ChangeLog revision 33904
1 2 ChangeLog file for zlib 3 4Changes in 1.1.1 (27 Feb 98) 5- fix macros _tr_tally_* in deflate.h for debug mode (Glenn Randers-Pehrson) 6- remove block truncation heuristic which had very marginal effect for zlib 7 (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the 8 compression ratio on some files. This also allows inlining _tr_tally for 9 matches in deflate_slow. 10- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier) 11 12Changes in 1.1.0 (24 Feb 98) 13- do not return STREAM_END prematurely in inflate (John Bowler) 14- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler) 15- compile with -DFASTEST to get compression code optimized for speed only 16- in minigzip, try mmap'ing the input file first (Miguel Albrecht) 17- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain 18 on Sun but significant on HP) 19 20- add a pointer to experimental unzip library in README (Gilles Vollant) 21- initialize variable gcc in configure (Chris Herborth) 22 23Changes in 1.0.9 (17 Feb 1998) 24- added gzputs and gzgets functions 25- do not clear eof flag in gzseek (Mark Diekhans) 26- fix gzseek for files in transparent mode (Mark Diekhans) 27- do not assume that vsprintf returns the number of bytes written (Jens Krinke) 28- replace EXPORT with ZEXPORT to avoid conflict with other programs 29- added compress2 in zconf.h, zlib.def, zlib.dnt 30- new asm code from Gilles Vollant in contrib/asm386 31- simplify the inflate code (Mark): 32 . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new() 33 . ZALLOC the length list in inflate_trees_fixed() instead of using stack 34 . ZALLOC the value area for huft_build() instead of using stack 35 . Simplify Z_FINISH check in inflate() 36 37- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8 38- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi) 39- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with 40 the declaration of FAR (Gilles VOllant) 41- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann) 42- read_buf buf parameter of type Bytef* instead of charf* 43- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout) 44- do not redeclare unlink in minigzip.c for WIN32 (John Bowler) 45- fix check for presence of directories in "make install" (Ian Willis) 46 47Changes in 1.0.8 (27 Jan 1998) 48- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant) 49- fix gzgetc and gzputc for big endian systems (Markus Oberhumer) 50- added compress2() to allow setting the compression level 51- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong) 52- use constant arrays for the static trees in trees.c instead of computing 53 them at run time (thanks to Ken Raeburn for this suggestion). To create 54 trees.h, compile with GEN_TREES_H and run "make test". 55- check return code of example in "make test" and display result 56- pass minigzip command line options to file_compress 57- simplifying code of inflateSync to avoid gcc 2.8 bug 58 59- support CC="gcc -Wall" in configure -s (QingLong) 60- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn) 61- fix test for shared library support to avoid compiler warnings 62- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant) 63- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit) 64- do not use fdopen for Metrowerks on Mac (Brad Pettit)) 65- add checks for gzputc and gzputc in example.c 66- avoid warnings in gzio.c and deflate.c (Andreas Kleinert) 67- use const for the CRC table (Ken Raeburn) 68- fixed "make uninstall" for shared libraries 69- use Tracev instead of Trace in infblock.c 70- in example.c use correct compressed length for test_sync 71- suppress +vnocompatwarnings in configure for HPUX (not always supported) 72 73Changes in 1.0.7 (20 Jan 1998) 74- fix gzseek which was broken in write mode 75- return error for gzseek to negative absolute position 76- fix configure for Linux (Chun-Chung Chen) 77- increase stack space for MSC (Tim Wegner) 78- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant) 79- define EXPORTVA for gzprintf (Gilles Vollant) 80- added man page zlib.3 (Rick Rodgers) 81- for contrib/untgz, fix makedir() and improve Makefile 82 83- check gzseek in write mode in example.c 84- allocate extra buffer for seeks only if gzseek is actually called 85- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant) 86- add inflateSyncPoint in zconf.h 87- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def 88 89Changes in 1.0.6 (19 Jan 1998) 90- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and 91 gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code) 92- Fix a deflate bug occuring only with compression level 0 (thanks to 93 Andy Buckler for finding this one). 94- In minigzip, pass transparently also the first byte for .Z files. 95- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress() 96- check Z_FINISH in inflate (thanks to Marc Schluper) 97- Implement deflateCopy (thanks to Adam Costello) 98- make static libraries by default in configure, add --shared option. 99- move MSDOS or Windows specific files to directory msdos 100- suppress the notion of partial flush to simplify the interface 101 (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4) 102- suppress history buffer provided by application to simplify the interface 103 (this feature was not implemented anyway in 1.0.4) 104- next_in and avail_in must be initialized before calling inflateInit or 105 inflateInit2 106- add EXPORT in all exported functions (for Windows DLL) 107- added Makefile.nt (thanks to Stephen Williams) 108- added the unsupported "contrib" directory: 109 contrib/asm386/ by Gilles Vollant <info@winimage.com> 110 386 asm code replacing longest_match(). 111 contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu> 112 A C++ I/O streams interface to the zlib gz* functions 113 contrib/iostream2/ by Tyge L�vset <Tyge.Lovset@cmr.no> 114 Another C++ I/O streams interface 115 contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es> 116 A very simple tar.gz file extractor using zlib 117 contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl> 118 How to use compress(), uncompress() and the gz* functions from VB. 119- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression 120 level) in minigzip (thanks to Tom Lane) 121 122- use const for rommable constants in deflate 123- added test for gzseek and gztell in example.c 124- add undocumented function inflateSyncPoint() (hack for Paul Mackerras) 125- add undocumented function zError to convert error code to string 126 (for Tim Smithers) 127- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code. 128- Use default memcpy for Symantec MSDOS compiler. 129- Add EXPORT keyword for check_func (needed for Windows DLL) 130- add current directory to LD_LIBRARY_PATH for "make test" 131- create also a link for libz.so.1 132- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura) 133- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX) 134- added -soname for Linux in configure (Chun-Chung Chen, 135- assign numbers to the exported functions in zlib.def (for Windows DLL) 136- add advice in zlib.h for best usage of deflateSetDictionary 137- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn) 138- allow compilation with ANSI keywords only enabled for TurboC in large model 139- avoid "versionString"[0] (Borland bug) 140- add NEED_DUMMY_RETURN for Borland 141- use variable z_verbose for tracing in debug mode (Peter Deutsch). 142- allow compilation with CC 143- defined STDC for OS/2 (David Charlap) 144- limit external names to 8 chars for MVS (Thomas Lund) 145- in minigzip.c, use static buffers only for 16-bit systems 146- fix suffix check for "minigzip -d foo.gz" 147- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee) 148- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau) 149- added makelcc.bat for lcc-win32 (Tom St Denis) 150- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe) 151- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion. 152- check for unistd.h in configure (for off_t) 153- remove useless check parameter in inflate_blocks_free 154- avoid useless assignment of s->check to itself in inflate_blocks_new 155- do not flush twice in gzclose (thanks to Ken Raeburn) 156- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h 157- use NO_ERRNO_H instead of enumeration of operating systems with errno.h 158- work around buggy fclose on pipes for HP/UX 159- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson) 160- fix configure if CC is already equal to gcc 161 162Changes in 1.0.5 (3 Jan 98) 163- Fix inflate to terminate gracefully when fed corrupted or invalid data 164- Use const for rommable constants in inflate 165- Eliminate memory leaks on error conditions in inflate 166- Removed some vestigial code in inflate 167- Update web address in README 168 169Changes in 1.0.4 (24 Jul 96) 170- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF 171 bit, so the decompressor could decompress all the correct data but went 172 on to attempt decompressing extra garbage data. This affected minigzip too. 173- zlibVersion and gzerror return const char* (needed for DLL) 174- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno) 175- use z_error only for DEBUG (avoid problem with DLLs) 176 177Changes in 1.0.3 (2 Jul 96) 178- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS 179 small and medium models; this makes the library incompatible with previous 180 versions for these models. (No effect in large model or on other systems.) 181- return OK instead of BUF_ERROR if previous deflate call returned with 182 avail_out as zero but there is nothing to do 183- added memcmp for non STDC compilers 184- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly) 185- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO) 186- better check for 16-bit mode MSC (avoids problem with Symantec) 187 188Changes in 1.0.2 (23 May 96) 189- added Windows DLL support 190- added a function zlibVersion (for the DLL support) 191- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model) 192- Bytef is define's instead of typedef'd only for Borland C 193- avoid reading uninitialized memory in example.c 194- mention in README that the zlib format is now RFC1950 195- updated Makefile.dj2 196- added algorithm.doc 197 198Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion] 199- fix array overlay in deflate.c which sometimes caused bad compressed data 200- fix inflate bug with empty stored block 201- fix MSDOS medium model which was broken in 0.99 202- fix deflateParams() which could generated bad compressed data. 203- Bytef is define'd instead of typedef'ed (work around Borland bug) 204- added an INDEX file 205- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32), 206 Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas) 207- speed up adler32 for modern machines without auto-increment 208- added -ansi for IRIX in configure 209- static_init_done in trees.c is an int 210- define unlink as delete for VMS 211- fix configure for QNX 212- add configure branch for SCO and HPUX 213- avoid many warnings (unused variables, dead assignments, etc...) 214- no fdopen for BeOS 215- fix the Watcom fix for 32 bit mode (define FAR as empty) 216- removed redefinition of Byte for MKWERKS 217- work around an MWKERKS bug (incorrect merge of all .h files) 218 219Changes in 0.99 (27 Jan 96) 220- allow preset dictionary shared between compressor and decompressor 221- allow compression level 0 (no compression) 222- add deflateParams in zlib.h: allow dynamic change of compression level 223 and compression strategy. 224- test large buffers and deflateParams in example.c 225- add optional "configure" to build zlib as a shared library 226- suppress Makefile.qnx, use configure instead 227- fixed deflate for 64-bit systems (detected on Cray) 228- fixed inflate_blocks for 64-bit systems (detected on Alpha) 229- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2) 230- always return Z_BUF_ERROR when deflate() has nothing to do 231- deflateInit and inflateInit are now macros to allow version checking 232- prefix all global functions and types with z_ with -DZ_PREFIX 233- make falloc completely reentrant (inftrees.c) 234- fixed very unlikely race condition in ct_static_init 235- free in reverse order of allocation to help memory manager 236- use zlib-1.0/* instead of zlib/* inside the tar.gz 237- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith 238 -Wconversion -Wstrict-prototypes -Wmissing-prototypes" 239- allow gzread on concatenated .gz files 240- deflateEnd now returns Z_DATA_ERROR if it was premature 241- deflate is finally (?) fully deterministic (no matches beyond end of input) 242- Document Z_SYNC_FLUSH 243- add uninstall in Makefile 244- Check for __cpluplus in zlib.h 245- Better test in ct_align for partial flush 246- avoid harmless warnings for Borland C++ 247- initialize hash_head in deflate.c 248- avoid warning on fdopen (gzio.c) for HP cc -Aa 249- include stdlib.h for STDC compilers 250- include errno.h for Cray 251- ignore error if ranlib doesn't exist 252- call ranlib twice for NeXTSTEP 253- use exec_prefix instead of prefix for libz.a 254- renamed ct_* as _tr_* to avoid conflict with applications 255- clear z->msg in inflateInit2 before any error return 256- initialize opaque in example.c, gzio.c, deflate.c and inflate.c 257- fixed typo in zconf.h (_GNUC__ => __GNUC__) 258- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode) 259- fix typo in Make_vms.com (f$trnlnm -> f$getsyi) 260- in fcalloc, normalize pointer if size > 65520 bytes 261- don't use special fcalloc for 32 bit Borland C++ 262- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc... 263- use Z_BINARY instead of BINARY 264- document that gzclose after gzdopen will close the file 265- allow "a" as mode in gzopen. 266- fix error checking in gzread 267- allow skipping .gz extra-field on pipes 268- added reference to Perl interface in README 269- put the crc table in FAR data (I dislike more and more the medium model :) 270- added get_crc_table 271- added a dimension to all arrays (Borland C can't count). 272- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast 273- guard against multiple inclusion of *.h (for precompiled header on Mac) 274- Watcom C pretends to be Microsoft C small model even in 32 bit mode. 275- don't use unsized arrays to avoid silly warnings by Visual C++: 276 warning C4746: 'inflate_mask' : unsized array treated as '__far' 277 (what's wrong with far data in far model?). 278- define enum out of inflate_blocks_state to allow compilation with C++ 279 280Changes in 0.95 (16 Aug 95) 281- fix MSDOS small and medium model (now easier to adapt to any compiler) 282- inlined send_bits 283- fix the final (:-) bug for deflate with flush (output was correct but 284 not completely flushed in rare occasions). 285- default window size is same for compression and decompression 286 (it's now sufficient to set MAX_WBITS in zconf.h). 287- voidp -> voidpf and voidnp -> voidp (for consistency with other 288 typedefs and because voidnp was not near in large model). 289 290Changes in 0.94 (13 Aug 95) 291- support MSDOS medium model 292- fix deflate with flush (could sometimes generate bad output) 293- fix deflateReset (zlib header was incorrectly suppressed) 294- added support for VMS 295- allow a compression level in gzopen() 296- gzflush now calls fflush 297- For deflate with flush, flush even if no more input is provided. 298- rename libgz.a as libz.a 299- avoid complex expression in infcodes.c triggering Turbo C bug 300- work around a problem with gcc on Alpha (in INSERT_STRING) 301- don't use inline functions (problem with some gcc versions) 302- allow renaming of Byte, uInt, etc... with #define. 303- avoid warning about (unused) pointer before start of array in deflate.c 304- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c 305- avoid reserved word 'new' in trees.c 306 307Changes in 0.93 (25 June 95) 308- temporarily disable inline functions 309- make deflate deterministic 310- give enough lookahead for PARTIAL_FLUSH 311- Set binary mode for stdin/stdout in minigzip.c for OS/2 312- don't even use signed char in inflate (not portable enough) 313- fix inflate memory leak for segmented architectures 314 315Changes in 0.92 (3 May 95) 316- don't assume that char is signed (problem on SGI) 317- Clear bit buffer when starting a stored block 318- no memcpy on Pyramid 319- suppressed inftest.c 320- optimized fill_window, put longest_match inline for gcc 321- optimized inflate on stored blocks. 322- untabify all sources to simplify patches 323 324Changes in 0.91 (2 May 95) 325- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h 326- Document the memory requirements in zconf.h 327- added "make install" 328- fix sync search logic in inflateSync 329- deflate(Z_FULL_FLUSH) now works even if output buffer too short 330- after inflateSync, don't scare people with just "lo world" 331- added support for DJGPP 332 333Changes in 0.9 (1 May 95) 334- don't assume that zalloc clears the allocated memory (the TurboC bug 335 was Mark's bug after all :) 336- let again gzread copy uncompressed data unchanged (was working in 0.71) 337- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented 338- added a test of inflateSync in example.c 339- moved MAX_WBITS to zconf.h because users might want to change that. 340- document explicitly that zalloc(64K) on MSDOS must return a normalized 341 pointer (zero offset) 342- added Makefiles for Microsoft C, Turbo C, Borland C++ 343- faster crc32() 344 345Changes in 0.8 (29 April 95) 346- added fast inflate (inffast.c) 347- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this 348 is incompatible with previous versions of zlib which returned Z_OK. 349- work around a TurboC compiler bug (bad code for b << 0, see infutil.h) 350 (actually that was not a compiler bug, see 0.81 above) 351- gzread no longer reads one extra byte in certain cases 352- In gzio destroy(), don't reference a freed structure 353- avoid many warnings for MSDOS 354- avoid the ERROR symbol which is used by MS Windows 355 356Changes in 0.71 (14 April 95) 357- Fixed more MSDOS compilation problems :( There is still a bug with 358 TurboC large model. 359 360Changes in 0.7 (14 April 95) 361- Added full inflate support. 362- Simplified the crc32() interface. The pre- and post-conditioning 363 (one's complement) is now done inside crc32(). WARNING: this is 364 incompatible with previous versions; see zlib.h for the new usage. 365 366Changes in 0.61 (12 April 95) 367- workaround for a bug in TurboC. example and minigzip now work on MSDOS. 368 369Changes in 0.6 (11 April 95) 370- added minigzip.c 371- added gzdopen to reopen a file descriptor as gzFile 372- added transparent reading of non-gziped files in gzread. 373- fixed bug in gzread (don't read crc as data) 374- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose). 375- don't allocate big arrays in the stack (for MSDOS) 376- fix some MSDOS compilation problems 377 378Changes in 0.5: 379- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but 380 not yet Z_FULL_FLUSH. 381- support decompression but only in a single step (forced Z_FINISH) 382- added opaque object for zalloc and zfree. 383- added deflateReset and inflateReset 384- added a variable zlib_version for consistency checking. 385- renamed the 'filter' parameter of deflateInit2 as 'strategy'. 386 Added Z_FILTERED and Z_HUFFMAN_ONLY constants. 387 388Changes in 0.4: 389- avoid "zip" everywhere, use zlib instead of ziplib. 390- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush 391 if compression method == 8. 392- added adler32 and crc32 393- renamed deflateOptions as deflateInit2, call one or the other but not both 394- added the method parameter for deflateInit2. 395- added inflateInit2 396- simplied considerably deflateInit and inflateInit by not supporting 397 user-provided history buffer. This is supported only in deflateInit2 398 and inflateInit2. 399 400Changes in 0.3: 401- prefix all macro names with Z_ 402- use Z_FINISH instead of deflateEnd to finish compression. 403- added Z_HUFFMAN_ONLY 404- added gzerror() 405