CHANGELO
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- ChangeLog file for zlib
- 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()