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![Giuseppe CONDORELLI](/assets/img/avatar_default.png)
This patch updates zlib to the latest stable version. Only relevant zlib parts were ported to u-boot tree, as already did for the current zlib (0.95). New zlib guarantees a faster inflate performances other then others improvements as explained at www.zlib.net. It also includes Alessandro Rubini's patches to allow 0 as destination pointer and to call watchdog reset if required by architecture. Signed-off-by: Giuseppe Condorelli <giuseppe.condorelli@st.com> Reviewed-by: Angelo Castello <angelo.castello@st.com> Reviewed-by: Alessandro Rubini <rubini-list@gnudd.com>
699 lines
25 KiB
C
699 lines
25 KiB
C
/*
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* This file is derived from zlib.h and zconf.h from the zlib-1.2.3
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* distribution by Jean-loup Gailly and Mark Adler, with some additions
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* by Paul Mackerras to aid in implementing Deflate compression and
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* decompression for PPP packets.
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*/
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/*
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* ==FILEVERSION 960122==
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*
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* This marker is used by the Linux installation script to determine
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* whether an up-to-date version of this file is already installed.
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*/
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/* zlib.h -- interface of the 'zlib' general purpose compression library
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version 1.2.3, July 18th, 2005
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Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jean-loup Gailly Mark Adler
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jloup@gzip.org madler@alumni.caltech.edu
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The data format used by the zlib library is described by RFCs (Request for
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Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
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(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
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*/
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#ifndef ZLIB_H
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#define ZLIB_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ZLIB_VERSION "1.2.3"
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#define ZLIB_VERNUM 0x1230
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/* #include "zconf.h" */ /* included directly here */
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/* zconf.h -- configuration of the zlib compression library
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* Copyright (C) 1995-2005 Jean-loup Gailly.
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* Begin of new zconf.h */
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/*
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* If you *really* need a unique prefix for all types and library functions,
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* compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
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*/
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#ifdef Z_PREFIX
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# define deflateInit_ z_deflateInit_
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# define deflate z_deflate
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# define deflateEnd z_deflateEnd
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# define inflateInit_ z_inflateInit_
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# define inflate z_inflate
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# define inflateEnd z_inflateEnd
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# define deflateInit2_ z_deflateInit2_
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# define deflateSetDictionary z_deflateSetDictionary
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# define deflateCopy z_deflateCopy
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# define deflateReset z_deflateReset
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# define deflateParams z_deflateParams
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# define deflateBound z_deflateBound
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# define deflatePrime z_deflatePrime
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# define inflateInit2_ z_inflateInit2_
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# define inflateSetDictionary z_inflateSetDictionary
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# define inflateSync z_inflateSync
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# define inflateSyncPoint z_inflateSyncPoint
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# define inflateCopy z_inflateCopy
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# define inflateReset z_inflateReset
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# define inflateBack z_inflateBack
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# define inflateBackEnd z_inflateBackEnd
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# define compress z_compress
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# define compress2 z_compress2
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# define compressBound z_compressBound
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# define uncompress z_uncompress
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# define adler32 z_adler32
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# define crc32 z_crc32
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# define get_crc_table z_get_crc_table
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# define zError z_zError
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# define alloc_func z_alloc_func
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# define free_func z_free_func
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# define in_func z_in_func
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# define out_func z_out_func
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# define Byte z_Byte
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# define uInt z_uInt
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# define uLong z_uLong
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# define Bytef z_Bytef
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# define charf z_charf
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# define intf z_intf
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# define uIntf z_uIntf
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# define uLongf z_uLongf
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# define voidpf z_voidpf
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# define voidp z_voidp
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#endif
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#if defined(__MSDOS__) && !defined(MSDOS)
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# define MSDOS
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#endif
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#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
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# define OS2
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#endif
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#if defined(_WINDOWS) && !defined(WINDOWS)
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# define WINDOWS
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#endif
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#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
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# ifndef WIN32
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# define WIN32
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# endif
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#endif
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#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
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# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
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# ifndef SYS16BIT
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# define SYS16BIT
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# endif
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# endif
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#endif
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/*
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* Compile with -DMAXSEG_64K if the alloc function cannot allocate more
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* than 64k bytes at a time (needed on systems with 16-bit int).
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*/
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#ifdef SYS16BIT
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# define MAXSEG_64K
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#endif
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#ifdef MSDOS
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# define UNALIGNED_OK
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#endif
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#ifdef __STDC_VERSION__
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# ifndef STDC
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# define STDC
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# endif
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# if __STDC_VERSION__ >= 199901L
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# ifndef STDC99
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# define STDC99
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# endif
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# endif
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#endif
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#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
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# define STDC
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#endif
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#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
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# define STDC
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#endif
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#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
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# define STDC
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#endif
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#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
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# define STDC
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#endif
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#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
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# define STDC
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#endif
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#ifndef STDC
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# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
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# define const /* note: need a more gentle solution here */
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# endif
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#endif
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/* Some Mac compilers merge all .h files incorrectly: */
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#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
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# define NO_DUMMY_DECL
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#endif
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/* Maximum value for memLevel in deflateInit2 */
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#ifndef MAX_MEM_LEVEL
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# ifdef MAXSEG_64K
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# define MAX_MEM_LEVEL 8
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# else
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# define MAX_MEM_LEVEL 9
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# endif
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#endif
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/* Maximum value for windowBits in deflateInit2 and inflateInit2.
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* WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
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* created by gzip. (Files created by minigzip can still be extracted by
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* gzip.)
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*/
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#ifndef MAX_WBITS
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# define MAX_WBITS 15 /* 32K LZ77 window */
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#endif
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/* The memory requirements for deflate are (in bytes):
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(1 << (windowBits+2)) + (1 << (memLevel+9))
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that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
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plus a few kilobytes for small objects. For example, if you want to reduce
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the default memory requirements from 256K to 128K, compile with
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make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
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Of course this will generally degrade compression (there's no free lunch).
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The memory requirements for inflate are (in bytes) 1 << windowBits
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that is, 32K for windowBits=15 (default value) plus a few kilobytes
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for small objects.
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*/
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/* Type declarations */
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#ifndef OF /* function prototypes */
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# ifdef STDC
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# define OF(args) args
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# else
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# define OF(args) ()
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# endif
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#endif
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/* The following definitions for FAR are needed only for MSDOS mixed
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* model programming (small or medium model with some far allocations).
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* This was tested only with MSC; for other MSDOS compilers you may have
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* to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
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* just define FAR to be empty.
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*/
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#ifdef SYS16BIT
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# if defined(M_I86SM) || defined(M_I86MM)
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/* MSC small or medium model */
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# define SMALL_MEDIUM
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# ifdef _MSC_VER
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# define FAR _far
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# else
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# define FAR far
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# endif
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# endif
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# if (defined(__SMALL__) || defined(__MEDIUM__))
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/* Turbo C small or medium model */
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# define SMALL_MEDIUM
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# ifdef __BORLANDC__
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# define FAR _far
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# else
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# define FAR far
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# endif
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# endif
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#endif
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#if defined(WINDOWS) || defined(WIN32)
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/* If building or using zlib as a DLL, define ZLIB_DLL.
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* This is not mandatory, but it offers a little performance increase.
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*/
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# ifdef ZLIB_DLL
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# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
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# ifdef ZLIB_INTERNAL
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# define ZEXTERN extern __declspec(dllexport)
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# else
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# define ZEXTERN extern __declspec(dllimport)
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# endif
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# endif
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# endif /* ZLIB_DLL */
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/* If building or using zlib with the WINAPI/WINAPIV calling convention,
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* define ZLIB_WINAPI.
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* Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
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*/
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# ifdef ZLIB_WINAPI
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# ifdef FAR
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# undef FAR
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# endif
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# include <windows.h>
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/* No need for _export, use ZLIB.DEF instead. */
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/* For complete Windows compatibility, use WINAPI, not __stdcall. */
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# define ZEXPORT WINAPI
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# ifdef WIN32
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# define ZEXPORTVA WINAPIV
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# else
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# define ZEXPORTVA FAR CDECL
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# endif
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# endif
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#endif
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#if defined (__BEOS__)
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# ifdef ZLIB_DLL
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# ifdef ZLIB_INTERNAL
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# define ZEXPORT __declspec(dllexport)
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# define ZEXPORTVA __declspec(dllexport)
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# else
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# define ZEXPORT __declspec(dllimport)
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# define ZEXPORTVA __declspec(dllimport)
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# endif
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# endif
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#endif
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#ifndef ZEXTERN
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# define ZEXTERN extern
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#endif
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#ifndef ZEXPORT
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# define ZEXPORT
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#endif
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#ifndef ZEXPORTVA
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# define ZEXPORTVA
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#endif
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#ifndef FAR
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# define FAR
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#endif
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#if !defined(__MACTYPES__)
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typedef unsigned char Byte; /* 8 bits */
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#endif
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typedef unsigned int uInt; /* 16 bits or more */
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typedef unsigned long uLong; /* 32 bits or more */
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#ifdef SMALL_MEDIUM
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/* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
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# define Bytef Byte FAR
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#else
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typedef Byte FAR Bytef;
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#endif
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typedef char FAR charf;
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typedef int FAR intf;
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typedef uInt FAR uIntf;
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typedef uLong FAR uLongf;
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#ifdef STDC
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typedef void const *voidpc;
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typedef void FAR *voidpf;
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typedef void *voidp;
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#else
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typedef Byte const *voidpc;
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typedef Byte FAR *voidpf;
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typedef Byte *voidp;
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#endif
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# ifdef VMS
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# include <unixio.h> /* for off_t */
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# endif
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# define z_off_t off_t
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#ifndef SEEK_SET
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# define SEEK_SET 0 /* Seek from beginning of file. */
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# define SEEK_CUR 1 /* Seek from current position. */
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# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
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#endif
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#ifndef z_off_t
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# define z_off_t long
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#endif
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#if defined(__OS400__)
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# define NO_vsnprintf
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#endif
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#if defined(__MVS__)
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# define NO_vsnprintf
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# ifdef FAR
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# undef FAR
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# endif
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#endif
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/* MVS linker does not support external names larger than 8 bytes */
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#if defined(__MVS__)
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# pragma map(deflateInit_,"DEIN")
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# pragma map(deflateInit2_,"DEIN2")
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# pragma map(deflateEnd,"DEEND")
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# pragma map(deflateBound,"DEBND")
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# pragma map(inflateInit_,"ININ")
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# pragma map(inflateInit2_,"ININ2")
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# pragma map(inflateEnd,"INEND")
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# pragma map(inflateSync,"INSY")
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# pragma map(inflateSetDictionary,"INSEDI")
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# pragma map(compressBound,"CMBND")
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# pragma map(inflate_table,"INTABL")
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# pragma map(inflate_fast,"INFA")
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# pragma map(inflate_copyright,"INCOPY")
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#endif
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/* End of new zconf.h */
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/*
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The 'zlib' compression library provides in-memory compression and
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decompression functions, including integrity checks of the uncompressed
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data. This version of the library supports only one compression method
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(deflation) but other algorithms will be added later and will have the same
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stream interface.
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Compression can be done in a single step if the buffers are large
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enough (for example if an input file is mmap'ed), or can be done by
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repeated calls of the compression function. In the latter case, the
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application must provide more input and/or consume the output
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(providing more output space) before each call.
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The compressed data format used by default by the in-memory functions is
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the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
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around a deflate stream, which is itself documented in RFC 1951.
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The library also supports reading and writing files in gzip (.gz) format
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with an interface similar to that of stdio using the functions that start
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with "gz". The gzip format is different from the zlib format. gzip is a
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gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
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This library can optionally read and write gzip streams in memory as well.
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The zlib format was designed to be compact and fast for use in memory
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and on communications channels. The gzip format was designed for single-
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file compression on file systems, has a larger header than zlib to maintain
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directory information, and uses a different, slower check method than zlib.
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The library does not install any signal handler. The decoder checks
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the consistency of the compressed data, so the library should never
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crash even in case of corrupted input.
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*/
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typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
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typedef void (*free_func) OF((voidpf opaque, voidpf address, uInt size));
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typedef void (*cb_func) OF((Bytef *buf, uInt len));
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struct internal_state;
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typedef struct z_stream_s {
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Bytef *next_in; /* next input byte */
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uInt avail_in; /* number of bytes available at next_in */
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uLong total_in; /* total nb of input bytes read so far */
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Bytef *next_out; /* next output byte should be put there */
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uInt avail_out; /* remaining free space at next_out */
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uLong total_out; /* total nb of bytes output so far */
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char *msg; /* last error message, NULL if no error */
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struct internal_state FAR *state; /* not visible by applications */
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alloc_func zalloc; /* used to allocate the internal state */
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free_func zfree; /* used to free the internal state */
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voidpf opaque; /* private data object passed to zalloc and zfree */
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int data_type; /* best guess about the data type:
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binary or text */
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cb_func outcb; /* called regularly just before blocks of output */
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uLong adler; /* adler32 value of the uncompressed data */
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uLong reserved; /* reserved for future use */
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} z_stream;
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typedef z_stream FAR *z_streamp;
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/*
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gzip header information passed to and from zlib routines. See RFC 1952
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for more details on the meanings of these fields.
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*/
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typedef struct gz_header_s {
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int text; /* true if compressed data believed to be text */
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uLong time; /* modification time */
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int xflags; /* extra flags (not used when writing a gzip file) */
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int os; /* operating system */
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Bytef *extra; /* pointer to extra field or Z_NULL if none */
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uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
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uInt extra_max; /* space at extra (only when reading header) */
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Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
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uInt name_max; /* space at name (only when reading header) */
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Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
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uInt comm_max; /* space at comment (only when reading header) */
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int hcrc; /* true if there was or will be a header crc */
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int done; /* true when done reading gzip header (not used
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when writing a gzip file) */
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} gz_header;
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typedef gz_header FAR *gz_headerp;
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/* constants */
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#define Z_NO_FLUSH 0
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#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
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#define Z_SYNC_FLUSH 2
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#define Z_FULL_FLUSH 3
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#define Z_FINISH 4
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#define Z_BLOCK 5
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/* Allowed flush values; see deflate() and inflate() below for details */
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#define Z_OK 0
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#define Z_STREAM_END 1
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#define Z_NEED_DICT 2
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#define Z_ERRNO (-1)
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#define Z_STREAM_ERROR (-2)
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#define Z_DATA_ERROR (-3)
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#define Z_MEM_ERROR (-4)
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#define Z_BUF_ERROR (-5)
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#define Z_VERSION_ERROR (-6)
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/* Return codes for the compression/decompression functions. Negative
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* values are errors, positive values are used for special but normal events.
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*/
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#define Z_NO_COMPRESSION 0
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#define Z_BEST_SPEED 1
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#define Z_BEST_COMPRESSION 9
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#define Z_DEFAULT_COMPRESSION (-1)
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/* compression levels */
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#define Z_FILTERED 1
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#define Z_HUFFMAN_ONLY 2
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#define Z_RLE 3
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#define Z_FIXED 4
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#define Z_DEFAULT_STRATEGY 0
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/* compression strategy; see deflateInit2() below for details */
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#define Z_BINARY 0
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#define Z_TEXT 1
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#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
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#define Z_UNKNOWN 2
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/* Possible values of the data_type field (though see inflate()) */
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#define Z_DEFLATED 8
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/* The deflate compression method (the only one supported in this version) */
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#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
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/* basic functions */
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/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
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If the first character differs, the library code actually used is
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not compatible with the zlib.h header file used by the application.
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This check is automatically made by deflateInit and inflateInit.
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*/
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ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, const char *version,
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int stream_size));
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ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
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/*
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inflate decompresses as much data as possible, and stops when the input
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buffer becomes empty or the output buffer becomes full. It may introduce
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some output latency (reading input without producing any output) except when
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forced to flush.
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The detailed semantics are as follows. inflate performs one or both of the
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following actions:
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- Decompress more input starting at next_in and update next_in and avail_in
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accordingly. If not all input can be processed (because there is not
|
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enough room in the output buffer), next_in is updated and processing
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will resume at this point for the next call of inflate().
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- Provide more output starting at next_out and update next_out and avail_out
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accordingly. inflate() provides as much output as possible, until there
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is no more input data or no more space in the output buffer (see below
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about the flush parameter).
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Before the call of inflate(), the application should ensure that at least
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one of the actions is possible, by providing more input and/or consuming
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more output, and updating the next_* and avail_* values accordingly.
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The application can consume the uncompressed output when it wants, for
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example when the output buffer is full (avail_out == 0), or after each
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call of inflate(). If inflate returns Z_OK and with zero avail_out, it
|
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must be called again after making room in the output buffer because there
|
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might be more output pending.
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The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
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Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
|
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output as possible to the output buffer. Z_BLOCK requests that inflate() stop
|
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if and when it gets to the next deflate block boundary. When decoding the
|
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zlib or gzip format, this will cause inflate() to return immediately after
|
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the header and before the first block. When doing a raw inflate, inflate()
|
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will go ahead and process the first block, and will return when it gets to
|
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the end of that block, or when it runs out of data.
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The Z_BLOCK option assists in appending to or combining deflate streams.
|
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Also to assist in this, on return inflate() will set strm->data_type to the
|
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number of unused bits in the last byte taken from strm->next_in, plus 64
|
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if inflate() is currently decoding the last block in the deflate stream,
|
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plus 128 if inflate() returned immediately after decoding an end-of-block
|
|
code or decoding the complete header up to just before the first byte of the
|
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deflate stream. The end-of-block will not be indicated until all of the
|
|
uncompressed data from that block has been written to strm->next_out. The
|
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number of unused bits may in general be greater than seven, except when
|
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bit 7 of data_type is set, in which case the number of unused bits will be
|
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less than eight.
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inflate() should normally be called until it returns Z_STREAM_END or an
|
|
error. However if all decompression is to be performed in a single step
|
|
(a single call of inflate), the parameter flush should be set to
|
|
Z_FINISH. In this case all pending input is processed and all pending
|
|
output is flushed; avail_out must be large enough to hold all the
|
|
uncompressed data. (The size of the uncompressed data may have been saved
|
|
by the compressor for this purpose.) The next operation on this stream must
|
|
be inflateEnd to deallocate the decompression state. The use of Z_FINISH
|
|
is never required, but can be used to inform inflate that a faster approach
|
|
may be used for the single inflate() call.
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|
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In this implementation, inflate() always flushes as much output as
|
|
possible to the output buffer, and always uses the faster approach on the
|
|
first call. So the only effect of the flush parameter in this implementation
|
|
is on the return value of inflate(), as noted below, or when it returns early
|
|
because Z_BLOCK is used.
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|
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If a preset dictionary is needed after this call (see inflateSetDictionary
|
|
below), inflate sets strm->adler to the adler32 checksum of the dictionary
|
|
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
|
|
strm->adler to the adler32 checksum of all output produced so far (that is,
|
|
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
|
|
below. At the end of the stream, inflate() checks that its computed adler32
|
|
checksum is equal to that saved by the compressor and returns Z_STREAM_END
|
|
only if the checksum is correct.
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|
|
inflate() will decompress and check either zlib-wrapped or gzip-wrapped
|
|
deflate data. The header type is detected automatically. Any information
|
|
contained in the gzip header is not retained, so applications that need that
|
|
information should instead use raw inflate, see inflateInit2() below, or
|
|
inflateBack() and perform their own processing of the gzip header and
|
|
trailer.
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|
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inflate() returns Z_OK if some progress has been made (more input processed
|
|
or more output produced), Z_STREAM_END if the end of the compressed data has
|
|
been reached and all uncompressed output has been produced, Z_NEED_DICT if a
|
|
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
|
|
corrupted (input stream not conforming to the zlib format or incorrect check
|
|
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
|
|
if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
|
|
Z_BUF_ERROR if no progress is possible or if there was not enough room in the
|
|
output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
|
|
inflate() can be called again with more input and more output space to
|
|
continue decompressing. If Z_DATA_ERROR is returned, the application may then
|
|
call inflateSync() to look for a good compression block if a partial recovery
|
|
of the data is desired.
|
|
*/
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|
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ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
|
|
/*
|
|
All dynamically allocated data structures for this stream are freed.
|
|
This function discards any unprocessed input and does not flush any
|
|
pending output.
|
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|
|
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
|
|
was inconsistent. In the error case, msg may be set but then points to a
|
|
static string (which must not be deallocated).
|
|
*/
|
|
|
|
/* Advanced functions */
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|
|
|
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
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|
|
/* utility functions */
|
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|
|
/*
|
|
The following utility functions are implemented on top of the
|
|
basic stream-oriented functions. To simplify the interface, some
|
|
default options are assumed (compression level and memory usage,
|
|
standard memory allocation functions). The source code of these
|
|
utility functions can easily be modified if you need special options.
|
|
*/
|
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|
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ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
|
|
/*
|
|
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
|
|
return the updated checksum. If buf is NULL, this function returns
|
|
the required initial value for the checksum.
|
|
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
|
|
much faster. Usage example:
|
|
|
|
uLong adler = adler32(0L, Z_NULL, 0);
|
|
|
|
while (read_buffer(buffer, length) != EOF) {
|
|
adler = adler32(adler, buffer, length);
|
|
}
|
|
if (adler != original_adler) error();
|
|
*/
|
|
|
|
/*
|
|
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
|
|
and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
|
|
each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
|
|
seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
|
|
*/
|
|
|
|
ZEXTERN uInt ZEXPORT crc32 OF((uInt crc, const Bytef *buf, uInt len));
|
|
/*
|
|
Update a running CRC-32 with the bytes buf[0..len-1] and return the
|
|
updated CRC-32. If buf is NULL, this function returns the required initial
|
|
value for the for the crc. Pre- and post-conditioning (one's complement) is
|
|
performed within this function so it shouldn't be done by the application.
|
|
Usage example:
|
|
|
|
uLong crc = crc32(0L, Z_NULL, 0);
|
|
|
|
while (read_buffer(buffer, length) != EOF) {
|
|
crc = crc32(crc, buffer, length);
|
|
}
|
|
if (crc != original_crc) error();
|
|
*/
|
|
|
|
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
|
|
const char *version, int stream_size));
|
|
#define inflateInit(strm) \
|
|
inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
|
|
#define inflateInit2(strm, windowBits) \
|
|
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
|
|
|
|
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
|
|
struct internal_state {int dummy;}; /* hack for buggy compilers */
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* ZLIB_H */
|