mirror of
https://github.com/opnsense/src.git
synced 2026-06-08 16:22:46 -04:00
Update kernel parts of ppp to ppp-2.3.3. Not much has changed except
that the deflate components use zlib 1.0.4 instead of zlib 0.95.
This commit is contained in:
Peter Wemm
parent
ca0166b07b
commit
52403fe6de
3 changed files with 1963 additions and 856 deletions
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@ -1,4 +1,4 @@
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/* $Id: ppp_deflate.c,v 1.5 1997/09/21 22:31:20 dyson Exp $ */
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/* $Id: ppp_deflate.c,v 1.6 1997/10/28 15:58:32 bde Exp $ */
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/*
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* ppp_deflate.c - interface the zlib procedures for Deflate compression
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@ -60,7 +60,7 @@ struct deflate_state {
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#define DEFLATE_OVHD 2 /* Deflate overhead/packet */
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static void *z_alloc __P((void *, u_int items, u_int size));
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static void z_free __P((void *, void *ptr, u_int nb));
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static void z_free __P((void *, void *ptr));
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static void *z_comp_alloc __P((u_char *options, int opt_len));
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static void *z_decomp_alloc __P((u_char *options, int opt_len));
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static void z_comp_free __P((void *state));
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@ -113,10 +113,9 @@ z_alloc(notused, items, size)
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}
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void
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z_free(notused, ptr, nbytes)
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z_free(notused, ptr)
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void *notused;
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void *ptr;
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u_int nbytes;
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{
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FREE(ptr, M_DEVBUF);
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}
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@ -148,10 +147,9 @@ z_comp_alloc(options, opt_len)
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state->strm.next_in = NULL;
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state->strm.zalloc = z_alloc;
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state->strm.zalloc_init = z_alloc;
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state->strm.zfree = z_free;
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if (deflateInit2(&state->strm, Z_DEFAULT_COMPRESSION, DEFLATE_METHOD_VAL,
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-w_size, 8, Z_DEFAULT_STRATEGY, DEFLATE_OVHD+2) != Z_OK) {
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-w_size, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
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FREE(state, M_DEVBUF);
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return NULL;
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}
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@ -380,7 +378,6 @@ z_decomp_alloc(options, opt_len)
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state->strm.next_out = NULL;
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state->strm.zalloc = z_alloc;
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state->strm.zalloc_init = z_alloc;
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state->strm.zfree = z_free;
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if (inflateInit2(&state->strm, -w_size) != Z_OK) {
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FREE(state, M_DEVBUF);
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2176
sys/net/zlib.c
2176
sys/net/zlib.c
File diff suppressed because it is too large
Load diff
632
sys/net/zlib.h
632
sys/net/zlib.h
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@ -1,23 +1,25 @@
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/* $Id: zlib.h,v 1.1.2.1 1997/07/01 20:44:10 peter Exp $ */
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/* $Id: zlib.h,v 1.3 1997/08/19 14:10:50 peter Exp $ */
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/*
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* This file is derived from zlib.h and zconf.h from the zlib-0.95
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* This file is derived from zlib.h and zconf.h from the zlib-1.0.4
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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 970501==
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* ==FILEVERSION 971127==
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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 0.95, Aug 16th, 1995.
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Copyright (C) 1995 Jean-loup Gailly and Mark Adler
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/* +++ zlib.h */
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/* zlib.h -- interface of the 'zlib' general purpose compression library
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version 1.0.4, Jul 24th, 1996.
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Copyright (C) 1995-1996 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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@ -37,43 +39,109 @@
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Jean-loup Gailly Mark Adler
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gzip@prep.ai.mit.edu madler@alumni.caltech.edu
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*/
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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 ftp://ds.internic.net/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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/* #include "zconf.h" */ /* included directly here */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* +++ zconf.h */
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/* zconf.h -- configuration of the zlib compression library
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* Copyright (C) 1995 Jean-loup Gailly.
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* Copyright (C) 1995-1996 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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/* From: zconf.h,v 1.12 1995/05/03 17:27:12 jloup Exp */
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/* From: zconf.h,v 1.20 1996/07/02 15:09:28 me Exp $ */
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#ifndef _ZCONF_H
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#define _ZCONF_H
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/*
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The library does not install any signal handler. It is recommended to
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add at least a handler for SIGSEGV when decompressing; the library checks
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the consistency of the input data whenever possible but may go nuts
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for some forms of corrupted input.
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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 inflateInit2_ z_inflateInit2_
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# define inflateSetDictionary z_inflateSetDictionary
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# define inflateSync z_inflateSync
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# define inflateReset z_inflateReset
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# define compress z_compress
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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 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(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
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# define WIN32
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#endif
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#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
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# ifndef __32BIT__
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# define __32BIT__
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# endif
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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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/*
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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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* Compile with -DUNALIGNED_OK if it is OK to access shorts or ints
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* at addresses which are not a multiple of their size.
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* Under DOS, -DFAR=far or -DFAR=__far may be needed.
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*/
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#if defined(MSDOS) && !defined(__32BIT__)
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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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#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32)) && !defined(STDC)
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# define STDC
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#endif
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#if (defined(__STDC__) || defined(__cplusplus)) && !defined(STDC)
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# define STDC
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#endif
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#ifndef STDC
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# if defined(MSDOS) || defined(__STDC__) || defined(__cplusplus)
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# define STDC
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# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
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# define const
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# endif
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#endif
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#ifdef __MWERKS__ /* Metrowerks CodeWarrior declares fileno() in unix.h */
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# include <unix.h>
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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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@ -85,10 +153,6 @@
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# endif
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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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/* Maximum value for windowBits in deflateInit2 and inflateInit2 */
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#ifndef MAX_WBITS
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# define MAX_WBITS 15 /* 32K LZ77 window */
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@ -117,14 +181,44 @@
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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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#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__)
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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(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
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# ifndef __32BIT__
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# define SMALL_MEDIUM
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# define FAR __far
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# endif
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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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typedef unsigned char Byte; /* 8 bits */
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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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typedef Byte FAR Bytef;
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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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#if defined(__BORLANDC__) && defined(SMALL_MEDIUM)
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/* Borland C/C++ ignores 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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@ -135,9 +229,19 @@ typedef uLong FAR uLongf;
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typedef Byte *voidp;
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#endif
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/* end of original zconf.h */
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#define ZLIB_VERSION "0.95P"
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/* Compile with -DZLIB_DLL for Windows DLL support */
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#if (defined(_WINDOWS) || defined(WINDOWS)) && defined(ZLIB_DLL)
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# include <windows.h>
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# define EXPORT WINAPI
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#else
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# define EXPORT
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#endif
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#endif /* _ZCONF_H */
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/* --- zconf.h */
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#define ZLIB_VERSION "1.0.4P"
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/*
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The 'zlib' compression library provides in-memory compression and
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@ -156,10 +260,15 @@ typedef uLong FAR uLongf;
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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 library does not install any signal handler. It is recommended to
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add at least a handler for SIGSEGV when decompressing; the library checks
|
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the consistency of the input data whenever possible but may go nuts
|
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for some forms 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 nbytes));
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typedef void (*free_func) OF((voidpf opaque, voidpf address));
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struct internal_state;
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@ -176,14 +285,16 @@ typedef struct z_stream_s {
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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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alloc_func zalloc_init; /* used to allocate the internal state during initialization */
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free_func zfree; /* used to free the internal state */
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voidp opaque; /* private data object passed to zalloc and zfree */
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Byte data_type; /* best guess about the data type: ascii or binary */
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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: ascii or binary */
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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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The application must update next_in and avail_in when avail_in has
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dropped to zero. It must update next_out and avail_out when avail_out
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@ -217,21 +328,26 @@ typedef struct z_stream_s {
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#define Z_NO_FLUSH 0
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#define Z_PARTIAL_FLUSH 1
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#define Z_FULL_FLUSH 2
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#define Z_SYNC_FLUSH 3 /* experimental: partial_flush + byte align */
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#define Z_FINISH 4
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#define Z_PACKET_FLUSH 5
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/* See deflate() below for the usage of these constants */
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#define Z_PACKET_FLUSH 2
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#define Z_SYNC_FLUSH 3
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#define Z_FULL_FLUSH 4
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#define Z_FINISH 5
|
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/* Allowed flush values; see deflate() 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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/* error codes for the compression/decompression functions */
|
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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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|
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@ -240,42 +356,54 @@ typedef struct z_stream_s {
|
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#define Z_FILTERED 1
|
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#define Z_HUFFMAN_ONLY 2
|
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#define Z_DEFAULT_STRATEGY 0
|
||||
/* compression strategy; see deflateInit2() below for details */
|
||||
|
||||
#define Z_BINARY 0
|
||||
#define Z_ASCII 1
|
||||
#define Z_UNKNOWN 2
|
||||
/* Used to set the data_type field */
|
||||
/* Possible values of the data_type field */
|
||||
|
||||
#define Z_DEFLATED 8
|
||||
/* The deflate compression method (the only one supported in this version) */
|
||||
|
||||
#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
|
||||
|
||||
extern char *zlib_version;
|
||||
/* The application can compare zlib_version and ZLIB_VERSION for consistency.
|
||||
If the first character differs, the library code actually used is
|
||||
not compatible with the zlib.h header file used by the application.
|
||||
*/
|
||||
#define zlib_version zlibVersion()
|
||||
/* for compatibility with versions < 1.0.2 */
|
||||
|
||||
/* basic functions */
|
||||
|
||||
extern int deflateInit OF((z_stream *strm, int level));
|
||||
extern const char * EXPORT zlibVersion OF((void));
|
||||
/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
|
||||
If the first character differs, the library code actually used is
|
||||
not compatible with the zlib.h header file used by the application.
|
||||
This check is automatically made by deflateInit and inflateInit.
|
||||
*/
|
||||
|
||||
/*
|
||||
extern int EXPORT deflateInit OF((z_streamp strm, int level));
|
||||
|
||||
Initializes the internal stream state for compression. The fields
|
||||
zalloc, zfree and opaque must be initialized before by the caller.
|
||||
If zalloc and zfree are set to Z_NULL, deflateInit updates them to
|
||||
use default allocation functions.
|
||||
|
||||
The compression level must be Z_DEFAULT_COMPRESSION, or between 1 and 9:
|
||||
1 gives best speed, 9 gives best compression. Z_DEFAULT_COMPRESSION requests
|
||||
a default compromise between speed and compression (currently equivalent
|
||||
to level 6).
|
||||
The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
|
||||
1 gives best speed, 9 gives best compression, 0 gives no compression at
|
||||
all (the input data is simply copied a block at a time).
|
||||
Z_DEFAULT_COMPRESSION requests a default compromise between speed and
|
||||
compression (currently equivalent to level 6).
|
||||
|
||||
deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_STREAM_ERROR if level is not a valid compression level.
|
||||
enough memory, Z_STREAM_ERROR if level is not a valid compression level,
|
||||
Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
|
||||
with the version assumed by the caller (ZLIB_VERSION).
|
||||
msg is set to null if there is no error message. deflateInit does not
|
||||
perform any compression: this will be done by deflate().
|
||||
*/
|
||||
|
||||
|
||||
extern int deflate OF((z_stream *strm, int flush));
|
||||
extern int EXPORT deflate OF((z_streamp strm, int flush));
|
||||
/*
|
||||
Performs one or both of the following actions:
|
||||
|
||||
|
|
@ -295,13 +423,20 @@ extern int deflate OF((z_stream *strm, int flush));
|
|||
more output, and updating avail_in or avail_out accordingly; avail_out
|
||||
should never be zero before the call. The application can consume the
|
||||
compressed output when it wants, for example when the output buffer is full
|
||||
(avail_out == 0), or after each call of deflate().
|
||||
(avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
|
||||
and with zero avail_out, it must be called again after making room in the
|
||||
output buffer because there might be more output pending.
|
||||
|
||||
If the parameter flush is set to Z_PARTIAL_FLUSH, the current compression
|
||||
block is terminated and flushed to the output buffer so that the
|
||||
decompressor can get all input data available so far. For method 9, a future
|
||||
variant on method 8, the current block will be flushed but not terminated.
|
||||
If flush is set to Z_FULL_FLUSH, the compression block is terminated, a
|
||||
Z_SYNC_FLUSH has the same effect as partial flush except that the compressed
|
||||
output is byte aligned (the compressor can clear its internal bit buffer)
|
||||
and the current block is always terminated; this can be useful if the
|
||||
compressor has to be restarted from scratch after an interruption (in which
|
||||
case the internal state of the compressor may be lost).
|
||||
If flush is set to Z_FULL_FLUSH, the compression block is terminated, a
|
||||
special marker is output and the compression dictionary is discarded; this
|
||||
is useful to allow the decompressor to synchronize if one compressed block
|
||||
has been damaged (see inflateSync below). Flushing degrades compression and
|
||||
|
|
@ -316,18 +451,9 @@ extern int deflate OF((z_stream *strm, int flush));
|
|||
omitting the length bytes (the effect of this is that the 3-bit type
|
||||
code 000 for a stored block is output, and the output is then
|
||||
byte-aligned). This is designed for use at the end of a PPP packet.
|
||||
In addition, if the current compression block contains all the data
|
||||
since the last Z_PACKET_FLUSH, it is never output as a stored block.
|
||||
If the current compression block output as a static or dynamic block
|
||||
would not be at least `minCompression' bytes smaller than the
|
||||
original data, then nothing is output for that block. (The type
|
||||
code for the zero-length stored block is still output, resulting in
|
||||
a single zero byte being output for the whole packet.)
|
||||
`MinCompression' is a parameter to deflateInit2, or 0 if deflateInit
|
||||
is used.
|
||||
|
||||
If the parameter flush is set to Z_FINISH, all pending input is processed,
|
||||
all pending output is flushed and deflate returns with Z_STREAM_END if there
|
||||
If the parameter flush is set to Z_FINISH, pending input is processed,
|
||||
pending output is flushed and deflate returns with Z_STREAM_END if there
|
||||
was enough output space; if deflate returns with Z_OK, this function must be
|
||||
called again with Z_FINISH and more output space (updated avail_out) but no
|
||||
more input data, until it returns with Z_STREAM_END or an error. After
|
||||
|
|
@ -352,37 +478,40 @@ extern int deflate OF((z_stream *strm, int flush));
|
|||
*/
|
||||
|
||||
|
||||
extern int deflateEnd OF((z_stream *strm));
|
||||
extern int EXPORT deflateEnd 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.
|
||||
|
||||
deflateEnd 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).
|
||||
stream state was inconsistent, Z_DATA_ERROR if the stream was freed
|
||||
prematurely (some input or output was discarded). In the error case,
|
||||
msg may be set but then points to a static string (which must not be
|
||||
deallocated).
|
||||
*/
|
||||
|
||||
|
||||
extern int inflateInit OF((z_stream *strm));
|
||||
/*
|
||||
extern int EXPORT inflateInit OF((z_streamp strm));
|
||||
|
||||
Initializes the internal stream state for decompression. The fields
|
||||
zalloc and zfree must be initialized before by the caller. If zalloc and
|
||||
zfree are set to Z_NULL, inflateInit updates them to use default allocation
|
||||
functions.
|
||||
zalloc, zfree and opaque must be initialized before by the caller. If
|
||||
zalloc and zfree are set to Z_NULL, inflateInit updates them to use default
|
||||
allocation functions.
|
||||
|
||||
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory. msg is set to null if there is no error message.
|
||||
inflateInit does not perform any decompression: this will be done by
|
||||
inflate().
|
||||
enough memory, Z_VERSION_ERROR if the zlib library version is incompatible
|
||||
with the version assumed by the caller. msg is set to null if there is no
|
||||
error message. inflateInit does not perform any decompression: this will be
|
||||
done by inflate().
|
||||
*/
|
||||
|
||||
|
||||
#if defined(__FreeBSD__) && (defined(KERNEL) || defined(_KERNEL))
|
||||
#define inflate inflate_ppp /* FreeBSD already has an inflate :-( */
|
||||
#define inflate inflate_ppp /* FreeBSD already has an inflate :-( */
|
||||
#endif
|
||||
|
||||
extern int inflate OF((z_stream *strm, int flush));
|
||||
extern int EXPORT inflate OF((z_streamp strm, int flush));
|
||||
/*
|
||||
Performs one or both of the following actions:
|
||||
|
||||
|
|
@ -392,15 +521,18 @@ extern int inflate OF((z_stream *strm, int flush));
|
|||
will resume at this point for the next call of inflate().
|
||||
|
||||
- Provide more output starting at next_out and update next_out and avail_out
|
||||
accordingly. inflate() always provides as much output as possible
|
||||
(until there is no more input data or no more space in the output buffer).
|
||||
accordingly. inflate() provides as much output as possible, until there
|
||||
is no more input data or no more space in the output buffer (see below
|
||||
about the flush parameter).
|
||||
|
||||
Before the call of inflate(), the application should ensure that at least
|
||||
one of the actions is possible, by providing more input and/or consuming
|
||||
more output, and updating the next_* and avail_* values accordingly.
|
||||
The application can consume the uncompressed output when it wants, for
|
||||
example when the output buffer is full (avail_out == 0), or after each
|
||||
call of inflate().
|
||||
call of inflate(). If inflate returns Z_OK and with zero avail_out, it
|
||||
must be called again after making room in the output buffer because there
|
||||
might be more output pending.
|
||||
|
||||
If the parameter flush is set to Z_PARTIAL_FLUSH or Z_PACKET_FLUSH,
|
||||
inflate flushes as much output as possible to the output buffer. The
|
||||
|
|
@ -425,15 +557,19 @@ extern int inflate OF((z_stream *strm, int flush));
|
|||
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_DATA_ERROR if the input data was corrupted, 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. In the Z_DATA_ERROR case, the application may then
|
||||
call inflateSync to look for a good compression block. */
|
||||
produced, Z_NEED_DICT if a preset dictionary is needed at this point (see
|
||||
inflateSetDictionary below), Z_DATA_ERROR if the input data was corrupted,
|
||||
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. In the Z_DATA_ERROR case, the
|
||||
application may then call inflateSync to look for a good compression block.
|
||||
In the Z_NEED_DICT case, strm->adler is set to the Adler32 value of the
|
||||
dictionary chosen by the compressor.
|
||||
*/
|
||||
|
||||
|
||||
extern int inflateEnd OF((z_stream *strm));
|
||||
extern int EXPORT 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
|
||||
|
|
@ -444,25 +580,26 @@ extern int inflateEnd OF((z_stream *strm));
|
|||
static string (which must not be deallocated).
|
||||
*/
|
||||
|
||||
/* advanced functions */
|
||||
/* Advanced functions */
|
||||
|
||||
/*
|
||||
The following functions are needed only in some special applications.
|
||||
*/
|
||||
|
||||
extern int deflateInit2 OF((z_stream *strm,
|
||||
int level,
|
||||
int method,
|
||||
int windowBits,
|
||||
int memLevel,
|
||||
int strategy,
|
||||
int minCompression));
|
||||
/*
|
||||
This is another version of deflateInit with more compression options. The
|
||||
fields next_in, zalloc and zfree must be initialized before by the caller.
|
||||
extern int EXPORT deflateInit2 OF((z_streamp strm,
|
||||
int level,
|
||||
int method,
|
||||
int windowBits,
|
||||
int memLevel,
|
||||
int strategy));
|
||||
|
||||
The method parameter is the compression method. It must be 8 in this
|
||||
version of the library. (Method 9 will allow a 64K history buffer and
|
||||
This is another version of deflateInit with more compression options. The
|
||||
fields next_in, zalloc, zfree and opaque must be initialized before by
|
||||
the caller.
|
||||
|
||||
The method parameter is the compression method. It must be Z_DEFLATED in
|
||||
this version of the library. (Method 9 will allow a 64K history buffer and
|
||||
partial block flushes.)
|
||||
|
||||
The windowBits parameter is the base two logarithm of the window size
|
||||
|
|
@ -471,24 +608,22 @@ extern int deflateInit2 OF((z_stream *strm,
|
|||
values of this parameter result in better compression at the expense of
|
||||
memory usage. The default value is 15 if deflateInit is used instead.
|
||||
|
||||
The memLevel parameter specifies how much memory should be allocated
|
||||
The memLevel parameter specifies how much memory should be allocated
|
||||
for the internal compression state. memLevel=1 uses minimum memory but
|
||||
is slow and reduces compression ratio; memLevel=9 uses maximum memory
|
||||
for optimal speed. The default value is 8. See zconf.h for total memory
|
||||
usage as a function of windowBits and memLevel.
|
||||
|
||||
The strategy parameter is used to tune the compression algorithm. Use
|
||||
the value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data
|
||||
produced by a filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman
|
||||
encoding only (no string match). Filtered data consists mostly of small
|
||||
values with a somewhat random distribution. In this case, the
|
||||
compression algorithm is tuned to compress them better. The strategy
|
||||
parameter only affects the compression ratio but not the correctness of
|
||||
the compressed output even if it is not set appropriately.
|
||||
|
||||
The minCompression parameter specifies the minimum reduction in size
|
||||
required for a compressed block to be output when Z_PACKET_FLUSH is
|
||||
used (see the description of deflate above).
|
||||
The strategy parameter is used to tune the compression algorithm. Use the
|
||||
value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
|
||||
filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no
|
||||
string match). Filtered data consists mostly of small values with a
|
||||
somewhat random distribution. In this case, the compression algorithm is
|
||||
tuned to compress them better. The effect of Z_FILTERED is to force more
|
||||
Huffman coding and less string matching; it is somewhat intermediate
|
||||
between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects
|
||||
the compression ratio but not the correctness of the compressed output even
|
||||
if it is not set appropriately.
|
||||
|
||||
If next_in is not null, the library will use this buffer to hold also
|
||||
some history information; the buffer must either hold the entire input
|
||||
|
|
@ -507,11 +642,40 @@ extern int deflateInit2 OF((z_stream *strm,
|
|||
not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as
|
||||
an invalid method). msg is set to null if there is no error message.
|
||||
deflateInit2 does not perform any compression: this will be done by
|
||||
deflate().
|
||||
deflate().
|
||||
*/
|
||||
|
||||
extern int deflateCopy OF((z_stream *dest,
|
||||
z_stream *source));
|
||||
extern int EXPORT deflateSetDictionary OF((z_streamp strm,
|
||||
const Bytef *dictionary,
|
||||
uInt dictLength));
|
||||
/*
|
||||
Initializes the compression dictionary (history buffer) from the given
|
||||
byte sequence without producing any compressed output. This function must
|
||||
be called immediately after deflateInit or deflateInit2, before any call
|
||||
of deflate. The compressor and decompressor must use exactly the same
|
||||
dictionary (see inflateSetDictionary).
|
||||
The dictionary should consist of strings (byte sequences) that are likely
|
||||
to be encountered later in the data to be compressed, with the most commonly
|
||||
used strings preferably put towards the end of the dictionary. Using a
|
||||
dictionary is most useful when the data to be compressed is short and
|
||||
can be predicted with good accuracy; the data can then be compressed better
|
||||
than with the default empty dictionary. In this version of the library,
|
||||
only the last 32K bytes of the dictionary are used.
|
||||
Upon return of this function, strm->adler is set to the Adler32 value
|
||||
of the dictionary; the decompressor may later use this value to determine
|
||||
which dictionary has been used by the compressor. (The Adler32 value
|
||||
applies to the whole dictionary even if only a subset of the dictionary is
|
||||
actually used by the compressor.)
|
||||
|
||||
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
|
||||
parameter is invalid (such as NULL dictionary) or the stream state
|
||||
is inconsistent (for example if deflate has already been called for this
|
||||
stream). deflateSetDictionary does not perform any compression: this will
|
||||
be done by deflate().
|
||||
*/
|
||||
|
||||
extern int EXPORT deflateCopy OF((z_streamp dest,
|
||||
z_streamp source));
|
||||
/*
|
||||
Sets the destination stream as a complete copy of the source stream. If
|
||||
the source stream is using an application-supplied history buffer, a new
|
||||
|
|
@ -520,20 +684,20 @@ extern int deflateCopy OF((z_stream *dest,
|
|||
application to provide the correct values of next_out and avail_out for the
|
||||
next call of deflate.
|
||||
|
||||
This function is useful when several compression strategies will be
|
||||
This function can be useful when several compression strategies will be
|
||||
tried, for example when there are several ways of pre-processing the input
|
||||
data with a filter. The streams that will be discarded should then be freed
|
||||
by calling deflateEnd. Note that deflateCopy duplicates the internal
|
||||
compression state which can be quite large, so this strategy is slow and
|
||||
can consume lots of memory.
|
||||
|
||||
deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
|
||||
(such as zalloc being NULL). msg is left unchanged in both source and
|
||||
destination.
|
||||
*/
|
||||
|
||||
extern int deflateReset OF((z_stream *strm));
|
||||
extern int EXPORT deflateReset OF((z_streamp strm));
|
||||
/*
|
||||
This function is equivalent to deflateEnd followed by deflateInit,
|
||||
but does not free and reallocate all the internal compression state.
|
||||
|
|
@ -544,11 +708,38 @@ extern int deflateReset OF((z_stream *strm));
|
|||
stream state was inconsistent (such as zalloc or state being NULL).
|
||||
*/
|
||||
|
||||
extern int inflateInit2 OF((z_stream *strm,
|
||||
int windowBits));
|
||||
extern int EXPORT deflateParams OF((z_streamp strm, int level, int strategy));
|
||||
/*
|
||||
Dynamically update the compression level and compression strategy.
|
||||
This can be used to switch between compression and straight copy of
|
||||
the input data, or to switch to a different kind of input data requiring
|
||||
a different strategy. If the compression level is changed, the input
|
||||
available so far is compressed with the old level (and may be flushed);
|
||||
the new level will take effect only at the next call of deflate().
|
||||
|
||||
Before the call of deflateParams, the stream state must be set as for
|
||||
a call of deflate(), since the currently available input may have to
|
||||
be compressed and flushed. In particular, strm->avail_out must be non-zero.
|
||||
|
||||
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
|
||||
stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
|
||||
if strm->avail_out was zero.
|
||||
*/
|
||||
|
||||
extern int EXPORT deflateOutputPending OF((z_streamp strm));
|
||||
/*
|
||||
Returns the number of bytes of output which are immediately
|
||||
available from the compressor (i.e. without any further input
|
||||
or flush).
|
||||
*/
|
||||
|
||||
/*
|
||||
extern int EXPORT inflateInit2 OF((z_streamp strm,
|
||||
int windowBits));
|
||||
|
||||
This is another version of inflateInit with more compression options. The
|
||||
fields next_out, zalloc and zfree must be initialized before by the caller.
|
||||
fields next_out, zalloc, zfree and opaque must be initialized before by
|
||||
the caller.
|
||||
|
||||
The windowBits parameter is the base two logarithm of the maximum window
|
||||
size (the size of the history buffer). It should be in the range 8..15 for
|
||||
|
|
@ -577,7 +768,26 @@ extern int inflateInit2 OF((z_stream *strm,
|
|||
inflate().
|
||||
*/
|
||||
|
||||
extern int inflateSync OF((z_stream *strm));
|
||||
extern int EXPORT inflateSetDictionary OF((z_streamp strm,
|
||||
const Bytef *dictionary,
|
||||
uInt dictLength));
|
||||
/*
|
||||
Initializes the decompression dictionary (history buffer) from the given
|
||||
uncompressed byte sequence. This function must be called immediately after
|
||||
a call of inflate if this call returned Z_NEED_DICT. The dictionary chosen
|
||||
by the compressor can be determined from the Adler32 value returned by this
|
||||
call of inflate. The compressor and decompressor must use exactly the same
|
||||
dictionary (see deflateSetDictionary).
|
||||
|
||||
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
|
||||
parameter is invalid (such as NULL dictionary) or the stream state is
|
||||
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
|
||||
expected one (incorrect Adler32 value). inflateSetDictionary does not
|
||||
perform any decompression: this will be done by subsequent calls of
|
||||
inflate().
|
||||
*/
|
||||
|
||||
extern int EXPORT inflateSync OF((z_streamp strm));
|
||||
/*
|
||||
Skips invalid compressed data until the special marker (see deflate()
|
||||
above) can be found, or until all available input is skipped. No output
|
||||
|
|
@ -592,7 +802,7 @@ extern int inflateSync OF((z_stream *strm));
|
|||
until success or end of the input data.
|
||||
*/
|
||||
|
||||
extern int inflateReset OF((z_stream *strm));
|
||||
extern int EXPORT inflateReset OF((z_streamp strm));
|
||||
/*
|
||||
This function is equivalent to inflateEnd followed by inflateInit,
|
||||
but does not free and reallocate all the internal decompression state.
|
||||
|
|
@ -611,15 +821,127 @@ extern int inflateIncomp OF((z_stream *strm));
|
|||
containing the data at next_in (except that the data is not output).
|
||||
*/
|
||||
|
||||
/* utility functions */
|
||||
|
||||
/*
|
||||
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, window size,
|
||||
standard memory allocation functions). The source code of these
|
||||
utility functions can easily be modified if you need special options.
|
||||
*/
|
||||
|
||||
extern int EXPORT compress OF((Bytef *dest, uLongf *destLen,
|
||||
const Bytef *source, uLong sourceLen));
|
||||
/*
|
||||
Compresses the source buffer into the destination buffer. sourceLen is
|
||||
the byte length of the source buffer. Upon entry, destLen is the total
|
||||
size of the destination buffer, which must be at least 0.1% larger than
|
||||
sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
|
||||
compressed buffer.
|
||||
This function can be used to compress a whole file at once if the
|
||||
input file is mmap'ed.
|
||||
compress returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
||||
buffer.
|
||||
*/
|
||||
|
||||
extern int EXPORT uncompress OF((Bytef *dest, uLongf *destLen,
|
||||
const Bytef *source, uLong sourceLen));
|
||||
/*
|
||||
Decompresses the source buffer into the destination buffer. sourceLen is
|
||||
the byte length of the source buffer. Upon entry, destLen is the total
|
||||
size of the destination buffer, which must be large enough to hold the
|
||||
entire uncompressed data. (The size of the uncompressed data must have
|
||||
been saved previously by the compressor and transmitted to the decompressor
|
||||
by some mechanism outside the scope of this compression library.)
|
||||
Upon exit, destLen is the actual size of the compressed buffer.
|
||||
This function can be used to decompress a whole file at once if the
|
||||
input file is mmap'ed.
|
||||
|
||||
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
||||
buffer, or Z_DATA_ERROR if the input data was corrupted.
|
||||
*/
|
||||
|
||||
|
||||
typedef voidp gzFile;
|
||||
|
||||
extern gzFile EXPORT gzopen OF((const char *path, const char *mode));
|
||||
/*
|
||||
Opens a gzip (.gz) file for reading or writing. The mode parameter
|
||||
is as in fopen ("rb" or "wb") but can also include a compression level
|
||||
("wb9"). gzopen can be used to read a file which is not in gzip format;
|
||||
in this case gzread will directly read from the file without decompression.
|
||||
gzopen returns NULL if the file could not be opened or if there was
|
||||
insufficient memory to allocate the (de)compression state; errno
|
||||
can be checked to distinguish the two cases (if errno is zero, the
|
||||
zlib error is Z_MEM_ERROR).
|
||||
*/
|
||||
|
||||
extern gzFile EXPORT gzdopen OF((int fd, const char *mode));
|
||||
/*
|
||||
gzdopen() associates a gzFile with the file descriptor fd. File
|
||||
descriptors are obtained from calls like open, dup, creat, pipe or
|
||||
fileno (in the file has been previously opened with fopen).
|
||||
The mode parameter is as in gzopen.
|
||||
The next call of gzclose on the returned gzFile will also close the
|
||||
file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
|
||||
descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
|
||||
gzdopen returns NULL if there was insufficient memory to allocate
|
||||
the (de)compression state.
|
||||
*/
|
||||
|
||||
extern int EXPORT gzread OF((gzFile file, voidp buf, unsigned len));
|
||||
/*
|
||||
Reads the given number of uncompressed bytes from the compressed file.
|
||||
If the input file was not in gzip format, gzread copies the given number
|
||||
of bytes into the buffer.
|
||||
gzread returns the number of uncompressed bytes actually read (0 for
|
||||
end of file, -1 for error). */
|
||||
|
||||
extern int EXPORT gzwrite OF((gzFile file, const voidp buf, unsigned len));
|
||||
/*
|
||||
Writes the given number of uncompressed bytes into the compressed file.
|
||||
gzwrite returns the number of uncompressed bytes actually written
|
||||
(0 in case of error).
|
||||
*/
|
||||
|
||||
extern int EXPORT gzflush OF((gzFile file, int flush));
|
||||
/*
|
||||
Flushes all pending output into the compressed file. The parameter
|
||||
flush is as in the deflate() function. The return value is the zlib
|
||||
error number (see function gzerror below). gzflush returns Z_OK if
|
||||
the flush parameter is Z_FINISH and all output could be flushed.
|
||||
gzflush should be called only when strictly necessary because it can
|
||||
degrade compression.
|
||||
*/
|
||||
|
||||
extern int EXPORT gzclose OF((gzFile file));
|
||||
/*
|
||||
Flushes all pending output if necessary, closes the compressed file
|
||||
and deallocates all the (de)compression state. The return value is the zlib
|
||||
error number (see function gzerror below).
|
||||
*/
|
||||
|
||||
extern const char * EXPORT gzerror OF((gzFile file, int *errnum));
|
||||
/*
|
||||
Returns the error message for the last error which occurred on the
|
||||
given compressed file. errnum is set to zlib error number. If an
|
||||
error occurred in the file system and not in the compression library,
|
||||
errnum is set to Z_ERRNO and the application may consult errno
|
||||
to get the exact error code.
|
||||
*/
|
||||
|
||||
/* checksum functions */
|
||||
|
||||
/*
|
||||
This function is not related to compression but is exported
|
||||
anyway because it might be useful in applications using the
|
||||
These functions are not related to compression but are exported
|
||||
anyway because they might be useful in applications using the
|
||||
compression library.
|
||||
*/
|
||||
|
||||
extern uLong adler32 OF((uLong adler, Bytef *buf, uInt len));
|
||||
extern uLong EXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
|
||||
|
||||
/*
|
||||
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
|
||||
|
|
@ -636,8 +958,56 @@ extern uLong adler32 OF((uLong adler, Bytef *buf, uInt len));
|
|||
if (adler != original_adler) error();
|
||||
*/
|
||||
|
||||
#ifndef _Z_UTIL_H
|
||||
extern uLong EXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
|
||||
/*
|
||||
Update a running crc with the bytes buf[0..len-1] and return the updated
|
||||
crc. If buf is NULL, this function returns the required initial value
|
||||
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();
|
||||
*/
|
||||
|
||||
|
||||
/* various hacks, don't look :) */
|
||||
|
||||
/* deflateInit and inflateInit are macros to allow checking the zlib version
|
||||
* and the compiler's view of z_stream:
|
||||
*/
|
||||
extern int EXPORT deflateInit_ OF((z_streamp strm, int level,
|
||||
const char *version, int stream_size));
|
||||
extern int EXPORT inflateInit_ OF((z_streamp strm,
|
||||
const char *version, int stream_size));
|
||||
extern int EXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
|
||||
int windowBits, int memLevel, int strategy,
|
||||
const char *version, int stream_size));
|
||||
extern int EXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
|
||||
const char *version, int stream_size));
|
||||
#define deflateInit(strm, level) \
|
||||
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
|
||||
#define inflateInit(strm) \
|
||||
inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
|
||||
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
|
||||
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
|
||||
(strategy), ZLIB_VERSION, sizeof(z_stream))
|
||||
#define inflateInit2(strm, windowBits) \
|
||||
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
|
||||
|
||||
#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL)
|
||||
struct internal_state {int dummy;}; /* hack for buggy compilers */
|
||||
#endif
|
||||
|
||||
uLongf *get_crc_table OF((void)); /* can be used by asm versions of crc32() */
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* _ZLIB_H */
|
||||
/* --- zlib.h */
|
||||
|
|
|
|||
Loading…
Reference in a new issue