1193323Sed/* $FreeBSD: releng/10.2/sys/net/zlib.h 245102 2013-01-06 14:59:59Z peter $ */ 2193323Sed 3193323Sed/* 4193323Sed * This file is derived from zlib.h and zconf.h from the zlib-1.0.4 5193323Sed * distribution by Jean-loup Gailly and Mark Adler, with some additions 6193323Sed * by Paul Mackerras to aid in implementing Deflate compression and 7193323Sed * decompression for PPP packets. 8193323Sed */ 9193323Sed 10193323Sed/* 11193323Sed * ==FILEVERSION 971127== 12193323Sed * 13193323Sed * This marker is used by the Linux installation script to determine 14193323Sed * whether an up-to-date version of this file is already installed. 15193323Sed */ 16193323Sed 17193323Sed 18193323Sed/* +++ zlib.h */ 19193323Sed/*- 20193323Sed zlib.h -- interface of the 'zlib' general purpose compression library 21193323Sed version 1.0.4, Jul 24th, 1996. 22193323Sed 23193323Sed Copyright (C) 1995-1996 Jean-loup Gailly and Mark Adler 24193323Sed 25195340Sed This software is provided 'as-is', without any express or implied 26193323Sed warranty. In no event will the authors be held liable for any damages 27193323Sed arising from the use of this software. 28193323Sed 29193323Sed Permission is granted to anyone to use this software for any purpose, 30193323Sed including commercial applications, and to alter it and redistribute it 31193323Sed freely, subject to the following restrictions: 32193323Sed 33208599Srdivacky 1. The origin of this software must not be misrepresented; you must not 34208599Srdivacky claim that you wrote the original software. If you use this software 35193323Sed in a product, an acknowledgment in the product documentation would be 36193323Sed appreciated but is not required. 37193323Sed 2. Altered source versions must be plainly marked as such, and must not be 38193323Sed misrepresented as being the original software. 39193323Sed 3. This notice may not be removed or altered from any source distribution. 40193323Sed 41193323Sed Jean-loup Gailly Mark Adler 42193323Sed gzip@prep.ai.mit.edu madler@alumni.caltech.edu 43193323Sed*/ 44193323Sed/* 45193323Sed The data format used by the zlib library is described by RFCs (Request for 46193323Sed Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt 47193323Sed (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). 48193323Sed*/ 49193323Sed 50193323Sed#ifndef _ZLIB_H 51193323Sed#define _ZLIB_H 52193323Sed 53193323Sed#ifdef __cplusplus 54193323Sedextern "C" { 55193323Sed#endif 56193323Sed 57193323Sed 58193323Sed/* +++ zconf.h */ 59193323Sed/* zconf.h -- configuration of the zlib compression library 60193323Sed * Copyright (C) 1995-1996 Jean-loup Gailly. 61193323Sed * For conditions of distribution and use, see copyright notice in zlib.h 62193323Sed */ 63193323Sed 64208599Srdivacky/* From: zconf.h,v 1.20 1996/07/02 15:09:28 me Exp $ */ 65208599Srdivacky 66193323Sed#ifndef _ZCONF_H 67193323Sed#define _ZCONF_H 68208599Srdivacky 69208599Srdivacky/* 70208599Srdivacky * If you *really* need a unique prefix for all types and library functions, 71208599Srdivacky * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it. 72208599Srdivacky */ 73208599Srdivacky#ifdef Z_PREFIX 74208599Srdivacky# define deflateInit_ z_deflateInit_ 75208599Srdivacky# define deflate z_deflate 76208599Srdivacky# define deflateEnd z_deflateEnd 77208599Srdivacky# define inflateInit_ z_inflateInit_ 78208599Srdivacky# define inflate z_inflate 79208599Srdivacky# define inflateEnd z_inflateEnd 80208599Srdivacky# define deflateInit2_ z_deflateInit2_ 81208599Srdivacky# define deflateSetDictionary z_deflateSetDictionary 82208599Srdivacky# define deflateCopy z_deflateCopy 83193323Sed# define deflateReset z_deflateReset 84195340Sed# define deflateParams z_deflateParams 85193323Sed# define inflateInit2_ z_inflateInit2_ 86193323Sed# define inflateSetDictionary z_inflateSetDictionary 87193323Sed# define inflateSync z_inflateSync 88193323Sed# define inflateReset z_inflateReset 89193323Sed# define compress z_compress 90193323Sed# define uncompress z_uncompress 91193323Sed# define adler32 z_adler32 92193323Sed#if 0 93193323Sed# define crc32 z_crc32 94193323Sed# define get_crc_table z_get_crc_table 95193323Sed#endif 96193323Sed 97193323Sed# define Byte z_Byte 98195340Sed# define uInt z_uInt 99193323Sed# define uLong z_uLong 100193323Sed# define Bytef z_Bytef 101193323Sed# define charf z_charf 102193323Sed# define intf z_intf 103193323Sed# define uIntf z_uIntf 104193323Sed# define uLongf z_uLongf 105193323Sed# define voidpf z_voidpf 106193323Sed# define voidp z_voidp 107193323Sed#endif 108193323Sed 109193323Sed#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32) 110193323Sed# define WIN32 111193323Sed#endif 112193323Sed#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(__i386__) 113193323Sed# ifndef __32BIT__ 114193323Sed# define __32BIT__ 115193323Sed# endif 116193323Sed#endif 117193323Sed#if defined(__MSDOS__) && !defined(MSDOS) 118193323Sed# define MSDOS 119193323Sed#endif 120193323Sed 121193323Sed/* 122193323Sed * Compile with -DMAXSEG_64K if the alloc function cannot allocate more 123193323Sed * than 64k bytes at a time (needed on systems with 16-bit int). 124193323Sed */ 125193323Sed#if defined(MSDOS) && !defined(__32BIT__) 126193323Sed# define MAXSEG_64K 127193323Sed#endif 128193323Sed#ifdef MSDOS 129193323Sed# define UNALIGNED_OK 130193323Sed#endif 131193323Sed 132193323Sed#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32)) && !defined(STDC) 133193323Sed# define STDC 134193323Sed#endif 135193323Sed#if (defined(__STDC__) || defined(__cplusplus)) && !defined(STDC) 136195340Sed# define STDC 137193323Sed#endif 138193323Sed 139193323Sed#ifndef STDC 140193323Sed# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */ 141193323Sed# define const 142193323Sed# endif 143193323Sed#endif 144193323Sed 145193323Sed/* Some Mac compilers merge all .h files incorrectly: */ 146193323Sed#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__) 147195340Sed# define NO_DUMMY_DECL 148193323Sed#endif 149193323Sed 150193323Sed/* Maximum value for memLevel in deflateInit2 */ 151193323Sed#ifndef MAX_MEM_LEVEL 152193323Sed# ifdef MAXSEG_64K 153193323Sed# define MAX_MEM_LEVEL 8 154193323Sed# else 155193323Sed# define MAX_MEM_LEVEL 9 156193323Sed# endif 157193323Sed#endif 158193323Sed 159193323Sed/* Maximum value for windowBits in deflateInit2 and inflateInit2 */ 160193323Sed#ifndef MAX_WBITS 161193323Sed# define MAX_WBITS 15 /* 32K LZ77 window */ 162195340Sed#endif 163198090Srdivacky 164198090Srdivacky/* The memory requirements for deflate are (in bytes): 165198090Srdivacky 1 << (windowBits+2) + 1 << (memLevel+9) 166193323Sed that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) 167193323Sed plus a few kilobytes for small objects. For example, if you want to reduce 168198090Srdivacky the default memory requirements from 256K to 128K, compile with 169193323Sed make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" 170198090Srdivacky Of course this will generally degrade compression (there's no free lunch). 171193323Sed 172198090Srdivacky The memory requirements for inflate are (in bytes) 1 << windowBits 173193323Sed that is, 32K for windowBits=15 (default value) plus a few kilobytes 174198090Srdivacky for small objects. 175193323Sed*/ 176198090Srdivacky 177193323Sed /* Type declarations */ 178198090Srdivacky 179193323Sed#ifndef OF /* function prototypes */ 180198090Srdivacky# ifdef STDC 181198090Srdivacky# define OF(args) args 182198090Srdivacky# else 183193323Sed# define OF(args) () 184193323Sed# endif 185193323Sed#endif 186193323Sed 187193323Sed/* The following definitions for FAR are needed only for MSDOS mixed 188195340Sed * model programming (small or medium model with some far allocations). 189193323Sed * This was tested only with MSC; for other MSDOS compilers you may have 190193323Sed * to define NO_MEMCPY in zutil.h. If you don't need the mixed model, 191195340Sed * just define FAR to be empty. 192193323Sed */ 193193323Sed#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__) 194206083Srdivacky /* MSC small or medium model */ 195206083Srdivacky# define SMALL_MEDIUM 196206083Srdivacky# ifdef _MSC_VER 197206083Srdivacky# define FAR __far 198206083Srdivacky# else 199193323Sed# define FAR far 200198090Srdivacky# endif 201193323Sed#endif 202193323Sed#if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__)) 203193323Sed# ifndef __32BIT__ 204193323Sed# define SMALL_MEDIUM 205193323Sed# define FAR __far 206193323Sed# endif 207193323Sed#endif 208193323Sed#ifndef FAR 209193323Sed# define FAR 210193323Sed#endif 211195340Sed 212193323Sedtypedef unsigned char Byte; /* 8 bits */ 213193323Sedtypedef unsigned int uInt; /* 16 bits or more */ 214193323Sedtypedef unsigned long uLong; /* 32 bits or more */ 215193323Sed 216193323Sed#if defined(__BORLANDC__) && defined(SMALL_MEDIUM) 217193323Sed /* Borland C/C++ ignores FAR inside typedef */ 218193323Sed# define Bytef Byte FAR 219193323Sed#else 220193323Sed typedef Byte FAR Bytef; 221193323Sed#endif 222193323Sedtypedef char FAR charf; 223193323Sedtypedef int FAR intf; 224193323Sedtypedef uInt FAR uIntf; 225193323Sedtypedef uLong FAR uLongf; 226198090Srdivacky 227193323Sed#ifdef STDC 228193323Sed typedef void FAR *voidpf; 229193323Sed typedef void *voidp; 230193323Sed#else 231193323Sed typedef Byte FAR *voidpf; 232193323Sed typedef Byte *voidp; 233198090Srdivacky#endif 234198090Srdivacky 235193323Sed 236198090Srdivacky/* Compile with -DZLIB_DLL for Windows DLL support */ 237193323Sed#if (defined(_WINDOWS) || defined(WINDOWS)) && defined(ZLIB_DLL) 238193323Sed# include <windows.h> 239193323Sed# define EXPORT WINAPI 240193323Sed#else 241193323Sed# define EXPORT 242193323Sed#endif 243193323Sed 244193323Sed#endif /* _ZCONF_H */ 245193323Sed/* --- zconf.h */ 246193323Sed 247193323Sed#define ZLIB_VERSION "1.0.4P" 248193323Sed 249193323Sed/* 250193323Sed The 'zlib' compression library provides in-memory compression and 251193323Sed decompression functions, including integrity checks of the uncompressed 252198090Srdivacky data. This version of the library supports only one compression method 253193323Sed (deflation) but other algorithms may be added later and will have the same 254193323Sed stream interface. 255193323Sed 256193323Sed For compression the application must provide the output buffer and 257193323Sed may optionally provide the input buffer for optimization. For decompression, 258193323Sed the application must provide the input buffer and may optionally provide 259193323Sed the output buffer for optimization. 260193323Sed 261193323Sed Compression can be done in a single step if the buffers are large 262193323Sed enough (for example if an input file is mmap'ed), or can be done by 263193323Sed repeated calls of the compression function. In the latter case, the 264193323Sed application must provide more input and/or consume the output 265193323Sed (providing more output space) before each call. 266193323Sed 267193323Sed The library does not install any signal handler. It is recommended to 268193323Sed add at least a handler for SIGSEGV when decompressing; the library checks 269193323Sed the consistency of the input data whenever possible but may go nuts 270193323Sed for some forms of corrupted input. 271193323Sed*/ 272193323Sed 273193323Sedtypedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); 274206083Srdivackytypedef void (*free_func) OF((voidpf opaque, voidpf address)); 275193323Sed 276193323Sedstruct internal_state; 277193323Sed 278206083Srdivackytypedef struct z_stream_s { 279193323Sed Bytef *next_in; /* next input byte */ 280193323Sed uInt avail_in; /* number of bytes available at next_in */ 281193323Sed uLong total_in; /* total nb of input bytes read so far */ 282193323Sed 283193323Sed Bytef *next_out; /* next output byte should be put there */ 284193323Sed uInt avail_out; /* remaining free space at next_out */ 285193323Sed uLong total_out; /* total nb of bytes output so far */ 286193323Sed 287193323Sed const char *msg; /* last error message, NULL if no error */ 288193323Sed struct internal_state FAR *state; /* not visible by applications */ 289193323Sed 290193323Sed alloc_func zalloc; /* used to allocate the internal state */ 291193323Sed free_func zfree; /* used to free the internal state */ 292193323Sed voidpf opaque; /* private data object passed to zalloc and zfree */ 293193323Sed 294193323Sed int data_type; /* best guess about the data type: ascii or binary */ 295193323Sed uLong adler; /* adler32 value of the uncompressed data */ 296193323Sed uLong reserved; /* reserved for future use */ 297193323Sed} z_stream; 298193323Sed 299193323Sedtypedef z_stream FAR *z_streamp; 300195340Sed 301193323Sed/* 302193323Sed The application must update next_in and avail_in when avail_in has 303193323Sed dropped to zero. It must update next_out and avail_out when avail_out 304193323Sed has dropped to zero. The application must initialize zalloc, zfree and 305193323Sed opaque before calling the init function. All other fields are set by the 306193323Sed compression library and must not be updated by the application. 307193323Sed 308193323Sed The opaque value provided by the application will be passed as the first 309193323Sed parameter for calls of zalloc and zfree. This can be useful for custom 310193323Sed memory management. The compression library attaches no meaning to the 311193323Sed opaque value. 312193323Sed 313193323Sed zalloc must return Z_NULL if there is not enough memory for the object. 314193323Sed On 16-bit systems, the functions zalloc and zfree must be able to allocate 315193323Sed exactly 65536 bytes, but will not be required to allocate more than this 316193323Sed if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, 317193323Sed pointers returned by zalloc for objects of exactly 65536 bytes *must* 318193323Sed have their offset normalized to zero. The default allocation function 319193323Sed provided by this library ensures this (see zutil.c). To reduce memory 320193323Sed requirements and avoid any allocation of 64K objects, at the expense of 321193323Sed compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h). 322193323Sed 323193323Sed The fields total_in and total_out can be used for statistics or 324193323Sed progress reports. After compression, total_in holds the total size of 325193323Sed the uncompressed data and may be saved for use in the decompressor 326193323Sed (particularly if the decompressor wants to decompress everything in 327198090Srdivacky a single step). 328193323Sed*/ 329193323Sed 330193323Sed /* constants */ 331193323Sed 332193323Sed#define Z_NO_FLUSH 0 333193323Sed#define Z_PARTIAL_FLUSH 1 334193323Sed#define Z_PACKET_FLUSH 2 335193323Sed#define Z_SYNC_FLUSH 3 336193323Sed#define Z_FULL_FLUSH 4 337193323Sed#define Z_FINISH 5 338193323Sed/* Allowed flush values; see deflate() below for details */ 339198090Srdivacky 340198090Srdivacky#define Z_OK 0 341198090Srdivacky#define Z_STREAM_END 1 342193323Sed#define Z_NEED_DICT 2 343193323Sed#define Z_ERRNO (-1) 344193323Sed#define Z_STREAM_ERROR (-2) 345193323Sed#define Z_DATA_ERROR (-3) 346193323Sed#define Z_MEM_ERROR (-4) 347193323Sed#define Z_BUF_ERROR (-5) 348193323Sed#define Z_VERSION_ERROR (-6) 349193323Sed/* Return codes for the compression/decompression functions. Negative 350193323Sed * values are errors, positive values are used for special but normal events. 351193323Sed */ 352198090Srdivacky 353198090Srdivacky#define Z_NO_COMPRESSION 0 354198090Srdivacky#define Z_BEST_SPEED 1 355193323Sed#define Z_BEST_COMPRESSION 9 356193323Sed#define Z_DEFAULT_COMPRESSION (-1) 357193323Sed/* compression levels */ 358193323Sed 359193323Sed#define Z_FILTERED 1 360193323Sed#define Z_HUFFMAN_ONLY 2 361193323Sed#define Z_DEFAULT_STRATEGY 0 362193323Sed/* compression strategy; see deflateInit2() below for details */ 363193323Sed 364193323Sed#define Z_BINARY 0 365193323Sed#define Z_ASCII 1 366193323Sed#define Z_UNKNOWN 2 367198090Srdivacky/* Possible values of the data_type field */ 368198090Srdivacky 369198090Srdivacky#define Z_DEFLATED 8 370193323Sed/* The deflate compression method (the only one supported in this version) */ 371193323Sed 372193323Sed#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ 373193323Sed 374193323Sed#define zlib_version zlibVersion() 375193323Sed/* for compatibility with versions < 1.0.2 */ 376193323Sed 377193323Sed /* basic functions */ 378193323Sed 379193323Sedextern const char * EXPORT zlibVersion OF((void)); 380198090Srdivacky/* The application can compare zlibVersion and ZLIB_VERSION for consistency. 381198090Srdivacky If the first character differs, the library code actually used is 382198090Srdivacky not compatible with the zlib.h header file used by the application. 383193323Sed This check is automatically made by deflateInit and inflateInit. 384193323Sed */ 385193323Sed 386193323Sed/* 387193323Sedextern int EXPORT deflateInit OF((z_streamp strm, int level)); 388193323Sed 389193323Sed Initializes the internal stream state for compression. The fields 390193323Sed zalloc, zfree and opaque must be initialized before by the caller. 391193323Sed If zalloc and zfree are set to Z_NULL, deflateInit updates them to 392193323Sed use default allocation functions. 393193323Sed 394193323Sed The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: 395193323Sed 1 gives best speed, 9 gives best compression, 0 gives no compression at 396195340Sed all (the input data is simply copied a block at a time). 397193323Sed Z_DEFAULT_COMPRESSION requests a default compromise between speed and 398193323Sed compression (currently equivalent to level 6). 399193323Sed 400193323Sed deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not 401193323Sed enough memory, Z_STREAM_ERROR if level is not a valid compression level, 402193323Sed Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible 403193323Sed with the version assumed by the caller (ZLIB_VERSION). 404193323Sed msg is set to null if there is no error message. deflateInit does not 405193323Sed perform any compression: this will be done by deflate(). 406193323Sed*/ 407193323Sed 408193323Sed 409193323Sedextern int EXPORT deflate OF((z_streamp strm, int flush)); 410193323Sed/* 411193323Sed Performs one or both of the following actions: 412193323Sed 413193323Sed - Compress more input starting at next_in and update next_in and avail_in 414193323Sed accordingly. If not all input can be processed (because there is not 415193323Sed enough room in the output buffer), next_in and avail_in are updated and 416193323Sed processing will resume at this point for the next call of deflate(). 417193323Sed 418193323Sed - Provide more output starting at next_out and update next_out and avail_out 419193323Sed accordingly. This action is forced if the parameter flush is non zero. 420193323Sed Forcing flush frequently degrades the compression ratio, so this parameter 421193323Sed should be set only when necessary (in interactive applications). 422193323Sed Some output may be provided even if flush is not set. 423193323Sed 424193323Sed Before the call of deflate(), the application should ensure that at least 425193323Sed one of the actions is possible, by providing more input and/or consuming 426193323Sed more output, and updating avail_in or avail_out accordingly; avail_out 427193323Sed should never be zero before the call. The application can consume the 428193323Sed compressed output when it wants, for example when the output buffer is full 429193323Sed (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK 430193323Sed and with zero avail_out, it must be called again after making room in the 431193323Sed output buffer because there might be more output pending. 432193323Sed 433193323Sed If the parameter flush is set to Z_PARTIAL_FLUSH, the current compression 434193323Sed block is terminated and flushed to the output buffer so that the 435193323Sed decompressor can get all input data available so far. For method 9, a future 436193323Sed variant on method 8, the current block will be flushed but not terminated. 437193323Sed Z_SYNC_FLUSH has the same effect as partial flush except that the compressed 438193323Sed output is byte aligned (the compressor can clear its internal bit buffer) 439193323Sed and the current block is always terminated; this can be useful if the 440193323Sed compressor has to be restarted from scratch after an interruption (in which 441193323Sed case the internal state of the compressor may be lost). 442193323Sed If flush is set to Z_FULL_FLUSH, the compression block is terminated, a 443193323Sed special marker is output and the compression dictionary is discarded; this 444193323Sed is useful to allow the decompressor to synchronize if one compressed block 445193323Sed has been damaged (see inflateSync below). Flushing degrades compression and 446193323Sed so should be used only when necessary. Using Z_FULL_FLUSH too often can 447193323Sed seriously degrade the compression. If deflate returns with avail_out == 0, 448193323Sed this function must be called again with the same value of the flush 449193323Sed parameter and more output space (updated avail_out), until the flush is 450193323Sed complete (deflate returns with non-zero avail_out). 451193323Sed 452193323Sed If the parameter flush is set to Z_PACKET_FLUSH, the compression 453195340Sed block is terminated, and a zero-length stored block is output, 454193323Sed omitting the length bytes (the effect of this is that the 3-bit type 455193323Sed code 000 for a stored block is output, and the output is then 456193323Sed byte-aligned). This is designed for use at the end of a PPP packet. 457193323Sed 458193323Sed If the parameter flush is set to Z_FINISH, pending input is processed, 459193323Sed pending output is flushed and deflate returns with Z_STREAM_END if there 460193323Sed was enough output space; if deflate returns with Z_OK, this function must be 461193323Sed called again with Z_FINISH and more output space (updated avail_out) but no 462193323Sed more input data, until it returns with Z_STREAM_END or an error. After 463193323Sed deflate has returned Z_STREAM_END, the only possible operations on the 464193323Sed stream are deflateReset or deflateEnd. 465193323Sed 466193323Sed Z_FINISH can be used immediately after deflateInit if all the compression 467193323Sed is to be done in a single step. In this case, avail_out must be at least 468193323Sed 0.1% larger than avail_in plus 12 bytes. If deflate does not return 469193323Sed Z_STREAM_END, then it must be called again as described above. 470193323Sed 471193323Sed deflate() may update data_type if it can make a good guess about 472193323Sed the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered 473193323Sed binary. This field is only for information purposes and does not affect 474193323Sed the compression algorithm in any manner. 475193323Sed 476193323Sed deflate() returns Z_OK if some progress has been made (more input 477193323Sed processed or more output produced), Z_STREAM_END if all input has been 478193323Sed consumed and all output has been produced (only when flush is set to 479193323Sed Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example 480193323Sed if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible. 481193323Sed*/ 482193323Sed 483193323Sed 484193323Sedextern int EXPORT deflateEnd OF((z_streamp strm)); 485193323Sed/* 486193323Sed All dynamically allocated data structures for this stream are freed. 487193323Sed This function discards any unprocessed input and does not flush any 488193323Sed pending output. 489193323Sed 490193323Sed deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the 491193323Sed stream state was inconsistent, Z_DATA_ERROR if the stream was freed 492193323Sed prematurely (some input or output was discarded). In the error case, 493193323Sed msg may be set but then points to a static string (which must not be 494193323Sed deallocated). 495193323Sed*/ 496193323Sed 497193323Sed 498193323Sed/* 499193323Sedextern int EXPORT inflateInit OF((z_streamp strm)); 500193323Sed 501193323Sed Initializes the internal stream state for decompression. The fields 502193323Sed zalloc, zfree and opaque must be initialized before by the caller. If 503193323Sed zalloc and zfree are set to Z_NULL, inflateInit updates them to use default 504193323Sed allocation functions. 505193323Sed 506193323Sed inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not 507193323Sed enough memory, Z_VERSION_ERROR if the zlib library version is incompatible 508193323Sed with the version assumed by the caller. msg is set to null if there is no 509193323Sed error message. inflateInit does not perform any decompression: this will be 510193323Sed done by inflate(). 511193323Sed*/ 512193323Sed 513193323Sed#if defined(__FreeBSD__) && defined(_KERNEL) 514193323Sed#define inflate _zlib104_inflate /* FreeBSD already has an inflate :-( */ 515193323Sed#endif 516193323Sed 517193323Sedextern int EXPORT inflate OF((z_streamp strm, int flush)); 518193323Sed/* 519193323Sed Performs one or both of the following actions: 520193323Sed 521193323Sed - Decompress more input starting at next_in and update next_in and avail_in 522193323Sed accordingly. If not all input can be processed (because there is not 523193323Sed enough room in the output buffer), next_in is updated and processing 524193323Sed will resume at this point for the next call of inflate(). 525193323Sed 526193323Sed - Provide more output starting at next_out and update next_out and avail_out 527193323Sed accordingly. inflate() provides as much output as possible, until there 528193323Sed is no more input data or no more space in the output buffer (see below 529193323Sed about the flush parameter). 530193323Sed 531193323Sed Before the call of inflate(), the application should ensure that at least 532193323Sed one of the actions is possible, by providing more input and/or consuming 533193323Sed more output, and updating the next_* and avail_* values accordingly. 534193323Sed The application can consume the uncompressed output when it wants, for 535193323Sed example when the output buffer is full (avail_out == 0), or after each 536193323Sed call of inflate(). If inflate returns Z_OK and with zero avail_out, it 537193323Sed must be called again after making room in the output buffer because there 538193323Sed might be more output pending. 539193323Sed 540193323Sed If the parameter flush is set to Z_PARTIAL_FLUSH or Z_PACKET_FLUSH, 541193323Sed inflate flushes as much output as possible to the output buffer. The 542195340Sed flushing behavior of inflate is not specified for values of the flush 543193323Sed parameter other than Z_PARTIAL_FLUSH, Z_PACKET_FLUSH or Z_FINISH, but the 544193323Sed current implementation actually flushes as much output as possible 545202375Srdivacky anyway. For Z_PACKET_FLUSH, inflate checks that once all the input data 546193323Sed has been consumed, it is expecting to see the length field of a stored 547193323Sed block; if not, it returns Z_DATA_ERROR. 548193323Sed 549193323Sed inflate() should normally be called until it returns Z_STREAM_END or an 550193323Sed error. However if all decompression is to be performed in a single step 551193323Sed (a single call of inflate), the parameter flush should be set to 552193323Sed Z_FINISH. In this case all pending input is processed and all pending 553193323Sed output is flushed; avail_out must be large enough to hold all the 554193323Sed uncompressed data. (The size of the uncompressed data may have been saved 555193323Sed by the compressor for this purpose.) The next operation on this stream must 556193323Sed be inflateEnd to deallocate the decompression state. The use of Z_FINISH 557193323Sed is never required, but can be used to inform inflate that a faster routine 558193323Sed may be used for the single inflate() call. 559193323Sed 560193323Sed inflate() returns Z_OK if some progress has been made (more input 561193323Sed processed or more output produced), Z_STREAM_END if the end of the 562193323Sed compressed data has been reached and all uncompressed output has been 563193323Sed produced, Z_NEED_DICT if a preset dictionary is needed at this point (see 564193323Sed inflateSetDictionary below), Z_DATA_ERROR if the input data was corrupted, 565193323Sed Z_STREAM_ERROR if the stream structure was inconsistent (for example if 566193323Sed next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory, 567193323Sed Z_BUF_ERROR if no progress is possible or if there was not enough room in 568193323Sed the output buffer when Z_FINISH is used. In the Z_DATA_ERROR case, the 569193323Sed application may then call inflateSync to look for a good compression block. 570193323Sed In the Z_NEED_DICT case, strm->adler is set to the Adler32 value of the 571193323Sed dictionary chosen by the compressor. 572195340Sed*/ 573193323Sed 574193323Sed 575193323Sedextern int EXPORT inflateEnd OF((z_streamp strm)); 576193323Sed/* 577193323Sed All dynamically allocated data structures for this stream are freed. 578193323Sed This function discards any unprocessed input and does not flush any 579193323Sed pending output. 580193323Sed 581193323Sed inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state 582193323Sed was inconsistent. In the error case, msg may be set but then points to a 583193323Sed static string (which must not be deallocated). 584193323Sed*/ 585193323Sed 586193323Sed /* Advanced functions */ 587193323Sed 588193323Sed/* 589193323Sed The following functions are needed only in some special applications. 590193323Sed*/ 591193323Sed 592193323Sed/* 593193323Sedextern int EXPORT deflateInit2 OF((z_streamp strm, 594193323Sed int level, 595193323Sed int method, 596193323Sed int windowBits, 597195340Sed int memLevel, 598193323Sed int strategy)); 599193323Sed 600193323Sed This is another version of deflateInit with more compression options. The 601193323Sed fields next_in, zalloc, zfree and opaque must be initialized before by 602193323Sed the caller. 603193323Sed 604193323Sed The method parameter is the compression method. It must be Z_DEFLATED in 605193323Sed this version of the library. (Method 9 will allow a 64K history buffer and 606193323Sed partial block flushes.) 607193323Sed 608193323Sed The windowBits parameter is the base two logarithm of the window size 609193323Sed (the size of the history buffer). It should be in the range 8..15 for this 610193323Sed version of the library (the value 16 will be allowed for method 9). Larger 611193323Sed values of this parameter result in better compression at the expense of 612193323Sed memory usage. The default value is 15 if deflateInit is used instead. 613193323Sed 614193323Sed The memLevel parameter specifies how much memory should be allocated 615193323Sed for the internal compression state. memLevel=1 uses minimum memory but 616193323Sed is slow and reduces compression ratio; memLevel=9 uses maximum memory 617193323Sed for optimal speed. The default value is 8. See zconf.h for total memory 618193323Sed usage as a function of windowBits and memLevel. 619193323Sed 620193323Sed The strategy parameter is used to tune the compression algorithm. Use the 621193323Sed value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a 622193323Sed filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no 623193323Sed string match). Filtered data consists mostly of small values with a 624193323Sed somewhat random distribution. In this case, the compression algorithm is 625193323Sed tuned to compress them better. The effect of Z_FILTERED is to force more 626193323Sed Huffman coding and less string matching; it is somewhat intermediate 627193323Sed between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects 628193323Sed the compression ratio but not the correctness of the compressed output even 629193323Sed if it is not set appropriately. 630193323Sed 631193323Sed If next_in is not null, the library will use this buffer to hold also 632193323Sed some history information; the buffer must either hold the entire input 633193323Sed data, or have at least 1<<(windowBits+1) bytes and be writable. If next_in 634193323Sed is null, the library will allocate its own history buffer (and leave next_in 635193323Sed null). next_out need not be provided here but must be provided by the 636193323Sed application for the next call of deflate(). 637193323Sed 638193323Sed If the history buffer is provided by the application, next_in must 639193323Sed must never be changed by the application since the compressor maintains 640193323Sed information inside this buffer from call to call; the application 641193323Sed must provide more input only by increasing avail_in. next_in is always 642193323Sed reset by the library in this case. 643193323Sed 644193323Sed deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was 645193323Sed not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as 646193323Sed an invalid method). msg is set to null if there is no error message. 647193323Sed deflateInit2 does not perform any compression: this will be done by 648193323Sed deflate(). 649193323Sed*/ 650193323Sed 651193323Sedextern int EXPORT deflateSetDictionary OF((z_streamp strm, 652193323Sed const Bytef *dictionary, 653193323Sed uInt dictLength)); 654193323Sed/* 655193323Sed Initializes the compression dictionary (history buffer) from the given 656193323Sed byte sequence without producing any compressed output. This function must 657193323Sed be called immediately after deflateInit or deflateInit2, before any call 658193323Sed of deflate. The compressor and decompressor must use exactly the same 659193323Sed dictionary (see inflateSetDictionary). 660193323Sed The dictionary should consist of strings (byte sequences) that are likely 661193323Sed to be encountered later in the data to be compressed, with the most commonly 662193323Sed used strings preferably put towards the end of the dictionary. Using a 663193323Sed dictionary is most useful when the data to be compressed is short and 664193323Sed can be predicted with good accuracy; the data can then be compressed better 665193323Sed than with the default empty dictionary. In this version of the library, 666193323Sed only the last 32K bytes of the dictionary are used. 667193323Sed Upon return of this function, strm->adler is set to the Adler32 value 668193323Sed of the dictionary; the decompressor may later use this value to determine 669193323Sed which dictionary has been used by the compressor. (The Adler32 value 670193323Sed applies to the whole dictionary even if only a subset of the dictionary is 671195340Sed actually used by the compressor.) 672193323Sed 673193323Sed deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a 674193323Sed parameter is invalid (such as NULL dictionary) or the stream state 675193323Sed is inconsistent (for example if deflate has already been called for this 676193323Sed stream). deflateSetDictionary does not perform any compression: this will 677193323Sed be done by deflate(). 678193323Sed*/ 679193323Sed 680193323Sedextern int EXPORT deflateCopy OF((z_streamp dest, 681193323Sed z_streamp source)); 682193323Sed/* 683193323Sed Sets the destination stream as a complete copy of the source stream. If 684193323Sed the source stream is using an application-supplied history buffer, a new 685193323Sed buffer is allocated for the destination stream. The compressed output 686193323Sed buffer is always application-supplied. It's the responsibility of the 687193323Sed application to provide the correct values of next_out and avail_out for the 688193323Sed next call of deflate. 689193323Sed 690193323Sed This function can be useful when several compression strategies will be 691193323Sed tried, for example when there are several ways of pre-processing the input 692193323Sed data with a filter. The streams that will be discarded should then be freed 693193323Sed by calling deflateEnd. Note that deflateCopy duplicates the internal 694193323Sed compression state which can be quite large, so this strategy is slow and 695193323Sed can consume lots of memory. 696193323Sed 697193323Sed deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not 698195340Sed enough memory, Z_STREAM_ERROR if the source stream state was inconsistent 699193323Sed (such as zalloc being NULL). msg is left unchanged in both source and 700193323Sed destination. 701193323Sed*/ 702193323Sed 703193323Sedextern int EXPORT deflateReset OF((z_streamp strm)); 704193323Sed/* 705193323Sed This function is equivalent to deflateEnd followed by deflateInit, 706193323Sed but does not free and reallocate all the internal compression state. 707193323Sed The stream will keep the same compression level and any other attributes 708193323Sed that may have been set by deflateInit2. 709193323Sed 710193323Sed deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source 711193323Sed stream state was inconsistent (such as zalloc or state being NULL). 712193323Sed*/ 713193323Sed 714193323Sedextern int EXPORT deflateParams OF((z_streamp strm, int level, int strategy)); 715193323Sed/* 716193323Sed Dynamically update the compression level and compression strategy. 717193323Sed This can be used to switch between compression and straight copy of 718193323Sed the input data, or to switch to a different kind of input data requiring 719193323Sed a different strategy. If the compression level is changed, the input 720193323Sed available so far is compressed with the old level (and may be flushed); 721193323Sed the new level will take effect only at the next call of deflate(). 722193323Sed 723193323Sed Before the call of deflateParams, the stream state must be set as for 724193323Sed a call of deflate(), since the currently available input may have to 725193323Sed be compressed and flushed. In particular, strm->avail_out must be non-zero. 726193323Sed 727193323Sed deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source 728193323Sed stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR 729193323Sed if strm->avail_out was zero. 730193323Sed*/ 731193323Sed 732193323Sedextern int EXPORT deflateOutputPending OF((z_streamp strm)); 733193323Sed/* 734193323Sed Returns the number of bytes of output which are immediately 735193323Sed available from the compressor (i.e. without any further input 736193323Sed or flush). 737193323Sed*/ 738193323Sed 739193323Sed/* 740193323Sedextern int EXPORT inflateInit2 OF((z_streamp strm, 741193323Sed int windowBits)); 742193323Sed 743193323Sed This is another version of inflateInit with more compression options. The 744193323Sed fields next_out, zalloc, zfree and opaque must be initialized before by 745193323Sed the caller. 746193323Sed 747193323Sed The windowBits parameter is the base two logarithm of the maximum window 748193323Sed size (the size of the history buffer). It should be in the range 8..15 for 749193323Sed this version of the library (the value 16 will be allowed soon). The 750193323Sed default value is 15 if inflateInit is used instead. If a compressed stream 751193323Sed with a larger window size is given as input, inflate() will return with 752 the error code Z_DATA_ERROR instead of trying to allocate a larger window. 753 754 If next_out is not null, the library will use this buffer for the history 755 buffer; the buffer must either be large enough to hold the entire output 756 data, or have at least 1<<windowBits bytes. If next_out is null, the 757 library will allocate its own buffer (and leave next_out null). next_in 758 need not be provided here but must be provided by the application for the 759 next call of inflate(). 760 761 If the history buffer is provided by the application, next_out must 762 never be changed by the application since the decompressor maintains 763 history information inside this buffer from call to call; the application 764 can only reset next_out to the beginning of the history buffer when 765 avail_out is zero and all output has been consumed. 766 767 inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was 768 not enough memory, Z_STREAM_ERROR if a parameter is invalid (such as 769 windowBits < 8). msg is set to null if there is no error message. 770 inflateInit2 does not perform any decompression: this will be done by 771 inflate(). 772*/ 773 774extern int EXPORT inflateSetDictionary OF((z_streamp strm, 775 const Bytef *dictionary, 776 uInt dictLength)); 777/* 778 Initializes the decompression dictionary (history buffer) from the given 779 uncompressed byte sequence. This function must be called immediately after 780 a call of inflate if this call returned Z_NEED_DICT. The dictionary chosen 781 by the compressor can be determined from the Adler32 value returned by this 782 call of inflate. The compressor and decompressor must use exactly the same 783 dictionary (see deflateSetDictionary). 784 785 inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a 786 parameter is invalid (such as NULL dictionary) or the stream state is 787 inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the 788 expected one (incorrect Adler32 value). inflateSetDictionary does not 789 perform any decompression: this will be done by subsequent calls of 790 inflate(). 791*/ 792 793extern int EXPORT inflateSync OF((z_streamp strm)); 794/* 795 Skips invalid compressed data until the special marker (see deflate() 796 above) can be found, or until all available input is skipped. No output 797 is provided. 798 799 inflateSync returns Z_OK if the special marker has been found, Z_BUF_ERROR 800 if no more input was provided, Z_DATA_ERROR if no marker has been found, 801 or Z_STREAM_ERROR if the stream structure was inconsistent. In the success 802 case, the application may save the current current value of total_in which 803 indicates where valid compressed data was found. In the error case, the 804 application may repeatedly call inflateSync, providing more input each time, 805 until success or end of the input data. 806*/ 807 808extern int EXPORT inflateReset OF((z_streamp strm)); 809/* 810 This function is equivalent to inflateEnd followed by inflateInit, 811 but does not free and reallocate all the internal decompression state. 812 The stream will keep attributes that may have been set by inflateInit2. 813 814 inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source 815 stream state was inconsistent (such as zalloc or state being NULL). 816*/ 817 818extern int inflateIncomp OF((z_stream *strm)); 819/* 820 This function adds the data at next_in (avail_in bytes) to the output 821 history without performing any output. There must be no pending output, 822 and the decompressor must be expecting to see the start of a block. 823 Calling this function is equivalent to decompressing a stored block 824 containing the data at next_in (except that the data is not output). 825*/ 826 827 /* utility functions */ 828 829/* 830 The following utility functions are implemented on top of the 831 basic stream-oriented functions. To simplify the interface, some 832 default options are assumed (compression level, window size, 833 standard memory allocation functions). The source code of these 834 utility functions can easily be modified if you need special options. 835*/ 836 837extern int EXPORT compress OF((Bytef *dest, uLongf *destLen, 838 const Bytef *source, uLong sourceLen)); 839/* 840 Compresses the source buffer into the destination buffer. sourceLen is 841 the byte length of the source buffer. Upon entry, destLen is the total 842 size of the destination buffer, which must be at least 0.1% larger than 843 sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the 844 compressed buffer. 845 This function can be used to compress a whole file at once if the 846 input file is mmap'ed. 847 compress returns Z_OK if success, Z_MEM_ERROR if there was not 848 enough memory, Z_BUF_ERROR if there was not enough room in the output 849 buffer. 850*/ 851 852extern int EXPORT uncompress OF((Bytef *dest, uLongf *destLen, 853 const Bytef *source, uLong sourceLen)); 854/* 855 Decompresses the source buffer into the destination buffer. sourceLen is 856 the byte length of the source buffer. Upon entry, destLen is the total 857 size of the destination buffer, which must be large enough to hold the 858 entire uncompressed data. (The size of the uncompressed data must have 859 been saved previously by the compressor and transmitted to the decompressor 860 by some mechanism outside the scope of this compression library.) 861 Upon exit, destLen is the actual size of the compressed buffer. 862 This function can be used to decompress a whole file at once if the 863 input file is mmap'ed. 864 865 uncompress returns Z_OK if success, Z_MEM_ERROR if there was not 866 enough memory, Z_BUF_ERROR if there was not enough room in the output 867 buffer, or Z_DATA_ERROR if the input data was corrupted. 868*/ 869 870 871typedef voidp gzFile; 872 873extern gzFile EXPORT gzopen OF((const char *path, const char *mode)); 874/* 875 Opens a gzip (.gz) file for reading or writing. The mode parameter 876 is as in fopen ("rb" or "wb") but can also include a compression level 877 ("wb9"). gzopen can be used to read a file which is not in gzip format; 878 in this case gzread will directly read from the file without decompression. 879 gzopen returns NULL if the file could not be opened or if there was 880 insufficient memory to allocate the (de)compression state; errno 881 can be checked to distinguish the two cases (if errno is zero, the 882 zlib error is Z_MEM_ERROR). 883*/ 884 885extern gzFile EXPORT gzdopen OF((int fd, const char *mode)); 886/* 887 gzdopen() associates a gzFile with the file descriptor fd. File 888 descriptors are obtained from calls like open, dup, creat, pipe or 889 fileno (in the file has been previously opened with fopen). 890 The mode parameter is as in gzopen. 891 The next call of gzclose on the returned gzFile will also close the 892 file descriptor fd, just like fclose(fdopen(fd), mode) closes the file 893 descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode). 894 gzdopen returns NULL if there was insufficient memory to allocate 895 the (de)compression state. 896*/ 897 898extern int EXPORT gzread OF((gzFile file, voidp buf, unsigned len)); 899/* 900 Reads the given number of uncompressed bytes from the compressed file. 901 If the input file was not in gzip format, gzread copies the given number 902 of bytes into the buffer. 903 gzread returns the number of uncompressed bytes actually read (0 for 904 end of file, -1 for error). */ 905 906extern int EXPORT gzwrite OF((gzFile file, const voidp buf, unsigned len)); 907/* 908 Writes the given number of uncompressed bytes into the compressed file. 909 gzwrite returns the number of uncompressed bytes actually written 910 (0 in case of error). 911*/ 912 913extern int EXPORT gzflush OF((gzFile file, int flush)); 914/* 915 Flushes all pending output into the compressed file. The parameter 916 flush is as in the deflate() function. The return value is the zlib 917 error number (see function gzerror below). gzflush returns Z_OK if 918 the flush parameter is Z_FINISH and all output could be flushed. 919 gzflush should be called only when strictly necessary because it can 920 degrade compression. 921*/ 922 923extern int EXPORT gzclose OF((gzFile file)); 924/* 925 Flushes all pending output if necessary, closes the compressed file 926 and deallocates all the (de)compression state. The return value is the zlib 927 error number (see function gzerror below). 928*/ 929 930extern const char * EXPORT gzerror OF((gzFile file, int *errnum)); 931/* 932 Returns the error message for the last error which occurred on the 933 given compressed file. errnum is set to zlib error number. If an 934 error occurred in the filesystem and not in the compression library, 935 errnum is set to Z_ERRNO and the application may consult errno 936 to get the exact error code. 937*/ 938 939 /* checksum functions */ 940 941/* 942 These functions are not related to compression but are exported 943 anyway because they might be useful in applications using the 944 compression library. 945*/ 946 947extern uLong EXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); 948 949/* 950 Update a running Adler-32 checksum with the bytes buf[0..len-1] and 951 return the updated checksum. If buf is NULL, this function returns 952 the required initial value for the checksum. 953 An Adler-32 checksum is almost as reliable as a CRC32 but can be computed 954 much faster. Usage example: 955 956 uLong adler = adler32(0L, Z_NULL, 0); 957 958 while (read_buffer(buffer, length) != EOF) { 959 adler = adler32(adler, buffer, length); 960 } 961 if (adler != original_adler) error(); 962*/ 963 964#if 0 965extern uLong EXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); 966/* 967 Update a running crc with the bytes buf[0..len-1] and return the updated 968 crc. If buf is NULL, this function returns the required initial value 969 for the crc. Pre- and post-conditioning (one's complement) is performed 970 within this function so it shouldn't be done by the application. 971 Usage example: 972 973 uLong crc = crc32(0L, Z_NULL, 0); 974 975 while (read_buffer(buffer, length) != EOF) { 976 crc = crc32(crc, buffer, length); 977 } 978 if (crc != original_crc) error(); 979*/ 980#endif 981 982 983 /* various hacks, don't look :) */ 984 985/* deflateInit and inflateInit are macros to allow checking the zlib version 986 * and the compiler's view of z_stream: 987 */ 988extern int EXPORT deflateInit_ OF((z_streamp strm, int level, 989 const char *version, int stream_size)); 990extern int EXPORT inflateInit_ OF((z_streamp strm, 991 const char *version, int stream_size)); 992extern int EXPORT deflateInit2_ OF((z_streamp strm, int level, int method, 993 int windowBits, int memLevel, int strategy, 994 const char *version, int stream_size)); 995extern int EXPORT inflateInit2_ OF((z_streamp strm, int windowBits, 996 const char *version, int stream_size)); 997#define deflateInit(strm, level) \ 998 deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream)) 999#define inflateInit(strm) \ 1000 inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream)) 1001#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ 1002 deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ 1003 (strategy), ZLIB_VERSION, sizeof(z_stream)) 1004#define inflateInit2(strm, windowBits) \ 1005 inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream)) 1006 1007#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL) 1008 struct internal_state {int dummy;}; /* hack for buggy compilers */ 1009#endif 1010 1011uLongf *get_crc_table OF((void)); /* can be used by asm versions of crc32() */ 1012 1013#ifdef _KERNEL 1014struct vnode; 1015extern gzFile gz_open OF((const char *path, const char *mode, 1016 struct vnode *vp)); 1017#endif 1018 1019 1020#ifdef __cplusplus 1021} 1022#endif 1023 1024#endif /* _ZLIB_H */ 1025/* --- zlib.h */ 1026