Annotation of embedaddon/rsync/zlib/ChangeLog, revision 1.1.1.1

1.1       misho       1: 
                      2:                 ChangeLog file for zlib
                      3: 
                      4: Changes in 1.2.3 (18 July 2005)
                      5: - Apply security vulnerability fixes to contrib/infback9 as well
                      6: - Clean up some text files (carriage returns, trailing space)
                      7: - Update testzlib, vstudio, masmx64, and masmx86 in contrib [Vollant]
                      8: 
                      9: Changes in 1.2.2.4 (11 July 2005)
                     10: - Add inflatePrime() function for starting inflation at bit boundary
                     11: - Avoid some Visual C warnings in deflate.c
                     12: - Avoid more silly Visual C warnings in inflate.c and inftrees.c for 64-bit
                     13:   compile
                     14: - Fix some spelling errors in comments [Betts]
                     15: - Correct inflateInit2() error return documentation in zlib.h
                     16: - Added zran.c example of compressed data random access to examples
                     17:   directory, shows use of inflatePrime()
                     18: - Fix cast for assignments to strm->state in inflate.c and infback.c
                     19: - Fix zlibCompileFlags() in zutil.c to use 1L for long shifts [Oberhumer]
                     20: - Move declarations of gf2 functions to right place in crc32.c [Oberhumer]
                     21: - Add cast in trees.c t avoid a warning [Oberhumer]
                     22: - Avoid some warnings in fitblk.c, gun.c, gzjoin.c in examples [Oberhumer]
                     23: - Update make_vms.com [Zinser]
                     24: - Initialize state->write in inflateReset() since copied in inflate_fast()
                     25: - Be more strict on incomplete code sets in inflate_table() and increase
                     26:   ENOUGH and MAXD -- this repairs a possible security vulnerability for
                     27:   invalid inflate input.  Thanks to Tavis Ormandy and Markus Oberhumer for
                     28:   discovering the vulnerability and providing test cases.
                     29: - Add ia64 support to configure for HP-UX [Smith]
                     30: - Add error return to gzread() for format or i/o error [Levin]
                     31: - Use malloc.h for OS/2 [Necasek]
                     32: 
                     33: Changes in 1.2.2.3 (27 May 2005)
                     34: - Replace 1U constants in inflate.c and inftrees.c for 64-bit compile
                     35: - Typecast fread() return values in gzio.c [Vollant]
                     36: - Remove trailing space in minigzip.c outmode (VC++ can't deal with it)
                     37: - Fix crc check bug in gzread() after gzungetc() [Heiner]
                     38: - Add the deflateTune() function to adjust internal compression parameters
                     39: - Add a fast gzip decompressor, gun.c, to examples (use of inflateBack)
                     40: - Remove an incorrect assertion in examples/zpipe.c
                     41: - Add C++ wrapper in infback9.h [Donais]
                     42: - Fix bug in inflateCopy() when decoding fixed codes
                     43: - Note in zlib.h how much deflateSetDictionary() actually uses
                     44: - Remove USE_DICT_HEAD in deflate.c (would mess up inflate if used)
                     45: - Add _WIN32_WCE to define WIN32 in zconf.in.h [Spencer]
                     46: - Don't include stderr.h or errno.h for _WIN32_WCE in zutil.h [Spencer]
                     47: - Add gzdirect() function to indicate transparent reads
                     48: - Update contrib/minizip [Vollant]
                     49: - Fix compilation of deflate.c when both ASMV and FASTEST [Oberhumer]
                     50: - Add casts in crc32.c to avoid warnings [Oberhumer]
                     51: - Add contrib/masmx64 [Vollant]
                     52: - Update contrib/asm586, asm686, masmx86, testzlib, vstudio [Vollant]
                     53: 
                     54: Changes in 1.2.2.2 (30 December 2004)
                     55: - Replace structure assignments in deflate.c and inflate.c with zmemcpy to
                     56:   avoid implicit memcpy calls (portability for no-library compilation)
                     57: - Increase sprintf() buffer size in gzdopen() to allow for large numbers
                     58: - Add INFLATE_STRICT to check distances against zlib header
                     59: - Improve WinCE errno handling and comments [Chang]
                     60: - Remove comment about no gzip header processing in FAQ
                     61: - Add Z_FIXED strategy option to deflateInit2() to force fixed trees
                     62: - Add updated make_vms.com [Coghlan], update README
                     63: - Create a new "examples" directory, move gzappend.c there, add zpipe.c,
                     64:   fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html.
                     65: - Add FAQ entry and comments in deflate.c on uninitialized memory access
                     66: - Add Solaris 9 make options in configure [Gilbert]
                     67: - Allow strerror() usage in gzio.c for STDC
                     68: - Fix DecompressBuf in contrib/delphi/ZLib.pas [ManChesTer]
                     69: - Update contrib/masmx86/inffas32.asm and gvmat32.asm [Vollant]
                     70: - Use z_off_t for adler32_combine() and crc32_combine() lengths
                     71: - Make adler32() much faster for small len
                     72: - Use OS_CODE in deflate() default gzip header
                     73: 
                     74: Changes in 1.2.2.1 (31 October 2004)
                     75: - Allow inflateSetDictionary() call for raw inflate
                     76: - Fix inflate header crc check bug for file names and comments
                     77: - Add deflateSetHeader() and gz_header structure for custom gzip headers
                     78: - Add inflateGetheader() to retrieve gzip headers
                     79: - Add crc32_combine() and adler32_combine() functions
                     80: - Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
                     81: - Use zstreamp consistently in zlib.h (inflate_back functions)
                     82: - Remove GUNZIP condition from definition of inflate_mode in inflate.h
                     83:   and in contrib/inflate86/inffast.S [Truta, Anderson]
                     84: - Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
                     85: - Update projects/README.projects and projects/visualc6 [Truta]
                     86: - Update win32/DLL_FAQ.txt [Truta]
                     87: - Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
                     88: - Deprecate Z_ASCII; use Z_TEXT instead [Truta]
                     89: - Use a new algorithm for setting strm->data_type in trees.c [Truta]
                     90: - Do not define an exit() prototype in zutil.c unless DEBUG defined
                     91: - Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
                     92: - Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
                     93: - Fix Darwin build version identification [Peterson]
                     94: 
                     95: Changes in 1.2.2 (3 October 2004)
                     96: - Update zlib.h comments on gzip in-memory processing
                     97: - Set adler to 1 in inflateReset() to support Java test suite [Walles]
                     98: - Add contrib/dotzlib [Ravn]
                     99: - Update win32/DLL_FAQ.txt [Truta]
                    100: - Update contrib/minizip [Vollant]
                    101: - Move contrib/visual-basic.txt to old/ [Truta]
                    102: - Fix assembler builds in projects/visualc6/ [Truta]
                    103: 
                    104: Changes in 1.2.1.2 (9 September 2004)
                    105: - Update INDEX file
                    106: - Fix trees.c to update strm->data_type (no one ever noticed!)
                    107: - Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
                    108: - Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
                    109: - Add limited multitasking protection to DYNAMIC_CRC_TABLE
                    110: - Add NO_vsnprintf for VMS in zutil.h [Mozilla]
                    111: - Don't declare strerror() under VMS [Mozilla]
                    112: - Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
                    113: - Update contrib/ada [Anisimkov]
                    114: - Update contrib/minizip [Vollant]
                    115: - Fix configure to not hardcode directories for Darwin [Peterson]
                    116: - Fix gzio.c to not return error on empty files [Brown]
                    117: - Fix indentation; update version in contrib/delphi/ZLib.pas and
                    118:   contrib/pascal/zlibpas.pas [Truta]
                    119: - Update mkasm.bat in contrib/masmx86 [Truta]
                    120: - Update contrib/untgz [Truta]
                    121: - Add projects/README.projects [Truta]
                    122: - Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
                    123: - Update win32/DLL_FAQ.txt [Truta]
                    124: - Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
                    125: - Remove an unnecessary assignment to curr in inftrees.c [Truta]
                    126: - Add OS/2 to exe builds in configure [Poltorak]
                    127: - Remove err dummy parameter in zlib.h [Kientzle]
                    128: 
                    129: Changes in 1.2.1.1 (9 January 2004)
                    130: - Update email address in README
                    131: - Several FAQ updates
                    132: - Fix a big fat bug in inftrees.c that prevented decoding valid
                    133:   dynamic blocks with only literals and no distance codes --
                    134:   Thanks to "Hot Emu" for the bug report and sample file
                    135: - Add a note to puff.c on no distance codes case.
                    136: 
                    137: Changes in 1.2.1 (17 November 2003)
                    138: - Remove a tab in contrib/gzappend/gzappend.c
                    139: - Update some interfaces in contrib for new zlib functions
                    140: - Update zlib version number in some contrib entries
                    141: - Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
                    142: - Support shared libraries on Hurd and KFreeBSD [Brown]
                    143: - Fix error in NO_DIVIDE option of adler32.c
                    144: 
                    145: Changes in 1.2.0.8 (4 November 2003)
                    146: - Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
                    147: - Add experimental NO_DIVIDE #define in adler32.c
                    148:     - Possibly faster on some processors (let me know if it is)
                    149: - Correct Z_BLOCK to not return on first inflate call if no wrap
                    150: - Fix strm->data_type on inflate() return to correctly indicate EOB
                    151: - Add deflatePrime() function for appending in the middle of a byte
                    152: - Add contrib/gzappend for an example of appending to a stream
                    153: - Update win32/DLL_FAQ.txt [Truta]
                    154: - Delete Turbo C comment in README [Truta]
                    155: - Improve some indentation in zconf.h [Truta]
                    156: - Fix infinite loop on bad input in configure script [Church]
                    157: - Fix gzeof() for concatenated gzip files [Johnson]
                    158: - Add example to contrib/visual-basic.txt [Michael B.]
                    159: - Add -p to mkdir's in Makefile.in [vda]
                    160: - Fix configure to properly detect presence or lack of printf functions
                    161: - Add AS400 support [Monnerat]
                    162: - Add a little Cygwin support [Wilson]
                    163: 
                    164: Changes in 1.2.0.7 (21 September 2003)
                    165: - Correct some debug formats in contrib/infback9
                    166: - Cast a type in a debug statement in trees.c
                    167: - Change search and replace delimiter in configure from % to # [Beebe]
                    168: - Update contrib/untgz to 0.2 with various fixes [Truta]
                    169: - Add build support for Amiga [Nikl]
                    170: - Remove some directories in old that have been updated to 1.2
                    171: - Add dylib building for Mac OS X in configure and Makefile.in
                    172: - Remove old distribution stuff from Makefile
                    173: - Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
                    174: - Update links in README
                    175: 
                    176: Changes in 1.2.0.6 (13 September 2003)
                    177: - Minor FAQ updates
                    178: - Update contrib/minizip to 1.00 [Vollant]
                    179: - Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
                    180: - Update POSTINC comment for 68060 [Nikl]
                    181: - Add contrib/infback9 with deflate64 decoding (unsupported)
                    182: - For MVS define NO_vsnprintf and undefine FAR [van Burik]
                    183: - Add pragma for fdopen on MVS [van Burik]
                    184: 
                    185: Changes in 1.2.0.5 (8 September 2003)
                    186: - Add OF to inflateBackEnd() declaration in zlib.h
                    187: - Remember start when using gzdopen in the middle of a file
                    188: - Use internal off_t counters in gz* functions to properly handle seeks
                    189: - Perform more rigorous check for distance-too-far in inffast.c
                    190: - Add Z_BLOCK flush option to return from inflate at block boundary
                    191: - Set strm->data_type on return from inflate
                    192:     - Indicate bits unused, if at block boundary, and if in last block
                    193: - Replace size_t with ptrdiff_t in crc32.c, and check for correct size
                    194: - Add condition so old NO_DEFLATE define still works for compatibility
                    195: - FAQ update regarding the Windows DLL [Truta]
                    196: - INDEX update: add qnx entry, remove aix entry [Truta]
                    197: - Install zlib.3 into mandir [Wilson]
                    198: - Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
                    199: - Adapt the zlib interface to the new DLL convention guidelines [Truta]
                    200: - Introduce ZLIB_WINAPI macro to allow the export of functions using
                    201:   the WINAPI calling convention, for Visual Basic [Vollant, Truta]
                    202: - Update msdos and win32 scripts and makefiles [Truta]
                    203: - Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
                    204: - Add contrib/ada [Anisimkov]
                    205: - Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
                    206: - Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
                    207: - Add contrib/masm686 [Truta]
                    208: - Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
                    209:   [Truta, Vollant]
                    210: - Update contrib/delphi; rename to contrib/pascal; add example [Truta]
                    211: - Remove contrib/delphi2; add a new contrib/delphi [Truta]
                    212: - Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
                    213:   and fix some method prototypes [Truta]
                    214: - Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
                    215:   [Truta]
                    216: - Avoid the use of backslash (\) in contrib/minizip [Vollant]
                    217: - Fix file time handling in contrib/untgz; update makefiles [Truta]
                    218: - Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
                    219:   [Vollant]
                    220: - Remove contrib/vstudio/vc15_16 [Vollant]
                    221: - Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
                    222: - Update README.contrib [Truta]
                    223: - Invert the assignment order of match_head and s->prev[...] in
                    224:   INSERT_STRING [Truta]
                    225: - Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
                    226:   [Truta]
                    227: - Compare function pointers with 0, not with NULL or Z_NULL [Truta]
                    228: - Fix prototype of syncsearch in inflate.c [Truta]
                    229: - Introduce ASMINF macro to be enabled when using an ASM implementation
                    230:   of inflate_fast [Truta]
                    231: - Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
                    232: - Modify test_gzio in example.c to take a single file name as a
                    233:   parameter [Truta]
                    234: - Exit the example.c program if gzopen fails [Truta]
                    235: - Add type casts around strlen in example.c [Truta]
                    236: - Remove casting to sizeof in minigzip.c; give a proper type
                    237:   to the variable compared with SUFFIX_LEN [Truta]
                    238: - Update definitions of STDC and STDC99 in zconf.h [Truta]
                    239: - Synchronize zconf.h with the new Windows DLL interface [Truta]
                    240: - Use SYS16BIT instead of __32BIT__ to distinguish between
                    241:   16- and 32-bit platforms [Truta]
                    242: - Use far memory allocators in small 16-bit memory models for
                    243:   Turbo C [Truta]
                    244: - Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
                    245:   zlibCompileFlags [Truta]
                    246: - Cygwin has vsnprintf [Wilson]
                    247: - In Windows16, OS_CODE is 0, as in MSDOS [Truta]
                    248: - In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
                    249: 
                    250: Changes in 1.2.0.4 (10 August 2003)
                    251: - Minor FAQ updates
                    252: - Be more strict when checking inflateInit2's windowBits parameter
                    253: - Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
                    254: - Add gzip wrapper option to deflateInit2 using windowBits
                    255: - Add updated QNX rule in configure and qnx directory [Bonnefoy]
                    256: - Make inflate distance-too-far checks more rigorous
                    257: - Clean up FAR usage in inflate
                    258: - Add casting to sizeof() in gzio.c and minigzip.c
                    259: 
                    260: Changes in 1.2.0.3 (19 July 2003)
                    261: - Fix silly error in gzungetc() implementation [Vollant]
                    262: - Update contrib/minizip and contrib/vstudio [Vollant]
                    263: - Fix printf format in example.c
                    264: - Correct cdecl support in zconf.in.h [Anisimkov]
                    265: - Minor FAQ updates
                    266: 
                    267: Changes in 1.2.0.2 (13 July 2003)
                    268: - Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
                    269: - Attempt to avoid warnings in crc32.c for pointer-int conversion
                    270: - Add AIX to configure, remove aix directory [Bakker]
                    271: - Add some casts to minigzip.c
                    272: - Improve checking after insecure sprintf() or vsprintf() calls
                    273: - Remove #elif's from crc32.c
                    274: - Change leave label to inf_leave in inflate.c and infback.c to avoid
                    275:   library conflicts
                    276: - Remove inflate gzip decoding by default--only enable gzip decoding by
                    277:   special request for stricter backward compatibility
                    278: - Add zlibCompileFlags() function to return compilation information
                    279: - More typecasting in deflate.c to avoid warnings
                    280: - Remove leading underscore from _Capital #defines [Truta]
                    281: - Fix configure to link shared library when testing
                    282: - Add some Windows CE target adjustments [Mai]
                    283: - Remove #define ZLIB_DLL in zconf.h [Vollant]
                    284: - Add zlib.3 [Rodgers]
                    285: - Update RFC URL in deflate.c and algorithm.txt [Mai]
                    286: - Add zlib_dll_FAQ.txt to contrib [Truta]
                    287: - Add UL to some constants [Truta]
                    288: - Update minizip and vstudio [Vollant]
                    289: - Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
                    290: - Expand use of NO_DUMMY_DECL to avoid all dummy structures
                    291: - Added iostream3 to contrib [Schwardt]
                    292: - Replace rewind() with fseek() for WinCE [Truta]
                    293: - Improve setting of zlib format compression level flags
                    294:     - Report 0 for huffman and rle strategies and for level == 0 or 1
                    295:     - Report 2 only for level == 6
                    296: - Only deal with 64K limit when necessary at compile time [Truta]
                    297: - Allow TOO_FAR check to be turned off at compile time [Truta]
                    298: - Add gzclearerr() function [Souza]
                    299: - Add gzungetc() function
                    300: 
                    301: Changes in 1.2.0.1 (17 March 2003)
                    302: - Add Z_RLE strategy for run-length encoding [Truta]
                    303:     - When Z_RLE requested, restrict matches to distance one
                    304:     - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
                    305: - Correct FASTEST compilation to allow level == 0
                    306: - Clean up what gets compiled for FASTEST
                    307: - Incorporate changes to zconf.in.h [Vollant]
                    308:     - Refine detection of Turbo C need for dummy returns
                    309:     - Refine ZLIB_DLL compilation
                    310:     - Include additional header file on VMS for off_t typedef
                    311: - Try to use _vsnprintf where it supplants vsprintf [Vollant]
                    312: - Add some casts in inffast.c
                    313: - Enchance comments in zlib.h on what happens if gzprintf() tries to
                    314:   write more than 4095 bytes before compression
                    315: - Remove unused state from inflateBackEnd()
                    316: - Remove exit(0) from minigzip.c, example.c
                    317: - Get rid of all those darn tabs
                    318: - Add "check" target to Makefile.in that does the same thing as "test"
                    319: - Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
                    320: - Update contrib/inflate86 [Anderson]
                    321: - Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
                    322: - Add msdos and win32 directories with makefiles [Truta]
                    323: - More additions and improvements to the FAQ
                    324: 
                    325: Changes in 1.2.0 (9 March 2003)
                    326: - New and improved inflate code
                    327:     - About 20% faster
                    328:     - Does not allocate 32K window unless and until needed
                    329:     - Automatically detects and decompresses gzip streams
                    330:     - Raw inflate no longer needs an extra dummy byte at end
                    331:     - Added inflateBack functions using a callback interface--even faster
                    332:       than inflate, useful for file utilities (gzip, zip)
                    333:     - Added inflateCopy() function to record state for random access on
                    334:       externally generated deflate streams (e.g. in gzip files)
                    335:     - More readable code (I hope)
                    336: - New and improved crc32()
                    337:     - About 50% faster, thanks to suggestions from Rodney Brown
                    338: - Add deflateBound() and compressBound() functions
                    339: - Fix memory leak in deflateInit2()
                    340: - Permit setting dictionary for raw deflate (for parallel deflate)
                    341: - Fix const declaration for gzwrite()
                    342: - Check for some malloc() failures in gzio.c
                    343: - Fix bug in gzopen() on single-byte file 0x1f
                    344: - Fix bug in gzread() on concatenated file with 0x1f at end of buffer
                    345:   and next buffer doesn't start with 0x8b
                    346: - Fix uncompress() to return Z_DATA_ERROR on truncated input
                    347: - Free memory at end of example.c
                    348: - Remove MAX #define in trees.c (conflicted with some libraries)
                    349: - Fix static const's in deflate.c, gzio.c, and zutil.[ch]
                    350: - Declare malloc() and free() in gzio.c if STDC not defined
                    351: - Use malloc() instead of calloc() in zutil.c if int big enough
                    352: - Define STDC for AIX
                    353: - Add aix/ with approach for compiling shared library on AIX
                    354: - Add HP-UX support for shared libraries in configure
                    355: - Add OpenUNIX support for shared libraries in configure
                    356: - Use $cc instead of gcc to build shared library
                    357: - Make prefix directory if needed when installing
                    358: - Correct Macintosh avoidance of typedef Byte in zconf.h
                    359: - Correct Turbo C memory allocation when under Linux
                    360: - Use libz.a instead of -lz in Makefile (assure use of compiled library)
                    361: - Update configure to check for snprintf or vsnprintf functions and their
                    362:   return value, warn during make if using an insecure function
                    363: - Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
                    364:   is lost when library is used--resolution is to build new zconf.h
                    365: - Documentation improvements (in zlib.h):
                    366:     - Document raw deflate and inflate
                    367:     - Update RFCs URL
                    368:     - Point out that zlib and gzip formats are different
                    369:     - Note that Z_BUF_ERROR is not fatal
                    370:     - Document string limit for gzprintf() and possible buffer overflow
                    371:     - Note requirement on avail_out when flushing
                    372:     - Note permitted values of flush parameter of inflate()
                    373: - Add some FAQs (and even answers) to the FAQ
                    374: - Add contrib/inflate86/ for x86 faster inflate
                    375: - Add contrib/blast/ for PKWare Data Compression Library decompression
                    376: - Add contrib/puff/ simple inflate for deflate format description
                    377: 
                    378: Changes in 1.1.4 (11 March 2002)
                    379: - ZFREE was repeated on same allocation on some error conditions.
                    380:   This creates a security problem described in
                    381:   http://www.zlib.org/advisory-2002-03-11.txt
                    382: - Returned incorrect error (Z_MEM_ERROR) on some invalid data
                    383: - Avoid accesses before window for invalid distances with inflate window
                    384:   less than 32K.
                    385: - force windowBits > 8 to avoid a bug in the encoder for a window size
                    386:   of 256 bytes. (A complete fix will be available in 1.1.5).
                    387: 
                    388: Changes in 1.1.3 (9 July 1998)
                    389: - fix "an inflate input buffer bug that shows up on rare but persistent
                    390:   occasions" (Mark)
                    391: - fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
                    392: - fix gzseek(..., SEEK_SET) in write mode
                    393: - fix crc check after a gzeek (Frank Faubert)
                    394: - fix miniunzip when the last entry in a zip file is itself a zip file
                    395:   (J Lillge)
                    396: - add contrib/asm586 and contrib/asm686 (Brian Raiter)
                    397:   See http://www.muppetlabs.com/~breadbox/software/assembly.html
                    398: - add support for Delphi 3 in contrib/delphi (Bob Dellaca)
                    399: - add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
                    400: - do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
                    401: - use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
                    402: - added a FAQ file
                    403: 
                    404: - Support gzdopen on Mac with Metrowerks (Jason Linhart)
                    405: - Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
                    406: - define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
                    407: - avoid some warnings with Borland C (Tom Tanner)
                    408: - fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
                    409: - emulate utime() for WIN32 in contrib/untgz  (Gilles Vollant)
                    410: - allow several arguments to configure (Tim Mooney, Frodo Looijaard)
                    411: - use libdir and includedir in Makefile.in (Tim Mooney)
                    412: - support shared libraries on OSF1 V4 (Tim Mooney)
                    413: - remove so_locations in "make clean"  (Tim Mooney)
                    414: - fix maketree.c compilation error (Glenn, Mark)
                    415: - Python interface to zlib now in Python 1.5 (Jeremy Hylton)
                    416: - new Makefile.riscos (Rich Walker)
                    417: - initialize static descriptors in trees.c for embedded targets (Nick Smith)
                    418: - use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
                    419: - add the OS/2 files in Makefile.in too (Andrew Zabolotny)
                    420: - fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
                    421: - fix maketree.c to allow clean compilation of inffixed.h (Mark)
                    422: - fix parameter check in deflateCopy (Gunther Nikl)
                    423: - cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
                    424: - Many portability patches by Christian Spieler:
                    425:   . zutil.c, zutil.h: added "const" for zmem*
                    426:   . Make_vms.com: fixed some typos
                    427:   . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
                    428:   . msdos/Makefile.msc: remove "default rtl link library" info from obj files
                    429:   . msdos/Makefile.*: use model-dependent name for the built zlib library
                    430:   . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
                    431:      new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
                    432: - use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
                    433: - replace __far with _far for better portability (Christian Spieler, Tom Lane)
                    434: - fix test for errno.h in configure (Tim Newsham)
                    435: 
                    436: Changes in 1.1.2 (19 March 98)
                    437: - added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
                    438:   See http://www.winimage.com/zLibDll/unzip.html
                    439: - preinitialize the inflate tables for fixed codes, to make the code
                    440:   completely thread safe (Mark)
                    441: - some simplifications and slight speed-up to the inflate code (Mark)
                    442: - fix gzeof on non-compressed files (Allan Schrum)
                    443: - add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
                    444: - use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
                    445: - added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
                    446: - add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
                    447: - do not wrap extern "C" around system includes (Tom Lane)
                    448: - mention zlib binding for TCL in README (Andreas Kupries)
                    449: - added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
                    450: - allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
                    451: - allow "configure --prefix $HOME" (Tim Mooney)
                    452: - remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
                    453: - move Makefile.sas to amiga/Makefile.sas
                    454: 
                    455: Changes in 1.1.1 (27 Feb 98)
                    456: - fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
                    457: - remove block truncation heuristic which had very marginal effect for zlib
                    458:   (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
                    459:   compression ratio on some files. This also allows inlining _tr_tally for
                    460:   matches in deflate_slow.
                    461: - added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
                    462: 
                    463: Changes in 1.1.0 (24 Feb 98)
                    464: - do not return STREAM_END prematurely in inflate (John Bowler)
                    465: - revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
                    466: - compile with -DFASTEST to get compression code optimized for speed only
                    467: - in minigzip, try mmap'ing the input file first (Miguel Albrecht)
                    468: - increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
                    469:   on Sun but significant on HP)
                    470: 
                    471: - add a pointer to experimental unzip library in README (Gilles Vollant)
                    472: - initialize variable gcc in configure (Chris Herborth)
                    473: 
                    474: Changes in 1.0.9 (17 Feb 1998)
                    475: - added gzputs and gzgets functions
                    476: - do not clear eof flag in gzseek (Mark Diekhans)
                    477: - fix gzseek for files in transparent mode (Mark Diekhans)
                    478: - do not assume that vsprintf returns the number of bytes written (Jens Krinke)
                    479: - replace EXPORT with ZEXPORT to avoid conflict with other programs
                    480: - added compress2 in zconf.h, zlib.def, zlib.dnt
                    481: - new asm code from Gilles Vollant in contrib/asm386
                    482: - simplify the inflate code (Mark):
                    483:  . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
                    484:  . ZALLOC the length list in inflate_trees_fixed() instead of using stack
                    485:  . ZALLOC the value area for huft_build() instead of using stack
                    486:  . Simplify Z_FINISH check in inflate()
                    487: 
                    488: - Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
                    489: - in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
                    490: - in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
                    491:   the declaration of FAR (Gilles VOllant)
                    492: - install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
                    493: - read_buf buf parameter of type Bytef* instead of charf*
                    494: - zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
                    495: - do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
                    496: - fix check for presence of directories in "make install" (Ian Willis)
                    497: 
                    498: Changes in 1.0.8 (27 Jan 1998)
                    499: - fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
                    500: - fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
                    501: - added compress2() to allow setting the compression level
                    502: - include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
                    503: - use constant arrays for the static trees in trees.c instead of computing
                    504:   them at run time (thanks to Ken Raeburn for this suggestion). To create
                    505:   trees.h, compile with GEN_TREES_H and run "make test".
                    506: - check return code of example in "make test" and display result
                    507: - pass minigzip command line options to file_compress
                    508: - simplifying code of inflateSync to avoid gcc 2.8 bug
                    509: 
                    510: - support CC="gcc -Wall" in configure -s (QingLong)
                    511: - avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
                    512: - fix test for shared library support to avoid compiler warnings
                    513: - zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
                    514: - check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
                    515: - do not use fdopen for Metrowerks on Mac (Brad Pettit))
                    516: - add checks for gzputc and gzputc in example.c
                    517: - avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
                    518: - use const for the CRC table (Ken Raeburn)
                    519: - fixed "make uninstall" for shared libraries
                    520: - use Tracev instead of Trace in infblock.c
                    521: - in example.c use correct compressed length for test_sync
                    522: - suppress +vnocompatwarnings in configure for HPUX (not always supported)
                    523: 
                    524: Changes in 1.0.7 (20 Jan 1998)
                    525: - fix gzseek which was broken in write mode
                    526: - return error for gzseek to negative absolute position
                    527: - fix configure for Linux (Chun-Chung Chen)
                    528: - increase stack space for MSC (Tim Wegner)
                    529: - get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
                    530: - define EXPORTVA for gzprintf (Gilles Vollant)
                    531: - added man page zlib.3 (Rick Rodgers)
                    532: - for contrib/untgz, fix makedir() and improve Makefile
                    533: 
                    534: - check gzseek in write mode in example.c
                    535: - allocate extra buffer for seeks only if gzseek is actually called
                    536: - avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
                    537: - add inflateSyncPoint in zconf.h
                    538: - fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
                    539: 
                    540: Changes in 1.0.6 (19 Jan 1998)
                    541: - add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
                    542:   gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
                    543: - Fix a deflate bug occurring only with compression level 0 (thanks to
                    544:   Andy Buckler for finding this one).
                    545: - In minigzip, pass transparently also the first byte for .Z files.
                    546: - return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
                    547: - check Z_FINISH in inflate (thanks to Marc Schluper)
                    548: - Implement deflateCopy (thanks to Adam Costello)
                    549: - make static libraries by default in configure, add --shared option.
                    550: - move MSDOS or Windows specific files to directory msdos
                    551: - suppress the notion of partial flush to simplify the interface
                    552:   (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
                    553: - suppress history buffer provided by application to simplify the interface
                    554:   (this feature was not implemented anyway in 1.0.4)
                    555: - next_in and avail_in must be initialized before calling inflateInit or
                    556:   inflateInit2
                    557: - add EXPORT in all exported functions (for Windows DLL)
                    558: - added Makefile.nt (thanks to Stephen Williams)
                    559: - added the unsupported "contrib" directory:
                    560:    contrib/asm386/ by Gilles Vollant <info@winimage.com>
                    561:         386 asm code replacing longest_match().
                    562:    contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
                    563:         A C++ I/O streams interface to the zlib gz* functions
                    564:    contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
                    565:         Another C++ I/O streams interface
                    566:    contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
                    567:         A very simple tar.gz file extractor using zlib
                    568:    contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
                    569:         How to use compress(), uncompress() and the gz* functions from VB.
                    570: - pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
                    571:   level) in minigzip (thanks to Tom Lane)
                    572: 
                    573: - use const for rommable constants in deflate
                    574: - added test for gzseek and gztell in example.c
                    575: - add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
                    576: - add undocumented function zError to convert error code to string
                    577:   (for Tim Smithers)
                    578: - Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
                    579: - Use default memcpy for Symantec MSDOS compiler.
                    580: - Add EXPORT keyword for check_func (needed for Windows DLL)
                    581: - add current directory to LD_LIBRARY_PATH for "make test"
                    582: - create also a link for libz.so.1
                    583: - added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
                    584: - use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
                    585: - added -soname for Linux in configure (Chun-Chung Chen,
                    586: - assign numbers to the exported functions in zlib.def (for Windows DLL)
                    587: - add advice in zlib.h for best usage of deflateSetDictionary
                    588: - work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
                    589: - allow compilation with ANSI keywords only enabled for TurboC in large model
                    590: - avoid "versionString"[0] (Borland bug)
                    591: - add NEED_DUMMY_RETURN for Borland
                    592: - use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
                    593: - allow compilation with CC
                    594: - defined STDC for OS/2 (David Charlap)
                    595: - limit external names to 8 chars for MVS (Thomas Lund)
                    596: - in minigzip.c, use static buffers only for 16-bit systems
                    597: - fix suffix check for "minigzip -d foo.gz"
                    598: - do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
                    599: - use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
                    600: - added makelcc.bat for lcc-win32 (Tom St Denis)
                    601: - in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
                    602: - Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
                    603: - check for unistd.h in configure (for off_t)
                    604: - remove useless check parameter in inflate_blocks_free
                    605: - avoid useless assignment of s->check to itself in inflate_blocks_new
                    606: - do not flush twice in gzclose (thanks to Ken Raeburn)
                    607: - rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
                    608: - use NO_ERRNO_H instead of enumeration of operating systems with errno.h
                    609: - work around buggy fclose on pipes for HP/UX
                    610: - support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
                    611: - fix configure if CC is already equal to gcc
                    612: 
                    613: Changes in 1.0.5 (3 Jan 98)
                    614: - Fix inflate to terminate gracefully when fed corrupted or invalid data
                    615: - Use const for rommable constants in inflate
                    616: - Eliminate memory leaks on error conditions in inflate
                    617: - Removed some vestigial code in inflate
                    618: - Update web address in README
                    619: 
                    620: Changes in 1.0.4 (24 Jul 96)
                    621: - In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
                    622:   bit, so the decompressor could decompress all the correct data but went
                    623:   on to attempt decompressing extra garbage data. This affected minigzip too.
                    624: - zlibVersion and gzerror return const char* (needed for DLL)
                    625: - port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
                    626: - use z_error only for DEBUG (avoid problem with DLLs)
                    627: 
                    628: Changes in 1.0.3 (2 Jul 96)
                    629: - use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
                    630:   small and medium models; this makes the library incompatible with previous
                    631:   versions for these models. (No effect in large model or on other systems.)
                    632: - return OK instead of BUF_ERROR if previous deflate call returned with
                    633:   avail_out as zero but there is nothing to do
                    634: - added memcmp for non STDC compilers
                    635: - define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
                    636: - define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
                    637: - better check for 16-bit mode MSC (avoids problem with Symantec)
                    638: 
                    639: Changes in 1.0.2 (23 May 96)
                    640: - added Windows DLL support
                    641: - added a function zlibVersion (for the DLL support)
                    642: - fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
                    643: - Bytef is define's instead of typedef'd only for Borland C
                    644: - avoid reading uninitialized memory in example.c
                    645: - mention in README that the zlib format is now RFC1950
                    646: - updated Makefile.dj2
                    647: - added algorithm.doc
                    648: 
                    649: Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
                    650: - fix array overlay in deflate.c which sometimes caused bad compressed data
                    651: - fix inflate bug with empty stored block
                    652: - fix MSDOS medium model which was broken in 0.99
                    653: - fix deflateParams() which could generated bad compressed data.
                    654: - Bytef is define'd instead of typedef'ed (work around Borland bug)
                    655: - added an INDEX file
                    656: - new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
                    657:   Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
                    658: - speed up adler32 for modern machines without auto-increment
                    659: - added -ansi for IRIX in configure
                    660: - static_init_done in trees.c is an int
                    661: - define unlink as delete for VMS
                    662: - fix configure for QNX
                    663: - add configure branch for SCO and HPUX
                    664: - avoid many warnings (unused variables, dead assignments, etc...)
                    665: - no fdopen for BeOS
                    666: - fix the Watcom fix for 32 bit mode (define FAR as empty)
                    667: - removed redefinition of Byte for MKWERKS
                    668: - work around an MWKERKS bug (incorrect merge of all .h files)
                    669: 
                    670: Changes in 0.99 (27 Jan 96)
                    671: - allow preset dictionary shared between compressor and decompressor
                    672: - allow compression level 0 (no compression)
                    673: - add deflateParams in zlib.h: allow dynamic change of compression level
                    674:   and compression strategy.
                    675: - test large buffers and deflateParams in example.c
                    676: - add optional "configure" to build zlib as a shared library
                    677: - suppress Makefile.qnx, use configure instead
                    678: - fixed deflate for 64-bit systems (detected on Cray)
                    679: - fixed inflate_blocks for 64-bit systems (detected on Alpha)
                    680: - declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
                    681: - always return Z_BUF_ERROR when deflate() has nothing to do
                    682: - deflateInit and inflateInit are now macros to allow version checking
                    683: - prefix all global functions and types with z_ with -DZ_PREFIX
                    684: - make falloc completely reentrant (inftrees.c)
                    685: - fixed very unlikely race condition in ct_static_init
                    686: - free in reverse order of allocation to help memory manager
                    687: - use zlib-1.0/* instead of zlib/* inside the tar.gz
                    688: - make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
                    689:   -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
                    690: - allow gzread on concatenated .gz files
                    691: - deflateEnd now returns Z_DATA_ERROR if it was premature
                    692: - deflate is finally (?) fully deterministic (no matches beyond end of input)
                    693: - Document Z_SYNC_FLUSH
                    694: - add uninstall in Makefile
                    695: - Check for __cpluplus in zlib.h
                    696: - Better test in ct_align for partial flush
                    697: - avoid harmless warnings for Borland C++
                    698: - initialize hash_head in deflate.c
                    699: - avoid warning on fdopen (gzio.c) for HP cc -Aa
                    700: - include stdlib.h for STDC compilers
                    701: - include errno.h for Cray
                    702: - ignore error if ranlib doesn't exist
                    703: - call ranlib twice for NeXTSTEP
                    704: - use exec_prefix instead of prefix for libz.a
                    705: - renamed ct_* as _tr_* to avoid conflict with applications
                    706: - clear z->msg in inflateInit2 before any error return
                    707: - initialize opaque in example.c, gzio.c, deflate.c and inflate.c
                    708: - fixed typo in zconf.h (_GNUC__ => __GNUC__)
                    709: - check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
                    710: - fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
                    711: - in fcalloc, normalize pointer if size > 65520 bytes
                    712: - don't use special fcalloc for 32 bit Borland C++
                    713: - use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
                    714: - use Z_BINARY instead of BINARY
                    715: - document that gzclose after gzdopen will close the file
                    716: - allow "a" as mode in gzopen.
                    717: - fix error checking in gzread
                    718: - allow skipping .gz extra-field on pipes
                    719: - added reference to Perl interface in README
                    720: - put the crc table in FAR data (I dislike more and more the medium model :)
                    721: - added get_crc_table
                    722: - added a dimension to all arrays (Borland C can't count).
                    723: - workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
                    724: - guard against multiple inclusion of *.h (for precompiled header on Mac)
                    725: - Watcom C pretends to be Microsoft C small model even in 32 bit mode.
                    726: - don't use unsized arrays to avoid silly warnings by Visual C++:
                    727:      warning C4746: 'inflate_mask' : unsized array treated as  '__far'
                    728:      (what's wrong with far data in far model?).
                    729: - define enum out of inflate_blocks_state to allow compilation with C++
                    730: 
                    731: Changes in 0.95 (16 Aug 95)
                    732: - fix MSDOS small and medium model (now easier to adapt to any compiler)
                    733: - inlined send_bits
                    734: - fix the final (:-) bug for deflate with flush (output was correct but
                    735:   not completely flushed in rare occasions).
                    736: - default window size is same for compression and decompression
                    737:   (it's now sufficient to set MAX_WBITS in zconf.h).
                    738: - voidp -> voidpf and voidnp -> voidp (for consistency with other
                    739:   typedefs and because voidnp was not near in large model).
                    740: 
                    741: Changes in 0.94 (13 Aug 95)
                    742: - support MSDOS medium model
                    743: - fix deflate with flush (could sometimes generate bad output)
                    744: - fix deflateReset (zlib header was incorrectly suppressed)
                    745: - added support for VMS
                    746: - allow a compression level in gzopen()
                    747: - gzflush now calls fflush
                    748: - For deflate with flush, flush even if no more input is provided.
                    749: - rename libgz.a as libz.a
                    750: - avoid complex expression in infcodes.c triggering Turbo C bug
                    751: - work around a problem with gcc on Alpha (in INSERT_STRING)
                    752: - don't use inline functions (problem with some gcc versions)
                    753: - allow renaming of Byte, uInt, etc... with #define.
                    754: - avoid warning about (unused) pointer before start of array in deflate.c
                    755: - avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
                    756: - avoid reserved word 'new' in trees.c
                    757: 
                    758: Changes in 0.93 (25 June 95)
                    759: - temporarily disable inline functions
                    760: - make deflate deterministic
                    761: - give enough lookahead for PARTIAL_FLUSH
                    762: - Set binary mode for stdin/stdout in minigzip.c for OS/2
                    763: - don't even use signed char in inflate (not portable enough)
                    764: - fix inflate memory leak for segmented architectures
                    765: 
                    766: Changes in 0.92 (3 May 95)
                    767: - don't assume that char is signed (problem on SGI)
                    768: - Clear bit buffer when starting a stored block
                    769: - no memcpy on Pyramid
                    770: - suppressed inftest.c
                    771: - optimized fill_window, put longest_match inline for gcc
                    772: - optimized inflate on stored blocks.
                    773: - untabify all sources to simplify patches
                    774: 
                    775: Changes in 0.91 (2 May 95)
                    776: - Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
                    777: - Document the memory requirements in zconf.h
                    778: - added "make install"
                    779: - fix sync search logic in inflateSync
                    780: - deflate(Z_FULL_FLUSH) now works even if output buffer too short
                    781: - after inflateSync, don't scare people with just "lo world"
                    782: - added support for DJGPP
                    783: 
                    784: Changes in 0.9 (1 May 95)
                    785: - don't assume that zalloc clears the allocated memory (the TurboC bug
                    786:   was Mark's bug after all :)
                    787: - let again gzread copy uncompressed data unchanged (was working in 0.71)
                    788: - deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
                    789: - added a test of inflateSync in example.c
                    790: - moved MAX_WBITS to zconf.h because users might want to change that.
                    791: - document explicitly that zalloc(64K) on MSDOS must return a normalized
                    792:   pointer (zero offset)
                    793: - added Makefiles for Microsoft C, Turbo C, Borland C++
                    794: - faster crc32()
                    795: 
                    796: Changes in 0.8 (29 April 95)
                    797: - added fast inflate (inffast.c)
                    798: - deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
                    799:   is incompatible with previous versions of zlib which returned Z_OK.
                    800: - work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
                    801:   (actually that was not a compiler bug, see 0.81 above)
                    802: - gzread no longer reads one extra byte in certain cases
                    803: - In gzio destroy(), don't reference a freed structure
                    804: - avoid many warnings for MSDOS
                    805: - avoid the ERROR symbol which is used by MS Windows
                    806: 
                    807: Changes in 0.71 (14 April 95)
                    808: - Fixed more MSDOS compilation problems :( There is still a bug with
                    809:   TurboC large model.
                    810: 
                    811: Changes in 0.7 (14 April 95)
                    812: - Added full inflate support.
                    813: - Simplified the crc32() interface. The pre- and post-conditioning
                    814:   (one's complement) is now done inside crc32(). WARNING: this is
                    815:   incompatible with previous versions; see zlib.h for the new usage.
                    816: 
                    817: Changes in 0.61 (12 April 95)
                    818: - workaround for a bug in TurboC. example and minigzip now work on MSDOS.
                    819: 
                    820: Changes in 0.6 (11 April 95)
                    821: - added minigzip.c
                    822: - added gzdopen to reopen a file descriptor as gzFile
                    823: - added transparent reading of non-gziped files in gzread.
                    824: - fixed bug in gzread (don't read crc as data)
                    825: - fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
                    826: - don't allocate big arrays in the stack (for MSDOS)
                    827: - fix some MSDOS compilation problems
                    828: 
                    829: Changes in 0.5:
                    830: - do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
                    831:   not yet Z_FULL_FLUSH.
                    832: - support decompression but only in a single step (forced Z_FINISH)
                    833: - added opaque object for zalloc and zfree.
                    834: - added deflateReset and inflateReset
                    835: - added a variable zlib_version for consistency checking.
                    836: - renamed the 'filter' parameter of deflateInit2 as 'strategy'.
                    837:   Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
                    838: 
                    839: Changes in 0.4:
                    840: - avoid "zip" everywhere, use zlib instead of ziplib.
                    841: - suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
                    842:   if compression method == 8.
                    843: - added adler32 and crc32
                    844: - renamed deflateOptions as deflateInit2, call one or the other but not both
                    845: - added the method parameter for deflateInit2.
                    846: - added inflateInit2
                    847: - simplied considerably deflateInit and inflateInit by not supporting
                    848:   user-provided history buffer. This is supported only in deflateInit2
                    849:   and inflateInit2.
                    850: 
                    851: Changes in 0.3:
                    852: - prefix all macro names with Z_
                    853: - use Z_FINISH instead of deflateEnd to finish compression.
                    854: - added Z_HUFFMAN_ONLY
                    855: - added gzerror()

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