diff options
Diffstat (limited to 'contrib/tcl/changes')
-rw-r--r-- | contrib/tcl/changes | 921 |
1 files changed, 918 insertions, 3 deletions
diff --git a/contrib/tcl/changes b/contrib/tcl/changes index 1eaf9e6ef946..9390e86a0649 100644 --- a/contrib/tcl/changes +++ b/contrib/tcl/changes @@ -1,6 +1,6 @@ Recent user-visible changes to Tcl: -SCCS: @(#) changes 1.142 96/08/01 17:00:22 +SCCS: @(#) changes 1.251 97/06/30 08:48:28 1. No more [command1] [command2] construct for grouping multiple commands on a single command line. @@ -128,7 +128,7 @@ Tcl_Eval. that came after version 3.3 was released. 40. 5/17/91 Changed tests to conform to Mary Ann May-Pumphrey's approach. - + 41. 5/23/91 Massive revision to Tcl parser to simplify the implementation of string and floating-point support in expressions. Newlines inside [] are now treated as command separators rather than word separators @@ -1322,7 +1322,7 @@ no longer shared between interpreters: a file cannot normally be referenced in one interpreter if it was opened in another. This feature is needed to support safe interpreters. Added Tcl_ShareHandle() procedure for allowing files to be shared, and added "interp" argument -to Tcl_FilePermissions procedure. +to Tcl_FilePermissions procedure. (JL) *** POTENTIAL INCOMPATIBILITY *** 9/11/95 (new feature) Added "AssocData" mechanism, whereby extensions @@ -2179,3 +2179,918 @@ finished. The bug was reported by John Loverso and Steven Wahl, independently, test case supplied by John Loverso. (JL) ----------------- Released patch 7.5p1, 8/2/96 ----------------------- + +5/8/96 (new feature) Added Tcl_GetChannelMode C API for retrieving whether +a channel is open for reading and writing. (JL) + +5/8/96 (API changes) Revised C APIs for channel drivers: + - Removed all Tcl_Files from channel driver interface; you can now have + channels that are not based on Tcl_Files. + - Added channelReadyProc and watchChannelProc procedures to interface; + these are used to implement event notification for channels. + - Added getFileProc to channel driver, to allow the generic IO code + to retrieve a Tcl_File from a channel (presumably if the channel + uses Tcl_Files they will be stored inside its instanceData). (JL) +*** INCOMPATIBILITY with Tcl 7.5 *** + +5/8/96 (API change) The Tcl_CreateChannel C API was modified to not take +Tcl_File arguments, and instead to take a mask specifying whether the +channel is readable and/or writable. (JL) +*** INCOMPATIBILITY with Tcl 7.5 *** + +6/3/96 (bug fix) Made Tcl_SetVar2 robust against the case where the value +of the variable is a NULL pointer instead of "". (JL) + +6/17/96 (bug fix) Fixed "reading uninitialized memory" error reported by +Purify, in Tcl_Preserve/Tcl_Release. (JL) + +8/9/96 (bug fix) Fixed bug in init.tcl that caused incorrect error message +if the act of autoloading a procedure caused the procedure to be invoked +again. (JO) + +8/9/96 (bug fix) Configure script produced bad library names and extensions +under SunOS and a few other platforms if the --disable-load switch was used. +(JO) + +8/9/96 (bug fix) Tcl_UpdateLinkedVar generated an error if the variable +being updated was read-only. (JO) + +8/14/96 (bug fix) The macintosh now supports synchronous socket +connections. Other minor bugs were also fixed. (RJ) + +8/15/96 (configuration improvement) Changed the file patchlevel.h +to be tclPatch.h. This avoids conflict with the Tk file and is now +in 8.3 format on the Windows platform. (RJ) + +8/20/96 (bug fix) Fixed core dump in interp alias command for interpreters +created with Tcl_CreateInterp (as opposed to with Tcl_CreateSlave). (JL) + +8/20/96 (bug fix) No longer masking ECONNRESET on Windows sockets so +that the higher level of the IO mechanism sees the error instead of +entering an infinite loop. (JL) + +8/20/96 (bug fix) Destroying the last interpreter no longer closes the +standard channels. (JL) + +8/20/96 (bug fix) Closing one of the stdin, stdout or stderr channels and +then opening a new channel now correctly assigns the new channel as the +standard channel that was closed. (JL) + +8/20/96 (bug fix) Added code to unix/tclUnixChan.c for using ioctl with +FIONBIO instead of fcntl with O_NONBLOCK, for those versions of Unix where +either O_NONBLOCK is not supported or implemented incorrectly. (JL) + +8/21/96 (bug fix) Fixed "file extension" so it correctly returns the +extension on files like "foo..c" as "..c" instead of ".c". (SS) + +8/22/96 (bug fix) If environ[] contains static strings, Tcl would core +dump in TclSetupEnv because it was trying to write NULLs into the actual +data in environ[]. Now we instead copy as appropriate. (JL) + +8/22/96 (added impl) Added missing implementation of Tcl_MakeTcpClientChannel +for Windows platform. Code contributed by Mark Diekhans. (JL) + +8/22/96 (new feature) Added a new memory allocator for the Macintosh +version of Tcl. It's quite a bit faster than MetroWerk's version. (RJ) + +8/26/96 (documentation update) Removed old change bars (for all changes +in Tcl 7.5 and earlier releases) from manual entries. (JO) + +8/27/96 (enhancement) The exec and open commands behave better and work in +more situations under Windows NT and Windows 95. Documentation describes +what is still lacking. (CS) + +8/27/96 (enhancement) The Windows makefiles will now compile even if the +compiler is not in the path and/or the compiler's environment variables +have not been set up. (CS) + +8/27/96 (configuration improvement) The Windows resource files are +automatically updated when the version/patch level changes. The header file +now has a comment that reminds the user which other files must be manually +updated when the version/patch level changes. (CS) + +8/28/96 (new feature) Added file manipulation features (copy, rename, delete, +mkdir) that are supported on all platforms. They are implemented as +subcommands to the "file" command. See the documentation for the "file" +command for more information. (JH) + +----------------- Released 7.6b1, 8/30/96 ----------------------- + +9/3/96 (bug fix) Simplified code so that standard channels are created +lazily, they are added to an interpreter lazily, and they are never added +to a safe interpreter. (JL) + +9/3/96 (bug fix) Closing a channel after closing a standard channel, e.g. +stdout, would cause the implicit recreation of that standard channel. (JL) + +9/3/96 (new feature) Now calling Tcl_RegisterChannel with a NULL +interpreter increments the refcount so that code outside any interpreter +can use channels that are also registered in interpreters, without worrying +that the channel may turn into a dangling pointer at any time. Calling +Tcl_UnregisterChannel with a NULL interpreter only decrements the recount +so that code outside any interpreter can safely declare it is no longer +interested in a channel. (JL) + +9/4/96 (new features) Two changes to dynamic loading: + - If the file name is empty in the "load" command and there is no + statically loaded version of the package, a dynamically loaded + version will be used if there is one. + - Tcl_StaticPackage ignores redundant calls for the same package. (JO) + +9/6/96 (bug fix) Platform specific procedures for manipulating files are +no longer macros and have been prefixed with "Tclp", such as TclpRenameFile. +Unix file code now handles symbolic links and other special files correctly. +The semantics of file copy and file rename has been changed so that if +a target directory exists, the source files will NOT be merged with the +existing files. (JH) + +9/6/96 (bug fix) If standard channel is NULL, because Tcl cannot connect +to the standard channel, do not increment the refcount. The channel can +be NULL if there is for example no standard input. (JL) + +9/6/96 (portability improvement) Changed parsing of backslash sequences +like \n to translate directly to absolute values like 0xa instead of +letting the compiler do the translation. This guarantees that the +translation is done the same everywhere. (JO) + +9/9/96 (bug fix) If channel is opened and not associated with any +interpreter, but Tcl decides to use it as one of the standard channels, it +became impossible to close the channel with Tcl_Close -- instead you had +to call Tcl_UnregisterChannel. Fixed now so that it's safe to call +Tcl_Close even when Tcl is using the channel as one of the standard ones. (JL) + +9/11/96 (feature change) The Tcl library is now placed in the Tcl +shared libraries resource. You no longer need to place the Tcl files +in your applications explicitly. (RJ) + +9/11/96 (feature change) Extensions no longer automatically have the +resource fork of the extension opened for it. Instead you need to +use the tclMacLibrary.c file in your extension. (RJ) +*** POTENTIAL INCOMPATIBILITY *** + +9/12/96 (bug fix) The extension loading mechanism on the Macintosh now +looks at the 'cfrg' resource to determine where to load the code +fragment from. This means FAT fragments should now work. (RJ) + +9/18/96 (enhancement) The exec and open commands behave better and work in +more situations under Windows 3.X. Documentation describes what is still +lacking. (CS) + +9/19/96 (bug fix) Fixed a panic which would occur if you delete a +non-existent alias before any aliases are created. Now instead correctly +returns an error that the alias is not found. (JL) + +9/19/96 (bug fix) Slave interpreters could rename aliases and they would +not get deleted when the alias was being redefined. This led to dangling +pointers etc. (JL) + +9/19/96 (bug fix) Fixed a panic where a hash table entry was being deleted +twice during alias management operations. (JL) + +9/19/96 (bug fix) Fixed bug in event loop that could cause the input focus +in Tk to get confused during menu traversal, among other problems. The +problem was related to handling of the "marker" when its event was +deleted. (JO) + +9/26/96 (bug fix) Windows was losing EOF on a socket if the FD_CLOSE event +happened to precede any left over FD_READ events. Now correctly remembers +seeing FD_CLOSE, so that trailing FD_READ events are not discarded if they +do not contain any data. This allows Tcl to correctly get a zero read and +notice EOF. (JL) + +9/26/96 (bug fix) Was not resetting READABLE state properly on sockets +under Windows if the driver discarded an FD_READ event because no data was +present. Now correctly resets the state. (JL) + +9/30/96 (bug fix) Made EOF sticky on Windows sockets, so that fileevent +readable will fire repeatedly until the socket is closed. Previously the +fileevent fired only once. This could lead to never-closed connections if +the Tcl script in the fileevent wasn't closing the socket immediately. (JL) + +10/2/96 (new feature) Improved the package loader: + - Added new variable tcl_pkgPath, which holds the default + directories under which packages are normally installed (each + package goes in a separate subdirectory of a directory in + $tcl_pkgPath). These directories are included in auto_path by + default. + - Changed the package auto-loader to look for pkgIndex.tcl files + not only in the auto_path directories but also in their immediate + children. This should make it easier to install and uninstall + packages (don't have to change auto_path or merge pkgIndex.tcl + files). (JO) + +10/3/96 (bug fix) Changed tclsh to look for tclshrc.tcl instead of +tclsh.rc on startup under Windows. This is more consistent with wish and +uses the right extension. (SS) +*** POTENTIAL INCOMPATIBILITY *** + +10/8/96 (bug fix) Convertclock does not parse 24-hour times of the +form "hhmm" correctly when hour = 00. In the parse code, hour must be +>= 100 for minutes to be non-zero. Thanks to Lint LaCour for this +bug fix. (RJ) + +10/11/96 (bug fix) Under Windows, the pid command returned the process +handle instead of the process id. (SS) + +----------------- Released 7.6, 10/16/96 ----------------------- + +10/29/96 (bug fix) Under Windows, sockets would consume 100% CPU time after +the first accept(), due to a typo. (JL) + +10/29/96 (bug fix) Incorrect refcount management caused standard channels +not to get deleted at process exit or DLL unload time, causing a memory +leak of upwards of 20K each time. (JL) + +11/7/96 (bug fix) Auto-exec didn't work on file names that contained +spaces. (JO) + +11/8/96 (bug fix) Fixed core dump that would occur if more than one call +to Tcl_DeleteChannelHandler was made to delete a given channel handler. (JL) + +11/8/96 (bug fix) Fixed test for return value in Tcl_Seek and Tcl_SeekCmd +to only treat -1 as error, instead of all negative numbers. (JL) + +11/12/96 (bug fix) Do not blocking waiting for processes at the end of a +pipe during exit cleanup. (JL) + +11/12/96 (bug fix) If we are in exit cleanup, do not close the system level +file descriptors 0, 1 and 2. Previously they were being closed which is +incorrect, in the embedded case. This led to weird behavior for programs +that want to interpose on I/O through the standard file descriptors (e.g. +Netscape Navigator). (JL) + +11/15/96 (bug fix) Fixed core dump on Windows sockets due to dependency on +deletion order at exit. Now all socket functions check to see if sockets +are (still) initialized, before calling through function pointers. Before, +they would call and might end up calling unloaded object code. (JL) + +11/15/96 (bug fix) Fixed core dump in Windows socket initialization routine +if sockets were not installed on the system. Before, it was not properly +checking the result of attempting to load the socket DLL, so it would call +through uninitialized function pointers. (JL) + +11/15/96 (bug fix) Fixed memory leak in Windows sockets which left socket +DLL handle open and could hold the socket DLL in memory uneccessarily, +until a reboot. (JL) + +12/4/96 (bug fix) Fixed bug in Macintosh socket code that could result +in lost data if a client was closed too soon after sending data. (RJ) + +12/17/96 (bug fix) Fixed deadlock bug in Windows sockets due to losing an +event. This was happening because of an interaction between buffering and +nonblocking mode on sockets. Now switched to sockets being blocking by +default, so we are also no longer emulating blocking through a private +event loop. (JL) + +1/21/97 (performance bug fix) Client TCP connections were slow to create +because getservbyname was always called on the port. Now this is only +done if Tcl_GetInt fails. (BW) + +1/21/97 (configuration fix) Made it possible to override TCL_PACKAGE_PATH +during make. Previously it was only set during autoconf process. + +1/29/97 (bug fix) Fixed some problems with the clock command that +impacted how dates were scaned after the year 2000. (RJ) + +----------------- Released 7.6p2, 1/31/97 ----------------------- + +2/5/97 (bug fix) Fixed a bug where in CR-LF translation mode, \r bytes +in the input stream were not being handled correctly. (JL) + +2/24/97 (bug fix) Fix bug with exec under Win32s not being able to create +stderr file which caused all execs to fail. Fixed temp file leak under +Win32s. Fixed optional parameter bug with SearchPath that only happened +under Win32s 1.25. (CCS) + +---------------------------------------------------------- +Changes for Tcl 7.6 go above this line. +Changes for Tcl 7.7 go below this line. +---------------------------------------------------------- + +5/8/96 (new feature) Added Tcl_Ungets C API for putting a sequence of bytes +into a channel's input buffer. This can be used for "push" model channels +where the input is obtained via callbacks instead of by request of the +generic IO code. No Tcl procedure yet. (JL) + +11/15/96 (new feature) Implemented hidden commands. New C APIs: + Tcl_HideCommand -- hides an existing exposed command. + Tcl_ExposeCommand -- exposes an existing hidden command. +New tcl APIs: + interp invokehidden -- invokes a hidden command in a slave. + interp hide -- hides an existing exposed command. + interp expose -- exposes an existing hidden command. + interp hidden -- returns a list of hidden commands. +The implementation of Safe Tcl now uses the new hidden commands facility +to implement the safe base, instead of deleting the commands from a safe +interpreter. (JL) + +11/15/96 (new feature) Implemented the safe base, a mechanism for +installing and requesting security policies, purely in Tcl code. Overloads +the package command to also allow an interpreter to "require" a policy. The +following new library commands are provided: + tcl_safeCreateInterp -- creates a slave an initializes the + policy mechanism. + tcl_safeInitInterp -- initializes an existing slave with the + policy mechanism. + tcl_safeDeleteInterp -- deletes a slave and deinitializes the + policy mechanism. + tcl_safeAutoPath -- manages per slave path for package + finding and auto-loading. + tcl_safePolicyPath -- manages global search path for finding + security policies. +Added a new file to the library, safeinit.tcl, to hold implementation. (JL) + +12/6/96 (new feature) Implemented Tcl_Finalize, an API that should be +called by a process when it is done using Tcl. This API runs all the exit +handlers to allow them to clean up resources etc. (JL) + +12/17/96 (new feature) Add an http Tcl script package to the Tcl library. +This package implements the client side of HTTP/1.0; the GET, HEAD, +and POST requests. (BW) + +1/21/97 (new feature) Added a "marktrusted" subcommand to the "interp" and +to the interpreter object command. It removes the "safe" mark on an +interpreter and disables hard-wired checks for safety in the C sources. (JL) + +1/21/97 (removed feature) Removed "vwait" from set of commands available in +a safe interpreter. (JL) + +2/11/97 (new feature, bug fix) http package. Added -accept to http_config +so you can set the Accept header. Added -handler option to http_get so +you can supply your own data handler. Also fixed POST operation to +set the correct MIME type on the request. (BW) + +---------------------------------------------------------- +Changes for Tcl 7.7 go above this line. +Changes for Tcl 8.0 go below this line. +---------------------------------------------------------- + +9/17/96 (bug fix) Using "upvar" it was possible to turn an array element +into an array itself. Changed to disallow this; it was quirky and didn't +really work correctly anyway. (JO) + +10/21/96 (new feature) The core of the Tcl interpreter has been replaced +with an on-the-fly compiler that translates Tcl scripts to bytecoded +instructions; a new interpreter then executes the bytecodes. The compiler +introduces only a few minor changes at the level of Tcl scripts. The biggest +changes are to expressions and lists. + - A second level of substitutions is no longer done for expressions. + This substantially improves their execution time. This means that + the expression "$x*4" produces a different result than in the past + if x is "$y+2". Fortunately, not much code depends on the old + two-level semantics. Some expressions that do, such as + "expr [join $list +]" can be recoded to work in Tcl8.0 by adding + an eval: e.g., "eval expr [join $list +]". + - Lists are now completely parsed on the first list operation to + create a faster internal representation. In the past, if you had a + misformed list but the erroneous part was after the point you + inserted or extracted an element, then you never saw an error. + In Tcl8.0 an error will be reported. This should only effect + incorrect programs that took advantage of behavior of the old + implementation that was not documented in the man pages. +Other changes to Tcl scripts are discussed in the web page at +http://www.sunlabs.com/research/tcl/compiler.html. (BL) +*** POTENTIAL INCOMPATIBILITY *** + +10/21/96 (new feature) In earlier versions of Tcl, strings were used as a +universal representation; in Tcl 8.0 strings are replaced with Tcl_Obj +structures ("objects") that can hold both a string value and an internal +form such as a binary integer or compiled bytecodes. The new objects make it +possible to store information in efficient internal forms and avoid the +constant translations to and from strings that occurred with the old +interpreter. There are new many new C APIs for managing objects. Some of the +new library procedures for objects (such as Tcl_EvalObj) resemble existing +string-based procedures (such as Tcl_Eval) but take advantage of the +internal form stored in Tcl objects for greater speed. Other new procedures +manage objects and allow extension writers to define new kinds of objects. +See the manual entries doc/*Obj*.3 (BL) + +10/24/96 (bug fix) Fixed memory leak on exit caused by some IO related +data structures not being deallocated on exit because their refcount was +artificially boosted. (JL) + +10/24/96 (bug fix) Fixed core dump in Tcl_Close if called with NULL +Tcl_Channel. (JL) + +11/19/96 (new feature) Added library procedures for finding word +breaks in strings in a platform specific manner. See the library.n +manual entry for more information. (SS) + +11/22/96 (feature improvements) Added support for different levels of +tracing during bytecode compilation and execution. This should help in +tracking down suspected problems with the compiler or with converting +existing code to use Tcl8.0. Two global Tcl variables, traceCompile +and traceExec, can be set to generate tracing information in stdout: + - traceCompile: 0 no tracing (default) + 1 trace compilations of top level commands and procs + 2 trace and display instructions for all compilations + - traceExec: 0 no tracing + 1 trace only calls to Tcl procs + 2 trace invocations of all commands including procs + 3 detailed trace showing the result of each instruction +traceExec >= 2 provides a one line summary of each called command and +its arguments. Commands that have been "compiled away" such as set are +not shown. (BL) + +11/30/96 (bug fix) The command "info nameofexecutable" could sometimes +return the name of a directory. (JO) + +11/30/96 (feature improvements) Changed the code in library/init.tcl +that reads in pkgIndex.tcl so that (a) it reads the files from child +directories before those in the parent, so that the parent gets +precedence, and (b) it doesn't quit if there is an error in a +pkgIndex.tcl file; instead, it prints an error message on standard +error and continues. (JO) + +10/5/96 (feature improvements) Partial implementation of binary string +support: the ability for Tcl string values to contain embedded null bytes. +Changed the Tcl object-based APIs to take a byte pointer and length pair +instead of a null-terminated C string. Modified several object type managers +to support binary strings but not, for example, the list type manager. +Existing string-based C APIs are unchanged and will truncate binary +strings. Compiled scripts containing nulls are also truncated. (BL) + +12/12/96 (feature change) Removed the commands "cp", "mkdir", "mv", +"rm", and "rmdir" from the Macintosh version of Tcl. They were never +officially supported and their functionality is now available via +the file command. (RJ) + +----------------- Released 8.0a1, 12/20/96 ----------------------- + +1/7/97 (bug fix) Under Windows, "file stat c:" was returning error instead +of stat for current dir on c: drive. + +1/10/97 (new feature) Added Tcl_GetIndexFromObj procedure for quick +lookups of keyword arguments. (JO) + +1/12/97 (new feature) Serial IO channel drivers for Windows and Unix, +available by using Tcl open command to open pseudo-files like "com1:" or +"/dev/ttya". New option to Tcl fconfigure command for serial files: +"-mode baud,parity,data,stop" to specify baud rate, parity, data bits, and +stop bits. Serial IO is not yet available on Mac. + +1/16/97 (feature change) Restored the Tcl7.x "two level substitution +semantics" for expressions. Expressions not enclosed in braces are +implemented, in general, by calling the expr command procedure +(Tcl_ExprObjCmd) at runtime after the Tcl interpreter has already done a +first round of substitutions. This is slow (about Tcl7.x speed) because new +code for the expression is generally compiled each time. However, if the +expression has only variable substitutions (and not command substitutions), +"optimistic" fast code is generated inline. This inline code will fail if a +second round of substitutions is needed (i.e., if the value of a substituted +variable itself requires more substitutions). The optimistic code will +catch the error and back off to call the slower but guaranteed correct +expr command procedure. (BL) + +1/16/97 (feature improvements) Added Tcl_ExprLongObj and Tcl_ExprDoubleObj +to round out expression-related procedures. (BL) + +1/16/97 (feature change) Under Windows, at startup the environment variables +"path", "comspec", and "windir" in any capitalization are converted +automatically to upper case. The PATH variable could be spelled as path, +Path, PaTh, etc. and it makes programming rather annoying. All other +environment variables are left alone. (CS) + +1/20/97 (new features) Rewrote the "lsort" command: + - The new version is based on reentrant merge sort code provided + by Richard Hipp, so it eliminates the reentrancy and stability + problems with the old qsort-based implementation. + - The new version supports a -dictionary option for sorting, and + it also supports a -index option for sorting lists using one + element for comparison. + - The new version is an object command, so it works well with the + Tcl compiler, especially in conjunction with the new -index + option. When the -index option is used, this version of lsort + is more than 100 times faster than the Tcl 7.6 lsort, which had + to use the -command option to get the same effect. (JO) + +1/20/97 (feature improvements) Added the improved debugging support for Tcl +objects prototyped by Karl Lehenbauer <karl@hammer1.ops.NeoSoft.com>. +If TCL_MEM_DEBUG is defined, the object creation calls use Tcl_DbCkalloc +directly in order to record the caller's source file name and line +number. (BL) + +1/21/97 (removed feature) Desupported the tcl_precision variable: if +set, it is ignored. Tcl now uses the full 17 digits of precision when +converting real numbers to strings (with the new object system real +numbers are rarely converted to strings so there is no efficiency +disadvantage to printing all 17 digits; the new scheme improves +accuracy and simplifies several APIs). (JO) +*** POTENTIAL INCOMPATIBILITY *** + +1/21/97 (feature change) Removed the "interp" argument for the +procedures Tcl_GetStringFromObj, Tcl_StringObjAppend, and +Tcl_StringObjAppendObj. Also removed the "interp" argument for +the updateStringProc procedure in Tcl_ObjType structures. With +the tcl_precision changes above, these are no longer needed. (JO) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0a1, but not with Tcl 7.6 *** + +1/22/97 (bug fix) Fixed http.tcl so that http_reset does not result in +an extra call to the command callback. In addition, if the transaction +gets a premature eof, the state(status) is "eof", not "ok". (BW) + +----------------- Released 8.0a2, 1/24/97 ----------------------- + +1/29/97 (feature change) Changed how two digit years are parsed in the +clock command. The old interface just added 1900 which will seem +broken by the year 2000. The new scheme follows the POSIX standard +and treats dates 70-99 as 1970-1999 and dates 00-38 as 2000-2038. All +other two digit dates are undefined. (RJ) +*** POTENTIAL INCOMPATIBILITY *** + +2/4/97 (bug fix) Fixed bug in clock code that dealt with relative +dates. Using the relative month code you could get an invalid date +because it jumped into a non-existant day. (For example, Jan 31 +to Feb 31.) The code now will return the last valid day of the +month in these situations. Thanks to Hume Smith for sending in +this bug fix. (RJ) + +2/10/97 (feature change) Eliminated Tcl_StringObjAppend and +Tcl_StringObjAppendObj procedures, replaced them with Tcl_AppendToObj +and Tcl_AppendStringsToObj procedures. Added new procedure +Tcl_SetObjLength. (JO) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0a2, but not with Tcl 7.6 *** + +2/10/97 (new feature) Added Tcl_WrongNumArgs procedure for generating +error messages about incorrect number of arguments. (JO) + +2/11/97 (new feature, bug fix) http package. Added -accept to http_config +so you can set the Accept header. Added -handler option to http_get so +you can supply your own data handler. Also fixed POST operation to +set the correct MIME type on the request. (BW) + +2/22/97 (bug fix) Fixed bug that caused $tcl_platform(osVersion) to be +computed incorrectly under AIX. (JO) + +2/25/97 (new feature, feature change) Added support for both int and long +integer objects. Added Tcl_NewLongObj/Tcl_GetLongFromObj/Tcl_SetLongFromObj +procedures and renamed the Tcl_Obj internalRep intValue member to +longValue. Tcl_GetIntFromObj now checks for integer values too large to +represent as non-long integers. Changed Tcl_GetAllObjTypes to +Tcl_AppendAllObjTypes. (BL) + +3/5/97 (new feature) Added new Tcl_SetListObj procedure to round out +collection of procedures that set the type and value of existing Tcl +objects. (BL) + +3/6/97 (new feature) Added -global flag for interp invokehidden. (JL) + +3/6/97 (new feature, feature change) Added isNativeObjectProc field to the +Tcl_CmdInfo structure to indicate (when 1) if the command has an +object-based command procedure. Removed the nameLength arg from +Tcl_CreateObjCommand since command names can't contain null characters. (BL) + +3/6/97 (bug fix) Fixed bug in "unknown" procedure that caused auto- +loading to fail on commands whose names begin with digits. (JO) + +3/7/97 (bug fix) Auto-loading now works in Safe Base. Safe interpreters +only accept the Version 2 and onwards tclIndex files. (JL) + +3/13/97 (bug fix) Fixed core dump due to interaction between aliases and +hidden commands. Bug found by Lindsay Marshall. (JL) + +3/14/97 (bug fix) Fixed mac bugs relating to time. The -gmt option +now adjusts the time in the correct direction. (Thanks to Ed Hume for +reporting a fix to this problem.) Also fixed file "mtime" etc. to +return times from GMT rather than local time zone. (RJ) + +3/18/97 (feature change) Declaration of objv in Tcl_ObjCmdProc function +changed from "Tcl_Obj *objv[]" to "Tcl_Obj *CONST objv[]". All Tcl object +commands changed to use new declaration of objv. Naive translation of +string-based command procs to object-based command procs could very easily +have yielded code where the contents of the objv array were changed. This +is not a problem with string-based command procs, but doing something as +simple as objv[2] = objv[3] would corrupt the runtime stack and cause Tcl to +crash. Introduced CONST in declaration of objv so that attempted assignment +of new pointer values to elements of the objv array will be caught by the +compiler. (CCS) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0a2 *** + +3/19/97 (bug fix) Fixed panic due to object sharing. The root cause was +that old code was using Tcl_ResetResult instead of Tcl_ResetObjResult. (JL) + +3/20/97 (new feature) Added a new subcommand for the file +command. file attributes filename can give a list of platform-specific +options (such as file/creator type on the Mac, permissions on Unix) or +set the values of them. Added a new subcommand for the file +command. file nativename name gives back the platform-specific form +for the file. This is useful when the filename is needed to pass to +the OS, such as exec under Windows 95 or AppleScript on the Mac. For +more info, see file.n. (SRP) + +3/24/97 (removed feature) Removed the tcl_safePolicyPath procedure. Now +the policy path is computed from the auto_path by appending the directory +'policies' to each element. Also fixed several bugs in automatic tracking +of auto_path by computed policy path. (JL) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0a2 but not with Tcl 7.6 *** + +4/8/97 (new feature) If the variable whose name is passed to lappend doesn't +already exist, and there are no value arguments, lappend now creates the +variable with an empty value instead of returning an error. Change suggested +by Tom Tromey. (BL) + +4/9/97 (feature change) Changed the name of the TCL_PART1_NOT_PARSED flag to +TCL_PARSE_PART1. (BL) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0a2 but not with Tcl 7.6 *** + +4/10/97 (bug fixes) Fixed various compilation-related bugs: + - "UpdateStringOfCmdName should never be invoked" panic. + - Bad code generated for expressions not in {}'s inside catch commands. + - Segmentation fault in some command procedures when two argument + object pointers refer to the same object. + - Second level of substitutions were never done for expressions not + in {}'s that consist of a single variable reference: e.g., + "set x 27; set bool {$x}; if $bool {puts foo}" would fail with error. + - Bad code generated when code storage was grown while compiling some + expressions: ones with compilation errors or consisting of only a + variable reference. + - Bugs involving multiple interpreters: wasn't checking that a + procedure's code was compiled for the same interpreter as the one + executing it, and didn't invalidate code on hidden-exposed command + transitions. + - "Bad stack top" panic when executing scripts that require a huge + amount of stack space. + - Incorrect sharing of code for procedure bodies, and procedure code + deallocated before last execution of the procedure finished. + - Fixed compilation of expression words in quotes. For example, + if "0 < 3" {puts foo}. + - Fixed performance bug in array set command with large assignments. + - Tcl_SetObjLength segmentation fault setting length of empty object. + - If Tcl_SetObjectResult was passed the same object as the interpreter's + result object, it freed the object instead of doing nothing. Bug fix + by Michael J. McLennan. + - Tcl_ListObjAppendList inserted elements from the wrong list. Bug fix + by Michael J. McLennan. + - Segmentation fault if empty variable list was specified in a foreach + command. Bug fix by Jan Nijtmans. + - NULL command name was always passed to Tcl_CreateTrace callback + procedure. + - Wrong string representation generated for the value LONG_MIN. + For example, expr 1<<31 printed incorrectly on a 32 bit machine. + - "set {a($x)} 1" stored value in wrong variable. + - Tcl_GetBooleanFromObj was not checking for garbage after a numeric + value. + - Garbled "bad operand type" error message when evaluating expressions + not surrounded by {}'s. (BL) + +4/16/97 (new feature) The expr command now has the "rand()" and +"srand()" functions for getting random numbers in expr. (RJ) + +4/23/97 (bug fix) Fixed core dump in bgerror when the error handler command +deletes the current interpreter. Found by Juergen Schoenwald. (JL) + +4/23/97 (feature change) The notifier interfaces have been redesigned +to make embedding in applications with external event loops possible. +A number of interfaces in the notifier and the channel drivers have +changed. Refer to the Notifier.3 and CrtChannel.3 manual entries for +more details. (SS) +*** POTENTIAL INCOMPATIBILITY *** + +4/23/97 (removed feature) The Tcl_File interfaces have been removed. +The Tcl_CreateFileHandler/Tcl_DeleteFileHandler interfaces now take +Unix fd's and are only supported on the Unix platform. +Tcl_GetChannelFile has been replaced with Tcl_GetChannelHandle. +Tcl_MakeFileChannel now takes a platform specific file handle. (SS) +*** POTENTIAL INCOMPATIBILITY *** + +4/23/97 (removed feature) The modal timeout interface has been +removed (Tcl_CreateModalTimeout/Tcl_DeleteModalTimeout) (SS) +*** POTENTIAL INCOMPATIBILITY *** + +4/23/97 (feature change) Channel drivers are now required to correctly +implement blocking behavior when they are in blocking mode. (SS) +*** POTENTIAL INCOMPATIBILITY *** + +4/23/97 (new feature) Added the "binary" command for manipulating +binary strings. Also, changed the "puts", "gets", and "read" commands +to preserve embedded nulls. (SS) + +4/23/97 (new feature) Added tcl_platform(byteOrder) element to the +tcl_platform array to identify the native byte order for the current +host. (SS) + +4/23/97 (bug fix) Fixed bug in date parsing around year boundaries. (SS) + +4/24/97 (bug fix) In the process of copying a file owned by another user, +Tcl was changing the owner of the copy back to the owner of the original +file, therefore causing further file operations to fail because the current +user didn't own the copy anymore. The owner of the copy is now left as the +current user. (CCS) + +4/24/97 (feature change) Under Windows, don't automatically uppercase the +environment variable "windir" -- it's supposed to be lower case. (CCS) + +4/29/97 (new feature) Added namespace support based on a namespace +implementation by Michael J. McLennan of Lucent Technologies. A namespace +encapsulates a collection of commands and variables to ensure that they +won't interfere the commands and variables of other namespaces. The global +namespace holds all global variables and commands. Additional namespaces are +created with the new namespace command. The new variable command lets you +create Tcl variables inside a namespace. The names of Tcl variables and +commands may now be qualified by the name of the namespace containing them. +The key namespace-related commands are summarized below: + - namespace ?eval? name arg ?arg...? + Used to define the commands and variables in a namespace. + Optionally creates the namespace. + - namespace export ?-clear? ?pattern pattern...? + Specifies which commands are exported from a namespace. These + are the ones that can be imported into another namespace. + - namespace import ?-force? ?pattern pattern...? + Makes the specified commands accessible in the current namespace. + - namespace current + Returns the name of the current namespace. + - variable name ?value? ?name ?value?...? + Creates one or more namespace variables. (BTL) + +5/1/97 (bug fix) Under Windows, file times were reported in GMT. Should be +reported in local time. (CCS) + +5/2/97 (feature change) Changed the name of the two Tcl variables used for +tracing bytecode compilation and execution to tcl_traceCompile and +tcl_traceExec respectively. These variables are now documented in the +tclvars man page. (BL) + +5/5/97 (new feature) Support "end" as the index for "lsort -index". (BW) + +5/5/97 (bug fixes) Cleaned up the way the http package resets connections (BW) + +5/8/97 (feature change) Newly created Tcl objects now have a reference count +of zero instead of one. This simplifies C code that stores newly created +objects in Tcl variables or in data structures such as list objects. That C +code must increment the new object's reference count since the variable or +data structure will contain a long-term reference to the object. Formerly, +when new objects started out with reference count one, it was necessary to +decrement the new object's reference count after the store to make sure it +was left with the correct value; this is no longer necessary. (BL) + +5/9/97 (new feature) Added the Tcl_GetsObj interface that takes an +object reference instead of a dynamic string (as in Tcl_Gets). (SS) + +5/12/97 (new feature) Added Tcl_CreateAliasObj and Tcl_GetAliasObj C APIs +to allow an alias command to be created with a vector of Tcl_Obj structures +and to get the vector back later. (JL) + +5/12/97 (feature change) Changed Tcl_ExposeCommand and Tcl_HideCommand to +leave an object result instead of a string result. (JL) + +5/14/97 (feature change) Improved the handling of the interpreter result. +This is still either an object or a string, but the two values are now +kept consistent unless some C code has set interp->result directly. See +the SetResult man page for details. Removed the Tcl_ResetObjResult +procedure. (BL) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0a2 *** + +5/16/97 (new feature) Added "fcopy" command to move data between +channels. Refer to the manual page for more information. Removed the +"unsupported0" command since it is obsolete now. (SS) + +5/16/97 (new feature) Added Tcl_GetStringResult procedure to allow programs +to get an interpreter's result as a string. If the result was previously set +to an object, this procedure will convert the object to a string. Use of +Tcl_GetStringResult is intended to replace direct access to interp->result, +which is not safe. (BL) + +5/20/97 (new features) Fixed "fcopy" to return the number of bytes +transferred in the blocking case. Updated the http package to use +fcopy instead of unsupported0. Added -timeout and -handler options to +http_get. http_get is now blocking by default. It is only non-blocking +if you supply a -command argument. (BW) + +5/22/97 (bug fix) Fixed several bugs in the "lsort" command having to do +with the -dictionary option and the presence of numbers embedded in the +strings. (JO) + +----------------- Released 8.0b1, 5/27/97 ----------------------- + +6/2/97 (bug fix) Fixed bug in startup code that caused a problem in +finding the library files when they are installed in a directory +containing a space in the name. (SS) + +6/2/97 (bug fix) Fixed bug in Unix notifier where the select mask was +not being cleared under some circumstances. (SS) + +6/4/97 (bug fix) Fixed bug that prevented creation of Tk widgets in +namespaces. Tcl_CreateObjCommand and Tcl_CreateCommand now always create +commands in the global namespace unless the command names are qualified. Tcl +procedures continue to be created in the current namespace by default. (BL) + +6/6/97 (new features) Added new namespace API procedures +Tcl_AppendExportList and Tcl_Export to allow C code to get and set a +namespace's export list. (BL) + +6/11/97 (new feature) Added Tcl_ConcatObj. This object-based routine +parallels the string-based routine Tcl_Concat. (SRP) + +6/11/97 (new feature) Added Tcl_SetObjErrorCode. This object-based +routines parallels the string-based routine Tcl_SetErrorCode. (SRP) + +6/12/97 (bug fix) Fix the "unknown" procedure so that wish under Windows +will exec an external program, instead of always complaining "console1 not +opened for writing". (CCS) + +6/12/97 (bug fix) Fixed core dump experienced by the following simple +script: + interp create x + x alias exec exec + interp delete x +This panic was caused by not installing the new CmdDeleteProc when exec +got redefined by the alias creation step. Reported by Lindsay Marshal (JL) + +6/13/97 (new features) Tcl objects newly created by Tcl_NewObj now have a +string representation that points to a shared heap string of length 1. (They +used to have NULL bytes and typePtr fields. This was treated as a special +case to indicate an empty string, but made type manager implementations +complex and error prone.) The new procedure Tcl_InvalidateStringRep is used +to mark an object's string representation invalid and to free any storage +associated with the old string representation. (BL) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0b1, but not with Tcl7.6 *** + +6/16/97 (bug fix) Tcl_ScanCountedElement could leave braces unmatched +if the string ended with a backslash. (JO) + +6/17/97 (bug fix) Fixed channel event bug where readable events would be +lost during recursive events loops if the input buffers contained +data. (SS) + +6/17/97 (bug fix) Fixed bug in Windows socket code that didn't +reenable read events in the case where an external entity is also +reading from the socket. (SS) + +6/18/97 (bug fix) Changed initial setting of the notifier service mode +to TCL_SERVICE_NONE to avoid unexpected event handling during +initialization. (SS) + +6/19/97 (bug fix/feature change) The command callback to fcopy is now +called in case of errors during the background copy. This adds a second, +optional argument to the callback that is the error string. The callback +in case of errors is required for proper cleanup by the user of fcopy. (BW) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0b1, but not with Tcl 7.6 *** + +6/19/97 (bug fix) Fixed a panic due to the following four line script: + interp create x + x alias foo bar + x eval rename foo blotz + x alias foo {} +The problem was that the interp code was not using the actual current name +of the command to be deleted as a result of un-aliasing foo. (JL) + +6/19/97 (feature change) Pass interp down to the ChannelOption and +driver specific calls so system errors can be differentiated from syntax +ones. Changed Tcl_DriverGetOptionProc type. Affects Tcl_GetChannelOption, +TcpGetOptionProc, TtyGetOptionProc, etc. (DL) +*** POTENTIAL INCOMPATIBILITY *** + +6/19/97 (new feature) Added Tcl_BadChannelOption for use by by driver +specific option procedures (Set and Get) to return a complete and +meaningful error message. (DL) + +6/19/97 (bug fixes) If a system call error occurs while doing an +fconfigure on tcp or tty/com channel: return the appropriate error +message (instead of the syntax error one or none). (Fixed for Unix and +most of the Win and Mac drivers). (DL) + +6/20/97 (feature change) Eval is no longer assumed as the subcommand name +in namespace commands: you must now write "namespace eval nsName {...}". +Abbreviations of namespace subcommand names are now allowed. (BL) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0b1, but not with Tcl7.6 *** + +6/20/97 (feature change) Changed the errorInfo traceback message for +compilation errors from "invoked from within" to "while compiling". (BL) + +6/20/97 (bug fixes) Fixed various compilation-related bugs: + - "UpdateStringOfCmdName should never be called" and + "UpdateStringOfByteCode should never be called" panics. + - Segfault in TclObjInterpProc getting procedure name after evaluation + stack is reallocated (grown). + - Could not use ":" at end of variable and command names. + - Bad code generated for while and for commands with test expressions + enclosed in quotes: e.g., "set i 0; while "$i > 5" {}". + - Command trace procedures would crash if they did a Tcl_EvalObj that + reallocated the evaluation stack. + - Break and continue commands did not reset the interpreter result. + - The Tcl_ExprXXX routines, both string- or object-based, always + modified the interpreter result even if there was no error. + - The argument parsing procedure used by several compile procedures + always treated "]" as end of a command: e.g., "set a ]" would fail. + - Changed errorInfo traceback message for compilation errors from + "invoked from within" to "while compiling". + - Problem initializing Tcl object managers during interpreter creation. + - Added check and error message if formal parameter to a procedure is + an array element. (BL) + +6/23/97 (new feature) Added "registry" package to allow manipulation +of the Windows system registry. See manual entry for details. (SS) + +6/24/97 (feature change) Converted http to a package and added the +http1.0 subdirectory of the Tcl script library. This means you have +to do a "package require http" to use this, as advertised in the man page. (BW) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0b1, but not with Tcl 7.6 *** + +6/24/97 (bug fix) Ensure that Tcl_Set/GetVar C APIs, when called without +TCL_LEAVE_ERR_MSG, don't touch the interp result. (DL) + +6/26/97 (feature change) Changed name of Tcl_ExprStringObj to +Tcl_ExprObj. (BL) +*** POTENTIAL INCOMPATIBILITY with Tcl 8.0b1, but not with Tcl 7.6 *** + +----------------- Released 8.0b2, 6/30/97 ----------------------- |