile time to be "/' since the user almost certainly intended - // to append a separator instead of overwriting the path with "/" - template <class _Source> - _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> - operator/=(const _Source& __src) { - return this->append(__src); - } - - template <class _Source> - _EnableIfPathable<_Source> append(const _Source& __src) { - using _Traits = __is_pathable<_Source>; - using _CVT = _PathCVT<_SourceChar<_Source> >; - bool __source_is_absolute = __is_separator(_Traits::__first_or_null(__src)); - if (__source_is_absolute) - __pn_.clear(); - else if (has_filename()) - __pn_ += preferred_separator; - _CVT::__append_source(__pn_, __src); - return *this; - } - - template <class _InputIt> - path& append(_InputIt __first, _InputIt __last) { - typedef typename iterator_traits<_InputIt>::value_type _ItVal; - static_assert(__can_convert_char<_ItVal>::value, "Must convertible"); - using _CVT = _PathCVT<_ItVal>; - if (__first != __last && __is_separator(*__first)) - __pn_.clear(); - else if (has_filename()) - __pn_ += preferred_separator; - _CVT::__append_range(__pn_, __first, __last); - return *this; - } -#endif - - // concatenation - _LIBCPP_INLINE_VISIBILITY - path& operator+=(const path& __x) { - __pn_ += __x.__pn_; - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& operator+=(const string_type& __x) { - __pn_ += __x; - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& operator+=(__string_view __x) { - __pn_ += __x; - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& operator+=(const value_type* __x) { - __pn_ += __x; - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& operator+=(value_type __x) { - __pn_ += __x; - return *this; - } - - template <class _ECharT> - typename enable_if<__can_convert_char<_ECharT>::value, path&>::type - operator+=(_ECharT __x) { - _PathCVT<_ECharT>::__append_source(__pn_, - basic_string_view<_ECharT>(&__x, 1)); - return *this; - } - - template <class _Source> - _EnableIfPathable<_Source> operator+=(const _Source& __x) { - return this->concat(__x); - } - - template <class _Source> - _EnableIfPathable<_Source> concat(const _Source& __x) { - _SourceCVT<_Source>::__append_source(__pn_, __x); - return *this; - } - - template <class _InputIt> - path& concat(_InputIt __first, _InputIt __last) { - typedef typename iterator_traits<_InputIt>::value_type _ItVal; - _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); - return *this; - } - - // modifiers - _LIBCPP_INLINE_VISIBILITY - void clear() noexcept { __pn_.clear(); } - - path& make_preferred() { -#if defined(_LIBCPP_WIN32API) - _VSTD::replace(__pn_.begin(), __pn_.end(), L'/', L'\\'); -#endif - return *this; - } - - _LIBCPP_INLINE_VISIBILITY - path& remove_filename() { - auto __fname = __filename(); - if (!__fname.empty()) - __pn_.erase(__fname.data() - __pn_.data()); - return *this; - } - - path& replace_filename(const path& __replacement) { - remove_filename(); - return (*this /= __replacement); - } - - path& replace_extension(const path& __replacement = path()); - - _LIBCPP_INLINE_VISIBILITY - void swap(path& __rhs) noexcept { __pn_.swap(__rhs.__pn_); } - - // private helper to allow reserving memory in the path - _LIBCPP_INLINE_VISIBILITY - void __reserve(size_t __s) { __pn_.reserve(__s); } - - // native format observers - _LIBCPP_INLINE_VISIBILITY - const string_type& native() const noexcept { return __pn_; } - - _LIBCPP_INLINE_VISIBILITY - const value_type* c_str() const noexcept { return __pn_.c_str(); } - - _LIBCPP_INLINE_VISIBILITY operator string_type() const { return __pn_; } - -#if defined(_LIBCPP_WIN32API) - _LIBCPP_INLINE_VISIBILITY _VSTD::wstring wstring() const { return __pn_; } - - _VSTD::wstring generic_wstring() const { - _VSTD::wstring __s; - __s.resize(__pn_.size()); - _VSTD::replace_copy(__pn_.begin(), __pn_.end(), __s.begin(), '\\', '/'); - return __s; - } - -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) - template <class _ECharT, class _Traits = char_traits<_ECharT>, - class _Allocator = allocator<_ECharT> > - basic_string<_ECharT, _Traits, _Allocator> - string(const _Allocator& __a = _Allocator()) const { - using _Str = basic_string<_ECharT, _Traits, _Allocator>; - _Str __s(__a); - __s.reserve(__pn_.size()); - _PathExport<_ECharT>::__append(__s, __pn_); - return __s; - } - - _LIBCPP_INLINE_VISIBILITY _VSTD::string string() const { - return string<char>(); - } - _LIBCPP_INLINE_VISIBILITY __u8_string u8string() const { - using _CVT = __narrow_to_utf8<sizeof(wchar_t) * __CHAR_BIT__>; - __u8_string __s; - __s.reserve(__pn_.size()); - _CVT()(back_inserter(__s), __pn_.data(), __pn_.data() + __pn_.size()); - return __s; - } - - _LIBCPP_INLINE_VISIBILITY _VSTD::u16string u16string() const { - return string<char16_t>(); - } - _LIBCPP_INLINE_VISIBILITY _VSTD::u32string u32string() const { - return string<char32_t>(); - } - - // generic format observers - template <class _ECharT, class _Traits = char_traits<_ECharT>, - class _Allocator = allocator<_ECharT> > - basic_string<_ECharT, _Traits, _Allocator> - generic_string(const _Allocator& __a = _Allocator()) const { - using _Str = basic_string<_ECharT, _Traits, _Allocator>; - _Str __s = string<_ECharT, _Traits, _Allocator>(__a); - // Note: This (and generic_u8string below) is slightly suboptimal as - // it iterates twice over the string; once to convert it to the right - // character type, and once to replace path delimiters. - _VSTD::replace(__s.begin(), __s.end(), - static_cast<_ECharT>('\\'), static_cast<_ECharT>('/')); - return __s; - } - - _VSTD::string generic_string() const { return generic_string<char>(); } - _VSTD::u16string generic_u16string() const { return generic_string<char16_t>(); } - _VSTD::u32string generic_u32string() const { return generic_string<char32_t>(); } - __u8_string generic_u8string() const { - __u8_string __s = u8string(); - _VSTD::replace(__s.begin(), __s.end(), '\\', '/'); - return __s; - } -#endif /* !_LIBCPP_HAS_NO_LOCALIZATION */ -#else /* _LIBCPP_WIN32API */ - - _LIBCPP_INLINE_VISIBILITY _VSTD::string string() const { return __pn_; } -#ifndef _LIBCPP_HAS_NO_CHAR8_T - _LIBCPP_INLINE_VISIBILITY _VSTD::u8string u8string() const { return _VSTD::u8string(__pn_.begin(), __pn_.end()); } -#else - _LIBCPP_INLINE_VISIBILITY _VSTD::string u8string() const { return __pn_; } -#endif - -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) - template <class _ECharT, class _Traits = char_traits<_ECharT>, - class _Allocator = allocator<_ECharT> > - basic_string<_ECharT, _Traits, _Allocator> - string(const _Allocator& __a = _Allocator()) const { - using _CVT = __widen_from_utf8<sizeof(_ECharT) * __CHAR_BIT__>; - using _Str = basic_string<_ECharT, _Traits, _Allocator>; - _Str __s(__a); - __s.reserve(__pn_.size()); - _CVT()(back_inserter(__s), __pn_.data(), __pn_.data() + __pn_.size()); - return __s; - } - -#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS - _LIBCPP_INLINE_VISIBILITY _VSTD::wstring wstring() const { - return string<wchar_t>(); - } -#endif - _LIBCPP_INLINE_VISIBILITY _VSTD::u16string u16string() const { - return string<char16_t>(); - } - _LIBCPP_INLINE_VISIBILITY _VSTD::u32string u32string() const { - return string<char32_t>(); - } -#endif /* !_LIBCPP_HAS_NO_LOCALIZATION */ - - // generic format observers - _VSTD::string generic_string() const { return __pn_; } -#ifndef _LIBCPP_HAS_NO_CHAR8_T - _VSTD::u8string generic_u8string() const { return _VSTD::u8string(__pn_.begin(), __pn_.end()); } -#else - _VSTD::string generic_u8string() const { return __pn_; } -#endif - -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) - template <class _ECharT, class _Traits = char_traits<_ECharT>, - class _Allocator = allocator<_ECharT> > - basic_string<_ECharT, _Traits, _Allocator> - generic_string(const _Allocator& __a = _Allocator()) const { - return string<_ECharT, _Traits, _Allocator>(__a); - } - -#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS - _VSTD::wstring generic_wstring() const { return string<wchar_t>(); } -#endif - _VSTD::u16string generic_u16string() const { return string<char16_t>(); } - _VSTD::u32string generic_u32string() const { return string<char32_t>(); } -#endif /* !_LIBCPP_HAS_NO_LOCALIZATION */ -#endif /* !_LIBCPP_WIN32API */ - -private: - int __compare(__string_view) const; - __string_view __root_name() const; - __string_view __root_directory() const; - __string_view __root_path_raw() const; - __string_view __relative_path() const; - __string_view __parent_path() const; - __string_view __filename() const; - __string_view __stem() const; - __string_view __extension() const; - -public: - // compare - _LIBCPP_INLINE_VISIBILITY int compare(const path& __p) const noexcept { - return __compare(__p.__pn_); - } - _LIBCPP_INLINE_VISIBILITY int compare(const string_type& __s) const { - return __compare(__s); - } - _LIBCPP_INLINE_VISIBILITY int compare(__string_view __s) const { - return __compare(__s); - } - _LIBCPP_INLINE_VISIBILITY int compare(const value_type* __s) const { - return __compare(__s); - } - - // decomposition - _LIBCPP_INLINE_VISIBILITY path root_name() const { - return string_type(__root_name()); - } - _LIBCPP_INLINE_VISIBILITY path root_directory() const { - return string_type(__root_directory()); - } - _LIBCPP_INLINE_VISIBILITY path root_path() const { -#if defined(_LIBCPP_WIN32API) - return string_type(__root_path_raw()); -#else - return root_name().append(string_type(__root_directory())); -#endif - } - _LIBCPP_INLINE_VISIBILITY path relative_path() const { - return string_type(__relative_path()); - } - _LIBCPP_INLINE_VISIBILITY path parent_path() const { - return string_type(__parent_path()); - } - _LIBCPP_INLINE_VISIBILITY path filename() const { - return string_type(__filename()); - } - _LIBCPP_INLINE_VISIBILITY path stem() const { return string_type(__stem()); } - _LIBCPP_INLINE_VISIBILITY path extension() const { - return string_type(__extension()); - } - - // query - _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY bool - empty() const noexcept { - return __pn_.empty(); - } - - _LIBCPP_INLINE_VISIBILITY bool has_root_name() const { - return !__root_name().empty(); - } - _LIBCPP_INLINE_VISIBILITY bool has_root_directory() const { - return !__root_directory().empty(); - } - _LIBCPP_INLINE_VISIBILITY bool has_root_path() const { - return !__root_path_raw().empty(); - } - _LIBCPP_INLINE_VISIBILITY bool has_relative_path() const { - return !__relative_path().empty(); - } - _LIBCPP_INLINE_VISIBILITY bool has_parent_path() const { - return !__parent_path().empty(); - } - _LIBCPP_INLINE_VISIBILITY bool has_filename() const { - return !__filename().empty(); - } - _LIBCPP_INLINE_VISIBILITY bool has_stem() const { return !__stem().empty(); } - _LIBCPP_INLINE_VISIBILITY bool has_extension() const { - return !__extension().empty(); - } - - _LIBCPP_INLINE_VISIBILITY bool is_absolute() const { -#if defined(_LIBCPP_WIN32API) - __string_view __root_name_str = __root_name(); - __string_view __root_dir = __root_directory(); - if (__root_name_str.size() == 2 && __root_name_str[1] == ':') { - // A drive letter with no root directory is relative, e.g. x:example. - return !__root_dir.empty(); - } - // If no root name, it's relative, e.g. \example is relative to the current drive - if (__root_name_str.empty()) - return false; - if (__root_name_str.size() < 3) - return false; - // A server root name, like \\server, is always absolute - if (__root_name_str[0] != '/' && __root_name_str[0] != '\\') - return false; - if (__root_name_str[1] != '/' && __root_name_str[1] != '\\') - return false; - // Seems to be a server root name - return true; -#else - return has_root_directory(); -#endif - } - _LIBCPP_INLINE_VISIBILITY bool is_relative() const { return !is_absolute(); } - - // relative paths - path lexically_normal() const; - path lexically_relative(const path& __base) const; - - _LIBCPP_INLINE_VISIBILITY path lexically_proximate(const path& __base) const { - path __result = this->lexically_relative(__base); - if (__result.native().empty()) - return *this; - return __result; - } - - // iterators - class _LIBCPP_TYPE_VIS iterator; - typedef iterator const_iterator; - - iterator begin() const; - iterator end() const; - -#if !defined(_LIBCPP_HAS_NO_LOCALIZATION) - template <class _CharT, class _Traits> - _LIBCPP_INLINE_VISIBILITY friend - typename enable_if<is_same<_CharT, value_type>::value && - is_same<_Traits, char_traits<value_type> >::value, - basic_ostream<_CharT, _Traits>&>::type - operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { - __os << _VSTD::__quoted(__p.native()); - return __os; - } - - template <class _CharT, class _Traits> - _LIBCPP_INLINE_VISIBILITY friend - typename enable_if<!is_same<_CharT, value_type>::value || - !is_same<_Traits, char_traits<value_type> >::value, - basic_ostream<_CharT, _Traits>&>::type - operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { - __os << _VSTD::__quoted(__p.string<_CharT, _Traits>()); - return __os; - } - - template <class _CharT, class _Traits> - _LIBCPP_INLINE_VISIBILITY friend basic_istream<_CharT, _Traits>& - operator>>(basic_istream<_CharT, _Traits>& __is, path& __p) { - basic_string<_CharT, _Traits> __tmp; - __is >> __quoted(__tmp); - __p = __tmp; - return __is; - } -#endif // !_LIBCPP_HAS_NO_LOCALIZATION - - friend _LIBCPP_INLINE_VISIBILITY bool operator==(const path& __lhs, const path& __rhs) noexcept { - return __lhs.__compare(__rhs.__pn_) == 0; - } - friend _LIBCPP_INLINE_VISIBILITY bool operator!=(const path& __lhs, const path& __rhs) noexcept { - return __lhs.__compare(__rhs.__pn_) != 0; - } - friend _LIBCPP_INLINE_VISIBILITY bool operator<(const path& __lhs, const path& __rhs) noexcept { - return __lhs.__compare(__rhs.__pn_) < 0; - } - friend _LIBCPP_INLINE_VISIBILITY bool operator<=(const path& __lhs, const path& __rhs) noexcept { - return __lhs.__compare(__rhs.__pn_) <= 0; - } - friend _LIBCPP_INLINE_VISIBILITY bool operator>(const path& __lhs, const path& __rhs) noexcept { - return __lhs.__compare(__rhs.__pn_) > 0; - } - friend _LIBCPP_INLINE_VISIBILITY bool operator>=(const path& __lhs, const path& __rhs) noexcept { - return __lhs.__compare(__rhs.__pn_) >= 0; - } - - friend _LIBCPP_INLINE_VISIBILITY path operator/(const path& __lhs, - const path& __rhs) { - path __result(__lhs); - __result /= __rhs; - return __result; - } -private: - inline _LIBCPP_INLINE_VISIBILITY path& - __assign_view(__string_view const& __s) noexcept { - __pn_ = string_type(__s); - return *this; - } - string_type __pn_; -}; - -inline _LIBCPP_INLINE_VISIBILITY void swap(path& __lhs, path& __rhs) noexcept { - __lhs.swap(__rhs); -} - -_LIBCPP_FUNC_VIS -size_t hash_value(const path& __p) noexcept; - -template <class _InputIt> -_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T - typename enable_if<__is_pathable<_InputIt>::value, path>::type - u8path(_InputIt __f, _InputIt __l) { - static_assert( -#ifndef _LIBCPP_HAS_NO_CHAR8_T - is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value || -#endif - is_same<typename __is_pathable<_InputIt>::__char_type, char>::value, - "u8path(Iter, Iter) requires Iter have a value_type of type 'char'" - " or 'char8_t'"); -#if defined(_LIBCPP_WIN32API) - string __tmp(__f, __l); - using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>; - _VSTD::wstring __w; - __w.reserve(__tmp.size()); - _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size()); - return path(__w); -#else - return path(__f, __l); -#endif /* !_LIBCPP_WIN32API */ -} - -#if defined(_LIBCPP_WIN32API) -template <class _InputIt> -_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T - typename enable_if<__is_pathable<_InputIt>::value, path>::type - u8path(_InputIt __f, _NullSentinel) { - static_assert( -#ifndef _LIBCPP_HAS_NO_CHAR8_T - is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value || -#endif - is_same<typename __is_pathable<_InputIt>::__char_type, char>::value, - "u8path(Iter, Iter) requires Iter have a value_type of type 'char'" - " or 'char8_t'"); - string __tmp; - const char __sentinel = char{}; - for (; *__f != __sentinel; ++__f) - __tmp.push_back(*__f); - using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>; - _VSTD::wstring __w; - __w.reserve(__tmp.size()); - _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size()); - return path(__w); -} -#endif /* _LIBCPP_WIN32API */ - -template <class _Source> -_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T - typename enable_if<__is_pathable<_Source>::value, path>::type - u8path(const _Source& __s) { - static_assert( -#ifndef _LIBCPP_HAS_NO_CHAR8_T - is_same<typename __is_pathable<_Source>::__char_type, char8_t>::value || -#endif - is_same<typename __is_pathable<_Source>::__char_type, char>::value, - "u8path(Source const&) requires Source have a character type of type " - "'char' or 'char8_t'"); -#if defined(_LIBCPP_WIN32API) - using _Traits = __is_pathable<_Source>; - return u8path(_VSTD::__unwrap_iter(_Traits::__range_begin(__s)), _VSTD::__unwrap_iter(_Traits::__range_end(__s))); -#else - return path(__s); -#endif -} - -class _LIBCPP_TYPE_VIS path::iterator { -public: - enum _ParserState : unsigned char { - _Singular, - _BeforeBegin, - _InRootName, - _InRootDir, - _InFilenames, - _InTrailingSep, - _AtEnd - }; - -public: - typedef bidirectional_iterator_tag iterator_category; - - typedef path value_type; - typedef ptrdiff_t difference_type; - typedef const path* pointer; - typedef const path& reference; - - typedef void - __stashing_iterator_tag; // See reverse_iterator and __is_stashing_iterator - -public: - _LIBCPP_INLINE_VISIBILITY - iterator() - : __stashed_elem_(), __path_ptr_(nullptr), __entry_(), - __state_(_Singular) {} - - iterator(const iterator&) = default; - ~iterator() = default; - - iterator& operator=(const iterator&) = default; - - _LIBCPP_INLINE_VISIBILITY - reference operator*() const { return __stashed_elem_; } - - _LIBCPP_INLINE_VISIBILITY - pointer operator->() const { return &__stashed_elem_; } - - _LIBCPP_INLINE_VISIBILITY - iterator& operator++() { - _LIBCPP_ASSERT(__state_ != _Singular, - "attempting to increment a singular iterator"); - _LIBCPP_ASSERT(__state_ != _AtEnd, - "attempting to increment the end iterator"); - return __increment(); - } - - _LIBCPP_INLINE_VISIBILITY - iterator operator++(int) { - iterator __it(*this); - this->operator++(); - return __it; - } - - _LIBCPP_INLINE_VISIBILITY - iterator& operator--() { - _LIBCPP_ASSERT(__state_ != _Singular, - "attempting to decrement a singular iterator"); - _LIBCPP_ASSERT(__entry_.data() != __path_ptr_->native().data(), - "attempting to decrement the begin iterator"); - return __decrement(); - } - - _LIBCPP_INLINE_VISIBILITY - iterator operator--(int) { - iterator __it(*this); - this->operator--(); - return __it; - } - -private: - friend class path; - - inline _LIBCPP_INLINE_VISIBILITY friend bool operator==(const iterator&, - const iterator&); - - iterator& __increment(); - iterator& __decrement(); - - path __stashed_elem_; - const path* __path_ptr_; - path::__string_view __entry_; - _ParserState __state_; -}; - -inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path::iterator& __lhs, - const path::iterator& __rhs) { - return __lhs.__path_ptr_ == __rhs.__path_ptr_ && - __lhs.__entry_.data() == __rhs.__entry_.data(); -} - -inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path::iterator& __lhs, - const path::iterator& __rhs) { - return !(__lhs == __rhs); -} - -// TODO(ldionne): We need to pop the pragma and push it again after -// filesystem_error to work around PR41078. -_LIBCPP_AVAILABILITY_FILESYSTEM_POP - -class _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error { -public: - _LIBCPP_INLINE_VISIBILITY - filesystem_error(const string& __what, error_code __ec) - : system_error(__ec, __what), - __storage_(make_shared<_Storage>(path(), path())) { - __create_what(0); - } - - _LIBCPP_INLINE_VISIBILITY - filesystem_error(const string& __what, const path& __p1, error_code __ec) - : system_error(__ec, __what), - __storage_(make_shared<_Storage>(__p1, path())) { - __create_what(1); - } - - _LIBCPP_INLINE_VISIBILITY - filesystem_error(const string& __what, const path& __p1, const path& __p2, - error_code __ec) - : system_error(__ec, __what), - __storage_(make_shared<_Storage>(__p1, __p2)) { - __create_what(2); - } - - _LIBCPP_INLINE_VISIBILITY - const path& path1() const noexcept { return __storage_->__p1_; } - - _LIBCPP_INLINE_VISIBILITY - const path& path2() const noexcept { return __storage_->__p2_; } - - filesystem_error(const filesystem_error&) = default; - ~filesystem_error() override; // key function - - _LIBCPP_INLINE_VISIBILITY - const char* what() const noexcept override { - return __storage_->__what_.c_str(); - } - - void __create_what(int __num_paths); - -private: - struct _LIBCPP_HIDDEN _Storage { - _LIBCPP_INLINE_VISIBILITY - _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {} - - path __p1_; - path __p2_; - string __what_; - }; - shared_ptr<_Storage> __storage_; -}; - -_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH - -template <class... _Args> -_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY -#ifndef _LIBCPP_NO_EXCEPTIONS -void __throw_filesystem_error(_Args&&... __args) { - throw filesystem_error(_VSTD::forward<_Args>(__args)...); -} -#else -void __throw_filesystem_error(_Args&&...) { - _VSTD::abort(); -} -#endif - -// operational functions - -_LIBCPP_FUNC_VIS -path __absolute(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -path __canonical(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -void __copy(const path& __from, const path& __to, copy_options __opt, - error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -bool __copy_file(const path& __from, const path& __to, copy_options __opt, - error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -void __copy_symlink(const path& __existing_symlink, const path& __new_symlink, - error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -bool __create_directories(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -bool __create_directory(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -bool __create_directory(const path& p, const path& attributes, - error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -void __create_directory_symlink(const path& __to, const path& __new_symlink, - error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -void __create_hard_link(const path& __to, const path& __new_hard_link, - error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -void __create_symlink(const path& __to, const path& __new_symlink, - error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -path __current_path(error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -void __current_path(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -bool __equivalent(const path&, const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -uintmax_t __file_size(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -uintmax_t __hard_link_count(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -bool __fs_is_empty(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -file_time_type __last_write_time(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -void __last_write_time(const path& p, file_time_type new_time, - error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -void __permissions(const path&, perms, perm_options, error_code* = nullptr); -_LIBCPP_FUNC_VIS -path __read_symlink(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -bool __remove(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -uintmax_t __remove_all(const path& p, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -void __rename(const path& from, const path& to, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -void __resize_file(const path& p, uintmax_t size, error_code* ec = nullptr); -_LIBCPP_FUNC_VIS -space_info __space(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -file_status __status(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -file_status __symlink_status(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -path __system_complete(const path&, error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -path __temp_directory_path(error_code* __ec = nullptr); -_LIBCPP_FUNC_VIS -path __weakly_canonical(path const& __p, error_code* __ec = nullptr); - -inline _LIBCPP_INLINE_VISIBILITY path current_path() { - return __current_path(); -} - -inline _LIBCPP_INLINE_VISIBILITY path current_path(error_code& __ec) { - return __current_path(&__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p) { - __current_path(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p, - error_code& __ec) noexcept { - __current_path(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p) { - return __absolute(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p, - error_code& __ec) { - return __absolute(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p) { - return __canonical(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p, - error_code& __ec) { - return __canonical(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, - const path& __to) { - __copy(__from, __to, copy_options::none); -} - -inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, - error_code& __ec) { - __copy(__from, __to, copy_options::none, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, - copy_options __opt) { - __copy(__from, __to, __opt); -} - -inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, - copy_options __opt, - error_code& __ec) { - __copy(__from, __to, __opt, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from, - const path& __to) { - return __copy_file(__from, __to, copy_options::none); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -copy_file(const path& __from, const path& __to, error_code& __ec) { - return __copy_file(__from, __to, copy_options::none, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -copy_file(const path& __from, const path& __to, copy_options __opt) { - return __copy_file(__from, __to, __opt); -} - -inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from, - const path& __to, - copy_options __opt, - error_code& __ec) { - return __copy_file(__from, __to, __opt, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void copy_symlink(const path& __existing, - const path& __new) { - __copy_symlink(__existing, __new); -} - -inline _LIBCPP_INLINE_VISIBILITY void -copy_symlink(const path& __ext, const path& __new, error_code& __ec) noexcept { - __copy_symlink(__ext, __new, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p) { - return __create_directories(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p, - error_code& __ec) { - return __create_directories(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p) { - return __create_directory(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -create_directory(const path& __p, error_code& __ec) noexcept { - return __create_directory(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p, - const path& __attrs) { - return __create_directory(__p, __attrs); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -create_directory(const path& __p, const path& __attrs, - error_code& __ec) noexcept { - return __create_directory(__p, __attrs, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void -create_directory_symlink(const path& __to, const path& __new) { - __create_directory_symlink(__to, __new); -} - -inline _LIBCPP_INLINE_VISIBILITY void -create_directory_symlink(const path& __to, const path& __new, - error_code& __ec) noexcept { - __create_directory_symlink(__to, __new, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void create_hard_link(const path& __to, - const path& __new) { - __create_hard_link(__to, __new); -} - -inline _LIBCPP_INLINE_VISIBILITY void -create_hard_link(const path& __to, const path& __new, - error_code& __ec) noexcept { - __create_hard_link(__to, __new, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void create_symlink(const path& __to, - const path& __new) { - __create_symlink(__to, __new); -} - -inline _LIBCPP_INLINE_VISIBILITY void -create_symlink(const path& __to, const path& __new, error_code& __ec) noexcept { - return __create_symlink(__to, __new, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool status_known(file_status __s) noexcept { - return __s.type() != file_type::none; -} - -inline _LIBCPP_INLINE_VISIBILITY bool exists(file_status __s) noexcept { - return status_known(__s) && __s.type() != file_type::not_found; -} - -inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p) { - return exists(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p, - error_code& __ec) noexcept { - auto __s = __status(__p, &__ec); - if (status_known(__s)) - __ec.clear(); - return exists(__s); -} - -inline _LIBCPP_INLINE_VISIBILITY bool equivalent(const path& __p1, - const path& __p2) { - return __equivalent(__p1, __p2); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -equivalent(const path& __p1, const path& __p2, error_code& __ec) noexcept { - return __equivalent(__p1, __p2, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY uintmax_t file_size(const path& __p) { - return __file_size(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY uintmax_t -file_size(const path& __p, error_code& __ec) noexcept { - return __file_size(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY uintmax_t hard_link_count(const path& __p) { - return __hard_link_count(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY uintmax_t -hard_link_count(const path& __p, error_code& __ec) noexcept { - return __hard_link_count(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(file_status __s) noexcept { - return __s.type() == file_type::block; -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p) { - return is_block_file(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p, - error_code& __ec) noexcept { - return is_block_file(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -is_character_file(file_status __s) noexcept { - return __s.type() == file_type::character; -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_character_file(const path& __p) { - return is_character_file(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -is_character_file(const path& __p, error_code& __ec) noexcept { - return is_character_file(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_directory(file_status __s) noexcept { - return __s.type() == file_type::directory; -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p) { - return is_directory(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p, - error_code& __ec) noexcept { - return is_directory(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p) { - return __fs_is_empty(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p, - error_code& __ec) { - return __fs_is_empty(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(file_status __s) noexcept { - return __s.type() == file_type::fifo; -} -inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p) { - return is_fifo(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p, - error_code& __ec) noexcept { - return is_fifo(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -is_regular_file(file_status __s) noexcept { - return __s.type() == file_type::regular; -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_regular_file(const path& __p) { - return is_regular_file(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool -is_regular_file(const path& __p, error_code& __ec) noexcept { - return is_regular_file(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_socket(file_status __s) noexcept { - return __s.type() == file_type::socket; -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p) { - return is_socket(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p, - error_code& __ec) noexcept { - return is_socket(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(file_status __s) noexcept { - return __s.type() == file_type::symlink; -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p) { - return is_symlink(__symlink_status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p, - error_code& __ec) noexcept { - return is_symlink(__symlink_status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_other(file_status __s) noexcept { - return exists(__s) && !is_regular_file(__s) && !is_directory(__s) && - !is_symlink(__s); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p) { - return is_other(__status(__p)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p, - error_code& __ec) noexcept { - return is_other(__status(__p, &__ec)); -} - -inline _LIBCPP_INLINE_VISIBILITY file_time_type -last_write_time(const path& __p) { - return __last_write_time(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY file_time_type -last_write_time(const path& __p, error_code& __ec) noexcept { - return __last_write_time(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void last_write_time(const path& __p, - file_time_type __t) { - __last_write_time(__p, __t); -} - -inline _LIBCPP_INLINE_VISIBILITY void -last_write_time(const path& __p, file_time_type __t, - error_code& __ec) noexcept { - __last_write_time(__p, __t, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void -permissions(const path& __p, perms __prms, - perm_options __opts = perm_options::replace) { - __permissions(__p, __prms, __opts); -} - -inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms, - error_code& __ec) noexcept { - __permissions(__p, __prms, perm_options::replace, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms, - perm_options __opts, - error_code& __ec) { - __permissions(__p, __prms, __opts, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p, - const path& __base, - error_code& __ec) { - path __tmp = __weakly_canonical(__p, &__ec); - if (__ec) - return {}; - path __tmp_base = __weakly_canonical(__base, &__ec); - if (__ec) - return {}; - return __tmp.lexically_proximate(__tmp_base); -} - -inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p, - error_code& __ec) { - return proximate(__p, current_path(), __ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path -proximate(const path& __p, const path& __base = current_path()) { - return __weakly_canonical(__p).lexically_proximate( - __weakly_canonical(__base)); -} - -inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p) { - return __read_symlink(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p, - error_code& __ec) { - return __read_symlink(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p, - const path& __base, - error_code& __ec) { - path __tmp = __weakly_canonical(__p, &__ec); - if (__ec) - return path(); - path __tmpbase = __weakly_canonical(__base, &__ec); - if (__ec) - return path(); - return __tmp.lexically_relative(__tmpbase); -} - -inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p, - error_code& __ec) { - return relative(__p, current_path(), __ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path -relative(const path& __p, const path& __base = current_path()) { - return __weakly_canonical(__p).lexically_relative(__weakly_canonical(__base)); -} - -inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p) { - return __remove(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p, - error_code& __ec) noexcept { - return __remove(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p) { - return __remove_all(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p, - error_code& __ec) { - return __remove_all(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void rename(const path& __from, - const path& __to) { - return __rename(__from, __to); -} - -inline _LIBCPP_INLINE_VISIBILITY void -rename(const path& __from, const path& __to, error_code& __ec) noexcept { - return __rename(__from, __to, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY void resize_file(const path& __p, - uintmax_t __ns) { - return __resize_file(__p, __ns); -} - -inline _LIBCPP_INLINE_VISIBILITY void -resize_file(const path& __p, uintmax_t __ns, error_code& __ec) noexcept { - return __resize_file(__p, __ns, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p) { - return __space(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p, - error_code& __ec) noexcept { - return __space(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p) { - return __status(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p, - error_code& __ec) noexcept { - return __status(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY file_status symlink_status(const path& __p) { - return __symlink_status(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY file_status -symlink_status(const path& __p, error_code& __ec) noexcept { - return __symlink_status(__p, &__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path() { - return __temp_directory_path(); -} - -inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path(error_code& __ec) { - return __temp_directory_path(&__ec); -} - -inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p) { - return __weakly_canonical(__p); -} - -inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p, - error_code& __ec) { - return __weakly_canonical(__p, &__ec); -} - -class directory_iterator; -class recursive_directory_iterator; -class _LIBCPP_HIDDEN __dir_stream; - -class directory_entry { - typedef _VSTD_FS::path _Path; - -public: - // constructors and destructors - directory_entry() noexcept = default; - directory_entry(directory_entry const&) = default; - directory_entry(directory_entry&&) noexcept = default; - - _LIBCPP_INLINE_VISIBILITY - explicit directory_entry(_Path const& __p) : __p_(__p) { - error_code __ec; - __refresh(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - directory_entry(_Path const& __p, error_code& __ec) : __p_(__p) { - __refresh(&__ec); - } - - ~directory_entry() {} - - directory_entry& operator=(directory_entry const&) = default; - directory_entry& operator=(directory_entry&&) noexcept = default; - - _LIBCPP_INLINE_VISIBILITY - void assign(_Path const& __p) { - __p_ = __p; - error_code __ec; - __refresh(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - void assign(_Path const& __p, error_code& __ec) { - __p_ = __p; - __refresh(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - void replace_filename(_Path const& __p) { - __p_.replace_filename(__p); - error_code __ec; - __refresh(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - void replace_filename(_Path const& __p, error_code& __ec) { - __p_ = __p_.parent_path() / __p; - __refresh(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - void refresh() { __refresh(); } - - _LIBCPP_INLINE_VISIBILITY - void refresh(error_code& __ec) noexcept { __refresh(&__ec); } - - _LIBCPP_INLINE_VISIBILITY - _Path const& path() const noexcept { return __p_; } - - _LIBCPP_INLINE_VISIBILITY - operator const _Path&() const noexcept { return __p_; } - - _LIBCPP_INLINE_VISIBILITY - bool exists() const { return _VSTD_FS::exists(file_status{__get_ft()}); } - - _LIBCPP_INLINE_VISIBILITY - bool exists(error_code& __ec) const noexcept { - return _VSTD_FS::exists(file_status{__get_ft(&__ec)}); - } - - _LIBCPP_INLINE_VISIBILITY - bool is_block_file() const { return __get_ft() == file_type::block; } - - _LIBCPP_INLINE_VISIBILITY - bool is_block_file(error_code& __ec) const noexcept { - return __get_ft(&__ec) == file_type::block; - } - - _LIBCPP_INLINE_VISIBILITY - bool is_character_file() const { return __get_ft() == file_type::character; } - - _LIBCPP_INLINE_VISIBILITY - bool is_character_file(error_code& __ec) const noexcept { - return __get_ft(&__ec) == file_type::character; - } - - _LIBCPP_INLINE_VISIBILITY - bool is_directory() const { return __get_ft() == file_type::directory; } - - _LIBCPP_INLINE_VISIBILITY - bool is_directory(error_code& __ec) const noexcept { - return __get_ft(&__ec) == file_type::directory; - } - - _LIBCPP_INLINE_VISIBILITY - bool is_fifo() const { return __get_ft() == file_type::fifo; } - - _LIBCPP_INLINE_VISIBILITY - bool is_fifo(error_code& __ec) const noexcept { - return __get_ft(&__ec) == file_type::fifo; - } - - _LIBCPP_INLINE_VISIBILITY - bool is_other() const { return _VSTD_FS::is_other(file_status{__get_ft()}); } - - _LIBCPP_INLINE_VISIBILITY - bool is_other(error_code& __ec) const noexcept { - return _VSTD_FS::is_other(file_status{__get_ft(&__ec)}); - } - - _LIBCPP_INLINE_VISIBILITY - bool is_regular_file() const { return __get_ft() == file_type::regular; } - - _LIBCPP_INLINE_VISIBILITY - bool is_regular_file(error_code& __ec) const noexcept { - return __get_ft(&__ec) == file_type::regular; - } - - _LIBCPP_INLINE_VISIBILITY - bool is_socket() const { return __get_ft() == file_type::socket; } - - _LIBCPP_INLINE_VISIBILITY - bool is_socket(error_code& __ec) const noexcept { - return __get_ft(&__ec) == file_type::socket; - } - - _LIBCPP_INLINE_VISIBILITY - bool is_symlink() const { return __get_sym_ft() == file_type::symlink; } - - _LIBCPP_INLINE_VISIBILITY - bool is_symlink(error_code& __ec) const noexcept { - return __get_sym_ft(&__ec) == file_type::symlink; - } - _LIBCPP_INLINE_VISIBILITY - uintmax_t file_size() const { return __get_size(); } - - _LIBCPP_INLINE_VISIBILITY - uintmax_t file_size(error_code& __ec) const noexcept { - return __get_size(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - uintmax_t hard_link_count() const { return __get_nlink(); } - - _LIBCPP_INLINE_VISIBILITY - uintmax_t hard_link_count(error_code& __ec) const noexcept { - return __get_nlink(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - file_time_type last_write_time() const { return __get_write_time(); } - - _LIBCPP_INLINE_VISIBILITY - file_time_type last_write_time(error_code& __ec) const noexcept { - return __get_write_time(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - file_status status() const { return __get_status(); } - - _LIBCPP_INLINE_VISIBILITY - file_status status(error_code& __ec) const noexcept { - return __get_status(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - file_status symlink_status() const { return __get_symlink_status(); } - - _LIBCPP_INLINE_VISIBILITY - file_status symlink_status(error_code& __ec) const noexcept { - return __get_symlink_status(&__ec); - } - - _LIBCPP_INLINE_VISIBILITY - bool operator<(directory_entry const& __rhs) const noexcept { - return __p_ < __rhs.__p_; - } - - _LIBCPP_INLINE_VISIBILITY - bool operator==(directory_entry const& __rhs) const noexcept { - return __p_ == __rhs.__p_; - } - - _LIBCPP_INLINE_VISIBILITY - bool operator!=(directory_entry const& __rhs) const noexcept { - return __p_ != __rhs.__p_; - } - - _LIBCPP_INLINE_VISIBILITY - bool operator<=(directory_entry const& __rhs) const noexcept { - return __p_ <= __rhs.__p_; - } - - _LIBCPP_INLINE_VISIBILITY - bool operator>(directory_entry const& __rhs) const noexcept { - return __p_ > __rhs.__p_; - } - - _LIBCPP_INLINE_VISIBILITY - bool operator>=(directory_entry const& __rhs) const noexcept { - return __p_ >= __rhs.__p_; - } - -private: - friend class directory_iterator; - friend class recursive_directory_iterator; - friend class __dir_stream; - - enum _CacheType : unsigned char { - _Empty, - _IterSymlink, - _IterNonSymlink, - _RefreshSymlink, - _RefreshSymlinkUnresolved, - _RefreshNonSymlink - }; - - struct __cached_data { - uintmax_t __size_; - uintmax_t __nlink_; - file_time_type __write_time_; - perms __sym_perms_; - perms __non_sym_perms_; - file_type __type_; - _CacheType __cache_type_; - - _LIBCPP_INLINE_VISIBILITY - __cached_data() noexcept { __reset(); } - - _LIBCPP_INLINE_VISIBILITY - void __reset() { - __cache_type_ = _Empty; - __type_ = file_type::none; - __sym_perms_ = __non_sym_perms_ = perms::unknown; - __size_ = __nlink_ = uintmax_t(-1); - __write_time_ = file_time_type::min(); - } - }; - - _LIBCPP_INLINE_VISIBILITY - static __cached_data __create_iter_result(file_type __ft) { - __cached_data __data; - __data.__type_ = __ft; - __data.__cache_type_ = [&]() { - switch (__ft) { - case file_type::none: - return _Empty; - case file_type::symlink: - return _IterSymlink; - default: - return _IterNonSymlink; - } - }(); - return __data; - } - - _LIBCPP_INLINE_VISIBILITY - void __assign_iter_entry(_Path&& __p, __cached_data __dt) { - __p_ = _VSTD::move(__p); - __data_ = __dt; - } - - _LIBCPP_FUNC_VIS - error_code __do_refresh() noexcept; - - _LIBCPP_INLINE_VISIBILITY - static bool __is_dne_error(error_code const& __ec) { - if (!__ec) - return true; - switch (static_cast<errc>(__ec.value())) { - case errc::no_such_file_or_directory: - case errc::not_a_directory: - return true; - default: - return false; - } - } - - _LIBCPP_INLINE_VISIBILITY - void __handle_error(const char* __msg, error_code* __dest_ec, - error_code const& __ec, bool __allow_dne = false) const { - if (__dest_ec) { - *__dest_ec = __ec; - return; - } - if (__ec && (!__allow_dne || !__is_dne_error(__ec))) - __throw_filesystem_error(__msg, __p_, __ec); - } - - _LIBCPP_INLINE_VISIBILITY - void __refresh(error_code* __ec = nullptr) { - __handle_error("in directory_entry::refresh", __ec, __do_refresh(), - /*allow_dne*/ true); - } - - _LIBCPP_INLINE_VISIBILITY - file_type __get_sym_ft(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - return __symlink_status(__p_, __ec).type(); - case _IterSymlink: - case _RefreshSymlink: - case _RefreshSymlinkUnresolved: - if (__ec) - __ec->clear(); - return file_type::symlink; - case _IterNonSymlink: - case _RefreshNonSymlink: - file_status __st(__data_.__type_); - if (__ec && !_VSTD_FS::exists(__st)) - *__ec = make_error_code(errc::no_such_file_or_directory); - else if (__ec) - __ec->clear(); - return __data_.__type_; - } - _LIBCPP_UNREACHABLE(); - } - - _LIBCPP_INLINE_VISIBILITY - file_type __get_ft(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - case _IterSymlink: - case _RefreshSymlinkUnresolved: - return __status(__p_, __ec).type(); - case _IterNonSymlink: - case _RefreshNonSymlink: - case _RefreshSymlink: { - file_status __st(__data_.__type_); - if (__ec && !_VSTD_FS::exists(__st)) - *__ec = make_error_code(errc::no_such_file_or_directory); - else if (__ec) - __ec->clear(); - return __data_.__type_; - } - } - _LIBCPP_UNREACHABLE(); - } - - _LIBCPP_INLINE_VISIBILITY - file_status __get_status(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - case _IterNonSymlink: - case _IterSymlink: - case _RefreshSymlinkUnresolved: - return __status(__p_, __ec); - case _RefreshNonSymlink: - case _RefreshSymlink: - return file_status(__get_ft(__ec), __data_.__non_sym_perms_); - } - _LIBCPP_UNREACHABLE(); - } - - _LIBCPP_INLINE_VISIBILITY - file_status __get_symlink_status(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - case _IterNonSymlink: - case _IterSymlink: - return __symlink_status(__p_, __ec); - case _RefreshNonSymlink: - return file_status(__get_sym_ft(__ec), __data_.__non_sym_perms_); - case _RefreshSymlink: - case _RefreshSymlinkUnresolved: - return file_status(__get_sym_ft(__ec), __data_.__sym_perms_); - } - _LIBCPP_UNREACHABLE(); - } - - _LIBCPP_INLINE_VISIBILITY - uintmax_t __get_size(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - case _IterNonSymlink: - case _IterSymlink: - case _RefreshSymlinkUnresolved: - return _VSTD_FS::__file_size(__p_, __ec); - case _RefreshSymlink: - case _RefreshNonSymlink: { - error_code __m_ec; - file_status __st(__get_ft(&__m_ec)); - __handle_error("in directory_entry::file_size", __ec, __m_ec); - if (_VSTD_FS::exists(__st) && !_VSTD_FS::is_regular_file(__st)) { - errc __err_kind = _VSTD_FS::is_directory(__st) ? errc::is_a_directory - : errc::not_supported; - __handle_error("in directory_entry::file_size", __ec, - make_error_code(__err_kind)); - } - return __data_.__size_; - } - } - _LIBCPP_UNREACHABLE(); - } - - _LIBCPP_INLINE_VISIBILITY - uintmax_t __get_nlink(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - case _IterNonSymlink: - case _IterSymlink: - case _RefreshSymlinkUnresolved: - return _VSTD_FS::__hard_link_count(__p_, __ec); - case _RefreshSymlink: - case _RefreshNonSymlink: { - error_code __m_ec; - (void)__get_ft(&__m_ec); - __handle_error("in directory_entry::hard_link_count", __ec, __m_ec); - return __data_.__nlink_; - } - } - _LIBCPP_UNREACHABLE(); - } - - _LIBCPP_INLINE_VISIBILITY - file_time_type __get_write_time(error_code* __ec = nullptr) const { - switch (__data_.__cache_type_) { - case _Empty: - case _IterNonSymlink: - case _IterSymlink: - case _RefreshSymlinkUnresolved: - return _VSTD_FS::__last_write_time(__p_, __ec); - case _RefreshSymlink: - case _RefreshNonSymlink: { - error_code __m_ec; - file_status __st(__get_ft(&__m_ec)); - __handle_error("in directory_entry::last_write_time", __ec, __m_ec); - if (_VSTD_FS::exists(__st) && - __data_.__write_time_ == file_time_type::min()) - __handle_error("in directory_entry::last_write_time", __ec, - make_error_code(errc::value_too_large)); - return __data_.__write_time_; - } - } - _LIBCPP_UNREACHABLE(); - } - -private: - _Path __p_; - __cached_data __data_; -}; - -class __dir_element_proxy { -public: - inline _LIBCPP_INLINE_VISIBILITY directory_entry operator*() { - return _VSTD::move(__elem_); - } - -private: - friend class directory_iterator; - friend class recursive_directory_iterator; - explicit __dir_element_proxy(directory_entry const& __e) : __elem_(__e) {} - __dir_element_proxy(__dir_element_proxy&& __o) - : __elem_(_VSTD::move(__o.__elem_)) {} - directory_entry __elem_; -}; - -class directory_iterator { -public: - typedef directory_entry value_type; - typedef ptrdiff_t difference_type; - typedef value_type const* pointer; - typedef value_type const& reference; - typedef input_iterator_tag iterator_category; - -public: - //ctor & dtor - directory_iterator() noexcept {} - - explicit directory_iterator(const path& __p) - : directory_iterator(__p, nullptr) {} - - directory_iterator(const path& __p, directory_options __opts) - : directory_iterator(__p, nullptr, __opts) {} - - directory_iterator(const path& __p, error_code& __ec) - : directory_iterator(__p, &__ec) {} - - directory_iterator(const path& __p, directory_options __opts, - error_code& __ec) - : directory_iterator(__p, &__ec, __opts) {} - - directory_iterator(const directory_iterator&) = default; - directory_iterator(directory_iterator&&) = default; - directory_iterator& operator=(const directory_iterator&) = default; - - directory_iterator& operator=(directory_iterator&& __o) noexcept { - // non-default implementation provided to support self-move assign. - if (this != &__o) { - __imp_ = _VSTD::move(__o.__imp_); - } - return *this; - } - - ~directory_iterator() = default; - - const directory_entry& operator*() const { - _LIBCPP_ASSERT(__imp_, "The end iterator cannot be dereferenced"); - return __dereference(); - } - - const directory_entry* operator->() const { return &**this; } - - directory_iterator& operator++() { return __increment(); } - - __dir_element_proxy operator++(int) { - __dir_element_proxy __p(**this); - __increment(); - return __p; - } - - directory_iterator& increment(error_code& __ec) { return __increment(&__ec); } - -private: - inline _LIBCPP_INLINE_VISIBILITY friend bool - operator==(const directory_iterator& __lhs, - const directory_iterator& __rhs) noexcept; - - // construct the dir_stream - _LIBCPP_FUNC_VIS - directory_iterator(const path&, error_code*, - directory_options = directory_options::none); - - _LIBCPP_FUNC_VIS - directory_iterator& __increment(error_code* __ec = nullptr); - - _LIBCPP_FUNC_VIS - const directory_entry& __dereference() const; - -private: - shared_ptr<__dir_stream> __imp_; -}; - -inline _LIBCPP_INLINE_VISIBILITY bool -operator==(const directory_iterator& __lhs, - const directory_iterator& __rhs) noexcept { - return __lhs.__imp_ == __rhs.__imp_; -} - -inline _LIBCPP_INLINE_VISIBILITY bool -operator!=(const directory_iterator& __lhs, - const directory_iterator& __rhs) noexcept { - return !(__lhs == __rhs); -} - -// enable directory_iterator range-based for statements -inline _LIBCPP_INLINE_VISIBILITY directory_iterator -begin(directory_iterator __iter) noexcept { - return __iter; -} - -inline _LIBCPP_INLINE_VISIBILITY directory_iterator -end(directory_iterator) noexcept { - return directory_iterator(); -} - -class recursive_directory_iterator { -public: - using value_type = directory_entry; - using difference_type = ptrdiff_t; - using pointer = directory_entry const*; - using reference = directory_entry const&; - using iterator_category = input_iterator_tag; - -public: - // constructors and destructor - _LIBCPP_INLINE_VISIBILITY - recursive_directory_iterator() noexcept : __rec_(false) {} - - _LIBCPP_INLINE_VISIBILITY - explicit recursive_directory_iterator( - const path& __p, directory_options __xoptions = directory_options::none) - : recursive_directory_iterator(__p, __xoptions, nullptr) {} - - _LIBCPP_INLINE_VISIBILITY - recursive_directory_iterator(const path& __p, directory_options __xoptions, - error_code& __ec) - : recursive_directory_iterator(__p, __xoptions, &__ec) {} - - _LIBCPP_INLINE_VISIBILITY - recursive_directory_iterator(const path& __p, error_code& __ec) - : recursive_directory_iterator(__p, directory_options::none, &__ec) {} - - recursive_directory_iterator(const recursive_directory_iterator&) = default; - recursive_directory_iterator(recursive_directory_iterator&&) = default; - - recursive_directory_iterator& - operator=(const recursive_directory_iterator&) = default; - - _LIBCPP_INLINE_VISIBILITY - recursive_directory_iterator& - operator=(recursive_directory_iterator&& __o) noexcept { - // non-default implementation provided to support self-move assign. - if (this != &__o) { - __imp_ = _VSTD::move(__o.__imp_); - __rec_ = __o.__rec_; - } - return *this; - } - - ~recursive_directory_iterator() = default; - - _LIBCPP_INLINE_VISIBILITY - const directory_entry& operator*() const { return __dereference(); } - - _LIBCPP_INLINE_VISIBILITY - const directory_entry* operator->() const { return &__dereference(); } - - recursive_directory_iterator& operator++() { return __increment(); } - - _LIBCPP_INLINE_VISIBILITY - __dir_element_proxy operator++(int) { - __dir_element_proxy __p(**this); - __increment(); - return __p; - } - - _LIBCPP_INLINE_VISIBILITY - recursive_directory_iterator& increment(error_code& __ec) { - return __increment(&__ec); - } - - _LIBCPP_FUNC_VIS directory_options options() const; - _LIBCPP_FUNC_VIS int depth() const; - - _LIBCPP_INLINE_VISIBILITY - void pop() { __pop(); } - - _LIBCPP_INLINE_VISIBILITY - void pop(error_code& __ec) { __pop(&__ec); } - - _LIBCPP_INLINE_VISIBILITY - bool recursion_pending() const { return __rec_; } - - _LIBCPP_INLINE_VISIBILITY - void disable_recursion_pending() { __rec_ = false; } - -private: - _LIBCPP_FUNC_VIS - recursive_directory_iterator(const path& __p, directory_options __opt, - error_code* __ec); - - _LIBCPP_FUNC_VIS - const directory_entry& __dereference() const; - - _LIBCPP_FUNC_VIS - bool __try_recursion(error_code* __ec); - - _LIBCPP_FUNC_VIS - void __advance(error_code* __ec = nullptr); - - _LIBCPP_FUNC_VIS - recursive_directory_iterator& __increment(error_code* __ec = nullptr); - - _LIBCPP_FUNC_VIS - void __pop(error_code* __ec = nullptr); - - inline _LIBCPP_INLINE_VISIBILITY friend bool - operator==(const recursive_directory_iterator&, - const recursive_directory_iterator&) noexcept; - - struct _LIBCPP_HIDDEN __shared_imp; - shared_ptr<__shared_imp> __imp_; - bool __rec_; -}; // class recursive_directory_iterator - -inline _LIBCPP_INLINE_VISIBILITY bool -operator==(const recursive_directory_iterator& __lhs, - const recursive_directory_iterator& __rhs) noexcept { - return __lhs.__imp_ == __rhs.__imp_; -} - -_LIBCPP_INLINE_VISIBILITY -inline bool operator!=(const recursive_directory_iterator& __lhs, - const recursive_directory_iterator& __rhs) noexcept { - return !(__lhs == __rhs); -} -// enable recursive_directory_iterator range-based for statements -inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator -begin(recursive_directory_iterator __iter) noexcept { - return __iter; -} - -inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator -end(recursive_directory_iterator) noexcept { - return recursive_directory_iterator(); -} - -_LIBCPP_AVAILABILITY_FILESYSTEM_POP - -_LIBCPP_END_NAMESPACE_FILESYSTEM - -#if !defined(_LIBCPP_HAS_NO_RANGES) -template <> -_LIBCPP_AVAILABILITY_FILESYSTEM -inline constexpr bool _VSTD::ranges::enable_borrowed_range<_VSTD_FS::directory_iterator> = true; -template <> -_LIBCPP_AVAILABILITY_FILESYSTEM -inline constexpr bool _VSTD::ranges::enable_borrowed_range<_VSTD_FS::recursive_directory_iterator> = true; - -template <> -_LIBCPP_AVAILABILITY_FILESYSTEM -inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::directory_iterator> = true; -template <> -_LIBCPP_AVAILABILITY_FILESYSTEM -inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::recursive_directory_iterator> = true; -#endif - -#endif // !_LIBCPP_CXX03_LANG - -_LIBCPP_POP_MACROS - #endif // _LIBCPP_FILESYSTEM diff --git a/libcxx/include/future b/libcxx/include/future index 99df8831a778..6b666a70f48e 100644 --- a/libcxx/include/future +++ b/libcxx/include/future @@ -366,7 +366,7 @@ template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>; #include <__debug> #include <__memory/allocator_arg_t.h> #include <__memory/uses_allocator.h> -#include <__utility/decay_copy.h> +#include <__utility/auto_cast.h> #include <__utility/forward.h> #include <chrono> #include <exception> @@ -2207,16 +2207,16 @@ async(launch __policy, _Fp&& __f, _Args&&... __args) { #endif if (__does_policy_contain(__policy, launch::async)) - return _VSTD::__make_async_assoc_state<_Rp>(_BF(_VSTD::__decay_copy(_VSTD::forward<_Fp>(__f)), - _VSTD::__decay_copy(_VSTD::forward<_Args>(__args))...)); + return _VSTD::__make_async_assoc_state<_Rp>(_BF(_LIBCPP_AUTO_CAST(_VSTD::forward<_Fp>(__f)), + _LIBCPP_AUTO_CAST(_VSTD::forward<_Args>(__args))...)); #ifndef _LIBCPP_NO_EXCEPTIONS } catch ( ... ) { if (__policy == launch::async) throw ; } #endif if (__does_policy_contain(__policy, launch::deferred)) - return _VSTD::__make_deferred_assoc_state<_Rp>(_BF(_VSTD::__decay_copy(_VSTD::forward<_Fp>(__f)), - _VSTD::__decay_copy(_VSTD::forward<_Args>(__args))...)); + return _VSTD::__make_deferred_assoc_state<_Rp>(_BF(_LIBCPP_AUTO_CAST(_VSTD::forward<_Fp>(__f)), + _LIBCPP_AUTO_CAST(_VSTD::forward<_Args>(__args))...)); return future<_Rp>{}; } diff --git a/libcxx/include/initializer_list b/libcxx/include/initializer_list index d867ee6af017..fefaf8cf8b6f 100644 --- a/libcxx/include/initializer_list +++ b/libcxx/include/initializer_list @@ -112,6 +112,6 @@ end(initializer_list<_Ep> __il) _NOEXCEPT #endif // !defined(_LIBCPP_CXX03_LANG) -} // std +} // namespace std #endif // _LIBCPP_INITIALIZER_LIST diff --git a/libcxx/include/ios b/libcxx/include/ios index b7d32946bff0..237d146dfb85 100644 --- a/libcxx/include/ios +++ b/libcxx/include/ios @@ -308,11 +308,9 @@ public: typedef void (*event_callback)(event, ios_base&, int __index); void register_callback(event_callback __fn, int __index); -private: - ios_base(const ios_base&); // = delete; - ios_base& operator=(const ios_base&); // = delete; + ios_base(const ios_base&) = delete; + ios_base& operator=(const ios_base&) = delete; -public: static bool sync_with_stdio(bool __sync = true); _LIBCPP_INLINE_VISIBILITY iostate rdstate() const; diff --git a/libcxx/include/istream b/libcxx/include/istream index 2f39e35f4646..de49d49e4564 100644 --- a/libcxx/include/istream +++ b/libcxx/include/istream @@ -291,15 +291,15 @@ class _LIBCPP_TEMPLATE_VIS basic_istream<_CharT, _Traits>::sentry { bool __ok_; - sentry(const sentry&); // = delete; - sentry& operator=(const sentry&); // = delete; - public: explicit sentry(basic_istream<_CharT, _Traits>& __is, bool __noskipws = false); // ~sentry() = default; _LIBCPP_INLINE_VISIBILITY explicit operator bool() const {return __ok_;} + + sentry(const sentry&) = delete; + sentry& operator=(const sentry&) = delete; }; template <class _CharT, class _Traits> diff --git a/libcxx/include/memory b/libcxx/include/memory index f12f3c70eadd..3ed1530f2a75 100644 --- a/libcxx/include/memory +++ b/libcxx/include/memory @@ -188,10 +188,22 @@ uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); template <class ForwardIterator, class T> void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); +template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel, class T> + requires constructible_from<iter_value_t<ForwardIterator>, const T&> +ForwardIterator ranges::uninitialized_fill(ForwardIterator first, Sentinel last, const T& x); // since C++20 + +template <nothrow-forward-range ForwardRange, class T> + requires constructible_from<range_value_t<ForwardRange>, const T&> +borrowed_iterator_t<ForwardRange> ranges::uninitialized_fill(ForwardRange&& range, const T& x); // since C++20 + template <class ForwardIterator, class Size, class T> ForwardIterator uninitialized_fill_n(ForwardIterator first, Size n, const T& x); +template <nothrow-forward-iterator ForwardIterator, class T> + requires constructible_from<iter_value_t<ForwardIterator>, const T&> +ForwardIterator ranges::uninitialized_fill_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20 + template <class T, class ...Args> constexpr T* construct_at(T* location, Args&& ...args); // since C++20 @@ -213,15 +225,39 @@ template <class InputIterator, class Size, class ForwardIterator> template <class ForwardIterator> void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); +template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel> + requires default_initializable<iter_value_t<ForwardIterator>> + ForwardIterator ranges::uninitialized_value_construct(ForwardIterator first, Sentinel last); // since C++20 + +template <nothrow-forward-range ForwardRange> + requires default_initializable<range_value_t<ForwardRange>> + borrowed_iterator_t<ForwardRange> ranges::uninitialized_value_construct(ForwardRange&& r); // since C++20 + template <class ForwardIterator, class Size> ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); +template <nothrow-forward-iterator ForwardIterator> + requires default_initializable<iter_value_t<ForwardIterator>> + ForwardIterator ranges::uninitialized_value_construct_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20 + template <class ForwardIterator> void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); +template <nothrow-forward-iterator ForwardIterator, nothrow-sentinel-for<ForwardIterator> Sentinel> + requires default_initializable<iter_value_t<ForwardIterator>> + ForwardIterator ranges::uninitialized_default_construct(ForwardIterator first, Sentinel last); // since C++20 + +template <nothrow-forward-range ForwardRange> + requires default_initializable<range_value_t<ForwardRange>> + borrowed_iterator_t<ForwardRange> ranges::uninitialized_default_construct(ForwardRange&& r); // since C++20 + template <class ForwardIterator, class Size> ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); +template <nothrow-forward-iterator ForwardIterator> + requires default_initializable<iter_value_t<ForwardIterator>> + ForwardIterator ranges::uninitialized_default_construct_n(ForwardIterator first, iter_difference_t<ForwardIterator> n); // since C++20 + template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 template<class X> @@ -669,8 +705,10 @@ void* align(size_t alignment, size_t size, void*& ptr, size_t& space); #include <__memory/allocator_arg_t.h> #include <__memory/allocator_traits.h> #include <__memory/compressed_pair.h> +#include <__memory/concepts.h> #include <__memory/construct_at.h> #include <__memory/pointer_traits.h> +#include <__memory/ranges_uninitialized_algorithms.h> #include <__memory/raw_storage_iterator.h> #include <__memory/shared_ptr.h> #include <__memory/temporary_buffer.h> @@ -831,9 +869,9 @@ _LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& // --- Helper for container swap -- template <typename _Alloc> -_LIBCPP_INLINE_VISIBILITY +_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) -#if _LIBCPP_STD_VER >= 14 +#if _LIBCPP_STD_VER > 11 _NOEXCEPT #else _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) @@ -844,13 +882,13 @@ void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) } template <typename _Alloc> -inline _LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} template <typename _Alloc> -inline _LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc & __a1, _Alloc & __a2) -#if _LIBCPP_STD_VER >= 14 +#if _LIBCPP_STD_VER > 11 _NOEXCEPT #else _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) diff --git a/libcxx/include/module.modulemap b/libcxx/include/module.modulemap index a4a264bd9147..1dc6db406a74 100644 --- a/libcxx/include/module.modulemap +++ b/libcxx/include/module.modulemap @@ -353,9 +353,9 @@ module std [system] { export * module __charconv { - module chars_format { private header "__charconv/chars_format.h" } + module chars_format { private header "__charconv/chars_format.h" } module from_chars_result { private header "__charconv/from_chars_result.h" } - module to_chars_result { private header "__charconv/to_chars_result.h" } + module to_chars_result { private header "__charconv/to_chars_result.h" } } } @@ -373,15 +373,15 @@ module std [system] { module __compare { module common_comparison_category { private header "__compare/common_comparison_category.h" } - module compare_three_way { private header "__compare/compare_three_way.h" } - module compare_three_way_result { private header "__compare/compare_three_way_result.h" } - module is_eq { private header "__compare/is_eq.h" } - module ordering { private header "__compare/ordering.h" } - module partial_order { private header "__compare/partial_order.h" } - module strong_order { private header "__compare/strong_order.h" } - module synth_three_way { private header "__compare/synth_three_way.h" } - module three_way_comparable { private header "__compare/three_way_comparable.h" } - module weak_order { private header "__compare/weak_order.h" } + module compare_three_way { private header "__compare/compare_three_way.h" } + module compare_three_way_result { private header "__compare/compare_three_way_result.h" } + module is_eq { private header "__compare/is_eq.h" } + module ordering { private header "__compare/ordering.h" } + module partial_order { private header "__compare/partial_order.h" } + module strong_order { private header "__compare/strong_order.h" } + module synth_three_way { private header "__compare/synth_three_way.h" } + module three_way_comparable { private header "__compare/three_way_comparable.h" } + module weak_order { private header "__compare/weak_order.h" } } } module complex { @@ -393,28 +393,28 @@ module std [system] { export * module __concepts { - module arithmetic { private header "__concepts/arithmetic.h" } - module assignable { private header "__concepts/assignable.h" } - module boolean_testable { private header "__concepts/boolean_testable.h" } - module class_or_enum { private header "__concepts/class_or_enum.h" } - module common_reference_with { private header "__concepts/common_reference_with.h" } - module common_with { private header "__concepts/common_with.h" } - module constructible { private header "__concepts/constructible.h" } - module convertible_to { private header "__concepts/convertible_to.h" } - module copyable { private header "__concepts/copyable.h" } - module derived_from { private header "__concepts/derived_from.h" } - module destructible { private header "__concepts/destructible.h" } - module different_from { private header "__concepts/different_from.h" } - module equality_comparable { private header "__concepts/equality_comparable.h" } - module invocable { private header "__concepts/invocable.h" } - module movable { private header "__concepts/movable.h" } - module predicate { private header "__concepts/predicate.h" } - module regular { private header "__concepts/regular.h" } - module relation { private header "__concepts/relation.h" } - module same_as { private header "__concepts/same_as.h" } - module semiregular { private header "__concepts/semiregular.h" } - module swappable { private header "__concepts/swappable.h" } - module totally_ordered { private header "__concepts/totally_ordered.h" } + module arithmetic { private header "__concepts/arithmetic.h" } + module assignable { private header "__concepts/assignable.h" } + module boolean_testable { private header "__concepts/boolean_testable.h" } + module class_or_enum { private header "__concepts/class_or_enum.h" } + module common_reference_with { private header "__concepts/common_reference_with.h" } + module common_with { private header "__concepts/common_with.h" } + module constructible { private header "__concepts/constructible.h" } + module convertible_to { private header "__concepts/convertible_to.h" } + module copyable { private header "__concepts/copyable.h" } + module derived_from { private header "__concepts/derived_from.h" } + module destructible { private header "__concepts/destructible.h" } + module different_from { private header "__concepts/different_from.h" } + module equality_comparable { private header "__concepts/equality_comparable.h" } + module invocable { private header "__concepts/invocable.h" } + module movable { private header "__concepts/movable.h" } + module predicate { private header "__concepts/predicate.h" } + module regular { private header "__concepts/regular.h" } + module relation { private header "__concepts/relation.h" } + module same_as { private header "__concepts/same_as.h" } + module semiregular { private header "__concepts/semiregular.h" } + module swappable { private header "__concepts/swappable.h" } + module totally_ordered { private header "__concepts/totally_ordered.h" } } } module condition_variable { @@ -428,10 +428,10 @@ module std [system] { export * module __coroutine { - module coroutine_handle { private header "__coroutine/coroutine_handle.h" } - module coroutine_traits { private header "__coroutine/coroutine_traits.h" } - module trivial_awaitables { private header "__coroutine/trivial_awaitables.h" } - module noop_coroutine_handle { private header "__coroutine/noop_coroutine_handle.h" } + module coroutine_handle { private header "__coroutine/coroutine_handle.h" } + module coroutine_traits { private header "__coroutine/coroutine_traits.h" } + module trivial_awaitables { private header "__coroutine/trivial_awaitables.h" } + module noop_coroutine_handle { private header "__coroutine/noop_coroutine_handle.h" } } } module deque { @@ -450,30 +450,49 @@ module std [system] { module filesystem { header "filesystem" export * + + module __filesystem { + module copy_options { private header "__filesystem/copy_options.h" } + module directory_entry { private header "__filesystem/directory_entry.h" } + module directory_iterator { private header "__filesystem/directory_iterator.h" } + module directory_options { private header "__filesystem/directory_options.h" } + module file_status { private header "__filesystem/file_status.h" } + module file_time_type { private header "__filesystem/file_time_type.h" } + module file_type { private header "__filesystem/file_type.h" } + module filesystem_error { private header "__filesystem/filesystem_error.h" } + module operations { private header "__filesystem/operations.h" } + module path_iterator { private header "__filesystem/path_iterator.h" } + module path { private header "__filesystem/path.h" } + module perm_options { private header "__filesystem/perm_options.h" } + module perms { private header "__filesystem/perms.h" } + module recursive_directory_iterator { private header "__filesystem/recursive_directory_iterator.h" } + module space_info { private header "__filesystem/space_info.h" } + module u8path { private header "__filesystem/u8path.h" } + } } module format { header "format" export * module __format { - module format_arg { private header "__format/format_arg.h" } - module format_args { private header "__format/format_args.h" } + module format_arg { private header "__format/format_arg.h" } + module format_args { private header "__format/format_args.h" } module format_context { private header "__format/format_context.h" export optional export locale } - module format_error { private header "__format/format_error.h" } - module format_fwd { private header "__format/format_fwd.h" } - module format_parse_context { private header "__format/format_parse_context.h" } - module format_string { private header "__format/format_string.h" } - module format_to_n_result { private header "__format/format_to_n_result.h" } - module formatter { private header "__format/formatter.h" } - module formatter_bool { private header "__format/formatter_bool.h" } - module formatter_char { private header "__format/formatter_char.h" } - module formatter_integer { private header "__format/formatter_integer.h" } - module formatter_integral { private header "__format/formatter_integral.h" } - module formatter_string { private header "__format/formatter_string.h" } + module format_error { private header "__format/format_error.h" } + module format_fwd { private header "__format/format_fwd.h" } + module format_parse_context { private header "__format/format_parse_context.h" } + module format_string { private header "__format/format_string.h" } + module format_to_n_result { private header "__format/format_to_n_result.h" } + module formatter { private header "__format/formatter.h" } + module formatter_bool { private header "__format/formatter_bool.h" } + module formatter_char { private header "__format/formatter_char.h" } + module formatter_integer { private header "__format/formatter_integer.h" } + module formatter_integral { private header "__format/formatter_integral.h" } + module formatter_string { private header "__format/formatter_string.h" } module parser_std_format_spec { private header "__format/parser_std_format_spec.h" } } } @@ -505,8 +524,8 @@ module std [system] { module identity { private header "__functional/identity.h" } module invoke { private header "__functional/invoke.h" } module is_transparent { private header "__functional/is_transparent.h" } - module mem_fn { private header "__functional/mem_fn.h" } - module mem_fun_ref { private header "__functional/mem_fun_ref.h" } + module mem_fn { private header "__functional/mem_fn.h" } + module mem_fun_ref { private header "__functional/mem_fun_ref.h" } module not_fn { private header "__functional/not_fn.h" } module operations { private header "__functional/operations.h" } module perfect_forward { private header "__functional/perfect_forward.h" } @@ -630,21 +649,27 @@ module std [system] { export * module __memory { - module addressof { private header "__memory/addressof.h" } - module allocation_guard { private header "__memory/allocation_guard.h" } - module allocator { private header "__memory/allocator.h" } - module allocator_arg_t { private header "__memory/allocator_arg_t.h" } - module allocator_traits { private header "__memory/allocator_traits.h" } - module auto_ptr { private header "__memory/auto_ptr.h" } - module compressed_pair { private header "__memory/compressed_pair.h" } - module construct_at { private header "__memory/construct_at.h" } - module pointer_traits { private header "__memory/pointer_traits.h" } - module raw_storage_iterator { private header "__memory/raw_storage_iterator.h" } - module shared_ptr { private header "__memory/shared_ptr.h" } - module temporary_buffer { private header "__memory/temporary_buffer.h" } - module uninitialized_algorithms { private header "__memory/uninitialized_algorithms.h" } - module unique_ptr { private header "__memory/unique_ptr.h" } - module uses_allocator { private header "__memory/uses_allocator.h" } + module addressof { private header "__memory/addressof.h" } + module allocation_guard { private header "__memory/allocation_guard.h" } + module allocator { private header "__memory/allocator.h" } + module allocator_arg_t { private header "__memory/allocator_arg_t.h" } + module allocator_traits { private header "__memory/allocator_traits.h" } + module auto_ptr { private header "__memory/auto_ptr.h" } + module compressed_pair { private header "__memory/compressed_pair.h" } + module concepts { private header "__memory/concepts.h" } + module construct_at { private header "__memory/construct_at.h" } + module pointer_traits { private header "__memory/pointer_traits.h" } + module ranges_uninitialized_algorithms { + private header "__memory/ranges_uninitialized_algorithms.h" + export __function_like + } + module raw_storage_iterator { private header "__memory/raw_storage_iterator.h" } + module shared_ptr { private header "__memory/shared_ptr.h" } + module temporary_buffer { private header "__memory/temporary_buffer.h" } + module uninitialized_algorithms { private header "__memory/uninitialized_algorithms.h" } + module unique_ptr { private header "__memory/unique_ptr.h" } + module uses_allocator { private header "__memory/uses_allocator.h" } + module voidify { private header "__memory/voidify.h" } } } module mutex { @@ -699,41 +724,42 @@ module std [system] { export * module __random { - module bernoulli_distribution { private header "__random/bernoulli_distribution.h" } - module binomial_distribution { private header "__random/binomial_distribution.h" } - module cauchy_distribution { private header "__random/cauchy_distribution.h" } - module chi_squared_distribution { private header "__random/chi_squared_distribution.h" } - module default_random_engine { private header "__random/default_random_engine.h" } - module discard_block_engine { private header "__random/discard_block_engine.h" } - module discrete_distribution { private header "__random/discrete_distribution.h" } - module exponential_distribution { private header "__random/exponential_distribution.h" } - module extreme_value_distribution { private header "__random/extreme_value_distribution.h" } - module fisher_f_distribution { private header "__random/fisher_f_distribution.h" } - module gamma_distribution { private header "__random/gamma_distribution.h" } - module generate_canonical { private header "__random/generate_canonical.h" } - module geometric_distribution { private header "__random/geometric_distribution.h" } - module independent_bits_engine { private header "__random/independent_bits_engine.h" } - module is_seed_sequence { private header "__random/is_seed_sequence.h" } - module knuth_b { private header "__random/knuth_b.h" } - module linear_congruential_engine { private header "__random/linear_congruential_engine.h" } - module log2 { private header "__random/log2.h" } - module lognormal_distribution { private header "__random/lognormal_distribution.h" } - module mersenne_twister_engine { private header "__random/mersenne_twister_engine.h" } - module negative_binomial_distribution { private header "__random/negative_binomial_distribution.h" } - module normal_distribution { private header "__random/normal_distribution.h" } + module bernoulli_distribution { private header "__random/bernoulli_distribution.h" } + module binomial_distribution { private header "__random/binomial_distribution.h" } + module cauchy_distribution { private header "__random/cauchy_distribution.h" } + module chi_squared_distribution { private header "__random/chi_squared_distribution.h" } + module clamp_to_integral { private header "__random/clamp_to_integral.h" } + module default_random_engine { private header "__random/default_random_engine.h" } + module discard_block_engine { private header "__random/discard_block_engine.h" } + module discrete_distribution { private header "__random/discrete_distribution.h" } + module exponential_distribution { private header "__random/exponential_distribution.h" } + module extreme_value_distribution { private header "__random/extreme_value_distribution.h" } + module fisher_f_distribution { private header "__random/fisher_f_distribution.h" } + module gamma_distribution { private header "__random/gamma_distribution.h" } + module generate_canonical { private header "__random/generate_canonical.h" } + module geometric_distribution { private header "__random/geometric_distribution.h" } + module independent_bits_engine { private header "__random/independent_bits_engine.h" } + module is_seed_sequence { private header "__random/is_seed_sequence.h" } + module knuth_b { private header "__random/knuth_b.h" } + module linear_congruential_engine { private header "__random/linear_congruential_engine.h" } + module log2 { private header "__random/log2.h" } + module lognormal_distribution { private header "__random/lognormal_distribution.h" } + module mersenne_twister_engine { private header "__random/mersenne_twister_engine.h" } + module negative_binomial_distribution { private header "__random/negative_binomial_distribution.h" } + module normal_distribution { private header "__random/normal_distribution.h" } module piecewise_constant_distribution { private header "__random/piecewise_constant_distribution.h" } - module piecewise_linear_distribution { private header "__random/piecewise_linear_distribution.h" } - module poisson_distribution { private header "__random/poisson_distribution.h" } - module random_device { private header "__random/random_device.h" } - module ranlux { private header "__random/ranlux.h" } - module seed_seq { private header "__random/seed_seq.h" } - module shuffle_order_engine { private header "__random/shuffle_order_engine.h" } - module student_t_distribution { private header "__random/student_t_distribution.h" } - module subtract_with_carry_engine { private header "__random/subtract_with_carry_engine.h" } - module uniform_int_distribution { private header "__random/uniform_int_distribution.h" } - module uniform_random_bit_generator { private header "__random/uniform_random_bit_generator.h" } - module uniform_real_distribution { private header "__random/uniform_real_distribution.h" } - module weibull_distribution { private header "__random/weibull_distribution.h" } + module piecewise_linear_distribution { private header "__random/piecewise_linear_distribution.h" } + module poisson_distribution { private header "__random/poisson_distribution.h" } + module random_device { private header "__random/random_device.h" } + module ranlux { private header "__random/ranlux.h" } + module seed_seq { private header "__random/seed_seq.h" } + module shuffle_order_engine { private header "__random/shuffle_order_engine.h" } + module student_t_distribution { private header "__random/student_t_distribution.h" } + module subtract_with_carry_engine { private header "__random/subtract_with_carry_engine.h" } + module uniform_int_distribution { private header "__random/uniform_int_distribution.h" } + module uniform_random_bit_generator { private header "__random/uniform_random_bit_generator.h" } + module uniform_real_distribution { private header "__random/uniform_real_distribution.h" } + module weibull_distribution { private header "__random/weibull_distribution.h" } } } module ranges { @@ -744,39 +770,42 @@ module std [system] { export * module __ranges { - module access { private header "__ranges/access.h" } + module access { private header "__ranges/access.h" } module all { private header "__ranges/all.h" export functional.__functional.compose export functional.__functional.perfect_forward } - module common_view { private header "__ranges/common_view.h" } - module concepts { private header "__ranges/concepts.h" } - module copyable_box { private header "__ranges/copyable_box.h" } - module counted { private header "__ranges/counted.h" } - module dangling { private header "__ranges/dangling.h" } - module data { private header "__ranges/data.h" } - module drop_view { private header "__ranges/drop_view.h" } - module empty { private header "__ranges/empty.h" } - module empty_view { private header "__ranges/empty_view.h" } + module common_view { private header "__ranges/common_view.h" } + module concepts { private header "__ranges/concepts.h" } + module copyable_box { private header "__ranges/copyable_box.h" } + module counted { + private header "__ranges/counted.h" + export span + } + module dangling { private header "__ranges/dangling.h" } + module data { private header "__ranges/data.h" } + module drop_view { private header "__ranges/drop_view.h" } + module empty { private header "__ranges/empty.h" } + module empty_view { private header "__ranges/empty_view.h" } module enable_borrowed_range { private header "__ranges/enable_borrowed_range.h" } - module enable_view { private header "__ranges/enable_view.h" } - module iota_view { private header "__ranges/iota_view.h" } - module join_view { private header "__ranges/join_view.h" } + module enable_view { private header "__ranges/enable_view.h" } + module iota_view { private header "__ranges/iota_view.h" } + module join_view { private header "__ranges/join_view.h" } module non_propagating_cache { private header "__ranges/non_propagating_cache.h" } - module range_adaptor { private header "__ranges/range_adaptor.h" } - module ref_view { private header "__ranges/ref_view.h" } - module reverse_view { private header "__ranges/reverse_view.h" } - module size { private header "__ranges/size.h" } - module single_view { private header "__ranges/single_view.h" } - module subrange { private header "__ranges/subrange.h" } - module take_view { private header "__ranges/take_view.h" } + module range_adaptor { private header "__ranges/range_adaptor.h" } + module ref_view { private header "__ranges/ref_view.h" } + module reverse_view { private header "__ranges/reverse_view.h" } + module size { private header "__ranges/size.h" } + module single_view { private header "__ranges/single_view.h" } + module subrange { private header "__ranges/subrange.h" } + module take_view { private header "__ranges/take_view.h" } module transform_view { private header "__ranges/transform_view.h" export functional.__functional.bind_back export functional.__functional.perfect_forward } - module view_interface { private header "__ranges/view_interface.h" } + module view_interface { private header "__ranges/view_interface.h" } } } module ratio { @@ -891,21 +920,22 @@ module std [system] { export * module __utility { - module as_const { private header "__utility/as_const.h" } - module cmp { private header "__utility/cmp.h" } - module decay_copy { private header "__utility/decay_copy.h" } - module declval { private header "__utility/declval.h" } - module exchange { private header "__utility/exchange.h" } - module forward { private header "__utility/forward.h" } - module in_place { private header "__utility/in_place.h" } - module integer_sequence { private header "__utility/integer_sequence.h" } - module move { private header "__utility/move.h" } - module pair { private header "__utility/pair.h" } + module as_const { private header "__utility/as_const.h" } + module auto_cast { private header "__utility/auto_cast.h" } + module cmp { private header "__utility/cmp.h" } + module declval { private header "__utility/declval.h" } + module exchange { private header "__utility/exchange.h" } + module forward { private header "__utility/forward.h" } + module in_place { private header "__utility/in_place.h" } + module integer_sequence { private header "__utility/integer_sequence.h" } + module move { private header "__utility/move.h" } + module pair { private header "__utility/pair.h" } module piecewise_construct { private header "__utility/piecewise_construct.h" } - module priority_tag { private header "__utility/priority_tag.h" } - module rel_ops { private header "__utility/rel_ops.h" } - module swap { private header "__utility/swap.h" } - module to_underlying { private header "__utility/to_underlying.h" } + module priority_tag { private header "__utility/priority_tag.h" } + module rel_ops { private header "__utility/rel_ops.h" } + module swap { private header "__utility/swap.h" } + module to_underlying { private header "__utility/to_underlying.h" } + module transaction { private header "__utility/transaction.h" } } } module valarray { @@ -936,22 +966,22 @@ module std [system] { module __availability { private header "__availability" export * } module __bit_reference { private header "__bit_reference" export * } module __bits { private header "__bits" export * } - module __debug { header "__debug" export * } + module __debug { header "__debug" export * } module __errc { private header "__errc" export * } module __function_like { private header "__function_like.h" export * } - module __hash_table { header "__hash_table" export * } + module __hash_table { header "__hash_table" export * } module __locale { private header "__locale" export * } module __mbstate { private header "__mbstate_t.h" export * } module __mutex_base { private header "__mutex_base" export * } module __node_handle { private header "__node_handle" export * } - module __nullptr { header "__nullptr" export * } + module __nullptr { header "__nullptr" export * } module __split_buffer { private header "__split_buffer" export * } module __std_stream { private header "__std_stream" export * } module __string { private header "__string" export * } - module __threading_support { header "__threading_support" export * } - module __tree { header "__tree" export * } + module __threading_support { header "__threading_support" export * } + module __tree { header "__tree" export * } module __tuple { private header "__tuple" export * } - module __undef_macros { header "__undef_macros" export * } + module __undef_macros { header "__undef_macros" export * } module experimental { requires cplusplus11 diff --git a/libcxx/include/mutex b/libcxx/include/mutex index 822abe1a3f17..b2a4d7993e0d 100644 --- a/libcxx/include/mutex +++ b/libcxx/include/mutex @@ -215,14 +215,12 @@ class _LIBCPP_TYPE_VIS recursive_mutex __libcpp_recursive_mutex_t __m_; public: - recursive_mutex(); - ~recursive_mutex(); + recursive_mutex(); + ~recursive_mutex(); -private: - recursive_mutex(const recursive_mutex&); // = delete; - recursive_mutex& operator=(const recursive_mutex&); // = delete; + recursive_mutex(const recursive_mutex&) = delete; + recursive_mutex& operator=(const recursive_mutex&) = delete; -public: void lock(); bool try_lock() _NOEXCEPT; void unlock() _NOEXCEPT; @@ -242,9 +240,8 @@ public: timed_mutex(); ~timed_mutex(); -private: - timed_mutex(const timed_mutex&); // = delete; - timed_mutex& operator=(const timed_mutex&); // = delete; + timed_mutex(const timed_mutex&) = delete; + timed_mutex& operator=(const timed_mutex&) = delete; public: void lock(); @@ -283,14 +280,12 @@ class _LIBCPP_TYPE_VIS recursive_timed_mutex size_t __count_; __thread_id __id_; public: - recursive_timed_mutex(); - ~recursive_timed_mutex(); + recursive_timed_mutex(); + ~recursive_timed_mutex(); -private: - recursive_timed_mutex(const recursive_timed_mutex&); // = delete; - recursive_timed_mutex& operator=(const recursive_timed_mutex&); // = delete; + recursive_timed_mutex(const recursive_timed_mutex&) = delete; + recursive_timed_mutex& operator=(const recursive_timed_mutex&) = delete; -public: void lock(); bool try_lock() _NOEXCEPT; template <class _Rep, class _Period> @@ -576,6 +571,8 @@ struct _LIBCPP_TEMPLATE_VIS once_flag _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR once_flag() _NOEXCEPT : __state_(0) {} + once_flag(const once_flag&) = delete; + once_flag& operator=(const once_flag&) = delete; #if defined(_LIBCPP_ABI_MICROSOFT) typedef uintptr_t _State_type; @@ -583,11 +580,7 @@ struct _LIBCPP_TEMPLATE_VIS once_flag typedef unsigned long _State_type; #endif - private: - once_flag(const once_flag&); // = delete; - once_flag& operator=(const once_flag&); // = delete; - _State_type __state_; #ifndef _LIBCPP_CXX03_LANG diff --git a/libcxx/include/new b/libcxx/include/new index 593af9d5c619..be0d972f42da 100644 --- a/libcxx/include/new +++ b/libcxx/include/new @@ -177,7 +177,7 @@ struct destroying_delete_t { inline constexpr destroying_delete_t destroying_delete{}; #endif // _LIBCPP_STD_VER > 17 -} // std +} // namespace std #if defined(_LIBCPP_CXX03_LANG) #define _THROW_BAD_ALLOC throw(std::bad_alloc) diff --git a/libcxx/include/optional b/libcxx/include/optional index 837f867328fb..63753d9f9f03 100644 --- a/libcxx/include/optional +++ b/libcxx/include/optional @@ -132,6 +132,18 @@ namespace std { template <class U> constexpr T value_or(U &&) const &; template <class U> constexpr T value_or(U &&) &&; + // [optional.monadic], monadic operations + template<class F> constexpr auto and_then(F&& f) &; // since C++23 + template<class F> constexpr auto and_then(F&& f) &&; // since C++23 + template<class F> constexpr auto and_then(F&& f) const&; // since C++23 + template<class F> constexpr auto and_then(F&& f) const&&; // since C++23 + template<class F> constexpr auto transform(F&& f) &; // since C++23 + template<class F> constexpr auto transform(F&& f) &&; // since C++23 + template<class F> constexpr auto transform(F&& f) const&; // since C++23 + template<class F> constexpr auto transform(F&& f) const&&; // since C++23 + template<class F> constexpr optional or_else(F&& f) &&; // since C++23 + template<class F> constexpr optional or_else(F&& f) const&; // since C++23 + // 23.6.3.6, modifiers void reset() noexcept; // constexpr in C++20 @@ -147,6 +159,7 @@ template<class T> */ #include <__availability> +#include <__concepts/invocable.h> #include <__config> #include <__debug> #include <__functional_base> @@ -175,7 +188,7 @@ public: virtual const char* what() const _NOEXCEPT; }; -} // std +} // namespace std #if _LIBCPP_STD_VER > 14 @@ -200,6 +213,8 @@ struct nullopt_t inline constexpr nullopt_t nullopt{nullopt_t::__secret_tag{}, nullopt_t::__secret_tag{}}; +struct __optional_construct_from_invoke_tag {}; + template <class _Tp, bool = is_trivially_destructible<_Tp>::value> struct __optional_destruct_base; @@ -234,6 +249,13 @@ struct __optional_destruct_base<_Tp, false> : __val_(_VSTD::forward<_Args>(__args)...), __engaged_(true) {} +#if _LIBCPP_STD_VER > 20 + template <class _Fp, class... _Args> + _LIBCPP_HIDE_FROM_ABI + constexpr __optional_destruct_base(__optional_construct_from_invoke_tag, _Fp&& __f, _Args&&... __args) + : __val_(_VSTD::invoke(_VSTD::forward<_Fp>(__f), _VSTD::forward<_Args>(__args)...)), __engaged_(true) {} +#endif + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 void reset() noexcept { @@ -269,6 +291,13 @@ struct __optional_destruct_base<_Tp, true> : __val_(_VSTD::forward<_Args>(__args)...), __engaged_(true) {} +#if _LIBCPP_STD_VER > 20 + template <class _Fp, class... _Args> + _LIBCPP_HIDE_FROM_ABI + constexpr __optional_destruct_base(__optional_construct_from_invoke_tag, _Fp&& __f, _Args&&... __args) + : __val_(_VSTD::invoke(_VSTD::forward<_Fp>(__f), _VSTD::forward<_Args>(__args)...)), __engaged_(true) {} +#endif + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 void reset() noexcept { @@ -582,6 +611,12 @@ using __optional_sfinae_assign_base_t = __sfinae_assign_base< (is_move_constructible<_Tp>::value && is_move_assignable<_Tp>::value) >; +template<class _Tp> +class optional; +template <class _Tp> +struct __is_std_optional : false_type {}; +template <class _Tp> struct __is_std_optional<optional<_Tp>> : true_type {}; + template <class _Tp> class optional : private __optional_move_assign_base<_Tp> @@ -684,6 +719,7 @@ private: _CheckOptionalLikeConstructor<_QualUp>, __check_tuple_constructor_fail >; + public: _LIBCPP_INLINE_VISIBILITY constexpr optional() noexcept {} @@ -759,6 +795,14 @@ public: this->__construct_from(_VSTD::move(__v)); } +#if _LIBCPP_STD_VER > 20 + template<class _Fp, class... _Args> + _LIBCPP_HIDE_FROM_ABI + constexpr explicit optional(__optional_construct_from_invoke_tag, _Fp&& __f, _Args&&... __args) + : __base(__optional_construct_from_invoke_tag{}, _VSTD::forward<_Fp>(__f), _VSTD::forward<_Args>(__args)...) { + } +#endif + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 optional& operator=(nullopt_t) noexcept { @@ -993,6 +1037,132 @@ public: static_cast<value_type>(_VSTD::forward<_Up>(__v)); } +#if _LIBCPP_STD_VER > 20 + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto and_then(_Func&& __f) & { + using _Up = invoke_result_t<_Func, value_type&>; + static_assert(__is_std_optional<remove_cvref_t<_Up>>::value, + "Result of f(value()) must be a specialization of std::optional"); + if (*this) + return _VSTD::invoke(_VSTD::forward<_Func>(__f), value()); + return remove_cvref_t<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto and_then(_Func&& __f) const& { + using _Up = invoke_result_t<_Func, const value_type&>; + static_assert(__is_std_optional<remove_cvref_t<_Up>>::value, + "Result of f(value()) must be a specialization of std::optional"); + if (*this) + return _VSTD::invoke(_VSTD::forward<_Func>(__f), value()); + return remove_cvref_t<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto and_then(_Func&& __f) && { + using _Up = invoke_result_t<_Func, value_type&&>; + static_assert(__is_std_optional<remove_cvref_t<_Up>>::value, + "Result of f(std::move(value())) must be a specialization of std::optional"); + if (*this) + return _VSTD::invoke(_VSTD::forward<_Func>(__f), _VSTD::move(value())); + return remove_cvref_t<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto and_then(_Func&& __f) const&& { + using _Up = invoke_result_t<_Func, const value_type&&>; + static_assert(__is_std_optional<remove_cvref_t<_Up>>::value, + "Result of f(std::move(value())) must be a specialization of std::optional"); + if (*this) + return _VSTD::invoke(_VSTD::forward<_Func>(__f), _VSTD::move(value())); + return remove_cvref_t<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto transform(_Func&& __f) & { + using _Up = remove_cv_t<invoke_result_t<_Func, value_type&>>; + static_assert(!is_array_v<_Up>, "Result of f(value()) should not be an Array"); + static_assert(!is_same_v<_Up, in_place_t>, + "Result of f(value()) should not be std::in_place_t"); + static_assert(!is_same_v<_Up, nullopt_t>, + "Result of f(value()) should not be std::nullopt_t"); + static_assert(is_object_v<_Up>, "Result of f(value()) should be an object type"); + if (*this) + return optional<_Up>(__optional_construct_from_invoke_tag{}, _VSTD::forward<_Func>(__f), value()); + return optional<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto transform(_Func&& __f) const& { + using _Up = remove_cv_t<invoke_result_t<_Func, const value_type&>>; + static_assert(!is_array_v<_Up>, "Result of f(value()) should not be an Array"); + static_assert(!is_same_v<_Up, in_place_t>, + "Result of f(value()) should not be std::in_place_t"); + static_assert(!is_same_v<_Up, nullopt_t>, + "Result of f(value()) should not be std::nullopt_t"); + static_assert(is_object_v<_Up>, "Result of f(value()) should be an object type"); + if (*this) + return optional<_Up>(__optional_construct_from_invoke_tag{}, _VSTD::forward<_Func>(__f), value()); + return optional<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto transform(_Func&& __f) && { + using _Up = remove_cv_t<invoke_result_t<_Func, value_type&&>>; + static_assert(!is_array_v<_Up>, "Result of f(std::move(value())) should not be an Array"); + static_assert(!is_same_v<_Up, in_place_t>, + "Result of f(std::move(value())) should not be std::in_place_t"); + static_assert(!is_same_v<_Up, nullopt_t>, + "Result of f(std::move(value())) should not be std::nullopt_t"); + static_assert(is_object_v<_Up>, "Result of f(std::move(value())) should be an object type"); + if (*this) + return optional<_Up>(__optional_construct_from_invoke_tag{}, _VSTD::forward<_Func>(__f), _VSTD::move(value())); + return optional<_Up>(); + } + + template<class _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr auto transform(_Func&& __f) const&& { + using _Up = remove_cvref_t<invoke_result_t<_Func, const value_type&&>>; + static_assert(!is_array_v<_Up>, "Result of f(std::move(value())) should not be an Array"); + static_assert(!is_same_v<_Up, in_place_t>, + "Result of f(std::move(value())) should not be std::in_place_t"); + static_assert(!is_same_v<_Up, nullopt_t>, + "Result of f(std::move(value())) should not be std::nullopt_t"); + static_assert(is_object_v<_Up>, "Result of f(std::move(value())) should be an object type"); + if (*this) + return optional<_Up>(__optional_construct_from_invoke_tag{}, _VSTD::forward<_Func>(__f), _VSTD::move(value())); + return optional<_Up>(); + } + + template<invocable _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr optional or_else(_Func&& __f) const& requires is_copy_constructible_v<value_type> { + static_assert(is_same_v<remove_cvref_t<invoke_result_t<_Func>>, optional>, + "Result of f() should be the same type as this optional"); + if (*this) + return *this; + return _VSTD::forward<_Func>(__f)(); + } + + template<invocable _Func> + _LIBCPP_HIDE_FROM_ABI + constexpr optional or_else(_Func&& __f) && requires is_move_constructible_v<value_type> { + static_assert(is_same_v<remove_cvref_t<invoke_result_t<_Func>>, optional>, + "Result of f() should be the same type as this optional"); + if (*this) + return _VSTD::move(*this); + return _VSTD::forward<_Func>(__f)(); + } +#endif // _LIBCPP_STD_VER > 20 + using __base::reset; }; diff --git a/libcxx/include/ostream b/libcxx/include/ostream index 98f36ea7acc1..d948d591c8f0 100644 --- a/libcxx/include/ostream +++ b/libcxx/include/ostream @@ -249,12 +249,11 @@ class _LIBCPP_TEMPLATE_VIS basic_ostream<_CharT, _Traits>::sentry bool __ok_; basic_ostream<_CharT, _Traits>& __os_; - sentry(const sentry&); // = delete; - sentry& operator=(const sentry&); // = delete; - public: explicit sentry(basic_ostream<_CharT, _Traits>& __os); ~sentry(); + sentry(const sentry&) = delete; + sentry& operator=(const sentry&) = delete; _LIBCPP_INLINE_VISIBILITY explicit operator bool() const {return __ok_;} diff --git a/libcxx/include/random b/libcxx/include/random index 9eb70bac00b9..c88bfce03b19 100644 --- a/libcxx/include/random +++ b/libcxx/include/random @@ -1682,6 +1682,7 @@ class piecewise_linear_distribution #include <__random/binomial_distribution.h> #include <__random/cauchy_distribution.h> #include <__random/chi_squared_distribution.h> +#include <__random/clamp_to_integral.h> #include <__random/default_random_engine.h> #include <__random/discard_block_engine.h> #include <__random/discrete_distribution.h> diff --git a/libcxx/include/regex b/libcxx/include/regex index 815ff7d3862d..8203c81659c8 100644 --- a/libcxx/include/regex +++ b/libcxx/include/regex @@ -978,7 +978,7 @@ enum error_type __re_err_parse }; -} // regex_constants +} // namespace regex_constants class _LIBCPP_EXCEPTION_ABI regex_error : public runtime_error diff --git a/libcxx/include/stdexcept b/libcxx/include/stdexcept index ddbc6303b624..c1dc05669bb9 100644 --- a/libcxx/include/stdexcept +++ b/libcxx/include/stdexcept @@ -209,7 +209,7 @@ public: #endif }; -} // std +} // namespace std _LIBCPP_BEGIN_NAMESPACE_STD diff --git a/libcxx/include/string b/libcxx/include/string index 313a7b5c2376..9049d7acbb9b 100644 --- a/libcxx/include/string +++ b/libcxx/include/string @@ -826,9 +826,10 @@ public: basic_string(const _CharT* __s) : __r_(__default_init_tag(), __default_init_tag()) { _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*) detected nullptr"); __init(__s, traits_type::length(__s)); -# if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); -# endif +#if _LIBCPP_DEBUG_LEVEL == 2 + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); +#endif } template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > @@ -1694,6 +1695,13 @@ private: return *this; } + _LIBCPP_HIDE_FROM_ABI basic_string& __null_terminate_at(value_type* __p, size_type __newsz) { + __set_size(__newsz); + __invalidate_iterators_past(__newsz); + traits_type::assign(__p[__newsz], value_type()); + return *this; + } + _LIBCPP_INLINE_VISIBILITY void __invalidate_all_iterators(); _LIBCPP_INLINE_VISIBILITY void __invalidate_iterators_past(size_type); @@ -1778,7 +1786,8 @@ void basic_string<_CharT, _Traits, _Allocator>::__invalidate_all_iterators() { #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__invalidate_all(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__invalidate_all(this); #endif } @@ -1788,22 +1797,24 @@ void basic_string<_CharT, _Traits, _Allocator>::__invalidate_iterators_past(size_type __pos) { #if _LIBCPP_DEBUG_LEVEL == 2 - __c_node* __c = __get_db()->__find_c_and_lock(this); - if (__c) - { - const_pointer __new_last = __get_pointer() + __pos; - for (__i_node** __p = __c->end_; __p != __c->beg_; ) + if (!__libcpp_is_constant_evaluated()) { + __c_node* __c = __get_db()->__find_c_and_lock(this); + if (__c) { - --__p; - const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_); - if (__i->base() > __new_last) + const_pointer __new_last = __get_pointer() + __pos; + for (__i_node** __p = __c->end_; __p != __c->beg_; ) { - (*__p)->__c_ = nullptr; - if (--__c->end_ != __p) - _VSTD::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*)); + --__p; + const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_); + if (__i->base() > __new_last) + { + (*__p)->__c_ = nullptr; + if (--__c->end_ != __p) + _VSTD::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*)); + } } + __get_db()->unlock(); } - __get_db()->unlock(); } #else (void)__pos; @@ -1817,7 +1828,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string() : __r_(__default_init_tag(), __default_init_tag()) { #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif __zero(); } @@ -1833,7 +1845,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __ : __r_(__default_init_tag(), __a) { #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif __zero(); } @@ -1895,7 +1908,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, const _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); __init(__s, traits_type::length(__s)); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -1904,10 +1918,11 @@ inline basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, size_type __n) : __r_(__default_init_tag(), __default_init_tag()) { - _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); - __init(__s, __n); + _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); + __init(__s, __n); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -1919,7 +1934,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, size_ _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); __init(__s, __n); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -1934,7 +1950,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __st __str.__get_long_size()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -1949,7 +1966,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string( __init_copy_ctor_external(_VSTD::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -1986,9 +2004,11 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(basic_string&& __str) { __str.__zero(); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); - if (__is_long()) - __get_db()->swap(this, &__str); + if (!__libcpp_is_constant_evaluated()) { + __get_db()->__insert_c(this); + if (__is_long()) + __get_db()->swap(this, &__str); + } #endif } @@ -2005,9 +2025,11 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(basic_string&& __str, co __str.__zero(); } #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); - if (__is_long()) - __get_db()->swap(this, &__str); + if (!__libcpp_is_constant_evaluated()) { + __get_db()->__insert_c(this); + if (__is_long()) + __get_db()->swap(this, &__str); + } #endif } @@ -2044,7 +2066,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(size_type __n, _CharT __ { __init(__n, __c); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2055,7 +2078,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(size_type __n, _CharT __ { __init(__n, __c); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2070,7 +2094,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __st this->__throw_out_of_range(); __init(__str.data() + __pos, _VSTD::min(__n, __str_sz - __pos)); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2085,7 +2110,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __st this->__throw_out_of_range(); __init(__str.data() + __pos, __str_sz - __pos); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2099,7 +2125,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string( __self_view __sv = __sv0.substr(__pos, __n); __init(__sv.data(), __sv.size()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2111,7 +2138,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const _Tp & __t) __self_view __sv = __t; __init(__sv.data(), __sv.size()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2123,7 +2151,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(const _Tp & __t, const _ __self_view __sv = __t; __init(__sv.data(), __sv.size()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2205,7 +2234,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(_InputIterator __first, { __init(__first, __last); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2218,7 +2248,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string(_InputIterator __first, { __init(__first, __last); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2232,7 +2263,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string( { __init(__il.begin(), __il.end()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2245,7 +2277,8 @@ basic_string<_CharT, _Traits, _Allocator>::basic_string( { __init(__il.begin(), __il.end()); #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__insert_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__insert_c(this); #endif } @@ -2255,7 +2288,8 @@ template <class _CharT, class _Traits, class _Allocator> basic_string<_CharT, _Traits, _Allocator>::~basic_string() { #if _LIBCPP_DEBUG_LEVEL == 2 - __get_db()->__erase_c(this); + if (!__libcpp_is_constant_evaluated()) + __get_db()->__erase_c(this); #endif if (__is_long()) __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); @@ -2351,14 +2385,12 @@ basic_string<_CharT, _Traits, _Allocator>::__assign_external( if (__cap >= __n) { value_type* __p = _VSTD::__to_address(__get_pointer()); traits_type::move(__p, __s, __n); - traits_type::assign(__p[__n], value_type()); - __set_size(__n); - __invalidate_iterators_past(__n); + return __null_terminate_at(__p, __n); } else { size_type __sz = size(); __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); + return *this; } - return *this; } template <class _CharT, class _Traits, class _Allocator> @@ -2383,10 +2415,7 @@ basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) } value_type* __p = _VSTD::__to_address(__get_pointer()); traits_type::assign(__p, __n, __c); - traits_type::assign(__p[__n], value_type()); - __set_size(__n); - __invalidate_iterators_past(__n); - return *this; + return __null_terminate_at(__p, __n); } template <class _CharT, class _Traits, class _Allocator> @@ -2826,13 +2855,11 @@ __enable_if_t > basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) { -#if _LIBCPP_DEBUG_LEVEL == 2 - _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, - "string::insert(iterator, range) called with an iterator not" - " referring to this string"); -#endif - const basic_string __temp(__first, __last, __alloc()); - return insert(__pos, __temp.data(), __temp.data() + __temp.size()); + _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, + "string::insert(iterator, range) called with an iterator not" + " referring to this string"); + const basic_string __temp(__first, __last, __alloc()); + return insert(__pos, __temp.data(), __temp.data() + __temp.size()); } template <class _CharT, class _Traits, class _Allocator> @@ -2844,11 +2871,10 @@ __enable_if_t > basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) { -#if _LIBCPP_DEBUG_LEVEL == 2 - _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, - "string::insert(iterator, range) called with an iterator not" - " referring to this string"); -#endif + _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, + "string::insert(iterator, range) called with an iterator not" + " referring to this string"); + size_type __ip = static_cast<size_type>(__pos - begin()); size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last)); if (__n) @@ -2961,14 +2987,12 @@ inline typename basic_string<_CharT, _Traits, _Allocator>::iterator basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, size_type __n, value_type __c) { -#if _LIBCPP_DEBUG_LEVEL == 2 - _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, - "string::insert(iterator, n, value) called with an iterator not" - " referring to this string"); -#endif - difference_type __p = __pos - begin(); - insert(static_cast<size_type>(__p), __n, __c); - return begin() + __p; + _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, + "string::insert(iterator, n, value) called with an iterator not" + " referring to this string"); + difference_type __p = __pos - begin(); + insert(static_cast<size_type>(__p), __n, __c); + return begin() + __p; } // replace @@ -2996,7 +3020,7 @@ basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __ { traits_type::move(__p + __pos, __s, __n2); traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); - goto __finish; + return __null_terminate_at(__p, __sz + (__n2 - __n1)); } if (__p + __pos < __s && __s < __p + __sz) { @@ -3015,13 +3039,7 @@ basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __ } } traits_type::move(__p + __pos, __s, __n2); -__finish: -// __sz += __n2 - __n1; in this and the below function below can cause unsigned -// integer overflow, but this is a safe operation, so we disable the check. - __sz += __n2 - __n1; - __set_size(__sz); - __invalidate_iterators_past(__sz); - traits_type::assign(__p[__sz], value_type()); + return __null_terminate_at(__p, __sz + (__n2 - __n1)); } else __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); @@ -3031,7 +3049,6 @@ __finish: template <class _CharT, class _Traits, class _Allocator> basic_string<_CharT, _Traits, _Allocator>& basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) - _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK { size_type __sz = size(); if (__pos > __sz) @@ -3055,11 +3072,7 @@ basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __ __p = _VSTD::__to_address(__get_long_pointer()); } traits_type::assign(__p + __pos, __n2, __c); - __sz += __n2 - __n1; - __set_size(__sz); - __invalidate_iterators_past(__sz); - traits_type::assign(__p[__sz], value_type()); - return *this; + return __null_terminate_at(__p, __sz - (__n1 - __n2)); } template <class _CharT, class _Traits, class _Allocator> @@ -3170,10 +3183,7 @@ basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( size_type __n_move = __sz - __pos - __n; if (__n_move != 0) traits_type::move(__p + __pos, __p + __pos + __n, __n_move); - __sz -= __n; - __set_size(__sz); - __invalidate_iterators_past(__sz); - traits_type::assign(__p[__sz], value_type()); + __null_terminate_at(__p, __sz - __n); } } @@ -3195,17 +3205,15 @@ inline typename basic_string<_CharT, _Traits, _Allocator>::iterator basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) { -#if _LIBCPP_DEBUG_LEVEL == 2 - _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, - "string::erase(iterator) called with an iterator not" - " referring to this string"); -#endif - _LIBCPP_ASSERT(__pos != end(), - "string::erase(iterator) called with a non-dereferenceable iterator"); - iterator __b = begin(); - size_type __r = static_cast<size_type>(__pos - __b); - erase(__r, 1); - return __b + static_cast<difference_type>(__r); + _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, + "string::erase(iterator) called with an iterator not" + " referring to this string"); + + _LIBCPP_ASSERT(__pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); + iterator __b = begin(); + size_type __r = static_cast<size_type>(__pos - __b); + erase(__r, 1); + return __b + static_cast<difference_type>(__r); } template <class _CharT, class _Traits, class _Allocator> @@ -3213,16 +3221,15 @@ inline typename basic_string<_CharT, _Traits, _Allocator>::iterator basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) { -#if _LIBCPP_DEBUG_LEVEL == 2 - _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this, - "string::erase(iterator, iterator) called with an iterator not" - " referring to this string"); -#endif - _LIBCPP_ASSERT(__first <= __last, "string::erase(first, last) called with invalid range"); - iterator __b = begin(); - size_type __r = static_cast<size_type>(__first - __b); - erase(__r, static_cast<size_type>(__last - __first)); - return __b + static_cast<difference_type>(__r); + _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this, + "string::erase(iterator, iterator) called with an iterator not" + " referring to this string"); + + _LIBCPP_ASSERT(__first <= __last, "string::erase(first, last) called with invalid range"); + iterator __b = begin(); + size_type __r = static_cast<size_type>(__first - __b); + erase(__r, static_cast<size_type>(__last - __first)); + return __b + static_cast<difference_type>(__r); } template <class _CharT, class _Traits, class _Allocator> @@ -3231,20 +3238,7 @@ void basic_string<_CharT, _Traits, _Allocator>::pop_back() { _LIBCPP_ASSERT(!empty(), "string::pop_back(): string is already empty"); - size_type __sz; - if (__is_long()) - { - __sz = __get_long_size() - 1; - __set_long_size(__sz); - traits_type::assign(*(__get_long_pointer() + __sz), value_type()); - } - else - { - __sz = __get_short_size() - 1; - __set_short_size(__sz); - traits_type::assign(*(__get_short_pointer() + __sz), value_type()); - } - __invalidate_iterators_past(__sz); + __erase_to_end(size() - 1); } template <class _CharT, class _Traits, class _Allocator> @@ -3270,17 +3264,7 @@ inline void basic_string<_CharT, _Traits, _Allocator>::__erase_to_end(size_type __pos) { - if (__is_long()) - { - traits_type::assign(*(__get_long_pointer() + __pos), value_type()); - __set_long_size(__pos); - } - else - { - traits_type::assign(*(__get_short_pointer() + __pos), value_type()); - __set_short_size(__pos); - } - __invalidate_iterators_past(__pos); + __null_terminate_at(_VSTD::__to_address(__get_pointer()), __pos); } template <class _CharT, class _Traits, class _Allocator> @@ -3338,6 +3322,7 @@ basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacit } template <class _CharT, class _Traits, class _Allocator> +inline void basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT { @@ -3348,6 +3333,7 @@ basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT } template <class _CharT, class _Traits, class _Allocator> +inline void basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) { @@ -3508,11 +3494,13 @@ basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) #endif { #if _LIBCPP_DEBUG_LEVEL == 2 - if (!__is_long()) - __get_db()->__invalidate_all(this); - if (!__str.__is_long()) - __get_db()->__invalidate_all(&__str); - __get_db()->swap(this, &__str); + if (!__libcpp_is_constant_evaluated()) { + if (!__is_long()) + __get_db()->__invalidate_all(this); + if (!__str.__is_long()) + __get_db()->__invalidate_all(&__str); + __get_db()->swap(this, &__str); + } #endif _LIBCPP_ASSERT( __alloc_traits::propagate_on_container_swap::value || @@ -4571,8 +4559,8 @@ inline namespace literals { return basic_string<char32_t> (__str, __len); } - } -} + } // namespace string_literals +} // namespace literals #endif _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/string_view b/libcxx/include/string_view index a5f85e88b502..3861ad67ca5d 100644 --- a/libcxx/include/string_view +++ b/libcxx/include/string_view @@ -356,7 +356,7 @@ public: size_type length() const _NOEXCEPT { return __size; } _LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY - size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max(); } + size_type max_size() const _NOEXCEPT { return numeric_limits<size_type>::max() / sizeof(value_type); } _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR bool empty() const _NOEXCEPT { return __size == 0; } @@ -947,8 +947,8 @@ inline namespace literals { return basic_string_view<char32_t> (__str, __len); } - } -} + } // namespace string_view_literals +} // namespace literals #endif _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/system_error b/libcxx/include/system_error index 3aa869acff41..059fa0e2d511 100644 --- a/libcxx/include/system_error +++ b/libcxx/include/system_error @@ -206,13 +206,11 @@ public: error_category() _NOEXCEPT; #else _LIBCPP_INLINE_VISIBILITY - _LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT + _LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT = default; #endif -private: - error_category(const error_category&);// = delete; - error_category& operator=(const error_category&);// = delete; + error_category(const error_category&) = delete; + error_category& operator=(const error_category&) = delete; -public: virtual const char* name() const _NOEXCEPT = 0; virtual error_condition default_error_condition(int __ev) const _NOEXCEPT; virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT; diff --git a/libcxx/include/thread b/libcxx/include/thread index a51a11c0d3c8..a4632f6fe524 100644 --- a/libcxx/include/thread +++ b/libcxx/include/thread @@ -88,7 +88,6 @@ void sleep_for(const chrono::duration<Rep, Period>& rel_time); #include <__mutex_base> #include <__thread/poll_with_backoff.h> #include <__threading_support> -#include <__utility/decay_copy.h> #include <__utility/forward.h> #include <chrono> #include <cstddef> @@ -303,8 +302,8 @@ thread::thread(_Fp&& __f, _Args&&... __args) typedef tuple<_TSPtr, typename decay<_Fp>::type, typename decay<_Args>::type...> _Gp; unique_ptr<_Gp> __p( new _Gp(_VSTD::move(__tsp), - _VSTD::__decay_copy(_VSTD::forward<_Fp>(__f)), - _VSTD::__decay_copy(_VSTD::forward<_Args>(__args))...)); + _VSTD::forward<_Fp>(__f), + _VSTD::forward<_Args>(__args)...)); int __ec = _VSTD::__libcpp_thread_create(&__t_, &__thread_proxy<_Gp>, __p.get()); if (__ec == 0) __p.release(); @@ -403,7 +402,7 @@ sleep_until(const chrono::time_point<chrono::steady_clock, _Duration>& __t) inline _LIBCPP_INLINE_VISIBILITY void yield() _NOEXCEPT {__libcpp_thread_yield();} -} // this_thread +} // namespace this_thread _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/include/tuple b/libcxx/include/tuple index 2e3d19627fab..8ee5c2eef51d 100644 --- a/libcxx/include/tuple +++ b/libcxx/include/tuple @@ -1200,7 +1200,7 @@ struct __find_exactly_one_checked<_T1> { static_assert(!is_same<_T1, _T1>::value, "type not in empty type list"); }; -} // namespace __find_detail; +} // namespace __find_detail template <typename _T1, typename... _Args> struct __find_exactly_one_t @@ -1257,7 +1257,7 @@ struct __ignore_t namespace { constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); -} +} // namespace template <class... _Tp> inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits index bfb6fcb05134..155b775e4929 100644 --- a/libcxx/include/type_traits +++ b/libcxx/include/type_traits @@ -550,8 +550,6 @@ template <bool _Bp, class _If, class _Then> using conditional_t = typename condi // is_same -#if __has_keyword(__is_same) - template <class _Tp, class _Up> struct _LIBCPP_TEMPLATE_VIS is_same : _BoolConstant<__is_same(_Tp, _Up)> { }; @@ -560,36 +558,18 @@ template <class _Tp, class _Up> inline constexpr bool is_same_v = __is_same(_Tp, _Up); #endif -#else - -template <class _Tp, class _Up> struct _LIBCPP_TEMPLATE_VIS is_same : public false_type {}; -template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_same<_Tp, _Tp> : public true_type {}; +// _IsSame<T,U> has the same effect as is_same<T,U> but instantiates fewer types: +// is_same<A,B> and is_same<C,D> are guaranteed to be different types, but +// _IsSame<A,B> and _IsSame<C,D> are the same type (namely, false_type). +// Neither GCC nor Clang can mangle the __is_same builtin, so _IsSame +// mustn't be directly used anywhere that contributes to name-mangling +// (such as in a dependent return type). -#if _LIBCPP_STD_VER > 14 template <class _Tp, class _Up> -inline constexpr bool is_same_v = is_same<_Tp, _Up>::value; -#endif - -#endif // __is_same +using _IsSame = _BoolConstant<__is_same(_Tp, _Up)>; template <class _Tp, class _Up> -using _IsSame = _BoolConstant< -#ifdef __clang__ - __is_same(_Tp, _Up) -#else - is_same<_Tp, _Up>::value -#endif ->; - -template <class _Tp, class _Up> -using _IsNotSame = _BoolConstant< -#ifdef __clang__ - !__is_same(_Tp, _Up) -#else - !is_same<_Tp, _Up>::value -#endif ->; - +using _IsNotSame = _BoolConstant<!__is_same(_Tp, _Up)>; template <class _Tp> using __test_for_primary_template = __enable_if_t< @@ -600,9 +580,9 @@ using __is_primary_template = _IsValidExpansion< __test_for_primary_template, _Tp >; -struct __two {char __lx[2];}; +// helper class -// helper class: +struct __two {char __lx[2];}; // is_const @@ -3953,7 +3933,7 @@ struct __nothrow_swappable_with { template <class _Tp, class _Up> struct __nothrow_swappable_with<_Tp, _Up, false> : false_type {}; -} // __detail +} // namespace __detail template <class _Tp> struct __is_swappable diff --git a/libcxx/include/typeinfo b/libcxx/include/typeinfo index d0f9db36a627..af8217548770 100644 --- a/libcxx/include/typeinfo +++ b/libcxx/include/typeinfo @@ -361,7 +361,7 @@ class _LIBCPP_EXCEPTION_ABI bad_typeid virtual const char* what() const _NOEXCEPT; }; -} // std +} // namespace std #endif // defined(_LIBCPP_ABI_VCRUNTIME) diff --git a/libcxx/include/utility b/libcxx/include/utility index 4fa90289a412..9dd7905516a8 100644 --- a/libcxx/include/utility +++ b/libcxx/include/utility @@ -218,6 +218,7 @@ template <class T> #include <__debug> #include <__tuple> #include <__utility/as_const.h> +#include <__utility/auto_cast.h> #include <__utility/cmp.h> #include <__utility/declval.h> #include <__utility/exchange.h> @@ -231,8 +232,13 @@ template <class T> #include <__utility/rel_ops.h> #include <__utility/swap.h> #include <__utility/to_underlying.h> +#include <__utility/transaction.h> #include <compare> #include <initializer_list> #include <version> +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + #endif // _LIBCPP_UTILITY diff --git a/libcxx/include/version b/libcxx/include/version index 9322c3b8c05d..574dfe47b58f 100644 --- a/libcxx/include/version +++ b/libcxx/include/version @@ -109,6 +109,7 @@ __cpp_lib_map_try_emplace 201411L <map> __cpp_lib_math_constants 201907L <numbers> __cpp_lib_math_special_functions 201603L <cmath> __cpp_lib_memory_resource 201603L <memory_resource> +__cpp_lib_monadic_optional 202110L <optional> __cpp_lib_node_extract 201606L <map> <set> <unordered_map> <unordered_set> __cpp_lib_nonmember_container_access 201411L <array> <deque> <forward_list> @@ -347,6 +348,7 @@ __cpp_lib_void_t 201411L <type_traits> #if _LIBCPP_STD_VER > 20 # define __cpp_lib_byteswap 202110L # define __cpp_lib_is_scoped_enum 202011L +# define __cpp_lib_monadic_optional 202110L // # define __cpp_lib_stacktrace 202011L // # define __cpp_lib_stdatomic_h 202011L # define __cpp_lib_string_contains 202011L diff --git a/libcxx/src/barrier.cpp b/libcxx/src/barrier.cpp index 0f9dad987fad..54890b2d797e 100644 --- a/libcxx/src/barrier.cpp +++ b/libcxx/src/barrier.cpp @@ -15,14 +15,14 @@ _LIBCPP_BEGIN_NAMESPACE_STD -#if !defined(_LIBCPP_HAS_NO_TREE_BARRIER) && (_LIBCPP_STD_VER > 11) +#if !defined(_LIBCPP_HAS_NO_TREE_BARRIER) class __barrier_algorithm_base { public: struct alignas(64) /* naturally-align the heap state */ __state_t { struct { - __atomic_base<__barrier_phase_t> __phase = ATOMIC_VAR_INIT(0); + __atomic_base<__barrier_phase_t> __phase{0}; } __tickets[64]; }; @@ -90,7 +90,7 @@ void __destroy_barrier_algorithm_base(__barrier_algorithm_base* __barrier) delete __barrier; } -#endif //!defined(_LIBCPP_HAS_NO_TREE_BARRIER) && (_LIBCPP_STD_VER >= 11) +#endif //!defined(_LIBCPP_HAS_NO_TREE_BARRIER) _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/src/charconv.cpp b/libcxx/src/charconv.cpp index 533e59b04d6f..60ec3eccc949 100644 --- a/libcxx/src/charconv.cpp +++ b/libcxx/src/charconv.cpp @@ -9,27 +9,14 @@ #include "charconv" #include <string.h> +#include "include/ryu/digit_table.h" +#include "include/to_chars_floating_point.h" + _LIBCPP_BEGIN_NAMESPACE_STD namespace __itoa { -static constexpr char cDigitsLut[200] = { - '0', '0', '0', '1', '0', '2', '0', '3', '0', '4', '0', '5', '0', '6', '0', - '7', '0', '8', '0', '9', '1', '0', '1', '1', '1', '2', '1', '3', '1', '4', - '1', '5', '1', '6', '1', '7', '1', '8', '1', '9', '2', '0', '2', '1', '2', - '2', '2', '3', '2', '4', '2', '5', '2', '6', '2', '7', '2', '8', '2', '9', - '3', '0', '3', '1', '3', '2', '3', '3', '3', '4', '3', '5', '3', '6', '3', - '7', '3', '8', '3', '9', '4', '0', '4', '1', '4', '2', '4', '3', '4', '4', - '4', '5', '4', '6', '4', '7', '4', '8', '4', '9', '5', '0', '5', '1', '5', - '2', '5', '3', '5', '4', '5', '5', '5', '6', '5', '7', '5', '8', '5', '9', - '6', '0', '6', '1', '6', '2', '6', '3', '6', '4', '6', '5', '6', '6', '6', - '7', '6', '8', '6', '9', '7', '0', '7', '1', '7', '2', '7', '3', '7', '4', - '7', '5', '7', '6', '7', '7', '7', '8', '7', '9', '8', '0', '8', '1', '8', - '2', '8', '3', '8', '4', '8', '5', '8', '6', '8', '7', '8', '8', '8', '9', - '9', '0', '9', '1', '9', '2', '9', '3', '9', '4', '9', '5', '9', '6', '9', - '7', '9', '8', '9', '9'}; - template <typename T> inline _LIBCPP_INLINE_VISIBILITY char* append1(char* buffer, T i) noexcept @@ -42,7 +29,7 @@ template <typename T> inline _LIBCPP_INLINE_VISIBILITY char* append2(char* buffer, T i) noexcept { - memcpy(buffer, &cDigitsLut[(i)*2], 2); + memcpy(buffer, &__DIGIT_TABLE[(i)*2], 2); return buffer + 2; } @@ -157,4 +144,53 @@ __u64toa(uint64_t value, char* buffer) noexcept } // namespace __itoa +// The original version of floating-point to_chars was written by Microsoft and +// contributed with the following license. + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// This implementation is dedicated to the memory of Mary and Thavatchai. + +to_chars_result to_chars(char* __first, char* __last, float __value) { + return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0); +} + +to_chars_result to_chars(char* __first, char* __last, double __value) { + return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0); +} + +to_chars_result to_chars(char* __first, char* __last, long double __value) { + return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, static_cast<double>(__value), + chars_format{}, 0); +} + +to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt) { + return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0); +} + +to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt) { + return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0); +} + +to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt) { + return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, static_cast<double>(__value), + __fmt, 0); +} + +to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision) { + return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(__first, __last, __value, __fmt, + __precision); +} + +to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision) { + return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(__first, __last, __value, __fmt, + __precision); +} + +to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision) { + return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>( + __first, __last, static_cast<double>(__value), __fmt, __precision); +} + _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/src/chrono.cpp b/libcxx/src/chrono.cpp index 8ff3faf9df6a..5aa7af75894b 100644 --- a/libcxx/src/chrono.cpp +++ b/libcxx/src/chrono.cpp @@ -80,9 +80,9 @@ public: GetSystemTimeAsFileTimePtr fp; }; -# 83 "chrono.cpp" 1 3 -GetSystemTimeInit GetSystemTimeAsFileTimeFunc _LIBCPP_INIT_PRIORITY_MAX; -# 85 "chrono.cpp" 2 +// Pretend we're inside a system header so the compiler doesn't flag the use of the init_priority +// attribute with a value that's reserved for the implementation (we're the implementation). +#include "chrono_system_time_init.h" } // namespace #endif diff --git a/libcxx/src/chrono_system_time_init.h b/libcxx/src/chrono_system_time_init.h new file mode 100644 index 000000000000..3c5a0c33a56a --- /dev/null +++ b/libcxx/src/chrono_system_time_init.h @@ -0,0 +1,2 @@ +#pragma GCC system_header +GetSystemTimeInit GetSystemTimeAsFileTimeFunc _LIBCPP_INIT_PRIORITY_MAX;
\ No newline at end of file diff --git a/libcxx/src/experimental/memory_resource.cpp b/libcxx/src/experimental/memory_resource.cpp index be2fb47fad16..018d0159281a 100644 --- a/libcxx/src/experimental/memory_resource.cpp +++ b/libcxx/src/experimental/memory_resource.cpp @@ -76,9 +76,9 @@ union ResourceInitHelper { ~ResourceInitHelper() {} }; -# 79 "memory_resource.cpp" 1 3 -_LIBCPP_SAFE_STATIC ResourceInitHelper res_init _LIBCPP_INIT_PRIORITY_MAX; -# 81 "memory_resource.cpp" 2 +// Pretend we're inside a system header so the compiler doesn't flag the use of the init_priority +// attribute with a value that's reserved for the implementation (we're the implementation). +#include "memory_resource_init_helper.h" } // end namespace @@ -97,8 +97,7 @@ static memory_resource * __default_memory_resource(bool set = false, memory_resource * new_res = nullptr) noexcept { #ifndef _LIBCPP_HAS_NO_ATOMIC_HEADER - _LIBCPP_SAFE_STATIC static atomic<memory_resource*> __res = - ATOMIC_VAR_INIT(&res_init.resources.new_delete_res); + _LIBCPP_SAFE_STATIC static atomic<memory_resource*> __res{&res_init.resources.new_delete_res}; if (set) { new_res = new_res ? new_res : new_delete_resource(); // TODO: Can a weaker ordering be used? diff --git a/libcxx/src/experimental/memory_resource_init_helper.h b/libcxx/src/experimental/memory_resource_init_helper.h new file mode 100644 index 000000000000..2e1cae5ecc60 --- /dev/null +++ b/libcxx/src/experimental/memory_resource_init_helper.h @@ -0,0 +1,2 @@ +#pragma GCC system_header +_LIBCPP_SAFE_STATIC ResourceInitHelper res_init _LIBCPP_INIT_PRIORITY_MAX;
\ No newline at end of file diff --git a/libcxx/src/filesystem/directory_iterator.cpp b/libcxx/src/filesystem/directory_iterator.cpp index 6219ceafd36e..90b255d9877f 100644 --- a/libcxx/src/filesystem/directory_iterator.cpp +++ b/libcxx/src/filesystem/directory_iterator.cpp @@ -6,8 +6,9 @@ // //===----------------------------------------------------------------------===// -#include "filesystem" #include "__config" +#include "filesystem" +#include "stack" #if defined(_LIBCPP_WIN32API) #define WIN32_LEAN_AND_MEAN #define NOMINMAX diff --git a/libcxx/src/filesystem/filesystem_common.h b/libcxx/src/filesystem/filesystem_common.h index a2c340e61083..717894e537d2 100644 --- a/libcxx/src/filesystem/filesystem_common.h +++ b/libcxx/src/filesystem/filesystem_common.h @@ -17,6 +17,7 @@ #include "cstdlib" #include "ctime" #include "filesystem" +#include "system_error" #if !defined(_LIBCPP_WIN32API) # include <unistd.h> diff --git a/libcxx/src/format.cpp b/libcxx/src/format.cpp index 7ae2af59b7fa..2ebec28247e6 100644 --- a/libcxx/src/format.cpp +++ b/libcxx/src/format.cpp @@ -10,10 +10,6 @@ _LIBCPP_BEGIN_NAMESPACE_STD -#if _LIBCPP_STD_VER > 17 - format_error::~format_error() noexcept = default; -#endif //_LIBCPP_STD_VER > 17 - _LIBCPP_END_NAMESPACE_STD diff --git a/libcxx/src/include/ryu/common.h b/libcxx/src/include/ryu/common.h new file mode 100644 index 000000000000..52913120f107 --- /dev/null +++ b/libcxx/src/include/ryu/common.h @@ -0,0 +1,107 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_COMMON_H +#define _LIBCPP_SRC_INCLUDE_RYU_COMMON_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __decimalLength9(const uint32_t __v) { + // Function precondition: __v is not a 10-digit number. + // (f2s: 9 digits are sufficient for round-tripping.) + // (d2fixed: We print 9-digit blocks.) + _LIBCPP_ASSERT(__v < 1000000000, ""); + if (__v >= 100000000) { return 9; } + if (__v >= 10000000) { return 8; } + if (__v >= 1000000) { return 7; } + if (__v >= 100000) { return 6; } + if (__v >= 10000) { return 5; } + if (__v >= 1000) { return 4; } + if (__v >= 100) { return 3; } + if (__v >= 10) { return 2; } + return 1; +} + +// Returns __e == 0 ? 1 : ceil(log_2(5^__e)). +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline int32_t __pow5bits(const int32_t __e) { + // This approximation works up to the point that the multiplication overflows at __e = 3529. + // If the multiplication were done in 64 bits, it would fail at 5^4004 which is just greater + // than 2^9297. + _LIBCPP_ASSERT(__e >= 0, ""); + _LIBCPP_ASSERT(__e <= 3528, ""); + return static_cast<int32_t>(((static_cast<uint32_t>(__e) * 1217359) >> 19) + 1); +} + +// Returns floor(log_10(2^__e)). +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __log10Pow2(const int32_t __e) { + // The first value this approximation fails for is 2^1651 which is just greater than 10^297. + _LIBCPP_ASSERT(__e >= 0, ""); + _LIBCPP_ASSERT(__e <= 1650, ""); + return (static_cast<uint32_t>(__e) * 78913) >> 18; +} + +// Returns floor(log_10(5^__e)). +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __log10Pow5(const int32_t __e) { + // The first value this approximation fails for is 5^2621 which is just greater than 10^1832. + _LIBCPP_ASSERT(__e >= 0, ""); + _LIBCPP_ASSERT(__e <= 2620, ""); + return (static_cast<uint32_t>(__e) * 732923) >> 20; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __float_to_bits(const float __f) { + uint32_t __bits = 0; + _VSTD::memcpy(&__bits, &__f, sizeof(float)); + return __bits; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __double_to_bits(const double __d) { + uint64_t __bits = 0; + _VSTD::memcpy(&__bits, &__d, sizeof(double)); + return __bits; +} + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_COMMON_H diff --git a/libcxx/src/include/ryu/d2fixed.h b/libcxx/src/include/ryu/d2fixed.h new file mode 100644 index 000000000000..e495c11b1d4f --- /dev/null +++ b/libcxx/src/include/ryu/d2fixed.h @@ -0,0 +1,60 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_H +#define _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" +#include "cstdint" + +_LIBCPP_BEGIN_NAMESPACE_STD + +void __append_n_digits(const uint32_t __olength, uint32_t __digits, char* const __result); +void __append_nine_digits(uint32_t __digits, char* const __result); + +[[nodiscard]] to_chars_result __d2fixed_buffered_n(char* _First, char* const _Last, const double __d, const uint32_t __precision); +[[nodiscard]] to_chars_result __d2exp_buffered_n(char* _First, char* const _Last, const double __d, uint32_t __precision); + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_H diff --git a/libcxx/src/include/ryu/d2fixed_full_table.h b/libcxx/src/include/ryu/d2fixed_full_table.h new file mode 100644 index 000000000000..7181cd8cf6e2 --- /dev/null +++ b/libcxx/src/include/ryu/d2fixed_full_table.h @@ -0,0 +1,4451 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_FULL_TABLE_H +#define _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_FULL_TABLE_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +inline constexpr int __TABLE_SIZE = 64; + +inline constexpr uint16_t __POW10_OFFSET[__TABLE_SIZE] = { + 0, 2, 5, 8, 12, 16, 21, 26, 32, 39, + 46, 54, 62, 71, 80, 90, 100, 111, 122, 134, + 146, 159, 173, 187, 202, 217, 233, 249, 266, 283, + 301, 319, 338, 357, 377, 397, 418, 440, 462, 485, + 508, 532, 556, 581, 606, 632, 658, 685, 712, 740, + 769, 798, 828, 858, 889, 920, 952, 984, 1017, 1050, + 1084, 1118, 1153, 1188 +}; + +inline constexpr uint64_t __POW10_SPLIT[1224][3] = { + { 1u, 72057594037927936u, 0u }, + { 699646928636035157u, 72057594u, 0u }, + { 1u, 0u, 256u }, + { 11902091922964236229u, 4722366482869u, 0u }, + { 6760415703743915872u, 4722u, 0u }, + { 1u, 0u, 16777216u }, + { 13369850649504950658u, 309485009821345068u, 0u }, + { 15151142278969419334u, 309485009u, 0u }, + { 1u, 0u, 75511627776u }, + { 4635408826454083567u, 9437866644873197963u, 1099u }, + { 12367138975830625353u, 20282409603651u, 0u }, + { 7555853734021184432u, 20282u, 0u }, + { 1u, 0u, 250037927936u }, + { 5171444645924616995u, 699646928636035156u, 72057594u }, + { 16672297533003297786u, 1329227995784915872u, 0u }, + { 14479142226848862515u, 1329227995u, 0u }, + { 1u, 0u, 181645213696u }, + { 12214193123817091081u, 11902091922964236228u, 114366482869u }, + { 16592893013671929435u, 6760415703743915871u, 4722u }, + { 4549827147718617003u, 87112285931760u, 0u }, + { 5274510003815168971u, 87112u, 0u }, + { 1u, 0u, 44724781056u }, + { 9794971998307800535u, 13369850649504950657u, 209821345068u }, + { 14720142899209240169u, 15151142278969419333u, 309485009u }, + { 4300745446091561535u, 5708990770823839524u, 0u }, + { 15197156861335443364u, 5708990770u, 0u }, + { 1u, 0u, 139251286016u }, + { 13484604155038683037u, 4635408826454083566u, 67670423947u }, + { 8356963862052375699u, 12367138975830625352u, 58409603651u }, + { 5850852848337610021u, 7555853734021184431u, 20282u }, + { 2712780827214982050u, 374144419156711u, 0u }, + { 7732076577307618052u, 374144u, 0u }, + { 1u, 0u, 84280344576u }, + { 17296309485351745867u, 5171444645924616994u, 160903807060u }, + { 16598859101615853088u, 16672297533003297785u, 219784915872u }, + { 7469952526870444257u, 14479142226848862514u, 1329227995u }, + { 13531654022114669524u, 6073184580144670117u, 1u }, + { 15757609704383306943u, 24519928653u, 0u }, + { 9590990814237149590u, 24u, 0u }, + { 1u, 0u, 196662132736u }, + { 15408590707489433890u, 12214193123817091080u, 95899502532u }, + { 18332056844289122710u, 16592893013671929434u, 240246646623u }, + { 11114572877353986193u, 4549827147718617002u, 72285931760u }, + { 1703393793997526525u, 5274510003815168970u, 87112u }, + { 5082852056285196265u, 1606938044258990u, 0u }, + { 816434266573722365u, 1606938u, 0u }, + { 1u, 0u, 129530986496u }, + { 5736523019264798742u, 9794971998307800534u, 69797980545u }, + { 10129314776268243339u, 14720142899209240168u, 36233143877u }, + { 16511595775483995364u, 4300745446091561534u, 50823839524u }, + { 12367293405401453325u, 15197156861335443363u, 5708990770u }, + { 16934621733248854291u, 13078571300009428617u, 5u }, + { 10278280417769171336u, 105312291668u, 0u }, + { 5760764486226151240u, 105u, 0u }, + { 1u, 0u, 238731001856u }, + { 4128368337188369761u, 13484604155038683036u, 72453031918u }, + { 10240941003671005056u, 8356963862052375698u, 175317175368u }, + { 17933378316822368251u, 5850852848337610020u, 231147060143u }, + { 8346249813075698616u, 2712780827214982049u, 128419156711u }, + { 15906203609160902695u, 7732076577307618051u, 374144u }, + { 14525607416135386328u, 6901746346790563u, 0u }, + { 6397156777364256320u, 6901746u, 0u }, + { 1u, 0u, 34937634816u }, + { 16798760952716600048u, 17296309485351745866u, 249899825954u }, + { 2419982808370854967u, 16598859101615853087u, 50404946937u }, + { 2922947087773078956u, 7469952526870444256u, 165733552434u }, + { 15419220167069510190u, 13531654022114669523u, 77854221733u }, + { 3452124642157173416u, 15757609704383306942u, 24519928653u }, + { 5979700067267186899u, 9590990814237149589u, 24u }, + { 4913998146922579597u, 452312848583u, 0u }, + { 5771037749337678924u, 452u, 0u }, + { 1u, 0u, 8835301376u }, + { 3464734175350698519u, 15408590707489433889u, 90993782792u }, + { 9334527711335850125u, 18332056844289122709u, 170602522202u }, + { 7269882896518450106u, 11114572877353986192u, 202092341162u }, + { 1372511258182263196u, 1703393793997526524u, 174275541962u }, + { 7571228438575951046u, 5082852056285196264u, 26044258990u }, + 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18190538519673445180u, 153068901087u }, + { 5505463469596727288u, 1271000736479934748u, 96991663513u }, + { 12125446212518819372u, 18292963032817745633u, 151930679904u }, + { 12537707724735421794u, 17168014021925537454u, 165978316695u }, + { 15173675086703777069u, 18046757712870378948u, 167805453733u }, + { 13535510174093048476u, 14857998893911743219u, 7646922151u }, + { 10698912997087096629u, 11933607369968684574u, 179188857095u }, + { 16952559548431933861u, 3483798509902859161u, 107400007091u }, + { 13528255827744249993u, 7378828438829845830u, 75856039275u }, + { 14122167436324771955u, 15791137430347699564u, 11923964747u }, + { 13071007137740038297u, 17044141236829932640u, 221491992075u }, + { 13011887609328904025u, 9075651910862456483u, 46965547485u }, + { 3116434332871336590u, 17811207355884564094u, 59240619054u }, + { 9050993820536772770u, 4438638126207305936u, 57678058555u }, + { 11993719123438634238u, 12507972635512950184u, 225794626361u }, + { 1414857165879849301u, 14658269128098109407u, 119197456865u }, + { 13819438220812375094u, 3642436268910286110u, 196205082231u }, + { 6073063033888264440u, 3783099432964819560u, 54514864836u }, + { 6828883869150720294u, 9497579866027539637u, 222184053046u }, + { 4548265621068768345u, 3395179445046271360u, 152321926878u }, + { 10422524923581371874u, 5938502732309497275u, 224314075544u }, + { 1858996082510682634u, 5793671185917606254u, 224048207584u }, + { 890276727450878316u, 889272970253526587u, 90465891296u }, + { 3886008133802710905u, 8594177504370135500u, 102399764570u }, + { 612074409233016757u, 7374354721120724711u, 190800386918u }, + { 3927020336901729264u, 14764532643665507566u, 2494u }, + { 5298603480094474942u, 46020944252475u, 0u }, + { 17418383752590430025u, 46020u, 0u }, + { 1u, 0u, 45292322816u }, + { 8973799690601597929u, 5392404173658087694u, 121269781293u }, + { 1343055462055792431u, 4976586473237854315u, 83342007929u }, + { 17425118728683169659u, 6308932742419013568u, 51261934931u }, + { 18389781726026675967u, 4831846642430703058u, 102983344691u }, + { 272526939565961561u, 18139507855949846900u, 231263777382u }, + { 11293026845930963228u, 4865833876326628409u, 113775023591u }, + { 13997416438903902597u, 14296661839130179260u, 163501702257u }, + { 6186605805999441184u, 9254773150378118247u, 221659992483u }, + { 4401776373281836138u, 12174712433727875142u, 65038253533u }, + { 16338917089754547008u, 705653145340915198u, 114962984513u }, + { 13337700757935003056u, 17763928858962481811u, 50215910002u }, + { 14612496890816348693u, 3982836567612046295u, 156690140722u }, + { 3219935399907691719u, 12730849277561967738u, 88938620316u }, + { 10887238730052330387u, 17314488764367235907u, 102864728152u }, + { 360256418697768294u, 15951418930590301118u, 37389952614u }, + { 321440824631118565u, 7193356087283467260u, 136953715493u }, + { 10069228080701402580u, 17592945625696089445u, 243192687752u }, + { 9428069607611622975u, 3554461664875361427u, 46120009203u }, + { 14736799017468812344u, 2213779057785318207u, 153210386222u }, + { 10875332567307979280u, 3880940796082421147u, 149245476249u }, + { 4611492910339012807u, 4528237545358141042u, 108633238933u }, + { 10743508637597314786u, 11681196539088147362u, 140533156716u }, + { 9356196315668016028u, 9835005502912643016u, 128269103756u }, + { 15755598617722189347u, 4964088126040986695u, 206181905536u }, + { 1275276394173375542u, 3355564873147047621u, 30100456398u }, + { 12644999363867216251u, 1853093467828272926u, 105799888670u }, + { 4553830511509832021u, 14755341584803008676u, 103254872681u }, + { 8869400642218174412u, 4701571132542556620u, 87332245607u }, + { 16570849151159054040u, 6128849686644853850u, 68651977815u }, + { 16127119334101797673u, 12026867901170202093u, 86970890052u }, + { 9686867250420930550u, 17909760324981426302u, 230157084246u }, + { 10678226869774428035u, 2897692901883393663u, 163499238u }, + { 7767227962910162068u, 3016028602530220424u, 0u }, + { 9780840471948993674u, 3016028602u, 0u }, + { 1u, 0u, 213668069376u }, + { 6288709332106746357u, 12323704802554838153u, 16386837205u }, + { 9066785620141948673u, 7135886931147821731u, 141831652624u }, + { 8442375916704414909u, 15341283120292884946u, 14167660429u }, + { 11604629218100425803u, 3092789040392634165u, 188477686542u }, + { 3877248044010875762u, 8811761390822097864u, 134914571196u }, + { 16435137704395217283u, 16870860798610218168u, 103946077062u }, + { 14994442577577813271u, 17452041453591904832u, 111559165543u }, + { 4410105917142436089u, 10314783684009874907u, 245267398767u }, + { 4632574728444936970u, 4932636630789274902u, 202983581941u }, + { 9117147535650050359u, 18143884346082124479u, 134153046474u }, + { 588939301256904809u, 2823209155405527321u, 69877954182u }, + { 324393982565305683u, 16195396106620226250u, 173062371141u }, + { 9380909186923521175u, 1150544491807648943u, 73421074605u }, + { 4463385697777230217u, 7767455475523884823u, 94824230985u }, + { 16378985502426333808u, 15204378045683991807u, 211934567774u }, + { 18210894922387834354u, 17239732561718805621u, 38698574803u }, + { 1555748035329493205u, 12886430624522800061u, 83984577574u }, + { 4277055533891898507u, 18162250541178258135u, 184923140435u }, + { 11574429772510874408u, 17028935366700158083u, 219871452856u }, + { 17391099253493808815u, 16075467823964198636u, 215531468251u }, + { 5791212393959129882u, 9803858825574498303u, 27946729175u }, + { 11254268231455680880u, 17464070808143041816u, 124958581275u }, + { 16355477587312235322u, 17682703471239266775u, 227983788156u }, + { 2411485149249320633u, 18147688354161351335u, 145361224931u }, + { 12763114642070638360u, 6663423873348080050u, 183510511249u }, + { 1147543073987366419u, 9417270363716235132u, 197503883703u }, + { 8410777835225272692u, 9295013721571344178u, 63336074437u }, + { 8134725822306818018u, 6199479138350037782u, 14048117055u }, + { 8899607004752328377u, 887603005365085687u, 232018105614u }, + { 690976506652396830u, 333989628642975695u, 140250490600u }, + { 12281570945595192074u, 4620735991403939438u, 54673209484u }, + { 12592957291365552899u, 12418523063962801200u, 219086071862u }, + { 13595807339013970272u, 1587745622680169418u, 10715u }, + { 9698096389749839992u, 197658450495420u, 0u }, + { 8310173728816391804u, 197658u, 0u }, +}; + +inline constexpr int __TABLE_SIZE_2 = 69; +inline constexpr int __ADDITIONAL_BITS_2 = 120; + +inline constexpr uint16_t __POW10_OFFSET_2[__TABLE_SIZE_2] = { + 0, 2, 6, 12, 20, 29, 40, 52, 66, 80, + 95, 112, 130, 150, 170, 192, 215, 240, 265, 292, + 320, 350, 381, 413, 446, 480, 516, 552, 590, 629, + 670, 712, 755, 799, 845, 892, 940, 989, 1040, 1092, + 1145, 1199, 1254, 1311, 1369, 1428, 1488, 1550, 1613, 1678, + 1743, 1810, 1878, 1947, 2017, 2088, 2161, 2235, 2311, 2387, + 2465, 2544, 2625, 2706, 2789, 2873, 2959, 3046, 3133 +}; + +inline constexpr uint8_t __MIN_BLOCK_2[__TABLE_SIZE_2] = { + 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, + 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, + 8, 9, 9, 10, 11, 11, 12, 12, 13, 13, + 14, 14, 15, 15, 16, 16, 17, 17, 18, 19, + 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, + 24, 25, 26, 26, 27, 27, 28, 28, 29, 29, + 30, 30, 31, 31, 32, 32, 33, 34, 0 +}; + +inline constexpr uint64_t __POW10_SPLIT_2[3133][3] = { + { 0u, 0u, 3906250u }, + { 0u, 0u, 202000000000u }, + { 0u, 11153727427136454656u, 59u }, + { 0u, 7205759403792793600u, 59604644775u }, + { 0u, 0u, 167390625000u }, + { 0u, 0u, 232000000000u }, + { 0u, 16777216000000000u, 0u }, + { 0u, 12945425605062557696u, 909494u }, + { 0u, 4388757836872548352u, 182701772928u }, + { 0u, 1152921504606846976u, 128237915039u }, + { 0u, 0u, 159062500000u }, + { 0u, 0u, 160000000000u }, + { 0u, 256000000000u, 0u }, + { 0u, 16192327041775828992u, 13u }, + { 0u, 15024075324038053888u, 13877787807u }, + { 0u, 5449091666327633920u, 159814456755u }, + { 0u, 2494994193563254784u, 179295395851u }, + { 0u, 4611686018427387904u, 11135253906u }, + { 0u, 0u, 146250000000u }, + { 0u, 0u, 128000000000u }, + { 0u, 3906250u, 0u }, + { 0u, 3906250000000000u, 0u }, + { 0u, 4368439412768899072u, 211758u }, + { 0u, 1563676642168012800u, 46236813575u }, + { 0u, 11532349341402398720u, 7084767080u }, + { 0u, 9048364970084925440u, 104625169910u }, + { 0u, 16609275425742389248u, 246490512847u }, + { 0u, 0u, 207900390625u }, + { 0u, 0u, 225000000000u }, + { 11153727427136454656u, 59u, 0u }, + { 7205759403792793600u, 59604644775u, 0u }, + { 0u, 4264412554261970152u, 3u }, + { 0u, 14485570586272534528u, 3231174267u }, + { 0u, 17827675094632103936u, 123785264354u }, + { 0u, 7347197909193981952u, 226966440203u }, + { 0u, 13677404030777688064u, 11398292396u }, + { 0u, 3810326759732150272u, 172741453558u }, + { 0u, 9943947977234055168u, 246206558227u }, + { 0u, 0u, 19539062500u }, + { 0u, 0u, 228000000000u }, + { 12945425605062557696u, 909494u, 0u }, + { 4388757836872548352u, 909494701772928u, 0u }, + { 1152921504606846976u, 14878706826214591391u, 49303u }, + { 0u, 4387341015746028192u, 151806576313u }, + { 0u, 651726680428265472u, 185237838233u }, + { 0u, 2570638187944738816u, 153035330174u }, + { 0u, 7419175577111756800u, 126139354575u }, + { 0u, 17299322326264840192u, 207402194313u }, + { 0u, 7990511638862102528u, 137937798142u }, + { 0u, 16717361816799281152u, 254433166503u }, + { 0u, 0u, 167906250000u }, + { 0u, 0u, 16000000000u }, + { 16192327041775828992u, 13u, 0u }, + { 15024075324038053888u, 13877787807u, 0u }, + { 5449091666327633920u, 13877787807814456755u, 0u }, + { 2494994193563254784u, 9707857417284919307u, 752316384u }, + { 4611686018427387904u, 1844515466944871826u, 224526264005u }, + { 0u, 15167599819856275072u, 197099991383u }, + { 0u, 14830185305589481472u, 87822237233u }, + { 0u, 6163721531743535104u, 49803945956u }, + { 0u, 14122847407012052992u, 228334136013u }, + { 0u, 335491783960035328u, 205765601092u }, + { 0u, 941252322120433664u, 68018187046u }, + { 0u, 11529215046068469760u, 38051025390u }, + { 0u, 0u, 238625000000u }, + { 0u, 0u, 64000000000u }, + { 4368439412768899072u, 211758u, 0u }, + { 1563676642168012800u, 211758236813575u, 0u }, + { 11532349341402398720u, 8061591463141767016u, 11479u }, + { 9048364970084925440u, 16628725344207857142u, 215437019748u }, + { 16609275425742389248u, 3555541870038531535u, 100901445007u }, + { 0u, 18316647450161853665u, 143192746310u }, + { 0u, 16709574568378075648u, 70992947447u }, + { 0u, 7696022835795591168u, 247905827852u }, + { 0u, 16664449640376041472u, 12417202233u }, + { 0u, 3109186955116544000u, 57903381625u }, + { 0u, 10515518101817131008u, 121168549362u }, + { 0u, 9961962375743537152u, 242570047378u }, + { 0u, 9223372036854775808u, 146540039062u }, + { 0u, 0u, 150500000000u }, + { 14485570586272534528u, 3231174267u, 0u }, + { 17827675094632103936u, 3231174267785264354u, 0u }, + { 7347197909193981952u, 748977172262750475u, 175162308u }, + { 13677404030777688064u, 15965033457315095468u, 196040602133u }, + { 3810326759732150272u, 16809402149066729206u, 21865466197u }, + { 9943947977234055168u, 7563769067065700371u, 85911239516u }, + { 0u, 13550322810840051428u, 92410032742u }, + { 0u, 8663209637545764864u, 102734564471u }, + { 0u, 8969247575312957440u, 119469633535u }, + { 0u, 6193172891660451840u, 255486223885u }, + { 0u, 3427954273864908800u, 13335732575u }, + { 0u, 10058367555266936832u, 95185829773u }, + { 0u, 13907115649320091648u, 141545265197u }, + { 0u, 0u, 45753906250u }, + { 0u, 0u, 74000000000u }, + { 14878706826214591391u, 49303u, 0u }, + { 4387341015746028192u, 49303806576313u, 0u }, + { 651726680428265472u, 14106411361315920281u, 2672u }, + { 2570638187944738816u, 3609034283485221502u, 112764710092u }, + { 7419175577111756800u, 9896072247338192335u, 204195646140u }, + { 17299322326264840192u, 8889095178479228297u, 188536467151u }, + { 7990511638862102528u, 3631796911038383102u, 207481878815u }, + { 16717361816799281152u, 898318840772166823u, 31196880105u }, + { 0u, 17293677953982795024u, 233048697961u }, + { 0u, 7353628266884669440u, 105937492160u }, + { 0u, 2404693032470315008u, 192398640987u }, + { 0u, 9191155893041889280u, 91130358670u }, + { 0u, 6353946855033798656u, 142498253559u }, + { 0u, 3767824038248841216u, 247344448149u }, + { 0u, 7205759403792793600u, 149204254150u }, + { 0u, 0u, 198390625000u }, + { 0u, 0u, 232000000000u }, + { 9707857417284919307u, 752316384u, 0u }, + { 1844515466944871826u, 752316384526264005u, 0u }, + { 15167599819856275072u, 17063068157692817751u, 40783152u }, + { 14830185305589481472u, 5385330256507239985u, 48924990778u }, + { 6163721531743535104u, 3373050282752075748u, 58291939338u }, + { 14122847407012052992u, 4116064001262906061u, 10182853422u }, + { 335491783960035328u, 11306582046748043076u, 46223132276u }, + { 941252322120433664u, 17035410946089626406u, 116612931040u }, + { 11529215046068469760u, 15618595715183448558u, 224923491477u }, + { 0u, 5141740092277295680u, 149846685770u }, + { 0u, 16973644291514990592u, 74278734288u }, + { 0u, 14625255268443750400u, 208920143100u }, 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4250043307981877118u, 11545396528u }, + { 18088011566435813579u, 7075646198054337199u, 48230395309u }, + { 15008862380698848893u, 18141738384245531503u, 173383571548u }, + { 18160498644611827812u, 8174370508376809531u, 92983465608u }, + { 3604680497457231965u, 3581964982731575596u, 136443133513u }, + { 5957615565551495921u, 14798509948722114761u, 73194178710u }, + { 17528455034961565995u, 14713923334885122090u, 150802228831u }, + { 8503772325120113809u, 5042978054260414139u, 95797643382u }, + { 8501492578048509537u, 2052996319372883413u, 118273380388u }, + { 2296237701094386060u, 8825683007899981588u, 36111293153u }, + { 3753593040591076946u, 9992196755378745151u, 225478441234u }, + { 8518075399775653155u, 9301073417573669950u, 18541678071u }, + { 12757855675959554597u, 5331614769144850592u, 247504212200u }, + { 121631169379748595u, 14354009428310052102u, 232289027415u }, + { 16679062494579173314u, 5581221063029119078u, 87778132410u }, + { 10739912744743898054u, 1529260335339476189u, 186302558600u }, + { 9367340677776287570u, 16483061525949201148u, 136082901368u }, + { 12227321512794715397u, 14431217812333089675u, 120893548555u }, + { 7241061891859170651u, 3452349151135392267u, 11782317885u }, + { 13148571323079237489u, 9075317899834447999u, 61187152222u }, + { 12509763434355012654u, 2764331337978901575u, 94491973969u }, + { 11812768946960181977u, 1942890683708857202u, 81149854702u }, + { 14170358803552564832u, 165089169728028447u, 238105324315u }, + { 18179989524780635952u, 15193620741871233073u, 27008949501u }, + { 17091718978514754901u, 14995000835194145926u, 253823647830u }, + { 7394768384359232459u, 1788823614552255558u, 86812880624u }, + { 6778628272692852803u, 8384901184618498845u, 240096972322u }, + { 18193335045875234320u, 405511217862281310u, 34454546404u }, + { 1378519212560967521u, 3111530463755196557u, 228021982807u }, + { 4677732610631043584u, 7893558450035460812u, 87168676404u }, + { 17296098591070486528u, 156573858237402216u, 52427910661u }, + { 7343735382392963072u, 15915324019419451223u, 5008487885u }, + { 14525996728454217728u, 16293363012778802804u, 205862771443u }, + { 9691359370008330240u, 14342105318291351412u, 243883264978u }, + { 3044433348102455296u, 3788398842525387052u, 210777487087u }, + { 9223372036854775808u, 14118764407048307670u, 239205369512u }, + { 0u, 2705021334614720768u, 168765379752u }, + { 0u, 7017988973805568000u, 168146639500u }, + { 0u, 10956732053634154496u, 140380445944u }, + { 0u, 14657517938546835456u, 248593965634u }, + { 0u, 11268868284797157376u, 66794585639u }, + { 0u, 14600669991935148032u, 39610886573u }, + { 0u, 4611686018427387904u, 173791503906u }, + { 0u, 0u, 34250000000u }, + { 0u, 0u, 128000000000u }, + { 8201586317771250746u, 1424047269u, 0u }, + { 3278889188817135834u, 1424047269444608885u, 0u }, + { 1710725240251040430u, 3001188830946823627u, 77197757u }, + { 1850175733663425006u, 9732296932705387049u, 189162694772u }, + { 9147599666163914249u, 16337535782679529459u, 116527588873u }, + { 10221885933644344166u, 7969742269895046547u, 9885659589u }, + { 14901479793736678101u, 2923592083903829642u, 197432040594u }, + { 5181831442059703136u, 8144196241160608534u, 146158488244u }, + { 6396246577759793483u, 16431078457793424253u, 180441497762u }, + { 14167229556464870447u, 202362949592775653u, 162890730548u }, + { 2969982933326311854u, 8835125248522947981u, 52010970117u }, + { 7892677766222018881u, 7959873808777345113u, 5478953099u }, + { 798698968922663621u, 14929747122315126151u, 139431505623u }, + { 15926812109043458972u, 4310328817360515349u, 215809343213u }, + { 8663842590352697437u, 7294899422760201126u, 237233663393u }, + { 17093523026636671168u, 2047461597291187207u, 161395457290u }, + { 839764004742743203u, 10942374468813517900u, 10110993115u }, + { 16894643909298232323u, 10364795403063433969u, 219593187308u }, + { 9066702926218949317u, 12330859528790939137u, 236561876684u }, + { 9119392417260546810u, 8973160144879916806u, 204668457234u }, + { 9723021096578315109u, 2895354388547509877u, 18486435986u }, + { 14787464248751217597u, 16766844772497556429u, 146156957475u }, + { 3733434565920249133u, 7442407174620948827u, 35908932476u }, + { 6643788868836820841u, 6683013428676659077u, 124403453701u }, + { 4729646697422664063u, 16713703375071907588u, 5362286883u }, + { 4090144564201555829u, 8791044883080637861u, 35906051675u }, + { 2109480737093400002u, 602844107089214413u, 91476563498u }, + { 16577155033369419739u, 9754832281172880875u, 42032680244u }, + { 745377248603805917u, 10587846778003503903u, 52528810517u }, + { 11305561465807999667u, 17206244172922947013u, 21573968323u }, + { 2211245518782892177u, 11620628420699303875u, 195932752365u }, + { 14170095199249735666u, 17864732368219338611u, 237629955528u }, + { 17849973668116118927u, 4146383014621345887u, 200968449082u }, + { 9020960204585720001u, 11445705075042688243u, 58224775873u }, + { 10807134002871850916u, 7369147888966546592u, 193620472915u }, + { 3925122626254791201u, 9762476865090597796u, 83399482307u }, + { 17208463291312718997u, 5507001428194242827u, 195529224931u }, + { 5145077219589447653u, 11371471148365328344u, 227298535145u }, + { 17602397765035489468u, 3148788104946538618u, 233616448686u }, + { 16422643262490753377u, 3762722308424507574u, 174170696145u }, + { 2902509461400906224u, 1156171244825745915u, 209203977585u }, + { 3422418805967265206u, 14208921674868257865u, 113062676168u }, + { 4228874576277237392u, 7903080886897905503u, 200770267187u }, + { 2553488530807495751u, 6367240794154270982u, 51428426873u }, + { 11546099176912486413u, 1623672396662369850u, 121345168815u }, + { 10460791037534167991u, 18323231215381674394u, 175088019456u }, + { 8127117908566000904u, 9842279843006544554u, 993304354u }, + { 11541304458088287306u, 7376839231308610600u, 34533551059u }, + { 6249718665174839700u, 609751749293657672u, 211399899256u }, + { 13102508413386290995u, 10386457966860989799u, 120033054708u }, + { 6274675218640661911u, 11160336020836149780u, 244563051014u }, + { 3404497118599817167u, 17947559933847409193u, 6605003027u }, + { 11258566093988562335u, 10229787001712704590u, 19972939173u }, + { 16762592482501635397u, 10441677090043619866u, 165554557864u }, + { 5550125446725071998u, 4996681336392922375u, 168566044449u }, + { 6370033225258510318u, 124497102381021895u, 33270870638u }, + { 1503521728674735398u, 8180812057779384577u, 110006749001u }, + { 4250415082606384364u, 5294232873532946716u, 73443482710u }, + { 6020091901030562974u, 2885620189169448039u, 86287000939u }, + { 16288222967151527138u, 16662526875008170507u, 107156429783u }, + { 6377016228656203782u, 15663095032402672480u, 215903277391u }, + { 8378856515587563750u, 1824281504410546614u, 79849098083u }, + { 15812881490200838483u, 9506565509584809953u, 99098894498u }, + { 4548570371183413652u, 16941136942345070055u, 162515351948u }, + { 16731431495283420383u, 15924115693705937725u, 140918380873u }, + { 14737727629551135532u, 9247807690406628462u, 73863248041u }, + { 12413722258104293893u, 7993916633864834871u, 169501324659u }, + { 800899742400762438u, 1018504409177639408u, 115433351089u }, + { 603197008376033550u, 12097800686634130718u, 177055213234u }, + { 6380777281587743935u, 6221488888422637551u, 178655823089u }, + { 10001440249018225388u, 8229322865256080421u, 241337267588u }, + { 5505914461980436708u, 7927745108183101786u, 132446112486u }, + { 1105464290051876864u, 8488683721235326653u, 230429763923u }, + { 4500443576769970176u, 11165516518170922283u, 83460172466u }, + { 2843045143185981440u, 5463648141113596927u, 178605283863u }, + { 660949699682893824u, 3958440403860778042u, 23296184959u }, + { 276549164618219520u, 5091534813990256011u, 127214587484u }, + { 4683743612465315840u, 6100166970623291280u, 92276012655u }, + { 0u, 1913011027739012426u, 111330690714u }, + { 0u, 11310957650604221440u, 154103704535u }, + { 0u, 16303817257009020928u, 215613168242u }, + { 0u, 9090406322154766336u, 114883831704u }, + { 0u, 3003279315069566976u, 152492791914u }, + { 0u, 16582887146675765248u, 106162808097u }, + { 0u, 9691746398101307392u, 33898960113u }, + { 0u, 0u, 241525390625u }, + { 0u, 0u, 33000000000u }, +}; + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_D2FIXED_FULL_TABLE_H diff --git a/libcxx/src/include/ryu/d2s.h b/libcxx/src/include/ryu/d2s.h new file mode 100644 index 000000000000..15d50fd1ee54 --- /dev/null +++ b/libcxx/src/include/ryu/d2s.h @@ -0,0 +1,62 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_DS2_H +#define _LIBCPP_SRC_INCLUDE_RYU_DS2_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +inline constexpr int __DOUBLE_MANTISSA_BITS = 52; +inline constexpr int __DOUBLE_EXPONENT_BITS = 11; +inline constexpr int __DOUBLE_BIAS = 1023; + +inline constexpr int __DOUBLE_POW5_INV_BITCOUNT = 122; +inline constexpr int __DOUBLE_POW5_BITCOUNT = 121; + +[[nodiscard]] to_chars_result __d2s_buffered_n(char* const _First, char* const _Last, const double __f, const chars_format _Fmt); + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_DS2_H diff --git a/libcxx/src/include/ryu/d2s_full_table.h b/libcxx/src/include/ryu/d2s_full_table.h new file mode 100644 index 000000000000..106fef0015c1 --- /dev/null +++ b/libcxx/src/include/ryu/d2s_full_table.h @@ -0,0 +1,368 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_D2S_FULL_TABLE_H +#define _LIBCPP_SRC_INCLUDE_RYU_D2S_FULL_TABLE_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +inline constexpr uint64_t __DOUBLE_POW5_INV_SPLIT[292][2] = { + { 1u, 288230376151711744u }, { 3689348814741910324u, 230584300921369395u }, + { 2951479051793528259u, 184467440737095516u }, { 17118578500402463900u, 147573952589676412u }, + { 12632330341676300947u, 236118324143482260u }, { 10105864273341040758u, 188894659314785808u }, + { 15463389048156653253u, 151115727451828646u }, { 17362724847566824558u, 241785163922925834u }, + { 17579528692795369969u, 193428131138340667u }, { 6684925324752475329u, 154742504910672534u }, + { 18074578149087781173u, 247588007857076054u }, { 18149011334012135262u, 198070406285660843u }, + { 3451162622983977240u, 158456325028528675u }, { 5521860196774363583u, 253530120045645880u }, + { 4417488157419490867u, 202824096036516704u }, { 7223339340677503017u, 162259276829213363u }, + { 7867994130342094503u, 259614842926741381u }, { 2605046489531765280u, 207691874341393105u }, + { 2084037191625412224u, 166153499473114484u }, { 10713157136084480204u, 265845599156983174u }, + { 12259874523609494487u, 212676479325586539u }, { 13497248433629505913u, 170141183460469231u }, + { 14216899864323388813u, 272225893536750770u }, { 11373519891458711051u, 217780714829400616u }, + { 5409467098425058518u, 174224571863520493u }, { 4965798542738183305u, 278759314981632789u }, + { 7661987648932456967u, 223007451985306231u }, { 2440241304404055250u, 178405961588244985u }, + { 3904386087046488400u, 285449538541191976u }, { 17880904128604832013u, 228359630832953580u }, + { 14304723302883865611u, 182687704666362864u }, { 15133127457049002812u, 146150163733090291u }, + { 16834306301794583852u, 233840261972944466u }, { 9778096226693756759u, 187072209578355573u }, + { 15201174610838826053u, 149657767662684458u }, { 2185786488890659746u, 239452428260295134u }, + { 5437978005854438120u, 191561942608236107u }, { 15418428848909281466u, 153249554086588885u }, + { 6222742084545298729u, 245199286538542217u }, { 16046240111861969953u, 196159429230833773u }, + { 1768945645263844993u, 156927543384667019u }, { 10209010661905972635u, 251084069415467230u }, + { 8167208529524778108u, 200867255532373784u }, { 10223115638361732810u, 160693804425899027u }, + { 1599589762411131202u, 257110087081438444u }, { 4969020624670815285u, 205688069665150755u }, + { 3975216499736652228u, 164550455732120604u }, { 13739044029062464211u, 263280729171392966u }, + { 7301886408508061046u, 210624583337114373u }, { 13220206756290269483u, 168499666669691498u }, + { 17462981995322520850u, 269599466671506397u }, { 6591687966774196033u, 215679573337205118u }, + { 12652048002903177473u, 172543658669764094u }, { 9175230360419352987u, 276069853871622551u }, + { 3650835473593572067u, 220855883097298041u }, { 17678063637842498946u, 176684706477838432u }, + { 13527506561580357021u, 282695530364541492u }, { 3443307619780464970u, 226156424291633194u }, + { 6443994910566282300u, 180925139433306555u }, { 5155195928453025840u, 144740111546645244u }, + { 15627011115008661990u, 231584178474632390u }, { 12501608892006929592u, 185267342779705912u }, + { 2622589484121723027u, 148213874223764730u }, { 4196143174594756843u, 237142198758023568u }, + { 10735612169159626121u, 189713759006418854u }, { 12277838550069611220u, 151771007205135083u }, + { 15955192865369467629u, 242833611528216133u }, { 1696107848069843133u, 194266889222572907u }, + { 12424932722681605476u, 155413511378058325u }, { 1433148282581017146u, 248661618204893321u }, + { 15903913885032455010u, 198929294563914656u }, { 9033782293284053685u, 159143435651131725u }, + { 14454051669254485895u, 254629497041810760u }, { 11563241335403588716u, 203703597633448608u }, + { 16629290697806691620u, 162962878106758886u }, { 781423413297334329u, 260740604970814219u }, + { 4314487545379777786u, 208592483976651375u }, { 3451590036303822229u, 166873987181321100u }, + { 5522544058086115566u, 266998379490113760u }, { 4418035246468892453u, 213598703592091008u }, + { 10913125826658934609u, 170878962873672806u }, { 10082303693170474728u, 273406340597876490u }, + { 8065842954536379782u, 218725072478301192u }, { 17520720807854834795u, 174980057982640953u }, + { 5897060404116273733u, 279968092772225526u }, { 1028299508551108663u, 223974474217780421u }, + { 15580034865808528224u, 179179579374224336u }, { 17549358155809824511u, 286687326998758938u }, + { 2971440080422128639u, 229349861599007151u }, { 17134547323305344204u, 183479889279205720u }, + { 13707637858644275364u, 146783911423364576u }, { 14553522944347019935u, 234854258277383322u }, + { 4264120725993795302u, 187883406621906658u }, { 10789994210278856888u, 150306725297525326u }, + { 9885293106962350374u, 240490760476040522u }, { 529536856086059653u, 192392608380832418u }, + { 7802327114352668369u, 153914086704665934u }, { 1415676938738538420u, 246262538727465495u }, + { 1132541550990830736u, 197010030981972396u }, { 15663428499760305882u, 157608024785577916u }, + { 17682787970132668764u, 252172839656924666u }, { 10456881561364224688u, 201738271725539733u }, + { 15744202878575200397u, 161390617380431786u }, { 17812026976236499989u, 258224987808690858u }, + { 3181575136763469022u, 206579990246952687u }, { 13613306553636506187u, 165263992197562149u }, + { 10713244041592678929u, 264422387516099439u }, { 12259944048016053467u, 211537910012879551u }, + { 6118606423670932450u, 169230328010303641u }, { 2411072648389671274u, 270768524816485826u }, + { 16686253377679378312u, 216614819853188660u }, { 13349002702143502650u, 173291855882550928u }, + { 17669055508687693916u, 277266969412081485u }, { 14135244406950155133u, 221813575529665188u }, + { 240149081334393137u, 177450860423732151u }, { 11452284974360759988u, 283921376677971441u }, + { 5472479164746697667u, 227137101342377153u }, { 11756680961281178780u, 181709681073901722u }, + { 2026647139541122378u, 145367744859121378u }, { 18000030682233437097u, 232588391774594204u }, + { 18089373360528660001u, 186070713419675363u }, { 3403452244197197031u, 148856570735740291u }, + { 16513570034941246220u, 238170513177184465u }, { 13210856027952996976u, 190536410541747572u }, + { 3189987192878576934u, 152429128433398058u }, { 1414630693863812771u, 243886605493436893u }, + { 8510402184574870864u, 195109284394749514u }, { 10497670562401807014u, 156087427515799611u }, + { 9417575270359070576u, 249739884025279378u }, { 14912757845771077107u, 199791907220223502u }, + { 4551508647133041040u, 159833525776178802u }, { 10971762650154775986u, 255733641241886083u }, + { 16156107749607641435u, 204586912993508866u }, { 9235537384944202825u, 163669530394807093u }, + { 11087511001168814197u, 261871248631691349u }, { 12559357615676961681u, 209496998905353079u }, + { 13736834907283479668u, 167597599124282463u }, { 18289587036911657145u, 268156158598851941u }, + { 10942320814787415393u, 214524926879081553u }, { 16132554281313752961u, 171619941503265242u }, + { 11054691591134363444u, 274591906405224388u }, { 16222450902391311402u, 219673525124179510u }, + { 12977960721913049122u, 175738820099343608u }, { 17075388340318968271u, 281182112158949773u }, + { 2592264228029443648u, 224945689727159819u }, { 5763160197165465241u, 179956551781727855u }, + { 9221056315464744386u, 287930482850764568u }, { 14755542681855616155u, 230344386280611654u }, + { 15493782960226403247u, 184275509024489323u }, { 1326979923955391628u, 147420407219591459u }, + { 9501865507812447252u, 235872651551346334u }, { 11290841220991868125u, 188698121241077067u }, + { 1653975347309673853u, 150958496992861654u }, { 10025058185179298811u, 241533595188578646u }, + { 4330697733401528726u, 193226876150862917u }, { 14532604630946953951u, 154581500920690333u }, + { 1116074521063664381u, 247330401473104534u }, { 4582208431592841828u, 197864321178483627u }, + { 14733813189500004432u, 158291456942786901u }, { 16195403473716186445u, 253266331108459042u }, + { 5577625149489128510u, 202613064886767234u }, { 8151448934333213131u, 162090451909413787u }, + { 16731667109675051333u, 259344723055062059u }, { 17074682502481951390u, 207475778444049647u }, + { 6281048372501740465u, 165980622755239718u }, { 6360328581260874421u, 265568996408383549u }, + { 8777611679750609860u, 212455197126706839u }, { 10711438158542398211u, 169964157701365471u }, + { 9759603424184016492u, 271942652322184754u }, { 11497031554089123517u, 217554121857747803u }, + { 16576322872755119460u, 174043297486198242u }, { 11764721337440549842u, 278469275977917188u }, + { 16790474699436260520u, 222775420782333750u }, { 13432379759549008416u, 178220336625867000u }, + { 3045063541568861850u, 285152538601387201u }, { 17193446092222730773u, 228122030881109760u }, + { 13754756873778184618u, 182497624704887808u }, { 18382503128506368341u, 145998099763910246u }, + { 3586563302416817083u, 233596959622256395u }, { 2869250641933453667u, 186877567697805116u }, + { 17052795772514404226u, 149502054158244092u }, { 12527077977055405469u, 239203286653190548u }, + { 17400360011128145022u, 191362629322552438u }, { 2852241564676785048u, 153090103458041951u }, + { 15631632947708587046u, 244944165532867121u }, { 8815957543424959314u, 195955332426293697u }, + { 18120812478965698421u, 156764265941034957u }, { 14235904707377476180u, 250822825505655932u }, + { 4010026136418160298u, 200658260404524746u }, { 17965416168102169531u, 160526608323619796u }, + { 2919224165770098987u, 256842573317791675u }, { 2335379332616079190u, 205474058654233340u }, + { 1868303466092863352u, 164379246923386672u }, { 6678634360490491686u, 263006795077418675u }, + { 5342907488392393349u, 210405436061934940u }, { 4274325990713914679u, 168324348849547952u }, + { 10528270399884173809u, 269318958159276723u }, { 15801313949391159694u, 215455166527421378u }, + { 1573004715287196786u, 172364133221937103u }, { 17274202803427156150u, 275782613155099364u }, + { 17508711057483635243u, 220626090524079491u }, { 10317620031244997871u, 176500872419263593u }, + { 12818843235250086271u, 282401395870821749u }, { 13944423402941979340u, 225921116696657399u }, + { 14844887537095493795u, 180736893357325919u }, { 15565258844418305359u, 144589514685860735u }, + { 6457670077359736959u, 231343223497377177u }, { 16234182506113520537u, 185074578797901741u }, + { 9297997190148906106u, 148059663038321393u }, { 11187446689496339446u, 236895460861314229u }, + { 12639306166338981880u, 189516368689051383u }, { 17490142562555006151u, 151613094951241106u }, + { 2158786396894637579u, 242580951921985771u }, { 16484424376483351356u, 194064761537588616u }, + { 9498190686444770762u, 155251809230070893u }, { 11507756283569722895u, 248402894768113429u }, + { 12895553841597688639u, 198722315814490743u }, { 17695140702761971558u, 158977852651592594u }, + { 17244178680193423523u, 254364564242548151u }, { 10105994129412828495u, 203491651394038521u }, + { 4395446488788352473u, 162793321115230817u }, { 10722063196803274280u, 260469313784369307u }, + { 1198952927958798777u, 208375451027495446u }, { 15716557601334680315u, 166700360821996356u }, + { 17767794532651667857u, 266720577315194170u }, { 14214235626121334286u, 213376461852155336u }, + { 7682039686155157106u, 170701169481724269u }, { 1223217053622520399u, 273121871170758831u }, + { 15735968901865657612u, 218497496936607064u }, { 16278123936234436413u, 174797997549285651u }, + { 219556594781725998u, 279676796078857043u }, { 7554342905309201445u, 223741436863085634u }, + { 9732823138989271479u, 178993149490468507u }, { 815121763415193074u, 286389039184749612u }, + { 11720143854957885429u, 229111231347799689u }, { 13065463898708218666u, 183288985078239751u }, + { 6763022304224664610u, 146631188062591801u }, { 3442138057275642729u, 234609900900146882u }, + { 13821756890046245153u, 187687920720117505u }, { 11057405512036996122u, 150150336576094004u }, + { 6623802375033462826u, 240240538521750407u }, { 16367088344252501231u, 192192430817400325u }, + { 13093670675402000985u, 153753944653920260u }, { 2503129006933649959u, 246006311446272417u }, + { 13070549649772650937u, 196805049157017933u }, { 17835137349301941396u, 157444039325614346u }, + { 2710778055689733971u, 251910462920982955u }, { 2168622444551787177u, 201528370336786364u }, + { 5424246770383340065u, 161222696269429091u }, { 1300097203129523457u, 257956314031086546u }, + { 15797473021471260058u, 206365051224869236u }, { 8948629602435097724u, 165092040979895389u }, + { 3249760919670425388u, 264147265567832623u }, { 9978506365220160957u, 211317812454266098u }, + { 15361502721659949412u, 169054249963412878u }, { 2442311466204457120u, 270486799941460606u }, + { 16711244431931206989u, 216389439953168484u }, { 17058344360286875914u, 173111551962534787u }, + { 12535955717491360170u, 276978483140055660u }, { 10028764573993088136u, 221582786512044528u }, + { 15401709288678291155u, 177266229209635622u }, { 9885339602917624555u, 283625966735416996u }, + { 4218922867592189321u, 226900773388333597u }, { 14443184738299482427u, 181520618710666877u }, + { 4175850161155765295u, 145216494968533502u }, { 10370709072591134795u, 232346391949653603u }, + { 15675264887556728482u, 185877113559722882u }, { 5161514280561562140u, 148701690847778306u }, + { 879725219414678777u, 237922705356445290u }, { 703780175531743021u, 190338164285156232u }, + { 11631070584651125387u, 152270531428124985u }, { 162968861732249003u, 243632850284999977u }, + { 11198421533611530172u, 194906280227999981u }, { 5269388412147313814u, 155925024182399985u }, + { 8431021459435702103u, 249480038691839976u }, { 3055468352806651359u, 199584030953471981u }, + { 17201769941212962380u, 159667224762777584u }, { 16454785461715008838u, 255467559620444135u }, + { 13163828369372007071u, 204374047696355308u }, { 17909760324981426303u, 163499238157084246u }, + { 2830174816776909822u, 261598781051334795u }, { 2264139853421527858u, 209279024841067836u }, + { 16568707141704863579u, 167423219872854268u }, { 4373838538276319787u, 267877151796566830u }, + { 3499070830621055830u, 214301721437253464u }, { 6488605479238754987u, 171441377149802771u }, + { 3003071137298187333u, 274306203439684434u }, { 6091805724580460189u, 219444962751747547u }, + { 15941491023890099121u, 175555970201398037u }, { 10748990379256517301u, 280889552322236860u }, + { 8599192303405213841u, 224711641857789488u }, { 14258051472207991719u, 179769313486231590u } +}; + +inline constexpr uint64_t __DOUBLE_POW5_SPLIT[326][2] = { + { 0u, 72057594037927936u }, { 0u, 90071992547409920u }, + { 0u, 112589990684262400u }, { 0u, 140737488355328000u }, + { 0u, 87960930222080000u }, { 0u, 109951162777600000u }, + { 0u, 137438953472000000u }, { 0u, 85899345920000000u }, + { 0u, 107374182400000000u }, { 0u, 134217728000000000u }, + { 0u, 83886080000000000u }, { 0u, 104857600000000000u }, + { 0u, 131072000000000000u }, { 0u, 81920000000000000u }, + { 0u, 102400000000000000u }, { 0u, 128000000000000000u }, + { 0u, 80000000000000000u }, { 0u, 100000000000000000u }, + { 0u, 125000000000000000u }, { 0u, 78125000000000000u }, + { 0u, 97656250000000000u }, { 0u, 122070312500000000u }, + { 0u, 76293945312500000u }, { 0u, 95367431640625000u }, + { 0u, 119209289550781250u }, { 4611686018427387904u, 74505805969238281u }, + { 10376293541461622784u, 93132257461547851u }, { 8358680908399640576u, 116415321826934814u }, + { 612489549322387456u, 72759576141834259u }, { 14600669991935148032u, 90949470177292823u }, + { 13639151471491547136u, 113686837721616029u }, { 3213881284082270208u, 142108547152020037u }, + { 4314518811765112832u, 88817841970012523u }, { 781462496279003136u, 111022302462515654u }, + { 10200200157203529728u, 138777878078144567u }, { 13292654125893287936u, 86736173798840354u }, + { 7392445620511834112u, 108420217248550443u }, { 4628871007212404736u, 135525271560688054u }, + { 16728102434789916672u, 84703294725430033u }, { 7075069988205232128u, 105879118406787542u }, + { 18067209522111315968u, 132348898008484427u }, { 8986162942105878528u, 82718061255302767u }, + { 6621017659204960256u, 103397576569128459u }, { 3664586055578812416u, 129246970711410574u }, + { 16125424340018921472u, 80779356694631608u }, { 1710036351314100224u, 100974195868289511u }, + { 15972603494424788992u, 126217744835361888u }, { 9982877184015493120u, 78886090522101180u }, + { 12478596480019366400u, 98607613152626475u }, { 10986559581596820096u, 123259516440783094u }, + { 2254913720070624656u, 77037197775489434u }, { 12042014186943056628u, 96296497219361792u }, + { 15052517733678820785u, 120370621524202240u }, { 9407823583549262990u, 75231638452626400u }, + { 11759779479436578738u, 94039548065783000u }, { 14699724349295723422u, 117549435082228750u }, + { 4575641699882439235u, 73468396926392969u }, { 10331238143280436948u, 91835496157991211u }, + { 8302361660673158281u, 114794370197489014u }, { 1154580038986672043u, 143492962746861268u }, + { 9944984561221445835u, 89683101716788292u }, { 12431230701526807293u, 112103877145985365u }, + { 1703980321626345405u, 140129846432481707u }, { 17205888765512323542u, 87581154020301066u }, + { 12283988920035628619u, 109476442525376333u }, { 1519928094762372062u, 136845553156720417u }, + { 12479170105294952299u, 85528470722950260u }, { 15598962631618690374u, 106910588403687825u }, + { 5663645234241199255u, 133638235504609782u }, { 17374836326682913246u, 83523897190381113u }, + { 7883487353071477846u, 104404871487976392u }, { 9854359191339347308u, 130506089359970490u }, + { 10770660513014479971u, 81566305849981556u }, { 13463325641268099964u, 101957882312476945u }, + { 2994098996302961243u, 127447352890596182u }, { 15706369927971514489u, 79654595556622613u }, + { 5797904354682229399u, 99568244445778267u }, { 2635694424925398845u, 124460305557222834u }, + { 6258995034005762182u, 77787690973264271u }, { 3212057774079814824u, 97234613716580339u }, + { 17850130272881932242u, 121543267145725423u }, { 18073860448192289507u, 75964541966078389u }, + { 8757267504958198172u, 94955677457597987u }, { 6334898362770359811u, 118694596821997484u }, + { 13182683513586250689u, 74184123013748427u }, { 11866668373555425458u, 92730153767185534u }, + { 5609963430089506015u, 115912692208981918u }, { 17341285199088104971u, 72445432630613698u }, + { 12453234462005355406u, 90556790788267123u }, { 10954857059079306353u, 113195988485333904u }, + { 13693571323849132942u, 141494985606667380u }, { 17781854114260483896u, 88434366004167112u }, + { 3780573569116053255u, 110542957505208891u }, { 114030942967678664u, 138178696881511114u }, + { 4682955357782187069u, 86361685550944446u }, { 15077066234082509644u, 107952106938680557u }, + { 5011274737320973344u, 134940133673350697u }, { 14661261756894078100u, 84337583545844185u }, + { 4491519140835433913u, 105421979432305232u }, { 5614398926044292391u, 131777474290381540u }, + { 12732371365632458552u, 82360921431488462u }, { 6692092170185797382u, 102951151789360578u }, + { 17588487249587022536u, 128688939736700722u }, { 15604490549419276989u, 80430587335437951u }, + { 14893927168346708332u, 100538234169297439u }, { 14005722942005997511u, 125672792711621799u }, + { 15671105866394830300u, 78545495444763624u }, { 1142138259283986260u, 98181869305954531u }, + { 15262730879387146537u, 122727336632443163u }, { 7233363790403272633u, 76704585395276977u }, + { 13653390756431478696u, 95880731744096221u }, { 3231680390257184658u, 119850914680120277u }, + { 4325643253124434363u, 74906821675075173u }, { 10018740084832930858u, 93633527093843966u }, + { 3300053069186387764u, 117041908867304958u }, { 15897591223523656064u, 73151193042065598u }, + { 10648616992549794273u, 91438991302581998u }, { 4087399203832467033u, 114298739128227498u }, + { 14332621041645359599u, 142873423910284372u }, { 18181260187883125557u, 89295889943927732u }, + { 4279831161144355331u, 111619862429909666u }, { 14573160988285219972u, 139524828037387082u }, + { 13719911636105650386u, 87203017523366926u }, { 7926517508277287175u, 109003771904208658u }, + { 684774848491833161u, 136254714880260823u }, { 7345513307948477581u, 85159196800163014u }, + { 18405263671790372785u, 106448996000203767u }, { 18394893571310578077u, 133061245000254709u }, + { 13802651491282805250u, 83163278125159193u }, { 3418256308821342851u, 103954097656448992u }, + { 4272820386026678563u, 129942622070561240u }, { 2670512741266674102u, 81214138794100775u }, + { 17173198981865506339u, 101517673492625968u }, { 3019754653622331308u, 126897091865782461u }, + { 4193189667727651020u, 79310682416114038u }, { 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{ 7330497575943398595u, 83973451344588609u }, { 13774807988356636147u, 104966814180735761u }, + { 3383451930163631472u, 131208517725919702u }, { 15949715511634433382u, 82005323578699813u }, + { 6102086334260878016u, 102506654473374767u }, { 3015921899398709616u, 128133318091718459u }, + { 18025852251620051174u, 80083323807324036u }, { 4085571240815512351u, 100104154759155046u }, + { 14330336087874166247u, 125130193448943807u }, { 15873989082562435760u, 78206370905589879u }, + { 15230800334775656796u, 97757963631987349u }, { 5203442363187407284u, 122197454539984187u }, + { 946308467778435600u, 76373409087490117u }, { 5794571603150432404u, 95466761359362646u }, + { 16466586540792816313u, 119333451699203307u }, { 7985773578781816244u, 74583407312002067u }, + { 5370530955049882401u, 93229259140002584u }, { 6713163693812353001u, 116536573925003230u }, + { 18030785363914884337u, 72835358703127018u }, { 13315109668038829614u, 91044198378908773u }, + { 2808829029766373305u, 113805247973635967u 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}, { 4997906377621825891u, 138322616570451633u }, + { 14652906532082110942u, 86451635356532270u }, { 9092761128247862869u, 108064544195665338u }, + { 2142579373455052779u, 135080680244581673u }, { 12868327154477877747u, 84425425152863545u }, + { 2250350887815183471u, 105531781441079432u }, { 2812938609768979339u, 131914726801349290u }, + { 6369772649532999991u, 82446704250843306u }, { 17185587848771025797u, 103058380313554132u }, + { 3035240737254230630u, 128822975391942666u }, { 6508711479211282048u, 80514359619964166u }, + { 17359261385868878368u, 100642949524955207u }, { 17087390713908710056u, 125803686906194009u }, + { 3762090168551861929u, 78627304316371256u }, { 4702612710689827411u, 98284130395464070u }, + { 15101637925217060072u, 122855162994330087u }, { 16356052730901744401u, 76784476871456304u }, + { 1998321839917628885u, 95980596089320381u }, { 7109588318324424010u, 119975745111650476u }, + { 13666864735807540814u, 74984840694781547u }, { 12471894901332038114u, 93731050868476934u }, + { 6366496589810271835u, 117163813585596168u }, { 3979060368631419896u, 73227383490997605u }, + { 9585511479216662775u, 91534229363747006u }, { 2758517312166052660u, 114417786704683758u }, + { 12671518677062341634u, 143022233380854697u }, { 1002170145522881665u, 89388895863034186u }, + { 10476084718758377889u, 111736119828792732u }, { 13095105898447972362u, 139670149785990915u }, + { 5878598177316288774u, 87293843616244322u }, { 16571619758500136775u, 109117304520305402u }, + { 11491152661270395161u, 136396630650381753u }, { 264441385652915120u, 85247894156488596u }, + { 330551732066143900u, 106559867695610745u }, { 5024875683510067779u, 133199834619513431u }, + { 10058076329834874218u, 83249896637195894u }, { 3349223375438816964u, 104062370796494868u }, + { 4186529219298521205u, 130077963495618585u }, { 14145795808130045513u, 81298727184761615u }, + { 13070558741735168987u, 101623408980952019u }, { 11726512408741573330u, 127029261226190024u }, + { 7329070255463483331u, 79393288266368765u }, { 13773023837756742068u, 99241610332960956u }, + { 17216279797195927585u, 124052012916201195u }, { 8454331864033760789u, 77532508072625747u }, + { 5956228811614813082u, 96915635090782184u }, { 7445286014518516353u, 121144543863477730u }, + { 9264989777501460624u, 75715339914673581u }, { 16192923240304213684u, 94644174893341976u }, + { 1794409976670715490u, 118305218616677471u }, { 8039035263060279037u, 73940761635423419u }, + { 5437108060397960892u, 92425952044279274u }, { 16019757112352226923u, 115532440055349092u }, + { 788976158365366019u, 72207775034593183u }, { 14821278253238871236u, 90259718793241478u }, + { 9303225779693813237u, 112824648491551848u }, { 11629032224617266546u, 141030810614439810u }, + { 11879831158813179495u, 88144256634024881u }, { 1014730893234310657u, 110180320792531102u }, + { 10491785653397664129u, 137725400990663877u }, { 8863209042587234033u, 86078375619164923u }, + { 6467325284806654637u, 107597969523956154u }, { 17307528642863094104u, 134497461904945192u }, + { 10817205401789433815u, 84060913690590745u }, { 18133192770664180173u, 105076142113238431u }, + { 18054804944902837312u, 131345177641548039u }, { 18201782118205355176u, 82090736025967524u }, + { 4305483574047142354u, 102613420032459406u }, { 14605226504413703751u, 128266775040574257u }, + { 2210737537617482988u, 80166734400358911u }, { 16598479977304017447u, 100208418000448638u }, + { 11524727934775246001u, 125260522500560798u }, { 2591268940807140847u, 78287826562850499u }, + { 17074144231291089770u, 97859783203563123u }, { 16730994270686474309u, 122324729004453904u }, + { 10456871419179046443u, 76452955627783690u }, { 3847717237119032246u, 95566194534729613u }, + { 9421332564826178211u, 119457743168412016u }, { 5888332853016361382u, 74661089480257510u }, + { 16583788103125227536u, 93326361850321887u }, { 16118049110479146516u, 116657952312902359u }, + { 16991309721690548428u, 72911220195563974u }, { 12015765115258409727u, 91139025244454968u }, + { 15019706394073012159u, 113923781555568710u }, { 9551260955736489391u, 142404726944460888u }, + { 5969538097335305869u, 89002954340288055u }, { 2850236603241744433u, 111253692925360069u } +}; + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_D2S_FULL_TABLE_H diff --git a/libcxx/src/include/ryu/d2s_intrinsics.h b/libcxx/src/include/ryu/d2s_intrinsics.h new file mode 100644 index 000000000000..9f6632e1b2b4 --- /dev/null +++ b/libcxx/src/include/ryu/d2s_intrinsics.h @@ -0,0 +1,257 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_DS2_INTRINSICS_H +#define _LIBCPP_SRC_INCLUDE_RYU_DS2_INTRINSICS_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if defined(_M_X64) && defined(_MSC_VER) +#define _LIBCPP_INTRINSIC128 1 +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_umul128(const uint64_t __a, const uint64_t __b, uint64_t* const __productHi) { + return _umul128(__a, __b, __productHi); +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_shiftright128(const uint64_t __lo, const uint64_t __hi, const uint32_t __dist) { + // For the __shiftright128 intrinsic, the shift value is always + // modulo 64. + // In the current implementation of the double-precision version + // of Ryu, the shift value is always < 64. + // (The shift value is in the range [49, 58].) + // Check this here in case a future change requires larger shift + // values. In this case this function needs to be adjusted. + _LIBCPP_ASSERT(__dist < 64, ""); + return __shiftright128(__lo, __hi, static_cast<unsigned char>(__dist)); +} + +// ^^^ intrinsics available ^^^ / vvv __int128 available vvv +#elif defined(__SIZEOF_INT128__) && ( \ + (defined(__clang__) && !defined(_MSC_VER)) || \ + (defined(__GNUC__) && !defined(__clang__) && !defined(__CUDACC__))) +#define _LIBCPP_INTRINSIC128 1 + // We have __uint128 support in clang or gcc +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_umul128(const uint64_t __a, const uint64_t __b, uint64_t* const __productHi) { + auto __temp = __a * (unsigned __int128)__b; + *__productHi = __temp >> 64; + return static_cast<uint64_t>(__temp); +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_shiftright128(const uint64_t __lo, const uint64_t __hi, const uint32_t __dist) { + // In the current implementation of the double-precision version + // of Ryu, the shift value is always < 64. + // (The shift value is in the range [49, 58].) + // Check this here in case a future change requires larger shift + // values. In this case this function needs to be adjusted. + _LIBCPP_ASSERT(__dist < 64, ""); + auto __temp = __lo | ((unsigned __int128)__hi << 64); + // For x64 128-bit shfits using the `shrd` instruction and two 64-bit + // registers, the shift value is modulo 64. Thus the `& 63` is free. + return static_cast<uint64_t>(__temp >> (__dist & 63)); +} +#else // ^^^ __int128 available ^^^ / vvv intrinsics unavailable vvv + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline _LIBCPP_ALWAYS_INLINE uint64_t __ryu_umul128(const uint64_t __a, const uint64_t __b, uint64_t* const __productHi) { + // TRANSITION, VSO-634761 + // The casts here help MSVC to avoid calls to the __allmul library function. + const uint32_t __aLo = static_cast<uint32_t>(__a); + const uint32_t __aHi = static_cast<uint32_t>(__a >> 32); + const uint32_t __bLo = static_cast<uint32_t>(__b); + const uint32_t __bHi = static_cast<uint32_t>(__b >> 32); + + const uint64_t __b00 = static_cast<uint64_t>(__aLo) * __bLo; + const uint64_t __b01 = static_cast<uint64_t>(__aLo) * __bHi; + const uint64_t __b10 = static_cast<uint64_t>(__aHi) * __bLo; + const uint64_t __b11 = static_cast<uint64_t>(__aHi) * __bHi; + + const uint32_t __b00Lo = static_cast<uint32_t>(__b00); + const uint32_t __b00Hi = static_cast<uint32_t>(__b00 >> 32); + + const uint64_t __mid1 = __b10 + __b00Hi; + const uint32_t __mid1Lo = static_cast<uint32_t>(__mid1); + const uint32_t __mid1Hi = static_cast<uint32_t>(__mid1 >> 32); + + const uint64_t __mid2 = __b01 + __mid1Lo; + const uint32_t __mid2Lo = static_cast<uint32_t>(__mid2); + const uint32_t __mid2Hi = static_cast<uint32_t>(__mid2 >> 32); + + const uint64_t __pHi = __b11 + __mid1Hi + __mid2Hi; + const uint64_t __pLo = (static_cast<uint64_t>(__mid2Lo) << 32) | __b00Lo; + + *__productHi = __pHi; + return __pLo; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __ryu_shiftright128(const uint64_t __lo, const uint64_t __hi, const uint32_t __dist) { + // We don't need to handle the case __dist >= 64 here (see above). + _LIBCPP_ASSERT(__dist < 64, ""); +#ifdef _LIBCPP_64_BIT + _LIBCPP_ASSERT(__dist > 0, ""); + return (__hi << (64 - __dist)) | (__lo >> __dist); +#else // ^^^ 64-bit ^^^ / vvv 32-bit vvv + // Avoid a 64-bit shift by taking advantage of the range of shift values. + _LIBCPP_ASSERT(__dist >= 32, ""); + return (__hi << (64 - __dist)) | (static_cast<uint32_t>(__lo >> 32) >> (__dist - 32)); +#endif // ^^^ 32-bit ^^^ +} + +#endif // ^^^ intrinsics unavailable ^^^ + +#ifndef _LIBCPP_64_BIT + +// Returns the high 64 bits of the 128-bit product of __a and __b. +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __umulh(const uint64_t __a, const uint64_t __b) { + // Reuse the __ryu_umul128 implementation. + // Optimizers will likely eliminate the instructions used to compute the + // low part of the product. + uint64_t __hi; + (void) __ryu_umul128(__a, __b, &__hi); + return __hi; +} + +// On 32-bit platforms, compilers typically generate calls to library +// functions for 64-bit divisions, even if the divisor is a constant. +// +// TRANSITION, LLVM-37932 +// +// The functions here perform division-by-constant using multiplications +// in the same way as 64-bit compilers would do. +// +// NB: +// The multipliers and shift values are the ones generated by clang x64 +// for expressions like x/5, x/10, etc. + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div5(const uint64_t __x) { + return __umulh(__x, 0xCCCCCCCCCCCCCCCDu) >> 2; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div10(const uint64_t __x) { + return __umulh(__x, 0xCCCCCCCCCCCCCCCDu) >> 3; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div100(const uint64_t __x) { + return __umulh(__x >> 2, 0x28F5C28F5C28F5C3u) >> 2; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e8(const uint64_t __x) { + return __umulh(__x, 0xABCC77118461CEFDu) >> 26; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e9(const uint64_t __x) { + return __umulh(__x >> 9, 0x44B82FA09B5A53u) >> 11; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mod1e9(const uint64_t __x) { + // Avoid 64-bit math as much as possible. + // Returning static_cast<uint32_t>(__x - 1000000000 * __div1e9(__x)) would + // perform 32x64-bit multiplication and 64-bit subtraction. + // __x and 1000000000 * __div1e9(__x) are guaranteed to differ by + // less than 10^9, so their highest 32 bits must be identical, + // so we can truncate both sides to uint32_t before subtracting. + // We can also simplify static_cast<uint32_t>(1000000000 * __div1e9(__x)). + // We can truncate before multiplying instead of after, as multiplying + // the highest 32 bits of __div1e9(__x) can't affect the lowest 32 bits. + return static_cast<uint32_t>(__x) - 1000000000 * static_cast<uint32_t>(__div1e9(__x)); +} + +#else // ^^^ 32-bit ^^^ / vvv 64-bit vvv + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div5(const uint64_t __x) { + return __x / 5; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div10(const uint64_t __x) { + return __x / 10; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div100(const uint64_t __x) { + return __x / 100; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e8(const uint64_t __x) { + return __x / 100000000; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __div1e9(const uint64_t __x) { + return __x / 1000000000; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mod1e9(const uint64_t __x) { + return static_cast<uint32_t>(__x - 1000000000 * __div1e9(__x)); +} + +#endif // ^^^ 64-bit ^^^ + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __pow5Factor(uint64_t __value) { + uint32_t __count = 0; + for (;;) { + _LIBCPP_ASSERT(__value != 0, ""); + const uint64_t __q = __div5(__value); + const uint32_t __r = static_cast<uint32_t>(__value) - 5 * static_cast<uint32_t>(__q); + if (__r != 0) { + break; + } + __value = __q; + ++__count; + } + return __count; +} + +// Returns true if __value is divisible by 5^__p. +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf5(const uint64_t __value, const uint32_t __p) { + // I tried a case distinction on __p, but there was no performance difference. + return __pow5Factor(__value) >= __p; +} + +// Returns true if __value is divisible by 2^__p. +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf2(const uint64_t __value, const uint32_t __p) { + _LIBCPP_ASSERT(__value != 0, ""); + _LIBCPP_ASSERT(__p < 64, ""); + // __builtin_ctzll doesn't appear to be faster here. + return (__value & ((1ull << __p) - 1)) == 0; +} + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_DS2_INTRINSICS_H diff --git a/libcxx/src/include/ryu/digit_table.h b/libcxx/src/include/ryu/digit_table.h new file mode 100644 index 000000000000..3962f6693140 --- /dev/null +++ b/libcxx/src/include/ryu/digit_table.h @@ -0,0 +1,68 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_DIGIT_TABLE_H +#define _LIBCPP_SRC_INCLUDE_RYU_DIGIT_TABLE_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +// A table of all two-digit numbers. This is used to speed up decimal digit +// generation by copying pairs of digits into the final output. +inline constexpr char __DIGIT_TABLE[200] = { + '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9', + '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9', + '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9', + '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9', + '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9', + '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9', + '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9', + '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9', + '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9', + '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9' +}; + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_DIGIT_TABLE_H diff --git a/libcxx/src/include/ryu/f2s.h b/libcxx/src/include/ryu/f2s.h new file mode 100644 index 000000000000..80fdcd458b72 --- /dev/null +++ b/libcxx/src/include/ryu/f2s.h @@ -0,0 +1,55 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_FS2_H +#define _LIBCPP_SRC_INCLUDE_RYU_FS2_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" + +_LIBCPP_BEGIN_NAMESPACE_STD + +[[nodiscard]] to_chars_result __f2s_buffered_n(char* const _First, char* const _Last, const float __f, const chars_format _Fmt); + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_FS2_H diff --git a/libcxx/src/include/ryu/ryu.h b/libcxx/src/include/ryu/ryu.h new file mode 100644 index 000000000000..9c4025fc61a5 --- /dev/null +++ b/libcxx/src/include/ryu/ryu.h @@ -0,0 +1,148 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#ifndef _LIBCPP_SRC_INCLUDE_RYU_RYU_H +#define _LIBCPP_SRC_INCLUDE_RYU_RYU_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__charconv/chars_format.h" +#include "__charconv/to_chars_result.h" +#include "__config" +#include "__debug" +#include "__errc" +#include "cstdint" +#include "cstring" +#include "type_traits" +#include "include/ryu/f2s.h" +#include "include/ryu/d2s.h" +#include "include/ryu/d2fixed.h" + +#if defined(_M_X64) && defined(_LIBCPP_COMPILER_MSVC) +#include <intrin0.h> // for _umul128() and __shiftright128() +#endif // defined(_M_X64) && defined(_LIBCPP_COMPILER_MSVC) + +#if defined(_WIN64) || defined(_M_AMD64) || defined(__x86_64__) || defined(__aarch64__) +#define _LIBCPP_64_BIT +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +// https://github.com/ulfjack/ryu/tree/59661c3/ryu + +#if !defined(_LIBCPP_COMPILER_MSVC) +_LIBCPP_HIDE_FROM_ABI inline unsigned char _BitScanForward64(unsigned long* __index, unsigned long long __mask) { + if (__mask == 0) { + return false; + } + *__index = __builtin_ctzll(__mask); + return true; +} + +_LIBCPP_HIDE_FROM_ABI inline unsigned char _BitScanForward(unsigned long* __index, unsigned int __mask) { + if (__mask == 0) { + return false; + } + *__index = __builtin_ctz(__mask); + return true; +} +#endif // _LIBCPP_COMPILER_MSVC + +template <class _Floating> +[[nodiscard]] to_chars_result _Floating_to_chars_ryu( + char* const _First, char* const _Last, const _Floating _Value, const chars_format _Fmt) noexcept { + if constexpr (_IsSame<_Floating, float>::value) { + return __f2s_buffered_n(_First, _Last, _Value, _Fmt); + } else { + return __d2s_buffered_n(_First, _Last, _Value, _Fmt); + } +} + +template <class _Floating> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI to_chars_result _Floating_to_chars_scientific_precision( + char* const _First, char* const _Last, const _Floating _Value, int _Precision) noexcept { + + // C11 7.21.6.1 "The fprintf function"/5: + // "A negative precision argument is taken as if the precision were omitted." + // /8: "e,E [...] if the precision is missing, it is taken as 6" + + if (_Precision < 0) { + _Precision = 6; + } else if (_Precision < 1'000'000'000) { // Match ' to fix compilation with GCC in C++11 mode + // _Precision is ok. + } else { + // Avoid integer overflow. + // (This defensive check is slightly nonconformant; it can be carefully improved in the future.) + return {_Last, errc::value_too_large}; + } + + return __d2exp_buffered_n(_First, _Last, _Value, static_cast<uint32_t>(_Precision)); +} + +template <class _Floating> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI to_chars_result _Floating_to_chars_fixed_precision( + char* const _First, char* const _Last, const _Floating _Value, int _Precision) noexcept { + + // C11 7.21.6.1 "The fprintf function"/5: + // "A negative precision argument is taken as if the precision were omitted." + // /8: "f,F [...] If the precision is missing, it is taken as 6" + + if (_Precision < 0) { + _Precision = 6; + } else if (_Precision < 1'000'000'000) { // Match ' to fix compilation with GCC in C++11 mode + // _Precision is ok. + } else { + // Avoid integer overflow. + // (This defensive check is slightly nonconformant; it can be carefully improved in the future.) + return {_Last, errc::value_too_large}; + } + + return __d2fixed_buffered_n(_First, _Last, _Value, static_cast<uint32_t>(_Precision)); +} + +#undef _LIBCPP_64_BIT +#undef _LIBCPP_INTRINSIC128 + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on + +#endif // _LIBCPP_SRC_INCLUDE_RYU_RYU_H diff --git a/libcxx/src/include/to_chars_floating_point.h b/libcxx/src/include/to_chars_floating_point.h new file mode 100644 index 000000000000..081d671fc59e --- /dev/null +++ b/libcxx/src/include/to_chars_floating_point.h @@ -0,0 +1,1076 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// This implementation is dedicated to the memory of Mary and Thavatchai. + +#ifndef _LIBCPP_SRC_INCLUDE_TO_CHARS_FLOATING_POINT_H +#define _LIBCPP_SRC_INCLUDE_TO_CHARS_FLOATING_POINT_H + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__algorithm/find.h" +#include "__algorithm/find_if.h" +#include "__algorithm/lower_bound.h" +#include "__algorithm/min.h" +#include "__config" +#include "__iterator/access.h" +#include "__iterator/size.h" +#include "bit" +#include "cfloat" +#include "climits" +#include "include/ryu/ryu.h" + +_LIBCPP_BEGIN_NAMESPACE_STD + +namespace __itoa { +inline constexpr char _Charconv_digits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', + 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'}; +static_assert(_VSTD::size(_Charconv_digits) == 36); +} // __itoa + +// vvvvvvvvvv DERIVED FROM corecrt_internal_fltintrn.h vvvvvvvvvv + +template <class _FloatingType> +struct _Floating_type_traits; + +template <> +struct _Floating_type_traits<float> { + static constexpr int32_t _Mantissa_bits = FLT_MANT_DIG; + static constexpr int32_t _Exponent_bits = sizeof(float) * CHAR_BIT - FLT_MANT_DIG; + + static constexpr int32_t _Maximum_binary_exponent = FLT_MAX_EXP - 1; + static constexpr int32_t _Minimum_binary_exponent = FLT_MIN_EXP - 1; + + static constexpr int32_t _Exponent_bias = 127; + + static constexpr int32_t _Sign_shift = _Exponent_bits + _Mantissa_bits - 1; + static constexpr int32_t _Exponent_shift = _Mantissa_bits - 1; + + using _Uint_type = uint32_t; + + static constexpr uint32_t _Exponent_mask = (1u << _Exponent_bits) - 1; + static constexpr uint32_t _Normal_mantissa_mask = (1u << _Mantissa_bits) - 1; + static constexpr uint32_t _Denormal_mantissa_mask = (1u << (_Mantissa_bits - 1)) - 1; + static constexpr uint32_t _Special_nan_mantissa_mask = 1u << (_Mantissa_bits - 2); + static constexpr uint32_t _Shifted_sign_mask = 1u << _Sign_shift; + static constexpr uint32_t _Shifted_exponent_mask = _Exponent_mask << _Exponent_shift; +}; + +template <> +struct _Floating_type_traits<double> { + static constexpr int32_t _Mantissa_bits = DBL_MANT_DIG; + static constexpr int32_t _Exponent_bits = sizeof(double) * CHAR_BIT - DBL_MANT_DIG; + + static constexpr int32_t _Maximum_binary_exponent = DBL_MAX_EXP - 1; + static constexpr int32_t _Minimum_binary_exponent = DBL_MIN_EXP - 1; + + static constexpr int32_t _Exponent_bias = 1023; + + static constexpr int32_t _Sign_shift = _Exponent_bits + _Mantissa_bits - 1; + static constexpr int32_t _Exponent_shift = _Mantissa_bits - 1; + + using _Uint_type = uint64_t; + + static constexpr uint64_t _Exponent_mask = (1ULL << _Exponent_bits) - 1; + static constexpr uint64_t _Normal_mantissa_mask = (1ULL << _Mantissa_bits) - 1; + static constexpr uint64_t _Denormal_mantissa_mask = (1ULL << (_Mantissa_bits - 1)) - 1; + static constexpr uint64_t _Special_nan_mantissa_mask = 1ULL << (_Mantissa_bits - 2); + static constexpr uint64_t _Shifted_sign_mask = 1ULL << _Sign_shift; + static constexpr uint64_t _Shifted_exponent_mask = _Exponent_mask << _Exponent_shift; +}; + +// ^^^^^^^^^^ DERIVED FROM corecrt_internal_fltintrn.h ^^^^^^^^^^ + +// FUNCTION to_chars (FLOATING-POINT TO STRING) +template <class _Floating> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI +to_chars_result _Floating_to_chars_hex_precision( + char* _First, char* const _Last, const _Floating _Value, int _Precision) noexcept { + + // * Determine the effective _Precision. + // * Later, we'll decrement _Precision when printing each hexit after the decimal point. + + // The hexits after the decimal point correspond to the explicitly stored fraction bits. + // float explicitly stores 23 fraction bits. 23 / 4 == 5.75, which is 6 hexits. + // double explicitly stores 52 fraction bits. 52 / 4 == 13, which is 13 hexits. + constexpr int _Full_precision = _IsSame<_Floating, float>::value ? 6 : 13; + constexpr int _Adjusted_explicit_bits = _Full_precision * 4; + + if (_Precision < 0) { + // C11 7.21.6.1 "The fprintf function"/5: "A negative precision argument is taken as if the precision were + // omitted." /8: "if the precision is missing and FLT_RADIX is a power of 2, then the precision is sufficient + // for an exact representation of the value" + _Precision = _Full_precision; + } + + // * Extract the _Ieee_mantissa and _Ieee_exponent. + using _Traits = _Floating_type_traits<_Floating>; + using _Uint_type = typename _Traits::_Uint_type; + + const _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value); + const _Uint_type _Ieee_mantissa = _Uint_value & _Traits::_Denormal_mantissa_mask; + const int32_t _Ieee_exponent = static_cast<int32_t>(_Uint_value >> _Traits::_Exponent_shift); + + // * Prepare the _Adjusted_mantissa. This is aligned to hexit boundaries, + // * with the implicit bit restored (0 for zero values and subnormal values, 1 for normal values). + // * Also calculate the _Unbiased_exponent. This unifies the processing of zero, subnormal, and normal values. + _Uint_type _Adjusted_mantissa; + + if constexpr (_IsSame<_Floating, float>::value) { + _Adjusted_mantissa = _Ieee_mantissa << 1; // align to hexit boundary (23 isn't divisible by 4) + } else { + _Adjusted_mantissa = _Ieee_mantissa; // already aligned (52 is divisible by 4) + } + + int32_t _Unbiased_exponent; + + if (_Ieee_exponent == 0) { // zero or subnormal + // implicit bit is 0 + + if (_Ieee_mantissa == 0) { // zero + // C11 7.21.6.1 "The fprintf function"/8: "If the value is zero, the exponent is zero." + _Unbiased_exponent = 0; + } else { // subnormal + _Unbiased_exponent = 1 - _Traits::_Exponent_bias; + } + } else { // normal + _Adjusted_mantissa |= _Uint_type{1} << _Adjusted_explicit_bits; // implicit bit is 1 + _Unbiased_exponent = _Ieee_exponent - _Traits::_Exponent_bias; + } + + // _Unbiased_exponent is within [-126, 127] for float, [-1022, 1023] for double. + + // * Decompose _Unbiased_exponent into _Sign_character and _Absolute_exponent. + char _Sign_character; + uint32_t _Absolute_exponent; + + if (_Unbiased_exponent < 0) { + _Sign_character = '-'; + _Absolute_exponent = static_cast<uint32_t>(-_Unbiased_exponent); + } else { + _Sign_character = '+'; + _Absolute_exponent = static_cast<uint32_t>(_Unbiased_exponent); + } + + // _Absolute_exponent is within [0, 127] for float, [0, 1023] for double. + + // * Perform a single bounds check. + { + int32_t _Exponent_length; + + if (_Absolute_exponent < 10) { + _Exponent_length = 1; + } else if (_Absolute_exponent < 100) { + _Exponent_length = 2; + } else if constexpr (_IsSame<_Floating, float>::value) { + _Exponent_length = 3; + } else if (_Absolute_exponent < 1000) { + _Exponent_length = 3; + } else { + _Exponent_length = 4; + } + + // _Precision might be enormous; avoid integer overflow by testing it separately. + ptrdiff_t _Buffer_size = _Last - _First; + + if (_Buffer_size < _Precision) { + return {_Last, errc::value_too_large}; + } + + _Buffer_size -= _Precision; + + const int32_t _Length_excluding_precision = 1 // leading hexit + + static_cast<int32_t>(_Precision > 0) // possible decimal point + // excluding `+ _Precision`, hexits after decimal point + + 2 // "p+" or "p-" + + _Exponent_length; // exponent + + if (_Buffer_size < _Length_excluding_precision) { + return {_Last, errc::value_too_large}; + } + } + + // * Perform rounding when we've been asked to omit hexits. + if (_Precision < _Full_precision) { + // _Precision is within [0, 5] for float, [0, 12] for double. + + // _Dropped_bits is within [4, 24] for float, [4, 52] for double. + const int _Dropped_bits = (_Full_precision - _Precision) * 4; + + // Perform rounding by adding an appropriately-shifted bit. + + // This can propagate carries all the way into the leading hexit. Examples: + // "0.ff9" rounded to a precision of 2 is "1.00". + // "1.ff9" rounded to a precision of 2 is "2.00". + + // Note that the leading hexit participates in the rounding decision. Examples: + // "0.8" rounded to a precision of 0 is "0". + // "1.8" rounded to a precision of 0 is "2". + + // Reference implementation with suboptimal codegen: + // bool _Should_round_up(bool _Lsb_bit, bool _Round_bit, bool _Has_tail_bits) { + // // If there are no insignificant set bits, the value is exactly-representable and should not be rounded. + // // + // // If there are insignificant set bits, we need to round according to round_to_nearest. + // // We need to handle two cases: we round up if either [1] the value is slightly greater + // // than the midpoint between two exactly-representable values or [2] the value is exactly the midpoint + // // between two exactly-representable values and the greater of the two is even (this is "round-to-even"). + // return _Round_bit && (_Has_tail_bits || _Lsb_bit); + //} + // const bool _Lsb_bit = (_Adjusted_mantissa & (_Uint_type{1} << _Dropped_bits)) != 0; + // const bool _Round_bit = (_Adjusted_mantissa & (_Uint_type{1} << (_Dropped_bits - 1))) != 0; + // const bool _Has_tail_bits = (_Adjusted_mantissa & ((_Uint_type{1} << (_Dropped_bits - 1)) - 1)) != 0; + // const bool _Should_round = _Should_round_up(_Lsb_bit, _Round_bit, _Has_tail_bits); + // _Adjusted_mantissa += _Uint_type{_Should_round} << _Dropped_bits; + + // Example for optimized implementation: Let _Dropped_bits be 8. + // Bit index: ...[8]76543210 + // _Adjusted_mantissa: ...[L]RTTTTTTT (not depicting known details, like hexit alignment) + // By focusing on the bit at index _Dropped_bits, we can avoid unnecessary branching and shifting. + + // Bit index: ...[8]76543210 + // _Lsb_bit: ...[L]RTTTTTTT + const _Uint_type _Lsb_bit = _Adjusted_mantissa; + + // Bit index: ...9[8]76543210 + // _Round_bit: ...L[R]TTTTTTT0 + const _Uint_type _Round_bit = _Adjusted_mantissa << 1; + + // We can detect (without branching) whether any of the trailing bits are set. + // Due to _Should_round below, this computation will be used if and only if R is 1, so we can assume that here. + // Bit index: ...9[8]76543210 + // _Round_bit: ...L[1]TTTTTTT0 + // _Has_tail_bits: ....[H]........ + + // If all of the trailing bits T are 0, then `_Round_bit - 1` will produce 0 for H (due to R being 1). + // If any of the trailing bits T are 1, then `_Round_bit - 1` will produce 1 for H (due to R being 1). + const _Uint_type _Has_tail_bits = _Round_bit - 1; + + // Finally, we can use _Should_round_up() logic with bitwise-AND and bitwise-OR, + // selecting just the bit at index _Dropped_bits. This is the appropriately-shifted bit that we want. + const _Uint_type _Should_round = _Round_bit & (_Has_tail_bits | _Lsb_bit) & (_Uint_type{1} << _Dropped_bits); + + // This rounding technique is dedicated to the memory of Peppermint. =^..^= + _Adjusted_mantissa += _Should_round; + } + + // * Print the leading hexit, then mask it away. + { + const uint32_t _Nibble = static_cast<uint32_t>(_Adjusted_mantissa >> _Adjusted_explicit_bits); + _LIBCPP_ASSERT(_Nibble < 3, ""); + const char _Leading_hexit = static_cast<char>('0' + _Nibble); + + *_First++ = _Leading_hexit; + + constexpr _Uint_type _Mask = (_Uint_type{1} << _Adjusted_explicit_bits) - 1; + _Adjusted_mantissa &= _Mask; + } + + // * Print the decimal point and trailing hexits. + + // C11 7.21.6.1 "The fprintf function"/8: + // "if the precision is zero and the # flag is not specified, no decimal-point character appears." + if (_Precision > 0) { + *_First++ = '.'; + + int32_t _Number_of_bits_remaining = _Adjusted_explicit_bits; // 24 for float, 52 for double + + for (;;) { + _LIBCPP_ASSERT(_Number_of_bits_remaining >= 4, ""); + _LIBCPP_ASSERT(_Number_of_bits_remaining % 4 == 0, ""); + _Number_of_bits_remaining -= 4; + + const uint32_t _Nibble = static_cast<uint32_t>(_Adjusted_mantissa >> _Number_of_bits_remaining); + _LIBCPP_ASSERT(_Nibble < 16, ""); + const char _Hexit = __itoa::_Charconv_digits[_Nibble]; + + *_First++ = _Hexit; + + // _Precision is the number of hexits that still need to be printed. + --_Precision; + if (_Precision == 0) { + break; // We're completely done with this phase. + } + // Otherwise, we need to keep printing hexits. + + if (_Number_of_bits_remaining == 0) { + // We've finished printing _Adjusted_mantissa, so all remaining hexits are '0'. + _VSTD::memset(_First, '0', static_cast<size_t>(_Precision)); + _First += _Precision; + break; + } + + // Mask away the hexit that we just printed, then keep looping. + // (We skip this when breaking out of the loop above, because _Adjusted_mantissa isn't used later.) + const _Uint_type _Mask = (_Uint_type{1} << _Number_of_bits_remaining) - 1; + _Adjusted_mantissa &= _Mask; + } + } + + // * Print the exponent. + + // C11 7.21.6.1 "The fprintf function"/8: "The exponent always contains at least one digit, and only as many more + // digits as necessary to represent the decimal exponent of 2." + + // Performance note: We should take advantage of the known ranges of possible exponents. + + *_First++ = 'p'; + *_First++ = _Sign_character; + + // We've already printed '-' if necessary, so uint32_t _Absolute_exponent avoids testing that again. + return _VSTD::to_chars(_First, _Last, _Absolute_exponent); +} + +template <class _Floating> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI +to_chars_result _Floating_to_chars_hex_shortest( + char* _First, char* const _Last, const _Floating _Value) noexcept { + + // This prints "1.728p+0" instead of "2.e5p-1". + // This prints "0.000002p-126" instead of "1p-149" for float. + // This prints "0.0000000000001p-1022" instead of "1p-1074" for double. + // This prioritizes being consistent with printf's de facto behavior (and hex-precision's behavior) + // over minimizing the number of characters printed. + + using _Traits = _Floating_type_traits<_Floating>; + using _Uint_type = typename _Traits::_Uint_type; + + const _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value); + + if (_Uint_value == 0) { // zero detected; write "0p+0" and return + // C11 7.21.6.1 "The fprintf function"/8: "If the value is zero, the exponent is zero." + // Special-casing zero is necessary because of the exponent. + const char* const _Str = "0p+0"; + const size_t _Len = 4; + + if (_Last - _First < static_cast<ptrdiff_t>(_Len)) { + return {_Last, errc::value_too_large}; + } + + _VSTD::memcpy(_First, _Str, _Len); + + return {_First + _Len, errc{}}; + } + + const _Uint_type _Ieee_mantissa = _Uint_value & _Traits::_Denormal_mantissa_mask; + const int32_t _Ieee_exponent = static_cast<int32_t>(_Uint_value >> _Traits::_Exponent_shift); + + char _Leading_hexit; // implicit bit + int32_t _Unbiased_exponent; + + if (_Ieee_exponent == 0) { // subnormal + _Leading_hexit = '0'; + _Unbiased_exponent = 1 - _Traits::_Exponent_bias; + } else { // normal + _Leading_hexit = '1'; + _Unbiased_exponent = _Ieee_exponent - _Traits::_Exponent_bias; + } + + // Performance note: Consider avoiding per-character bounds checking when there's plenty of space. + + if (_First == _Last) { + return {_Last, errc::value_too_large}; + } + + *_First++ = _Leading_hexit; + + if (_Ieee_mantissa == 0) { + // The fraction bits are all 0. Trim them away, including the decimal point. + } else { + if (_First == _Last) { + return {_Last, errc::value_too_large}; + } + + *_First++ = '.'; + + // The hexits after the decimal point correspond to the explicitly stored fraction bits. + // float explicitly stores 23 fraction bits. 23 / 4 == 5.75, so we'll print at most 6 hexits. + // double explicitly stores 52 fraction bits. 52 / 4 == 13, so we'll print at most 13 hexits. + _Uint_type _Adjusted_mantissa; + int32_t _Number_of_bits_remaining; + + if constexpr (_IsSame<_Floating, float>::value) { + _Adjusted_mantissa = _Ieee_mantissa << 1; // align to hexit boundary (23 isn't divisible by 4) + _Number_of_bits_remaining = 24; // 23 fraction bits + 1 alignment bit + } else { + _Adjusted_mantissa = _Ieee_mantissa; // already aligned (52 is divisible by 4) + _Number_of_bits_remaining = 52; // 52 fraction bits + } + + // do-while: The condition _Adjusted_mantissa != 0 is initially true - we have nonzero fraction bits and we've + // printed the decimal point. Each iteration, we print a hexit, mask it away, and keep looping if we still have + // nonzero fraction bits. If there would be trailing '0' hexits, this trims them. If there wouldn't be trailing + // '0' hexits, the same condition works (as we print the final hexit and mask it away); we don't need to test + // _Number_of_bits_remaining. + do { + _LIBCPP_ASSERT(_Number_of_bits_remaining >= 4, ""); + _LIBCPP_ASSERT(_Number_of_bits_remaining % 4 == 0, ""); + _Number_of_bits_remaining -= 4; + + const uint32_t _Nibble = static_cast<uint32_t>(_Adjusted_mantissa >> _Number_of_bits_remaining); + _LIBCPP_ASSERT(_Nibble < 16, ""); + const char _Hexit = __itoa::_Charconv_digits[_Nibble]; + + if (_First == _Last) { + return {_Last, errc::value_too_large}; + } + + *_First++ = _Hexit; + + const _Uint_type _Mask = (_Uint_type{1} << _Number_of_bits_remaining) - 1; + _Adjusted_mantissa &= _Mask; + + } while (_Adjusted_mantissa != 0); + } + + // C11 7.21.6.1 "The fprintf function"/8: "The exponent always contains at least one digit, and only as many more + // digits as necessary to represent the decimal exponent of 2." + + // Performance note: We should take advantage of the known ranges of possible exponents. + + // float: _Unbiased_exponent is within [-126, 127]. + // double: _Unbiased_exponent is within [-1022, 1023]. + + if (_Last - _First < 2) { + return {_Last, errc::value_too_large}; + } + + *_First++ = 'p'; + + if (_Unbiased_exponent < 0) { + *_First++ = '-'; + _Unbiased_exponent = -_Unbiased_exponent; + } else { + *_First++ = '+'; + } + + // We've already printed '-' if necessary, so static_cast<uint32_t> avoids testing that again. + return _VSTD::to_chars(_First, _Last, static_cast<uint32_t>(_Unbiased_exponent)); +} + +// For general precision, we can use lookup tables to avoid performing trial formatting. + +// For a simple example, imagine counting the number of digits D in an integer, and needing to know +// whether D is less than 3, equal to 3/4/5/6, or greater than 6. We could use a lookup table: +// D | Largest integer with D digits +// 2 | 99 +// 3 | 999 +// 4 | 9'999 +// 5 | 99'999 +// 6 | 999'999 +// 7 | table end +// Looking up an integer in this table with lower_bound() will work: +// * Too-small integers, like 7, 70, and 99, will cause lower_bound() to return the D == 2 row. (If all we care +// about is whether D is less than 3, then it's okay to smash the D == 1 and D == 2 cases together.) +// * Integers in [100, 999] will cause lower_bound() to return the D == 3 row, and so forth. +// * Too-large integers, like 1'000'000 and above, will cause lower_bound() to return the end of the table. If we +// compute D from that index, this will be considered D == 7, which will activate any "greater than 6" logic. + +// Floating-point is slightly more complicated. + +// The ordinary lookup tables are for X within [-5, 38] for float, and [-5, 308] for double. +// (-5 absorbs too-negative exponents, outside the P > X >= -4 criterion. 38 and 308 are the maximum exponents.) +// Due to the P > X condition, we can use a subset of the table for X within [-5, P - 1], suitably clamped. + +// When P is small, rounding can affect X. For example: +// For P == 1, the largest double with X == 0 is: 9.4999999999999982236431605997495353221893310546875 +// For P == 2, the largest double with X == 0 is: 9.949999999999999289457264239899814128875732421875 +// For P == 3, the largest double with X == 0 is: 9.9949999999999992184029906638897955417633056640625 + +// Exponent adjustment is a concern for P within [1, 7] for float, and [1, 15] for double (determined via +// brute force). While larger values of P still perform rounding, they can't trigger exponent adjustment. +// This is because only values with repeated '9' digits can undergo exponent adjustment during rounding, +// and floating-point granularity limits the number of consecutive '9' digits that can appear. + +// So, we need special lookup tables for small values of P. +// These tables have varying lengths due to the P > X >= -4 criterion. For example: +// For P == 1, need table entries for X: -5, -4, -3, -2, -1, 0 +// For P == 2, need table entries for X: -5, -4, -3, -2, -1, 0, 1 +// For P == 3, need table entries for X: -5, -4, -3, -2, -1, 0, 1, 2 +// For P == 4, need table entries for X: -5, -4, -3, -2, -1, 0, 1, 2, 3 + +// We can concatenate these tables for compact storage, using triangular numbers to access them. +// The table for P begins at index (P - 1) * (P + 10) / 2 with length P + 5. + +// For both the ordinary and special lookup tables, after an index I is returned by lower_bound(), X is I - 5. + +// We need to special-case the floating-point value 0.0, which is considered to have X == 0. +// Otherwise, the lookup tables would consider it to have a highly negative X. + +// Finally, because we're working with positive floating-point values, +// representation comparisons behave identically to floating-point comparisons. + +// The following code generated the lookup tables for the scientific exponent X. Don't remove this code. +#if 0 +// cl /EHsc /nologo /W4 /MT /O2 /std:c++17 generate_tables.cpp && generate_tables + +#include <algorithm> +#include <assert.h> +#include <charconv> +#include <cmath> +#include <limits> +#include <map> +#include <stdint.h> +#include <stdio.h> +#include <system_error> +#include <type_traits> +#include <vector> +using namespace std; + +template <typename UInt, typename Pred> +[[nodiscard]] UInt uint_partition_point(UInt first, const UInt last, Pred pred) { + // Find the beginning of the false partition in [first, last). + // [first, last) is partitioned when all of the true values occur before all of the false values. + + static_assert(is_unsigned_v<UInt>); + assert(first <= last); + + for (UInt n = last - first; n > 0;) { + const UInt n2 = n / 2; + const UInt mid = first + n2; + + if (pred(mid)) { + first = mid + 1; + n = n - n2 - 1; + } else { + n = n2; + } + } + + return first; +} + +template <typename Floating> +[[nodiscard]] int scientific_exponent_X(const int P, const Floating flt) { + char buf[400]; // more than enough + + // C11 7.21.6.1 "The fprintf function"/8 performs trial formatting with scientific precision P - 1. + const auto to_result = to_chars(buf, end(buf), flt, chars_format::scientific, P - 1); + assert(to_result.ec == errc{}); + + const char* exp_ptr = find(buf, to_result.ptr, 'e'); + assert(exp_ptr != to_result.ptr); + + ++exp_ptr; // advance past 'e' + + if (*exp_ptr == '+') { + ++exp_ptr; // advance past '+' which from_chars() won't parse + } + + int X; + const auto from_result = from_chars(exp_ptr, to_result.ptr, X); + assert(from_result.ec == errc{}); + return X; +} + +template <typename UInt> +void print_table(const vector<UInt>& v, const char* const name) { + constexpr const char* UIntName = _IsSame<UInt, uint32_t>::value ? "uint32_t" : "uint64_t"; + + printf("static constexpr %s %s[%zu] = {\n", UIntName, name, v.size()); + + for (const auto& val : v) { + if constexpr (_IsSame<UInt, uint32_t>::value) { + printf("0x%08Xu,\n", val); + } else { + printf("0x%016llXu,\n", val); + } + } + + printf("};\n"); +} + +enum class Mode { Tables, Tests }; + +template <typename Floating> +void generate_tables(const Mode mode) { + using Limits = numeric_limits<Floating>; + using UInt = conditional_t<_IsSame<Floating, float>::value, uint32_t, uint64_t>; + + map<int, map<int, UInt>> P_X_LargestValWithX; + + constexpr int MaxP = Limits::max_exponent10 + 1; // MaxP performs no rounding during trial formatting + + for (int P = 1; P <= MaxP; ++P) { + for (int X = -5; X < P; ++X) { + constexpr Floating first = static_cast<Floating>(9e-5); // well below 9.5e-5, otherwise arbitrary + constexpr Floating last = Limits::infinity(); // one bit above Limits::max() + + const UInt val_beyond_X = uint_partition_point(reinterpret_cast<const UInt&>(first), + reinterpret_cast<const UInt&>(last), + [P, X](const UInt u) { return scientific_exponent_X(P, reinterpret_cast<const Floating&>(u)) <= X; }); + + P_X_LargestValWithX[P][X] = val_beyond_X - 1; + } + } + + constexpr const char* FloatingName = _IsSame<Floating, float>::value ? "float" : "double"; + + constexpr int MaxSpecialP = _IsSame<Floating, float>::value ? 7 : 15; // MaxSpecialP is affected by exponent adjustment + + if (mode == Mode::Tables) { + printf("template <>\n"); + printf("struct _General_precision_tables<%s> {\n", FloatingName); + + printf("static constexpr int _Max_special_P = %d;\n", MaxSpecialP); + + vector<UInt> special; + + for (int P = 1; P <= MaxSpecialP; ++P) { + for (int X = -5; X < P; ++X) { + const UInt val = P_X_LargestValWithX[P][X]; + special.push_back(val); + } + } + + print_table(special, "_Special_X_table"); + + for (int P = MaxSpecialP + 1; P < MaxP; ++P) { + for (int X = -5; X < P; ++X) { + const UInt val = P_X_LargestValWithX[P][X]; + assert(val == P_X_LargestValWithX[MaxP][X]); + } + } + + printf("static constexpr int _Max_P = %d;\n", MaxP); + + vector<UInt> ordinary; + + for (int X = -5; X < MaxP; ++X) { + const UInt val = P_X_LargestValWithX[MaxP][X]; + ordinary.push_back(val); + } + + print_table(ordinary, "_Ordinary_X_table"); + + printf("};\n"); + } else { + printf("==========\n"); + printf("Test cases for %s:\n", FloatingName); + + constexpr int Hexits = _IsSame<Floating, float>::value ? 6 : 13; + constexpr const char* Suffix = _IsSame<Floating, float>::value ? "f" : ""; + + for (int P = 1; P <= MaxP; ++P) { + for (int X = -5; X < P; ++X) { + if (P <= MaxSpecialP || P == 25 || P == MaxP || X == P - 1) { + const UInt val1 = P_X_LargestValWithX[P][X]; + const Floating f1 = reinterpret_cast<const Floating&>(val1); + const UInt val2 = val1 + 1; + const Floating f2 = reinterpret_cast<const Floating&>(val2); + + printf("{%.*a%s, chars_format::general, %d, \"%.*g\"},\n", Hexits, f1, Suffix, P, P, f1); + if (isfinite(f2)) { + printf("{%.*a%s, chars_format::general, %d, \"%.*g\"},\n", Hexits, f2, Suffix, P, P, f2); + } + } + } + } + } +} + +int main() { + printf("template <class _Floating>\n"); + printf("struct _General_precision_tables;\n"); + generate_tables<float>(Mode::Tables); + generate_tables<double>(Mode::Tables); + generate_tables<float>(Mode::Tests); + generate_tables<double>(Mode::Tests); +} +#endif // 0 + +template <class _Floating> +struct _General_precision_tables; + +template <> +struct _General_precision_tables<float> { + static constexpr int _Max_special_P = 7; + + static constexpr uint32_t _Special_X_table[63] = {0x38C73ABCu, 0x3A79096Bu, 0x3C1BA5E3u, 0x3DC28F5Cu, 0x3F733333u, + 0x4117FFFFu, 0x38D0AAA7u, 0x3A826AA8u, 0x3C230553u, 0x3DCBC6A7u, 0x3F7EB851u, 0x411F3333u, 0x42C6FFFFu, + 0x38D19C3Fu, 0x3A8301A7u, 0x3C23C211u, 0x3DCCB295u, 0x3F7FDF3Bu, 0x411FEB85u, 0x42C7E666u, 0x4479DFFFu, + 0x38D1B468u, 0x3A8310C1u, 0x3C23D4F1u, 0x3DCCCA2Du, 0x3F7FFCB9u, 0x411FFDF3u, 0x42C7FD70u, 0x4479FCCCu, + 0x461C3DFFu, 0x38D1B6D2u, 0x3A831243u, 0x3C23D6D4u, 0x3DCCCC89u, 0x3F7FFFACu, 0x411FFFCBu, 0x42C7FFBEu, + 0x4479FFAEu, 0x461C3FCCu, 0x47C34FBFu, 0x38D1B710u, 0x3A83126Au, 0x3C23D704u, 0x3DCCCCC6u, 0x3F7FFFF7u, + 0x411FFFFAu, 0x42C7FFF9u, 0x4479FFF7u, 0x461C3FFAu, 0x47C34FF9u, 0x497423F7u, 0x38D1B716u, 0x3A83126Eu, + 0x3C23D709u, 0x3DCCCCCCu, 0x3F7FFFFFu, 0x411FFFFFu, 0x42C7FFFFu, 0x4479FFFFu, 0x461C3FFFu, 0x47C34FFFu, + 0x497423FFu, 0x4B18967Fu}; + + static constexpr int _Max_P = 39; + + static constexpr uint32_t _Ordinary_X_table[44] = {0x38D1B717u, 0x3A83126Eu, 0x3C23D70Au, 0x3DCCCCCCu, 0x3F7FFFFFu, + 0x411FFFFFu, 0x42C7FFFFu, 0x4479FFFFu, 0x461C3FFFu, 0x47C34FFFu, 0x497423FFu, 0x4B18967Fu, 0x4CBEBC1Fu, + 0x4E6E6B27u, 0x501502F8u, 0x51BA43B7u, 0x5368D4A5u, 0x551184E7u, 0x56B5E620u, 0x58635FA9u, 0x5A0E1BC9u, + 0x5BB1A2BCu, 0x5D5E0B6Bu, 0x5F0AC723u, 0x60AD78EBu, 0x6258D726u, 0x64078678u, 0x65A96816u, 0x6753C21Bu, + 0x69045951u, 0x6AA56FA5u, 0x6C4ECB8Fu, 0x6E013F39u, 0x6FA18F07u, 0x7149F2C9u, 0x72FC6F7Cu, 0x749DC5ADu, + 0x76453719u, 0x77F684DFu, 0x799A130Bu, 0x7B4097CEu, 0x7CF0BDC2u, 0x7E967699u, 0x7F7FFFFFu}; +}; + +template <> +struct _General_precision_tables<double> { + static constexpr int _Max_special_P = 15; + + static constexpr uint64_t _Special_X_table[195] = {0x3F18E757928E0C9Du, 0x3F4F212D77318FC5u, 0x3F8374BC6A7EF9DBu, + 0x3FB851EB851EB851u, 0x3FEE666666666666u, 0x4022FFFFFFFFFFFFu, 0x3F1A1554FBDAD751u, 0x3F504D551D68C692u, + 0x3F8460AA64C2F837u, 0x3FB978D4FDF3B645u, 0x3FEFD70A3D70A3D7u, 0x4023E66666666666u, 0x4058DFFFFFFFFFFFu, + 0x3F1A3387ECC8EB96u, 0x3F506034F3FD933Eu, 0x3F84784230FCF80Du, 0x3FB99652BD3C3611u, 0x3FEFFBE76C8B4395u, + 0x4023FD70A3D70A3Du, 0x4058FCCCCCCCCCCCu, 0x408F3BFFFFFFFFFFu, 0x3F1A368D04E0BA6Au, 0x3F506218230C7482u, + 0x3F847A9E2BCF91A3u, 0x3FB99945B6C3760Bu, 0x3FEFFF972474538Eu, 0x4023FFBE76C8B439u, 0x4058FFAE147AE147u, + 0x408F3F9999999999u, 0x40C387BFFFFFFFFFu, 0x3F1A36DA54164F19u, 0x3F506248748DF16Fu, 0x3F847ADA91B16DCBu, + 0x3FB99991361DC93Eu, 0x3FEFFFF583A53B8Eu, 0x4023FFF972474538u, 0x4058FFF7CED91687u, 0x408F3FF5C28F5C28u, + 0x40C387F999999999u, 0x40F869F7FFFFFFFFu, 0x3F1A36E20F35445Du, 0x3F50624D49814ABAu, 0x3F847AE09BE19D69u, + 0x3FB99998C2DA04C3u, 0x3FEFFFFEF39085F4u, 0x4023FFFF583A53B8u, 0x4058FFFF2E48E8A7u, 0x408F3FFEF9DB22D0u, + 0x40C387FF5C28F5C2u, 0x40F869FF33333333u, 0x412E847EFFFFFFFFu, 0x3F1A36E2D51EC34Bu, 0x3F50624DC5333A0Eu, + 0x3F847AE136800892u, 0x3FB9999984200AB7u, 0x3FEFFFFFE5280D65u, 0x4023FFFFEF39085Fu, 0x4058FFFFEB074A77u, + 0x408F3FFFE5C91D14u, 0x40C387FFEF9DB22Du, 0x40F869FFEB851EB8u, 0x412E847FE6666666u, 0x416312CFEFFFFFFFu, + 0x3F1A36E2E8E94FFCu, 0x3F50624DD191D1FDu, 0x3F847AE145F6467Du, 0x3FB999999773D81Cu, 0x3FEFFFFFFD50CE23u, + 0x4023FFFFFE5280D6u, 0x4058FFFFFDE7210Bu, 0x408F3FFFFD60E94Eu, 0x40C387FFFE5C91D1u, 0x40F869FFFDF3B645u, + 0x412E847FFD70A3D7u, 0x416312CFFE666666u, 0x4197D783FDFFFFFFu, 0x3F1A36E2EAE3F7A7u, 0x3F50624DD2CE7AC8u, + 0x3F847AE14782197Bu, 0x3FB9999999629FD9u, 0x3FEFFFFFFFBB47D0u, 0x4023FFFFFFD50CE2u, 0x4058FFFFFFCA501Au, + 0x408F3FFFFFBCE421u, 0x40C387FFFFD60E94u, 0x40F869FFFFCB923Au, 0x412E847FFFBE76C8u, 0x416312CFFFD70A3Du, + 0x4197D783FFCCCCCCu, 0x41CDCD64FFBFFFFFu, 0x3F1A36E2EB16A205u, 0x3F50624DD2EE2543u, 0x3F847AE147A9AE94u, + 0x3FB9999999941A39u, 0x3FEFFFFFFFF920C8u, 0x4023FFFFFFFBB47Du, 0x4058FFFFFFFAA19Cu, 0x408F3FFFFFF94A03u, + 0x40C387FFFFFBCE42u, 0x40F869FFFFFAC1D2u, 0x412E847FFFF97247u, 0x416312CFFFFBE76Cu, 0x4197D783FFFAE147u, + 0x41CDCD64FFF99999u, 0x4202A05F1FFBFFFFu, 0x3F1A36E2EB1BB30Fu, 0x3F50624DD2F14FE9u, 0x3F847AE147ADA3E3u, + 0x3FB9999999990CDCu, 0x3FEFFFFFFFFF5014u, 0x4023FFFFFFFF920Cu, 0x4058FFFFFFFF768Fu, 0x408F3FFFFFFF5433u, + 0x40C387FFFFFF94A0u, 0x40F869FFFFFF79C8u, 0x412E847FFFFF583Au, 0x416312CFFFFF9724u, 0x4197D783FFFF7CEDu, + 0x41CDCD64FFFF5C28u, 0x4202A05F1FFF9999u, 0x42374876E7FF7FFFu, 0x3F1A36E2EB1C34C3u, 0x3F50624DD2F1A0FAu, + 0x3F847AE147AE0938u, 0x3FB9999999998B86u, 0x3FEFFFFFFFFFEE68u, 0x4023FFFFFFFFF501u, 0x4058FFFFFFFFF241u, + 0x408F3FFFFFFFEED1u, 0x40C387FFFFFFF543u, 0x40F869FFFFFFF294u, 0x412E847FFFFFEF39u, 0x416312CFFFFFF583u, + 0x4197D783FFFFF2E4u, 0x41CDCD64FFFFEF9Du, 0x4202A05F1FFFF5C2u, 0x42374876E7FFF333u, 0x426D1A94A1FFEFFFu, + 0x3F1A36E2EB1C41BBu, 0x3F50624DD2F1A915u, 0x3F847AE147AE135Au, 0x3FB9999999999831u, 0x3FEFFFFFFFFFFE3Du, + 0x4023FFFFFFFFFEE6u, 0x4058FFFFFFFFFEA0u, 0x408F3FFFFFFFFE48u, 0x40C387FFFFFFFEEDu, 0x40F869FFFFFFFEA8u, + 0x412E847FFFFFFE52u, 0x416312CFFFFFFEF3u, 0x4197D783FFFFFEB0u, 0x41CDCD64FFFFFE5Cu, 0x4202A05F1FFFFEF9u, + 0x42374876E7FFFEB8u, 0x426D1A94A1FFFE66u, 0x42A2309CE53FFEFFu, 0x3F1A36E2EB1C4307u, 0x3F50624DD2F1A9E4u, + 0x3F847AE147AE145Eu, 0x3FB9999999999975u, 0x3FEFFFFFFFFFFFD2u, 0x4023FFFFFFFFFFE3u, 0x4058FFFFFFFFFFDCu, + 0x408F3FFFFFFFFFD4u, 0x40C387FFFFFFFFE4u, 0x40F869FFFFFFFFDDu, 0x412E847FFFFFFFD5u, 0x416312CFFFFFFFE5u, + 0x4197D783FFFFFFDEu, 0x41CDCD64FFFFFFD6u, 0x4202A05F1FFFFFE5u, 0x42374876E7FFFFDFu, 0x426D1A94A1FFFFD7u, + 0x42A2309CE53FFFE6u, 0x42D6BCC41E8FFFDFu, 0x3F1A36E2EB1C4328u, 0x3F50624DD2F1A9F9u, 0x3F847AE147AE1477u, + 0x3FB9999999999995u, 0x3FEFFFFFFFFFFFFBu, 0x4023FFFFFFFFFFFDu, 0x4058FFFFFFFFFFFCu, 0x408F3FFFFFFFFFFBu, + 0x40C387FFFFFFFFFDu, 0x40F869FFFFFFFFFCu, 0x412E847FFFFFFFFBu, 0x416312CFFFFFFFFDu, 0x4197D783FFFFFFFCu, + 0x41CDCD64FFFFFFFBu, 0x4202A05F1FFFFFFDu, 0x42374876E7FFFFFCu, 0x426D1A94A1FFFFFBu, 0x42A2309CE53FFFFDu, + 0x42D6BCC41E8FFFFCu, 0x430C6BF52633FFFBu}; + + static constexpr int _Max_P = 309; + + static constexpr uint64_t _Ordinary_X_table[314] = {0x3F1A36E2EB1C432Cu, 0x3F50624DD2F1A9FBu, 0x3F847AE147AE147Au, + 0x3FB9999999999999u, 0x3FEFFFFFFFFFFFFFu, 0x4023FFFFFFFFFFFFu, 0x4058FFFFFFFFFFFFu, 0x408F3FFFFFFFFFFFu, + 0x40C387FFFFFFFFFFu, 0x40F869FFFFFFFFFFu, 0x412E847FFFFFFFFFu, 0x416312CFFFFFFFFFu, 0x4197D783FFFFFFFFu, + 0x41CDCD64FFFFFFFFu, 0x4202A05F1FFFFFFFu, 0x42374876E7FFFFFFu, 0x426D1A94A1FFFFFFu, 0x42A2309CE53FFFFFu, + 0x42D6BCC41E8FFFFFu, 0x430C6BF52633FFFFu, 0x4341C37937E07FFFu, 0x4376345785D89FFFu, 0x43ABC16D674EC7FFu, + 0x43E158E460913CFFu, 0x4415AF1D78B58C3Fu, 0x444B1AE4D6E2EF4Fu, 0x4480F0CF064DD591u, 0x44B52D02C7E14AF6u, + 0x44EA784379D99DB4u, 0x45208B2A2C280290u, 0x4554ADF4B7320334u, 0x4589D971E4FE8401u, 0x45C027E72F1F1281u, + 0x45F431E0FAE6D721u, 0x46293E5939A08CE9u, 0x465F8DEF8808B024u, 0x4693B8B5B5056E16u, 0x46C8A6E32246C99Cu, + 0x46FED09BEAD87C03u, 0x4733426172C74D82u, 0x476812F9CF7920E2u, 0x479E17B84357691Bu, 0x47D2CED32A16A1B1u, + 0x48078287F49C4A1Du, 0x483D6329F1C35CA4u, 0x48725DFA371A19E6u, 0x48A6F578C4E0A060u, 0x48DCB2D6F618C878u, + 0x4911EFC659CF7D4Bu, 0x49466BB7F0435C9Eu, 0x497C06A5EC5433C6u, 0x49B18427B3B4A05Bu, 0x49E5E531A0A1C872u, + 0x4A1B5E7E08CA3A8Fu, 0x4A511B0EC57E6499u, 0x4A8561D276DDFDC0u, 0x4ABABA4714957D30u, 0x4AF0B46C6CDD6E3Eu, + 0x4B24E1878814C9CDu, 0x4B5A19E96A19FC40u, 0x4B905031E2503DA8u, 0x4BC4643E5AE44D12u, 0x4BF97D4DF19D6057u, + 0x4C2FDCA16E04B86Du, 0x4C63E9E4E4C2F344u, 0x4C98E45E1DF3B015u, 0x4CCF1D75A5709C1Au, 0x4D03726987666190u, + 0x4D384F03E93FF9F4u, 0x4D6E62C4E38FF872u, 0x4DA2FDBB0E39FB47u, 0x4DD7BD29D1C87A19u, 0x4E0DAC74463A989Fu, + 0x4E428BC8ABE49F63u, 0x4E772EBAD6DDC73Cu, 0x4EACFA698C95390Bu, 0x4EE21C81F7DD43A7u, 0x4F16A3A275D49491u, + 0x4F4C4C8B1349B9B5u, 0x4F81AFD6EC0E1411u, 0x4FB61BCCA7119915u, 0x4FEBA2BFD0D5FF5Bu, 0x502145B7E285BF98u, + 0x50559725DB272F7Fu, 0x508AFCEF51F0FB5Eu, 0x50C0DE1593369D1Bu, 0x50F5159AF8044462u, 0x512A5B01B605557Au, + 0x516078E111C3556Cu, 0x5194971956342AC7u, 0x51C9BCDFABC13579u, 0x5200160BCB58C16Cu, 0x52341B8EBE2EF1C7u, + 0x526922726DBAAE39u, 0x529F6B0F092959C7u, 0x52D3A2E965B9D81Cu, 0x53088BA3BF284E23u, 0x533EAE8CAEF261ACu, + 0x53732D17ED577D0Bu, 0x53A7F85DE8AD5C4Eu, 0x53DDF67562D8B362u, 0x5412BA095DC7701Du, 0x5447688BB5394C25u, + 0x547D42AEA2879F2Eu, 0x54B249AD2594C37Cu, 0x54E6DC186EF9F45Cu, 0x551C931E8AB87173u, 0x5551DBF316B346E7u, + 0x558652EFDC6018A1u, 0x55BBE7ABD3781ECAu, 0x55F170CB642B133Eu, 0x5625CCFE3D35D80Eu, 0x565B403DCC834E11u, + 0x569108269FD210CBu, 0x56C54A3047C694FDu, 0x56FA9CBC59B83A3Du, 0x5730A1F5B8132466u, 0x5764CA732617ED7Fu, + 0x5799FD0FEF9DE8DFu, 0x57D03E29F5C2B18Bu, 0x58044DB473335DEEu, 0x583961219000356Au, 0x586FB969F40042C5u, + 0x58A3D3E2388029BBu, 0x58D8C8DAC6A0342Au, 0x590EFB1178484134u, 0x59435CEAEB2D28C0u, 0x59783425A5F872F1u, + 0x59AE412F0F768FADu, 0x59E2E8BD69AA19CCu, 0x5A17A2ECC414A03Fu, 0x5A4D8BA7F519C84Fu, 0x5A827748F9301D31u, + 0x5AB7151B377C247Eu, 0x5AECDA62055B2D9Du, 0x5B22087D4358FC82u, 0x5B568A9C942F3BA3u, 0x5B8C2D43B93B0A8Bu, + 0x5BC19C4A53C4E697u, 0x5BF6035CE8B6203Du, 0x5C2B843422E3A84Cu, 0x5C6132A095CE492Fu, 0x5C957F48BB41DB7Bu, + 0x5CCADF1AEA12525Au, 0x5D00CB70D24B7378u, 0x5D34FE4D06DE5056u, 0x5D6A3DE04895E46Cu, 0x5DA066AC2D5DAEC3u, + 0x5DD4805738B51A74u, 0x5E09A06D06E26112u, 0x5E400444244D7CABu, 0x5E7405552D60DBD6u, 0x5EA906AA78B912CBu, + 0x5EDF485516E7577Eu, 0x5F138D352E5096AFu, 0x5F48708279E4BC5Au, 0x5F7E8CA3185DEB71u, 0x5FB317E5EF3AB327u, + 0x5FE7DDDF6B095FF0u, 0x601DD55745CBB7ECu, 0x6052A5568B9F52F4u, 0x60874EAC2E8727B1u, 0x60BD22573A28F19Du, + 0x60F2357684599702u, 0x6126C2D4256FFCC2u, 0x615C73892ECBFBF3u, 0x6191C835BD3F7D78u, 0x61C63A432C8F5CD6u, + 0x61FBC8D3F7B3340Bu, 0x62315D847AD00087u, 0x6265B4E5998400A9u, 0x629B221EFFE500D3u, 0x62D0F5535FEF2084u, + 0x630532A837EAE8A5u, 0x633A7F5245E5A2CEu, 0x63708F936BAF85C1u, 0x63A4B378469B6731u, 0x63D9E056584240FDu, + 0x64102C35F729689Eu, 0x6444374374F3C2C6u, 0x647945145230B377u, 0x64AF965966BCE055u, 0x64E3BDF7E0360C35u, + 0x6518AD75D8438F43u, 0x654ED8D34E547313u, 0x6583478410F4C7ECu, 0x65B819651531F9E7u, 0x65EE1FBE5A7E7861u, + 0x6622D3D6F88F0B3Cu, 0x665788CCB6B2CE0Cu, 0x668D6AFFE45F818Fu, 0x66C262DFEEBBB0F9u, 0x66F6FB97EA6A9D37u, + 0x672CBA7DE5054485u, 0x6761F48EAF234AD3u, 0x679671B25AEC1D88u, 0x67CC0E1EF1A724EAu, 0x680188D357087712u, + 0x6835EB082CCA94D7u, 0x686B65CA37FD3A0Du, 0x68A11F9E62FE4448u, 0x68D56785FBBDD55Au, 0x690AC1677AAD4AB0u, + 0x6940B8E0ACAC4EAEu, 0x6974E718D7D7625Au, 0x69AA20DF0DCD3AF0u, 0x69E0548B68A044D6u, 0x6A1469AE42C8560Cu, + 0x6A498419D37A6B8Fu, 0x6A7FE52048590672u, 0x6AB3EF342D37A407u, 0x6AE8EB0138858D09u, 0x6B1F25C186A6F04Cu, + 0x6B537798F428562Fu, 0x6B88557F31326BBBu, 0x6BBE6ADEFD7F06AAu, 0x6BF302CB5E6F642Au, 0x6C27C37E360B3D35u, + 0x6C5DB45DC38E0C82u, 0x6C9290BA9A38C7D1u, 0x6CC734E940C6F9C5u, 0x6CFD022390F8B837u, 0x6D3221563A9B7322u, + 0x6D66A9ABC9424FEBu, 0x6D9C5416BB92E3E6u, 0x6DD1B48E353BCE6Fu, 0x6E0621B1C28AC20Bu, 0x6E3BAA1E332D728Eu, + 0x6E714A52DFFC6799u, 0x6EA59CE797FB817Fu, 0x6EDB04217DFA61DFu, 0x6F10E294EEBC7D2Bu, 0x6F451B3A2A6B9C76u, + 0x6F7A6208B5068394u, 0x6FB07D457124123Cu, 0x6FE49C96CD6D16CBu, 0x7019C3BC80C85C7Eu, 0x70501A55D07D39CFu, + 0x708420EB449C8842u, 0x70B9292615C3AA53u, 0x70EF736F9B3494E8u, 0x7123A825C100DD11u, 0x7158922F31411455u, + 0x718EB6BAFD91596Bu, 0x71C33234DE7AD7E2u, 0x71F7FEC216198DDBu, 0x722DFE729B9FF152u, 0x7262BF07A143F6D3u, + 0x72976EC98994F488u, 0x72CD4A7BEBFA31AAu, 0x73024E8D737C5F0Au, 0x7336E230D05B76CDu, 0x736C9ABD04725480u, + 0x73A1E0B622C774D0u, 0x73D658E3AB795204u, 0x740BEF1C9657A685u, 0x74417571DDF6C813u, 0x7475D2CE55747A18u, + 0x74AB4781EAD1989Eu, 0x74E10CB132C2FF63u, 0x75154FDD7F73BF3Bu, 0x754AA3D4DF50AF0Au, 0x7580A6650B926D66u, + 0x75B4CFFE4E7708C0u, 0x75EA03FDE214CAF0u, 0x7620427EAD4CFED6u, 0x7654531E58A03E8Bu, 0x768967E5EEC84E2Eu, + 0x76BFC1DF6A7A61BAu, 0x76F3D92BA28C7D14u, 0x7728CF768B2F9C59u, 0x775F03542DFB8370u, 0x779362149CBD3226u, + 0x77C83A99C3EC7EAFu, 0x77FE494034E79E5Bu, 0x7832EDC82110C2F9u, 0x7867A93A2954F3B7u, 0x789D9388B3AA30A5u, + 0x78D27C35704A5E67u, 0x79071B42CC5CF601u, 0x793CE2137F743381u, 0x79720D4C2FA8A030u, 0x79A6909F3B92C83Du, + 0x79DC34C70A777A4Cu, 0x7A11A0FC668AAC6Fu, 0x7A46093B802D578Bu, 0x7A7B8B8A6038AD6Eu, 0x7AB137367C236C65u, + 0x7AE585041B2C477Eu, 0x7B1AE64521F7595Eu, 0x7B50CFEB353A97DAu, 0x7B8503E602893DD1u, 0x7BBA44DF832B8D45u, + 0x7BF06B0BB1FB384Bu, 0x7C2485CE9E7A065Eu, 0x7C59A742461887F6u, 0x7C9008896BCF54F9u, 0x7CC40AABC6C32A38u, + 0x7CF90D56B873F4C6u, 0x7D2F50AC6690F1F8u, 0x7D63926BC01A973Bu, 0x7D987706B0213D09u, 0x7DCE94C85C298C4Cu, + 0x7E031CFD3999F7AFu, 0x7E37E43C8800759Bu, 0x7E6DDD4BAA009302u, 0x7EA2AA4F4A405BE1u, 0x7ED754E31CD072D9u, + 0x7F0D2A1BE4048F90u, 0x7F423A516E82D9BAu, 0x7F76C8E5CA239028u, 0x7FAC7B1F3CAC7433u, 0x7FE1CCF385EBC89Fu, + 0x7FEFFFFFFFFFFFFFu}; +}; + +template <class _Floating> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI +to_chars_result _Floating_to_chars_general_precision( + char* _First, char* const _Last, const _Floating _Value, int _Precision) noexcept { + + using _Traits = _Floating_type_traits<_Floating>; + using _Uint_type = typename _Traits::_Uint_type; + + const _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value); + + if (_Uint_value == 0) { // zero detected; write "0" and return; _Precision is irrelevant due to zero-trimming + if (_First == _Last) { + return {_Last, errc::value_too_large}; + } + + *_First++ = '0'; + + return {_First, errc{}}; + } + + // C11 7.21.6.1 "The fprintf function"/5: + // "A negative precision argument is taken as if the precision were omitted." + // /8: "g,G [...] Let P equal the precision if nonzero, 6 if the precision is omitted, + // or 1 if the precision is zero." + + // Performance note: It's possible to rewrite this for branchless codegen, + // but profiling will be necessary to determine whether that's faster. + if (_Precision < 0) { + _Precision = 6; + } else if (_Precision == 0) { + _Precision = 1; + } else if (_Precision < 1'000'000) { + // _Precision is ok. + } else { + // Avoid integer overflow. + // Due to general notation's zero-trimming behavior, we can simply clamp _Precision. + // This is further clamped below. + _Precision = 1'000'000; + } + + // _Precision is now the Standard's P. + + // /8: "Then, if a conversion with style E would have an exponent of X: + // - if P > X >= -4, the conversion is with style f (or F) and precision P - (X + 1). + // - otherwise, the conversion is with style e (or E) and precision P - 1." + + // /8: "Finally, [...] any trailing zeros are removed from the fractional portion of the result + // and the decimal-point character is removed if there is no fractional portion remaining." + + using _Tables = _General_precision_tables<_Floating>; + + const _Uint_type* _Table_begin; + const _Uint_type* _Table_end; + + if (_Precision <= _Tables::_Max_special_P) { + _Table_begin = _Tables::_Special_X_table + (_Precision - 1) * (_Precision + 10) / 2; + _Table_end = _Table_begin + _Precision + 5; + } else { + _Table_begin = _Tables::_Ordinary_X_table; + _Table_end = _Table_begin + _VSTD::min(_Precision, _Tables::_Max_P) + 5; + } + + // Profiling indicates that linear search is faster than binary search for small tables. + // Performance note: lambda captures may have a small performance cost. + const _Uint_type* const _Table_lower_bound = [=] { + if constexpr (!_IsSame<_Floating, float>::value) { + if (_Precision > 155) { // threshold determined via profiling + return _VSTD::lower_bound(_Table_begin, _Table_end, _Uint_value, less{}); + } + } + + return _VSTD::find_if(_Table_begin, _Table_end, [=](const _Uint_type _Elem) { return _Uint_value <= _Elem; }); + }(); + + const ptrdiff_t _Table_index = _Table_lower_bound - _Table_begin; + const int _Scientific_exponent_X = static_cast<int>(_Table_index - 5); + const bool _Use_fixed_notation = _Precision > _Scientific_exponent_X && _Scientific_exponent_X >= -4; + + // Performance note: it might (or might not) be faster to modify Ryu Printf to perform zero-trimming. + // Such modifications would involve a fairly complicated state machine (notably, both '0' and '9' digits would + // need to be buffered, due to rounding), and that would have performance costs due to increased branching. + // Here, we're using a simpler approach: writing into a local buffer, manually zero-trimming, and then copying into + // the output range. The necessary buffer size is reasonably small, the zero-trimming logic is simple and fast, + // and the final copying is also fast. + + constexpr int _Max_output_length = + _IsSame<_Floating, float>::value ? 117 : 773; // cases: 0x1.fffffep-126f and 0x1.fffffffffffffp-1022 + constexpr int _Max_fixed_precision = + _IsSame<_Floating, float>::value ? 37 : 66; // cases: 0x1.fffffep-14f and 0x1.fffffffffffffp-14 + constexpr int _Max_scientific_precision = + _IsSame<_Floating, float>::value ? 111 : 766; // cases: 0x1.fffffep-126f and 0x1.fffffffffffffp-1022 + + // Note that _Max_output_length is determined by scientific notation and is more than enough for fixed notation. + // 0x1.fffffep+127f is 39 digits, plus 1 for '.', plus _Max_fixed_precision for '0' digits, equals 77. + // 0x1.fffffffffffffp+1023 is 309 digits, plus 1 for '.', plus _Max_fixed_precision for '0' digits, equals 376. + + char _Buffer[_Max_output_length]; + const char* const _Significand_first = _Buffer; // e.g. "1.234" + const char* _Significand_last = nullptr; + const char* _Exponent_first = nullptr; // e.g. "e-05" + const char* _Exponent_last = nullptr; + int _Effective_precision; // number of digits printed after the decimal point, before trimming + + // Write into the local buffer. + // Clamping _Effective_precision allows _Buffer to be as small as possible, and increases efficiency. + if (_Use_fixed_notation) { + _Effective_precision = _VSTD::min(_Precision - (_Scientific_exponent_X + 1), _Max_fixed_precision); + const to_chars_result _Buf_result = + _Floating_to_chars_fixed_precision(_Buffer, _VSTD::end(_Buffer), _Value, _Effective_precision); + _LIBCPP_ASSERT(_Buf_result.ec == errc{}, ""); + _Significand_last = _Buf_result.ptr; + } else { + _Effective_precision = _VSTD::min(_Precision - 1, _Max_scientific_precision); + const to_chars_result _Buf_result = + _Floating_to_chars_scientific_precision(_Buffer, _VSTD::end(_Buffer), _Value, _Effective_precision); + _LIBCPP_ASSERT(_Buf_result.ec == errc{}, ""); + _Significand_last = _VSTD::find(_Buffer, _Buf_result.ptr, 'e'); + _Exponent_first = _Significand_last; + _Exponent_last = _Buf_result.ptr; + } + + // If we printed a decimal point followed by digits, perform zero-trimming. + if (_Effective_precision > 0) { + while (_Significand_last[-1] == '0') { // will stop at '.' or a nonzero digit + --_Significand_last; + } + + if (_Significand_last[-1] == '.') { + --_Significand_last; + } + } + + // Copy the significand to the output range. + const ptrdiff_t _Significand_distance = _Significand_last - _Significand_first; + if (_Last - _First < _Significand_distance) { + return {_Last, errc::value_too_large}; + } + _VSTD::memcpy(_First, _Significand_first, static_cast<size_t>(_Significand_distance)); + _First += _Significand_distance; + + // Copy the exponent to the output range. + if (!_Use_fixed_notation) { + const ptrdiff_t _Exponent_distance = _Exponent_last - _Exponent_first; + if (_Last - _First < _Exponent_distance) { + return {_Last, errc::value_too_large}; + } + _VSTD::memcpy(_First, _Exponent_first, static_cast<size_t>(_Exponent_distance)); + _First += _Exponent_distance; + } + + return {_First, errc{}}; +} + +enum class _Floating_to_chars_overload { _Plain, _Format_only, _Format_precision }; + +template <_Floating_to_chars_overload _Overload, class _Floating> +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI +to_chars_result _Floating_to_chars( + char* _First, char* const _Last, _Floating _Value, const chars_format _Fmt, const int _Precision) noexcept { + + if constexpr (_Overload == _Floating_to_chars_overload::_Plain) { + _LIBCPP_ASSERT(_Fmt == chars_format{}, ""); // plain overload must pass chars_format{} internally + } else { + _LIBCPP_ASSERT(_Fmt == chars_format::general || _Fmt == chars_format::scientific || _Fmt == chars_format::fixed + || _Fmt == chars_format::hex, + "invalid format in to_chars()"); + } + + using _Traits = _Floating_type_traits<_Floating>; + using _Uint_type = typename _Traits::_Uint_type; + + _Uint_type _Uint_value = _VSTD::bit_cast<_Uint_type>(_Value); + + const bool _Was_negative = (_Uint_value & _Traits::_Shifted_sign_mask) != 0; + + if (_Was_negative) { // sign bit detected; write minus sign and clear sign bit + if (_First == _Last) { + return {_Last, errc::value_too_large}; + } + + *_First++ = '-'; + + _Uint_value &= ~_Traits::_Shifted_sign_mask; + _Value = _VSTD::bit_cast<_Floating>(_Uint_value); + } + + if ((_Uint_value & _Traits::_Shifted_exponent_mask) == _Traits::_Shifted_exponent_mask) { + // inf/nan detected; write appropriate string and return + const char* _Str; + size_t _Len; + + const _Uint_type _Mantissa = _Uint_value & _Traits::_Denormal_mantissa_mask; + + if (_Mantissa == 0) { + _Str = "inf"; + _Len = 3; + } else if (_Was_negative && _Mantissa == _Traits::_Special_nan_mantissa_mask) { + // When a NaN value has the sign bit set, the quiet bit set, and all other mantissa bits cleared, + // the UCRT interprets it to mean "indeterminate", and indicates this by printing "-nan(ind)". + _Str = "nan(ind)"; + _Len = 8; + } else if ((_Mantissa & _Traits::_Special_nan_mantissa_mask) != 0) { + _Str = "nan"; + _Len = 3; + } else { + _Str = "nan(snan)"; + _Len = 9; + } + + if (_Last - _First < static_cast<ptrdiff_t>(_Len)) { + return {_Last, errc::value_too_large}; + } + + _VSTD::memcpy(_First, _Str, _Len); + + return {_First + _Len, errc{}}; + } + + if constexpr (_Overload == _Floating_to_chars_overload::_Plain) { + return _Floating_to_chars_ryu(_First, _Last, _Value, chars_format{}); + } else if constexpr (_Overload == _Floating_to_chars_overload::_Format_only) { + if (_Fmt == chars_format::hex) { + return _Floating_to_chars_hex_shortest(_First, _Last, _Value); + } + + return _Floating_to_chars_ryu(_First, _Last, _Value, _Fmt); + } else if constexpr (_Overload == _Floating_to_chars_overload::_Format_precision) { + switch (_Fmt) { + case chars_format::scientific: + return _Floating_to_chars_scientific_precision(_First, _Last, _Value, _Precision); + case chars_format::fixed: + return _Floating_to_chars_fixed_precision(_First, _Last, _Value, _Precision); + case chars_format::general: + return _Floating_to_chars_general_precision(_First, _Last, _Value, _Precision); + case chars_format::hex: + default: // avoid MSVC warning C4715: not all control paths return a value + return _Floating_to_chars_hex_precision(_First, _Last, _Value, _Precision); + } + } +} + +// clang-format on + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_SRC_INCLUDE_TO_CHARS_FLOATING_POINT_H diff --git a/libcxx/src/ios.cpp b/libcxx/src/ios.cpp index a9bd1dc32397..56fbcca417aa 100644 --- a/libcxx/src/ios.cpp +++ b/libcxx/src/ios.cpp @@ -137,7 +137,7 @@ ios_base::getloc() const // xalloc #if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS) -atomic<int> ios_base::__xindex_ = ATOMIC_VAR_INIT(0); +atomic<int> ios_base::__xindex_{0}; #else int ios_base::__xindex_ = 0; #endif diff --git a/libcxx/src/iostream.cpp b/libcxx/src/iostream.cpp index 6070449621a0..d87bf7af84ba 100644 --- a/libcxx/src/iostream.cpp +++ b/libcxx/src/iostream.cpp @@ -85,12 +85,9 @@ __asm__("?wclog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_t ; #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS -// Hacky way to make the compiler believe that we're inside a system header so -// it doesn't flag the use of the init_priority attribute with a value that's -// reserved for the implementation (we're the implementation). -# 80 "iostream.cpp" 1 3 -_LIBCPP_HIDDEN ios_base::Init __start_std_streams _LIBCPP_INIT_PRIORITY_MAX; -# 82 "iostream.cpp" 2 +// Pretend we're inside a system header so the compiler doesn't flag the use of the init_priority +// attribute with a value that's reserved for the implementation (we're the implementation). +#include "iostream_init.h" // On Windows the TLS storage for locales needs to be initialized before we create // the standard streams, otherwise it may not be alive during program termination diff --git a/libcxx/src/iostream_init.h b/libcxx/src/iostream_init.h new file mode 100644 index 000000000000..b0a60f42a67c --- /dev/null +++ b/libcxx/src/iostream_init.h @@ -0,0 +1,2 @@ +#pragma GCC system_header +_LIBCPP_HIDDEN ios_base::Init __start_std_streams _LIBCPP_INIT_PRIORITY_MAX;
\ No newline at end of file diff --git a/libcxx/src/random.cpp b/libcxx/src/random.cpp index 86740dd49032..286a45785154 100644 --- a/libcxx/src/random.cpp +++ b/libcxx/src/random.cpp @@ -9,8 +9,8 @@ #include <__config> #if defined(_LIBCPP_USING_WIN32_RANDOM) -// Must be defined before including stdlib.h to enable rand_s(). -#define _CRT_RAND_S + // Must be defined before including stdlib.h to enable rand_s(). +# define _CRT_RAND_S #endif // defined(_LIBCPP_USING_WIN32_RANDOM) #include "limits" @@ -18,7 +18,7 @@ #include "system_error" #if defined(__sun__) -#define rename solaris_headers_are_broken +# define rename solaris_headers_are_broken #endif // defined(__sun__) #include <errno.h> @@ -26,16 +26,16 @@ #include <stdlib.h> #if defined(_LIBCPP_USING_GETENTROPY) -#include <sys/random.h> +# include <sys/random.h> #elif defined(_LIBCPP_USING_DEV_RANDOM) -#include <fcntl.h> -#include <unistd.h> -#if __has_include(<sys/ioctl.h>) && __has_include(<linux/random.h>) -#include <sys/ioctl.h> -#include <linux/random.h> -#endif +# include <fcntl.h> +# include <unistd.h> +# if __has_include(<sys/ioctl.h>) && __has_include(<linux/random.h>) +# include <sys/ioctl.h> +# include <linux/random.h> +# endif #elif defined(_LIBCPP_USING_NACL_RANDOM) -#include <nacl/nacl_random.h> +# include <nacl/nacl_random.h> #endif diff --git a/libcxx/src/ryu/README.txt b/libcxx/src/ryu/README.txt new file mode 100644 index 000000000000..e3d17469d476 --- /dev/null +++ b/libcxx/src/ryu/README.txt @@ -0,0 +1,11 @@ +The code in this directory is based on Ulf Adams's work. The upstream for the +code is: + +https://github.com/ulfjack/ryu/tree/59661c3/ryu + +The code has been adapted by Stephan T. Lavavej of Microsoft for usage in +std::to_chars. This code has been contributed by Microsoft for inclusion in +libc++. + +The code in this directory has a different coding style than other parts to +minimize the number of changes by both upstream sources. diff --git a/libcxx/src/ryu/d2fixed.cpp b/libcxx/src/ryu/d2fixed.cpp new file mode 100644 index 000000000000..699f9158f4c3 --- /dev/null +++ b/libcxx/src/ryu/d2fixed.cpp @@ -0,0 +1,669 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" +#include "charconv" +#include "cstring" +#include "system_error" + +#include "include/ryu/common.h" +#include "include/ryu/d2fixed.h" +#include "include/ryu/d2fixed_full_table.h" +#include "include/ryu/d2s.h" +#include "include/ryu/d2s_intrinsics.h" +#include "include/ryu/digit_table.h" + +_LIBCPP_BEGIN_NAMESPACE_STD + +inline constexpr int __POW10_ADDITIONAL_BITS = 120; + +#ifdef _LIBCPP_INTRINSIC128 +// Returns the low 64 bits of the high 128 bits of the 256-bit product of a and b. +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __umul256_hi128_lo64( + const uint64_t __aHi, const uint64_t __aLo, const uint64_t __bHi, const uint64_t __bLo) { + uint64_t __b00Hi; + const uint64_t __b00Lo = __ryu_umul128(__aLo, __bLo, &__b00Hi); + uint64_t __b01Hi; + const uint64_t __b01Lo = __ryu_umul128(__aLo, __bHi, &__b01Hi); + uint64_t __b10Hi; + const uint64_t __b10Lo = __ryu_umul128(__aHi, __bLo, &__b10Hi); + uint64_t __b11Hi; + const uint64_t __b11Lo = __ryu_umul128(__aHi, __bHi, &__b11Hi); + (void) __b00Lo; // unused + (void) __b11Hi; // unused + const uint64_t __temp1Lo = __b10Lo + __b00Hi; + const uint64_t __temp1Hi = __b10Hi + (__temp1Lo < __b10Lo); + const uint64_t __temp2Lo = __b01Lo + __temp1Lo; + const uint64_t __temp2Hi = __b01Hi + (__temp2Lo < __b01Lo); + return __b11Lo + __temp1Hi + __temp2Hi; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __uint128_mod1e9(const uint64_t __vHi, const uint64_t __vLo) { + // After multiplying, we're going to shift right by 29, then truncate to uint32_t. + // This means that we need only 29 + 32 = 61 bits, so we can truncate to uint64_t before shifting. + const uint64_t __multiplied = __umul256_hi128_lo64(__vHi, __vLo, 0x89705F4136B4A597u, 0x31680A88F8953031u); + + // For uint32_t truncation, see the __mod1e9() comment in d2s_intrinsics.h. + const uint32_t __shifted = static_cast<uint32_t>(__multiplied >> 29); + + return static_cast<uint32_t>(__vLo) - 1000000000 * __shifted; +} +#endif // ^^^ intrinsics available ^^^ + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulShift_mod1e9(const uint64_t __m, const uint64_t* const __mul, const int32_t __j) { + uint64_t __high0; // 64 + const uint64_t __low0 = __ryu_umul128(__m, __mul[0], &__high0); // 0 + uint64_t __high1; // 128 + const uint64_t __low1 = __ryu_umul128(__m, __mul[1], &__high1); // 64 + uint64_t __high2; // 192 + const uint64_t __low2 = __ryu_umul128(__m, __mul[2], &__high2); // 128 + const uint64_t __s0low = __low0; // 0 + (void) __s0low; // unused + const uint64_t __s0high = __low1 + __high0; // 64 + const uint32_t __c1 = __s0high < __low1; + const uint64_t __s1low = __low2 + __high1 + __c1; // 128 + const uint32_t __c2 = __s1low < __low2; // __high1 + __c1 can't overflow, so compare against __low2 + const uint64_t __s1high = __high2 + __c2; // 192 + _LIBCPP_ASSERT(__j >= 128, ""); + _LIBCPP_ASSERT(__j <= 180, ""); +#ifdef _LIBCPP_INTRINSIC128 + const uint32_t __dist = static_cast<uint32_t>(__j - 128); // __dist: [0, 52] + const uint64_t __shiftedhigh = __s1high >> __dist; + const uint64_t __shiftedlow = __ryu_shiftright128(__s1low, __s1high, __dist); + return __uint128_mod1e9(__shiftedhigh, __shiftedlow); +#else // ^^^ intrinsics available ^^^ / vvv intrinsics unavailable vvv + if (__j < 160) { // __j: [128, 160) + const uint64_t __r0 = __mod1e9(__s1high); + const uint64_t __r1 = __mod1e9((__r0 << 32) | (__s1low >> 32)); + const uint64_t __r2 = ((__r1 << 32) | (__s1low & 0xffffffff)); + return __mod1e9(__r2 >> (__j - 128)); + } else { // __j: [160, 192) + const uint64_t __r0 = __mod1e9(__s1high); + const uint64_t __r1 = ((__r0 << 32) | (__s1low >> 32)); + return __mod1e9(__r1 >> (__j - 160)); + } +#endif // ^^^ intrinsics unavailable ^^^ +} + +void __append_n_digits(const uint32_t __olength, uint32_t __digits, char* const __result) { + uint32_t __i = 0; + while (__digits >= 10000) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = __digits - 10000 * (__digits / 10000); +#else + const uint32_t __c = __digits % 10000; +#endif + __digits /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(__result + __olength - __i - 2, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(__result + __olength - __i - 4, __DIGIT_TABLE + __c1, 2); + __i += 4; + } + if (__digits >= 100) { + const uint32_t __c = (__digits % 100) << 1; + __digits /= 100; + _VSTD::memcpy(__result + __olength - __i - 2, __DIGIT_TABLE + __c, 2); + __i += 2; + } + if (__digits >= 10) { + const uint32_t __c = __digits << 1; + _VSTD::memcpy(__result + __olength - __i - 2, __DIGIT_TABLE + __c, 2); + } else { + __result[0] = static_cast<char>('0' + __digits); + } +} + +_LIBCPP_HIDE_FROM_ABI inline void __append_d_digits(const uint32_t __olength, uint32_t __digits, char* const __result) { + uint32_t __i = 0; + while (__digits >= 10000) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = __digits - 10000 * (__digits / 10000); +#else + const uint32_t __c = __digits % 10000; +#endif + __digits /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(__result + __olength + 1 - __i - 2, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(__result + __olength + 1 - __i - 4, __DIGIT_TABLE + __c1, 2); + __i += 4; + } + if (__digits >= 100) { + const uint32_t __c = (__digits % 100) << 1; + __digits /= 100; + _VSTD::memcpy(__result + __olength + 1 - __i - 2, __DIGIT_TABLE + __c, 2); + __i += 2; + } + if (__digits >= 10) { + const uint32_t __c = __digits << 1; + __result[2] = __DIGIT_TABLE[__c + 1]; + __result[1] = '.'; + __result[0] = __DIGIT_TABLE[__c]; + } else { + __result[1] = '.'; + __result[0] = static_cast<char>('0' + __digits); + } +} + +_LIBCPP_HIDE_FROM_ABI inline void __append_c_digits(const uint32_t __count, uint32_t __digits, char* const __result) { + uint32_t __i = 0; + for (; __i < __count - 1; __i += 2) { + const uint32_t __c = (__digits % 100) << 1; + __digits /= 100; + _VSTD::memcpy(__result + __count - __i - 2, __DIGIT_TABLE + __c, 2); + } + if (__i < __count) { + const char __c = static_cast<char>('0' + (__digits % 10)); + __result[__count - __i - 1] = __c; + } +} + +void __append_nine_digits(uint32_t __digits, char* const __result) { + if (__digits == 0) { + _VSTD::memset(__result, '0', 9); + return; + } + + for (uint32_t __i = 0; __i < 5; __i += 4) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = __digits - 10000 * (__digits / 10000); +#else + const uint32_t __c = __digits % 10000; +#endif + __digits /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(__result + 7 - __i, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(__result + 5 - __i, __DIGIT_TABLE + __c1, 2); + } + __result[0] = static_cast<char>('0' + __digits); +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __indexForExponent(const uint32_t __e) { + return (__e + 15) / 16; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __pow10BitsForIndex(const uint32_t __idx) { + return 16 * __idx + __POW10_ADDITIONAL_BITS; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __lengthForIndex(const uint32_t __idx) { + // +1 for ceil, +16 for mantissa, +8 to round up when dividing by 9 + return (__log10Pow2(16 * static_cast<int32_t>(__idx)) + 1 + 16 + 8) / 9; +} + +[[nodiscard]] to_chars_result __d2fixed_buffered_n(char* _First, char* const _Last, const double __d, + const uint32_t __precision) { + char* const _Original_first = _First; + + const uint64_t __bits = __double_to_bits(__d); + + // Case distinction; exit early for the easy cases. + if (__bits == 0) { + const int32_t _Total_zero_length = 1 // leading zero + + static_cast<int32_t>(__precision != 0) // possible decimal point + + static_cast<int32_t>(__precision); // zeroes after decimal point + + if (_Last - _First < _Total_zero_length) { + return { _Last, errc::value_too_large }; + } + + *_First++ = '0'; + if (__precision > 0) { + *_First++ = '.'; + _VSTD::memset(_First, '0', __precision); + _First += __precision; + } + return { _First, errc{} }; + } + + // Decode __bits into mantissa and exponent. + const uint64_t __ieeeMantissa = __bits & ((1ull << __DOUBLE_MANTISSA_BITS) - 1); + const uint32_t __ieeeExponent = static_cast<uint32_t>(__bits >> __DOUBLE_MANTISSA_BITS); + + int32_t __e2; + uint64_t __m2; + if (__ieeeExponent == 0) { + __e2 = 1 - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; + __m2 = __ieeeMantissa; + } else { + __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; + __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa; + } + + bool __nonzero = false; + if (__e2 >= -52) { + const uint32_t __idx = __e2 < 0 ? 0 : __indexForExponent(static_cast<uint32_t>(__e2)); + const uint32_t __p10bits = __pow10BitsForIndex(__idx); + const int32_t __len = static_cast<int32_t>(__lengthForIndex(__idx)); + for (int32_t __i = __len - 1; __i >= 0; --__i) { + const uint32_t __j = __p10bits - __e2; + // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is + // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers. + const uint32_t __digits = __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT[__POW10_OFFSET[__idx] + __i], + static_cast<int32_t>(__j + 8)); + if (__nonzero) { + if (_Last - _First < 9) { + return { _Last, errc::value_too_large }; + } + __append_nine_digits(__digits, _First); + _First += 9; + } else if (__digits != 0) { + const uint32_t __olength = __decimalLength9(__digits); + if (_Last - _First < static_cast<ptrdiff_t>(__olength)) { + return { _Last, errc::value_too_large }; + } + __append_n_digits(__olength, __digits, _First); + _First += __olength; + __nonzero = true; + } + } + } + if (!__nonzero) { + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + *_First++ = '0'; + } + if (__precision > 0) { + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + *_First++ = '.'; + } + if (__e2 < 0) { + const int32_t __idx = -__e2 / 16; + const uint32_t __blocks = __precision / 9 + 1; + // 0 = don't round up; 1 = round up unconditionally; 2 = round up if odd. + int __roundUp = 0; + uint32_t __i = 0; + if (__blocks <= __MIN_BLOCK_2[__idx]) { + __i = __blocks; + if (_Last - _First < static_cast<ptrdiff_t>(__precision)) { + return { _Last, errc::value_too_large }; + } + _VSTD::memset(_First, '0', __precision); + _First += __precision; + } else if (__i < __MIN_BLOCK_2[__idx]) { + __i = __MIN_BLOCK_2[__idx]; + if (_Last - _First < static_cast<ptrdiff_t>(9 * __i)) { + return { _Last, errc::value_too_large }; + } + _VSTD::memset(_First, '0', 9 * __i); + _First += 9 * __i; + } + for (; __i < __blocks; ++__i) { + const int32_t __j = __ADDITIONAL_BITS_2 + (-__e2 - 16 * __idx); + const uint32_t __p = __POW10_OFFSET_2[__idx] + __i - __MIN_BLOCK_2[__idx]; + if (__p >= __POW10_OFFSET_2[__idx + 1]) { + // If the remaining digits are all 0, then we might as well use memset. + // No rounding required in this case. + const uint32_t __fill = __precision - 9 * __i; + if (_Last - _First < static_cast<ptrdiff_t>(__fill)) { + return { _Last, errc::value_too_large }; + } + _VSTD::memset(_First, '0', __fill); + _First += __fill; + break; + } + // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is + // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers. + uint32_t __digits = __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT_2[__p], __j + 8); + if (__i < __blocks - 1) { + if (_Last - _First < 9) { + return { _Last, errc::value_too_large }; + } + __append_nine_digits(__digits, _First); + _First += 9; + } else { + const uint32_t __maximum = __precision - 9 * __i; + uint32_t __lastDigit = 0; + for (uint32_t __k = 0; __k < 9 - __maximum; ++__k) { + __lastDigit = __digits % 10; + __digits /= 10; + } + if (__lastDigit != 5) { + __roundUp = __lastDigit > 5; + } else { + // Is m * 10^(additionalDigits + 1) / 2^(-__e2) integer? + const int32_t __requiredTwos = -__e2 - static_cast<int32_t>(__precision) - 1; + const bool __trailingZeros = __requiredTwos <= 0 + || (__requiredTwos < 60 && __multipleOfPowerOf2(__m2, static_cast<uint32_t>(__requiredTwos))); + __roundUp = __trailingZeros ? 2 : 1; + } + if (__maximum > 0) { + if (_Last - _First < static_cast<ptrdiff_t>(__maximum)) { + return { _Last, errc::value_too_large }; + } + __append_c_digits(__maximum, __digits, _First); + _First += __maximum; + } + break; + } + } + if (__roundUp != 0) { + char* _Round = _First; + char* _Dot = _Last; + while (true) { + if (_Round == _Original_first) { + _Round[0] = '1'; + if (_Dot != _Last) { + _Dot[0] = '0'; + _Dot[1] = '.'; + } + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + *_First++ = '0'; + break; + } + --_Round; + const char __c = _Round[0]; + if (__c == '.') { + _Dot = _Round; + } else if (__c == '9') { + _Round[0] = '0'; + __roundUp = 1; + } else { + if (__roundUp == 1 || __c % 2 != 0) { + _Round[0] = __c + 1; + } + break; + } + } + } + } else { + if (_Last - _First < static_cast<ptrdiff_t>(__precision)) { + return { _Last, errc::value_too_large }; + } + _VSTD::memset(_First, '0', __precision); + _First += __precision; + } + return { _First, errc{} }; +} + +[[nodiscard]] to_chars_result __d2exp_buffered_n(char* _First, char* const _Last, const double __d, + uint32_t __precision) { + char* const _Original_first = _First; + + const uint64_t __bits = __double_to_bits(__d); + + // Case distinction; exit early for the easy cases. + if (__bits == 0) { + const int32_t _Total_zero_length = 1 // leading zero + + static_cast<int32_t>(__precision != 0) // possible decimal point + + static_cast<int32_t>(__precision) // zeroes after decimal point + + 4; // "e+00" + if (_Last - _First < _Total_zero_length) { + return { _Last, errc::value_too_large }; + } + *_First++ = '0'; + if (__precision > 0) { + *_First++ = '.'; + _VSTD::memset(_First, '0', __precision); + _First += __precision; + } + _VSTD::memcpy(_First, "e+00", 4); + _First += 4; + return { _First, errc{} }; + } + + // Decode __bits into mantissa and exponent. + const uint64_t __ieeeMantissa = __bits & ((1ull << __DOUBLE_MANTISSA_BITS) - 1); + const uint32_t __ieeeExponent = static_cast<uint32_t>(__bits >> __DOUBLE_MANTISSA_BITS); + + int32_t __e2; + uint64_t __m2; + if (__ieeeExponent == 0) { + __e2 = 1 - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; + __m2 = __ieeeMantissa; + } else { + __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; + __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa; + } + + const bool __printDecimalPoint = __precision > 0; + ++__precision; + uint32_t __digits = 0; + uint32_t __printedDigits = 0; + uint32_t __availableDigits = 0; + int32_t __exp = 0; + if (__e2 >= -52) { + const uint32_t __idx = __e2 < 0 ? 0 : __indexForExponent(static_cast<uint32_t>(__e2)); + const uint32_t __p10bits = __pow10BitsForIndex(__idx); + const int32_t __len = static_cast<int32_t>(__lengthForIndex(__idx)); + for (int32_t __i = __len - 1; __i >= 0; --__i) { + const uint32_t __j = __p10bits - __e2; + // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is + // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers. + __digits = __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT[__POW10_OFFSET[__idx] + __i], + static_cast<int32_t>(__j + 8)); + if (__printedDigits != 0) { + if (__printedDigits + 9 > __precision) { + __availableDigits = 9; + break; + } + if (_Last - _First < 9) { + return { _Last, errc::value_too_large }; + } + __append_nine_digits(__digits, _First); + _First += 9; + __printedDigits += 9; + } else if (__digits != 0) { + __availableDigits = __decimalLength9(__digits); + __exp = __i * 9 + static_cast<int32_t>(__availableDigits) - 1; + if (__availableDigits > __precision) { + break; + } + if (__printDecimalPoint) { + if (_Last - _First < static_cast<ptrdiff_t>(__availableDigits + 1)) { + return { _Last, errc::value_too_large }; + } + __append_d_digits(__availableDigits, __digits, _First); + _First += __availableDigits + 1; // +1 for decimal point + } else { + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + *_First++ = static_cast<char>('0' + __digits); + } + __printedDigits = __availableDigits; + __availableDigits = 0; + } + } + } + + if (__e2 < 0 && __availableDigits == 0) { + const int32_t __idx = -__e2 / 16; + for (int32_t __i = __MIN_BLOCK_2[__idx]; __i < 200; ++__i) { + const int32_t __j = __ADDITIONAL_BITS_2 + (-__e2 - 16 * __idx); + const uint32_t __p = __POW10_OFFSET_2[__idx] + static_cast<uint32_t>(__i) - __MIN_BLOCK_2[__idx]; + // Temporary: __j is usually around 128, and by shifting a bit, we push it to 128 or above, which is + // a slightly faster code path in __mulShift_mod1e9. Instead, we can just increase the multipliers. + __digits = (__p >= __POW10_OFFSET_2[__idx + 1]) ? 0 : __mulShift_mod1e9(__m2 << 8, __POW10_SPLIT_2[__p], __j + 8); + if (__printedDigits != 0) { + if (__printedDigits + 9 > __precision) { + __availableDigits = 9; + break; + } + if (_Last - _First < 9) { + return { _Last, errc::value_too_large }; + } + __append_nine_digits(__digits, _First); + _First += 9; + __printedDigits += 9; + } else if (__digits != 0) { + __availableDigits = __decimalLength9(__digits); + __exp = -(__i + 1) * 9 + static_cast<int32_t>(__availableDigits) - 1; + if (__availableDigits > __precision) { + break; + } + if (__printDecimalPoint) { + if (_Last - _First < static_cast<ptrdiff_t>(__availableDigits + 1)) { + return { _Last, errc::value_too_large }; + } + __append_d_digits(__availableDigits, __digits, _First); + _First += __availableDigits + 1; // +1 for decimal point + } else { + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + *_First++ = static_cast<char>('0' + __digits); + } + __printedDigits = __availableDigits; + __availableDigits = 0; + } + } + } + + const uint32_t __maximum = __precision - __printedDigits; + if (__availableDigits == 0) { + __digits = 0; + } + uint32_t __lastDigit = 0; + if (__availableDigits > __maximum) { + for (uint32_t __k = 0; __k < __availableDigits - __maximum; ++__k) { + __lastDigit = __digits % 10; + __digits /= 10; + } + } + // 0 = don't round up; 1 = round up unconditionally; 2 = round up if odd. + int __roundUp = 0; + if (__lastDigit != 5) { + __roundUp = __lastDigit > 5; + } else { + // Is m * 2^__e2 * 10^(__precision + 1 - __exp) integer? + // __precision was already increased by 1, so we don't need to write + 1 here. + const int32_t __rexp = static_cast<int32_t>(__precision) - __exp; + const int32_t __requiredTwos = -__e2 - __rexp; + bool __trailingZeros = __requiredTwos <= 0 + || (__requiredTwos < 60 && __multipleOfPowerOf2(__m2, static_cast<uint32_t>(__requiredTwos))); + if (__rexp < 0) { + const int32_t __requiredFives = -__rexp; + __trailingZeros = __trailingZeros && __multipleOfPowerOf5(__m2, static_cast<uint32_t>(__requiredFives)); + } + __roundUp = __trailingZeros ? 2 : 1; + } + if (__printedDigits != 0) { + if (_Last - _First < static_cast<ptrdiff_t>(__maximum)) { + return { _Last, errc::value_too_large }; + } + if (__digits == 0) { + _VSTD::memset(_First, '0', __maximum); + } else { + __append_c_digits(__maximum, __digits, _First); + } + _First += __maximum; + } else { + if (__printDecimalPoint) { + if (_Last - _First < static_cast<ptrdiff_t>(__maximum + 1)) { + return { _Last, errc::value_too_large }; + } + __append_d_digits(__maximum, __digits, _First); + _First += __maximum + 1; // +1 for decimal point + } else { + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + *_First++ = static_cast<char>('0' + __digits); + } + } + if (__roundUp != 0) { + char* _Round = _First; + while (true) { + if (_Round == _Original_first) { + _Round[0] = '1'; + ++__exp; + break; + } + --_Round; + const char __c = _Round[0]; + if (__c == '.') { + // Keep going. + } else if (__c == '9') { + _Round[0] = '0'; + __roundUp = 1; + } else { + if (__roundUp == 1 || __c % 2 != 0) { + _Round[0] = __c + 1; + } + break; + } + } + } + + char _Sign_character; + + if (__exp < 0) { + _Sign_character = '-'; + __exp = -__exp; + } else { + _Sign_character = '+'; + } + + const int _Exponent_part_length = __exp >= 100 + ? 5 // "e+NNN" + : 4; // "e+NN" + + if (_Last - _First < _Exponent_part_length) { + return { _Last, errc::value_too_large }; + } + + *_First++ = 'e'; + *_First++ = _Sign_character; + + if (__exp >= 100) { + const int32_t __c = __exp % 10; + _VSTD::memcpy(_First, __DIGIT_TABLE + 2 * (__exp / 10), 2); + _First[2] = static_cast<char>('0' + __c); + _First += 3; + } else { + _VSTD::memcpy(_First, __DIGIT_TABLE + 2 * __exp, 2); + _First += 2; + } + + return { _First, errc{} }; +} + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on diff --git a/libcxx/src/ryu/d2s.cpp b/libcxx/src/ryu/d2s.cpp new file mode 100644 index 000000000000..510b4b8aa3af --- /dev/null +++ b/libcxx/src/ryu/d2s.cpp @@ -0,0 +1,782 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" +#include "charconv" + +#include "include/ryu/common.h" +#include "include/ryu/d2fixed.h" +#include "include/ryu/d2s.h" +#include "include/ryu/d2s_full_table.h" +#include "include/ryu/d2s_intrinsics.h" +#include "include/ryu/digit_table.h" +#include "include/ryu/ryu.h" + +_LIBCPP_BEGIN_NAMESPACE_STD + +// We need a 64x128-bit multiplication and a subsequent 128-bit shift. +// Multiplication: +// The 64-bit factor is variable and passed in, the 128-bit factor comes +// from a lookup table. We know that the 64-bit factor only has 55 +// significant bits (i.e., the 9 topmost bits are zeros). The 128-bit +// factor only has 124 significant bits (i.e., the 4 topmost bits are +// zeros). +// Shift: +// In principle, the multiplication result requires 55 + 124 = 179 bits to +// represent. However, we then shift this value to the right by __j, which is +// at least __j >= 115, so the result is guaranteed to fit into 179 - 115 = 64 +// bits. This means that we only need the topmost 64 significant bits of +// the 64x128-bit multiplication. +// +// There are several ways to do this: +// 1. Best case: the compiler exposes a 128-bit type. +// We perform two 64x64-bit multiplications, add the higher 64 bits of the +// lower result to the higher result, and shift by __j - 64 bits. +// +// We explicitly cast from 64-bit to 128-bit, so the compiler can tell +// that these are only 64-bit inputs, and can map these to the best +// possible sequence of assembly instructions. +// x64 machines happen to have matching assembly instructions for +// 64x64-bit multiplications and 128-bit shifts. +// +// 2. Second best case: the compiler exposes intrinsics for the x64 assembly +// instructions mentioned in 1. +// +// 3. We only have 64x64 bit instructions that return the lower 64 bits of +// the result, i.e., we have to use plain C. +// Our inputs are less than the full width, so we have three options: +// a. Ignore this fact and just implement the intrinsics manually. +// b. Split both into 31-bit pieces, which guarantees no internal overflow, +// but requires extra work upfront (unless we change the lookup table). +// c. Split only the first factor into 31-bit pieces, which also guarantees +// no internal overflow, but requires extra work since the intermediate +// results are not perfectly aligned. +#ifdef _LIBCPP_INTRINSIC128 + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __mulShift(const uint64_t __m, const uint64_t* const __mul, const int32_t __j) { + // __m is maximum 55 bits + uint64_t __high1; // 128 + const uint64_t __low1 = __ryu_umul128(__m, __mul[1], &__high1); // 64 + uint64_t __high0; // 64 + (void) __ryu_umul128(__m, __mul[0], &__high0); // 0 + const uint64_t __sum = __high0 + __low1; + if (__sum < __high0) { + ++__high1; // overflow into __high1 + } + return __ryu_shiftright128(__sum, __high1, static_cast<uint32_t>(__j - 64)); +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint64_t __mulShiftAll(const uint64_t __m, const uint64_t* const __mul, const int32_t __j, + uint64_t* const __vp, uint64_t* const __vm, const uint32_t __mmShift) { + *__vp = __mulShift(4 * __m + 2, __mul, __j); + *__vm = __mulShift(4 * __m - 1 - __mmShift, __mul, __j); + return __mulShift(4 * __m, __mul, __j); +} + +#else // ^^^ intrinsics available ^^^ / vvv intrinsics unavailable vvv + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline _LIBCPP_ALWAYS_INLINE uint64_t __mulShiftAll(uint64_t __m, const uint64_t* const __mul, const int32_t __j, + uint64_t* const __vp, uint64_t* const __vm, const uint32_t __mmShift) { // TRANSITION, VSO-634761 + __m <<= 1; + // __m is maximum 55 bits + uint64_t __tmp; + const uint64_t __lo = __ryu_umul128(__m, __mul[0], &__tmp); + uint64_t __hi; + const uint64_t __mid = __tmp + __ryu_umul128(__m, __mul[1], &__hi); + __hi += __mid < __tmp; // overflow into __hi + + const uint64_t __lo2 = __lo + __mul[0]; + const uint64_t __mid2 = __mid + __mul[1] + (__lo2 < __lo); + const uint64_t __hi2 = __hi + (__mid2 < __mid); + *__vp = __ryu_shiftright128(__mid2, __hi2, static_cast<uint32_t>(__j - 64 - 1)); + + if (__mmShift == 1) { + const uint64_t __lo3 = __lo - __mul[0]; + const uint64_t __mid3 = __mid - __mul[1] - (__lo3 > __lo); + const uint64_t __hi3 = __hi - (__mid3 > __mid); + *__vm = __ryu_shiftright128(__mid3, __hi3, static_cast<uint32_t>(__j - 64 - 1)); + } else { + const uint64_t __lo3 = __lo + __lo; + const uint64_t __mid3 = __mid + __mid + (__lo3 < __lo); + const uint64_t __hi3 = __hi + __hi + (__mid3 < __mid); + const uint64_t __lo4 = __lo3 - __mul[0]; + const uint64_t __mid4 = __mid3 - __mul[1] - (__lo4 > __lo3); + const uint64_t __hi4 = __hi3 - (__mid4 > __mid3); + *__vm = __ryu_shiftright128(__mid4, __hi4, static_cast<uint32_t>(__j - 64)); + } + + return __ryu_shiftright128(__mid, __hi, static_cast<uint32_t>(__j - 64 - 1)); +} + +#endif // ^^^ intrinsics unavailable ^^^ + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __decimalLength17(const uint64_t __v) { + // This is slightly faster than a loop. + // The average output length is 16.38 digits, so we check high-to-low. + // Function precondition: __v is not an 18, 19, or 20-digit number. + // (17 digits are sufficient for round-tripping.) + _LIBCPP_ASSERT(__v < 100000000000000000u, ""); + if (__v >= 10000000000000000u) { return 17; } + if (__v >= 1000000000000000u) { return 16; } + if (__v >= 100000000000000u) { return 15; } + if (__v >= 10000000000000u) { return 14; } + if (__v >= 1000000000000u) { return 13; } + if (__v >= 100000000000u) { return 12; } + if (__v >= 10000000000u) { return 11; } + if (__v >= 1000000000u) { return 10; } + if (__v >= 100000000u) { return 9; } + if (__v >= 10000000u) { return 8; } + if (__v >= 1000000u) { return 7; } + if (__v >= 100000u) { return 6; } + if (__v >= 10000u) { return 5; } + if (__v >= 1000u) { return 4; } + if (__v >= 100u) { return 3; } + if (__v >= 10u) { return 2; } + return 1; +} + +// A floating decimal representing m * 10^e. +struct __floating_decimal_64 { + uint64_t __mantissa; + int32_t __exponent; +}; + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline __floating_decimal_64 __d2d(const uint64_t __ieeeMantissa, const uint32_t __ieeeExponent) { + int32_t __e2; + uint64_t __m2; + if (__ieeeExponent == 0) { + // We subtract 2 so that the bounds computation has 2 additional bits. + __e2 = 1 - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS - 2; + __m2 = __ieeeMantissa; + } else { + __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS - 2; + __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa; + } + const bool __even = (__m2 & 1) == 0; + const bool __acceptBounds = __even; + + // Step 2: Determine the interval of valid decimal representations. + const uint64_t __mv = 4 * __m2; + // Implicit bool -> int conversion. True is 1, false is 0. + const uint32_t __mmShift = __ieeeMantissa != 0 || __ieeeExponent <= 1; + // We would compute __mp and __mm like this: + // uint64_t __mp = 4 * __m2 + 2; + // uint64_t __mm = __mv - 1 - __mmShift; + + // Step 3: Convert to a decimal power base using 128-bit arithmetic. + uint64_t __vr, __vp, __vm; + int32_t __e10; + bool __vmIsTrailingZeros = false; + bool __vrIsTrailingZeros = false; + if (__e2 >= 0) { + // I tried special-casing __q == 0, but there was no effect on performance. + // This expression is slightly faster than max(0, __log10Pow2(__e2) - 1). + const uint32_t __q = __log10Pow2(__e2) - (__e2 > 3); + __e10 = static_cast<int32_t>(__q); + const int32_t __k = __DOUBLE_POW5_INV_BITCOUNT + __pow5bits(static_cast<int32_t>(__q)) - 1; + const int32_t __i = -__e2 + static_cast<int32_t>(__q) + __k; + __vr = __mulShiftAll(__m2, __DOUBLE_POW5_INV_SPLIT[__q], __i, &__vp, &__vm, __mmShift); + if (__q <= 21) { + // This should use __q <= 22, but I think 21 is also safe. Smaller values + // may still be safe, but it's more difficult to reason about them. + // Only one of __mp, __mv, and __mm can be a multiple of 5, if any. + const uint32_t __mvMod5 = static_cast<uint32_t>(__mv) - 5 * static_cast<uint32_t>(__div5(__mv)); + if (__mvMod5 == 0) { + __vrIsTrailingZeros = __multipleOfPowerOf5(__mv, __q); + } else if (__acceptBounds) { + // Same as min(__e2 + (~__mm & 1), __pow5Factor(__mm)) >= __q + // <=> __e2 + (~__mm & 1) >= __q && __pow5Factor(__mm) >= __q + // <=> true && __pow5Factor(__mm) >= __q, since __e2 >= __q. + __vmIsTrailingZeros = __multipleOfPowerOf5(__mv - 1 - __mmShift, __q); + } else { + // Same as min(__e2 + 1, __pow5Factor(__mp)) >= __q. + __vp -= __multipleOfPowerOf5(__mv + 2, __q); + } + } + } else { + // This expression is slightly faster than max(0, __log10Pow5(-__e2) - 1). + const uint32_t __q = __log10Pow5(-__e2) - (-__e2 > 1); + __e10 = static_cast<int32_t>(__q) + __e2; + const int32_t __i = -__e2 - static_cast<int32_t>(__q); + const int32_t __k = __pow5bits(__i) - __DOUBLE_POW5_BITCOUNT; + const int32_t __j = static_cast<int32_t>(__q) - __k; + __vr = __mulShiftAll(__m2, __DOUBLE_POW5_SPLIT[__i], __j, &__vp, &__vm, __mmShift); + if (__q <= 1) { + // {__vr,__vp,__vm} is trailing zeros if {__mv,__mp,__mm} has at least __q trailing 0 bits. + // __mv = 4 * __m2, so it always has at least two trailing 0 bits. + __vrIsTrailingZeros = true; + if (__acceptBounds) { + // __mm = __mv - 1 - __mmShift, so it has 1 trailing 0 bit iff __mmShift == 1. + __vmIsTrailingZeros = __mmShift == 1; + } else { + // __mp = __mv + 2, so it always has at least one trailing 0 bit. + --__vp; + } + } else if (__q < 63) { // TRANSITION(ulfjack): Use a tighter bound here. + // We need to compute min(ntz(__mv), __pow5Factor(__mv) - __e2) >= __q - 1 + // <=> ntz(__mv) >= __q - 1 && __pow5Factor(__mv) - __e2 >= __q - 1 + // <=> ntz(__mv) >= __q - 1 (__e2 is negative and -__e2 >= __q) + // <=> (__mv & ((1 << (__q - 1)) - 1)) == 0 + // We also need to make sure that the left shift does not overflow. + __vrIsTrailingZeros = __multipleOfPowerOf2(__mv, __q - 1); + } + } + + // Step 4: Find the shortest decimal representation in the interval of valid representations. + int32_t __removed = 0; + uint8_t __lastRemovedDigit = 0; + uint64_t _Output; + // On average, we remove ~2 digits. + if (__vmIsTrailingZeros || __vrIsTrailingZeros) { + // General case, which happens rarely (~0.7%). + for (;;) { + const uint64_t __vpDiv10 = __div10(__vp); + const uint64_t __vmDiv10 = __div10(__vm); + if (__vpDiv10 <= __vmDiv10) { + break; + } + const uint32_t __vmMod10 = static_cast<uint32_t>(__vm) - 10 * static_cast<uint32_t>(__vmDiv10); + const uint64_t __vrDiv10 = __div10(__vr); + const uint32_t __vrMod10 = static_cast<uint32_t>(__vr) - 10 * static_cast<uint32_t>(__vrDiv10); + __vmIsTrailingZeros &= __vmMod10 == 0; + __vrIsTrailingZeros &= __lastRemovedDigit == 0; + __lastRemovedDigit = static_cast<uint8_t>(__vrMod10); + __vr = __vrDiv10; + __vp = __vpDiv10; + __vm = __vmDiv10; + ++__removed; + } + if (__vmIsTrailingZeros) { + for (;;) { + const uint64_t __vmDiv10 = __div10(__vm); + const uint32_t __vmMod10 = static_cast<uint32_t>(__vm) - 10 * static_cast<uint32_t>(__vmDiv10); + if (__vmMod10 != 0) { + break; + } + const uint64_t __vpDiv10 = __div10(__vp); + const uint64_t __vrDiv10 = __div10(__vr); + const uint32_t __vrMod10 = static_cast<uint32_t>(__vr) - 10 * static_cast<uint32_t>(__vrDiv10); + __vrIsTrailingZeros &= __lastRemovedDigit == 0; + __lastRemovedDigit = static_cast<uint8_t>(__vrMod10); + __vr = __vrDiv10; + __vp = __vpDiv10; + __vm = __vmDiv10; + ++__removed; + } + } + if (__vrIsTrailingZeros && __lastRemovedDigit == 5 && __vr % 2 == 0) { + // Round even if the exact number is .....50..0. + __lastRemovedDigit = 4; + } + // We need to take __vr + 1 if __vr is outside bounds or we need to round up. + _Output = __vr + ((__vr == __vm && (!__acceptBounds || !__vmIsTrailingZeros)) || __lastRemovedDigit >= 5); + } else { + // Specialized for the common case (~99.3%). Percentages below are relative to this. + bool __roundUp = false; + const uint64_t __vpDiv100 = __div100(__vp); + const uint64_t __vmDiv100 = __div100(__vm); + if (__vpDiv100 > __vmDiv100) { // Optimization: remove two digits at a time (~86.2%). + const uint64_t __vrDiv100 = __div100(__vr); + const uint32_t __vrMod100 = static_cast<uint32_t>(__vr) - 100 * static_cast<uint32_t>(__vrDiv100); + __roundUp = __vrMod100 >= 50; + __vr = __vrDiv100; + __vp = __vpDiv100; + __vm = __vmDiv100; + __removed += 2; + } + // Loop iterations below (approximately), without optimization above: + // 0: 0.03%, 1: 13.8%, 2: 70.6%, 3: 14.0%, 4: 1.40%, 5: 0.14%, 6+: 0.02% + // Loop iterations below (approximately), with optimization above: + // 0: 70.6%, 1: 27.8%, 2: 1.40%, 3: 0.14%, 4+: 0.02% + for (;;) { + const uint64_t __vpDiv10 = __div10(__vp); + const uint64_t __vmDiv10 = __div10(__vm); + if (__vpDiv10 <= __vmDiv10) { + break; + } + const uint64_t __vrDiv10 = __div10(__vr); + const uint32_t __vrMod10 = static_cast<uint32_t>(__vr) - 10 * static_cast<uint32_t>(__vrDiv10); + __roundUp = __vrMod10 >= 5; + __vr = __vrDiv10; + __vp = __vpDiv10; + __vm = __vmDiv10; + ++__removed; + } + // We need to take __vr + 1 if __vr is outside bounds or we need to round up. + _Output = __vr + (__vr == __vm || __roundUp); + } + const int32_t __exp = __e10 + __removed; + + __floating_decimal_64 __fd; + __fd.__exponent = __exp; + __fd.__mantissa = _Output; + return __fd; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline to_chars_result __to_chars(char* const _First, char* const _Last, const __floating_decimal_64 __v, + chars_format _Fmt, const double __f) { + // Step 5: Print the decimal representation. + uint64_t _Output = __v.__mantissa; + int32_t _Ryu_exponent = __v.__exponent; + const uint32_t __olength = __decimalLength17(_Output); + int32_t _Scientific_exponent = _Ryu_exponent + static_cast<int32_t>(__olength) - 1; + + if (_Fmt == chars_format{}) { + int32_t _Lower; + int32_t _Upper; + + if (__olength == 1) { + // Value | Fixed | Scientific + // 1e-3 | "0.001" | "1e-03" + // 1e4 | "10000" | "1e+04" + _Lower = -3; + _Upper = 4; + } else { + // Value | Fixed | Scientific + // 1234e-7 | "0.0001234" | "1.234e-04" + // 1234e5 | "123400000" | "1.234e+08" + _Lower = -static_cast<int32_t>(__olength + 3); + _Upper = 5; + } + + if (_Lower <= _Ryu_exponent && _Ryu_exponent <= _Upper) { + _Fmt = chars_format::fixed; + } else { + _Fmt = chars_format::scientific; + } + } else if (_Fmt == chars_format::general) { + // C11 7.21.6.1 "The fprintf function"/8: + // "Let P equal [...] 6 if the precision is omitted [...]. + // Then, if a conversion with style E would have an exponent of X: + // - if P > X >= -4, the conversion is with style f [...]. + // - otherwise, the conversion is with style e [...]." + if (-4 <= _Scientific_exponent && _Scientific_exponent < 6) { + _Fmt = chars_format::fixed; + } else { + _Fmt = chars_format::scientific; + } + } + + if (_Fmt == chars_format::fixed) { + // Example: _Output == 1729, __olength == 4 + + // _Ryu_exponent | Printed | _Whole_digits | _Total_fixed_length | Notes + // --------------|----------|---------------|----------------------|--------------------------------------- + // 2 | 172900 | 6 | _Whole_digits | Ryu can't be used for printing + // 1 | 17290 | 5 | (sometimes adjusted) | when the trimmed digits are nonzero. + // --------------|----------|---------------|----------------------|--------------------------------------- + // 0 | 1729 | 4 | _Whole_digits | Unified length cases. + // --------------|----------|---------------|----------------------|--------------------------------------- + // -1 | 172.9 | 3 | __olength + 1 | This case can't happen for + // -2 | 17.29 | 2 | | __olength == 1, but no additional + // -3 | 1.729 | 1 | | code is needed to avoid it. + // --------------|----------|---------------|----------------------|--------------------------------------- + // -4 | 0.1729 | 0 | 2 - _Ryu_exponent | C11 7.21.6.1 "The fprintf function"/8: + // -5 | 0.01729 | -1 | | "If a decimal-point character appears, + // -6 | 0.001729 | -2 | | at least one digit appears before it." + + const int32_t _Whole_digits = static_cast<int32_t>(__olength) + _Ryu_exponent; + + uint32_t _Total_fixed_length; + if (_Ryu_exponent >= 0) { // cases "172900" and "1729" + _Total_fixed_length = static_cast<uint32_t>(_Whole_digits); + if (_Output == 1) { + // Rounding can affect the number of digits. + // For example, 1e23 is exactly "99999999999999991611392" which is 23 digits instead of 24. + // We can use a lookup table to detect this and adjust the total length. + static constexpr uint8_t _Adjustment[309] = { + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,1,0,1,0,1,1,1,0,1,1,1,0,0,0,0,0, + 1,1,0,0,1,0,1,1,1,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,0,0,0,1,1,1,1,0,1,0,1,0,1,1,0,0,0,0,1,1,1, + 1,0,0,0,0,0,0,0,1,1,0,1,1,0,0,1,0,1,0,1,0,1,1,0,0,0,0,0,1,1,1,0,0,1,1,1,1,1,0,1,0,1,1,0,1, + 1,0,0,0,0,0,0,0,0,0,1,1,1,0,0,1,0,0,1,0,0,1,1,1,1,0,0,1,1,0,1,1,0,1,1,0,1,0,0,0,1,0,0,0,1, + 0,1,0,1,0,1,1,1,0,0,0,0,0,0,1,1,1,1,0,0,1,0,1,1,1,0,0,0,1,0,1,1,1,1,1,1,0,1,0,1,1,0,0,0,1, + 1,1,0,1,1,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,1,1,0,0,0,1,0,1,0,0,0,0,0,1,1,0, + 0,1,0,1,1,1,0,0,1,0,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,1,1,0,1,0,0,0,0,0,1,1,0,1,0 }; + _Total_fixed_length -= _Adjustment[_Ryu_exponent]; + // _Whole_digits doesn't need to be adjusted because these cases won't refer to it later. + } + } else if (_Whole_digits > 0) { // case "17.29" + _Total_fixed_length = __olength + 1; + } else { // case "0.001729" + _Total_fixed_length = static_cast<uint32_t>(2 - _Ryu_exponent); + } + + if (_Last - _First < static_cast<ptrdiff_t>(_Total_fixed_length)) { + return { _Last, errc::value_too_large }; + } + + char* _Mid; + if (_Ryu_exponent > 0) { // case "172900" + bool _Can_use_ryu; + + if (_Ryu_exponent > 22) { // 10^22 is the largest power of 10 that's exactly representable as a double. + _Can_use_ryu = false; + } else { + // Ryu generated X: __v.__mantissa * 10^_Ryu_exponent + // __v.__mantissa == 2^_Trailing_zero_bits * (__v.__mantissa >> _Trailing_zero_bits) + // 10^_Ryu_exponent == 2^_Ryu_exponent * 5^_Ryu_exponent + + // _Trailing_zero_bits is [0, 56] (aside: because 2^56 is the largest power of 2 + // with 17 decimal digits, which is double's round-trip limit.) + // _Ryu_exponent is [1, 22]. + // Normalization adds [2, 52] (aside: at least 2 because the pre-normalized mantissa is at least 5). + // This adds up to [3, 130], which is well below double's maximum binary exponent 1023. + + // Therefore, we just need to consider (__v.__mantissa >> _Trailing_zero_bits) * 5^_Ryu_exponent. + + // If that product would exceed 53 bits, then X can't be exactly represented as a double. + // (That's not a problem for round-tripping, because X is close enough to the original double, + // but X isn't mathematically equal to the original double.) This requires a high-precision fallback. + + // If the product is 53 bits or smaller, then X can be exactly represented as a double (and we don't + // need to re-synthesize it; the original double must have been X, because Ryu wouldn't produce the + // same output for two different doubles X and Y). This allows Ryu's output to be used (zero-filled). + + // (2^53 - 1) / 5^0 (for indexing), (2^53 - 1) / 5^1, ..., (2^53 - 1) / 5^22 + static constexpr uint64_t _Max_shifted_mantissa[23] = { + 9007199254740991u, 1801439850948198u, 360287970189639u, 72057594037927u, 14411518807585u, + 2882303761517u, 576460752303u, 115292150460u, 23058430092u, 4611686018u, 922337203u, 184467440u, + 36893488u, 7378697u, 1475739u, 295147u, 59029u, 11805u, 2361u, 472u, 94u, 18u, 3u }; + + unsigned long _Trailing_zero_bits; +#ifdef _LIBCPP_HAS_BITSCAN64 + (void) _BitScanForward64(&_Trailing_zero_bits, __v.__mantissa); // __v.__mantissa is guaranteed nonzero +#else // ^^^ 64-bit ^^^ / vvv 32-bit vvv + const uint32_t _Low_mantissa = static_cast<uint32_t>(__v.__mantissa); + if (_Low_mantissa != 0) { + (void) _BitScanForward(&_Trailing_zero_bits, _Low_mantissa); + } else { + const uint32_t _High_mantissa = static_cast<uint32_t>(__v.__mantissa >> 32); // nonzero here + (void) _BitScanForward(&_Trailing_zero_bits, _High_mantissa); + _Trailing_zero_bits += 32; + } +#endif // ^^^ 32-bit ^^^ + const uint64_t _Shifted_mantissa = __v.__mantissa >> _Trailing_zero_bits; + _Can_use_ryu = _Shifted_mantissa <= _Max_shifted_mantissa[_Ryu_exponent]; + } + + if (!_Can_use_ryu) { + // Print the integer exactly. + // Performance note: This will redundantly perform bounds checking. + // Performance note: This will redundantly decompose the IEEE representation. + return __d2fixed_buffered_n(_First, _Last, __f, 0); + } + + // _Can_use_ryu + // Print the decimal digits, left-aligned within [_First, _First + _Total_fixed_length). + _Mid = _First + __olength; + } else { // cases "1729", "17.29", and "0.001729" + // Print the decimal digits, right-aligned within [_First, _First + _Total_fixed_length). + _Mid = _First + _Total_fixed_length; + } + + // We prefer 32-bit operations, even on 64-bit platforms. + // We have at most 17 digits, and uint32_t can store 9 digits. + // If _Output doesn't fit into uint32_t, we cut off 8 digits, + // so the rest will fit into uint32_t. + if ((_Output >> 32) != 0) { + // Expensive 64-bit division. + const uint64_t __q = __div1e8(_Output); + uint32_t __output2 = static_cast<uint32_t>(_Output - 100000000 * __q); + _Output = __q; + + const uint32_t __c = __output2 % 10000; + __output2 /= 10000; + const uint32_t __d = __output2 % 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + const uint32_t __d0 = (__d % 100) << 1; + const uint32_t __d1 = (__d / 100) << 1; + + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c1, 2); + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __d0, 2); + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __d1, 2); + } + uint32_t __output2 = static_cast<uint32_t>(_Output); + while (__output2 >= 10000) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = __output2 - 10000 * (__output2 / 10000); +#else + const uint32_t __c = __output2 % 10000; +#endif + __output2 /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c1, 2); + } + if (__output2 >= 100) { + const uint32_t __c = (__output2 % 100) << 1; + __output2 /= 100; + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2); + } + if (__output2 >= 10) { + const uint32_t __c = __output2 << 1; + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2); + } else { + *--_Mid = static_cast<char>('0' + __output2); + } + + if (_Ryu_exponent > 0) { // case "172900" with _Can_use_ryu + // Performance note: it might be more efficient to do this immediately after setting _Mid. + _VSTD::memset(_First + __olength, '0', static_cast<size_t>(_Ryu_exponent)); + } else if (_Ryu_exponent == 0) { // case "1729" + // Done! + } else if (_Whole_digits > 0) { // case "17.29" + // Performance note: moving digits might not be optimal. + _VSTD::memmove(_First, _First + 1, static_cast<size_t>(_Whole_digits)); + _First[_Whole_digits] = '.'; + } else { // case "0.001729" + // Performance note: a larger memset() followed by overwriting '.' might be more efficient. + _First[0] = '0'; + _First[1] = '.'; + _VSTD::memset(_First + 2, '0', static_cast<size_t>(-_Whole_digits)); + } + + return { _First + _Total_fixed_length, errc{} }; + } + + const uint32_t _Total_scientific_length = __olength + (__olength > 1) // digits + possible decimal point + + (-100 < _Scientific_exponent && _Scientific_exponent < 100 ? 4 : 5); // + scientific exponent + if (_Last - _First < static_cast<ptrdiff_t>(_Total_scientific_length)) { + return { _Last, errc::value_too_large }; + } + char* const __result = _First; + + // Print the decimal digits. + uint32_t __i = 0; + // We prefer 32-bit operations, even on 64-bit platforms. + // We have at most 17 digits, and uint32_t can store 9 digits. + // If _Output doesn't fit into uint32_t, we cut off 8 digits, + // so the rest will fit into uint32_t. + if ((_Output >> 32) != 0) { + // Expensive 64-bit division. + const uint64_t __q = __div1e8(_Output); + uint32_t __output2 = static_cast<uint32_t>(_Output) - 100000000 * static_cast<uint32_t>(__q); + _Output = __q; + + const uint32_t __c = __output2 % 10000; + __output2 /= 10000; + const uint32_t __d = __output2 % 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + const uint32_t __d0 = (__d % 100) << 1; + const uint32_t __d1 = (__d / 100) << 1; + _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(__result + __olength - __i - 3, __DIGIT_TABLE + __c1, 2); + _VSTD::memcpy(__result + __olength - __i - 5, __DIGIT_TABLE + __d0, 2); + _VSTD::memcpy(__result + __olength - __i - 7, __DIGIT_TABLE + __d1, 2); + __i += 8; + } + uint32_t __output2 = static_cast<uint32_t>(_Output); + while (__output2 >= 10000) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = __output2 - 10000 * (__output2 / 10000); +#else + const uint32_t __c = __output2 % 10000; +#endif + __output2 /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(__result + __olength - __i - 3, __DIGIT_TABLE + __c1, 2); + __i += 4; + } + if (__output2 >= 100) { + const uint32_t __c = (__output2 % 100) << 1; + __output2 /= 100; + _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c, 2); + __i += 2; + } + if (__output2 >= 10) { + const uint32_t __c = __output2 << 1; + // We can't use memcpy here: the decimal dot goes between these two digits. + __result[2] = __DIGIT_TABLE[__c + 1]; + __result[0] = __DIGIT_TABLE[__c]; + } else { + __result[0] = static_cast<char>('0' + __output2); + } + + // Print decimal point if needed. + uint32_t __index; + if (__olength > 1) { + __result[1] = '.'; + __index = __olength + 1; + } else { + __index = 1; + } + + // Print the exponent. + __result[__index++] = 'e'; + if (_Scientific_exponent < 0) { + __result[__index++] = '-'; + _Scientific_exponent = -_Scientific_exponent; + } else { + __result[__index++] = '+'; + } + + if (_Scientific_exponent >= 100) { + const int32_t __c = _Scientific_exponent % 10; + _VSTD::memcpy(__result + __index, __DIGIT_TABLE + 2 * (_Scientific_exponent / 10), 2); + __result[__index + 2] = static_cast<char>('0' + __c); + __index += 3; + } else { + _VSTD::memcpy(__result + __index, __DIGIT_TABLE + 2 * _Scientific_exponent, 2); + __index += 2; + } + + return { _First + _Total_scientific_length, errc{} }; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __d2d_small_int(const uint64_t __ieeeMantissa, const uint32_t __ieeeExponent, + __floating_decimal_64* const __v) { + const uint64_t __m2 = (1ull << __DOUBLE_MANTISSA_BITS) | __ieeeMantissa; + const int32_t __e2 = static_cast<int32_t>(__ieeeExponent) - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; + + if (__e2 > 0) { + // f = __m2 * 2^__e2 >= 2^53 is an integer. + // Ignore this case for now. + return false; + } + + if (__e2 < -52) { + // f < 1. + return false; + } + + // Since 2^52 <= __m2 < 2^53 and 0 <= -__e2 <= 52: 1 <= f = __m2 / 2^-__e2 < 2^53. + // Test if the lower -__e2 bits of the significand are 0, i.e. whether the fraction is 0. + const uint64_t __mask = (1ull << -__e2) - 1; + const uint64_t __fraction = __m2 & __mask; + if (__fraction != 0) { + return false; + } + + // f is an integer in the range [1, 2^53). + // Note: __mantissa might contain trailing (decimal) 0's. + // Note: since 2^53 < 10^16, there is no need to adjust __decimalLength17(). + __v->__mantissa = __m2 >> -__e2; + __v->__exponent = 0; + return true; +} + +[[nodiscard]] to_chars_result __d2s_buffered_n(char* const _First, char* const _Last, const double __f, + const chars_format _Fmt) { + + // Step 1: Decode the floating-point number, and unify normalized and subnormal cases. + const uint64_t __bits = __double_to_bits(__f); + + // Case distinction; exit early for the easy cases. + if (__bits == 0) { + if (_Fmt == chars_format::scientific) { + if (_Last - _First < 5) { + return { _Last, errc::value_too_large }; + } + + _VSTD::memcpy(_First, "0e+00", 5); + + return { _First + 5, errc{} }; + } + + // Print "0" for chars_format::fixed, chars_format::general, and chars_format{}. + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + + *_First = '0'; + + return { _First + 1, errc{} }; + } + + // Decode __bits into mantissa and exponent. + const uint64_t __ieeeMantissa = __bits & ((1ull << __DOUBLE_MANTISSA_BITS) - 1); + const uint32_t __ieeeExponent = static_cast<uint32_t>(__bits >> __DOUBLE_MANTISSA_BITS); + + if (_Fmt == chars_format::fixed) { + // const uint64_t _Mantissa2 = __ieeeMantissa | (1ull << __DOUBLE_MANTISSA_BITS); // restore implicit bit + const int32_t _Exponent2 = static_cast<int32_t>(__ieeeExponent) + - __DOUBLE_BIAS - __DOUBLE_MANTISSA_BITS; // bias and normalization + + // Normal values are equal to _Mantissa2 * 2^_Exponent2. + // (Subnormals are different, but they'll be rejected by the _Exponent2 test here, so they can be ignored.) + + // For nonzero integers, _Exponent2 >= -52. (The minimum value occurs when _Mantissa2 * 2^_Exponent2 is 1. + // In that case, _Mantissa2 is the implicit 1 bit followed by 52 zeros, so _Exponent2 is -52 to shift away + // the zeros.) The dense range of exactly representable integers has negative or zero exponents + // (as positive exponents make the range non-dense). For that dense range, Ryu will always be used: + // every digit is necessary to uniquely identify the value, so Ryu must print them all. + + // Positive exponents are the non-dense range of exactly representable integers. This contains all of the values + // for which Ryu can't be used (and a few Ryu-friendly values). We can save time by detecting positive + // exponents here and skipping Ryu. Calling __d2fixed_buffered_n() with precision 0 is valid for all integers + // (so it's okay if we call it with a Ryu-friendly value). + if (_Exponent2 > 0) { + return __d2fixed_buffered_n(_First, _Last, __f, 0); + } + } + + __floating_decimal_64 __v; + const bool __isSmallInt = __d2d_small_int(__ieeeMantissa, __ieeeExponent, &__v); + if (__isSmallInt) { + // For small integers in the range [1, 2^53), __v.__mantissa might contain trailing (decimal) zeros. + // For scientific notation we need to move these zeros into the exponent. + // (This is not needed for fixed-point notation, so it might be beneficial to trim + // trailing zeros in __to_chars only if needed - once fixed-point notation output is implemented.) + for (;;) { + const uint64_t __q = __div10(__v.__mantissa); + const uint32_t __r = static_cast<uint32_t>(__v.__mantissa) - 10 * static_cast<uint32_t>(__q); + if (__r != 0) { + break; + } + __v.__mantissa = __q; + ++__v.__exponent; + } + } else { + __v = __d2d(__ieeeMantissa, __ieeeExponent); + } + + return __to_chars(_First, _Last, __v, _Fmt, __f); +} + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on diff --git a/libcxx/src/ryu/f2s.cpp b/libcxx/src/ryu/f2s.cpp new file mode 100644 index 000000000000..7e10b498367e --- /dev/null +++ b/libcxx/src/ryu/f2s.cpp @@ -0,0 +1,715 @@ +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// Copyright (c) Microsoft Corporation. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + +// Copyright 2018 Ulf Adams +// Copyright (c) Microsoft Corporation. All rights reserved. + +// Boost Software License - Version 1.0 - August 17th, 2003 + +// Permission is hereby granted, free of charge, to any person or organization +// obtaining a copy of the software and accompanying documentation covered by +// this license (the "Software") to use, reproduce, display, distribute, +// execute, and transmit the Software, and to prepare derivative works of the +// Software, and to permit third-parties to whom the Software is furnished to +// do so, all subject to the following: + +// The copyright notices in the Software and this entire statement, including +// the above license grant, this restriction and the following disclaimer, +// must be included in all copies of the Software, in whole or in part, and +// all derivative works of the Software, unless such copies or derivative +// works are solely in the form of machine-executable object code generated by +// a source language processor. + +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT +// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE +// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, +// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +// Avoid formatting to keep the changes with the original code minimal. +// clang-format off + +#include "__config" +#include "charconv" + +#include "include/ryu/common.h" +#include "include/ryu/d2fixed.h" +#include "include/ryu/d2s_intrinsics.h" +#include "include/ryu/digit_table.h" +#include "include/ryu/f2s.h" +#include "include/ryu/ryu.h" + +_LIBCPP_BEGIN_NAMESPACE_STD + +inline constexpr int __FLOAT_MANTISSA_BITS = 23; +inline constexpr int __FLOAT_EXPONENT_BITS = 8; +inline constexpr int __FLOAT_BIAS = 127; + +inline constexpr int __FLOAT_POW5_INV_BITCOUNT = 59; +inline constexpr uint64_t __FLOAT_POW5_INV_SPLIT[31] = { + 576460752303423489u, 461168601842738791u, 368934881474191033u, 295147905179352826u, + 472236648286964522u, 377789318629571618u, 302231454903657294u, 483570327845851670u, + 386856262276681336u, 309485009821345069u, 495176015714152110u, 396140812571321688u, + 316912650057057351u, 507060240091291761u, 405648192073033409u, 324518553658426727u, + 519229685853482763u, 415383748682786211u, 332306998946228969u, 531691198313966350u, + 425352958651173080u, 340282366920938464u, 544451787073501542u, 435561429658801234u, + 348449143727040987u, 557518629963265579u, 446014903970612463u, 356811923176489971u, + 570899077082383953u, 456719261665907162u, 365375409332725730u +}; +inline constexpr int __FLOAT_POW5_BITCOUNT = 61; +inline constexpr uint64_t __FLOAT_POW5_SPLIT[47] = { + 1152921504606846976u, 1441151880758558720u, 1801439850948198400u, 2251799813685248000u, + 1407374883553280000u, 1759218604441600000u, 2199023255552000000u, 1374389534720000000u, + 1717986918400000000u, 2147483648000000000u, 1342177280000000000u, 1677721600000000000u, + 2097152000000000000u, 1310720000000000000u, 1638400000000000000u, 2048000000000000000u, + 1280000000000000000u, 1600000000000000000u, 2000000000000000000u, 1250000000000000000u, + 1562500000000000000u, 1953125000000000000u, 1220703125000000000u, 1525878906250000000u, + 1907348632812500000u, 1192092895507812500u, 1490116119384765625u, 1862645149230957031u, + 1164153218269348144u, 1455191522836685180u, 1818989403545856475u, 2273736754432320594u, + 1421085471520200371u, 1776356839400250464u, 2220446049250313080u, 1387778780781445675u, + 1734723475976807094u, 2168404344971008868u, 1355252715606880542u, 1694065894508600678u, + 2117582368135750847u, 1323488980084844279u, 1654361225106055349u, 2067951531382569187u, + 1292469707114105741u, 1615587133892632177u, 2019483917365790221u +}; + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __pow5Factor(uint32_t __value) { + uint32_t __count = 0; + for (;;) { + _LIBCPP_ASSERT(__value != 0, ""); + const uint32_t __q = __value / 5; + const uint32_t __r = __value % 5; + if (__r != 0) { + break; + } + __value = __q; + ++__count; + } + return __count; +} + +// Returns true if __value is divisible by 5^__p. +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf5(const uint32_t __value, const uint32_t __p) { + return __pow5Factor(__value) >= __p; +} + +// Returns true if __value is divisible by 2^__p. +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline bool __multipleOfPowerOf2(const uint32_t __value, const uint32_t __p) { + _LIBCPP_ASSERT(__value != 0, ""); + _LIBCPP_ASSERT(__p < 32, ""); + // __builtin_ctz doesn't appear to be faster here. + return (__value & ((1u << __p) - 1)) == 0; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulShift(const uint32_t __m, const uint64_t __factor, const int32_t __shift) { + _LIBCPP_ASSERT(__shift > 32, ""); + + // The casts here help MSVC to avoid calls to the __allmul library + // function. + const uint32_t __factorLo = static_cast<uint32_t>(__factor); + const uint32_t __factorHi = static_cast<uint32_t>(__factor >> 32); + const uint64_t __bits0 = static_cast<uint64_t>(__m) * __factorLo; + const uint64_t __bits1 = static_cast<uint64_t>(__m) * __factorHi; + +#ifndef _LIBCPP_64_BIT + // On 32-bit platforms we can avoid a 64-bit shift-right since we only + // need the upper 32 bits of the result and the shift value is > 32. + const uint32_t __bits0Hi = static_cast<uint32_t>(__bits0 >> 32); + uint32_t __bits1Lo = static_cast<uint32_t>(__bits1); + uint32_t __bits1Hi = static_cast<uint32_t>(__bits1 >> 32); + __bits1Lo += __bits0Hi; + __bits1Hi += (__bits1Lo < __bits0Hi); + const int32_t __s = __shift - 32; + return (__bits1Hi << (32 - __s)) | (__bits1Lo >> __s); +#else // ^^^ 32-bit ^^^ / vvv 64-bit vvv + const uint64_t __sum = (__bits0 >> 32) + __bits1; + const uint64_t __shiftedSum = __sum >> (__shift - 32); + _LIBCPP_ASSERT(__shiftedSum <= UINT32_MAX, ""); + return static_cast<uint32_t>(__shiftedSum); +#endif // ^^^ 64-bit ^^^ +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulPow5InvDivPow2(const uint32_t __m, const uint32_t __q, const int32_t __j) { + return __mulShift(__m, __FLOAT_POW5_INV_SPLIT[__q], __j); +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline uint32_t __mulPow5divPow2(const uint32_t __m, const uint32_t __i, const int32_t __j) { + return __mulShift(__m, __FLOAT_POW5_SPLIT[__i], __j); +} + +// A floating decimal representing m * 10^e. +struct __floating_decimal_32 { + uint32_t __mantissa; + int32_t __exponent; +}; + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline __floating_decimal_32 __f2d(const uint32_t __ieeeMantissa, const uint32_t __ieeeExponent) { + int32_t __e2; + uint32_t __m2; + if (__ieeeExponent == 0) { + // We subtract 2 so that the bounds computation has 2 additional bits. + __e2 = 1 - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS - 2; + __m2 = __ieeeMantissa; + } else { + __e2 = static_cast<int32_t>(__ieeeExponent) - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS - 2; + __m2 = (1u << __FLOAT_MANTISSA_BITS) | __ieeeMantissa; + } + const bool __even = (__m2 & 1) == 0; + const bool __acceptBounds = __even; + + // Step 2: Determine the interval of valid decimal representations. + const uint32_t __mv = 4 * __m2; + const uint32_t __mp = 4 * __m2 + 2; + // Implicit bool -> int conversion. True is 1, false is 0. + const uint32_t __mmShift = __ieeeMantissa != 0 || __ieeeExponent <= 1; + const uint32_t __mm = 4 * __m2 - 1 - __mmShift; + + // Step 3: Convert to a decimal power base using 64-bit arithmetic. + uint32_t __vr, __vp, __vm; + int32_t __e10; + bool __vmIsTrailingZeros = false; + bool __vrIsTrailingZeros = false; + uint8_t __lastRemovedDigit = 0; + if (__e2 >= 0) { + const uint32_t __q = __log10Pow2(__e2); + __e10 = static_cast<int32_t>(__q); + const int32_t __k = __FLOAT_POW5_INV_BITCOUNT + __pow5bits(static_cast<int32_t>(__q)) - 1; + const int32_t __i = -__e2 + static_cast<int32_t>(__q) + __k; + __vr = __mulPow5InvDivPow2(__mv, __q, __i); + __vp = __mulPow5InvDivPow2(__mp, __q, __i); + __vm = __mulPow5InvDivPow2(__mm, __q, __i); + if (__q != 0 && (__vp - 1) / 10 <= __vm / 10) { + // We need to know one removed digit even if we are not going to loop below. We could use + // __q = X - 1 above, except that would require 33 bits for the result, and we've found that + // 32-bit arithmetic is faster even on 64-bit machines. + const int32_t __l = __FLOAT_POW5_INV_BITCOUNT + __pow5bits(static_cast<int32_t>(__q - 1)) - 1; + __lastRemovedDigit = static_cast<uint8_t>(__mulPow5InvDivPow2(__mv, __q - 1, + -__e2 + static_cast<int32_t>(__q) - 1 + __l) % 10); + } + if (__q <= 9) { + // The largest power of 5 that fits in 24 bits is 5^10, but __q <= 9 seems to be safe as well. + // Only one of __mp, __mv, and __mm can be a multiple of 5, if any. + if (__mv % 5 == 0) { + __vrIsTrailingZeros = __multipleOfPowerOf5(__mv, __q); + } else if (__acceptBounds) { + __vmIsTrailingZeros = __multipleOfPowerOf5(__mm, __q); + } else { + __vp -= __multipleOfPowerOf5(__mp, __q); + } + } + } else { + const uint32_t __q = __log10Pow5(-__e2); + __e10 = static_cast<int32_t>(__q) + __e2; + const int32_t __i = -__e2 - static_cast<int32_t>(__q); + const int32_t __k = __pow5bits(__i) - __FLOAT_POW5_BITCOUNT; + int32_t __j = static_cast<int32_t>(__q) - __k; + __vr = __mulPow5divPow2(__mv, static_cast<uint32_t>(__i), __j); + __vp = __mulPow5divPow2(__mp, static_cast<uint32_t>(__i), __j); + __vm = __mulPow5divPow2(__mm, static_cast<uint32_t>(__i), __j); + if (__q != 0 && (__vp - 1) / 10 <= __vm / 10) { + __j = static_cast<int32_t>(__q) - 1 - (__pow5bits(__i + 1) - __FLOAT_POW5_BITCOUNT); + __lastRemovedDigit = static_cast<uint8_t>(__mulPow5divPow2(__mv, static_cast<uint32_t>(__i + 1), __j) % 10); + } + if (__q <= 1) { + // {__vr,__vp,__vm} is trailing zeros if {__mv,__mp,__mm} has at least __q trailing 0 bits. + // __mv = 4 * __m2, so it always has at least two trailing 0 bits. + __vrIsTrailingZeros = true; + if (__acceptBounds) { + // __mm = __mv - 1 - __mmShift, so it has 1 trailing 0 bit iff __mmShift == 1. + __vmIsTrailingZeros = __mmShift == 1; + } else { + // __mp = __mv + 2, so it always has at least one trailing 0 bit. + --__vp; + } + } else if (__q < 31) { // TRANSITION(ulfjack): Use a tighter bound here. + __vrIsTrailingZeros = __multipleOfPowerOf2(__mv, __q - 1); + } + } + + // Step 4: Find the shortest decimal representation in the interval of valid representations. + int32_t __removed = 0; + uint32_t _Output; + if (__vmIsTrailingZeros || __vrIsTrailingZeros) { + // General case, which happens rarely (~4.0%). + while (__vp / 10 > __vm / 10) { +#ifdef __clang__ // TRANSITION, LLVM-23106 + __vmIsTrailingZeros &= __vm - (__vm / 10) * 10 == 0; +#else + __vmIsTrailingZeros &= __vm % 10 == 0; +#endif + __vrIsTrailingZeros &= __lastRemovedDigit == 0; + __lastRemovedDigit = static_cast<uint8_t>(__vr % 10); + __vr /= 10; + __vp /= 10; + __vm /= 10; + ++__removed; + } + if (__vmIsTrailingZeros) { + while (__vm % 10 == 0) { + __vrIsTrailingZeros &= __lastRemovedDigit == 0; + __lastRemovedDigit = static_cast<uint8_t>(__vr % 10); + __vr /= 10; + __vp /= 10; + __vm /= 10; + ++__removed; + } + } + if (__vrIsTrailingZeros && __lastRemovedDigit == 5 && __vr % 2 == 0) { + // Round even if the exact number is .....50..0. + __lastRemovedDigit = 4; + } + // We need to take __vr + 1 if __vr is outside bounds or we need to round up. + _Output = __vr + ((__vr == __vm && (!__acceptBounds || !__vmIsTrailingZeros)) || __lastRemovedDigit >= 5); + } else { + // Specialized for the common case (~96.0%). Percentages below are relative to this. + // Loop iterations below (approximately): + // 0: 13.6%, 1: 70.7%, 2: 14.1%, 3: 1.39%, 4: 0.14%, 5+: 0.01% + while (__vp / 10 > __vm / 10) { + __lastRemovedDigit = static_cast<uint8_t>(__vr % 10); + __vr /= 10; + __vp /= 10; + __vm /= 10; + ++__removed; + } + // We need to take __vr + 1 if __vr is outside bounds or we need to round up. + _Output = __vr + (__vr == __vm || __lastRemovedDigit >= 5); + } + const int32_t __exp = __e10 + __removed; + + __floating_decimal_32 __fd; + __fd.__exponent = __exp; + __fd.__mantissa = _Output; + return __fd; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline to_chars_result _Large_integer_to_chars(char* const _First, char* const _Last, + const uint32_t _Mantissa2, const int32_t _Exponent2) { + + // Print the integer _Mantissa2 * 2^_Exponent2 exactly. + + // For nonzero integers, _Exponent2 >= -23. (The minimum value occurs when _Mantissa2 * 2^_Exponent2 is 1. + // In that case, _Mantissa2 is the implicit 1 bit followed by 23 zeros, so _Exponent2 is -23 to shift away + // the zeros.) The dense range of exactly representable integers has negative or zero exponents + // (as positive exponents make the range non-dense). For that dense range, Ryu will always be used: + // every digit is necessary to uniquely identify the value, so Ryu must print them all. + + // Positive exponents are the non-dense range of exactly representable integers. + // This contains all of the values for which Ryu can't be used (and a few Ryu-friendly values). + + // Performance note: Long division appears to be faster than losslessly widening float to double and calling + // __d2fixed_buffered_n(). If __f2fixed_buffered_n() is implemented, it might be faster than long division. + + _LIBCPP_ASSERT(_Exponent2 > 0, ""); + _LIBCPP_ASSERT(_Exponent2 <= 104, ""); // because __ieeeExponent <= 254 + + // Manually represent _Mantissa2 * 2^_Exponent2 as a large integer. _Mantissa2 is always 24 bits + // (due to the implicit bit), while _Exponent2 indicates a shift of at most 104 bits. + // 24 + 104 equals 128 equals 4 * 32, so we need exactly 4 32-bit elements. + // We use a little-endian representation, visualized like this: + + // << left shift << + // most significant + // _Data[3] _Data[2] _Data[1] _Data[0] + // least significant + // >> right shift >> + + constexpr uint32_t _Data_size = 4; + uint32_t _Data[_Data_size]{}; + + // _Maxidx is the index of the most significant nonzero element. + uint32_t _Maxidx = ((24 + static_cast<uint32_t>(_Exponent2) + 31) / 32) - 1; + _LIBCPP_ASSERT(_Maxidx < _Data_size, ""); + + const uint32_t _Bit_shift = static_cast<uint32_t>(_Exponent2) % 32; + if (_Bit_shift <= 8) { // _Mantissa2's 24 bits don't cross an element boundary + _Data[_Maxidx] = _Mantissa2 << _Bit_shift; + } else { // _Mantissa2's 24 bits cross an element boundary + _Data[_Maxidx - 1] = _Mantissa2 << _Bit_shift; + _Data[_Maxidx] = _Mantissa2 >> (32 - _Bit_shift); + } + + // If Ryu hasn't determined the total output length, we need to buffer the digits generated from right to left + // by long division. The largest possible float is: 340'282346638'528859811'704183484'516925440 + uint32_t _Blocks[4]; + int32_t _Filled_blocks = 0; + // From left to right, we're going to print: + // _Data[0] will be [1, 10] digits. + // Then if _Filled_blocks > 0: + // _Blocks[_Filled_blocks - 1], ..., _Blocks[0] will be 0-filled 9-digit blocks. + + if (_Maxidx != 0) { // If the integer is actually large, perform long division. + // Otherwise, skip to printing _Data[0]. + for (;;) { + // Loop invariant: _Maxidx != 0 (i.e. the integer is actually large) + + const uint32_t _Most_significant_elem = _Data[_Maxidx]; + const uint32_t _Initial_remainder = _Most_significant_elem % 1000000000; + const uint32_t _Initial_quotient = _Most_significant_elem / 1000000000; + _Data[_Maxidx] = _Initial_quotient; + uint64_t _Remainder = _Initial_remainder; + + // Process less significant elements. + uint32_t _Idx = _Maxidx; + do { + --_Idx; // Initially, _Remainder is at most 10^9 - 1. + + // Now, _Remainder is at most (10^9 - 1) * 2^32 + 2^32 - 1, simplified to 10^9 * 2^32 - 1. + _Remainder = (_Remainder << 32) | _Data[_Idx]; + + // floor((10^9 * 2^32 - 1) / 10^9) == 2^32 - 1, so uint32_t _Quotient is lossless. + const uint32_t _Quotient = static_cast<uint32_t>(__div1e9(_Remainder)); + + // _Remainder is at most 10^9 - 1 again. + // For uint32_t truncation, see the __mod1e9() comment in d2s_intrinsics.h. + _Remainder = static_cast<uint32_t>(_Remainder) - 1000000000u * _Quotient; + + _Data[_Idx] = _Quotient; + } while (_Idx != 0); + + // Store a 0-filled 9-digit block. + _Blocks[_Filled_blocks++] = static_cast<uint32_t>(_Remainder); + + if (_Initial_quotient == 0) { // Is the large integer shrinking? + --_Maxidx; // log2(10^9) is 29.9, so we can't shrink by more than one element. + if (_Maxidx == 0) { + break; // We've finished long division. Now we need to print _Data[0]. + } + } + } + } + + _LIBCPP_ASSERT(_Data[0] != 0, ""); + for (uint32_t _Idx = 1; _Idx < _Data_size; ++_Idx) { + _LIBCPP_ASSERT(_Data[_Idx] == 0, ""); + } + + const uint32_t _Data_olength = _Data[0] >= 1000000000 ? 10 : __decimalLength9(_Data[0]); + const uint32_t _Total_fixed_length = _Data_olength + 9 * _Filled_blocks; + + if (_Last - _First < static_cast<ptrdiff_t>(_Total_fixed_length)) { + return { _Last, errc::value_too_large }; + } + + char* _Result = _First; + + // Print _Data[0]. While it's up to 10 digits, + // which is more than Ryu generates, the code below can handle this. + __append_n_digits(_Data_olength, _Data[0], _Result); + _Result += _Data_olength; + + // Print 0-filled 9-digit blocks. + for (int32_t _Idx = _Filled_blocks - 1; _Idx >= 0; --_Idx) { + __append_nine_digits(_Blocks[_Idx], _Result); + _Result += 9; + } + + return { _Result, errc{} }; +} + +[[nodiscard]] _LIBCPP_HIDE_FROM_ABI inline to_chars_result __to_chars(char* const _First, char* const _Last, const __floating_decimal_32 __v, + chars_format _Fmt, const uint32_t __ieeeMantissa, const uint32_t __ieeeExponent) { + // Step 5: Print the decimal representation. + uint32_t _Output = __v.__mantissa; + int32_t _Ryu_exponent = __v.__exponent; + const uint32_t __olength = __decimalLength9(_Output); + int32_t _Scientific_exponent = _Ryu_exponent + static_cast<int32_t>(__olength) - 1; + + if (_Fmt == chars_format{}) { + int32_t _Lower; + int32_t _Upper; + + if (__olength == 1) { + // Value | Fixed | Scientific + // 1e-3 | "0.001" | "1e-03" + // 1e4 | "10000" | "1e+04" + _Lower = -3; + _Upper = 4; + } else { + // Value | Fixed | Scientific + // 1234e-7 | "0.0001234" | "1.234e-04" + // 1234e5 | "123400000" | "1.234e+08" + _Lower = -static_cast<int32_t>(__olength + 3); + _Upper = 5; + } + + if (_Lower <= _Ryu_exponent && _Ryu_exponent <= _Upper) { + _Fmt = chars_format::fixed; + } else { + _Fmt = chars_format::scientific; + } + } else if (_Fmt == chars_format::general) { + // C11 7.21.6.1 "The fprintf function"/8: + // "Let P equal [...] 6 if the precision is omitted [...]. + // Then, if a conversion with style E would have an exponent of X: + // - if P > X >= -4, the conversion is with style f [...]. + // - otherwise, the conversion is with style e [...]." + if (-4 <= _Scientific_exponent && _Scientific_exponent < 6) { + _Fmt = chars_format::fixed; + } else { + _Fmt = chars_format::scientific; + } + } + + if (_Fmt == chars_format::fixed) { + // Example: _Output == 1729, __olength == 4 + + // _Ryu_exponent | Printed | _Whole_digits | _Total_fixed_length | Notes + // --------------|----------|---------------|----------------------|--------------------------------------- + // 2 | 172900 | 6 | _Whole_digits | Ryu can't be used for printing + // 1 | 17290 | 5 | (sometimes adjusted) | when the trimmed digits are nonzero. + // --------------|----------|---------------|----------------------|--------------------------------------- + // 0 | 1729 | 4 | _Whole_digits | Unified length cases. + // --------------|----------|---------------|----------------------|--------------------------------------- + // -1 | 172.9 | 3 | __olength + 1 | This case can't happen for + // -2 | 17.29 | 2 | | __olength == 1, but no additional + // -3 | 1.729 | 1 | | code is needed to avoid it. + // --------------|----------|---------------|----------------------|--------------------------------------- + // -4 | 0.1729 | 0 | 2 - _Ryu_exponent | C11 7.21.6.1 "The fprintf function"/8: + // -5 | 0.01729 | -1 | | "If a decimal-point character appears, + // -6 | 0.001729 | -2 | | at least one digit appears before it." + + const int32_t _Whole_digits = static_cast<int32_t>(__olength) + _Ryu_exponent; + + uint32_t _Total_fixed_length; + if (_Ryu_exponent >= 0) { // cases "172900" and "1729" + _Total_fixed_length = static_cast<uint32_t>(_Whole_digits); + if (_Output == 1) { + // Rounding can affect the number of digits. + // For example, 1e11f is exactly "99999997952" which is 11 digits instead of 12. + // We can use a lookup table to detect this and adjust the total length. + static constexpr uint8_t _Adjustment[39] = { + 0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,1,0,1,1,1,0,0,1,1,0,1,0,1,1,0,0,1,0,1,1,0,1,1,1 }; + _Total_fixed_length -= _Adjustment[_Ryu_exponent]; + // _Whole_digits doesn't need to be adjusted because these cases won't refer to it later. + } + } else if (_Whole_digits > 0) { // case "17.29" + _Total_fixed_length = __olength + 1; + } else { // case "0.001729" + _Total_fixed_length = static_cast<uint32_t>(2 - _Ryu_exponent); + } + + if (_Last - _First < static_cast<ptrdiff_t>(_Total_fixed_length)) { + return { _Last, errc::value_too_large }; + } + + char* _Mid; + if (_Ryu_exponent > 0) { // case "172900" + bool _Can_use_ryu; + + if (_Ryu_exponent > 10) { // 10^10 is the largest power of 10 that's exactly representable as a float. + _Can_use_ryu = false; + } else { + // Ryu generated X: __v.__mantissa * 10^_Ryu_exponent + // __v.__mantissa == 2^_Trailing_zero_bits * (__v.__mantissa >> _Trailing_zero_bits) + // 10^_Ryu_exponent == 2^_Ryu_exponent * 5^_Ryu_exponent + + // _Trailing_zero_bits is [0, 29] (aside: because 2^29 is the largest power of 2 + // with 9 decimal digits, which is float's round-trip limit.) + // _Ryu_exponent is [1, 10]. + // Normalization adds [2, 23] (aside: at least 2 because the pre-normalized mantissa is at least 5). + // This adds up to [3, 62], which is well below float's maximum binary exponent 127. + + // Therefore, we just need to consider (__v.__mantissa >> _Trailing_zero_bits) * 5^_Ryu_exponent. + + // If that product would exceed 24 bits, then X can't be exactly represented as a float. + // (That's not a problem for round-tripping, because X is close enough to the original float, + // but X isn't mathematically equal to the original float.) This requires a high-precision fallback. + + // If the product is 24 bits or smaller, then X can be exactly represented as a float (and we don't + // need to re-synthesize it; the original float must have been X, because Ryu wouldn't produce the + // same output for two different floats X and Y). This allows Ryu's output to be used (zero-filled). + + // (2^24 - 1) / 5^0 (for indexing), (2^24 - 1) / 5^1, ..., (2^24 - 1) / 5^10 + static constexpr uint32_t _Max_shifted_mantissa[11] = { + 16777215, 3355443, 671088, 134217, 26843, 5368, 1073, 214, 42, 8, 1 }; + + unsigned long _Trailing_zero_bits; + (void) _BitScanForward(&_Trailing_zero_bits, __v.__mantissa); // __v.__mantissa is guaranteed nonzero + const uint32_t _Shifted_mantissa = __v.__mantissa >> _Trailing_zero_bits; + _Can_use_ryu = _Shifted_mantissa <= _Max_shifted_mantissa[_Ryu_exponent]; + } + + if (!_Can_use_ryu) { + const uint32_t _Mantissa2 = __ieeeMantissa | (1u << __FLOAT_MANTISSA_BITS); // restore implicit bit + const int32_t _Exponent2 = static_cast<int32_t>(__ieeeExponent) + - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS; // bias and normalization + + // Performance note: We've already called Ryu, so this will redundantly perform buffering and bounds checking. + return _Large_integer_to_chars(_First, _Last, _Mantissa2, _Exponent2); + } + + // _Can_use_ryu + // Print the decimal digits, left-aligned within [_First, _First + _Total_fixed_length). + _Mid = _First + __olength; + } else { // cases "1729", "17.29", and "0.001729" + // Print the decimal digits, right-aligned within [_First, _First + _Total_fixed_length). + _Mid = _First + _Total_fixed_length; + } + + while (_Output >= 10000) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = _Output - 10000 * (_Output / 10000); +#else + const uint32_t __c = _Output % 10000; +#endif + _Output /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c1, 2); + } + if (_Output >= 100) { + const uint32_t __c = (_Output % 100) << 1; + _Output /= 100; + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2); + } + if (_Output >= 10) { + const uint32_t __c = _Output << 1; + _VSTD::memcpy(_Mid -= 2, __DIGIT_TABLE + __c, 2); + } else { + *--_Mid = static_cast<char>('0' + _Output); + } + + if (_Ryu_exponent > 0) { // case "172900" with _Can_use_ryu + // Performance note: it might be more efficient to do this immediately after setting _Mid. + _VSTD::memset(_First + __olength, '0', static_cast<size_t>(_Ryu_exponent)); + } else if (_Ryu_exponent == 0) { // case "1729" + // Done! + } else if (_Whole_digits > 0) { // case "17.29" + // Performance note: moving digits might not be optimal. + _VSTD::memmove(_First, _First + 1, static_cast<size_t>(_Whole_digits)); + _First[_Whole_digits] = '.'; + } else { // case "0.001729" + // Performance note: a larger memset() followed by overwriting '.' might be more efficient. + _First[0] = '0'; + _First[1] = '.'; + _VSTD::memset(_First + 2, '0', static_cast<size_t>(-_Whole_digits)); + } + + return { _First + _Total_fixed_length, errc{} }; + } + + const uint32_t _Total_scientific_length = + __olength + (__olength > 1) + 4; // digits + possible decimal point + scientific exponent + if (_Last - _First < static_cast<ptrdiff_t>(_Total_scientific_length)) { + return { _Last, errc::value_too_large }; + } + char* const __result = _First; + + // Print the decimal digits. + uint32_t __i = 0; + while (_Output >= 10000) { +#ifdef __clang__ // TRANSITION, LLVM-38217 + const uint32_t __c = _Output - 10000 * (_Output / 10000); +#else + const uint32_t __c = _Output % 10000; +#endif + _Output /= 10000; + const uint32_t __c0 = (__c % 100) << 1; + const uint32_t __c1 = (__c / 100) << 1; + _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c0, 2); + _VSTD::memcpy(__result + __olength - __i - 3, __DIGIT_TABLE + __c1, 2); + __i += 4; + } + if (_Output >= 100) { + const uint32_t __c = (_Output % 100) << 1; + _Output /= 100; + _VSTD::memcpy(__result + __olength - __i - 1, __DIGIT_TABLE + __c, 2); + __i += 2; + } + if (_Output >= 10) { + const uint32_t __c = _Output << 1; + // We can't use memcpy here: the decimal dot goes between these two digits. + __result[2] = __DIGIT_TABLE[__c + 1]; + __result[0] = __DIGIT_TABLE[__c]; + } else { + __result[0] = static_cast<char>('0' + _Output); + } + + // Print decimal point if needed. + uint32_t __index; + if (__olength > 1) { + __result[1] = '.'; + __index = __olength + 1; + } else { + __index = 1; + } + + // Print the exponent. + __result[__index++] = 'e'; + if (_Scientific_exponent < 0) { + __result[__index++] = '-'; + _Scientific_exponent = -_Scientific_exponent; + } else { + __result[__index++] = '+'; + } + + _VSTD::memcpy(__result + __index, __DIGIT_TABLE + 2 * _Scientific_exponent, 2); + __index += 2; + + return { _First + _Total_scientific_length, errc{} }; +} + +[[nodiscard]] to_chars_result __f2s_buffered_n(char* const _First, char* const _Last, const float __f, + const chars_format _Fmt) { + + // Step 1: Decode the floating-point number, and unify normalized and subnormal cases. + const uint32_t __bits = __float_to_bits(__f); + + // Case distinction; exit early for the easy cases. + if (__bits == 0) { + if (_Fmt == chars_format::scientific) { + if (_Last - _First < 5) { + return { _Last, errc::value_too_large }; + } + + _VSTD::memcpy(_First, "0e+00", 5); + + return { _First + 5, errc{} }; + } + + // Print "0" for chars_format::fixed, chars_format::general, and chars_format{}. + if (_First == _Last) { + return { _Last, errc::value_too_large }; + } + + *_First = '0'; + + return { _First + 1, errc{} }; + } + + // Decode __bits into mantissa and exponent. + const uint32_t __ieeeMantissa = __bits & ((1u << __FLOAT_MANTISSA_BITS) - 1); + const uint32_t __ieeeExponent = __bits >> __FLOAT_MANTISSA_BITS; + + // When _Fmt == chars_format::fixed and the floating-point number is a large integer, + // it's faster to skip Ryu and immediately print the integer exactly. + if (_Fmt == chars_format::fixed) { + const uint32_t _Mantissa2 = __ieeeMantissa | (1u << __FLOAT_MANTISSA_BITS); // restore implicit bit + const int32_t _Exponent2 = static_cast<int32_t>(__ieeeExponent) + - __FLOAT_BIAS - __FLOAT_MANTISSA_BITS; // bias and normalization + + // Normal values are equal to _Mantissa2 * 2^_Exponent2. + // (Subnormals are different, but they'll be rejected by the _Exponent2 test here, so they can be ignored.) + + if (_Exponent2 > 0) { + return _Large_integer_to_chars(_First, _Last, _Mantissa2, _Exponent2); + } + } + + const __floating_decimal_32 __v = __f2d(__ieeeMantissa, __ieeeExponent); + return __to_chars(_First, _Last, __v, _Fmt, __ieeeMantissa, __ieeeExponent); +} + +_LIBCPP_END_NAMESPACE_STD + +// clang-format on |