1 
   2                 ChangeLog file for zlib
   3 
   4 Changes in 1.3.1 (22 Jan 2024)
   5 - Reject overflows of zip header fields in minizip
   6 - Fix bug in inflateSync() for data held in bit buffer
   7 - Add LIT_MEM define to use more memory for a small deflate speedup
   8 - Fix decision on the emission of Zip64 end records in minizip
   9 - Add bounds checking to ERR_MSG() macro, used by zError()
  10 - Neutralize zip file traversal attacks in miniunz
  11 - Fix a bug in ZLIB_DEBUG compiles in check_match()
  12 - Various portability and appearance improvements
  13 
  14 Changes in 1.3 (18 Aug 2023)
  15 - Remove K&R function definitions and zlib2ansi
  16 - Fix bug in deflateBound() for level 0 and memLevel 9
  17 - Fix bug when gzungetc() is used immediately after gzopen()
  18 - Fix bug when using gzflush() with a very small buffer
  19 - Fix crash when gzsetparams() attempted for transparent write
  20 - Fix test/example.c to work with FORCE_STORED
  21 - Rewrite of zran in examples (see zran.c version history)
  22 - Fix minizip to allow it to open an empty zip file
  23 - Fix reading disk number start on zip64 files in minizip
  24 - Fix logic error in minizip argument processing
  25 - Add minizip testing to Makefile
  26 - Read multiple bytes instead of byte-by-byte in minizip unzip.c
  27 - Add memory sanitizer to configure (--memory)
  28 - Various portability improvements
  29 - Various documentation improvements
  30 - Various spelling and typo corrections
  31 
  32 Changes in 1.2.13 (13 Oct 2022)
  33 - Fix configure issue that discarded provided CC definition
  34 - Correct incorrect inputs provided to the CRC functions
  35 - Repair prototypes and exporting of new CRC functions
  36 - Fix inflateBack to detect invalid input with distances too far
  37 - Have infback() deliver all of the available output up to any error
  38 - Fix a bug when getting a gzip header extra field with inflate()
  39 - Fix bug in block type selection when Z_FIXED used
  40 - Tighten deflateBound bounds
  41 - Remove deleted assembler code references
  42 - Various portability and appearance improvements
  43 
  44 Changes in 1.2.12 (27 Mar 2022)
  45 - Cygwin does not have _wopen(), so do not create gzopen_w() there
  46 - Permit a deflateParams() parameter change as soon as possible
  47 - Limit hash table inserts after switch from stored deflate
  48 - Fix bug when window full in deflate_stored()
  49 - Fix CLEAR_HASH macro to be usable as a single statement
  50 - Avoid a conversion error in gzseek when off_t type too small
  51 - Have Makefile return non-zero error code on test failure
  52 - Avoid some conversion warnings in gzread.c and gzwrite.c
  53 - Update use of errno for newer Windows CE versions
  54 - Small speedup to inflate [psumbera]
  55 - Return an error if the gzputs string length can't fit in an int
  56 - Add address checking in clang to -w option of configure
  57 - Don't compute check value for raw inflate if asked to validate
  58 - Handle case where inflateSync used when header never processed
  59 - Avoid the use of ptrdiff_t
  60 - Avoid an undefined behavior of memcpy() in gzappend()
  61 - Avoid undefined behaviors of memcpy() in gz*printf()
  62 - Avoid an undefined behavior of memcpy() in _tr_stored_block()
  63 - Make the names in functions declarations identical to definitions
  64 - Remove old assembler code in which bugs have manifested
  65 - Fix deflateEnd() to not report an error at start of raw deflate
  66 - Add legal disclaimer to README
  67 - Emphasize the need to continue decompressing gzip members
  68 - Correct the initialization requirements for deflateInit2()
  69 - Fix a bug that can crash deflate on some input when using Z_FIXED
  70 - Assure that the number of bits for deflatePrime() is valid
  71 - Use a structure to make globals in enough.c evident
  72 - Use a macro for the printf format of big_t in enough.c
  73 - Clean up code style in enough.c, update version
  74 - Use inline function instead of macro for index in enough.c
  75 - Clarify that prefix codes are counted in enough.c
  76 - Show all the codes for the maximum tables size in enough.c
  77 - Add gznorm.c example, which normalizes gzip files
  78 - Fix the zran.c example to work on a multiple-member gzip file
  79 - Add tables for crc32_combine(), to speed it up by a factor of 200
  80 - Add crc32_combine_gen() and crc32_combine_op() for fast combines
  81 - Speed up software CRC-32 computation by a factor of 1.5 to 3
  82 - Use atomic test and set, if available, for dynamic CRC tables
  83 - Don't bother computing check value after successful inflateSync()
  84 - Correct comment in crc32.c
  85 - Add use of the ARMv8 crc32 instructions when requested
  86 - Use ARM crc32 instructions if the ARM architecture has them
  87 - Explicitly note that the 32-bit check values are 32 bits
  88 - Avoid adding empty gzip member after gzflush with Z_FINISH
  89 - Fix memory leak on error in gzlog.c
  90 - Fix error in comment on the polynomial representation of a byte
  91 - Clarify gz* function interfaces, referring to parameter names
  92 - Change macro name in inflate.c to avoid collision in VxWorks
  93 - Correct typo in blast.c
  94 - Improve portability of contrib/minizip
  95 - Fix indentation in minizip's zip.c
  96 - Replace black/white with allow/block. (theresa-m)
  97 - minizip warning fix if MAXU32 already defined. (gvollant)
  98 - Fix unztell64() in minizip to work past 4GB. (Daniël Hörchner)
  99 - Clean up minizip to reduce warnings for testing
 100 - Add fallthrough comments for gcc
 101 - Eliminate use of ULL constants
 102 - Separate out address sanitizing from warnings in configure
 103 - Remove destructive aspects of make distclean
 104 - Check for cc masquerading as gcc or clang in configure
 105 - Fix crc32.c to compile local functions only if used
 106 
 107 Changes in 1.2.11 (15 Jan 2017)
 108 - Fix deflate stored bug when pulling last block from window
 109 - Permit immediate deflateParams changes before any deflate input
 110 
 111 Changes in 1.2.10 (2 Jan 2017)
 112 - Avoid warnings on snprintf() return value
 113 - Fix bug in deflate_stored() for zero-length input
 114 - Fix bug in gzwrite.c that produced corrupt gzip files
 115 - Remove files to be installed before copying them in Makefile.in
 116 - Add warnings when compiling with assembler code
 117 
 118 Changes in 1.2.9 (31 Dec 2016)
 119 - Fix contrib/minizip to permit unzipping with desktop API [Zouzou]
 120 - Improve contrib/blast to return unused bytes
 121 - Assure that gzoffset() is correct when appending
 122 - Improve compress() and uncompress() to support large lengths
 123 - Fix bug in test/example.c where error code not saved
 124 - Remedy Coverity warning [Randers-Pehrson]
 125 - Improve speed of gzprintf() in transparent mode
 126 - Fix inflateInit2() bug when windowBits is 16 or 32
 127 - Change DEBUG macro to ZLIB_DEBUG
 128 - Avoid uninitialized access by gzclose_w()
 129 - Allow building zlib outside of the source directory
 130 - Fix bug that accepted invalid zlib header when windowBits is zero
 131 - Fix gzseek() problem on MinGW due to buggy _lseeki64 there
 132 - Loop on write() calls in gzwrite.c in case of non-blocking I/O
 133 - Add --warn (-w) option to ./configure for more compiler warnings
 134 - Reject a window size of 256 bytes if not using the zlib wrapper
 135 - Fix bug when level 0 used with Z_HUFFMAN or Z_RLE
 136 - Add --debug (-d) option to ./configure to define ZLIB_DEBUG
 137 - Fix bugs in creating a very large gzip header
 138 - Add uncompress2() function, which returns the input size used
 139 - Assure that deflateParams() will not switch functions mid-block
 140 - Dramatically speed up deflation for level 0 (storing)
 141 - Add gzfread(), duplicating the interface of fread()
 142 - Add gzfwrite(), duplicating the interface of fwrite()
 143 - Add deflateGetDictionary() function
 144 - Use snprintf() for later versions of Microsoft C
 145 - Fix *Init macros to use z_ prefix when requested
 146 - Replace as400 with os400 for OS/400 support [Monnerat]
 147 - Add crc32_z() and adler32_z() functions with size_t lengths
 148 - Update Visual Studio project files [AraHaan]
 149 
 150 Changes in 1.2.8 (28 Apr 2013)
 151 - Update contrib/minizip/iowin32.c for Windows RT [Vollant]
 152 - Do not force Z_CONST for C++
 153 - Clean up contrib/vstudio [Roß]
 154 - Correct spelling error in zlib.h
 155 - Fix mixed line endings in contrib/vstudio
 156 
 157 Changes in 1.2.7.3 (13 Apr 2013)
 158 - Fix version numbers and DLL names in contrib/vstudio/*/zlib.rc
 159 
 160 Changes in 1.2.7.2 (13 Apr 2013)
 161 - Change check for a four-byte type back to hexadecimal
 162 - Fix typo in win32/Makefile.msc
 163 - Add casts in gzwrite.c for pointer differences
 164 
 165 Changes in 1.2.7.1 (24 Mar 2013)
 166 - Replace use of unsafe string functions with snprintf if available
 167 - Avoid including stddef.h on Windows for Z_SOLO compile [Niessink]
 168 - Fix gzgetc undefine when Z_PREFIX set [Turk]
 169 - Eliminate use of mktemp in Makefile (not always available)
 170 - Fix bug in 'F' mode for gzopen()
 171 - Add inflateGetDictionary() function
 172 - Correct comment in deflate.h
 173 - Use _snprintf for snprintf in Microsoft C
 174 - On Darwin, only use /usr/bin/libtool if libtool is not Apple
 175 - Delete "--version" file if created by "ar --version" [Richard G.]
 176 - Fix configure check for veracity of compiler error return codes
 177 - Fix CMake compilation of static lib for MSVC2010 x64
 178 - Remove unused variable in infback9.c
 179 - Fix argument checks in gzlog_compress() and gzlog_write()
 180 - Clean up the usage of z_const and respect const usage within zlib
 181 - Clean up examples/gzlog.[ch] comparisons of different types
 182 - Avoid shift equal to bits in type (caused endless loop)
 183 - Fix uninitialized value bug in gzputc() introduced by const patches
 184 - Fix memory allocation error in examples/zran.c [Nor]
 185 - Fix bug where gzopen(), gzclose() would write an empty file
 186 - Fix bug in gzclose() when gzwrite() runs out of memory
 187 - Check for input buffer malloc failure in examples/gzappend.c
 188 - Add note to contrib/blast to use binary mode in stdio
 189 - Fix comparisons of differently signed integers in contrib/blast
 190 - Check for invalid code length codes in contrib/puff
 191 - Fix serious but very rare decompression bug in inftrees.c
 192 - Update inflateBack() comments, since inflate() can be faster
 193 - Use underscored I/O function names for WINAPI_FAMILY
 194 - Add _tr_flush_bits to the external symbols prefixed by --zprefix
 195 - Add contrib/vstudio/vc10 pre-build step for static only
 196 - Quote --version-script argument in CMakeLists.txt
 197 - Don't specify --version-script on Apple platforms in CMakeLists.txt
 198 - Fix casting error in contrib/testzlib/testzlib.c
 199 - Fix types in contrib/minizip to match result of get_crc_table()
 200 - Simplify contrib/vstudio/vc10 with 'd' suffix
 201 - Add TOP support to win32/Makefile.msc
 202 - Support i686 and amd64 assembler builds in CMakeLists.txt
 203 - Fix typos in the use of _LARGEFILE64_SOURCE in zconf.h
 204 - Add vc11 and vc12 build files to contrib/vstudio
 205 - Add gzvprintf() as an undocumented function in zlib
 206 - Fix configure for Sun shell
 207 - Remove runtime check in configure for four-byte integer type
 208 - Add casts and consts to ease user conversion to C++
 209 - Add man pages for minizip and miniunzip
 210 - In Makefile uninstall, don't rm if preceding cd fails
 211 - Do not return Z_BUF_ERROR if deflateParam() has nothing to write
 212 
 213 Changes in 1.2.7 (2 May 2012)
 214 - Replace use of memmove() with a simple copy for portability
 215 - Test for existence of strerror
 216 - Restore gzgetc_ for backward compatibility with 1.2.6
 217 - Fix build with non-GNU make on Solaris
 218 - Require gcc 4.0 or later on Mac OS X to use the hidden attribute
 219 - Include unistd.h for Watcom C
 220 - Use __WATCOMC__ instead of __WATCOM__
 221 - Do not use the visibility attribute if NO_VIZ defined
 222 - Improve the detection of no hidden visibility attribute
 223 - Avoid using __int64 for gcc or solo compilation
 224 - Cast to char * in gzprintf to avoid warnings [Zinser]
 225 - Fix make_vms.com for VAX [Zinser]
 226 - Don't use library or built-in byte swaps
 227 - Simplify test and use of gcc hidden attribute
 228 - Fix bug in gzclose_w() when gzwrite() fails to allocate memory
 229 - Add "x" (O_EXCL) and "e" (O_CLOEXEC) modes support to gzopen()
 230 - Fix bug in test/minigzip.c for configure --solo
 231 - Fix contrib/vstudio project link errors [Mohanathas]
 232 - Add ability to choose the builder in make_vms.com [Schweda]
 233 - Add DESTDIR support to mingw32 win32/Makefile.gcc
 234 - Fix comments in win32/Makefile.gcc for proper usage
 235 - Allow overriding the default install locations for cmake
 236 - Generate and install the pkg-config file with cmake
 237 - Build both a static and a shared version of zlib with cmake
 238 - Include version symbols for cmake builds
 239 - If using cmake with MSVC, add the source directory to the includes
 240 - Remove unneeded EXTRA_CFLAGS from win32/Makefile.gcc [Truta]
 241 - Move obsolete emx makefile to old [Truta]
 242 - Allow the use of -Wundef when compiling or using zlib
 243 - Avoid the use of the -u option with mktemp
 244 - Improve inflate() documentation on the use of Z_FINISH
 245 - Recognize clang as gcc
 246 - Add gzopen_w() in Windows for wide character path names
 247 - Rename zconf.h in CMakeLists.txt to move it out of the way
 248 - Add source directory in CMakeLists.txt for building examples
 249 - Look in build directory for zlib.pc in CMakeLists.txt
 250 - Remove gzflags from zlibvc.def in vc9 and vc10
 251 - Fix contrib/minizip compilation in the MinGW environment
 252 - Update ./configure for Solaris, support --64 [Mooney]
 253 - Remove -R. from Solaris shared build (possible security issue)
 254 - Avoid race condition for parallel make (-j) running example
 255 - Fix type mismatch between get_crc_table() and crc_table
 256 - Fix parsing of version with "-" in CMakeLists.txt [Snider, Ziegler]
 257 - Fix the path to zlib.map in CMakeLists.txt
 258 - Force the native libtool in Mac OS X to avoid GNU libtool [Beebe]
 259 - Add instructions to win32/Makefile.gcc for shared install [Torri]
 260 
 261 Changes in 1.2.6.1 (12 Feb 2012)
 262 - Avoid the use of the Objective-C reserved name "id"
 263 - Include io.h in gzguts.h for Microsoft compilers
 264 - Fix problem with ./configure --prefix and gzgetc macro
 265 - Include gz_header definition when compiling zlib solo
 266 - Put gzflags() functionality back in zutil.c
 267 - Avoid library header include in crc32.c for Z_SOLO
 268 - Use name in GCC_CLASSIC as C compiler for coverage testing, if set
 269 - Minor cleanup in contrib/minizip/zip.c [Vollant]
 270 - Update make_vms.com [Zinser]
 271 - Remove unnecessary gzgetc_ function
 272 - Use optimized byte swap operations for Microsoft and GNU [Snyder]
 273 - Fix minor typo in zlib.h comments [Rzesniowiecki]
 274 
 275 Changes in 1.2.6 (29 Jan 2012)
 276 - Update the Pascal interface in contrib/pascal
 277 - Fix function numbers for gzgetc_ in zlibvc.def files
 278 - Fix configure.ac for contrib/minizip [Schiffer]
 279 - Fix large-entry detection in minizip on 64-bit systems [Schiffer]
 280 - Have ./configure use the compiler return code for error indication
 281 - Fix CMakeLists.txt for cross compilation [McClure]
 282 - Fix contrib/minizip/zip.c for 64-bit architectures [Dalsnes]
 283 - Fix compilation of contrib/minizip on FreeBSD [Marquez]
 284 - Correct suggested usages in win32/Makefile.msc [Shachar, Horvath]
 285 - Include io.h for Turbo C / Borland C on all platforms [Truta]
 286 - Make version explicit in contrib/minizip/configure.ac [Bosmans]
 287 - Avoid warning for no encryption in contrib/minizip/zip.c [Vollant]
 288 - Minor cleanup up contrib/minizip/unzip.c [Vollant]
 289 - Fix bug when compiling minizip with C++ [Vollant]
 290 - Protect for long name and extra fields in contrib/minizip [Vollant]
 291 - Avoid some warnings in contrib/minizip [Vollant]
 292 - Add -I../.. -L../.. to CFLAGS for minizip and miniunzip
 293 - Add missing libs to minizip linker command
 294 - Add support for VPATH builds in contrib/minizip
 295 - Add an --enable-demos option to contrib/minizip/configure
 296 - Add the generation of configure.log by ./configure
 297 - Exit when required parameters not provided to win32/Makefile.gcc
 298 - Have gzputc return the character written instead of the argument
 299 - Use the -m option on ldconfig for BSD systems [Tobias]
 300 - Correct in zlib.map when deflateResetKeep was added
 301 
 302 Changes in 1.2.5.3 (15 Jan 2012)
 303 - Restore gzgetc function for binary compatibility
 304 - Do not use _lseeki64 under Borland C++ [Truta]
 305 - Update win32/Makefile.msc to build test/*.c [Truta]
 306 - Remove old/visualc6 given CMakefile and other alternatives
 307 - Update AS400 build files and documentation [Monnerat]
 308 - Update win32/Makefile.gcc to build test/*.c [Truta]
 309 - Permit stronger flushes after Z_BLOCK flushes
 310 - Avoid extraneous empty blocks when doing empty flushes
 311 - Permit Z_NULL arguments to deflatePending
 312 - Allow deflatePrime() to insert bits in the middle of a stream
 313 - Remove second empty static block for Z_PARTIAL_FLUSH
 314 - Write out all of the available bits when using Z_BLOCK
 315 - Insert the first two strings in the hash table after a flush
 316 
 317 Changes in 1.2.5.2 (17 Dec 2011)
 318 - fix ld error: unable to find version dependency 'ZLIB_1.2.5'
 319 - use relative symlinks for shared libs
 320 - Avoid searching past window for Z_RLE strategy
 321 - Assure that high-water mark initialization is always applied in deflate
 322 - Add assertions to fill_window() in deflate.c to match comments
 323 - Update python link in README
 324 - Correct spelling error in gzread.c
 325 - Fix bug in gzgets() for a concatenated empty gzip stream
 326 - Correct error in comment for gz_make()
 327 - Change gzread() and related to ignore junk after gzip streams
 328 - Allow gzread() and related to continue after gzclearerr()
 329 - Allow gzrewind() and gzseek() after a premature end-of-file
 330 - Simplify gzseek() now that raw after gzip is ignored
 331 - Change gzgetc() to a macro for speed (~40% speedup in testing)
 332 - Fix gzclose() to return the actual error last encountered
 333 - Always add large file support for windows
 334 - Include zconf.h for windows large file support
 335 - Include zconf.h.cmakein for windows large file support
 336 - Update zconf.h.cmakein on make distclean
 337 - Merge vestigial vsnprintf determination from zutil.h to gzguts.h
 338 - Clarify how gzopen() appends in zlib.h comments
 339 - Correct documentation of gzdirect() since junk at end now ignored
 340 - Add a transparent write mode to gzopen() when 'T' is in the mode
 341 - Update python link in zlib man page
 342 - Get inffixed.h and MAKEFIXED result to match
 343 - Add a ./config --solo option to make zlib subset with no library use
 344 - Add undocumented inflateResetKeep() function for CAB file decoding
 345 - Add --cover option to ./configure for gcc coverage testing
 346 - Add #define ZLIB_CONST option to use const in the z_stream interface
 347 - Add comment to gzdopen() in zlib.h to use dup() when using fileno()
 348 - Note behavior of uncompress() to provide as much data as it can
 349 - Add files in contrib/minizip to aid in building libminizip
 350 - Split off AR options in Makefile.in and configure
 351 - Change ON macro to Z_ARG to avoid application conflicts
 352 - Facilitate compilation with Borland C++ for pragmas and vsnprintf
 353 - Include io.h for Turbo C / Borland C++
 354 - Move example.c and minigzip.c to test/
 355 - Simplify incomplete code table filling in inflate_table()
 356 - Remove code from inflate.c and infback.c that is impossible to execute
 357 - Test the inflate code with full coverage
 358 - Allow deflateSetDictionary, inflateSetDictionary at any time (in raw)
 359 - Add deflateResetKeep and fix inflateResetKeep to retain dictionary
 360 - Fix gzwrite.c to accommodate reduced memory zlib compilation
 361 - Have inflate() with Z_FINISH avoid the allocation of a window
 362 - Do not set strm->adler when doing raw inflate
 363 - Fix gzeof() to behave just like feof() when read is not past end of file
 364 - Fix bug in gzread.c when end-of-file is reached
 365 - Avoid use of Z_BUF_ERROR in gz* functions except for premature EOF
 366 - Document gzread() capability to read concurrently written files
 367 - Remove hard-coding of resource compiler in CMakeLists.txt [Blammo]
 368 
 369 Changes in 1.2.5.1 (10 Sep 2011)
 370 - Update FAQ entry on shared builds (#13)
 371 - Avoid symbolic argument to chmod in Makefile.in
 372 - Fix bug and add consts in contrib/puff [Oberhumer]
 373 - Update contrib/puff/zeros.raw test file to have all block types
 374 - Add full coverage test for puff in contrib/puff/Makefile
 375 - Fix static-only-build install in Makefile.in
 376 - Fix bug in unzGetCurrentFileInfo() in contrib/minizip [Kuno]
 377 - Add libz.a dependency to shared in Makefile.in for parallel builds
 378 - Spell out "number" (instead of "nb") in zlib.h for total_in, total_out
 379 - Replace $(...) with `...` in configure for non-bash sh [Bowler]
 380 - Add darwin* to Darwin* and solaris* to SunOS\ 5* in configure [Groffen]
 381 - Add solaris* to Linux* in configure to allow gcc use [Groffen]
 382 - Add *bsd* to Linux* case in configure [Bar-Lev]
 383 - Add inffast.obj to dependencies in win32/Makefile.msc
 384 - Correct spelling error in deflate.h [Kohler]
 385 - Change libzdll.a again to libz.dll.a (!) in win32/Makefile.gcc
 386 - Add test to configure for GNU C looking for gcc in output of $cc -v
 387 - Add zlib.pc generation to win32/Makefile.gcc [Weigelt]
 388 - Fix bug in zlib.h for _FILE_OFFSET_BITS set and _LARGEFILE64_SOURCE not
 389 - Add comment in zlib.h that adler32_combine with len2 < 0 makes no sense
 390 - Make NO_DIVIDE option in adler32.c much faster (thanks to John Reiser)
 391 - Make stronger test in zconf.h to include unistd.h for LFS
 392 - Apply Darwin patches for 64-bit file offsets to contrib/minizip [Slack]
 393 - Fix zlib.h LFS support when Z_PREFIX used
 394 - Add updated as400 support (removed from old) [Monnerat]
 395 - Avoid deflate sensitivity to volatile input data
 396 - Avoid division in adler32_combine for NO_DIVIDE
 397 - Clarify the use of Z_FINISH with deflateBound() amount of space
 398 - Set binary for output file in puff.c
 399 - Use u4 type for crc_table to avoid conversion warnings
 400 - Apply casts in zlib.h to avoid conversion warnings
 401 - Add OF to prototypes for adler32_combine_ and crc32_combine_ [Miller]
 402 - Improve inflateSync() documentation to note indeterminacy
 403 - Add deflatePending() function to return the amount of pending output
 404 - Correct the spelling of "specification" in FAQ [Randers-Pehrson]
 405 - Add a check in configure for stdarg.h, use for gzprintf()
 406 - Check that pointers fit in ints when gzprint() compiled old style
 407 - Add dummy name before $(SHAREDLIBV) in Makefile [Bar-Lev, Bowler]
 408 - Delete line in configure that adds -L. libz.a to LDFLAGS [Weigelt]
 409 - Add debug records in assembler code [Londer]
 410 - Update RFC references to use http://tools.ietf.org/html/... [Li]
 411 - Add --archs option, use of libtool to configure for Mac OS X [Borstel]
 412 
 413 Changes in 1.2.5 (19 Apr 2010)
 414 - Disable visibility attribute in win32/Makefile.gcc [Bar-Lev]
 415 - Default to libdir as sharedlibdir in configure [Nieder]
 416 - Update copyright dates on modified source files
 417 - Update trees.c to be able to generate modified trees.h
 418 - Exit configure for MinGW, suggesting win32/Makefile.gcc
 419 - Check for NULL path in gz_open [Homurlu]
 420 
 421 Changes in 1.2.4.5 (18 Apr 2010)
 422 - Set sharedlibdir in configure [Torok]
 423 - Set LDFLAGS in Makefile.in [Bar-Lev]
 424 - Avoid mkdir objs race condition in Makefile.in [Bowler]
 425 - Add ZLIB_INTERNAL in front of internal inter-module functions and arrays
 426 - Define ZLIB_INTERNAL to hide internal functions and arrays for GNU C
 427 - Don't use hidden attribute when it is a warning generator (e.g. Solaris)
 428 
 429 Changes in 1.2.4.4 (18 Apr 2010)
 430 - Fix CROSS_PREFIX executable testing, CHOST extract, mingw* [Torok]
 431 - Undefine _LARGEFILE64_SOURCE in zconf.h if it is zero, but not if empty
 432 - Try to use bash or ksh regardless of functionality of /bin/sh
 433 - Fix configure incompatibility with NetBSD sh
 434 - Remove attempt to run under bash or ksh since have better NetBSD fix
 435 - Fix win32/Makefile.gcc for MinGW [Bar-Lev]
 436 - Add diagnostic messages when using CROSS_PREFIX in configure
 437 - Added --sharedlibdir option to configure [Weigelt]
 438 - Use hidden visibility attribute when available [Frysinger]
 439 
 440 Changes in 1.2.4.3 (10 Apr 2010)
 441 - Only use CROSS_PREFIX in configure for ar and ranlib if they exist
 442 - Use CROSS_PREFIX for nm [Bar-Lev]
 443 - Assume _LARGEFILE64_SOURCE defined is equivalent to true
 444 - Avoid use of undefined symbols in #if with && and ||
 445 - Make *64 prototypes in gzguts.h consistent with functions
 446 - Add -shared load option for MinGW in configure [Bowler]
 447 - Move z_off64_t to public interface, use instead of off64_t
 448 - Remove ! from shell test in configure (not portable to Solaris)
 449 - Change +0 macro tests to -0 for possibly increased portability
 450 
 451 Changes in 1.2.4.2 (9 Apr 2010)
 452 - Add consistent carriage returns to readme.txt's in masmx86 and masmx64
 453 - Really provide prototypes for *64 functions when building without LFS
 454 - Only define unlink() in minigzip.c if unistd.h not included
 455 - Update README to point to contrib/vstudio project files
 456 - Move projects/vc6 to old/ and remove projects/
 457 - Include stdlib.h in minigzip.c for setmode() definition under WinCE
 458 - Clean up assembler builds in win32/Makefile.msc [Rowe]
 459 - Include sys/types.h for Microsoft for off_t definition
 460 - Fix memory leak on error in gz_open()
 461 - Symbolize nm as $NM in configure [Weigelt]
 462 - Use TEST_LDSHARED instead of LDSHARED to link test programs [Weigelt]
 463 - Add +0 to _FILE_OFFSET_BITS and _LFS64_LARGEFILE in case not defined
 464 - Fix bug in gzeof() to take into account unused input data
 465 - Avoid initialization of structures with variables in puff.c
 466 - Updated win32/README-WIN32.txt [Rowe]
 467 
 468 Changes in 1.2.4.1 (28 Mar 2010)
 469 - Remove the use of [a-z] constructs for sed in configure [gentoo 310225]
 470 - Remove $(SHAREDLIB) from LIBS in Makefile.in [Creech]
 471 - Restore "for debugging" comment on sprintf() in gzlib.c
 472 - Remove fdopen for MVS from gzguts.h
 473 - Put new README-WIN32.txt in win32 [Rowe]
 474 - Add check for shell to configure and invoke another shell if needed
 475 - Fix big fat stinking bug in gzseek() on uncompressed files
 476 - Remove vestigial F_OPEN64 define in zutil.h
 477 - Set and check the value of _LARGEFILE_SOURCE and _LARGEFILE64_SOURCE
 478 - Avoid errors on non-LFS systems when applications define LFS macros
 479 - Set EXE to ".exe" in configure for MINGW [Kahle]
 480 - Match crc32() in crc32.c exactly to the prototype in zlib.h [Sherrill]
 481 - Add prefix for cross-compilation in win32/makefile.gcc [Bar-Lev]
 482 - Add DLL install in win32/makefile.gcc [Bar-Lev]
 483 - Allow Linux* or linux* from uname in configure [Bar-Lev]
 484 - Allow ldconfig to be redefined in configure and Makefile.in [Bar-Lev]
 485 - Add cross-compilation prefixes to configure [Bar-Lev]
 486 - Match type exactly in gz_load() invocation in gzread.c
 487 - Match type exactly of zcalloc() in zutil.c to zlib.h alloc_func
 488 - Provide prototypes for *64 functions when building zlib without LFS
 489 - Don't use -lc when linking shared library on MinGW
 490 - Remove errno.h check in configure and vestigial errno code in zutil.h
 491 
 492 Changes in 1.2.4 (14 Mar 2010)
 493 - Fix VER3 extraction in configure for no fourth subversion
 494 - Update zlib.3, add docs to Makefile.in to make .pdf out of it
 495 - Add zlib.3.pdf to distribution
 496 - Don't set error code in gzerror() if passed pointer is NULL
 497 - Apply destination directory fixes to CMakeLists.txt [Lowman]
 498 - Move #cmakedefine's to a new zconf.in.cmakein
 499 - Restore zconf.h for builds that don't use configure or cmake
 500 - Add distclean to dummy Makefile for convenience
 501 - Update and improve INDEX, README, and FAQ
 502 - Update CMakeLists.txt for the return of zconf.h [Lowman]
 503 - Update contrib/vstudio/vc9 and vc10 [Vollant]
 504 - Change libz.dll.a back to libzdll.a in win32/Makefile.gcc
 505 - Apply license and readme changes to contrib/asm686 [Raiter]
 506 - Check file name lengths and add -c option in minigzip.c [Li]
 507 - Update contrib/amd64 and contrib/masmx86/ [Vollant]
 508 - Avoid use of "eof" parameter in trees.c to not shadow library variable
 509 - Update make_vms.com for removal of zlibdefs.h [Zinser]
 510 - Update assembler code and vstudio projects in contrib [Vollant]
 511 - Remove outdated assembler code contrib/masm686 and contrib/asm586
 512 - Remove old vc7 and vc8 from contrib/vstudio
 513 - Update win32/Makefile.msc, add ZLIB_VER_SUBREVISION [Rowe]
 514 - Fix memory leaks in gzclose_r() and gzclose_w(), file leak in gz_open()
 515 - Add contrib/gcc_gvmat64 for longest_match and inflate_fast [Vollant]
 516 - Remove *64 functions from win32/zlib.def (they're not 64-bit yet)
 517 - Fix bug in void-returning vsprintf() case in gzwrite.c
 518 - Fix name change from inflate.h in contrib/inflate86/inffas86.c
 519 - Check if temporary file exists before removing in make_vms.com [Zinser]
 520 - Fix make install and uninstall for --static option
 521 - Fix usage of _MSC_VER in gzguts.h and zutil.h [Truta]
 522 - Update readme.txt in contrib/masmx64 and masmx86 to assemble
 523 
 524 Changes in 1.2.3.9 (21 Feb 2010)
 525 - Expunge gzio.c
 526 - Move as400 build information to old
 527 - Fix updates in contrib/minizip and contrib/vstudio
 528 - Add const to vsnprintf test in configure to avoid warnings [Weigelt]
 529 - Delete zconf.h (made by configure) [Weigelt]
 530 - Change zconf.in.h to zconf.h.in per convention [Weigelt]
 531 - Check for NULL buf in gzgets()
 532 - Return empty string for gzgets() with len == 1 (like fgets())
 533 - Fix description of gzgets() in zlib.h for end-of-file, NULL return
 534 - Update minizip to 1.1 [Vollant]
 535 - Avoid MSVC loss of data warnings in gzread.c, gzwrite.c
 536 - Note in zlib.h that gzerror() should be used to distinguish from EOF
 537 - Remove use of snprintf() from gzlib.c
 538 - Fix bug in gzseek()
 539 - Update contrib/vstudio, adding vc9 and vc10 [Kuno, Vollant]
 540 - Fix zconf.h generation in CMakeLists.txt [Lowman]
 541 - Improve comments in zconf.h where modified by configure
 542 
 543 Changes in 1.2.3.8 (13 Feb 2010)
 544 - Clean up text files (tabs, trailing whitespace, etc.) [Oberhumer]
 545 - Use z_off64_t in gz_zero() and gz_skip() to match state->skip
 546 - Avoid comparison problem when sizeof(int) == sizeof(z_off64_t)
 547 - Revert to Makefile.in from 1.2.3.6 (live with the clutter)
 548 - Fix missing error return in gzflush(), add zlib.h note
 549 - Add *64 functions to zlib.map [Levin]
 550 - Fix signed/unsigned comparison in gz_comp()
 551 - Use SFLAGS when testing shared linking in configure
 552 - Add --64 option to ./configure to use -m64 with gcc
 553 - Fix ./configure --help to correctly name options
 554 - Have make fail if a test fails [Levin]
 555 - Avoid buffer overrun in contrib/masmx64/gvmat64.asm [Simpson]
 556 - Remove assembler object files from contrib
 557 
 558 Changes in 1.2.3.7 (24 Jan 2010)
 559 - Always gzopen() with O_LARGEFILE if available
 560 - Fix gzdirect() to work immediately after gzopen() or gzdopen()
 561 - Make gzdirect() more precise when the state changes while reading
 562 - Improve zlib.h documentation in many places
 563 - Catch memory allocation failure in gz_open()
 564 - Complete close operation if seek forward in gzclose_w() fails
 565 - Return Z_ERRNO from gzclose_r() if close() fails
 566 - Return Z_STREAM_ERROR instead of EOF for gzclose() being passed NULL
 567 - Return zero for gzwrite() errors to match zlib.h description
 568 - Return -1 on gzputs() error to match zlib.h description
 569 - Add zconf.in.h to allow recovery from configure modification [Weigelt]
 570 - Fix static library permissions in Makefile.in [Weigelt]
 571 - Avoid warnings in configure tests that hide functionality [Weigelt]
 572 - Add *BSD and DragonFly to Linux case in configure [gentoo 123571]
 573 - Change libzdll.a to libz.dll.a in win32/Makefile.gcc [gentoo 288212]
 574 - Avoid access of uninitialized data for first inflateReset2 call [Gomes]
 575 - Keep object files in subdirectories to reduce the clutter somewhat
 576 - Remove default Makefile and zlibdefs.h, add dummy Makefile
 577 - Add new external functions to Z_PREFIX, remove duplicates, z_z_ -> z_
 578 - Remove zlibdefs.h completely -- modify zconf.h instead
 579 
 580 Changes in 1.2.3.6 (17 Jan 2010)
 581 - Avoid void * arithmetic in gzread.c and gzwrite.c
 582 - Make compilers happier with const char * for gz_error message
 583 - Avoid unused parameter warning in inflate.c
 584 - Avoid signed-unsigned comparison warning in inflate.c
 585 - Indent #pragma's for traditional C
 586 - Fix usage of strwinerror() in glib.c, change to gz_strwinerror()
 587 - Correct email address in configure for system options
 588 - Update make_vms.com and add make_vms.com to contrib/minizip [Zinser]
 589 - Update zlib.map [Brown]
 590 - Fix Makefile.in for Solaris 10 make of example64 and minizip64 [Torok]
 591 - Apply various fixes to CMakeLists.txt [Lowman]
 592 - Add checks on len in gzread() and gzwrite()
 593 - Add error message for no more room for gzungetc()
 594 - Remove zlib version check in gzwrite()
 595 - Defer compression of gzprintf() result until need to
 596 - Use snprintf() in gzdopen() if available
 597 - Remove USE_MMAP configuration determination (only used by minigzip)
 598 - Remove examples/pigz.c (available separately)
 599 - Update examples/gun.c to 1.6
 600 
 601 Changes in 1.2.3.5 (8 Jan 2010)
 602 - Add space after #if in zutil.h for some compilers
 603 - Fix relatively harmless bug in deflate_fast() [Exarevsky]
 604 - Fix same problem in deflate_slow()
 605 - Add $(SHAREDLIBV) to LIBS in Makefile.in [Brown]
 606 - Add deflate_rle() for faster Z_RLE strategy run-length encoding
 607 - Add deflate_huff() for faster Z_HUFFMAN_ONLY encoding
 608 - Change name of "write" variable in inffast.c to avoid library collisions
 609 - Fix premature EOF from gzread() in gzio.c [Brown]
 610 - Use zlib header window size if windowBits is 0 in inflateInit2()
 611 - Remove compressBound() call in deflate.c to avoid linking compress.o
 612 - Replace use of errno in gz* with functions, support WinCE [Alves]
 613 - Provide alternative to perror() in minigzip.c for WinCE [Alves]
 614 - Don't use _vsnprintf on later versions of MSVC [Lowman]
 615 - Add CMake build script and input file [Lowman]
 616 - Update contrib/minizip to 1.1 [Svensson, Vollant]
 617 - Moved nintendods directory from contrib to root
 618 - Replace gzio.c with a new set of routines with the same functionality
 619 - Add gzbuffer(), gzoffset(), gzclose_r(), gzclose_w() as part of above
 620 - Update contrib/minizip to 1.1b
 621 - Change gzeof() to return 0 on error instead of -1 to agree with zlib.h
 622 
 623 Changes in 1.2.3.4 (21 Dec 2009)
 624 - Use old school .SUFFIXES in Makefile.in for FreeBSD compatibility
 625 - Update comments in configure and Makefile.in for default --shared
 626 - Fix test -z's in configure [Marquess]
 627 - Build examplesh and minigzipsh when not testing
 628 - Change NULL's to Z_NULL's in deflate.c and in comments in zlib.h
 629 - Import LDFLAGS from the environment in configure
 630 - Fix configure to populate SFLAGS with discovered CFLAGS options
 631 - Adapt make_vms.com to the new Makefile.in [Zinser]
 632 - Add zlib2ansi script for C++ compilation [Marquess]
 633 - Add _FILE_OFFSET_BITS=64 test to make test (when applicable)
 634 - Add AMD64 assembler code for longest match to contrib [Teterin]
 635 - Include options from $SFLAGS when doing $LDSHARED
 636 - Simplify 64-bit file support by introducing z_off64_t type
 637 - Make shared object files in objs directory to work around old Sun cc
 638 - Use only three-part version number for Darwin shared compiles
 639 - Add rc option to ar in Makefile.in for when ./configure not run
 640 - Add -WI,-rpath,. to LDFLAGS for OSF 1 V4*
 641 - Set LD_LIBRARYN32_PATH for SGI IRIX shared compile
 642 - Protect against _FILE_OFFSET_BITS being defined when compiling zlib
 643 - Rename Makefile.in targets allstatic to static and allshared to shared
 644 - Fix static and shared Makefile.in targets to be independent
 645 - Correct error return bug in gz_open() by setting state [Brown]
 646 - Put spaces before ;;'s in configure for better sh compatibility
 647 - Add pigz.c (parallel implementation of gzip) to examples/
 648 - Correct constant in crc32.c to UL [Leventhal]
 649 - Reject negative lengths in crc32_combine()
 650 - Add inflateReset2() function to work like inflateEnd()/inflateInit2()
 651 - Include sys/types.h for _LARGEFILE64_SOURCE [Brown]
 652 - Correct typo in doc/algorithm.txt [Janik]
 653 - Fix bug in adler32_combine() [Zhu]
 654 - Catch missing-end-of-block-code error in all inflates and in puff
 655     Assures that random input to inflate eventually results in an error
 656 - Added enough.c (calculation of ENOUGH for inftrees.h) to examples/
 657 - Update ENOUGH and its usage to reflect discovered bounds
 658 - Fix gzerror() error report on empty input file [Brown]
 659 - Add ush casts in trees.c to avoid pedantic runtime errors
 660 - Fix typo in zlib.h uncompress() description [Reiss]
 661 - Correct inflate() comments with regard to automatic header detection
 662 - Remove deprecation comment on Z_PARTIAL_FLUSH (it stays)
 663 - Put new version of gzlog (2.0) in examples with interruption recovery
 664 - Add puff compile option to permit invalid distance-too-far streams
 665 - Add puff TEST command options, ability to read piped input
 666 - Prototype the *64 functions in zlib.h when _FILE_OFFSET_BITS == 64, but
 667   _LARGEFILE64_SOURCE not defined
 668 - Fix Z_FULL_FLUSH to truly erase the past by resetting s->strstart
 669 - Fix deflateSetDictionary() to use all 32K for output consistency
 670 - Remove extraneous #define MIN_LOOKAHEAD in deflate.c (in deflate.h)
 671 - Clear bytes after deflate lookahead to avoid use of uninitialized data
 672 - Change a limit in inftrees.c to be more transparent to Coverity Prevent
 673 - Update win32/zlib.def with exported symbols from zlib.h
 674 - Correct spelling errors in zlib.h [Willem, Sobrado]
 675 - Allow Z_BLOCK for deflate() to force a new block
 676 - Allow negative bits in inflatePrime() to delete existing bit buffer
 677 - Add Z_TREES flush option to inflate() to return at end of trees
 678 - Add inflateMark() to return current state information for random access
 679 - Add Makefile for NintendoDS to contrib [Costa]
 680 - Add -w in configure compile tests to avoid spurious warnings [Beucler]
 681 - Fix typos in zlib.h comments for deflateSetDictionary()
 682 - Fix EOF detection in transparent gzread() [Maier]
 683 
 684 Changes in 1.2.3.3 (2 October 2006)
 685 - Make --shared the default for configure, add a --static option
 686 - Add compile option to permit invalid distance-too-far streams
 687 - Add inflateUndermine() function which is required to enable above
 688 - Remove use of "this" variable name for C++ compatibility [Marquess]
 689 - Add testing of shared library in make test, if shared library built
 690 - Use ftello() and fseeko() if available instead of ftell() and fseek()
 691 - Provide two versions of all functions that use the z_off_t type for
 692   binary compatibility -- a normal version and a 64-bit offset version,
 693   per the Large File Support Extension when _LARGEFILE64_SOURCE is
 694   defined; use the 64-bit versions by default when _FILE_OFFSET_BITS
 695   is defined to be 64
 696 - Add a --uname= option to configure to perhaps help with cross-compiling
 697 
 698 Changes in 1.2.3.2 (3 September 2006)
 699 - Turn off silly Borland warnings [Hay]
 700 - Use off64_t and define _LARGEFILE64_SOURCE when present
 701 - Fix missing dependency on inffixed.h in Makefile.in
 702 - Rig configure --shared to build both shared and static [Teredesai, Truta]
 703 - Remove zconf.in.h and instead create a new zlibdefs.h file
 704 - Fix contrib/minizip/unzip.c non-encrypted after encrypted [Vollant]
 705 - Add treebuild.xml (see http://treebuild.metux.de/) [Weigelt]
 706 
 707 Changes in 1.2.3.1 (16 August 2006)
 708 - Add watcom directory with OpenWatcom make files [Daniel]
 709 - Remove #undef of FAR in zconf.in.h for MVS [Fedtke]
 710 - Update make_vms.com [Zinser]
 711 - Use -fPIC for shared build in configure [Teredesai, Nicholson]
 712 - Use only major version number for libz.so on IRIX and OSF1 [Reinholdtsen]
 713 - Use fdopen() (not _fdopen()) for Interix in zutil.h [Bäck]
 714 - Add some FAQ entries about the contrib directory
 715 - Update the MVS question in the FAQ
 716 - Avoid extraneous reads after EOF in gzio.c [Brown]
 717 - Correct spelling of "successfully" in gzio.c [Randers-Pehrson]
 718 - Add comments to zlib.h about gzerror() usage [Brown]
 719 - Set extra flags in gzip header in gzopen() like deflate() does
 720 - Make configure options more compatible with double-dash conventions
 721   [Weigelt]
 722 - Clean up compilation under Solaris SunStudio cc [Rowe, Reinholdtsen]
 723 - Fix uninstall target in Makefile.in [Truta]
 724 - Add pkgconfig support [Weigelt]
 725 - Use $(DESTDIR) macro in Makefile.in [Reinholdtsen, Weigelt]
 726 - Replace set_data_type() with a more accurate detect_data_type() in
 727   trees.c, according to the txtvsbin.txt document [Truta]
 728 - Swap the order of #include <stdio.h> and #include "zlib.h" in
 729   gzio.c, example.c and minigzip.c [Truta]
 730 - Shut up annoying VS2005 warnings about standard C deprecation [Rowe,
 731   Truta] (where?)
 732 - Fix target "clean" from win32/Makefile.bor [Truta]
 733 - Create .pdb and .manifest files in win32/makefile.msc [Ziegler, Rowe]
 734 - Update zlib www home address in win32/DLL_FAQ.txt [Truta]
 735 - Update contrib/masmx86/inffas32.asm for VS2005 [Vollant, Van Wassenhove]
 736 - Enable browse info in the "Debug" and "ASM Debug" configurations in
 737   the Visual C++ 6 project, and set (non-ASM) "Debug" as default [Truta]
 738 - Add pkgconfig support [Weigelt]
 739 - Add ZLIB_VER_MAJOR, ZLIB_VER_MINOR and ZLIB_VER_REVISION in zlib.h,
 740   for use in win32/zlib1.rc [Polushin, Rowe, Truta]
 741 - Add a document that explains the new text detection scheme to
 742   doc/txtvsbin.txt [Truta]
 743 - Add rfc1950.txt, rfc1951.txt and rfc1952.txt to doc/ [Truta]
 744 - Move algorithm.txt into doc/ [Truta]
 745 - Synchronize FAQ with website
 746 - Fix compressBound(), was low for some pathological cases [Fearnley]
 747 - Take into account wrapper variations in deflateBound()
 748 - Set examples/zpipe.c input and output to binary mode for Windows
 749 - Update examples/zlib_how.html with new zpipe.c (also web site)
 750 - Fix some warnings in examples/gzlog.c and examples/zran.c (it seems
 751   that gcc became pickier in 4.0)
 752 - Add zlib.map for Linux: "All symbols from zlib-1.1.4 remain
 753   un-versioned, the patch adds versioning only for symbols introduced in
 754   zlib-1.2.0 or later.  It also declares as local those symbols which are
 755   not designed to be exported." [Levin]
 756 - Update Z_PREFIX list in zconf.in.h, add --zprefix option to configure
 757 - Do not initialize global static by default in trees.c, add a response
 758   NO_INIT_GLOBAL_POINTERS to initialize them if needed [Marquess]
 759 - Don't use strerror() in gzio.c under WinCE [Yakimov]
 760 - Don't use errno.h in zutil.h under WinCE [Yakimov]
 761 - Move arguments for AR to its usage to allow replacing ar [Marot]
 762 - Add HAVE_VISIBILITY_PRAGMA in zconf.in.h for Mozilla [Randers-Pehrson]
 763 - Improve inflateInit() and inflateInit2() documentation
 764 - Fix structure size comment in inflate.h
 765 - Change configure help option from --h* to --help [Santos]
 766 
 767 Changes in 1.2.3 (18 July 2005)
 768 - Apply security vulnerability fixes to contrib/infback9 as well
 769 - Clean up some text files (carriage returns, trailing space)
 770 - Update testzlib, vstudio, masmx64, and masmx86 in contrib [Vollant]
 771 
 772 Changes in 1.2.2.4 (11 July 2005)
 773 - Add inflatePrime() function for starting inflation at bit boundary
 774 - Avoid some Visual C warnings in deflate.c
 775 - Avoid more silly Visual C warnings in inflate.c and inftrees.c for 64-bit
 776   compile
 777 - Fix some spelling errors in comments [Betts]
 778 - Correct inflateInit2() error return documentation in zlib.h
 779 - Add zran.c example of compressed data random access to examples
 780   directory, shows use of inflatePrime()
 781 - Fix cast for assignments to strm->state in inflate.c and infback.c
 782 - Fix zlibCompileFlags() in zutil.c to use 1L for long shifts [Oberhumer]
 783 - Move declarations of gf2 functions to right place in crc32.c [Oberhumer]
 784 - Add cast in trees.c t avoid a warning [Oberhumer]
 785 - Avoid some warnings in fitblk.c, gun.c, gzjoin.c in examples [Oberhumer]
 786 - Update make_vms.com [Zinser]
 787 - Initialize state->write in inflateReset() since copied in inflate_fast()
 788 - Be more strict on incomplete code sets in inflate_table() and increase
 789   ENOUGH and MAXD -- this repairs a possible security vulnerability for
 790   invalid inflate input.  Thanks to Tavis Ormandy and Markus Oberhumer for
 791   discovering the vulnerability and providing test cases
 792 - Add ia64 support to configure for HP-UX [Smith]
 793 - Add error return to gzread() for format or i/o error [Levin]
 794 - Use malloc.h for OS/2 [Necasek]
 795 
 796 Changes in 1.2.2.3 (27 May 2005)
 797 - Replace 1U constants in inflate.c and inftrees.c for 64-bit compile
 798 - Typecast fread() return values in gzio.c [Vollant]
 799 - Remove trailing space in minigzip.c outmode (VC++ can't deal with it)
 800 - Fix crc check bug in gzread() after gzungetc() [Heiner]
 801 - Add the deflateTune() function to adjust internal compression parameters
 802 - Add a fast gzip decompressor, gun.c, to examples (use of inflateBack)
 803 - Remove an incorrect assertion in examples/zpipe.c
 804 - Add C++ wrapper in infback9.h [Donais]
 805 - Fix bug in inflateCopy() when decoding fixed codes
 806 - Note in zlib.h how much deflateSetDictionary() actually uses
 807 - Remove USE_DICT_HEAD in deflate.c (would mess up inflate if used)
 808 - Add _WIN32_WCE to define WIN32 in zconf.in.h [Spencer]
 809 - Don't include stderr.h or errno.h for _WIN32_WCE in zutil.h [Spencer]
 810 - Add gzdirect() function to indicate transparent reads
 811 - Update contrib/minizip [Vollant]
 812 - Fix compilation of deflate.c when both ASMV and FASTEST [Oberhumer]
 813 - Add casts in crc32.c to avoid warnings [Oberhumer]
 814 - Add contrib/masmx64 [Vollant]
 815 - Update contrib/asm586, asm686, masmx86, testzlib, vstudio [Vollant]
 816 
 817 Changes in 1.2.2.2 (30 December 2004)
 818 - Replace structure assignments in deflate.c and inflate.c with zmemcpy to
 819   avoid implicit memcpy calls (portability for no-library compilation)
 820 - Increase sprintf() buffer size in gzdopen() to allow for large numbers
 821 - Add INFLATE_STRICT to check distances against zlib header
 822 - Improve WinCE errno handling and comments [Chang]
 823 - Remove comment about no gzip header processing in FAQ
 824 - Add Z_FIXED strategy option to deflateInit2() to force fixed trees
 825 - Add updated make_vms.com [Coghlan], update README
 826 - Create a new "examples" directory, move gzappend.c there, add zpipe.c,
 827   fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html
 828 - Add FAQ entry and comments in deflate.c on uninitialized memory access
 829 - Add Solaris 9 make options in configure [Gilbert]
 830 - Allow strerror() usage in gzio.c for STDC
 831 - Fix DecompressBuf in contrib/delphi/ZLib.pas [ManChesTer]
 832 - Update contrib/masmx86/inffas32.asm and gvmat32.asm [Vollant]
 833 - Use z_off_t for adler32_combine() and crc32_combine() lengths
 834 - Make adler32() much faster for small len
 835 - Use OS_CODE in deflate() default gzip header
 836 
 837 Changes in 1.2.2.1 (31 October 2004)
 838 - Allow inflateSetDictionary() call for raw inflate
 839 - Fix inflate header crc check bug for file names and comments
 840 - Add deflateSetHeader() and gz_header structure for custom gzip headers
 841 - Add inflateGetheader() to retrieve gzip headers
 842 - Add crc32_combine() and adler32_combine() functions
 843 - Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
 844 - Use zstreamp consistently in zlib.h (inflate_back functions)
 845 - Remove GUNZIP condition from definition of inflate_mode in inflate.h
 846   and in contrib/inflate86/inffast.S [Truta, Anderson]
 847 - Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
 848 - Update projects/README.projects and projects/visualc6 [Truta]
 849 - Update win32/DLL_FAQ.txt [Truta]
 850 - Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
 851 - Deprecate Z_ASCII; use Z_TEXT instead [Truta]
 852 - Use a new algorithm for setting strm->data_type in trees.c [Truta]
 853 - Do not define an exit() prototype in zutil.c unless DEBUG defined
 854 - Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
 855 - Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
 856 - Fix Darwin build version identification [Peterson]
 857 
 858 Changes in 1.2.2 (3 October 2004)
 859 - Update zlib.h comments on gzip in-memory processing
 860 - Set adler to 1 in inflateReset() to support Java test suite [Walles]
 861 - Add contrib/dotzlib [Ravn]
 862 - Update win32/DLL_FAQ.txt [Truta]
 863 - Update contrib/minizip [Vollant]
 864 - Move contrib/visual-basic.txt to old/ [Truta]
 865 - Fix assembler builds in projects/visualc6/ [Truta]
 866 
 867 Changes in 1.2.1.2 (9 September 2004)
 868 - Update INDEX file
 869 - Fix trees.c to update strm->data_type (no one ever noticed!)
 870 - Fix bug in error case in inflate.c, infback.c, and infback9.c [Brown]
 871 - Add "volatile" to crc table flag declaration (for DYNAMIC_CRC_TABLE)
 872 - Add limited multitasking protection to DYNAMIC_CRC_TABLE
 873 - Add NO_vsnprintf for VMS in zutil.h [Mozilla]
 874 - Don't declare strerror() under VMS [Mozilla]
 875 - Add comment to DYNAMIC_CRC_TABLE to use get_crc_table() to initialize
 876 - Update contrib/ada [Anisimkov]
 877 - Update contrib/minizip [Vollant]
 878 - Fix configure to not hardcode directories for Darwin [Peterson]
 879 - Fix gzio.c to not return error on empty files [Brown]
 880 - Fix indentation; update version in contrib/delphi/ZLib.pas and
 881   contrib/pascal/zlibpas.pas [Truta]
 882 - Update mkasm.bat in contrib/masmx86 [Truta]
 883 - Update contrib/untgz [Truta]
 884 - Add projects/README.projects [Truta]
 885 - Add project for MS Visual C++ 6.0 in projects/visualc6 [Cadieux, Truta]
 886 - Update win32/DLL_FAQ.txt [Truta]
 887 - Update list of Z_PREFIX symbols in zconf.h [Randers-Pehrson, Truta]
 888 - Remove an unnecessary assignment to curr in inftrees.c [Truta]
 889 - Add OS/2 to exe builds in configure [Poltorak]
 890 - Remove err dummy parameter in zlib.h [Kientzle]
 891 
 892 Changes in 1.2.1.1 (9 January 2004)
 893 - Update email address in README
 894 - Several FAQ updates
 895 - Fix a big fat bug in inftrees.c that prevented decoding valid
 896   dynamic blocks with only literals and no distance codes --
 897   Thanks to "Hot Emu" for the bug report and sample file
 898 - Add a note to puff.c on no distance codes case
 899 
 900 Changes in 1.2.1 (17 November 2003)
 901 - Remove a tab in contrib/gzappend/gzappend.c
 902 - Update some interfaces in contrib for new zlib functions
 903 - Update zlib version number in some contrib entries
 904 - Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
 905 - Support shared libraries on Hurd and KFreeBSD [Brown]
 906 - Fix error in NO_DIVIDE option of adler32.c
 907 
 908 Changes in 1.2.0.8 (4 November 2003)
 909 - Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
 910 - Add experimental NO_DIVIDE #define in adler32.c
 911     - Possibly faster on some processors (let me know if it is)
 912 - Correct Z_BLOCK to not return on first inflate call if no wrap
 913 - Fix strm->data_type on inflate() return to correctly indicate EOB
 914 - Add deflatePrime() function for appending in the middle of a byte
 915 - Add contrib/gzappend for an example of appending to a stream
 916 - Update win32/DLL_FAQ.txt [Truta]
 917 - Delete Turbo C comment in README [Truta]
 918 - Improve some indentation in zconf.h [Truta]
 919 - Fix infinite loop on bad input in configure script [Church]
 920 - Fix gzeof() for concatenated gzip files [Johnson]
 921 - Add example to contrib/visual-basic.txt [Michael B.]
 922 - Add -p to mkdir's in Makefile.in [vda]
 923 - Fix configure to properly detect presence or lack of printf functions
 924 - Add AS400 support [Monnerat]
 925 - Add a little Cygwin support [Wilson]
 926 
 927 Changes in 1.2.0.7 (21 September 2003)
 928 - Correct some debug formats in contrib/infback9
 929 - Cast a type in a debug statement in trees.c
 930 - Change search and replace delimiter in configure from % to # [Beebe]
 931 - Update contrib/untgz to 0.2 with various fixes [Truta]
 932 - Add build support for Amiga [Nikl]
 933 - Remove some directories in old that have been updated to 1.2
 934 - Add dylib building for Mac OS X in configure and Makefile.in
 935 - Remove old distribution stuff from Makefile
 936 - Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
 937 - Update links in README
 938 
 939 Changes in 1.2.0.6 (13 September 2003)
 940 - Minor FAQ updates
 941 - Update contrib/minizip to 1.00 [Vollant]
 942 - Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
 943 - Update POSTINC comment for 68060 [Nikl]
 944 - Add contrib/infback9 with deflate64 decoding (unsupported)
 945 - For MVS define NO_vsnprintf and undefine FAR [van Burik]
 946 - Add pragma for fdopen on MVS [van Burik]
 947 
 948 Changes in 1.2.0.5 (8 September 2003)
 949 - Add OF to inflateBackEnd() declaration in zlib.h
 950 - Remember start when using gzdopen in the middle of a file
 951 - Use internal off_t counters in gz* functions to properly handle seeks
 952 - Perform more rigorous check for distance-too-far in inffast.c
 953 - Add Z_BLOCK flush option to return from inflate at block boundary
 954 - Set strm->data_type on return from inflate
 955     - Indicate bits unused, if at block boundary, and if in last block
 956 - Replace size_t with ptrdiff_t in crc32.c, and check for correct size
 957 - Add condition so old NO_DEFLATE define still works for compatibility
 958 - FAQ update regarding the Windows DLL [Truta]
 959 - INDEX update: add qnx entry, remove aix entry [Truta]
 960 - Install zlib.3 into mandir [Wilson]
 961 - Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
 962 - Adapt the zlib interface to the new DLL convention guidelines [Truta]
 963 - Introduce ZLIB_WINAPI macro to allow the export of functions using
 964   the WINAPI calling convention, for Visual Basic [Vollant, Truta]
 965 - Update msdos and win32 scripts and makefiles [Truta]
 966 - Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
 967 - Add contrib/ada [Anisimkov]
 968 - Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
 969 - Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
 970 - Add contrib/masm686 [Truta]
 971 - Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
 972   [Truta, Vollant]
 973 - Update contrib/delphi; rename to contrib/pascal; add example [Truta]
 974 - Remove contrib/delphi2; add a new contrib/delphi [Truta]
 975 - Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
 976   and fix some method prototypes [Truta]
 977 - Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
 978   [Truta]
 979 - Avoid the use of backslash (\) in contrib/minizip [Vollant]
 980 - Fix file time handling in contrib/untgz; update makefiles [Truta]
 981 - Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
 982   [Vollant]
 983 - Remove contrib/vstudio/vc15_16 [Vollant]
 984 - Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
 985 - Update README.contrib [Truta]
 986 - Invert the assignment order of match_head and s->prev[...] in
 987   INSERT_STRING [Truta]
 988 - Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
 989   [Truta]
 990 - Compare function pointers with 0, not with NULL or Z_NULL [Truta]
 991 - Fix prototype of syncsearch in inflate.c [Truta]
 992 - Introduce ASMINF macro to be enabled when using an ASM implementation
 993   of inflate_fast [Truta]
 994 - Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
 995 - Modify test_gzio in example.c to take a single file name as a
 996   parameter [Truta]
 997 - Exit the example.c program if gzopen fails [Truta]
 998 - Add type casts around strlen in example.c [Truta]
 999 - Remove casting to sizeof in minigzip.c; give a proper type
1000   to the variable compared with SUFFIX_LEN [Truta]
1001 - Update definitions of STDC and STDC99 in zconf.h [Truta]
1002 - Synchronize zconf.h with the new Windows DLL interface [Truta]
1003 - Use SYS16BIT instead of __32BIT__ to distinguish between
1004   16- and 32-bit platforms [Truta]
1005 - Use far memory allocators in small 16-bit memory models for
1006   Turbo C [Truta]
1007 - Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
1008   zlibCompileFlags [Truta]
1009 - Cygwin has vsnprintf [Wilson]
1010 - In Windows16, OS_CODE is 0, as in MSDOS [Truta]
1011 - In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
1012 
1013 Changes in 1.2.0.4 (10 August 2003)
1014 - Minor FAQ updates
1015 - Be more strict when checking inflateInit2's windowBits parameter
1016 - Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
1017 - Add gzip wrapper option to deflateInit2 using windowBits
1018 - Add updated QNX rule in configure and qnx directory [Bonnefoy]
1019 - Make inflate distance-too-far checks more rigorous
1020 - Clean up FAR usage in inflate
1021 - Add casting to sizeof() in gzio.c and minigzip.c
1022 
1023 Changes in 1.2.0.3 (19 July 2003)
1024 - Fix silly error in gzungetc() implementation [Vollant]
1025 - Update contrib/minizip and contrib/vstudio [Vollant]
1026 - Fix printf format in example.c
1027 - Correct cdecl support in zconf.in.h [Anisimkov]
1028 - Minor FAQ updates
1029 
1030 Changes in 1.2.0.2 (13 July 2003)
1031 - Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
1032 - Attempt to avoid warnings in crc32.c for pointer-int conversion
1033 - Add AIX to configure, remove aix directory [Bakker]
1034 - Add some casts to minigzip.c
1035 - Improve checking after insecure sprintf() or vsprintf() calls
1036 - Remove #elif's from crc32.c
1037 - Change leave label to inf_leave in inflate.c and infback.c to avoid
1038   library conflicts
1039 - Remove inflate gzip decoding by default--only enable gzip decoding by
1040   special request for stricter backward compatibility
1041 - Add zlibCompileFlags() function to return compilation information
1042 - More typecasting in deflate.c to avoid warnings
1043 - Remove leading underscore from _Capital #defines [Truta]
1044 - Fix configure to link shared library when testing
1045 - Add some Windows CE target adjustments [Mai]
1046 - Remove #define ZLIB_DLL in zconf.h [Vollant]
1047 - Add zlib.3 [Rodgers]
1048 - Update RFC URL in deflate.c and algorithm.txt [Mai]
1049 - Add zlib_dll_FAQ.txt to contrib [Truta]
1050 - Add UL to some constants [Truta]
1051 - Update minizip and vstudio [Vollant]
1052 - Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
1053 - Expand use of NO_DUMMY_DECL to avoid all dummy structures
1054 - Added iostream3 to contrib [Schwardt]
1055 - Replace rewind() with fseek() for WinCE [Truta]
1056 - Improve setting of zlib format compression level flags
1057     - Report 0 for huffman and rle strategies and for level == 0 or 1
1058     - Report 2 only for level == 6
1059 - Only deal with 64K limit when necessary at compile time [Truta]
1060 - Allow TOO_FAR check to be turned off at compile time [Truta]
1061 - Add gzclearerr() function [Souza]
1062 - Add gzungetc() function
1063 
1064 Changes in 1.2.0.1 (17 March 2003)
1065 - Add Z_RLE strategy for run-length encoding [Truta]
1066     - When Z_RLE requested, restrict matches to distance one
1067     - Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
1068 - Correct FASTEST compilation to allow level == 0
1069 - Clean up what gets compiled for FASTEST
1070 - Incorporate changes to zconf.in.h [Vollant]
1071     - Refine detection of Turbo C need for dummy returns
1072     - Refine ZLIB_DLL compilation
1073     - Include additional header file on VMS for off_t typedef
1074 - Try to use _vsnprintf where it supplants vsprintf [Vollant]
1075 - Add some casts in inffast.c
1076 - Enhance comments in zlib.h on what happens if gzprintf() tries to
1077   write more than 4095 bytes before compression
1078 - Remove unused state from inflateBackEnd()
1079 - Remove exit(0) from minigzip.c, example.c
1080 - Get rid of all those darn tabs
1081 - Add "check" target to Makefile.in that does the same thing as "test"
1082 - Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
1083 - Update contrib/inflate86 [Anderson]
1084 - Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
1085 - Add msdos and win32 directories with makefiles [Truta]
1086 - More additions and improvements to the FAQ
1087 
1088 Changes in 1.2.0 (9 March 2003)
1089 - New and improved inflate code
1090     - About 20% faster
1091     - Does not allocate 32K window unless and until needed
1092     - Automatically detects and decompresses gzip streams
1093     - Raw inflate no longer needs an extra dummy byte at end
1094     - Added inflateBack functions using a callback interface--even faster
1095       than inflate, useful for file utilities (gzip, zip)
1096     - Added inflateCopy() function to record state for random access on
1097       externally generated deflate streams (e.g. in gzip files)
1098     - More readable code (I hope)
1099 - New and improved crc32()
1100     - About 50% faster, thanks to suggestions from Rodney Brown
1101 - Add deflateBound() and compressBound() functions
1102 - Fix memory leak in deflateInit2()
1103 - Permit setting dictionary for raw deflate (for parallel deflate)
1104 - Fix const declaration for gzwrite()
1105 - Check for some malloc() failures in gzio.c
1106 - Fix bug in gzopen() on single-byte file 0x1f
1107 - Fix bug in gzread() on concatenated file with 0x1f at end of buffer
1108   and next buffer doesn't start with 0x8b
1109 - Fix uncompress() to return Z_DATA_ERROR on truncated input
1110 - Free memory at end of example.c
1111 - Remove MAX #define in trees.c (conflicted with some libraries)
1112 - Fix static const's in deflate.c, gzio.c, and zutil.[ch]
1113 - Declare malloc() and free() in gzio.c if STDC not defined
1114 - Use malloc() instead of calloc() in zutil.c if int big enough
1115 - Define STDC for AIX
1116 - Add aix/ with approach for compiling shared library on AIX
1117 - Add HP-UX support for shared libraries in configure
1118 - Add OpenUNIX support for shared libraries in configure
1119 - Use $cc instead of gcc to build shared library
1120 - Make prefix directory if needed when installing
1121 - Correct Macintosh avoidance of typedef Byte in zconf.h
1122 - Correct Turbo C memory allocation when under Linux
1123 - Use libz.a instead of -lz in Makefile (assure use of compiled library)
1124 - Update configure to check for snprintf or vsnprintf functions and their
1125   return value, warn during make if using an insecure function
1126 - Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
1127   is lost when library is used--resolution is to build new zconf.h
1128 - Documentation improvements (in zlib.h):
1129     - Document raw deflate and inflate
1130     - Update RFCs URL
1131     - Point out that zlib and gzip formats are different
1132     - Note that Z_BUF_ERROR is not fatal
1133     - Document string limit for gzprintf() and possible buffer overflow
1134     - Note requirement on avail_out when flushing
1135     - Note permitted values of flush parameter of inflate()
1136 - Add some FAQs (and even answers) to the FAQ
1137 - Add contrib/inflate86/ for x86 faster inflate
1138 - Add contrib/blast/ for PKWare Data Compression Library decompression
1139 - Add contrib/puff/ simple inflate for deflate format description
1140 
1141 Changes in 1.1.4 (11 March 2002)
1142 - ZFREE was repeated on same allocation on some error conditions
1143   This creates a security problem described in
1144   http://www.zlib.org/advisory-2002-03-11.txt
1145 - Returned incorrect error (Z_MEM_ERROR) on some invalid data
1146 - Avoid accesses before window for invalid distances with inflate window
1147   less than 32K
1148 - force windowBits > 8 to avoid a bug in the encoder for a window size
1149   of 256 bytes. (A complete fix will be available in 1.1.5)
1150 
1151 Changes in 1.1.3 (9 July 1998)
1152 - fix "an inflate input buffer bug that shows up on rare but persistent
1153   occasions" (Mark)
1154 - fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
1155 - fix gzseek(..., SEEK_SET) in write mode
1156 - fix crc check after a gzeek (Frank Faubert)
1157 - fix miniunzip when the last entry in a zip file is itself a zip file
1158   (J Lillge)
1159 - add contrib/asm586 and contrib/asm686 (Brian Raiter)
1160   See http://www.muppetlabs.com/~breadbox/software/assembly.html
1161 - add support for Delphi 3 in contrib/delphi (Bob Dellaca)
1162 - add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
1163 - do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
1164 - use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
1165 - added a FAQ file
1166 
1167 - Support gzdopen on Mac with Metrowerks (Jason Linhart)
1168 - Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
1169 - define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
1170 - avoid some warnings with Borland C (Tom Tanner)
1171 - fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
1172 - emulate utime() for WIN32 in contrib/untgz  (Gilles Vollant)
1173 - allow several arguments to configure (Tim Mooney, Frodo Looijaard)
1174 - use libdir and includedir in Makefile.in (Tim Mooney)
1175 - support shared libraries on OSF1 V4 (Tim Mooney)
1176 - remove so_locations in "make clean"  (Tim Mooney)
1177 - fix maketree.c compilation error (Glenn, Mark)
1178 - Python interface to zlib now in Python 1.5 (Jeremy Hylton)
1179 - new Makefile.riscos (Rich Walker)
1180 - initialize static descriptors in trees.c for embedded targets (Nick Smith)
1181 - use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
1182 - add the OS/2 files in Makefile.in too (Andrew Zabolotny)
1183 - fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
1184 - fix maketree.c to allow clean compilation of inffixed.h (Mark)
1185 - fix parameter check in deflateCopy (Gunther Nikl)
1186 - cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
1187 - Many portability patches by Christian Spieler:
1188   . zutil.c, zutil.h: added "const" for zmem*
1189   . Make_vms.com: fixed some typos
1190   . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
1191   . msdos/Makefile.msc: remove "default rtl link library" info from obj files
1192   . msdos/Makefile.*: use model-dependent name for the built zlib library
1193   . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
1194      new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
1195 - use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
1196 - replace __far with _far for better portability (Christian Spieler, Tom Lane)
1197 - fix test for errno.h in configure (Tim Newsham)
1198 
1199 Changes in 1.1.2 (19 March 98)
1200 - added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
1201   See http://www.winimage.com/zLibDll/unzip.html
1202 - preinitialize the inflate tables for fixed codes, to make the code
1203   completely thread safe (Mark)
1204 - some simplifications and slight speed-up to the inflate code (Mark)
1205 - fix gzeof on non-compressed files (Allan Schrum)
1206 - add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
1207 - use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
1208 - added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
1209 - add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
1210 - do not wrap extern "C" around system includes (Tom Lane)
1211 - mention zlib binding for TCL in README (Andreas Kupries)
1212 - added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
1213 - allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
1214 - allow "configure --prefix $HOME" (Tim Mooney)
1215 - remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
1216 - move Makefile.sas to amiga/Makefile.sas
1217 
1218 Changes in 1.1.1 (27 Feb 98)
1219 - fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
1220 - remove block truncation heuristic which had very marginal effect for zlib
1221   (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
1222   compression ratio on some files. This also allows inlining _tr_tally for
1223   matches in deflate_slow
1224 - added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
1225 
1226 Changes in 1.1.0 (24 Feb 98)
1227 - do not return STREAM_END prematurely in inflate (John Bowler)
1228 - revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
1229 - compile with -DFASTEST to get compression code optimized for speed only
1230 - in minigzip, try mmap'ing the input file first (Miguel Albrecht)
1231 - increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
1232   on Sun but significant on HP)
1233 
1234 - add a pointer to experimental unzip library in README (Gilles Vollant)
1235 - initialize variable gcc in configure (Chris Herborth)
1236 
1237 Changes in 1.0.9 (17 Feb 1998)
1238 - added gzputs and gzgets functions
1239 - do not clear eof flag in gzseek (Mark Diekhans)
1240 - fix gzseek for files in transparent mode (Mark Diekhans)
1241 - do not assume that vsprintf returns the number of bytes written (Jens Krinke)
1242 - replace EXPORT with ZEXPORT to avoid conflict with other programs
1243 - added compress2 in zconf.h, zlib.def, zlib.dnt
1244 - new asm code from Gilles Vollant in contrib/asm386
1245 - simplify the inflate code (Mark):
1246  . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
1247  . ZALLOC the length list in inflate_trees_fixed() instead of using stack
1248  . ZALLOC the value area for huft_build() instead of using stack
1249  . Simplify Z_FINISH check in inflate()
1250 
1251 - Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
1252 - in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
1253 - in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
1254   the declaration of FAR (Gilles Vollant)
1255 - install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
1256 - read_buf buf parameter of type Bytef* instead of charf*
1257 - zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
1258 - do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
1259 - fix check for presence of directories in "make install" (Ian Willis)
1260 
1261 Changes in 1.0.8 (27 Jan 1998)
1262 - fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
1263 - fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
1264 - added compress2() to allow setting the compression level
1265 - include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
1266 - use constant arrays for the static trees in trees.c instead of computing
1267   them at run time (thanks to Ken Raeburn for this suggestion). To create
1268   trees.h, compile with GEN_TREES_H and run "make test"
1269 - check return code of example in "make test" and display result
1270 - pass minigzip command line options to file_compress
1271 - simplifying code of inflateSync to avoid gcc 2.8 bug
1272 
1273 - support CC="gcc -Wall" in configure -s (QingLong)
1274 - avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
1275 - fix test for shared library support to avoid compiler warnings
1276 - zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
1277 - check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
1278 - do not use fdopen for Metrowerks on Mac (Brad Pettit))
1279 - add checks for gzputc and gzputc in example.c
1280 - avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
1281 - use const for the CRC table (Ken Raeburn)
1282 - fixed "make uninstall" for shared libraries
1283 - use Tracev instead of Trace in infblock.c
1284 - in example.c use correct compressed length for test_sync
1285 - suppress +vnocompatwarnings in configure for HPUX (not always supported)
1286 
1287 Changes in 1.0.7 (20 Jan 1998)
1288 - fix gzseek which was broken in write mode
1289 - return error for gzseek to negative absolute position
1290 - fix configure for Linux (Chun-Chung Chen)
1291 - increase stack space for MSC (Tim Wegner)
1292 - get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
1293 - define EXPORTVA for gzprintf (Gilles Vollant)
1294 - added man page zlib.3 (Rick Rodgers)
1295 - for contrib/untgz, fix makedir() and improve Makefile
1296 
1297 - check gzseek in write mode in example.c
1298 - allocate extra buffer for seeks only if gzseek is actually called
1299 - avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
1300 - add inflateSyncPoint in zconf.h
1301 - fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
1302 
1303 Changes in 1.0.6 (19 Jan 1998)
1304 - add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
1305   gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
1306 - Fix a deflate bug occurring only with compression level 0 (thanks to
1307   Andy Buckler for finding this one)
1308 - In minigzip, pass transparently also the first byte for .Z files
1309 - return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
1310 - check Z_FINISH in inflate (thanks to Marc Schluper)
1311 - Implement deflateCopy (thanks to Adam Costello)
1312 - make static libraries by default in configure, add --shared option
1313 - move MSDOS or Windows specific files to directory msdos
1314 - suppress the notion of partial flush to simplify the interface
1315   (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
1316 - suppress history buffer provided by application to simplify the interface
1317   (this feature was not implemented anyway in 1.0.4)
1318 - next_in and avail_in must be initialized before calling inflateInit or
1319   inflateInit2
1320 - add EXPORT in all exported functions (for Windows DLL)
1321 - added Makefile.nt (thanks to Stephen Williams)
1322 - added the unsupported "contrib" directory:
1323    contrib/asm386/ by Gilles Vollant <info@winimage.com>
1324         386 asm code replacing longest_match()
1325    contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
1326         A C++ I/O streams interface to the zlib gz* functions
1327    contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
1328         Another C++ I/O streams interface
1329    contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
1330         A very simple tar.gz file extractor using zlib
1331    contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
1332         How to use compress(), uncompress() and the gz* functions from VB
1333 - pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
1334   level) in minigzip (thanks to Tom Lane)
1335 
1336 - use const for rommable constants in deflate
1337 - added test for gzseek and gztell in example.c
1338 - add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
1339 - add undocumented function zError to convert error code to string
1340   (for Tim Smithers)
1341 - Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code
1342 - Use default memcpy for Symantec MSDOS compiler
1343 - Add EXPORT keyword for check_func (needed for Windows DLL)
1344 - add current directory to LD_LIBRARY_PATH for "make test"
1345 - create also a link for libz.so.1
1346 - added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
1347 - use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
1348 - added -soname for Linux in configure (Chun-Chung Chen,
1349 - assign numbers to the exported functions in zlib.def (for Windows DLL)
1350 - add advice in zlib.h for best usage of deflateSetDictionary
1351 - work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
1352 - allow compilation with ANSI keywords only enabled for TurboC in large model
1353 - avoid "versionString"[0] (Borland bug)
1354 - add NEED_DUMMY_RETURN for Borland
1355 - use variable z_verbose for tracing in debug mode (L. Peter Deutsch)
1356 - allow compilation with CC
1357 - defined STDC for OS/2 (David Charlap)
1358 - limit external names to 8 chars for MVS (Thomas Lund)
1359 - in minigzip.c, use static buffers only for 16-bit systems
1360 - fix suffix check for "minigzip -d foo.gz"
1361 - do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
1362 - use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
1363 - added makelcc.bat for lcc-win32 (Tom St Denis)
1364 - in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
1365 - Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion
1366 - check for unistd.h in configure (for off_t)
1367 - remove useless check parameter in inflate_blocks_free
1368 - avoid useless assignment of s->check to itself in inflate_blocks_new
1369 - do not flush twice in gzclose (thanks to Ken Raeburn)
1370 - rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
1371 - use NO_ERRNO_H instead of enumeration of operating systems with errno.h
1372 - work around buggy fclose on pipes for HP/UX
1373 - support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
1374 - fix configure if CC is already equal to gcc
1375 
1376 Changes in 1.0.5 (3 Jan 98)
1377 - Fix inflate to terminate gracefully when fed corrupted or invalid data
1378 - Use const for rommable constants in inflate
1379 - Eliminate memory leaks on error conditions in inflate
1380 - Removed some vestigial code in inflate
1381 - Update web address in README
1382 
1383 Changes in 1.0.4 (24 Jul 96)
1384 - In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
1385   bit, so the decompressor could decompress all the correct data but went
1386   on to attempt decompressing extra garbage data. This affected minigzip too
1387 - zlibVersion and gzerror return const char* (needed for DLL)
1388 - port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
1389 - use z_error only for DEBUG (avoid problem with DLLs)
1390 
1391 Changes in 1.0.3 (2 Jul 96)
1392 - use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
1393   small and medium models; this makes the library incompatible with previous
1394   versions for these models. (No effect in large model or on other systems.)
1395 - return OK instead of BUF_ERROR if previous deflate call returned with
1396   avail_out as zero but there is nothing to do
1397 - added memcmp for non STDC compilers
1398 - define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
1399 - define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
1400 - better check for 16-bit mode MSC (avoids problem with Symantec)
1401 
1402 Changes in 1.0.2 (23 May 96)
1403 - added Windows DLL support
1404 - added a function zlibVersion (for the DLL support)
1405 - fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
1406 - Bytef is define's instead of typedef'd only for Borland C
1407 - avoid reading uninitialized memory in example.c
1408 - mention in README that the zlib format is now RFC1950
1409 - updated Makefile.dj2
1410 - added algorithm.doc
1411 
1412 Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
1413 - fix array overlay in deflate.c which sometimes caused bad compressed data
1414 - fix inflate bug with empty stored block
1415 - fix MSDOS medium model which was broken in 0.99
1416 - fix deflateParams() which could generate bad compressed data
1417 - Bytef is define'd instead of typedef'ed (work around Borland bug)
1418 - added an INDEX file
1419 - new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
1420   Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
1421 - speed up adler32 for modern machines without auto-increment
1422 - added -ansi for IRIX in configure
1423 - static_init_done in trees.c is an int
1424 - define unlink as delete for VMS
1425 - fix configure for QNX
1426 - add configure branch for SCO and HPUX
1427 - avoid many warnings (unused variables, dead assignments, etc...)
1428 - no fdopen for BeOS
1429 - fix the Watcom fix for 32 bit mode (define FAR as empty)
1430 - removed redefinition of Byte for MKWERKS
1431 - work around an MWKERKS bug (incorrect merge of all .h files)
1432 
1433 Changes in 0.99 (27 Jan 96)
1434 - allow preset dictionary shared between compressor and decompressor
1435 - allow compression level 0 (no compression)
1436 - add deflateParams in zlib.h: allow dynamic change of compression level
1437   and compression strategy
1438 - test large buffers and deflateParams in example.c
1439 - add optional "configure" to build zlib as a shared library
1440 - suppress Makefile.qnx, use configure instead
1441 - fixed deflate for 64-bit systems (detected on Cray)
1442 - fixed inflate_blocks for 64-bit systems (detected on Alpha)
1443 - declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
1444 - always return Z_BUF_ERROR when deflate() has nothing to do
1445 - deflateInit and inflateInit are now macros to allow version checking
1446 - prefix all global functions and types with z_ with -DZ_PREFIX
1447 - make falloc completely reentrant (inftrees.c)
1448 - fixed very unlikely race condition in ct_static_init
1449 - free in reverse order of allocation to help memory manager
1450 - use zlib-1.0/* instead of zlib/* inside the tar.gz
1451 - make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
1452   -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
1453 - allow gzread on concatenated .gz files
1454 - deflateEnd now returns Z_DATA_ERROR if it was premature
1455 - deflate is finally (?) fully deterministic (no matches beyond end of input)
1456 - Document Z_SYNC_FLUSH
1457 - add uninstall in Makefile
1458 - Check for __cpluplus in zlib.h
1459 - Better test in ct_align for partial flush
1460 - avoid harmless warnings for Borland C++
1461 - initialize hash_head in deflate.c
1462 - avoid warning on fdopen (gzio.c) for HP cc -Aa
1463 - include stdlib.h for STDC compilers
1464 - include errno.h for Cray
1465 - ignore error if ranlib doesn't exist
1466 - call ranlib twice for NeXTSTEP
1467 - use exec_prefix instead of prefix for libz.a
1468 - renamed ct_* as _tr_* to avoid conflict with applications
1469 - clear z->msg in inflateInit2 before any error return
1470 - initialize opaque in example.c, gzio.c, deflate.c and inflate.c
1471 - fixed typo in zconf.h (_GNUC__ => __GNUC__)
1472 - check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
1473 - fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
1474 - in fcalloc, normalize pointer if size > 65520 bytes
1475 - don't use special fcalloc for 32 bit Borland C++
1476 - use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc.
1477 - use Z_BINARY instead of BINARY
1478 - document that gzclose after gzdopen will close the file
1479 - allow "a" as mode in gzopen
1480 - fix error checking in gzread
1481 - allow skipping .gz extra-field on pipes
1482 - added reference to Perl interface in README
1483 - put the crc table in FAR data (I dislike more and more the medium model :)
1484 - added get_crc_table
1485 - added a dimension to all arrays (Borland C can't count)
1486 - workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
1487 - guard against multiple inclusion of *.h (for precompiled header on Mac)
1488 - Watcom C pretends to be Microsoft C small model even in 32 bit mode
1489 - don't use unsized arrays to avoid silly warnings by Visual C++:
1490      warning C4746: 'inflate_mask' : unsized array treated as  '__far'
1491      (what's wrong with far data in far model?)
1492 - define enum out of inflate_blocks_state to allow compilation with C++
1493 
1494 Changes in 0.95 (16 Aug 95)
1495 - fix MSDOS small and medium model (now easier to adapt to any compiler)
1496 - inlined send_bits
1497 - fix the final (:-) bug for deflate with flush (output was correct but
1498   not completely flushed in rare occasions)
1499 - default window size is same for compression and decompression
1500   (it's now sufficient to set MAX_WBITS in zconf.h)
1501 - voidp -> voidpf and voidnp -> voidp (for consistency with other
1502   typedefs and because voidnp was not near in large model)
1503 
1504 Changes in 0.94 (13 Aug 95)
1505 - support MSDOS medium model
1506 - fix deflate with flush (could sometimes generate bad output)
1507 - fix deflateReset (zlib header was incorrectly suppressed)
1508 - added support for VMS
1509 - allow a compression level in gzopen()
1510 - gzflush now calls fflush
1511 - For deflate with flush, flush even if no more input is provided
1512 - rename libgz.a as libz.a
1513 - avoid complex expression in infcodes.c triggering Turbo C bug
1514 - work around a problem with gcc on Alpha (in INSERT_STRING)
1515 - don't use inline functions (problem with some gcc versions)
1516 - allow renaming of Byte, uInt, etc... with #define
1517 - avoid warning about (unused) pointer before start of array in deflate.c
1518 - avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
1519 - avoid reserved word 'new' in trees.c
1520 
1521 Changes in 0.93 (25 June 95)
1522 - temporarily disable inline functions
1523 - make deflate deterministic
1524 - give enough lookahead for PARTIAL_FLUSH
1525 - Set binary mode for stdin/stdout in minigzip.c for OS/2
1526 - don't even use signed char in inflate (not portable enough)
1527 - fix inflate memory leak for segmented architectures
1528 
1529 Changes in 0.92 (3 May 95)
1530 - don't assume that char is signed (problem on SGI)
1531 - Clear bit buffer when starting a stored block
1532 - no memcpy on Pyramid
1533 - suppressed inftest.c
1534 - optimized fill_window, put longest_match inline for gcc
1535 - optimized inflate on stored blocks
1536 - untabify all sources to simplify patches
1537 
1538 Changes in 0.91 (2 May 95)
1539 - Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
1540 - Document the memory requirements in zconf.h
1541 - added "make install"
1542 - fix sync search logic in inflateSync
1543 - deflate(Z_FULL_FLUSH) now works even if output buffer too short
1544 - after inflateSync, don't scare people with just "lo world"
1545 - added support for DJGPP
1546 
1547 Changes in 0.9 (1 May 95)
1548 - don't assume that zalloc clears the allocated memory (the TurboC bug
1549   was Mark's bug after all :)
1550 - let again gzread copy uncompressed data unchanged (was working in 0.71)
1551 - deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
1552 - added a test of inflateSync in example.c
1553 - moved MAX_WBITS to zconf.h because users might want to change that
1554 - document explicitly that zalloc(64K) on MSDOS must return a normalized
1555   pointer (zero offset)
1556 - added Makefiles for Microsoft C, Turbo C, Borland C++
1557 - faster crc32()
1558 
1559 Changes in 0.8 (29 April 95)
1560 - added fast inflate (inffast.c)
1561 - deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
1562   is incompatible with previous versions of zlib which returned Z_OK
1563 - work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
1564   (actually that was not a compiler bug, see 0.81 above)
1565 - gzread no longer reads one extra byte in certain cases
1566 - In gzio destroy(), don't reference a freed structure
1567 - avoid many warnings for MSDOS
1568 - avoid the ERROR symbol which is used by MS Windows
1569 
1570 Changes in 0.71 (14 April 95)
1571 - Fixed more MSDOS compilation problems :( There is still a bug with
1572   TurboC large model
1573 
1574 Changes in 0.7 (14 April 95)
1575 - Added full inflate support
1576 - Simplified the crc32() interface. The pre- and post-conditioning
1577   (one's complement) is now done inside crc32(). WARNING: this is
1578   incompatible with previous versions; see zlib.h for the new usage
1579 
1580 Changes in 0.61 (12 April 95)
1581 - workaround for a bug in TurboC. example and minigzip now work on MSDOS
1582 
1583 Changes in 0.6 (11 April 95)
1584 - added minigzip.c
1585 - added gzdopen to reopen a file descriptor as gzFile
1586 - added transparent reading of non-gziped files in gzread
1587 - fixed bug in gzread (don't read crc as data)
1588 - fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose)
1589 - don't allocate big arrays in the stack (for MSDOS)
1590 - fix some MSDOS compilation problems
1591 
1592 Changes in 0.5:
1593 - do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
1594   not yet Z_FULL_FLUSH
1595 - support decompression but only in a single step (forced Z_FINISH)
1596 - added opaque object for zalloc and zfree
1597 - added deflateReset and inflateReset
1598 - added a variable zlib_version for consistency checking
1599 - renamed the 'filter' parameter of deflateInit2 as 'strategy'
1600   Added Z_FILTERED and Z_HUFFMAN_ONLY constants
1601 
1602 Changes in 0.4:
1603 - avoid "zip" everywhere, use zlib instead of ziplib
1604 - suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
1605   if compression method == 8
1606 - added adler32 and crc32
1607 - renamed deflateOptions as deflateInit2, call one or the other but not both
1608 - added the method parameter for deflateInit2
1609 - added inflateInit2
1610 - simplified considerably deflateInit and inflateInit by not supporting
1611   user-provided history buffer. This is supported only in deflateInit2
1612   and inflateInit2
1613 
1614 Changes in 0.3:
1615 - prefix all macro names with Z_
1616 - use Z_FINISH instead of deflateEnd to finish compression
1617 - added Z_HUFFMAN_ONLY
1618 - added gzerror()