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//===- WindowsSupport.h - Common Windows Include File -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines things specific to Windows implementations. In addition to
// providing some helpers for working with win32 APIs, this header wraps
// <windows.h> with some portability macros. Always include WindowsSupport.h
// instead of including <windows.h> directly.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only generic Win32 code that
//=== is guaranteed to work on *all* Win32 variants.
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_WINDOWSSUPPORT_H
#define LLVM_SUPPORT_WINDOWSSUPPORT_H
// mingw-w64 tends to define it as 0x0502 in its headers.
#undef _WIN32_WINNT
#undef _WIN32_IE
// Require at least Windows 7 API.
#define _WIN32_WINNT 0x0601
#define _WIN32_IE 0x0800 // MinGW at it again. FIXME: verify if still needed.
#define WIN32_LEAN_AND_MEAN
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/config.h" // Get build system configuration settings
#include "llvm/Support/Compiler.h"
#include <system_error>
#include <windows.h>
#include <wincrypt.h>
#include <cassert>
#include <string>
#include <vector>
#if !defined(__CYGWIN__) && !defined(__MINGW32__)
#include <VersionHelpers.h>
#else
// Cygwin does not have the IsWindows8OrGreater() API.
// Some version of mingw does not have the API either.
inline bool IsWindows8OrGreater() {
OSVERSIONINFO osvi = {};
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (!::GetVersionEx(&osvi))
return false;
return (osvi.dwMajorVersion > 6 ||
(osvi.dwMajorVersion == 6 && osvi.dwMinorVersion >= 2));
}
#endif // __CYGWIN__
inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
if (!ErrMsg)
return true;
char *buffer = NULL;
DWORD LastError = GetLastError();
DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_MAX_WIDTH_MASK,
NULL, LastError, 0, (LPSTR)&buffer, 1, NULL);
if (R)
*ErrMsg = prefix + ": " + buffer;
else
*ErrMsg = prefix + ": Unknown error";
*ErrMsg += " (0x" + llvm::utohexstr(LastError) + ")";
LocalFree(buffer);
return R != 0;
}
template <typename HandleTraits>
class ScopedHandle {
typedef typename HandleTraits::handle_type handle_type;
handle_type Handle;
ScopedHandle(const ScopedHandle &other); // = delete;
void operator=(const ScopedHandle &other); // = delete;
public:
ScopedHandle()
: Handle(HandleTraits::GetInvalid()) {}
explicit ScopedHandle(handle_type h)
: Handle(h) {}
~ScopedHandle() {
if (HandleTraits::IsValid(Handle))
HandleTraits::Close(Handle);
}
handle_type take() {
handle_type t = Handle;
Handle = HandleTraits::GetInvalid();
return t;
}
ScopedHandle &operator=(handle_type h) {
if (HandleTraits::IsValid(Handle))
HandleTraits::Close(Handle);
Handle = h;
return *this;
}
// True if Handle is valid.
explicit operator bool() const {
return HandleTraits::IsValid(Handle) ? true : false;
}
operator handle_type() const {
return Handle;
}
};
struct CommonHandleTraits {
typedef HANDLE handle_type;
static handle_type GetInvalid() {
return INVALID_HANDLE_VALUE;
}
static void Close(handle_type h) {
::CloseHandle(h);
}
static bool IsValid(handle_type h) {
return h != GetInvalid();
}
};
struct JobHandleTraits : CommonHandleTraits {
static handle_type GetInvalid() {
return NULL;
}
};
struct CryptContextTraits : CommonHandleTraits {
typedef HCRYPTPROV handle_type;
static handle_type GetInvalid() {
return 0;
}
static void Close(handle_type h) {
::CryptReleaseContext(h, 0);
}
static bool IsValid(handle_type h) {
return h != GetInvalid();
}
};
struct FindHandleTraits : CommonHandleTraits {
static void Close(handle_type h) {
::FindClose(h);
}
};
struct FileHandleTraits : CommonHandleTraits {};
typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
typedef ScopedHandle<FileHandleTraits> ScopedFileHandle;
typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
typedef ScopedHandle<FindHandleTraits> ScopedFindHandle;
typedef ScopedHandle<JobHandleTraits> ScopedJobHandle;
namespace llvm {
template <class T>
class SmallVectorImpl;
template <class T>
typename SmallVectorImpl<T>::const_pointer
c_str(SmallVectorImpl<T> &str) {
str.push_back(0);
str.pop_back();
return str.data();
}
namespace sys {
namespace path {
std::error_code widenPath(const Twine &Path8,
SmallVectorImpl<wchar_t> &Path16);
} // end namespace path
namespace windows {
std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
SmallVectorImpl<char> &utf8);
/// Convert from UTF16 to the current code page used in the system
std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
SmallVectorImpl<char> &utf8);
} // end namespace windows
} // end namespace sys
} // end namespace llvm.
#endif
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