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changes：源码内容

a package's AppInit procedure called Tcl_StaticPackage to register
static packages. (JO)
8/1/96 (bug fix) Fixed a series of bugs in Windows sockets so that async
writebehind in the presence of read event handlers now works, and so that
async writebehind also works on sockets for which a read event handler was
declared and whose channels were then closed before the async write
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.
Added a new file to the library, safeinit.tcl, to hold implementation. (JL)
On 7/9/97, removed the policy loading mechanism from the Safe Base. Left
only the Safe Base aliases dealing with auto-loading and source. (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.scriptics.com/doc/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 reads or writes 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 -----------------------
7/1/97 (new feature) TCL_BUILD_SHARED flag set in tclConfig.sh
when Tcl has been built with --enable-shared. A new tclLibObjs
make target, echoing the list of the .o's needed to build a tcl
library, is now provided. (DL)
7/1/97 (feature change) compat/getcwd.c removed and changed the
only place where getcwd is used so a new USEGETWD flag selects
the use of the replacement "getwd". Adding this flag is recommended
for SunOS 4 (because getcwd on SunOS 4 uses a pipe to pwd(1)!). (DL)
7/7/97 (feature change) The split command now supports binary data (i.e.,
null characters in strings). (BL)
7/7/97 (bug fix) string first returned the wrong result if the first
argument string was empty. (BL)
7/8/97 (bug fix) Fixed core dump in fcopy that could occur when a command
callback was supplied and an error or eof condition caused no background
activity. A refcount bug triggered a panic in Tcl_ListObjAppendElement. (BW)
7/8/97 (bug fix) Relaxed the pattern matching on http_get so you do not
need a trailing path component. You can now get away with just
http_get www.scriptics.com (BW)
7/9/97 (bug fix) Creating anonymous interpreters no longer smashes existing
commands with names similar to the generated name. Previously creating an
anonymous interpreter could smash an existing command, now it skips until
it finds a command name that isn't being used. (JL)
7/9/97 (feature change) Removed the policy management mechanism from the
Safe Base; left the aliases to source and load modules, and to do a limited
form of the "file" command. See entry of 11/15/96. (JL)
7/9/97 (bug fixes) Fixed various compilation-related bugs:
- Line numbers in errorInfo now are the same as those in Tcl7.6 unless
there are compilation errors. Compilation error messages now include the
entire command in error.
- Trailing ::s after namespace names weren't being ignored.
- Could not refer to an namespace variable with an empty name using a
name of the form "n::". (BL)
7/9/97 (bug fix) Fixed bug in Tcl_Export that prevented you from exporting
from other than the current namespace. (BL)
7/9/97 (bug fix) env.test was removing env var needed for proper finding
of libraries in child process. (DL)
7/10/97 (bug fixes/new feature) Cleanup in Tcl_MakeSafe. Less information
is leaked to safe interps. Error message fixes for interp sub commands.
Likewise changes in safealias.tcl; tcl_safeCreateInterp can now be called
without argument to generate the slave name (like in interp create). (DL)
7/10/97 (bug fixes) Bytecode compiler now generates more detailed
command location information: subcommands as well as commands now have
location information. This means command trace procedures now get the
correct source string for each command in their command parameter. (BL)
7/22/97 (bug fixes) Performance improvement in Safe interpreters
handling. Added new mask value to (tclInt.h) Interp.flags record. (DL)
7/22/97 (bug fix) Fixed panic in 'interp target {} foo'. This bug
was present since Tcl 7.6. (JL)
7/22/97 (bug fix) Fixed bug in compilation of procedures in namespaces: the
procedure's namespace must be used to look up compile procedures, not the
current namespace. (BL)
7/22/97 (bug fix) Use of the -channel option of http_get was not setting
the end of line translations mode on the channel, so copying binary data
with the -channel option was corrupting the result on non-unix platforms. (BW)
7/22/97 (bug fixes) file commands and ~user (seg fault and other
improper returns). (DL)
7/23/97 (feature change) Reenabled "vwait" in Safe Base. (JL)
7/23/97 (bug fixes) Fixed two bugs involving read traces on array variables
in procedures: trace procedures were sometimes not called, and reading
nonexistant array elements didn't create undefined element variables that
could later be defined by trace procedures. (BL)
7/24/97 (bug fix) Windows memory allocation performance was
superlinear in some cases. Made the Mac allocator generic and changed
both the Mac and Windows platforms to use the new allocator instead of
malloc and free. (SS)
7/24/97 - 8/12/97 (bug fixes/change of features) Completely revamped safe
sourcing/loading (see safe.n) to hide pathnames, use virtual
paths tokens instead, improved security in several respects and made it
more tunable. Multi level interp loading can work too now. Package auto
loading now works in safe interps as long as the package directory is in
the auto_path (no deep crawling allowed in safe interps). (DL)
*** POTENTIAL INCOMPATIBILITY with previous alpha and beta releases ***
7/24/97 (bug fixes) Made Tcl_SetVar* and Tcl_NewString* treat a NULL value
as an empty string. (This fixes hairy crash case where you would crash
because load command for other interps assumed presence of
errorInfo...). (DL)
7/28/97 (bug fix) Fixed pkg_mkIndex to understand namespaces. It will
use the export list of a namespace and create auto_index entries for
all export commands. Those names are in their fully qualified form in the
auto_index. Therefore, I tweaked unknown to try both $cmd and ::$cmd.
Also fixed pkg_mkIndex so you can have "package require" commands inside
your packages. These commands are ignored, which is mostly ok except
when you must load another package before loading yours because of
linking dependencies. (BW)
7/28/97 (bug fix) A variable created by the variable command now persists
until the namespace is destroyed or the variable is unset. This is true even
if the variable has not been initialized; these variables used to be
destroyed if an error occurred when accessing them. In addition, the "info
vars" command lists uninitialized namespace variables, while the "info
exists" command returns 0 for them. (BL)
7/29/97 (feature change) Changed the http package to use the ::http
namespace. http_get renamed to http::geturl, http_config renamed to
http::config, http_formatQuery renamed to http::formatQuery.
It now provides the 2.0 version of the package.
The 1.0 version is still available with the old names.
*** POTENTIAL INCOMPATIBILITY with Tcl 8.0b2 but not with Tcl 7.6 ***
7/29/97 (bug fix, new feature) Tcl_Main now uses Tcl objects internally to
preserve NULLs in commands and command output. Added new API procedure
Tcl_RecordAndEvalObj that resembles Tcl_RecordAndEval but takes an object
containing a command. (BL)
7/30/97 (bug fix) Tcl freed strings in the environ array even if it
did not allocate them. (SS)
7/30/97 (bug fix) If a procedure is renamed into a different namespace, it
now executes in the context of that namespace. (BL)
7/30/97 (bug fix) Prevent renaming of commands into and from namespaces as
part of hiding them. (JL)
7/31/97 (feature change) Moved the history command from C to tcl.
This uses the ::history namespace. The "words" and "substitute" options
are no longer supported. In addition, the "keep" option without a value
returns the current keep limit. There is a new "clear" option.
The unknown command now supports !! again. (BW)
*** POTENTIAL INCOMPATIBILTY ***
7/30/97 (bug fix) Made sure that a slave can not fool the master into
hiding the wrong command. Made sure we don't crash in hiding + namespaces
issues. (DL)
8/4/97 (bug fix) Concat, eval, uplevel, and similar commands were
incorrectly trimming trailing space characters from their arguments
even when the space characters were preceded by a backslash. (JO)
8/4/97 (bug fix) Removed the hard link between bgerror and tkerror.
Only bgerror is supported in tcl core. Tk will still look for a
tkerror but using regular tcl code for that feature. (DL)
*** POTENTIAL INCOMPATIBILTY with code relying on the hard link ***
8/6/97 (bug fix) Reduced size required for compiled bytecodes by using a
more compact encoding for the command pc-to-source map. (BL)
8/6/97 (new feature) Added support for additional compilation and execution
statistics when Tcl is compiled with the TCL_COMPILE_STATS flag. (BL)
8/7/97 (bug fix) Expressions not in {}s that have a comparison operator as
the topmost operator must be compiled out-of-line (call the expr cmd at
runtime) to properly support expr's two-level substitution semantics. An
example is "set a 2; set b {$a}; puts [expr $b == 2]". (BL)
8/11/97 (bug fix) The catch command would sometimes crash if a variable name
was given and the bytecode evaluation stack was grown when executing the
argument script. (BL)
8/12/97 (feature change) Reinstated the variable tcl_precision to control
the number of digits used when floating-point values are converted to
strings, with default of 12 digits. However, had to make tcl_precision
shared among all interpreters (except that safe interpreters can't
modify it). This makes the Tcl 8.0 behavior almost identical to 7.6
except that the default precision is 12 instead of 6. (JO)
*** POTENTIAL INCOMPATIBILITY ***
----------------- Released 8.0, 8/18/97 -----------------------
8/19/97 (bug fix) Minimal fix for glob -nocomplain bugs:
"glob -nocomplain unreadableDir/*" was generating an anonymous
error. More in depth fixes will come with 8.1. (DL).
8/20/97 (bug fix) Removed check for FLT_MIN in binary command so
underflow conditions are handled by the compiler automatic
conversions. (SS)
8/20/97 (bug fixes) Fixed several compilation-related bugs:
- Array cmd wasn't detecting arrays that, while compiled, do not yet
exist (e.g., are marked undefined since they haven't been assigned
to yet).
- The GetToken procedure in tclCompExpr.c wasn't recognizing properly
whether an integer token was invalid. For example, "0x$" is not
a valid integer.
- Performance bug in TclExecuteByteCode: the size of its stack frame
was reduced by over 20% by moving errorInfo code elsewhere.
- Uninitialized memory read error in tclCompile.c. (BL)
8/21/97 (bug fix) safe::interpConfigure now behave like Tk widget's
configure : it changes only the options you provide and you can get
the current value of any single option. New ?-nested boolean? and
?-statics boolean? for all safe::interp* commands but we still
accept (upward compatibility) the previously defined non valued
flags ?-noStatics? and ?-nestedLoadOk?. Improved the documentation. (DL).
8/22/97 (bug fix) Updated PrintDbl.3 to reflect the fact that the
tcl_precision variable is still used and that it is now shared by all
interpreters. (BL)
8/25/97 (bug fix) Fixed array access bug in IllegalExprOperandType
procedure in tclExecute.c: it was not properly supporting the || and &&
operators. (BL)
8/27/97 (bug fix) In cases where a channel handler was created with an
empty event mask while data was still buffered in the channel, the
channel code would get stuck spinning on a timer that would starve
idle handlers. This mostly happened in Tk when reading from stdin. (SS)
9/4/97 (bug fix) Slave interps now inherit the maximum recursion limit
of their parent instead of starting back at the default. {nb: this still
does not prevent stack overflow by multi-interps recursion or aliasing} (DL)
9/11/97 (bug fix) An uninitialized variable in Tcl_WaitPid caused
pipes to fail to report eof properly under Windows. (SS)
9/12/97 (bug fix) "exec" was misidentifying some DOS executables as not
executable. (CCS)
9/14/97 (bug fix) Was using the wrong structure in sizeof operation in
tclUnixChan.c. (JL)
9/15/97 (bug fix) Fixed notifier to break out of do-one-event loop if
Tcl_WaitForEvent returns 1, so that callers of Tcl_DoOneEvent will get
a chance to check whether the event just handled is significant. This
affected mainly recursive calls to Tcl_VWaitCmd; these did not get a
chance to notice that the variable they were waiting for has been set
and thus they didn't terminate the vwait. (JL, DL, SS)
9/15/97 (bug fix) Alignment problems in "binary format" would cause a
crash on some platforms when formatting floating point numbers. (SS)
9/15/97 (bug fix) Fixed bug in Macintosh socket code. Now passes all
tests in socket.test that are not platform specific. (Thanks to Mark
Roseman for the pointer on the fix.) (RJ)
9/18/97 (bug fix) Fixed bug -dictionary option of lsort that could
cause the compare function to run off the end of an array if the
number only contained 0's. (Thanks to Greg Couch for the report.) (RJ)
9/18/97 (bug fix) TclFinalizeEnvironment was not cleaning up
properly. (DL, JI)
9/18/97 (bug fix) Fixed long-standing bug where an "array get" command
did not trigger traces on the array or its elements. (BL)
9/18/97 (bug fixes) Fixed compilation-related bugs:
- Fixed errorInfo traceback information for toplevel coomands that
contain nested commands.
- In the expr command, && and || now accept boolean operands as well
as numeric ones. (BL)
9/22/97 (bug fix) Fixed bug that prevented translation modes from being
set independently for input and output on sockets if input was "auto". (JL)
9/24/97 (bug fix) Tcl_EvalFile(3) and thus source(n) now works fine on
files containing NUL chars. (DL)
9/26/97 (bug fix) Fixed use of uninitialized memory in the environ array
that later could cause random core dumps. Applies to all platforms. (JL)
9/26/97 (bug fix) Fixed use of uninitialized memory in socket address data
structure under some circumstances. This could cause random core dumps.
This applies only to Unix. (JL)
9/26/97 (bug fix) Opening files on PC-NFS volumes would cause a hang
until the system timed after the file was closed. (SS)
10/6/97 (bug fix) The join(n) command, though objectified, was loosing
NULs in the joinString and in list elements after the 2nd one.
Now you can "join $list " for instance. (DL)
10/9/97 (bug fix) Under windows, if env(TMP) or env(TEMP) referred to a
non-existent directory, exec would fail when trying to create its temporary
files. (CCS)
10/9/97 (bug fix) Under mac and windows, "info hostname" would crash if
sockets were installed but the hostname could not be determined anyhow.
Tcl_GetHostName() was returning NULL when it should have been returning
an empty string. (CCS)
10/10/97 (bug fix) "file attribute /" returned error on windows. (CCS)
10/10/97 (bug fix) Fixed the auto_load procedure to handle procedures
defined in namespaces better. Also fixed pgk_mkIndex so it sees procedures
defined in nested namespaces. Index entries are still only made for
exported procedures. (BW)
10/13/97 (bug fix) On unix, for files with unknown group or owner
attributes, querying the "file attributes" would return an error rather than
returning the group's or owner's id number, although tha command accepts
numbers when setting the file's group or owner. (CCS)
10/22/97 (bug fix) "fcopy" did not eval the callback script at the
global scope. (SS)
10/22/97 (bug fix) Fixed the signature of the CopyDone callback used in
the http package(s) so they can handle error cases properly. (BW)
10/28/97 (bug fixes) Fixed a problem where lappend would free the Tcl object
in a variable if a Tcl_ObjSetVar2 failed because of an error calling a trace
on the variable. (BL)
10/28/97 (bug fix) Changed binary scan to properly handle sign
extension of integers on 64-bit or larger machines. (SS)
11/3/97 (bug fixes) Fixed several bugs:
- expressions such as "expr ($x)" must be compiled out-of-line
(call the expr command procedure at runtime) to ensure the correct
behavior when "$x" is an expression such as "5+10".
- "array set a {}" now creates a new array var with an empty array
value if the var didn't already exist.
- "lreplace $foo end end" no longer returns an error (just an empty
list) if foo is empty.
- upvar will no longer create a variable in a namespace that refers
to a variable in a procedure.
- deleting a command trace within a command trace callback would
make the code that calls traces to reference freed memory.
- significantly sped up "string first" and "string last" (fix from
darrel@gemstone.com).
- seg fault in Tcl_NewStringObj() when a NULL is passed as the byte
pointer argument and Tcl is compiled with -DTCL_MEM_DEBUG.
- documentation and error msg fixes. (BL)
11/3/97 (bug fix) Fixed a number of I/O bugs related to word sizes on
64-bit machines. (SS)
11/6/97 (bug fix) The exit code of the first process created by Tcl
on Windows was not properly reported due to an initialization
problem. (SS)
----------------- Released 8.0p1, 11/7/97 -----------------------
11/19/97 (bug fix) Fixed bug in linsert where it sometimes accidently
cleared out a shared argument list object. (BL).
11/19/97 (bug fix) Autoloading in namespaces was not working properly.
auto_mkindex is still not really namespace aware but most common
cases should now be handled properly (see init.test). (BW, DL)
11/20/97 (enhancement) Made the changes required by the new Apple
Universal Headers V.3.0, so that Tcl will compile with CW Pro 2.
11/24/97 (bug fix) Fixed tests in clock test suite that needed the
-gmt flag set. Thanks to Jan Nijtmans for reporting the problem. (RJ)
----------------- Released 8.0p2, 11/25/97 -----------------------
12/3/97 (bug fix/optimization) Removed uneeded and potentially dangerous
instances of double evaluations if "if" and "expr" statements from
the library files. It is recommended that unless you need a double
evaluation you always use "expr {...}" instead of "expr ..." and
"if {...} ..." instead of "if ... ...". It will also be faster
thanks to the byte compiler. (DL)
---- Shipped as part of the plugin2.0b5 as 8.0p2Plugin1, Dec 8th 97 ----
12/8/97 (bug fix) Need to protect the newly accepted channel in an
accept callback on a socket, otherwise the callback may close it and
cause an error, which would cause the C code to attempt to close the
now deleted channel. Bumping the refcount assures that the channel sticks
around to be really closed in this case. (JL)
12/8/97 (bug fix) Need to protect the channel in a fileevent so that it
is not deleted before the fileevent handler returns. (CS, JL)
12/18/97 (bug fix) In the opt argument parsing package: if the description
had only flags, the "too many arguments" case was not detected. The default
value was not used for the special "args" ending argument. (DL)
1/15/98 (improvement) Moved common part of initScript in common file.
Moved windows specific initialization to init.tcl so you can initialize
Tcl in windows without having to call Tcl_Init which is now only
searching for init.tcl {back ported from 8.1}. (DL)
---- Shipped as part of the plugin as 8.0p2Plugin2, Jan 15th 98 ----
5/27/98 (bug fix) Windows socket driver did not notice new data arriving
on nonblocking sockets until the event loop was entered. (SS)
5/27/98 (bug fix) Windows socket driver used FIONREAD, which is not
supported correctly by WinSock. (SS)
6/9/98 (bug fix) Generic channel code failed to report readable file
events on buffered data that was left behind by a gets or read that
did not consume all available data. (SS)
6/18/98 (bug fix) Compilation of loop expressions was too aggressive
and incorrectly inlined non-literal expressions. (SS)
6/18/98 (bug fix) "info var" and "info locals" incorrectly reported
the existence of compiler temporary variables. (SS)
6/18/98 (bug fix) Dictionary sorting used signed character
comparisons. (SS)
6/18/98 (bug fix) Compile procs corrupted the exception stack in some
cases. (SS)
6/18/98 (bug fix) Array set had erratic behavior when initializing a
variable from an empty value list. (SS)
6/18/98 (bug fix) The Windows registry package had a bad bounds check
that could lead to a crash. (SS)
6/18/98 (bug fix) The foreach compile proc did not correctly handle
non-local variable references. (SS)
6/25/98 (new features) Added name resolution hooks to support [incr Tcl].
There are new internal Tcl_*Resolver* APIs to add, query and remove the hooks.
With this changes it should be possible to dynamically load [incr Tcl]
as an extension. (MM)
7/1/97 (bug fix) The commands "info args, body, default, procs" did
not correctly handle imported procedures. (RJ)
7/6/98 (improvement) pkg_mkIndex now implements the "package require"
command. This makes it possible to create index files for packages
that require another package and then execute code from that package in
their file. Previously, this would throw an error because the required
package had not been loaded. The -nopkgrequied flag is provided to
revert back to the old functionality. (EMS)
7/6/98 (improvement) back-ported the -direct flag from 8.1 into
pkg_mkIndex. This results in pkgIndex.tcl files that contain direct
source or load commands instead of tclPkgSetup commands. (EMS)
7/6/98 (improvement) made changes to the AuxData items structures to support
storage of compiled scripts on disk. Also some related minor changes in
the compilation and execution engine. (EMS)
6/4/98 (enhancement) Added new internal routines to support inserting
and deleting from the stat, access, and open-file-channel mechanisms.
TclAccessInsertProc, TclStatInsertProc, & TclOpenFileChannelInsertProc
insert pointers to such routines; TclAccessDeleteProc, TclStatDeleteProc,
& TclOpenFileChannelDeleteProc delete pointers to such routines. See
the file generic/tclIOUtils.c for more details. (SKS)
7/1/98 (enhancement) Added a new internal C variable
tclPreInitScript. This is a pointer to a string that may hold an
initialization script; If this pointer is non-NULL it is evaluated in
Tcl_Init() prior to the built-in initialization script defined in the
file generic/tclInitScript.h. (SKS)
7/6/98 (bug fix) Removed dead code in PlatformInitExitHandler so that
the TCL_LIBRARY value can be safely patched in binaries. (BW)
7/24/98 (enhancement) Incorporated a new version of auto_mkindex that
can support the [incr Tcl] class structures. This version will index
all procedures in a source file, not just those where "proc" starts
at the beginning of the line. If you want the old behavior, use the
auto_mkindex_old procedure. (MM)
7/24/98 (feature change) Changed the Windows registry key to be
HKEY_LOCAL_MACHINESoftwareScripticsTcl8.0, and to store the path
in the default value instead of "Root". Also, this key can be
specified at compile time in case Tcl is being used in a different
context where it needs an alternate library path from the standard Tcl
installation. (SS)
7/24/98 (feature change) Changed the search order for init.tcl. The
tcl_library variable can now be set before calling Tcl_Init to avoid
doing any searches. If it isn't set, then Tcl checks
env(TCL_LIBRARY), the static value set at compile time, an install
directory relative to the executable, a source directory relative to
the executable, and a tcl directory relative to the source heirarchy
containing the executable. See the comment at the top of
generic/tclInitScript.h for more details. (SS)
7/27/98 (config change) Changed the use of the DBGX flag in configure.in
and the makefile to be TCL_DBGX. Users of tclConfig.sh may need to pass
this through their configure files with AC_SUBST. (BW)
729/98 (bug fix) Changed [info body] to return a copy of the body of a
compiled procedure instead of the body itself, to avoid invalidation
of the internal rep and loss of the byte-codes. (EMS)
8/5/98 (bug fix) The platform init code could walk off the end of a
buffer when reading the PkgPath registry value on Windows. (SS)
8/5/98 (Windows makefile change) Introduced a set of macros to deal with
exporting symbols when compiling DLLS on Windows. See win/README for
details. (EMS)
8/5/98 (addendum) Added a second Windows registry key under
HKEY_LOCAL_MACHINESoftwareScripticsTcl8.0, named "pkgPath".
This is a multi-string value used to initialize the tcl_pkgPath
variable. This is required if extension DLLs are in architecture specific
subdirectories. (SS)
8/6/98 (new feature) Added tcl_findLibrary to init.tcl for use by
extensions, including Tk. This searches in a canonical way for
an extensions library directory and initialization file. (BW)
8/10/98 (bug fix) Imported commands used to get lost if the target
of the import was redefined. Tcl_CreateCommand and Tcl_CreateObjCommand
were updated to restore import links. (Note that if you rename a command,
the import links move to the new name, and if you delete a command then
the import links get lost. These semantics have not changed.) (MC)
-------- Released 8.0.3 to the Tcl Consortium CD-ROM project, 8/10/98 ------
9/3/98 (bug fix) Tcl_Realloc was failing under Windows because the
GlobalReAlloc API was not correctly re-allocating blocks that were
32k+. The fix was to use newer Win32 APIs (HeapAlloc, HeapFree, and
HeapReAlloc.) (BS)
10/5/98 (bug fix) Fixed bug in pkg_mkIndex that caused some files that do
a "package require" of packages in the Tcl libraries to give a warning like
warning: "xx.tcl" provides more than one package ({xx 2.0} {yy 0.3})
and generate a broken pkgIndex.tcl file. (EMS)
10/5/98 (bug fix) Pkg_mkIndex was not doing a case-insensitive comparison
of extensions to determine whether to load or source a file. Thus, under
Windows, MYDLLNAME.DLL was sourced, and mydllname.dll loaded. (EMS)
10/5/98 (new feature) Created a new Tcl_Obj type, "procbody". This object's
internal representation holds a pointer to a Proc structure. Extended
TclCreateProc to take both strings and "procbody". (EMS)
10/13/98 (bug fix) The "info complete" command can now handle strings
with NULLs embedded. Thanks to colin@field.medicine.adelaide.edu.au
for providing this fix. (RJ)
10/13/98 (bug fix) The "lsort -dictionary" command did not properly
handle some numbers starting with 0. Thanks to Richard Hipp
<drh@acm.org> for submitting the fix to Scriptics. (RJ)
10/13/98 (bug fix) The function Tcl_SetListObj was creating an invalid
Tcl_Obj if the list had zero elements (despite what the comments said
it would do). Thanks to Sebastian Wangnick for reporting the
problem. (RJ)
10/20/98 (new feature) Added tcl_platform(debug) element to the
tcl_platform array on Windows platform. The existence of the debug
element of the tcl_platform array indicates that the particular Tcl
shell has been compiled with debug information. Using
"info exists tcl_platform(debug)" a Tcl script can direct the
interpreter to load debug versions of DLLs with the load
command. (SKS)
10/20/98 (feature change) The Makefile and configure scripts have been
changed for IRIX to build n32 binaries instead of the old 32 abi
format. If you have extensions built with the o32 abi's you will need
to update them to n32 for them to work with Tcl. (RJ)
*** POTENTIAL INCOMPATIBILITY ***
10/23/98 (bug fix) tcl_findLibrary had a stray ] in one of the
pathnames it searched for the initialization script. tclInitScript.h
was incorrectly adding the parent of tcl_library to tcl_pkgPath. This
logic was moved into init.tcl, and the initialization of auto_path was
documented. Thanks to Donald Porter and Tom Silva for related
patches. (BW)
10/29/98 (bug fix) Fixed Tcl_NotifyChannel to use Tcl_Preserve instead
of Tcl_RegisterChannel so that 1) unregistered channels do not get
closed after their first fileevent, and 2) errors that occur during
close in a fileevent script are actually reflected by the close
command. (BW)
10/30/98 (bug fix) Overhaul of pkg_mkIndex to deal with transitive
package requires and packages split among scripts and binary files.
Also fixed ommision of global for errorInfo in tcl_findLibrary. (BW)
11/08/98 (bug fix) Fixed the resource command to always detect
the case where a file is opened a second time with the same
permissions. IM claims that this will always cause the same
FileRef to be returned, but in MacOS 8.1+, this is no longer the case,
so we have to test for this explicitly. (JI)
11/10/98 (feature change) When compiling with Metrowerk's MSL, use the
exit function from MSL rather than ExitToShell. This allows MSL to
clean up its temporary files. Thanks to Vince Darley for this
improvement. (JI)
----------------- Released 8.0.4, 11/19/98 -------------------------
11/20/98 (bug fix) Handle possible NULL return in TclGetStdFiles. (RJ)
11/20/98 (bug fix) The dltests would not build on SGI. They reported
that you could not mix n32 with 032 binaries. The configure script
has been modified to get the EXTRA_CFLAGS from the tcl configure
script. [Bug id: 840] (RJ)
12/3/98 (bug fix) Windows NT creates sockets so they are inheritable
by default. Fixed socket code so it turns off this bit right after
creation so sockets aren't kept open by exec'ed processes. [Bug: 892]
Thanks to Kevin Kenny for this fix. (SS)
1/11/98 (bug fix) On HP, "info sharedlibextension" was returning
empty string on static apps. It now always returns ".sl". (RJ)
1/28/99 (configure change) Now support -pipe option on gcc. (RJ)
2/2/99 (bug fix) Fixed initialization problem on Windows where no
searching for init.tcl would be performed if the registry keys were
missing. (stanton)
2/2/99 (bug fix) Added support for HKEY_PERFORMANCE_DATA and
HKEY_DYN_DATA keys in the "registry" command. (stanton)
2/2/99 (bug fix) ENOTSUP and EOPNOTSUPP clashed on some Linux
variants. (stanton)
2/2/99 (enhancement) The "open" command has been changed to use the
object interfaces. (stanton)
2/2/99 (bug fix) In some cases Tcl would crash due to an overflow of
the exception stack resulting from a missing byte code in some
expressions. (stanton)
2/2/99 (bug fix) Changed configure so Linux and IRIX shared libraries
are linked with the system libraries. (stanton)
2/2/99 (bug fix) Added support for BSDI 4.x (BSD/OS-4*) to the
configure script. (stanton)
2/2/99 (bug fix) Fixed bug where upvar could resurrect a namespace
variable after the namespace had been deleted. (stanton)
2/2/99 (bug fix) In some cases when creating variables, the
interpreter result was being modified even if the TCL_LEAVE_ERR_MSG
flag was set. (stanton)
2/2/99 (bug fix & new feature) Changed the socket drivers to properly
handle failures during an async socket connection. Added a new
fconfigure option "-error" to retrieve the failure message. See the
socket.n manual entry for details. (stanton)
2/2/99 (bug fix) Deleting a renamed interp alias could result in a
panic. (stanton)
2/2/99 (feature change/bug fix) Changed the behavior of "file
extension" so that it splits at the last period. Now the extension of
a file like "foo..o" is ".o" instead of "..o" as in previous versions.
*** POTENTIAL INCOMPATIBILITY ***
----------------- Released 8.0.5, 3/9/99 -------------------------
======== Changes for 8.0 go above this line ========
======== Changes for 8.1 go below this line ========
6/18/97 (new feature) Tcl now supports international character sets:
- All C APIs now accept UTF-8 strings instead of iso8859-1 strings,
wherever you see "char *", unless explicitly noted otherwise.
- All Tcl strings represented in UTF-8, which is a convenient
multi-byte encoding of Unicode. Variable names, procedure names,
and all other values in Tcl may include arbitrary Unicode characters.
For example, the Tcl command "string length" returns how many
Unicode characters are in the argument string.
- For Java compatibility, embedded null bytes in C strings are
represented as xC080 in UTF-8 strings, but the null byte at the end
of a UTF-8 string remains . Thus Tcl strings once again do not
contain null bytes, except for termination bytes.
- For Java compatibility, "uXXXX" is used in Tcl to enter a Unicode
character. "u0000" through "uffff" are acceptable Unicode
characters.
- "xXX" is used to enter a small Unicode character (between 0 and 255)
in Tcl.
- Tcl automatically translates between UTF-8 and the normal encoding for
the platform during interactions with the system.
- The fconfigure command now supports a -encoding option for specifying
the encoding of an open file or socket. Tcl will automatically
translate between the specified encoding and UTF-8 during I/O.
See the directory library/encoding to find out what encodings are
supported (eventually there will be an "encoding" command that
makes this information more accessible).
- There are several new C APIs that support UTF-8 and various encodings.
See Utf.3 for procedures that translate between Unicode and UTF-8
and manipulate UTF-8 strings. See Encoding.3 for procedures that
create new encodings and translate between encodings. See
ToUpper.3 for procedures that perform case conversions on UTF-8
strings.
9/18/97 (enhancement) Literal objects are now shared by the ByteCode
structures created when compiled different scripts. This saves up to 45%
of the total memory needed for all literals. (BL)
9/24/97 (bug fixes) Fixed Tcl_ParseCommand parsing of backslash-newline
sequences at start of command words. Suppressed Tcl_EvalDirect error logging
if non-TCL_OK result wasn't an error. (BL)
10/17/97 (feature enhancement) "~username" now refers to the users' home
directory on Windows (previously always returned failure). (CCS)
10/20/97 (implementation change) The Tcl parser has been completely rewritten
to make it more modular. It can now be used to parse a script without actually
executing it. The APIs for the new parser are not correctly exported, but
they will eventually be exported and augmented with Tcl commands so that
Tcl scripts can parse other Tcl scripts. (JO)
10/21/97 (API change) Added "flags" argument to Tcl_EvalObj, removed
Tcl_GlobalEvalObj procedure. Added new procedures Tcl_Eval2 and
Tcl_EvalObjv. (JO)
*** POTENTIAL INCOMPATIBILITY ***
10/22/97 (API change) Renamed Tcl_ObjSetVar2 and Tcl_ObjGetVar2 to
Tcl_SetObjVar2 and Tcl_GetObjVar2 (for consistency with other C APIs)
and changed the name arguments to be strings instead of objects. (JO)
*** POTENTIAL INCOMPATIBILITY ***
10/27/97 (enhancement) Bytecode compiler rewritten to use the new Tcl
parser. (BL)
11/3/97 (New routines) Added Tcl_AppendObjToObj, which appends the
string rep of one Tcl_Obj to another. Added Tcl_GetIndexFromObjStruct,
which is similar to Tcl_GetIndexFromObj, except that you can give an
offset between strings. This allows Tcl_GetIndexFromObjStruct to be
called with a table of records which have strings in them. (SRP)
12/4/97 (enhancement) New Tcl expression parser added. Added new procedure
Tcl_ParseExpr and new token types TCL_TOKEN_SUB_EXPR and
TCL_TOKEN_OPERATOR. Expression compiler is reimplemented to use this
parser. (BL)
12/9/97 (bug fix) Tcl_EvalObj() increments/decrements the refcount of the
script object to prevent the object from deleting itself while in the
middle of being evaluated. (CCS)
12/9/97 (bug fix) Memory leak in Tcl_GetsObjCmd(). (CCS)
12/11/97 (bug fix) Environment array leaked memory when compiled with
Visual C++. (SS)
12/11/97 (bug fix) File events and non-blocking I/O did not work on
pipes under Windows. Changed to use threads to achieve non-blocking
behavior. (SS)
12/18/97 (bug fixes) Fixed segfault in "namespace import"; importing a
procedure that causes a cycle now returns an error. Modified "info procs",
"info args", "info body", and "info default" to return information about
imported procedures as well as procedures defined in a namespace. (BL)
12/19/97 (enhancement) Added new Tcl_GetString() procedure that can be used
in place of Tcl_GetStringFromObj() if the string representation's length
isn't needed. (BL)
12/18/97 (bug fix) In the opt argument parsing package: if the description
had only flags, the "too many arguments" case was not detected. The default
value was not used for the special "args" ending argument. (DL)
1/7/98 (clean up) Moved everything not absolutly necessary out of init.tcl
procs now in auto.tcl and package.tcl can be autoloaded if needed. (DL)
1/7/98 (enhancement) tcltest made at install time will search for it's
init.tcl where it is, even when using virtual path compilation. (DL)
1/8/98 (os bug workaround) when needed, using a replacement for memcmp so
string compare "char with high bit set" "char w/o high bit set" returns
the expected value on all platforms. (DL)
1/8/98 (unix portability/configure) building from .../unix/targetName/
subdirectories and simply using "../configure" should now work fine. (DL)
1/14/98 (enhancement) Added new regular expression package that
supports AREs, EREs, and BREs. The new package includes new escape
characters, meta-syntax, and character classes inside brackets.
Regexps involving backslashes may behave differently. (MH)
*** POTENTIAL INCOMPATIBILITY ***
1/16/98 (os workaround) Under windows, "file volume" was causing chatter
and/or several seconds of hanging when querying empty floppy drives.
Changed implementation to call an empirically-derived function that doesn't
cause this. (CCS)
1/16/98 (enhancement) Converted regular expressions to a Tcl_Obj type so
their compiled form gets cached automatically. Reduced NSUBEXP from 100
to 20. (BW)
1/16/98 (documentation) Change unclear documentation and comments for
functions like Tcl_TranslateFileName() and Tcl_ExternalToUtfDString(). Now
it explicitly says they take an uninitialized or free DString. A DString
that is "empty" or "not holding anything" could have been interpreted as one
currently with a zero length, but with a large dynamically allocated buffer.
(CCS)
----------------- Released 8.1a1, 1/22/98 -----------------------
1/28/98 (new feature) Added a "-direct" optional flag to pkg_mkIndex
to generate direct loading package indexes (such those you need
if you use namespaces and plan on using namespace import just after
package require). pkg_mkIndex still has limitations regarding
package dependencies but errors are now ignored and with -direct, correct
package indexes can be generated even if there are dependencies as long
as the "package provide" are done early enough in the files. (DL)
1/28/98 (enhancement) Performance tuning of regexp and regsub. (CCS)
1/28/98 (bug fix) regexp and regsub with "-indices" returned the byte-offsets
of the characters in the UTF-8 representation, not the character offsets
themselves. (CCS)
1/28/98 (bug fix) "clock format 0 -format %Z -gmt 1" would return the local
timezone string instead of "GMT" on Solaris and Windows.
1/28/98 (bug fix) Restore tty settings when closing serial device on Unix.
This is good behavior when closing real serial devices, essential when
closing the pseudo-device /dev/tty because the user's terminal settings
would be left useless, in raw mode, when tcl quit. (CCS)
1/28/98 (bug fix) Tcl_OpenCommandChannel() was modifying the contents of the
argv array passed to it, causing problems for any caller that wanted to
continue to use the argv array after calling Tcl_OpenCommandChannel(). (CCS)
2/1/98 (bug fix) More bugs with %Z in format string argument to strftime():
1. Borland always returned empty string.
2. MSVC always returned the timezone string for the current time, not the
timezone string for the specified time.
3. With MSVC, "clock format 0 -format %Z -gmt 1" would return "GMT" the first
time it was called, but would return the current timezone string on all
subsequent calls. (CCS)
2/1/98 (bug fix) "file stat" was broken on Windows.
1. "file stat" of a root directory (local or network) or a relative path that
resolved to a root directory (c:. when in pwd was c:/) was returning error.
2. "file stat" on a regular file (S_IFREG), the st_mode was sign extended to
a negative int if the platform-dependant type "mode_t" was declared as a
short instead of an unsigned short.
3. "file stat" of a network directory, the st_dev was incorrectly reported
as the id of the last accessed local drive rather than the id of the
network drive. (CCS)
2/1/98 (bug fix) "file attributes" of a relative path that resolved to a
root directory was returning error. (CCS)
2/1/98 (bug fix) Change error message when "file attribute" could not
determine the attributes for a file. Previously it would return different
error messages on Unix vs. Windows vs. Mac. (CCS)
2/4/98 (bug fixes) Fixed several instances of bugs where the parser/compiler
would reach outside the range of allocated memory. Improved the array
lookup algorithm in set compilation. (DL)
2/5/98 (change) The TCL_PARSE_PART1 flag for Set/Get(Obj)Var2 C APIs is now
deprecated and ignored. The part1 is always parsed when the part2 argument
is NULL. This is to avoid a pattern of errors for extension writers converting
from string based Tcl_SetVar() to new Tcl_SetObjVar2() and who could easily
forget to provide the flag and thus get code working for normal variables
but not for array elements. The performance hit is minimal. A side effect
of that change is that is is no longer possible to create scalar variables
that can't be accessed by tcl scripts because of their invalid name
(ending with parenthesis). Likewise it is also parsed and checked to
ensure that you don't create array elements of array whose name is a valid
array element because they would not be accessible from scripts anyway.
Note: There is still duplicate array elements parsing code. (DL)
*** POTENTIAL INCOMPATIBILITY ***
2/11/98 (bug fix) Sharing objects between interps, such as by "interp
eval" or "send" could cause a crash later when dereferencing an interp
that had been deleted, given code such as:
set a {set x y}
interp create foo
interp eval foo $a
interp delete foo
unset a
Interp "foo" was gone, but "a" had a internal rep consisting of bytecodes
containing a dangling pointer to "foo". Unsetting "a" would attempt to
return resources back to "foo", causing a crash as random memory was
accessed. The lesson is that that if an object's internal rep depends on
an interp (or any other data structure) it must preserve that data in
some fashion. (CCS)
2/11/98 (enhancement) The "interp" command was returning inconsistent error
messages when the specified slave interp could not be found. (CCS)
2/11/98 (bug fix) Result codes like TCL_BREAK and TCL_CONTINUE were not
propagating through the master/slave interp boundaries, such as "interp
eval" and "interp alias". TCL_OK, TCL_ERROR, and non-standard codes like
teh integer 57 work. There is still a question as to whether TCL_RETURN
can/should propagate. (CCS)
2/11/98 (bug fix) TclCompileScript() was derefering memory 1 byte before
start of the string to compile, looking for ']'. (CCS,DL)
2/11/98 (bug fix) Tcl_Eval2() was derefering memory 1 byte before start
of the string to eval, looking for ']'. (CCS,DL)
2/11/98 (bug fix) Compiling "set a(b" was running off end of string. (CCS,DL)
2/11/98 (bug fix) Windows initialization code was dereferencing
uninitialized memory if TCL_LIBRARY environment didn't exist. (CCS)
2/11/98 (bug fix) Windows "registry" command was dereferencing
uninitialized memory when constructing the $errorCode for a failed
registry call. (CCS)
2/11/98 (enhancement) Eliminate the TCL_USE_TIMEZONE_VAR definition from
configure.in, because it was the same information as the already existing
HAVE_TM_ZONE definition. The lack of HAVE_TM_ZONE is used to work around a
Solaris and Windows bug where "clock format [clock sec] -format %Z -gmt 1"
produces the local timezone string instead of "GMT". (CCS)
2/11/98 (bug fix) Memleaks and dereferencing of uninitialized memory in
regexp if an error occurred while compiling a regular expression. (CCS).
2/18/98 (new feature) Added mutexes and thread local storage in order
to make Tcl thread safe. For testing purposes, there is a testthread
command that creates a new thread and an interpreter inside it. See
thread.test for examples, but this script-level interface is not fixed.
Each thread has its own notifier instance to manage its own events,
and threads can post messages to each other's message queue.
This uses pthreads on UNIX, and native thread support on other platforms.
You enable this by configuring with --enable-threads. Note that at
this time *Tk* is still not thread safe. Special thanks to
Richard Hipp: his earlier implementation inspired this work. (BW, SS, JI)
2/18/98 (hidden feature change) The way the env() array is shared among
interpreters changed. Updates to env used to trigger write traces in
other interpreters. This undocumented feature is no longer implemented.
Instead, variable tracing is used to keep the C-level environ array in sync
with the Tcl-level env array. This required adding TCL_TRACE_ARRAY support
to Tcl_TraceVar2 so that array names works properly. (BW)
*** POTENTIAL INCOMPATIBILITY ***
2/18/98 (enhancement) Conditional compilation for unix systems (e.g.,
IRIX, SCO) that use f_bsize instead of st_blksize to determine disk block
size. (CCS)
2/23/98 (bug fix) Fixed the emulation of polling selects in the threaded
version of the Unix notifier. The bug was showing up on a multiprocessor
as starvation of the notifier thread. (BW)
----------------- Released 8.1a2, Feb 23 1998 -----------------------
9/22/98 (bug fix) Changed the value of TCL_TRACE_ARRAY so it no longer
conflicts with the deprecated TCL_PARSE_PART1 flag. This should
improve portability of C code. (stanton)
10/6/98 (bug fix) The compile procedure for "if" incorrectly attempted
to match against the literal string "if", resulting in a stack
overflow when "::if" was compiled. It also would incorrectly accept
"if" instead of "elsif" in later clauses. (stanton)
10/15/98 (new feature) Added a "totitle" subcommand to the "string"
command to convert strings to capitalize the first character of a string
and lowercase all of the other characters. (stanton)
10/15/98 (bug fix) Changed regexp and string commands to properly
handle case folding according to the Unicode character
tables. (stanton)
10/21/98 (new feature) Added an "encoding" command to facilitate
translations of strings between different character encodings. See
the encoding.n manual entry for more details. (stanton)
11/3/98 (bug fix) The regular expression character classification
syntax now includes Unicode characters in the supported
classes. (stanton)
11/6/98 (bug fix) Variable traces were causing crashes when upvar
variables went out of scope. [Bug: 796] (stanton)
11/9/98 (bug fix) "format" now correctly handles multibyte characters
in %s format strings. (stanton)
11/10/98 (new feature) "regexp" now accepts three new switches
("-line", "-lineanchor", and "-linestop") that control how regular
expressions treat line breaks. See the regexp manual entry for more
details. (stanton)
11/17/98 (bug fix) "scan" now correctly handles Unicode
characters. (stanton)
11/17/98 (new feature) "scan" now supports XPG3 position specifiers
and the "%n" conversion character. See the "scan" manual entry for
more details. (stanton)
11/17/98 (bug fix) The Tcl memory allocator now returns 8-byte aligned
chunks of memory which improves performance on Windows and avoids
crashes on other platforms. [Bug: 834] (stanton)
11/23/98 (bug fix) Applied various regular expression performance bug
fixes supplied by Henry Spencer. (stanton)
11/30/98 (bug fix) Fixed various thread related race conditions. [Bug:
880 & 607] (stanton)
11/30/98 (bug fix) Fixed a number of memory overflow and leak
bugs. [Bug: 584] (stanton)
12/1/98 (new feaure) Added support for Korean encodings. (stanton)
12/1/98 (feature change) Changed the Tcl_EvalObjv interface to remove
the string and length arguments.
*** POTENTIAL INCOMPATIBILITY with previous alpha releases ***
12/2/98 (bug fix) Fixed various bugs related to line feed
translation. [Bug: 887] (stanton)
12/4/98 (new feature) Added a message catalog facility to help with
localizing Tcl scripts. Thanks to Mark Harrison for contributing the
initial implementation of the "msgcat" package. (stanton)
12/7/98 (bug fix) The memory allocator was failing to update the
block list for large memory blocks that were reallocated into a
different address. [Bug: 933] (stanton)
----------------- Released 8.1b1, Dec 10 1998 -----------------------
12/22/98 (performance improvement) Improved the -command option of the
lsort command to better use the object system for improved
performance (about 5x speed up). Thanks to Syd Polk for suppling the
patch. [RFE: 726] (rjohnson)
2/10/99 (bug fix) Restored the Tcl_ObjSetVar2/Tcl_ObjGetVar2
interfaces from 8.0 and renamed the Tcl_GetObjVar2/Tcl_SetObjVar2
interfaces to Tcl_GetVar2Ex and Tcl_SetVar2Ex. This should provide
better compatibility with 8.0. (stanton)
*** POTENTIAL INCOMPATIBILITY with previous alpha/beta releases ***
2/10/99 (bug fix) Made the eval interfaces compatible with 8.0 by
renaming Tcl_EvalObj to Tcl_EvalObjEx, renaming Tcl_Eval2 to
Tcl_EvalEx and restoring Tcl_EvalObj and Tcl_GlobalEvalObj interfaces
so they match Tcl 8.0. (stanton)
*** POTENTIAL INCOMPATIBILITY with previous alpha/beta releases ***
2/25/99 (bug fix/new feature) On Windows, the channel drivers for
consoles and serial ports now completely support file events. (redman)
3/5/99 (bug fix) Integrated patches to fix various configure problems
that affected HP-UX-11, 64-bit IRIX, Linux, and Solaris. (stanton)
3/9/99 (bug fix) Integrated various AIX related patches to improve
support for shared libraries. (stanton)
3/9/99 (new feature) Added tcl_platform(user) to provide a portable
way to get the name of the current user. (welch)
3/9/99 (new feature) Integrated the stub library mechanism contributed
by Jan Nijtmans, Paul Duffin, and Jean-Claude Wippler. This feature
should make it possible to write extensions that support multiple
versions of Tcl simultaneously. It also makes it possible to
dynamically load extensions into statically linked interpreters. This
patch includes the following changes:
- Added a Tcl_InitStubs() interface
- Added Tcl_PkgProvideEx, Tcl_PkgRequireEx, Tcl_PkgPresentEx,
and Tcl_PkgPresent.
- Added va_list versions of all VARARGS functions so they can be
invoked from wrapper functions.
See the manual for more information. (stanton)
3/10/99 (feature change) Replaced Tcl_AlertNotifier with
Tcl_ThreadAlert since the Tcl_AlertNotifier function relied on passing
internal data structures. (stanton)
*** POTENTIAL INCOMPATIBILITY with previous alpha/beta releases ***
3/10/99 (new feature) Added a Tcl_GetVersion API to make it easier to
check the Tcl version and patch level from C. (redman)
3/14/99 (feature change) Tried to unify the TclpInitLibrary path
routines to look in similar places from Windows to UNIX. The new
library search path is: TCL_LIBRARY, TCL_LIBRARY/../tcl8.1, relative
to DLL (Windows Only) relative to installed executable, relative to
develop executable, and relative to compiled-in in location (UNIX
Only.) This fix included:
- Defining a TclpFindExecutable
- Moving Tcl_FindExecutable to a common area in tclEncoding.c
- Modifying the TclpInitLibraryPath routines.
(surles)
3/14/99 (feature change) Added hooks for TclPro Wrapper to initialize
the location of the encoding files and libraries. This fix included:
- Adding the TclSetPerInitScript routine.
- Modifying the Tcl_Init routines to evaluate the non-NULL
pre-init script.
- Adding the Tcl_SetdefaultEncodingDir and Tcl_GetDefaultEncodingDir
routines.
- Modifying the TclpInitLibrary routines to append the default
encoding dir.
(surles)
3/14/99 (feature change) Test suite now uses "test" namespace to
define the test procedure and other auxiliary procedures as well as
global variables.
- Global array testConfige is now called ::test::testConfig.
- Global variable VERBOSE is now called ::test::verbose, and
::test::verbose no longer works with numerical values. We've
switched to a bitwise character string. You can set
::test::verbose by using the -verbose option on the Tcl command
line.
- Global variable TESTS is now called ::test::matchingTests, and
can be set on the Tcl command line via the -match option.
- There is now a ::test::skipTests variable (works similarly to
::test::matchTests) that can be set on the Tcl command line via
the -match option.
- The test suite can now be run in any working directory. When
you run "make test", the working directory is nolonger switched
to ../tests.
(hirschl)
*** POTENTIAL INCOMPATIBILITY ***
--------------- Released 8.1b2, March 16, 1999 ----------------------
3/18/99 (bug fix) Fixed missing/incorrect characters in shift-jis table
(stanton)
3/18/99 (feature change) The glob command ignores the
FS_CASE_IS_PRESERVED bit on file systesm and always returns
exactly what it gets from the system. (stanton)
*** POTENTIAL INCOMPATIBILITY ***
3/19/99 (new feature) Added support for --enable-64bit. For now,
this is only supported on Solaris 7 64bit (SunOS 5.7) using the Sun
compiler. (redman)
3/23/99 (bug fix) Fixed fileevents and gets on Windows consoles and
serial devices so that non-blocking channels do not block on partial
input lines. (redman)
3/23/99 (bug fix) Added a new Tcl_ServiceModeHook interface.
This is used on Windows to avoid the various problems that people
have been seeing where the system hangs when tclsh is running
outside of the event loop. As part of this, renamed
TcapAlertNotifier back to Tcl_AlertNotifier since it is public.
(stanton)
3/23/99 (feature change) Test suite now uses "tcltest" namespace to
define the test procedure and other auxiliary procedures as well as
global variables. The previously chosen "test" namespace was thought
to be too generic and likely to create conflits.
(hirschl)
*** POTENTIAL INCOMPATIBILITY ***
3/24/99 (bug fix) Make sockets thread safe on Windows.
(redman)
3/24/99 (bug fix) Fix cases where expr would incorrect return
a floating point value instead of an integer. (stanton)
3/25/99 (bug fix) Added ASCII to big5 and gb2312 encodings.
(stanton)
3/25/99 (feature change) Changed so aliases are invoked at current
scope in the target interpreter instead of at the global scope. This
was an incompatibility introduced in 8.1 that is being removed.
(stanton)
*** POTENTIAL INCOMPATIBILITY with previous beta releases ***
3/26/99 (feature change) --enable-shared is now the default and build
Tcl as a shared library; specify --disable-shared to build a static Tcl
library and shell.
*** POTENTIAL INCOMPATIBILITY ***
3/29/99 (bug fix) Removed the stub functions and changed the stub
macros to just use the name without params. Pass &tclStubs into the
interp (don't use tclStubsPtr because of collisions with the stubs on
Solaris). (redman)
3/30/99 (bug fix) Loadable modules are now unloaded at the last
possible moment during Tcl_Finalize to fix various exit-time crashes.
(welch)
3/30/99 (bug fix) Tcl no longer calls setlocale(). It looks at
env(LANG) and env(LC_TYPE) instead. (stanton)
4/1/99 (bug fix) Fixed the Ultrix multiple symbol definition problem.
Now, even Tcl includes a copy of the Tcl stub library. (redman)
4/1/99 (bug fix) Internationalized the registry package.
4/1/99 (bug fix) Changed the implemenation of Tcl_ConditionWait and
Tcl_ConditionNotify on Windows. The new algorithm eliminates a race
condition and was suggested by Jim Davidson. (welch)
4/2/99 (new apis) Made various Unicode utility functions public.
Tcl_UtfToUniCharDString, Tcl_UniCharToUtfDString, Tcl_UniCharLen,
Tcl_UniCharNcmp, Tcl_UniCharIsAlnum, Tcl_UniCharIsAlpha,
Tcl_UniCharIsDigit, Tcl_UniCharIsLower, Tcl_UniCharIsSpace,
Tcl_UniCharIsUpper, Tcl_UniCharIsWordChar, Tcl_WinUtfToTChar,
Tcl_WinTCharToUtf (stanton)
4/2/99 (feature change) Add new DDE package and removed the Tk
send command from the Windows version. Changed DDE-based send
code into "dde eval" command. The DDE package can be loaded
into tclsh, not just wish. Windows only. (redman)
4/5/99 (bug fix) Changed safe-tcl so that the encoding command
is an alias that masks out the "encoding system" subcommand.
(redman)
4/5/99 (bug fix) Configure patches to improve support for
OS/390 and BSD/OS 4.*. (stanton)
4/5/99 (bug fix) Fixed crash in the clock command that occurred
with negative time values in timezones east of GMT. (stanton)
4/6/99 (bug fix) Moved the "array set" C level code into a common
routine (TclArraySet). The TclSetupEnv routine now uses this API to
create an env array w/ no elements. This fixes the bug caused when
every environ varaible is removed, and the Tcl env variable is
synched. If no environ vars existed, the Tcl env var would never be
created. (surles)
4/6/99 (bug fix) Made the Env module I18N compliant. (surles)
4/6/99 (bug fix) Changed the FindVariable routine to TclpFindVariable,
that now does a case insensitive string comparison on Windows, and not
on UNIX. (surles)
--------------- Released 8.1b3, April 6, 1999 ----------------------
4/9/99 (bug fix) Fixed notifier deadlock situation when the pipe used
to talk back notifier thread is filled with data. Found as a result of the
focus.test for Tk hanging. (redman)
4/13/99 (bug fix) Fixed bug where socket -async combined with
fileevent for writing did not work under Windows NT. (redman)
4/13/99 (encoding fix) Restored the double byte definition of GB2312
and added the EUC-CN encoding. EUC-CN is a variant of GB2312 that
shifts the characters into bytes with the high bit set and includes
ASCII as a subset. (stanton)
4/27/99 (bug fix) Added 'extern "C" {}' block around the stub table
pointer declaration so the stub library can be used from C++. (stanton)
--------------- Released 8.1 final, April 29, 1999 ----------------------
4/22/99 (bug fix) Changed Windows NT socket implementation to avoid
creating a communication window. This avoids the problem where the
system hangs waiting for tclsh to respond to a system-wide synchronous
broadcast (e.g. if you change system colors). (redman)
4/22/99 (bug fix) Added call to TclWinInit from TclpInitPlatform when
building a static library since DllMain will not be invoked. This
could break old code that explicitly called TclWinInit, but should be
simpler in the long run. (stanton)
*** POTENTIAL INCOMPATIBILITY ***
4/23/99 (bug fix) Added support for the koi8-r Cyrillic
encoding. [Bug: 1771] (stanton)
4/28/99 (bug fix) Changed internal Tcl_Obj usage to avoid freeing the