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ChangeLog file for zlib
Changes in 1.1.4 (11 March 2002)- ZFREE was repeated on same allocation on some error conditions. This creates a security problem described in http://www.zlib.org/advisory-2002-03-11.txt- Returned incorrect error (Z_MEM_ERROR) on some invalid data- Avoid accesses before window for invalid distances with inflate window less than 32K.- force windowBits > 8 to avoid a bug in the encoder for a window size of 256 bytes. (A complete fix will be available in 1.1.5). Changes in 1.1.3 (9 July 1998)- fix "an inflate input buffer bug that shows up on rare but persistent occasions" (Mark)- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)- fix gzseek(..., SEEK_SET) in write mode- fix crc check after a gzeek (Frank Faubert)- fix miniunzip when the last entry in a zip file is itself a zip file (J Lillge)- add contrib/asm586 and contrib/asm686 (Brian Raiter) See http://www.muppetlabs.com/~breadbox/software/assembly.html- add support for Delphi 3 in contrib/delphi (Bob Dellaca)- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)- added a FAQ file
- Support gzdopen on Mac with Metrowerks (Jason Linhart)- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)- avoid some warnings with Borland C (Tom Tanner)- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)- emulate utime() for WIN32 in contrib/untgz (Gilles Vollant)- allow several arguments to configure (Tim Mooney, Frodo Looijaard)- use libdir and includedir in Makefile.in (Tim Mooney)- support shared libraries on OSF1 V4 (Tim Mooney)- remove so_locations in "make clean" (Tim Mooney)- fix maketree.c compilation error (Glenn, Mark)- Python interface to zlib now in Python 1.5 (Jeremy Hylton)- new Makefile.riscos (Rich Walker)- initialize static descriptors in trees.c for embedded targets (Nick Smith)- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)- add the OS/2 files in Makefile.in too (Andrew Zabolotny)- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)- fix maketree.c to allow clean compilation of inffixed.h (Mark)- fix parameter check in deflateCopy (Gunther Nikl)- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)- Many portability patches by Christian Spieler: . zutil.c, zutil.h: added "const" for zmem* . Make_vms.com: fixed some typos . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists . msdos/Makefile.msc: remove "default rtl link library" info from obj files . msdos/Makefile.*: use model-dependent name for the built zlib library . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc: new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)- replace __far with _far for better portability (Christian Spieler, Tom Lane)- fix test for errno.h in configure (Tim Newsham)
Changes in 1.1.2 (19 March 98)- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant) See http://www.winimage.com/zLibDll/unzip.html- preinitialize the inflate tables for fixed codes, to make the code completely thread safe (Mark)- some simplifications and slight speed-up to the inflate code (Mark)- fix gzeof on non-compressed files (Allan Schrum)- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)- do not wrap extern "C" around system includes (Tom Lane)- mention zlib binding for TCL in README (Andreas Kupries)- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)- allow "configure --prefix $HOME" (Tim Mooney)- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)- move Makefile.sas to amiga/Makefile.sas
Changes in 1.1.1 (27 Feb 98)- fix macros _tr_tally_* in deflate.h for debug mode (Glenn Randers-Pehrson)- remove block truncation heuristic which had very marginal effect for zlib (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the compression ratio on some files. This also allows inlining _tr_tally for matches in deflate_slow.- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
Changes in 1.1.0 (24 Feb 98)- do not return STREAM_END prematurely in inflate (John Bowler)- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)- compile with -DFASTEST to get compression code optimized for speed only- in minigzip, try mmap'ing the input file first (Miguel Albrecht)- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain on Sun but significant on HP)
- add a pointer to experimental unzip library in README (Gilles Vollant)- initialize variable gcc in configure (Chris Herborth)
Changes in 1.0.9 (17 Feb 1998)- added gzputs and gzgets functions- do not clear eof flag in gzseek (Mark Diekhans)- fix gzseek for files in transparent mode (Mark Diekhans)- do not assume that vsprintf returns the number of bytes written (Jens Krinke)- replace EXPORT with ZEXPORT to avoid conflict with other programs- added compress2 in zconf.h, zlib.def, zlib.dnt- new asm code from Gilles Vollant in contrib/asm386- simplify the inflate code (Mark): . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new() . ZALLOC the length list in inflate_trees_fixed() instead of using stack . ZALLOC the value area for huft_build() instead of using stack . Simplify Z_FINISH check in inflate()
- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with the declaration of FAR (Gilles VOllant)- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)- read_buf buf parameter of type Bytef* instead of charf*- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)- fix check for presence of directories in "make install" (Ian Willis)
Changes in 1.0.8 (27 Jan 1998)- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)- added compress2() to allow setting the compression level- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)- use constant arrays for the static trees in trees.c instead of computing them at run time (thanks to Ken Raeburn for this suggestion). To create trees.h, compile with GEN_TREES_H and run "make test".- check return code of example in "make test" and display result- pass minigzip command line options to file_compress- simplifying code of inflateSync to avoid gcc 2.8 bug
- support CC="gcc -Wall" in configure -s (QingLong)- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)- fix test for shared library support to avoid compiler warnings- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)- do not use fdopen for Metrowerks on Mac (Brad Pettit))- add checks for gzputc and gzputc in example.c- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)- use const for the CRC table (Ken Raeburn)- fixed "make uninstall" for shared libraries- use Tracev instead of Trace in infblock.c- in example.c use correct compressed length for test_sync- suppress +vnocompatwarnings in configure for HPUX (not always supported)
Changes in 1.0.7 (20 Jan 1998)- fix gzseek which was broken in write mode- return error for gzseek to negative absolute position- fix configure for Linux (Chun-Chung Chen)- increase stack space for MSC (Tim Wegner)- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)- define EXPORTVA for gzprintf (Gilles Vollant)- added man page zlib.3 (Rick Rodgers)- for contrib/untgz, fix makedir() and improve Makefile
- check gzseek in write mode in example.c- allocate extra buffer for seeks only if gzseek is actually called- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)- add inflateSyncPoint in zconf.h- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
Changes in 1.0.6 (19 Jan 1998)- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)- Fix a deflate bug occuring only with compression level 0 (thanks to Andy Buckler for finding this one).- In minigzip, pass transparently also the first byte for .Z files.- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()- check Z_FINISH in inflate (thanks to Marc Schluper)- Implement deflateCopy (thanks to Adam Costello)- make static libraries by default in configure, add --shared option.- move MSDOS or Windows specific files to directory msdos- suppress the notion of partial flush to simplify the interface (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)- suppress history buffer provided by application to simplify the interface (this feature was not implemented anyway in 1.0.4)- next_in and avail_in must be initialized before calling inflateInit or inflateInit2- add EXPORT in all exported functions (for Windows DLL)- added Makefile.nt (thanks to Stephen Williams)- added the unsupported "contrib" directory: contrib/asm386/ by Gilles Vollant <[email protected]> 386 asm code replacing longest_match(). contrib/iostream/ by Kevin Ruland <[email protected]> A C++ I/O streams interface to the zlib gz* functions contrib/iostream2/ by Tyge L�vset <[email protected]> Another C++ I/O streams interface contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <[email protected]> A very simple tar.gz file extractor using zlib contrib/visual-basic.txt by Carlos Rios <[email protected]> How to use compress(), uncompress() and the gz* functions from VB.- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression level) in minigzip (thanks to Tom Lane)
- use const for rommable constants in deflate- added test for gzseek and gztell in example.c- add undocumented function inflateSyncPoint() (hack for Paul Mackerras)- add undocumented function zError to convert error code to string (for Tim Smithers)- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.- Use default memcpy for Symantec MSDOS compiler.- Add EXPORT keyword for check_func (needed for Windows DLL)- add current directory to LD_LIBRARY_PATH for "make test"- create also a link for libz.so.1- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)- added -soname for Linux in configure (Chun-Chung Chen,- assign numbers to the exported functions in zlib.def (for Windows DLL)- add advice in zlib.h for best usage of deflateSetDictionary- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)- allow compilation with ANSI keywords only enabled for TurboC in large model- avoid "versionString"[0] (Borland bug)- add NEED_DUMMY_RETURN for Borland- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).- allow compilation with CC- defined STDC for OS/2 (David Charlap) - limit external names to 8 chars for MVS (Thomas Lund)- in minigzip.c, use static buffers only for 16-bit systems- fix suffix check for "minigzip -d foo.gz"- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)- added makelcc.bat for lcc-win32 (Tom St Denis)- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.- check for unistd.h in configure (for off_t)- remove useless check parameter in inflate_blocks_free- avoid useless assignment of s->check to itself in inflate_blocks_new- do not flush twice in gzclose (thanks to Ken Raeburn)- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h- use NO_ERRNO_H instead of enumeration of operating systems with errno.h- work around buggy fclose on pipes for HP/UX- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)- fix configure if CC is already equal to gcc
Changes in 1.0.5 (3 Jan 98)- Fix inflate to terminate gracefully when fed corrupted or invalid data- Use const for rommable constants in inflate- Eliminate memory leaks on error conditions in inflate- Removed some vestigial code in inflate- Update web address in README Changes in 1.0.4 (24 Jul 96)- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF bit, so the decompressor could decompress all the correct data but went on to attempt decompressing extra garbage data. This affected minigzip too.- zlibVersion and gzerror return const char* (needed for DLL)- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)- use z_error only for DEBUG (avoid problem with DLLs)
Changes in 1.0.3 (2 Jul 96)- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS small and medium models; this makes the library incompatible with previous versions for these models. (No effect in large model or on other systems.)- return OK instead of BUF_ERROR if previous deflate call returned with avail_out as zero but there is nothing to do- added memcmp for non STDC compilers- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)- better check for 16-bit mode MSC (avoids problem with Symantec)
Changes in 1.0.2 (23 May 96)- added Windows DLL support- added a function zlibVersion (for the DLL support)- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)- Bytef is define's instead of typedef'd only for Borland C- avoid reading uninitialized memory in example.c- mention in README that the zlib format is now RFC1950- updated Makefile.dj2- added algorithm.doc
Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]- fix array overlay in deflate.c which sometimes caused bad compressed data- fix inflate bug with empty stored block- fix MSDOS medium model which was broken in 0.99- fix deflateParams() which could generated bad compressed data.- Bytef is define'd instead of typedef'ed (work around Borland bug)- added an INDEX file- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32), Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)- speed up adler32 for modern machines without auto-increment- added -ansi for IRIX in configure- static_init_done in trees.c is an int- define unlink as delete for VMS- fix configure for QNX- add configure branch for SCO and HPUX- avoid many warnings (unused variables, dead assignments, etc...)- no fdopen for BeOS- fix the Watcom fix for 32 bit mode (define FAR as empty)- removed redefinition of Byte for MKWERKS- work around an MWKERKS bug (incorrect merge of all .h files)
Changes in 0.99 (27 Jan 96)- allow preset dictionary shared between compressor and decompressor- allow compression level 0 (no compression)- add deflateParams in zlib.h: allow dynamic change of compression level and compression strategy.- test large buffers and deflateParams in example.c- add optional "configure" to build zlib as a shared library- suppress Makefile.qnx, use configure instead- fixed deflate for 64-bit systems (detected on Cray)- fixed inflate_blocks for 64-bit systems (detected on Alpha)- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)- always return Z_BUF_ERROR when deflate() has nothing to do- deflateInit and inflateInit are now macros to allow version checking- prefix all global functions and types with z_ with -DZ_PREFIX- make falloc completely reentrant (inftrees.c)- fixed very unlikely race condition in ct_static_init- free in reverse order of allocation to help memory manager- use zlib-1.0/* instead of zlib/* inside the tar.gz- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion -Wstrict-prototypes -Wmissing-prototypes"- allow gzread on concatenated .gz files- deflateEnd now returns Z_DATA_ERROR if it was premature- deflate is finally (?) fully deterministic (no matches beyond end of input)- Document Z_SYNC_FLUSH- add uninstall in Makefile- Check for __cpluplus in zlib.h- Better test in ct_align for partial flush- avoid harmless warnings for Borland C++- initialize hash_head in deflate.c- avoid warning on fdopen (gzio.c) for HP cc -Aa- include stdlib.h for STDC compilers- include errno.h for Cray- ignore error if ranlib doesn't exist- call ranlib twice for NeXTSTEP- use exec_prefix instead of prefix for libz.a- renamed ct_* as _tr_* to avoid conflict with applications- clear z->msg in inflateInit2 before any error return- initialize opaque in example.c, gzio.c, deflate.c and inflate.c- fixed typo in zconf.h (_GNUC__ => __GNUC__)- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)- fix typo in Make_vms.com (f$trnlnm -> f$getsyi)- in fcalloc, normalize pointer if size > 65520 bytes- don't use special fcalloc for 32 bit Borland C++- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...- use Z_BINARY instead of BINARY- document that gzclose after gzdopen will close the file- allow "a" as mode in gzopen.- fix error checking in gzread- allow skipping .gz extra-field on pipes- added reference to Perl interface in README- put the crc table in FAR data (I dislike more and more the medium model :)- added get_crc_table- added a dimension to all arrays (Borland C can't count).- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast- guard against multiple inclusion of *.h (for precompiled header on Mac)- Watcom C pretends to be Microsoft C small model even in 32 bit mode.- don't use unsized arrays to avoid silly warnings by Visual C++: warning C4746: 'inflate_mask' : unsized array treated as '__far' (what's wrong with far data in far model?).- define enum out of inflate_blocks_state to allow compilation with C++
Changes in 0.95 (16 Aug 95)- fix MSDOS small and medium model (now easier to adapt to any compiler)- inlined send_bits- fix the final (:-) bug for deflate with flush (output was correct but not completely flushed in rare occasions).- default window size is same for compression and decompression (it's now sufficient to set MAX_WBITS in zconf.h).- voidp -> voidpf and voidnp -> voidp (for consistency with other typedefs and because voidnp was not near in large model).
Changes in 0.94 (13 Aug 95)- support MSDOS medium model- fix deflate with flush (could sometimes generate bad output)- fix deflateReset (zlib header was incorrectly suppressed)- added support for VMS- allow a compression level in gzopen()- gzflush now calls fflush- For deflate with flush, flush even if no more input is provided.- rename libgz.a as libz.a- avoid complex expression in infcodes.c triggering Turbo C bug- work around a problem with gcc on Alpha (in INSERT_STRING)- don't use inline functions (problem with some gcc versions)- allow renaming of Byte, uInt, etc... with #define.- avoid warning about (unused) pointer before start of array in deflate.c- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c- avoid reserved word 'new' in trees.c
Changes in 0.93 (25 June 95)- temporarily disable inline functions- make deflate deterministic- give enough lookahead for PARTIAL_FLUSH- Set binary mode for stdin/stdout in minigzip.c for OS/2- don't even use signed char in inflate (not portable enough)- fix inflate memory leak for segmented architectures
Changes in 0.92 (3 May 95)- don't assume that char is signed (problem on SGI)- Clear bit buffer when starting a stored block- no memcpy on Pyramid- suppressed inftest.c- optimized fill_window, put longest_match inline for gcc- optimized inflate on stored blocks.- untabify all sources to simplify patches
Changes in 0.91 (2 May 95)- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h- Document the memory requirements in zconf.h- added "make install"- fix sync search logic in inflateSync- deflate(Z_FULL_FLUSH) now works even if output buffer too short- after inflateSync, don't scare people with just "lo world"- added support for DJGPP
Changes in 0.9 (1 May 95)- don't assume that zalloc clears the allocated memory (the TurboC bug was Mark's bug after all :)- let again gzread copy uncompressed data unchanged (was working in 0.71)- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented- added a test of inflateSync in example.c- moved MAX_WBITS to zconf.h because users might want to change that.- document explicitly that zalloc(64K) on MSDOS must return a normalized pointer (zero offset)- added Makefiles for Microsoft C, Turbo C, Borland C++- faster crc32()
Changes in 0.8 (29 April 95)- added fast inflate (inffast.c)- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this is incompatible with previous versions of zlib which returned Z_OK.- work around a TurboC compiler bug (bad code for b << 0, see infutil.h) (actually that was not a compiler bug, see 0.81 above)- gzread no longer reads one extra byte in certain cases- In gzio destroy(), don't reference a freed structure- avoid many warnings for MSDOS- avoid the ERROR symbol which is used by MS Windows
Changes in 0.71 (14 April 95)- Fixed more MSDOS compilation problems :( There is still a bug with TurboC large model.
Changes in 0.7 (14 April 95)- Added full inflate support.- Simplified the crc32() interface. The pre- and post-conditioning (one's complement) is now done inside crc32(). WARNING: this is incompatible with previous versions; see zlib.h for the new usage.
Changes in 0.61 (12 April 95)- workaround for a bug in TurboC. example and minigzip now work on MSDOS.
Changes in 0.6 (11 April 95)- added minigzip.c- added gzdopen to reopen a file descriptor as gzFile- added transparent reading of non-gziped files in gzread.- fixed bug in gzread (don't read crc as data)- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).- don't allocate big arrays in the stack (for MSDOS)- fix some MSDOS compilation problems
Changes in 0.5:- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but not yet Z_FULL_FLUSH.- support decompression but only in a single step (forced Z_FINISH)- added opaque object for zalloc and zfree.- added deflateReset and inflateReset- added a variable zlib_version for consistency checking.- renamed the 'filter' parameter of deflateInit2 as 'strategy'. Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
Changes in 0.4:- avoid "zip" everywhere, use zlib instead of ziplib.- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush if compression method == 8.- added adler32 and crc32- renamed deflateOptions as deflateInit2, call one or the other but not both- added the method parameter for deflateInit2.- added inflateInit2- simplied considerably deflateInit and inflateInit by not supporting user-provided history buffer. This is supported only in deflateInit2 and inflateInit2.
Changes in 0.3:- prefix all macro names with Z_- use Z_FINISH instead of deflateEnd to finish compression.- added Z_HUFFMAN_ONLY- added gzerror()
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