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2 ChangeLog file for zlib
3  
4 Changes in 1.2.8 (28 Apr 2013)
5 - Update contrib/minizip/iowin32.c for Windows RT [Vollant]
6 - Do not force Z_CONST for C++
7 - Clean up contrib/vstudio [Ro§]
8 - Correct spelling error in zlib.h
9 - Fix mixed line endings in contrib/vstudio
10  
11 Changes in 1.2.7.3 (13 Apr 2013)
12 - Fix version numbers and DLL names in contrib/vstudio/*/zlib.rc
13  
14 Changes in 1.2.7.2 (13 Apr 2013)
15 - Change check for a four-byte type back to hexadecimal
16 - Fix typo in win32/Makefile.msc
17 - Add casts in gzwrite.c for pointer differences
18  
19 Changes in 1.2.7.1 (24 Mar 2013)
20 - Replace use of unsafe string functions with snprintf if available
21 - Avoid including stddef.h on Windows for Z_SOLO compile [Niessink]
22 - Fix gzgetc undefine when Z_PREFIX set [Turk]
23 - Eliminate use of mktemp in Makefile (not always available)
24 - Fix bug in 'F' mode for gzopen()
25 - Add inflateGetDictionary() function
26 - Correct comment in deflate.h
27 - Use _snprintf for snprintf in Microsoft C
28 - On Darwin, only use /usr/bin/libtool if libtool is not Apple
29 - Delete "--version" file if created by "ar --version" [Richard G.]
30 - Fix configure check for veracity of compiler error return codes
31 - Fix CMake compilation of static lib for MSVC2010 x64
32 - Remove unused variable in infback9.c
33 - Fix argument checks in gzlog_compress() and gzlog_write()
34 - Clean up the usage of z_const and respect const usage within zlib
35 - Clean up examples/gzlog.[ch] comparisons of different types
36 - Avoid shift equal to bits in type (caused endless loop)
37 - Fix unintialized value bug in gzputc() introduced by const patches
38 - Fix memory allocation error in examples/zran.c [Nor]
39 - Fix bug where gzopen(), gzclose() would write an empty file
40 - Fix bug in gzclose() when gzwrite() runs out of memory
41 - Check for input buffer malloc failure in examples/gzappend.c
42 - Add note to contrib/blast to use binary mode in stdio
43 - Fix comparisons of differently signed integers in contrib/blast
44 - Check for invalid code length codes in contrib/puff
45 - Fix serious but very rare decompression bug in inftrees.c
46 - Update inflateBack() comments, since inflate() can be faster
47 - Use underscored I/O function names for WINAPI_FAMILY
48 - Add _tr_flush_bits to the external symbols prefixed by --zprefix
49 - Add contrib/vstudio/vc10 pre-build step for static only
50 - Quote --version-script argument in CMakeLists.txt
51 - Don't specify --version-script on Apple platforms in CMakeLists.txt
52 - Fix casting error in contrib/testzlib/testzlib.c
53 - Fix types in contrib/minizip to match result of get_crc_table()
54 - Simplify contrib/vstudio/vc10 with 'd' suffix
55 - Add TOP support to win32/Makefile.msc
56 - Suport i686 and amd64 assembler builds in CMakeLists.txt
57 - Fix typos in the use of _LARGEFILE64_SOURCE in zconf.h
58 - Add vc11 and vc12 build files to contrib/vstudio
59 - Add gzvprintf() as an undocumented function in zlib
60 - Fix configure for Sun shell
61 - Remove runtime check in configure for four-byte integer type
62 - Add casts and consts to ease user conversion to C++
63 - Add man pages for minizip and miniunzip
64 - In Makefile uninstall, don't rm if preceding cd fails
65 - Do not return Z_BUF_ERROR if deflateParam() has nothing to write
66  
67 Changes in 1.2.7 (2 May 2012)
68 - Replace use of memmove() with a simple copy for portability
69 - Test for existence of strerror
70 - Restore gzgetc_ for backward compatibility with 1.2.6
71 - Fix build with non-GNU make on Solaris
72 - Require gcc 4.0 or later on Mac OS X to use the hidden attribute
73 - Include unistd.h for Watcom C
74 - Use __WATCOMC__ instead of __WATCOM__
75 - Do not use the visibility attribute if NO_VIZ defined
76 - Improve the detection of no hidden visibility attribute
77 - Avoid using __int64 for gcc or solo compilation
78 - Cast to char * in gzprintf to avoid warnings [Zinser]
79 - Fix make_vms.com for VAX [Zinser]
80 - Don't use library or built-in byte swaps
81 - Simplify test and use of gcc hidden attribute
82 - Fix bug in gzclose_w() when gzwrite() fails to allocate memory
83 - Add "x" (O_EXCL) and "e" (O_CLOEXEC) modes support to gzopen()
84 - Fix bug in test/minigzip.c for configure --solo
85 - Fix contrib/vstudio project link errors [Mohanathas]
86 - Add ability to choose the builder in make_vms.com [Schweda]
87 - Add DESTDIR support to mingw32 win32/Makefile.gcc
88 - Fix comments in win32/Makefile.gcc for proper usage
89 - Allow overriding the default install locations for cmake
90 - Generate and install the pkg-config file with cmake
91 - Build both a static and a shared version of zlib with cmake
92 - Include version symbols for cmake builds
93 - If using cmake with MSVC, add the source directory to the includes
94 - Remove unneeded EXTRA_CFLAGS from win32/Makefile.gcc [Truta]
95 - Move obsolete emx makefile to old [Truta]
96 - Allow the use of -Wundef when compiling or using zlib
97 - Avoid the use of the -u option with mktemp
98 - Improve inflate() documentation on the use of Z_FINISH
99 - Recognize clang as gcc
100 - Add gzopen_w() in Windows for wide character path names
101 - Rename zconf.h in CMakeLists.txt to move it out of the way
102 - Add source directory in CMakeLists.txt for building examples
103 - Look in build directory for zlib.pc in CMakeLists.txt
104 - Remove gzflags from zlibvc.def in vc9 and vc10
105 - Fix contrib/minizip compilation in the MinGW environment
106 - Update ./configure for Solaris, support --64 [Mooney]
107 - Remove -R. from Solaris shared build (possible security issue)
108 - Avoid race condition for parallel make (-j) running example
109 - Fix type mismatch between get_crc_table() and crc_table
110 - Fix parsing of version with "-" in CMakeLists.txt [Snider, Ziegler]
111 - Fix the path to zlib.map in CMakeLists.txt
112 - Force the native libtool in Mac OS X to avoid GNU libtool [Beebe]
113 - Add instructions to win32/Makefile.gcc for shared install [Torri]
114  
115 Changes in 1.2.6.1 (12 Feb 2012)
116 - Avoid the use of the Objective-C reserved name "id"
117 - Include io.h in gzguts.h for Microsoft compilers
118 - Fix problem with ./configure --prefix and gzgetc macro
119 - Include gz_header definition when compiling zlib solo
120 - Put gzflags() functionality back in zutil.c
121 - Avoid library header include in crc32.c for Z_SOLO
122 - Use name in GCC_CLASSIC as C compiler for coverage testing, if set
123 - Minor cleanup in contrib/minizip/zip.c [Vollant]
124 - Update make_vms.com [Zinser]
125 - Remove unnecessary gzgetc_ function
126 - Use optimized byte swap operations for Microsoft and GNU [Snyder]
127 - Fix minor typo in zlib.h comments [Rzesniowiecki]
128  
129 Changes in 1.2.6 (29 Jan 2012)
130 - Update the Pascal interface in contrib/pascal
131 - Fix function numbers for gzgetc_ in zlibvc.def files
132 - Fix configure.ac for contrib/minizip [Schiffer]
133 - Fix large-entry detection in minizip on 64-bit systems [Schiffer]
134 - Have ./configure use the compiler return code for error indication
135 - Fix CMakeLists.txt for cross compilation [McClure]
136 - Fix contrib/minizip/zip.c for 64-bit architectures [Dalsnes]
137 - Fix compilation of contrib/minizip on FreeBSD [Marquez]
138 - Correct suggested usages in win32/Makefile.msc [Shachar, Horvath]
139 - Include io.h for Turbo C / Borland C on all platforms [Truta]
140 - Make version explicit in contrib/minizip/configure.ac [Bosmans]
141 - Avoid warning for no encryption in contrib/minizip/zip.c [Vollant]
142 - Minor cleanup up contrib/minizip/unzip.c [Vollant]
143 - Fix bug when compiling minizip with C++ [Vollant]
144 - Protect for long name and extra fields in contrib/minizip [Vollant]
145 - Avoid some warnings in contrib/minizip [Vollant]
146 - Add -I../.. -L../.. to CFLAGS for minizip and miniunzip
147 - Add missing libs to minizip linker command
148 - Add support for VPATH builds in contrib/minizip
149 - Add an --enable-demos option to contrib/minizip/configure
150 - Add the generation of configure.log by ./configure
151 - Exit when required parameters not provided to win32/Makefile.gcc
152 - Have gzputc return the character written instead of the argument
153 - Use the -m option on ldconfig for BSD systems [Tobias]
154 - Correct in zlib.map when deflateResetKeep was added
155  
156 Changes in 1.2.5.3 (15 Jan 2012)
157 - Restore gzgetc function for binary compatibility
158 - Do not use _lseeki64 under Borland C++ [Truta]
159 - Update win32/Makefile.msc to build test/*.c [Truta]
160 - Remove old/visualc6 given CMakefile and other alternatives
161 - Update AS400 build files and documentation [Monnerat]
162 - Update win32/Makefile.gcc to build test/*.c [Truta]
163 - Permit stronger flushes after Z_BLOCK flushes
164 - Avoid extraneous empty blocks when doing empty flushes
165 - Permit Z_NULL arguments to deflatePending
166 - Allow deflatePrime() to insert bits in the middle of a stream
167 - Remove second empty static block for Z_PARTIAL_FLUSH
168 - Write out all of the available bits when using Z_BLOCK
169 - Insert the first two strings in the hash table after a flush
170  
171 Changes in 1.2.5.2 (17 Dec 2011)
172 - fix ld error: unable to find version dependency 'ZLIB_1.2.5'
173 - use relative symlinks for shared libs
174 - Avoid searching past window for Z_RLE strategy
175 - Assure that high-water mark initialization is always applied in deflate
176 - Add assertions to fill_window() in deflate.c to match comments
177 - Update python link in README
178 - Correct spelling error in gzread.c
179 - Fix bug in gzgets() for a concatenated empty gzip stream
180 - Correct error in comment for gz_make()
181 - Change gzread() and related to ignore junk after gzip streams
182 - Allow gzread() and related to continue after gzclearerr()
183 - Allow gzrewind() and gzseek() after a premature end-of-file
184 - Simplify gzseek() now that raw after gzip is ignored
185 - Change gzgetc() to a macro for speed (~40% speedup in testing)
186 - Fix gzclose() to return the actual error last encountered
187 - Always add large file support for windows
188 - Include zconf.h for windows large file support
189 - Include zconf.h.cmakein for windows large file support
190 - Update zconf.h.cmakein on make distclean
191 - Merge vestigial vsnprintf determination from zutil.h to gzguts.h
192 - Clarify how gzopen() appends in zlib.h comments
193 - Correct documentation of gzdirect() since junk at end now ignored
194 - Add a transparent write mode to gzopen() when 'T' is in the mode
195 - Update python link in zlib man page
196 - Get inffixed.h and MAKEFIXED result to match
197 - Add a ./config --solo option to make zlib subset with no libary use
198 - Add undocumented inflateResetKeep() function for CAB file decoding
199 - Add --cover option to ./configure for gcc coverage testing
200 - Add #define ZLIB_CONST option to use const in the z_stream interface
201 - Add comment to gzdopen() in zlib.h to use dup() when using fileno()
202 - Note behavior of uncompress() to provide as much data as it can
203 - Add files in contrib/minizip to aid in building libminizip
204 - Split off AR options in Makefile.in and configure
205 - Change ON macro to Z_ARG to avoid application conflicts
206 - Facilitate compilation with Borland C++ for pragmas and vsnprintf
207 - Include io.h for Turbo C / Borland C++
208 - Move example.c and minigzip.c to test/
209 - Simplify incomplete code table filling in inflate_table()
210 - Remove code from inflate.c and infback.c that is impossible to execute
211 - Test the inflate code with full coverage
212 - Allow deflateSetDictionary, inflateSetDictionary at any time (in raw)
213 - Add deflateResetKeep and fix inflateResetKeep to retain dictionary
214 - Fix gzwrite.c to accommodate reduced memory zlib compilation
215 - Have inflate() with Z_FINISH avoid the allocation of a window
216 - Do not set strm->adler when doing raw inflate
217 - Fix gzeof() to behave just like feof() when read is not past end of file
218 - Fix bug in gzread.c when end-of-file is reached
219 - Avoid use of Z_BUF_ERROR in gz* functions except for premature EOF
220 - Document gzread() capability to read concurrently written files
221 - Remove hard-coding of resource compiler in CMakeLists.txt [Blammo]
222  
223 Changes in 1.2.5.1 (10 Sep 2011)
224 - Update FAQ entry on shared builds (#13)
225 - Avoid symbolic argument to chmod in Makefile.in
226 - Fix bug and add consts in contrib/puff [Oberhumer]
227 - Update contrib/puff/zeros.raw test file to have all block types
228 - Add full coverage test for puff in contrib/puff/Makefile
229 - Fix static-only-build install in Makefile.in
230 - Fix bug in unzGetCurrentFileInfo() in contrib/minizip [Kuno]
231 - Add libz.a dependency to shared in Makefile.in for parallel builds
232 - Spell out "number" (instead of "nb") in zlib.h for total_in, total_out
233 - Replace $(...) with `...` in configure for non-bash sh [Bowler]
234 - Add darwin* to Darwin* and solaris* to SunOS\ 5* in configure [Groffen]
235 - Add solaris* to Linux* in configure to allow gcc use [Groffen]
236 - Add *bsd* to Linux* case in configure [Bar-Lev]
237 - Add inffast.obj to dependencies in win32/Makefile.msc
238 - Correct spelling error in deflate.h [Kohler]
239 - Change libzdll.a again to libz.dll.a (!) in win32/Makefile.gcc
240 - Add test to configure for GNU C looking for gcc in output of $cc -v
241 - Add zlib.pc generation to win32/Makefile.gcc [Weigelt]
242 - Fix bug in zlib.h for _FILE_OFFSET_BITS set and _LARGEFILE64_SOURCE not
243 - Add comment in zlib.h that adler32_combine with len2 < 0 makes no sense
244 - Make NO_DIVIDE option in adler32.c much faster (thanks to John Reiser)
245 - Make stronger test in zconf.h to include unistd.h for LFS
246 - Apply Darwin patches for 64-bit file offsets to contrib/minizip [Slack]
247 - Fix zlib.h LFS support when Z_PREFIX used
248 - Add updated as400 support (removed from old) [Monnerat]
249 - Avoid deflate sensitivity to volatile input data
250 - Avoid division in adler32_combine for NO_DIVIDE
251 - Clarify the use of Z_FINISH with deflateBound() amount of space
252 - Set binary for output file in puff.c
253 - Use u4 type for crc_table to avoid conversion warnings
254 - Apply casts in zlib.h to avoid conversion warnings
255 - Add OF to prototypes for adler32_combine_ and crc32_combine_ [Miller]
256 - Improve inflateSync() documentation to note indeterminancy
257 - Add deflatePending() function to return the amount of pending output
258 - Correct the spelling of "specification" in FAQ [Randers-Pehrson]
259 - Add a check in configure for stdarg.h, use for gzprintf()
260 - Check that pointers fit in ints when gzprint() compiled old style
261 - Add dummy name before $(SHAREDLIBV) in Makefile [Bar-Lev, Bowler]
262 - Delete line in configure that adds -L. libz.a to LDFLAGS [Weigelt]
263 - Add debug records in assmebler code [Londer]
264 - Update RFC references to use http://tools.ietf.org/html/... [Li]
265 - Add --archs option, use of libtool to configure for Mac OS X [Borstel]
266  
267 Changes in 1.2.5 (19 Apr 2010)
268 - Disable visibility attribute in win32/Makefile.gcc [Bar-Lev]
269 - Default to libdir as sharedlibdir in configure [Nieder]
270 - Update copyright dates on modified source files
271 - Update trees.c to be able to generate modified trees.h
272 - Exit configure for MinGW, suggesting win32/Makefile.gcc
273 - Check for NULL path in gz_open [Homurlu]
274  
275 Changes in 1.2.4.5 (18 Apr 2010)
276 - Set sharedlibdir in configure [Torok]
277 - Set LDFLAGS in Makefile.in [Bar-Lev]
278 - Avoid mkdir objs race condition in Makefile.in [Bowler]
279 - Add ZLIB_INTERNAL in front of internal inter-module functions and arrays
280 - Define ZLIB_INTERNAL to hide internal functions and arrays for GNU C
281 - Don't use hidden attribute when it is a warning generator (e.g. Solaris)
282  
283 Changes in 1.2.4.4 (18 Apr 2010)
284 - Fix CROSS_PREFIX executable testing, CHOST extract, mingw* [Torok]
285 - Undefine _LARGEFILE64_SOURCE in zconf.h if it is zero, but not if empty
286 - Try to use bash or ksh regardless of functionality of /bin/sh
287 - Fix configure incompatibility with NetBSD sh
288 - Remove attempt to run under bash or ksh since have better NetBSD fix
289 - Fix win32/Makefile.gcc for MinGW [Bar-Lev]
290 - Add diagnostic messages when using CROSS_PREFIX in configure
291 - Added --sharedlibdir option to configure [Weigelt]
292 - Use hidden visibility attribute when available [Frysinger]
293  
294 Changes in 1.2.4.3 (10 Apr 2010)
295 - Only use CROSS_PREFIX in configure for ar and ranlib if they exist
296 - Use CROSS_PREFIX for nm [Bar-Lev]
297 - Assume _LARGEFILE64_SOURCE defined is equivalent to true
298 - Avoid use of undefined symbols in #if with && and ||
299 - Make *64 prototypes in gzguts.h consistent with functions
300 - Add -shared load option for MinGW in configure [Bowler]
301 - Move z_off64_t to public interface, use instead of off64_t
302 - Remove ! from shell test in configure (not portable to Solaris)
303 - Change +0 macro tests to -0 for possibly increased portability
304  
305 Changes in 1.2.4.2 (9 Apr 2010)
306 - Add consistent carriage returns to readme.txt's in masmx86 and masmx64
307 - Really provide prototypes for *64 functions when building without LFS
308 - Only define unlink() in minigzip.c if unistd.h not included
309 - Update README to point to contrib/vstudio project files
310 - Move projects/vc6 to old/ and remove projects/
311 - Include stdlib.h in minigzip.c for setmode() definition under WinCE
312 - Clean up assembler builds in win32/Makefile.msc [Rowe]
313 - Include sys/types.h for Microsoft for off_t definition
314 - Fix memory leak on error in gz_open()
315 - Symbolize nm as $NM in configure [Weigelt]
316 - Use TEST_LDSHARED instead of LDSHARED to link test programs [Weigelt]
317 - Add +0 to _FILE_OFFSET_BITS and _LFS64_LARGEFILE in case not defined
318 - Fix bug in gzeof() to take into account unused input data
319 - Avoid initialization of structures with variables in puff.c
320 - Updated win32/README-WIN32.txt [Rowe]
321  
322 Changes in 1.2.4.1 (28 Mar 2010)
323 - Remove the use of [a-z] constructs for sed in configure [gentoo 310225]
324 - Remove $(SHAREDLIB) from LIBS in Makefile.in [Creech]
325 - Restore "for debugging" comment on sprintf() in gzlib.c
326 - Remove fdopen for MVS from gzguts.h
327 - Put new README-WIN32.txt in win32 [Rowe]
328 - Add check for shell to configure and invoke another shell if needed
329 - Fix big fat stinking bug in gzseek() on uncompressed files
330 - Remove vestigial F_OPEN64 define in zutil.h
331 - Set and check the value of _LARGEFILE_SOURCE and _LARGEFILE64_SOURCE
332 - Avoid errors on non-LFS systems when applications define LFS macros
333 - Set EXE to ".exe" in configure for MINGW [Kahle]
334 - Match crc32() in crc32.c exactly to the prototype in zlib.h [Sherrill]
335 - Add prefix for cross-compilation in win32/makefile.gcc [Bar-Lev]
336 - Add DLL install in win32/makefile.gcc [Bar-Lev]
337 - Allow Linux* or linux* from uname in configure [Bar-Lev]
338 - Allow ldconfig to be redefined in configure and Makefile.in [Bar-Lev]
339 - Add cross-compilation prefixes to configure [Bar-Lev]
340 - Match type exactly in gz_load() invocation in gzread.c
341 - Match type exactly of zcalloc() in zutil.c to zlib.h alloc_func
342 - Provide prototypes for *64 functions when building zlib without LFS
343 - Don't use -lc when linking shared library on MinGW
344 - Remove errno.h check in configure and vestigial errno code in zutil.h
345  
346 Changes in 1.2.4 (14 Mar 2010)
347 - Fix VER3 extraction in configure for no fourth subversion
348 - Update zlib.3, add docs to Makefile.in to make .pdf out of it
349 - Add zlib.3.pdf to distribution
350 - Don't set error code in gzerror() if passed pointer is NULL
351 - Apply destination directory fixes to CMakeLists.txt [Lowman]
352 - Move #cmakedefine's to a new zconf.in.cmakein
353 - Restore zconf.h for builds that don't use configure or cmake
354 - Add distclean to dummy Makefile for convenience
355 - Update and improve INDEX, README, and FAQ
356 - Update CMakeLists.txt for the return of zconf.h [Lowman]
357 - Update contrib/vstudio/vc9 and vc10 [Vollant]
358 - Change libz.dll.a back to libzdll.a in win32/Makefile.gcc
359 - Apply license and readme changes to contrib/asm686 [Raiter]
360 - Check file name lengths and add -c option in minigzip.c [Li]
361 - Update contrib/amd64 and contrib/masmx86/ [Vollant]
362 - Avoid use of "eof" parameter in trees.c to not shadow library variable
363 - Update make_vms.com for removal of zlibdefs.h [Zinser]
364 - Update assembler code and vstudio projects in contrib [Vollant]
365 - Remove outdated assembler code contrib/masm686 and contrib/asm586
366 - Remove old vc7 and vc8 from contrib/vstudio
367 - Update win32/Makefile.msc, add ZLIB_VER_SUBREVISION [Rowe]
368 - Fix memory leaks in gzclose_r() and gzclose_w(), file leak in gz_open()
369 - Add contrib/gcc_gvmat64 for longest_match and inflate_fast [Vollant]
370 - Remove *64 functions from win32/zlib.def (they're not 64-bit yet)
371 - Fix bug in void-returning vsprintf() case in gzwrite.c
372 - Fix name change from inflate.h in contrib/inflate86/inffas86.c
373 - Check if temporary file exists before removing in make_vms.com [Zinser]
374 - Fix make install and uninstall for --static option
375 - Fix usage of _MSC_VER in gzguts.h and zutil.h [Truta]
376 - Update readme.txt in contrib/masmx64 and masmx86 to assemble
377  
378 Changes in 1.2.3.9 (21 Feb 2010)
379 - Expunge gzio.c
380 - Move as400 build information to old
381 - Fix updates in contrib/minizip and contrib/vstudio
382 - Add const to vsnprintf test in configure to avoid warnings [Weigelt]
383 - Delete zconf.h (made by configure) [Weigelt]
384 - Change zconf.in.h to zconf.h.in per convention [Weigelt]
385 - Check for NULL buf in gzgets()
386 - Return empty string for gzgets() with len == 1 (like fgets())
387 - Fix description of gzgets() in zlib.h for end-of-file, NULL return
388 - Update minizip to 1.1 [Vollant]
389 - Avoid MSVC loss of data warnings in gzread.c, gzwrite.c
390 - Note in zlib.h that gzerror() should be used to distinguish from EOF
391 - Remove use of snprintf() from gzlib.c
392 - Fix bug in gzseek()
393 - Update contrib/vstudio, adding vc9 and vc10 [Kuno, Vollant]
394 - Fix zconf.h generation in CMakeLists.txt [Lowman]
395 - Improve comments in zconf.h where modified by configure
396  
397 Changes in 1.2.3.8 (13 Feb 2010)
398 - Clean up text files (tabs, trailing whitespace, etc.) [Oberhumer]
399 - Use z_off64_t in gz_zero() and gz_skip() to match state->skip
400 - Avoid comparison problem when sizeof(int) == sizeof(z_off64_t)
401 - Revert to Makefile.in from 1.2.3.6 (live with the clutter)
402 - Fix missing error return in gzflush(), add zlib.h note
403 - Add *64 functions to zlib.map [Levin]
404 - Fix signed/unsigned comparison in gz_comp()
405 - Use SFLAGS when testing shared linking in configure
406 - Add --64 option to ./configure to use -m64 with gcc
407 - Fix ./configure --help to correctly name options
408 - Have make fail if a test fails [Levin]
409 - Avoid buffer overrun in contrib/masmx64/gvmat64.asm [Simpson]
410 - Remove assembler object files from contrib
411  
412 Changes in 1.2.3.7 (24 Jan 2010)
413 - Always gzopen() with O_LARGEFILE if available
414 - Fix gzdirect() to work immediately after gzopen() or gzdopen()
415 - Make gzdirect() more precise when the state changes while reading
416 - Improve zlib.h documentation in many places
417 - Catch memory allocation failure in gz_open()
418 - Complete close operation if seek forward in gzclose_w() fails
419 - Return Z_ERRNO from gzclose_r() if close() fails
420 - Return Z_STREAM_ERROR instead of EOF for gzclose() being passed NULL
421 - Return zero for gzwrite() errors to match zlib.h description
422 - Return -1 on gzputs() error to match zlib.h description
423 - Add zconf.in.h to allow recovery from configure modification [Weigelt]
424 - Fix static library permissions in Makefile.in [Weigelt]
425 - Avoid warnings in configure tests that hide functionality [Weigelt]
426 - Add *BSD and DragonFly to Linux case in configure [gentoo 123571]
427 - Change libzdll.a to libz.dll.a in win32/Makefile.gcc [gentoo 288212]
428 - Avoid access of uninitialized data for first inflateReset2 call [Gomes]
429 - Keep object files in subdirectories to reduce the clutter somewhat
430 - Remove default Makefile and zlibdefs.h, add dummy Makefile
431 - Add new external functions to Z_PREFIX, remove duplicates, z_z_ -> z_
432 - Remove zlibdefs.h completely -- modify zconf.h instead
433  
434 Changes in 1.2.3.6 (17 Jan 2010)
435 - Avoid void * arithmetic in gzread.c and gzwrite.c
436 - Make compilers happier with const char * for gz_error message
437 - Avoid unused parameter warning in inflate.c
438 - Avoid signed-unsigned comparison warning in inflate.c
439 - Indent #pragma's for traditional C
440 - Fix usage of strwinerror() in glib.c, change to gz_strwinerror()
441 - Correct email address in configure for system options
442 - Update make_vms.com and add make_vms.com to contrib/minizip [Zinser]
443 - Update zlib.map [Brown]
444 - Fix Makefile.in for Solaris 10 make of example64 and minizip64 [Torok]
445 - Apply various fixes to CMakeLists.txt [Lowman]
446 - Add checks on len in gzread() and gzwrite()
447 - Add error message for no more room for gzungetc()
448 - Remove zlib version check in gzwrite()
449 - Defer compression of gzprintf() result until need to
450 - Use snprintf() in gzdopen() if available
451 - Remove USE_MMAP configuration determination (only used by minigzip)
452 - Remove examples/pigz.c (available separately)
453 - Update examples/gun.c to 1.6
454  
455 Changes in 1.2.3.5 (8 Jan 2010)
456 - Add space after #if in zutil.h for some compilers
457 - Fix relatively harmless bug in deflate_fast() [Exarevsky]
458 - Fix same problem in deflate_slow()
459 - Add $(SHAREDLIBV) to LIBS in Makefile.in [Brown]
460 - Add deflate_rle() for faster Z_RLE strategy run-length encoding
461 - Add deflate_huff() for faster Z_HUFFMAN_ONLY encoding
462 - Change name of "write" variable in inffast.c to avoid library collisions
463 - Fix premature EOF from gzread() in gzio.c [Brown]
464 - Use zlib header window size if windowBits is 0 in inflateInit2()
465 - Remove compressBound() call in deflate.c to avoid linking compress.o
466 - Replace use of errno in gz* with functions, support WinCE [Alves]
467 - Provide alternative to perror() in minigzip.c for WinCE [Alves]
468 - Don't use _vsnprintf on later versions of MSVC [Lowman]
469 - Add CMake build script and input file [Lowman]
470 - Update contrib/minizip to 1.1 [Svensson, Vollant]
471 - Moved nintendods directory from contrib to .
472 - Replace gzio.c with a new set of routines with the same functionality
473 - Add gzbuffer(), gzoffset(), gzclose_r(), gzclose_w() as part of above
474 - Update contrib/minizip to 1.1b
475 - Change gzeof() to return 0 on error instead of -1 to agree with zlib.h
476  
477 Changes in 1.2.3.4 (21 Dec 2009)
478 - Use old school .SUFFIXES in Makefile.in for FreeBSD compatibility
479 - Update comments in configure and Makefile.in for default --shared
480 - Fix test -z's in configure [Marquess]
481 - Build examplesh and minigzipsh when not testing
482 - Change NULL's to Z_NULL's in deflate.c and in comments in zlib.h
483 - Import LDFLAGS from the environment in configure
484 - Fix configure to populate SFLAGS with discovered CFLAGS options
485 - Adapt make_vms.com to the new Makefile.in [Zinser]
486 - Add zlib2ansi script for C++ compilation [Marquess]
487 - Add _FILE_OFFSET_BITS=64 test to make test (when applicable)
488 - Add AMD64 assembler code for longest match to contrib [Teterin]
489 - Include options from $SFLAGS when doing $LDSHARED
490 - Simplify 64-bit file support by introducing z_off64_t type
491 - Make shared object files in objs directory to work around old Sun cc
492 - Use only three-part version number for Darwin shared compiles
493 - Add rc option to ar in Makefile.in for when ./configure not run
494 - Add -WI,-rpath,. to LDFLAGS for OSF 1 V4*
495 - Set LD_LIBRARYN32_PATH for SGI IRIX shared compile
496 - Protect against _FILE_OFFSET_BITS being defined when compiling zlib
497 - Rename Makefile.in targets allstatic to static and allshared to shared
498 - Fix static and shared Makefile.in targets to be independent
499 - Correct error return bug in gz_open() by setting state [Brown]
500 - Put spaces before ;;'s in configure for better sh compatibility
501 - Add pigz.c (parallel implementation of gzip) to examples/
502 - Correct constant in crc32.c to UL [Leventhal]
503 - Reject negative lengths in crc32_combine()
504 - Add inflateReset2() function to work like inflateEnd()/inflateInit2()
505 - Include sys/types.h for _LARGEFILE64_SOURCE [Brown]
506 - Correct typo in doc/algorithm.txt [Janik]
507 - Fix bug in adler32_combine() [Zhu]
508 - Catch missing-end-of-block-code error in all inflates and in puff
509 Assures that random input to inflate eventually results in an error
510 - Added enough.c (calculation of ENOUGH for inftrees.h) to examples/
511 - Update ENOUGH and its usage to reflect discovered bounds
512 - Fix gzerror() error report on empty input file [Brown]
513 - Add ush casts in trees.c to avoid pedantic runtime errors
514 - Fix typo in zlib.h uncompress() description [Reiss]
515 - Correct inflate() comments with regard to automatic header detection
516 - Remove deprecation comment on Z_PARTIAL_FLUSH (it stays)
517 - Put new version of gzlog (2.0) in examples with interruption recovery
518 - Add puff compile option to permit invalid distance-too-far streams
519 - Add puff TEST command options, ability to read piped input
520 - Prototype the *64 functions in zlib.h when _FILE_OFFSET_BITS == 64, but
521 _LARGEFILE64_SOURCE not defined
522 - Fix Z_FULL_FLUSH to truly erase the past by resetting s->strstart
523 - Fix deflateSetDictionary() to use all 32K for output consistency
524 - Remove extraneous #define MIN_LOOKAHEAD in deflate.c (in deflate.h)
525 - Clear bytes after deflate lookahead to avoid use of uninitialized data
526 - Change a limit in inftrees.c to be more transparent to Coverity Prevent
527 - Update win32/zlib.def with exported symbols from zlib.h
528 - Correct spelling errors in zlib.h [Willem, Sobrado]
529 - Allow Z_BLOCK for deflate() to force a new block
530 - Allow negative bits in inflatePrime() to delete existing bit buffer
531 - Add Z_TREES flush option to inflate() to return at end of trees
532 - Add inflateMark() to return current state information for random access
533 - Add Makefile for NintendoDS to contrib [Costa]
534 - Add -w in configure compile tests to avoid spurious warnings [Beucler]
535 - Fix typos in zlib.h comments for deflateSetDictionary()
536 - Fix EOF detection in transparent gzread() [Maier]
537  
538 Changes in 1.2.3.3 (2 October 2006)
539 - Make --shared the default for configure, add a --static option
540 - Add compile option to permit invalid distance-too-far streams
541 - Add inflateUndermine() function which is required to enable above
542 - Remove use of "this" variable name for C++ compatibility [Marquess]
543 - Add testing of shared library in make test, if shared library built
544 - Use ftello() and fseeko() if available instead of ftell() and fseek()
545 - Provide two versions of all functions that use the z_off_t type for
546 binary compatibility -- a normal version and a 64-bit offset version,
547 per the Large File Support Extension when _LARGEFILE64_SOURCE is
548 defined; use the 64-bit versions by default when _FILE_OFFSET_BITS
549 is defined to be 64
550 - Add a --uname= option to configure to perhaps help with cross-compiling
551  
552 Changes in 1.2.3.2 (3 September 2006)
553 - Turn off silly Borland warnings [Hay]
554 - Use off64_t and define _LARGEFILE64_SOURCE when present
555 - Fix missing dependency on inffixed.h in Makefile.in
556 - Rig configure --shared to build both shared and static [Teredesai, Truta]
557 - Remove zconf.in.h and instead create a new zlibdefs.h file
558 - Fix contrib/minizip/unzip.c non-encrypted after encrypted [Vollant]
559 - Add treebuild.xml (see http://treebuild.metux.de/) [Weigelt]
560  
561 Changes in 1.2.3.1 (16 August 2006)
562 - Add watcom directory with OpenWatcom make files [Daniel]
563 - Remove #undef of FAR in zconf.in.h for MVS [Fedtke]
564 - Update make_vms.com [Zinser]
565 - Use -fPIC for shared build in configure [Teredesai, Nicholson]
566 - Use only major version number for libz.so on IRIX and OSF1 [Reinholdtsen]
567 - Use fdopen() (not _fdopen()) for Interix in zutil.h [BŠck]
568 - Add some FAQ entries about the contrib directory
569 - Update the MVS question in the FAQ
570 - Avoid extraneous reads after EOF in gzio.c [Brown]
571 - Correct spelling of "successfully" in gzio.c [Randers-Pehrson]
572 - Add comments to zlib.h about gzerror() usage [Brown]
573 - Set extra flags in gzip header in gzopen() like deflate() does
574 - Make configure options more compatible with double-dash conventions
575 [Weigelt]
576 - Clean up compilation under Solaris SunStudio cc [Rowe, Reinholdtsen]
577 - Fix uninstall target in Makefile.in [Truta]
578 - Add pkgconfig support [Weigelt]
579 - Use $(DESTDIR) macro in Makefile.in [Reinholdtsen, Weigelt]
580 - Replace set_data_type() with a more accurate detect_data_type() in
581 trees.c, according to the txtvsbin.txt document [Truta]
582 - Swap the order of #include <stdio.h> and #include "zlib.h" in
583 gzio.c, example.c and minigzip.c [Truta]
584 - Shut up annoying VS2005 warnings about standard C deprecation [Rowe,
585 Truta] (where?)
586 - Fix target "clean" from win32/Makefile.bor [Truta]
587 - Create .pdb and .manifest files in win32/makefile.msc [Ziegler, Rowe]
588 - Update zlib www home address in win32/DLL_FAQ.txt [Truta]
589 - Update contrib/masmx86/inffas32.asm for VS2005 [Vollant, Van Wassenhove]
590 - Enable browse info in the "Debug" and "ASM Debug" configurations in
591 the Visual C++ 6 project, and set (non-ASM) "Debug" as default [Truta]
592 - Add pkgconfig support [Weigelt]
593 - Add ZLIB_VER_MAJOR, ZLIB_VER_MINOR and ZLIB_VER_REVISION in zlib.h,
594 for use in win32/zlib1.rc [Polushin, Rowe, Truta]
595 - Add a document that explains the new text detection scheme to
596 doc/txtvsbin.txt [Truta]
597 - Add rfc1950.txt, rfc1951.txt and rfc1952.txt to doc/ [Truta]
598 - Move algorithm.txt into doc/ [Truta]
599 - Synchronize FAQ with website
600 - Fix compressBound(), was low for some pathological cases [Fearnley]
601 - Take into account wrapper variations in deflateBound()
602 - Set examples/zpipe.c input and output to binary mode for Windows
603 - Update examples/zlib_how.html with new zpipe.c (also web site)
604 - Fix some warnings in examples/gzlog.c and examples/zran.c (it seems
605 that gcc became pickier in 4.0)
606 - Add zlib.map for Linux: "All symbols from zlib-1.1.4 remain
607 un-versioned, the patch adds versioning only for symbols introduced in
608 zlib-1.2.0 or later. It also declares as local those symbols which are
609 not designed to be exported." [Levin]
610 - Update Z_PREFIX list in zconf.in.h, add --zprefix option to configure
611 - Do not initialize global static by default in trees.c, add a response
612 NO_INIT_GLOBAL_POINTERS to initialize them if needed [Marquess]
613 - Don't use strerror() in gzio.c under WinCE [Yakimov]
614 - Don't use errno.h in zutil.h under WinCE [Yakimov]
615 - Move arguments for AR to its usage to allow replacing ar [Marot]
616 - Add HAVE_VISIBILITY_PRAGMA in zconf.in.h for Mozilla [Randers-Pehrson]
617 - Improve inflateInit() and inflateInit2() documentation
618 - Fix structure size comment in inflate.h
619 - Change configure help option from --h* to --help [Santos]
620  
621 Changes in 1.2.3 (18 July 2005)
622 - Apply security vulnerability fixes to contrib/infback9 as well
623 - Clean up some text files (carriage returns, trailing space)
624 - Update testzlib, vstudio, masmx64, and masmx86 in contrib [Vollant]
625  
626 Changes in 1.2.2.4 (11 July 2005)
627 - Add inflatePrime() function for starting inflation at bit boundary
628 - Avoid some Visual C warnings in deflate.c
629 - Avoid more silly Visual C warnings in inflate.c and inftrees.c for 64-bit
630 compile
631 - Fix some spelling errors in comments [Betts]
632 - Correct inflateInit2() error return documentation in zlib.h
633 - Add zran.c example of compressed data random access to examples
634 directory, shows use of inflatePrime()
635 - Fix cast for assignments to strm->state in inflate.c and infback.c
636 - Fix zlibCompileFlags() in zutil.c to use 1L for long shifts [Oberhumer]
637 - Move declarations of gf2 functions to right place in crc32.c [Oberhumer]
638 - Add cast in trees.c t avoid a warning [Oberhumer]
639 - Avoid some warnings in fitblk.c, gun.c, gzjoin.c in examples [Oberhumer]
640 - Update make_vms.com [Zinser]
641 - Initialize state->write in inflateReset() since copied in inflate_fast()
642 - Be more strict on incomplete code sets in inflate_table() and increase
643 ENOUGH and MAXD -- this repairs a possible security vulnerability for
644 invalid inflate input. Thanks to Tavis Ormandy and Markus Oberhumer for
645 discovering the vulnerability and providing test cases.
646 - Add ia64 support to configure for HP-UX [Smith]
647 - Add error return to gzread() for format or i/o error [Levin]
648 - Use malloc.h for OS/2 [Necasek]
649  
650 Changes in 1.2.2.3 (27 May 2005)
651 - Replace 1U constants in inflate.c and inftrees.c for 64-bit compile
652 - Typecast fread() return values in gzio.c [Vollant]
653 - Remove trailing space in minigzip.c outmode (VC++ can't deal with it)
654 - Fix crc check bug in gzread() after gzungetc() [Heiner]
655 - Add the deflateTune() function to adjust internal compression parameters
656 - Add a fast gzip decompressor, gun.c, to examples (use of inflateBack)
657 - Remove an incorrect assertion in examples/zpipe.c
658 - Add C++ wrapper in infback9.h [Donais]
659 - Fix bug in inflateCopy() when decoding fixed codes
660 - Note in zlib.h how much deflateSetDictionary() actually uses
661 - Remove USE_DICT_HEAD in deflate.c (would mess up inflate if used)
662 - Add _WIN32_WCE to define WIN32 in zconf.in.h [Spencer]
663 - Don't include stderr.h or errno.h for _WIN32_WCE in zutil.h [Spencer]
664 - Add gzdirect() function to indicate transparent reads
665 - Update contrib/minizip [Vollant]
666 - Fix compilation of deflate.c when both ASMV and FASTEST [Oberhumer]
667 - Add casts in crc32.c to avoid warnings [Oberhumer]
668 - Add contrib/masmx64 [Vollant]
669 - Update contrib/asm586, asm686, masmx86, testzlib, vstudio [Vollant]
670  
671 Changes in 1.2.2.2 (30 December 2004)
672 - Replace structure assignments in deflate.c and inflate.c with zmemcpy to
673 avoid implicit memcpy calls (portability for no-library compilation)
674 - Increase sprintf() buffer size in gzdopen() to allow for large numbers
675 - Add INFLATE_STRICT to check distances against zlib header
676 - Improve WinCE errno handling and comments [Chang]
677 - Remove comment about no gzip header processing in FAQ
678 - Add Z_FIXED strategy option to deflateInit2() to force fixed trees
679 - Add updated make_vms.com [Coghlan], update README
680 - Create a new "examples" directory, move gzappend.c there, add zpipe.c,
681 fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html.
682 - Add FAQ entry and comments in deflate.c on uninitialized memory access
683 - Add Solaris 9 make options in configure [Gilbert]
684 - Allow strerror() usage in gzio.c for STDC
685 - Fix DecompressBuf in contrib/delphi/ZLib.pas [ManChesTer]
686 - Update contrib/masmx86/inffas32.asm and gvmat32.asm [Vollant]
687 - Use z_off_t for adler32_combine() and crc32_combine() lengths
688 - Make adler32() much faster for small len
689 - Use OS_CODE in deflate() default gzip header
690  
691 Changes in 1.2.2.1 (31 October 2004)
692 - Allow inflateSetDictionary() call for raw inflate
693 - Fix inflate header crc check bug for file names and comments
694 - Add deflateSetHeader() and gz_header structure for custom gzip headers
695 - Add inflateGetheader() to retrieve gzip headers
696 - Add crc32_combine() and adler32_combine() functions
697 - Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
698 - Use zstreamp consistently in zlib.h (inflate_back functions)
699 - Remove GUNZIP condition from definition of inflate_mode in inflate.h
700 and in contrib/inflate86/inffast.S [Truta, Anderson]
701 - Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
702 - Update projects/README.projects and projects/visualc6 [Truta]
703 - Update win32/DLL_FAQ.txt [Truta]
704 - Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
705 - Deprecate Z_ASCII; use Z_TEXT instead [Truta]
706 - Use a new algorithm for setting strm->data_type in trees.c [Truta]
707 - Do not define an exit() prototype in zutil.c unless DEBUG defined
708 - Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
709 - Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
710 - Fix Darwin build version identification [Peterson]
711  
712 Changes in 1.2.2 (3 October 2004)
713 - Update zlib.h comments on gzip in-memory processing
714 - Set adler to 1 in inflateReset() to support Java test suite [Walles]
715 - Add contrib/dotzlib [Ravn]
716 - Update win32/DLL_FAQ.txt [Truta]
717 - Update contrib/minizip [Vollant]
718 - Move contrib/visual-basic.txt to old/ [Truta]
719 - Fix assembler builds in projects/visualc6/ [Truta]
720  
721 Changes in 1.2.1.2 (9 September 2004)
722 - Update INDEX file
723 - Fix trees.c to update strm->data_type (no one ever noticed!)
724 - Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
725 - Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
726 - Add limited multitasking protection to DYNAMIC_CRC_TABLE
727 - Add NO_vsnprintf for VMS in zutil.h [Mozilla]
728 - Don't declare strerror() under VMS [Mozilla]
729 - Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
730 - Update contrib/ada [Anisimkov]
731 - Update contrib/minizip [Vollant]
732 - Fix configure to not hardcode directories for Darwin [Peterson]
733 - Fix gzio.c to not return error on empty files [Brown]
734 - Fix indentation; update version in contrib/delphi/ZLib.pas and
735 contrib/pascal/zlibpas.pas [Truta]
736 - Update mkasm.bat in contrib/masmx86 [Truta]
737 - Update contrib/untgz [Truta]
738 - Add projects/README.projects [Truta]
739 - Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
740 - Update win32/DLL_FAQ.txt [Truta]
741 - Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
742 - Remove an unnecessary assignment to curr in inftrees.c [Truta]
743 - Add OS/2 to exe builds in configure [Poltorak]
744 - Remove err dummy parameter in zlib.h [Kientzle]
745  
746 Changes in 1.2.1.1 (9 January 2004)
747 - Update email address in README
748 - Several FAQ updates
749 - Fix a big fat bug in inftrees.c that prevented decoding valid
750 dynamic blocks with only literals and no distance codes --
751 Thanks to "Hot Emu" for the bug report and sample file
752 - Add a note to puff.c on no distance codes case.
753  
754 Changes in 1.2.1 (17 November 2003)
755 - Remove a tab in contrib/gzappend/gzappend.c
756 - Update some interfaces in contrib for new zlib functions
757 - Update zlib version number in some contrib entries
758 - Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
759 - Support shared libraries on Hurd and KFreeBSD [Brown]
760 - Fix error in NO_DIVIDE option of adler32.c
761  
762 Changes in 1.2.0.8 (4 November 2003)
763 - Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
764 - Add experimental NO_DIVIDE #define in adler32.c
765 - Possibly faster on some processors (let me know if it is)
766 - Correct Z_BLOCK to not return on first inflate call if no wrap
767 - Fix strm->data_type on inflate() return to correctly indicate EOB
768 - Add deflatePrime() function for appending in the middle of a byte
769 - Add contrib/gzappend for an example of appending to a stream
770 - Update win32/DLL_FAQ.txt [Truta]
771 - Delete Turbo C comment in README [Truta]
772 - Improve some indentation in zconf.h [Truta]
773 - Fix infinite loop on bad input in configure script [Church]
774 - Fix gzeof() for concatenated gzip files [Johnson]
775 - Add example to contrib/visual-basic.txt [Michael B.]
776 - Add -p to mkdir's in Makefile.in [vda]
777 - Fix configure to properly detect presence or lack of printf functions
778 - Add AS400 support [Monnerat]
779 - Add a little Cygwin support [Wilson]
780  
781 Changes in 1.2.0.7 (21 September 2003)
782 - Correct some debug formats in contrib/infback9
783 - Cast a type in a debug statement in trees.c
784 - Change search and replace delimiter in configure from % to # [Beebe]
785 - Update contrib/untgz to 0.2 with various fixes [Truta]
786 - Add build support for Amiga [Nikl]
787 - Remove some directories in old that have been updated to 1.2
788 - Add dylib building for Mac OS X in configure and Makefile.in
789 - Remove old distribution stuff from Makefile
790 - Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
791 - Update links in README
792  
793 Changes in 1.2.0.6 (13 September 2003)
794 - Minor FAQ updates
795 - Update contrib/minizip to 1.00 [Vollant]
796 - Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
797 - Update POSTINC comment for 68060 [Nikl]
798 - Add contrib/infback9 with deflate64 decoding (unsupported)
799 - For MVS define NO_vsnprintf and undefine FAR [van Burik]
800 - Add pragma for fdopen on MVS [van Burik]
801  
802 Changes in 1.2.0.5 (8 September 2003)
803 - Add OF to inflateBackEnd() declaration in zlib.h
804 - Remember start when using gzdopen in the middle of a file
805 - Use internal off_t counters in gz* functions to properly handle seeks
806 - Perform more rigorous check for distance-too-far in inffast.c
807 - Add Z_BLOCK flush option to return from inflate at block boundary
808 - Set strm->data_type on return from inflate
809 - Indicate bits unused, if at block boundary, and if in last block
810 - Replace size_t with ptrdiff_t in crc32.c, and check for correct size
811 - Add condition so old NO_DEFLATE define still works for compatibility
812 - FAQ update regarding the Windows DLL [Truta]
813 - INDEX update: add qnx entry, remove aix entry [Truta]
814 - Install zlib.3 into mandir [Wilson]
815 - Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
816 - Adapt the zlib interface to the new DLL convention guidelines [Truta]
817 - Introduce ZLIB_WINAPI macro to allow the export of functions using
818 the WINAPI calling convention, for Visual Basic [Vollant, Truta]
819 - Update msdos and win32 scripts and makefiles [Truta]
820 - Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
821 - Add contrib/ada [Anisimkov]
822 - Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
823 - Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
824 - Add contrib/masm686 [Truta]
825 - Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
826 [Truta, Vollant]
827 - Update contrib/delphi; rename to contrib/pascal; add example [Truta]
828 - Remove contrib/delphi2; add a new contrib/delphi [Truta]
829 - Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
830 and fix some method prototypes [Truta]
831 - Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
832 [Truta]
833 - Avoid the use of backslash (\) in contrib/minizip [Vollant]
834 - Fix file time handling in contrib/untgz; update makefiles [Truta]
835 - Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
836 [Vollant]
837 - Remove contrib/vstudio/vc15_16 [Vollant]
838 - Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
839 - Update README.contrib [Truta]
840 - Invert the assignment order of match_head and s->prev[...] in
841 INSERT_STRING [Truta]
842 - Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
843 [Truta]
844 - Compare function pointers with 0, not with NULL or Z_NULL [Truta]
845 - Fix prototype of syncsearch in inflate.c [Truta]
846 - Introduce ASMINF macro to be enabled when using an ASM implementation
847 of inflate_fast [Truta]
848 - Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
849 - Modify test_gzio in example.c to take a single file name as a
850 parameter [Truta]
851 - Exit the example.c program if gzopen fails [Truta]
852 - Add type casts around strlen in example.c [Truta]
853 - Remove casting to sizeof in minigzip.c; give a proper type
854 to the variable compared with SUFFIX_LEN [Truta]
855 - Update definitions of STDC and STDC99 in zconf.h [Truta]
856 - Synchronize zconf.h with the new Windows DLL interface [Truta]
857 - Use SYS16BIT instead of __32BIT__ to distinguish between
858 16- and 32-bit platforms [Truta]
859 - Use far memory allocators in small 16-bit memory models for
860 Turbo C [Truta]
861 - Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
862 zlibCompileFlags [Truta]
863 - Cygwin has vsnprintf [Wilson]
864 - In Windows16, OS_CODE is 0, as in MSDOS [Truta]
865 - In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
866  
867 Changes in 1.2.0.4 (10 August 2003)
868 - Minor FAQ updates
869 - Be more strict when checking inflateInit2's windowBits parameter
870 - Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
871 - Add gzip wrapper option to deflateInit2 using windowBits
872 - Add updated QNX rule in configure and qnx directory [Bonnefoy]
873 - Make inflate distance-too-far checks more rigorous
874 - Clean up FAR usage in inflate
875 - Add casting to sizeof() in gzio.c and minigzip.c
876  
877 Changes in 1.2.0.3 (19 July 2003)
878 - Fix silly error in gzungetc() implementation [Vollant]
879 - Update contrib/minizip and contrib/vstudio [Vollant]
880 - Fix printf format in example.c
881 - Correct cdecl support in zconf.in.h [Anisimkov]
882 - Minor FAQ updates
883  
884 Changes in 1.2.0.2 (13 July 2003)
885 - Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
886 - Attempt to avoid warnings in crc32.c for pointer-int conversion
887 - Add AIX to configure, remove aix directory [Bakker]
888 - Add some casts to minigzip.c
889 - Improve checking after insecure sprintf() or vsprintf() calls
890 - Remove #elif's from crc32.c
891 - Change leave label to inf_leave in inflate.c and infback.c to avoid
892 library conflicts
893 - Remove inflate gzip decoding by default--only enable gzip decoding by
894 special request for stricter backward compatibility
895 - Add zlibCompileFlags() function to return compilation information
896 - More typecasting in deflate.c to avoid warnings
897 - Remove leading underscore from _Capital #defines [Truta]
898 - Fix configure to link shared library when testing
899 - Add some Windows CE target adjustments [Mai]
900 - Remove #define ZLIB_DLL in zconf.h [Vollant]
901 - Add zlib.3 [Rodgers]
902 - Update RFC URL in deflate.c and algorithm.txt [Mai]
903 - Add zlib_dll_FAQ.txt to contrib [Truta]
904 - Add UL to some constants [Truta]
905 - Update minizip and vstudio [Vollant]
906 - Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
907 - Expand use of NO_DUMMY_DECL to avoid all dummy structures
908 - Added iostream3 to contrib [Schwardt]
909 - Replace rewind() with fseek() for WinCE [Truta]
910 - Improve setting of zlib format compression level flags
911 - Report 0 for huffman and rle strategies and for level == 0 or 1
912 - Report 2 only for level == 6
913 - Only deal with 64K limit when necessary at compile time [Truta]
914 - Allow TOO_FAR check to be turned off at compile time [Truta]
915 - Add gzclearerr() function [Souza]
916 - Add gzungetc() function
917  
918 Changes in 1.2.0.1 (17 March 2003)
919 - Add Z_RLE strategy for run-length encoding [Truta]
920 - When Z_RLE requested, restrict matches to distance one
921 - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
922 - Correct FASTEST compilation to allow level == 0
923 - Clean up what gets compiled for FASTEST
924 - Incorporate changes to zconf.in.h [Vollant]
925 - Refine detection of Turbo C need for dummy returns
926 - Refine ZLIB_DLL compilation
927 - Include additional header file on VMS for off_t typedef
928 - Try to use _vsnprintf where it supplants vsprintf [Vollant]
929 - Add some casts in inffast.c
930 - Enchance comments in zlib.h on what happens if gzprintf() tries to
931 write more than 4095 bytes before compression
932 - Remove unused state from inflateBackEnd()
933 - Remove exit(0) from minigzip.c, example.c
934 - Get rid of all those darn tabs
935 - Add "check" target to Makefile.in that does the same thing as "test"
936 - Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
937 - Update contrib/inflate86 [Anderson]
938 - Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
939 - Add msdos and win32 directories with makefiles [Truta]
940 - More additions and improvements to the FAQ
941  
942 Changes in 1.2.0 (9 March 2003)
943 - New and improved inflate code
944 - About 20% faster
945 - Does not allocate 32K window unless and until needed
946 - Automatically detects and decompresses gzip streams
947 - Raw inflate no longer needs an extra dummy byte at end
948 - Added inflateBack functions using a callback interface--even faster
949 than inflate, useful for file utilities (gzip, zip)
950 - Added inflateCopy() function to record state for random access on
951 externally generated deflate streams (e.g. in gzip files)
952 - More readable code (I hope)
953 - New and improved crc32()
954 - About 50% faster, thanks to suggestions from Rodney Brown
955 - Add deflateBound() and compressBound() functions
956 - Fix memory leak in deflateInit2()
957 - Permit setting dictionary for raw deflate (for parallel deflate)
958 - Fix const declaration for gzwrite()
959 - Check for some malloc() failures in gzio.c
960 - Fix bug in gzopen() on single-byte file 0x1f
961 - Fix bug in gzread() on concatenated file with 0x1f at end of buffer
962 and next buffer doesn't start with 0x8b
963 - Fix uncompress() to return Z_DATA_ERROR on truncated input
964 - Free memory at end of example.c
965 - Remove MAX #define in trees.c (conflicted with some libraries)
966 - Fix static const's in deflate.c, gzio.c, and zutil.[ch]
967 - Declare malloc() and free() in gzio.c if STDC not defined
968 - Use malloc() instead of calloc() in zutil.c if int big enough
969 - Define STDC for AIX
970 - Add aix/ with approach for compiling shared library on AIX
971 - Add HP-UX support for shared libraries in configure
972 - Add OpenUNIX support for shared libraries in configure
973 - Use $cc instead of gcc to build shared library
974 - Make prefix directory if needed when installing
975 - Correct Macintosh avoidance of typedef Byte in zconf.h
976 - Correct Turbo C memory allocation when under Linux
977 - Use libz.a instead of -lz in Makefile (assure use of compiled library)
978 - Update configure to check for snprintf or vsnprintf functions and their
979 return value, warn during make if using an insecure function
980 - Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
981 is lost when library is used--resolution is to build new zconf.h
982 - Documentation improvements (in zlib.h):
983 - Document raw deflate and inflate
984 - Update RFCs URL
985 - Point out that zlib and gzip formats are different
986 - Note that Z_BUF_ERROR is not fatal
987 - Document string limit for gzprintf() and possible buffer overflow
988 - Note requirement on avail_out when flushing
989 - Note permitted values of flush parameter of inflate()
990 - Add some FAQs (and even answers) to the FAQ
991 - Add contrib/inflate86/ for x86 faster inflate
992 - Add contrib/blast/ for PKWare Data Compression Library decompression
993 - Add contrib/puff/ simple inflate for deflate format description
994  
995 Changes in 1.1.4 (11 March 2002)
996 - ZFREE was repeated on same allocation on some error conditions.
997 This creates a security problem described in
998 http://www.zlib.org/advisory-2002-03-11.txt
999 - Returned incorrect error (Z_MEM_ERROR) on some invalid data
1000 - Avoid accesses before window for invalid distances with inflate window
1001 less than 32K.
1002 - force windowBits > 8 to avoid a bug in the encoder for a window size
1003 of 256 bytes. (A complete fix will be available in 1.1.5).
1004  
1005 Changes in 1.1.3 (9 July 1998)
1006 - fix "an inflate input buffer bug that shows up on rare but persistent
1007 occasions" (Mark)
1008 - fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
1009 - fix gzseek(..., SEEK_SET) in write mode
1010 - fix crc check after a gzeek (Frank Faubert)
1011 - fix miniunzip when the last entry in a zip file is itself a zip file
1012 (J Lillge)
1013 - add contrib/asm586 and contrib/asm686 (Brian Raiter)
1014 See http://www.muppetlabs.com/~breadbox/software/assembly.html
1015 - add support for Delphi 3 in contrib/delphi (Bob Dellaca)
1016 - add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
1017 - do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
1018 - use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
1019 - added a FAQ file
1020  
1021 - Support gzdopen on Mac with Metrowerks (Jason Linhart)
1022 - Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
1023 - define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
1024 - avoid some warnings with Borland C (Tom Tanner)
1025 - fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
1026 - emulate utime() for WIN32 in contrib/untgz (Gilles Vollant)
1027 - allow several arguments to configure (Tim Mooney, Frodo Looijaard)
1028 - use libdir and includedir in Makefile.in (Tim Mooney)
1029 - support shared libraries on OSF1 V4 (Tim Mooney)
1030 - remove so_locations in "make clean" (Tim Mooney)
1031 - fix maketree.c compilation error (Glenn, Mark)
1032 - Python interface to zlib now in Python 1.5 (Jeremy Hylton)
1033 - new Makefile.riscos (Rich Walker)
1034 - initialize static descriptors in trees.c for embedded targets (Nick Smith)
1035 - use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
1036 - add the OS/2 files in Makefile.in too (Andrew Zabolotny)
1037 - fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
1038 - fix maketree.c to allow clean compilation of inffixed.h (Mark)
1039 - fix parameter check in deflateCopy (Gunther Nikl)
1040 - cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
1041 - Many portability patches by Christian Spieler:
1042 . zutil.c, zutil.h: added "const" for zmem*
1043 . Make_vms.com: fixed some typos
1044 . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
1045 . msdos/Makefile.msc: remove "default rtl link library" info from obj files
1046 . msdos/Makefile.*: use model-dependent name for the built zlib library
1047 . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
1048 new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
1049 - use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
1050 - replace __far with _far for better portability (Christian Spieler, Tom Lane)
1051 - fix test for errno.h in configure (Tim Newsham)
1052  
1053 Changes in 1.1.2 (19 March 98)
1054 - added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
1055 See http://www.winimage.com/zLibDll/unzip.html
1056 - preinitialize the inflate tables for fixed codes, to make the code
1057 completely thread safe (Mark)
1058 - some simplifications and slight speed-up to the inflate code (Mark)
1059 - fix gzeof on non-compressed files (Allan Schrum)
1060 - add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
1061 - use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
1062 - added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
1063 - add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
1064 - do not wrap extern "C" around system includes (Tom Lane)
1065 - mention zlib binding for TCL in README (Andreas Kupries)
1066 - added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
1067 - allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
1068 - allow "configure --prefix $HOME" (Tim Mooney)
1069 - remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
1070 - move Makefile.sas to amiga/Makefile.sas
1071  
1072 Changes in 1.1.1 (27 Feb 98)
1073 - fix macros _tr_tally_* in deflate.h for debug mode (Glenn Randers-Pehrson)
1074 - remove block truncation heuristic which had very marginal effect for zlib
1075 (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
1076 compression ratio on some files. This also allows inlining _tr_tally for
1077 matches in deflate_slow.
1078 - added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
1079  
1080 Changes in 1.1.0 (24 Feb 98)
1081 - do not return STREAM_END prematurely in inflate (John Bowler)
1082 - revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
1083 - compile with -DFASTEST to get compression code optimized for speed only
1084 - in minigzip, try mmap'ing the input file first (Miguel Albrecht)
1085 - increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
1086 on Sun but significant on HP)
1087  
1088 - add a pointer to experimental unzip library in README (Gilles Vollant)
1089 - initialize variable gcc in configure (Chris Herborth)
1090  
1091 Changes in 1.0.9 (17 Feb 1998)
1092 - added gzputs and gzgets functions
1093 - do not clear eof flag in gzseek (Mark Diekhans)
1094 - fix gzseek for files in transparent mode (Mark Diekhans)
1095 - do not assume that vsprintf returns the number of bytes written (Jens Krinke)
1096 - replace EXPORT with ZEXPORT to avoid conflict with other programs
1097 - added compress2 in zconf.h, zlib.def, zlib.dnt
1098 - new asm code from Gilles Vollant in contrib/asm386
1099 - simplify the inflate code (Mark):
1100 . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
1101 . ZALLOC the length list in inflate_trees_fixed() instead of using stack
1102 . ZALLOC the value area for huft_build() instead of using stack
1103 . Simplify Z_FINISH check in inflate()
1104  
1105 - Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
1106 - in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
1107 - in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
1108 the declaration of FAR (Gilles VOllant)
1109 - install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
1110 - read_buf buf parameter of type Bytef* instead of charf*
1111 - zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
1112 - do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
1113 - fix check for presence of directories in "make install" (Ian Willis)
1114  
1115 Changes in 1.0.8 (27 Jan 1998)
1116 - fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
1117 - fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
1118 - added compress2() to allow setting the compression level
1119 - include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
1120 - use constant arrays for the static trees in trees.c instead of computing
1121 them at run time (thanks to Ken Raeburn for this suggestion). To create
1122 trees.h, compile with GEN_TREES_H and run "make test".
1123 - check return code of example in "make test" and display result
1124 - pass minigzip command line options to file_compress
1125 - simplifying code of inflateSync to avoid gcc 2.8 bug
1126  
1127 - support CC="gcc -Wall" in configure -s (QingLong)
1128 - avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
1129 - fix test for shared library support to avoid compiler warnings
1130 - zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
1131 - check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
1132 - do not use fdopen for Metrowerks on Mac (Brad Pettit))
1133 - add checks for gzputc and gzputc in example.c
1134 - avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
1135 - use const for the CRC table (Ken Raeburn)
1136 - fixed "make uninstall" for shared libraries
1137 - use Tracev instead of Trace in infblock.c
1138 - in example.c use correct compressed length for test_sync
1139 - suppress +vnocompatwarnings in configure for HPUX (not always supported)
1140  
1141 Changes in 1.0.7 (20 Jan 1998)
1142 - fix gzseek which was broken in write mode
1143 - return error for gzseek to negative absolute position
1144 - fix configure for Linux (Chun-Chung Chen)
1145 - increase stack space for MSC (Tim Wegner)
1146 - get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
1147 - define EXPORTVA for gzprintf (Gilles Vollant)
1148 - added man page zlib.3 (Rick Rodgers)
1149 - for contrib/untgz, fix makedir() and improve Makefile
1150  
1151 - check gzseek in write mode in example.c
1152 - allocate extra buffer for seeks only if gzseek is actually called
1153 - avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
1154 - add inflateSyncPoint in zconf.h
1155 - fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
1156  
1157 Changes in 1.0.6 (19 Jan 1998)
1158 - add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
1159 gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
1160 - Fix a deflate bug occurring only with compression level 0 (thanks to
1161 Andy Buckler for finding this one).
1162 - In minigzip, pass transparently also the first byte for .Z files.
1163 - return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
1164 - check Z_FINISH in inflate (thanks to Marc Schluper)
1165 - Implement deflateCopy (thanks to Adam Costello)
1166 - make static libraries by default in configure, add --shared option.
1167 - move MSDOS or Windows specific files to directory msdos
1168 - suppress the notion of partial flush to simplify the interface
1169 (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
1170 - suppress history buffer provided by application to simplify the interface
1171 (this feature was not implemented anyway in 1.0.4)
1172 - next_in and avail_in must be initialized before calling inflateInit or
1173 inflateInit2
1174 - add EXPORT in all exported functions (for Windows DLL)
1175 - added Makefile.nt (thanks to Stephen Williams)
1176 - added the unsupported "contrib" directory:
1177 contrib/asm386/ by Gilles Vollant <info@winimage.com>
1178 386 asm code replacing longest_match().
1179 contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
1180 A C++ I/O streams interface to the zlib gz* functions
1181 contrib/iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no>
1182 Another C++ I/O streams interface
1183 contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
1184 A very simple tar.gz file extractor using zlib
1185 contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
1186 How to use compress(), uncompress() and the gz* functions from VB.
1187 - pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
1188 level) in minigzip (thanks to Tom Lane)
1189  
1190 - use const for rommable constants in deflate
1191 - added test for gzseek and gztell in example.c
1192 - add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
1193 - add undocumented function zError to convert error code to string
1194 (for Tim Smithers)
1195 - Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
1196 - Use default memcpy for Symantec MSDOS compiler.
1197 - Add EXPORT keyword for check_func (needed for Windows DLL)
1198 - add current directory to LD_LIBRARY_PATH for "make test"
1199 - create also a link for libz.so.1
1200 - added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
1201 - use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
1202 - added -soname for Linux in configure (Chun-Chung Chen,
1203 - assign numbers to the exported functions in zlib.def (for Windows DLL)
1204 - add advice in zlib.h for best usage of deflateSetDictionary
1205 - work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
1206 - allow compilation with ANSI keywords only enabled for TurboC in large model
1207 - avoid "versionString"[0] (Borland bug)
1208 - add NEED_DUMMY_RETURN for Borland
1209 - use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
1210 - allow compilation with CC
1211 - defined STDC for OS/2 (David Charlap)
1212 - limit external names to 8 chars for MVS (Thomas Lund)
1213 - in minigzip.c, use static buffers only for 16-bit systems
1214 - fix suffix check for "minigzip -d foo.gz"
1215 - do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
1216 - use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
1217 - added makelcc.bat for lcc-win32 (Tom St Denis)
1218 - in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
1219 - Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
1220 - check for unistd.h in configure (for off_t)
1221 - remove useless check parameter in inflate_blocks_free
1222 - avoid useless assignment of s->check to itself in inflate_blocks_new
1223 - do not flush twice in gzclose (thanks to Ken Raeburn)
1224 - rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
1225 - use NO_ERRNO_H instead of enumeration of operating systems with errno.h
1226 - work around buggy fclose on pipes for HP/UX
1227 - support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
1228 - fix configure if CC is already equal to gcc
1229  
1230 Changes in 1.0.5 (3 Jan 98)
1231 - Fix inflate to terminate gracefully when fed corrupted or invalid data
1232 - Use const for rommable constants in inflate
1233 - Eliminate memory leaks on error conditions in inflate
1234 - Removed some vestigial code in inflate
1235 - Update web address in README
1236  
1237 Changes in 1.0.4 (24 Jul 96)
1238 - In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
1239 bit, so the decompressor could decompress all the correct data but went
1240 on to attempt decompressing extra garbage data. This affected minigzip too.
1241 - zlibVersion and gzerror return const char* (needed for DLL)
1242 - port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
1243 - use z_error only for DEBUG (avoid problem with DLLs)
1244  
1245 Changes in 1.0.3 (2 Jul 96)
1246 - use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
1247 small and medium models; this makes the library incompatible with previous
1248 versions for these models. (No effect in large model or on other systems.)
1249 - return OK instead of BUF_ERROR if previous deflate call returned with
1250 avail_out as zero but there is nothing to do
1251 - added memcmp for non STDC compilers
1252 - define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
1253 - define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
1254 - better check for 16-bit mode MSC (avoids problem with Symantec)
1255  
1256 Changes in 1.0.2 (23 May 96)
1257 - added Windows DLL support
1258 - added a function zlibVersion (for the DLL support)
1259 - fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
1260 - Bytef is define's instead of typedef'd only for Borland C
1261 - avoid reading uninitialized memory in example.c
1262 - mention in README that the zlib format is now RFC1950
1263 - updated Makefile.dj2
1264 - added algorithm.doc
1265  
1266 Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
1267 - fix array overlay in deflate.c which sometimes caused bad compressed data
1268 - fix inflate bug with empty stored block
1269 - fix MSDOS medium model which was broken in 0.99
1270 - fix deflateParams() which could generated bad compressed data.
1271 - Bytef is define'd instead of typedef'ed (work around Borland bug)
1272 - added an INDEX file
1273 - new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
1274 Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
1275 - speed up adler32 for modern machines without auto-increment
1276 - added -ansi for IRIX in configure
1277 - static_init_done in trees.c is an int
1278 - define unlink as delete for VMS
1279 - fix configure for QNX
1280 - add configure branch for SCO and HPUX
1281 - avoid many warnings (unused variables, dead assignments, etc...)
1282 - no fdopen for BeOS
1283 - fix the Watcom fix for 32 bit mode (define FAR as empty)
1284 - removed redefinition of Byte for MKWERKS
1285 - work around an MWKERKS bug (incorrect merge of all .h files)
1286  
1287 Changes in 0.99 (27 Jan 96)
1288 - allow preset dictionary shared between compressor and decompressor
1289 - allow compression level 0 (no compression)
1290 - add deflateParams in zlib.h: allow dynamic change of compression level
1291 and compression strategy.
1292 - test large buffers and deflateParams in example.c
1293 - add optional "configure" to build zlib as a shared library
1294 - suppress Makefile.qnx, use configure instead
1295 - fixed deflate for 64-bit systems (detected on Cray)
1296 - fixed inflate_blocks for 64-bit systems (detected on Alpha)
1297 - declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
1298 - always return Z_BUF_ERROR when deflate() has nothing to do
1299 - deflateInit and inflateInit are now macros to allow version checking
1300 - prefix all global functions and types with z_ with -DZ_PREFIX
1301 - make falloc completely reentrant (inftrees.c)
1302 - fixed very unlikely race condition in ct_static_init
1303 - free in reverse order of allocation to help memory manager
1304 - use zlib-1.0/* instead of zlib/* inside the tar.gz
1305 - make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
1306 -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
1307 - allow gzread on concatenated .gz files
1308 - deflateEnd now returns Z_DATA_ERROR if it was premature
1309 - deflate is finally (?) fully deterministic (no matches beyond end of input)
1310 - Document Z_SYNC_FLUSH
1311 - add uninstall in Makefile
1312 - Check for __cpluplus in zlib.h
1313 - Better test in ct_align for partial flush
1314 - avoid harmless warnings for Borland C++
1315 - initialize hash_head in deflate.c
1316 - avoid warning on fdopen (gzio.c) for HP cc -Aa
1317 - include stdlib.h for STDC compilers
1318 - include errno.h for Cray
1319 - ignore error if ranlib doesn't exist
1320 - call ranlib twice for NeXTSTEP
1321 - use exec_prefix instead of prefix for libz.a
1322 - renamed ct_* as _tr_* to avoid conflict with applications
1323 - clear z->msg in inflateInit2 before any error return
1324 - initialize opaque in example.c, gzio.c, deflate.c and inflate.c
1325 - fixed typo in zconf.h (_GNUC__ => __GNUC__)
1326 - check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
1327 - fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
1328 - in fcalloc, normalize pointer if size > 65520 bytes
1329 - don't use special fcalloc for 32 bit Borland C++
1330 - use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
1331 - use Z_BINARY instead of BINARY
1332 - document that gzclose after gzdopen will close the file
1333 - allow "a" as mode in gzopen.
1334 - fix error checking in gzread
1335 - allow skipping .gz extra-field on pipes
1336 - added reference to Perl interface in README
1337 - put the crc table in FAR data (I dislike more and more the medium model :)
1338 - added get_crc_table
1339 - added a dimension to all arrays (Borland C can't count).
1340 - workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
1341 - guard against multiple inclusion of *.h (for precompiled header on Mac)
1342 - Watcom C pretends to be Microsoft C small model even in 32 bit mode.
1343 - don't use unsized arrays to avoid silly warnings by Visual C++:
1344 warning C4746: 'inflate_mask' : unsized array treated as '__far'
1345 (what's wrong with far data in far model?).
1346 - define enum out of inflate_blocks_state to allow compilation with C++
1347  
1348 Changes in 0.95 (16 Aug 95)
1349 - fix MSDOS small and medium model (now easier to adapt to any compiler)
1350 - inlined send_bits
1351 - fix the final (:-) bug for deflate with flush (output was correct but
1352 not completely flushed in rare occasions).
1353 - default window size is same for compression and decompression
1354 (it's now sufficient to set MAX_WBITS in zconf.h).
1355 - voidp -> voidpf and voidnp -> voidp (for consistency with other
1356 typedefs and because voidnp was not near in large model).
1357  
1358 Changes in 0.94 (13 Aug 95)
1359 - support MSDOS medium model
1360 - fix deflate with flush (could sometimes generate bad output)
1361 - fix deflateReset (zlib header was incorrectly suppressed)
1362 - added support for VMS
1363 - allow a compression level in gzopen()
1364 - gzflush now calls fflush
1365 - For deflate with flush, flush even if no more input is provided.
1366 - rename libgz.a as libz.a
1367 - avoid complex expression in infcodes.c triggering Turbo C bug
1368 - work around a problem with gcc on Alpha (in INSERT_STRING)
1369 - don't use inline functions (problem with some gcc versions)
1370 - allow renaming of Byte, uInt, etc... with #define.
1371 - avoid warning about (unused) pointer before start of array in deflate.c
1372 - avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
1373 - avoid reserved word 'new' in trees.c
1374  
1375 Changes in 0.93 (25 June 95)
1376 - temporarily disable inline functions
1377 - make deflate deterministic
1378 - give enough lookahead for PARTIAL_FLUSH
1379 - Set binary mode for stdin/stdout in minigzip.c for OS/2
1380 - don't even use signed char in inflate (not portable enough)
1381 - fix inflate memory leak for segmented architectures
1382  
1383 Changes in 0.92 (3 May 95)
1384 - don't assume that char is signed (problem on SGI)
1385 - Clear bit buffer when starting a stored block
1386 - no memcpy on Pyramid
1387 - suppressed inftest.c
1388 - optimized fill_window, put longest_match inline for gcc
1389 - optimized inflate on stored blocks.
1390 - untabify all sources to simplify patches
1391  
1392 Changes in 0.91 (2 May 95)
1393 - Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
1394 - Document the memory requirements in zconf.h
1395 - added "make install"
1396 - fix sync search logic in inflateSync
1397 - deflate(Z_FULL_FLUSH) now works even if output buffer too short
1398 - after inflateSync, don't scare people with just "lo world"
1399 - added support for DJGPP
1400  
1401 Changes in 0.9 (1 May 95)
1402 - don't assume that zalloc clears the allocated memory (the TurboC bug
1403 was Mark's bug after all :)
1404 - let again gzread copy uncompressed data unchanged (was working in 0.71)
1405 - deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
1406 - added a test of inflateSync in example.c
1407 - moved MAX_WBITS to zconf.h because users might want to change that.
1408 - document explicitly that zalloc(64K) on MSDOS must return a normalized
1409 pointer (zero offset)
1410 - added Makefiles for Microsoft C, Turbo C, Borland C++
1411 - faster crc32()
1412  
1413 Changes in 0.8 (29 April 95)
1414 - added fast inflate (inffast.c)
1415 - deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
1416 is incompatible with previous versions of zlib which returned Z_OK.
1417 - work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
1418 (actually that was not a compiler bug, see 0.81 above)
1419 - gzread no longer reads one extra byte in certain cases
1420 - In gzio destroy(), don't reference a freed structure
1421 - avoid many warnings for MSDOS
1422 - avoid the ERROR symbol which is used by MS Windows
1423  
1424 Changes in 0.71 (14 April 95)
1425 - Fixed more MSDOS compilation problems :( There is still a bug with
1426 TurboC large model.
1427  
1428 Changes in 0.7 (14 April 95)
1429 - Added full inflate support.
1430 - Simplified the crc32() interface. The pre- and post-conditioning
1431 (one's complement) is now done inside crc32(). WARNING: this is
1432 incompatible with previous versions; see zlib.h for the new usage.
1433  
1434 Changes in 0.61 (12 April 95)
1435 - workaround for a bug in TurboC. example and minigzip now work on MSDOS.
1436  
1437 Changes in 0.6 (11 April 95)
1438 - added minigzip.c
1439 - added gzdopen to reopen a file descriptor as gzFile
1440 - added transparent reading of non-gziped files in gzread.
1441 - fixed bug in gzread (don't read crc as data)
1442 - fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
1443 - don't allocate big arrays in the stack (for MSDOS)
1444 - fix some MSDOS compilation problems
1445  
1446 Changes in 0.5:
1447 - do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
1448 not yet Z_FULL_FLUSH.
1449 - support decompression but only in a single step (forced Z_FINISH)
1450 - added opaque object for zalloc and zfree.
1451 - added deflateReset and inflateReset
1452 - added a variable zlib_version for consistency checking.
1453 - renamed the 'filter' parameter of deflateInit2 as 'strategy'.
1454 Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
1455  
1456 Changes in 0.4:
1457 - avoid "zip" everywhere, use zlib instead of ziplib.
1458 - suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
1459 if compression method == 8.
1460 - added adler32 and crc32
1461 - renamed deflateOptions as deflateInit2, call one or the other but not both
1462 - added the method parameter for deflateInit2.
1463 - added inflateInit2
1464 - simplied considerably deflateInit and inflateInit by not supporting
1465 user-provided history buffer. This is supported only in deflateInit2
1466 and inflateInit2.
1467  
1468 Changes in 0.3:
1469 - prefix all macro names with Z_
1470 - use Z_FINISH instead of deflateEnd to finish compression.
1471 - added Z_HUFFMAN_ONLY
1472 - added gzerror()