Wei Chang Shen / DMemWin

Dependencies:   emwin_lib

Fork of DMemWin by Embedded Artists

png/zlib.h@4:20387dbf7ecf, 2016-06-02 (annotated)

Committer:
destinyXfate
Date:
Thu Jun 02 04:55:08 2016 +0000
Revision:
4:20387dbf7ecf
Parent:
2:0e2ef1edf01b 
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destinyXfate 2:0e2ef1edf01b 1 /* zlib.h -- interface of the 'zlib' general purpose compression library
destinyXfate 2:0e2ef1edf01b 2 version 1.2.3, July 18th, 2005
destinyXfate 2:0e2ef1edf01b 3
destinyXfate 2:0e2ef1edf01b 4 Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
destinyXfate 2:0e2ef1edf01b 5
destinyXfate 2:0e2ef1edf01b 6 This software is provided 'as-is', without any express or implied
destinyXfate 2:0e2ef1edf01b 7 warranty. In no event will the authors be held liable for any damages
destinyXfate 2:0e2ef1edf01b 8 arising from the use of this software.
destinyXfate 2:0e2ef1edf01b 9
destinyXfate 2:0e2ef1edf01b 10 Permission is granted to anyone to use this software for any purpose,
destinyXfate 2:0e2ef1edf01b 11 including commercial applications, and to alter it and redistribute it
destinyXfate 2:0e2ef1edf01b 12 freely, subject to the following restrictions:
destinyXfate 2:0e2ef1edf01b 13
destinyXfate 2:0e2ef1edf01b 14 1. The origin of this software must not be misrepresented; you must not
destinyXfate 2:0e2ef1edf01b 15 claim that you wrote the original software. If you use this software
destinyXfate 2:0e2ef1edf01b 16 in a product, an acknowledgment in the product documentation would be
destinyXfate 2:0e2ef1edf01b 17 appreciated but is not required.
destinyXfate 2:0e2ef1edf01b 18 2. Altered source versions must be plainly marked as such, and must not be
destinyXfate 2:0e2ef1edf01b 19 misrepresented as being the original software.
destinyXfate 2:0e2ef1edf01b 20 3. This notice may not be removed or altered from any source distribution.
destinyXfate 2:0e2ef1edf01b 21
destinyXfate 2:0e2ef1edf01b 22 Jean-loup Gailly Mark Adler
destinyXfate 2:0e2ef1edf01b 23 jloup@gzip.org madler@alumni.caltech.edu
destinyXfate 2:0e2ef1edf01b 24
destinyXfate 2:0e2ef1edf01b 25
destinyXfate 2:0e2ef1edf01b 26 The data format used by the zlib library is described by RFCs (Request for
destinyXfate 2:0e2ef1edf01b 27 Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
destinyXfate 2:0e2ef1edf01b 28 (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
destinyXfate 2:0e2ef1edf01b 29 */
destinyXfate 2:0e2ef1edf01b 30
destinyXfate 2:0e2ef1edf01b 31 #ifndef ZLIB_H
destinyXfate 2:0e2ef1edf01b 32 #define ZLIB_H
destinyXfate 2:0e2ef1edf01b 33
destinyXfate 2:0e2ef1edf01b 34 #include "zconf.h"
destinyXfate 2:0e2ef1edf01b 35
destinyXfate 2:0e2ef1edf01b 36 #ifdef __cplusplus
destinyXfate 2:0e2ef1edf01b 37 extern "C" {
destinyXfate 2:0e2ef1edf01b 38 #endif
destinyXfate 2:0e2ef1edf01b 39
destinyXfate 2:0e2ef1edf01b 40 #define ZLIB_VERSION "1.2.3"
destinyXfate 2:0e2ef1edf01b 41 #define ZLIB_VERNUM 0x1230
destinyXfate 2:0e2ef1edf01b 42
destinyXfate 2:0e2ef1edf01b 43 /*
destinyXfate 2:0e2ef1edf01b 44 The 'zlib' compression library provides in-memory compression and
destinyXfate 2:0e2ef1edf01b 45 decompression functions, including integrity checks of the uncompressed
destinyXfate 2:0e2ef1edf01b 46 data. This version of the library supports only one compression method
destinyXfate 2:0e2ef1edf01b 47 (deflation) but other algorithms will be added later and will have the same
destinyXfate 2:0e2ef1edf01b 48 stream interface.
destinyXfate 2:0e2ef1edf01b 49
destinyXfate 2:0e2ef1edf01b 50 Compression can be done in a single step if the buffers are large
destinyXfate 2:0e2ef1edf01b 51 enough (for example if an input file is mmap'ed), or can be done by
destinyXfate 2:0e2ef1edf01b 52 repeated calls of the compression function. In the latter case, the
destinyXfate 2:0e2ef1edf01b 53 application must provide more input and/or consume the output
destinyXfate 2:0e2ef1edf01b 54 (providing more output space) before each call.
destinyXfate 2:0e2ef1edf01b 55
destinyXfate 2:0e2ef1edf01b 56 The compressed data format used by default by the in-memory functions is
destinyXfate 2:0e2ef1edf01b 57 the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
destinyXfate 2:0e2ef1edf01b 58 around a deflate stream, which is itself documented in RFC 1951.
destinyXfate 2:0e2ef1edf01b 59
destinyXfate 2:0e2ef1edf01b 60 The library also supports reading and writing files in gzip (.gz) format
destinyXfate 2:0e2ef1edf01b 61 with an interface similar to that of stdio using the functions that start
destinyXfate 2:0e2ef1edf01b 62 with "gz". The gzip format is different from the zlib format. gzip is a
destinyXfate 2:0e2ef1edf01b 63 gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
destinyXfate 2:0e2ef1edf01b 64
destinyXfate 2:0e2ef1edf01b 65 This library can optionally read and write gzip streams in memory as well.
destinyXfate 2:0e2ef1edf01b 66
destinyXfate 2:0e2ef1edf01b 67 The zlib format was designed to be compact and fast for use in memory
destinyXfate 2:0e2ef1edf01b 68 and on communications channels. The gzip format was designed for single-
destinyXfate 2:0e2ef1edf01b 69 file compression on file systems, has a larger header than zlib to maintain
destinyXfate 2:0e2ef1edf01b 70 directory information, and uses a different, slower check method than zlib.
destinyXfate 2:0e2ef1edf01b 71
destinyXfate 2:0e2ef1edf01b 72 The library does not install any signal handler. The decoder checks
destinyXfate 2:0e2ef1edf01b 73 the consistency of the compressed data, so the library should never
destinyXfate 2:0e2ef1edf01b 74 crash even in case of corrupted input.
destinyXfate 2:0e2ef1edf01b 75 */
destinyXfate 2:0e2ef1edf01b 76
destinyXfate 2:0e2ef1edf01b 77 typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
destinyXfate 2:0e2ef1edf01b 78 typedef void (*free_func) OF((voidpf opaque, voidpf address));
destinyXfate 2:0e2ef1edf01b 79
destinyXfate 2:0e2ef1edf01b 80 struct internal_state;
destinyXfate 2:0e2ef1edf01b 81
destinyXfate 2:0e2ef1edf01b 82 typedef struct z_stream_s {
destinyXfate 2:0e2ef1edf01b 83 Bytef *next_in; /* next input byte */
destinyXfate 2:0e2ef1edf01b 84 uInt avail_in; /* number of bytes available at next_in */
destinyXfate 2:0e2ef1edf01b 85 uLong total_in; /* total nb of input bytes read so far */
destinyXfate 2:0e2ef1edf01b 86
destinyXfate 2:0e2ef1edf01b 87 Bytef *next_out; /* next output byte should be put there */
destinyXfate 2:0e2ef1edf01b 88 uInt avail_out; /* remaining free space at next_out */
destinyXfate 2:0e2ef1edf01b 89 uLong total_out; /* total nb of bytes output so far */
destinyXfate 2:0e2ef1edf01b 90
destinyXfate 2:0e2ef1edf01b 91 char *msg; /* last error message, NULL if no error */
destinyXfate 2:0e2ef1edf01b 92 struct internal_state FAR *state; /* not visible by applications */
destinyXfate 2:0e2ef1edf01b 93
destinyXfate 2:0e2ef1edf01b 94 alloc_func zalloc; /* used to allocate the internal state */
destinyXfate 2:0e2ef1edf01b 95 free_func zfree; /* used to free the internal state */
destinyXfate 2:0e2ef1edf01b 96 voidpf opaque; /* private data object passed to zalloc and zfree */
destinyXfate 2:0e2ef1edf01b 97
destinyXfate 2:0e2ef1edf01b 98 int data_type; /* best guess about the data type: binary or text */
destinyXfate 2:0e2ef1edf01b 99 uLong adler; /* adler32 value of the uncompressed data */
destinyXfate 2:0e2ef1edf01b 100 uLong reserved; /* reserved for future use */
destinyXfate 2:0e2ef1edf01b 101 } z_stream;
destinyXfate 2:0e2ef1edf01b 102
destinyXfate 2:0e2ef1edf01b 103 typedef z_stream FAR *z_streamp;
destinyXfate 2:0e2ef1edf01b 104
destinyXfate 2:0e2ef1edf01b 105 /*
destinyXfate 2:0e2ef1edf01b 106 gzip header information passed to and from zlib routines. See RFC 1952
destinyXfate 2:0e2ef1edf01b 107 for more details on the meanings of these fields.
destinyXfate 2:0e2ef1edf01b 108 */
destinyXfate 2:0e2ef1edf01b 109 typedef struct gz_header_s {
destinyXfate 2:0e2ef1edf01b 110 int text; /* true if compressed data believed to be text */
destinyXfate 2:0e2ef1edf01b 111 uLong time; /* modification time */
destinyXfate 2:0e2ef1edf01b 112 int xflags; /* extra flags (not used when writing a gzip file) */
destinyXfate 2:0e2ef1edf01b 113 int os; /* operating system */
destinyXfate 2:0e2ef1edf01b 114 Bytef *extra; /* pointer to extra field or Z_NULL if none */
destinyXfate 2:0e2ef1edf01b 115 uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
destinyXfate 2:0e2ef1edf01b 116 uInt extra_max; /* space at extra (only when reading header) */
destinyXfate 2:0e2ef1edf01b 117 Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
destinyXfate 2:0e2ef1edf01b 118 uInt name_max; /* space at name (only when reading header) */
destinyXfate 2:0e2ef1edf01b 119 Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
destinyXfate 2:0e2ef1edf01b 120 uInt comm_max; /* space at comment (only when reading header) */
destinyXfate 2:0e2ef1edf01b 121 int hcrc; /* true if there was or will be a header crc */
destinyXfate 2:0e2ef1edf01b 122 int done; /* true when done reading gzip header (not used
destinyXfate 2:0e2ef1edf01b 123 when writing a gzip file) */
destinyXfate 2:0e2ef1edf01b 124 } gz_header;
destinyXfate 2:0e2ef1edf01b 125
destinyXfate 2:0e2ef1edf01b 126 typedef gz_header FAR *gz_headerp;
destinyXfate 2:0e2ef1edf01b 127
destinyXfate 2:0e2ef1edf01b 128 /*
destinyXfate 2:0e2ef1edf01b 129 The application must update next_in and avail_in when avail_in has
destinyXfate 2:0e2ef1edf01b 130 dropped to zero. It must update next_out and avail_out when avail_out
destinyXfate 2:0e2ef1edf01b 131 has dropped to zero. The application must initialize zalloc, zfree and
destinyXfate 2:0e2ef1edf01b 132 opaque before calling the init function. All other fields are set by the
destinyXfate 2:0e2ef1edf01b 133 compression library and must not be updated by the application.
destinyXfate 2:0e2ef1edf01b 134
destinyXfate 2:0e2ef1edf01b 135 The opaque value provided by the application will be passed as the first
destinyXfate 2:0e2ef1edf01b 136 parameter for calls of zalloc and zfree. This can be useful for custom
destinyXfate 2:0e2ef1edf01b 137 memory management. The compression library attaches no meaning to the
destinyXfate 2:0e2ef1edf01b 138 opaque value.
destinyXfate 2:0e2ef1edf01b 139
destinyXfate 2:0e2ef1edf01b 140 zalloc must return Z_NULL if there is not enough memory for the object.
destinyXfate 2:0e2ef1edf01b 141 If zlib is used in a multi-threaded application, zalloc and zfree must be
destinyXfate 2:0e2ef1edf01b 142 thread safe.
destinyXfate 2:0e2ef1edf01b 143
destinyXfate 2:0e2ef1edf01b 144 On 16-bit systems, the functions zalloc and zfree must be able to allocate
destinyXfate 2:0e2ef1edf01b 145 exactly 65536 bytes, but will not be required to allocate more than this
destinyXfate 2:0e2ef1edf01b 146 if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
destinyXfate 2:0e2ef1edf01b 147 pointers returned by zalloc for objects of exactly 65536 bytes *must*
destinyXfate 2:0e2ef1edf01b 148 have their offset normalized to zero. The default allocation function
destinyXfate 2:0e2ef1edf01b 149 provided by this library ensures this (see zutil.c). To reduce memory
destinyXfate 2:0e2ef1edf01b 150 requirements and avoid any allocation of 64K objects, at the expense of
destinyXfate 2:0e2ef1edf01b 151 compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
destinyXfate 2:0e2ef1edf01b 152
destinyXfate 2:0e2ef1edf01b 153 The fields total_in and total_out can be used for statistics or
destinyXfate 2:0e2ef1edf01b 154 progress reports. After compression, total_in holds the total size of
destinyXfate 2:0e2ef1edf01b 155 the uncompressed data and may be saved for use in the decompressor
destinyXfate 2:0e2ef1edf01b 156 (particularly if the decompressor wants to decompress everything in
destinyXfate 2:0e2ef1edf01b 157 a single step).
destinyXfate 2:0e2ef1edf01b 158 */
destinyXfate 2:0e2ef1edf01b 159
destinyXfate 2:0e2ef1edf01b 160 /* constants */
destinyXfate 2:0e2ef1edf01b 161
destinyXfate 2:0e2ef1edf01b 162 #define Z_NO_FLUSH 0
destinyXfate 2:0e2ef1edf01b 163 #define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
destinyXfate 2:0e2ef1edf01b 164 #define Z_SYNC_FLUSH 2
destinyXfate 2:0e2ef1edf01b 165 #define Z_FULL_FLUSH 3
destinyXfate 2:0e2ef1edf01b 166 #define Z_FINISH 4
destinyXfate 2:0e2ef1edf01b 167 #define Z_BLOCK 5
destinyXfate 2:0e2ef1edf01b 168 /* Allowed flush values; see deflate() and inflate() below for details */
destinyXfate 2:0e2ef1edf01b 169
destinyXfate 2:0e2ef1edf01b 170 #define Z_OK 0
destinyXfate 2:0e2ef1edf01b 171 #define Z_STREAM_END 1
destinyXfate 2:0e2ef1edf01b 172 #define Z_NEED_DICT 2
destinyXfate 2:0e2ef1edf01b 173 #define Z_ERRNO (-1)
destinyXfate 2:0e2ef1edf01b 174 #define Z_STREAM_ERROR (-2)
destinyXfate 2:0e2ef1edf01b 175 #define Z_DATA_ERROR (-3)
destinyXfate 2:0e2ef1edf01b 176 #define Z_MEM_ERROR (-4)
destinyXfate 2:0e2ef1edf01b 177 #define Z_BUF_ERROR (-5)
destinyXfate 2:0e2ef1edf01b 178 #define Z_VERSION_ERROR (-6)
destinyXfate 2:0e2ef1edf01b 179 /* Return codes for the compression/decompression functions. Negative
destinyXfate 2:0e2ef1edf01b 180 * values are errors, positive values are used for special but normal events.
destinyXfate 2:0e2ef1edf01b 181 */
destinyXfate 2:0e2ef1edf01b 182
destinyXfate 2:0e2ef1edf01b 183 #define Z_NO_COMPRESSION 0
destinyXfate 2:0e2ef1edf01b 184 #define Z_BEST_SPEED 1
destinyXfate 2:0e2ef1edf01b 185 #define Z_BEST_COMPRESSION 9
destinyXfate 2:0e2ef1edf01b 186 #define Z_DEFAULT_COMPRESSION (-1)
destinyXfate 2:0e2ef1edf01b 187 /* compression levels */
destinyXfate 2:0e2ef1edf01b 188
destinyXfate 2:0e2ef1edf01b 189 #define Z_FILTERED 1
destinyXfate 2:0e2ef1edf01b 190 #define Z_HUFFMAN_ONLY 2
destinyXfate 2:0e2ef1edf01b 191 #define Z_RLE 3
destinyXfate 2:0e2ef1edf01b 192 #define Z_FIXED 4
destinyXfate 2:0e2ef1edf01b 193 #define Z_DEFAULT_STRATEGY 0
destinyXfate 2:0e2ef1edf01b 194 /* compression strategy; see deflateInit2() below for details */
destinyXfate 2:0e2ef1edf01b 195
destinyXfate 2:0e2ef1edf01b 196 #define Z_BINARY 0
destinyXfate 2:0e2ef1edf01b 197 #define Z_TEXT 1
destinyXfate 2:0e2ef1edf01b 198 #define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
destinyXfate 2:0e2ef1edf01b 199 #define Z_UNKNOWN 2
destinyXfate 2:0e2ef1edf01b 200 /* Possible values of the data_type field (though see inflate()) */
destinyXfate 2:0e2ef1edf01b 201
destinyXfate 2:0e2ef1edf01b 202 #define Z_DEFLATED 8
destinyXfate 2:0e2ef1edf01b 203 /* The deflate compression method (the only one supported in this version) */
destinyXfate 2:0e2ef1edf01b 204
destinyXfate 2:0e2ef1edf01b 205 #define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
destinyXfate 2:0e2ef1edf01b 206
destinyXfate 2:0e2ef1edf01b 207 #define zlib_version zlibVersion()
destinyXfate 2:0e2ef1edf01b 208 /* for compatibility with versions < 1.0.2 */
destinyXfate 2:0e2ef1edf01b 209
destinyXfate 2:0e2ef1edf01b 210 /* basic functions */
destinyXfate 2:0e2ef1edf01b 211
destinyXfate 2:0e2ef1edf01b 212 ZEXTERN const char * ZEXPORT zlibVersion OF((void));
destinyXfate 2:0e2ef1edf01b 213 /* The application can compare zlibVersion and ZLIB_VERSION for consistency.
destinyXfate 2:0e2ef1edf01b 214 If the first character differs, the library code actually used is
destinyXfate 2:0e2ef1edf01b 215 not compatible with the zlib.h header file used by the application.
destinyXfate 2:0e2ef1edf01b 216 This check is automatically made by deflateInit and inflateInit.
destinyXfate 2:0e2ef1edf01b 217 */
destinyXfate 2:0e2ef1edf01b 218
destinyXfate 2:0e2ef1edf01b 219 /*
destinyXfate 2:0e2ef1edf01b 220 ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
destinyXfate 2:0e2ef1edf01b 221
destinyXfate 2:0e2ef1edf01b 222 Initializes the internal stream state for compression. The fields
destinyXfate 2:0e2ef1edf01b 223 zalloc, zfree and opaque must be initialized before by the caller.
destinyXfate 2:0e2ef1edf01b 224 If zalloc and zfree are set to Z_NULL, deflateInit updates them to
destinyXfate 2:0e2ef1edf01b 225 use default allocation functions.
destinyXfate 2:0e2ef1edf01b 226
destinyXfate 2:0e2ef1edf01b 227 The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
destinyXfate 2:0e2ef1edf01b 228 1 gives best speed, 9 gives best compression, 0 gives no compression at
destinyXfate 2:0e2ef1edf01b 229 all (the input data is simply copied a block at a time).
destinyXfate 2:0e2ef1edf01b 230 Z_DEFAULT_COMPRESSION requests a default compromise between speed and
destinyXfate 2:0e2ef1edf01b 231 compression (currently equivalent to level 6).
destinyXfate 2:0e2ef1edf01b 232
destinyXfate 2:0e2ef1edf01b 233 deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
destinyXfate 2:0e2ef1edf01b 234 enough memory, Z_STREAM_ERROR if level is not a valid compression level,
destinyXfate 2:0e2ef1edf01b 235 Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
destinyXfate 2:0e2ef1edf01b 236 with the version assumed by the caller (ZLIB_VERSION).
destinyXfate 2:0e2ef1edf01b 237 msg is set to null if there is no error message. deflateInit does not
destinyXfate 2:0e2ef1edf01b 238 perform any compression: this will be done by deflate().
destinyXfate 2:0e2ef1edf01b 239 */
destinyXfate 2:0e2ef1edf01b 240
destinyXfate 2:0e2ef1edf01b 241
destinyXfate 2:0e2ef1edf01b 242 ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
destinyXfate 2:0e2ef1edf01b 243 /*
destinyXfate 2:0e2ef1edf01b 244 deflate compresses as much data as possible, and stops when the input
destinyXfate 2:0e2ef1edf01b 245 buffer becomes empty or the output buffer becomes full. It may introduce some
destinyXfate 2:0e2ef1edf01b 246 output latency (reading input without producing any output) except when
destinyXfate 2:0e2ef1edf01b 247 forced to flush.
destinyXfate 2:0e2ef1edf01b 248
destinyXfate 2:0e2ef1edf01b 249 The detailed semantics are as follows. deflate performs one or both of the
destinyXfate 2:0e2ef1edf01b 250 following actions:
destinyXfate 2:0e2ef1edf01b 251
destinyXfate 2:0e2ef1edf01b 252 - Compress more input starting at next_in and update next_in and avail_in
destinyXfate 2:0e2ef1edf01b 253 accordingly. If not all input can be processed (because there is not
destinyXfate 2:0e2ef1edf01b 254 enough room in the output buffer), next_in and avail_in are updated and
destinyXfate 2:0e2ef1edf01b 255 processing will resume at this point for the next call of deflate().
destinyXfate 2:0e2ef1edf01b 256
destinyXfate 2:0e2ef1edf01b 257 - Provide more output starting at next_out and update next_out and avail_out
destinyXfate 2:0e2ef1edf01b 258 accordingly. This action is forced if the parameter flush is non zero.
destinyXfate 2:0e2ef1edf01b 259 Forcing flush frequently degrades the compression ratio, so this parameter
destinyXfate 2:0e2ef1edf01b 260 should be set only when necessary (in interactive applications).
destinyXfate 2:0e2ef1edf01b 261 Some output may be provided even if flush is not set.
destinyXfate 2:0e2ef1edf01b 262
destinyXfate 2:0e2ef1edf01b 263 Before the call of deflate(), the application should ensure that at least
destinyXfate 2:0e2ef1edf01b 264 one of the actions is possible, by providing more input and/or consuming
destinyXfate 2:0e2ef1edf01b 265 more output, and updating avail_in or avail_out accordingly; avail_out
destinyXfate 2:0e2ef1edf01b 266 should never be zero before the call. The application can consume the
destinyXfate 2:0e2ef1edf01b 267 compressed output when it wants, for example when the output buffer is full
destinyXfate 2:0e2ef1edf01b 268 (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
destinyXfate 2:0e2ef1edf01b 269 and with zero avail_out, it must be called again after making room in the
destinyXfate 2:0e2ef1edf01b 270 output buffer because there might be more output pending.
destinyXfate 2:0e2ef1edf01b 271
destinyXfate 2:0e2ef1edf01b 272 Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
destinyXfate 2:0e2ef1edf01b 273 decide how much data to accumualte before producing output, in order to
destinyXfate 2:0e2ef1edf01b 274 maximize compression.
destinyXfate 2:0e2ef1edf01b 275
destinyXfate 2:0e2ef1edf01b 276 If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
destinyXfate 2:0e2ef1edf01b 277 flushed to the output buffer and the output is aligned on a byte boundary, so
destinyXfate 2:0e2ef1edf01b 278 that the decompressor can get all input data available so far. (In particular
destinyXfate 2:0e2ef1edf01b 279 avail_in is zero after the call if enough output space has been provided
destinyXfate 2:0e2ef1edf01b 280 before the call.) Flushing may degrade compression for some compression
destinyXfate 2:0e2ef1edf01b 281 algorithms and so it should be used only when necessary.
destinyXfate 2:0e2ef1edf01b 282
destinyXfate 2:0e2ef1edf01b 283 If flush is set to Z_FULL_FLUSH, all output is flushed as with
destinyXfate 2:0e2ef1edf01b 284 Z_SYNC_FLUSH, and the compression state is reset so that decompression can
destinyXfate 2:0e2ef1edf01b 285 restart from this point if previous compressed data has been damaged or if
destinyXfate 2:0e2ef1edf01b 286 random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
destinyXfate 2:0e2ef1edf01b 287 compression.
destinyXfate 2:0e2ef1edf01b 288
destinyXfate 2:0e2ef1edf01b 289 If deflate returns with avail_out == 0, this function must be called again
destinyXfate 2:0e2ef1edf01b 290 with the same value of the flush parameter and more output space (updated
destinyXfate 2:0e2ef1edf01b 291 avail_out), until the flush is complete (deflate returns with non-zero
destinyXfate 2:0e2ef1edf01b 292 avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
destinyXfate 2:0e2ef1edf01b 293 avail_out is greater than six to avoid repeated flush markers due to
destinyXfate 2:0e2ef1edf01b 294 avail_out == 0 on return.
destinyXfate 2:0e2ef1edf01b 295
destinyXfate 2:0e2ef1edf01b 296 If the parameter flush is set to Z_FINISH, pending input is processed,
destinyXfate 2:0e2ef1edf01b 297 pending output is flushed and deflate returns with Z_STREAM_END if there
destinyXfate 2:0e2ef1edf01b 298 was enough output space; if deflate returns with Z_OK, this function must be
destinyXfate 2:0e2ef1edf01b 299 called again with Z_FINISH and more output space (updated avail_out) but no
destinyXfate 2:0e2ef1edf01b 300 more input data, until it returns with Z_STREAM_END or an error. After
destinyXfate 2:0e2ef1edf01b 301 deflate has returned Z_STREAM_END, the only possible operations on the
destinyXfate 2:0e2ef1edf01b 302 stream are deflateReset or deflateEnd.
destinyXfate 2:0e2ef1edf01b 303
destinyXfate 2:0e2ef1edf01b 304 Z_FINISH can be used immediately after deflateInit if all the compression
destinyXfate 2:0e2ef1edf01b 305 is to be done in a single step. In this case, avail_out must be at least
destinyXfate 2:0e2ef1edf01b 306 the value returned by deflateBound (see below). If deflate does not return
destinyXfate 2:0e2ef1edf01b 307 Z_STREAM_END, then it must be called again as described above.
destinyXfate 2:0e2ef1edf01b 308
destinyXfate 2:0e2ef1edf01b 309 deflate() sets strm->adler to the adler32 checksum of all input read
destinyXfate 2:0e2ef1edf01b 310 so far (that is, total_in bytes).
destinyXfate 2:0e2ef1edf01b 311
destinyXfate 2:0e2ef1edf01b 312 deflate() may update strm->data_type if it can make a good guess about
destinyXfate 2:0e2ef1edf01b 313 the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
destinyXfate 2:0e2ef1edf01b 314 binary. This field is only for information purposes and does not affect
destinyXfate 2:0e2ef1edf01b 315 the compression algorithm in any manner.
destinyXfate 2:0e2ef1edf01b 316
destinyXfate 2:0e2ef1edf01b 317 deflate() returns Z_OK if some progress has been made (more input
destinyXfate 2:0e2ef1edf01b 318 processed or more output produced), Z_STREAM_END if all input has been
destinyXfate 2:0e2ef1edf01b 319 consumed and all output has been produced (only when flush is set to
destinyXfate 2:0e2ef1edf01b 320 Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
destinyXfate 2:0e2ef1edf01b 321 if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
destinyXfate 2:0e2ef1edf01b 322 (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
destinyXfate 2:0e2ef1edf01b 323 fatal, and deflate() can be called again with more input and more output
destinyXfate 2:0e2ef1edf01b 324 space to continue compressing.
destinyXfate 2:0e2ef1edf01b 325 */
destinyXfate 2:0e2ef1edf01b 326
destinyXfate 2:0e2ef1edf01b 327
destinyXfate 2:0e2ef1edf01b 328 ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 329 /*
destinyXfate 2:0e2ef1edf01b 330 All dynamically allocated data structures for this stream are freed.
destinyXfate 2:0e2ef1edf01b 331 This function discards any unprocessed input and does not flush any
destinyXfate 2:0e2ef1edf01b 332 pending output.
destinyXfate 2:0e2ef1edf01b 333
destinyXfate 2:0e2ef1edf01b 334 deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
destinyXfate 2:0e2ef1edf01b 335 stream state was inconsistent, Z_DATA_ERROR if the stream was freed
destinyXfate 2:0e2ef1edf01b 336 prematurely (some input or output was discarded). In the error case,
destinyXfate 2:0e2ef1edf01b 337 msg may be set but then points to a static string (which must not be
destinyXfate 2:0e2ef1edf01b 338 deallocated).
destinyXfate 2:0e2ef1edf01b 339 */
destinyXfate 2:0e2ef1edf01b 340
destinyXfate 2:0e2ef1edf01b 341
destinyXfate 2:0e2ef1edf01b 342 /*
destinyXfate 2:0e2ef1edf01b 343 ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 344
destinyXfate 2:0e2ef1edf01b 345 Initializes the internal stream state for decompression. The fields
destinyXfate 2:0e2ef1edf01b 346 next_in, avail_in, zalloc, zfree and opaque must be initialized before by
destinyXfate 2:0e2ef1edf01b 347 the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
destinyXfate 2:0e2ef1edf01b 348 value depends on the compression method), inflateInit determines the
destinyXfate 2:0e2ef1edf01b 349 compression method from the zlib header and allocates all data structures
destinyXfate 2:0e2ef1edf01b 350 accordingly; otherwise the allocation will be deferred to the first call of
destinyXfate 2:0e2ef1edf01b 351 inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
destinyXfate 2:0e2ef1edf01b 352 use default allocation functions.
destinyXfate 2:0e2ef1edf01b 353
destinyXfate 2:0e2ef1edf01b 354 inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
destinyXfate 2:0e2ef1edf01b 355 memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
destinyXfate 2:0e2ef1edf01b 356 version assumed by the caller. msg is set to null if there is no error
destinyXfate 2:0e2ef1edf01b 357 message. inflateInit does not perform any decompression apart from reading
destinyXfate 2:0e2ef1edf01b 358 the zlib header if present: this will be done by inflate(). (So next_in and
destinyXfate 2:0e2ef1edf01b 359 avail_in may be modified, but next_out and avail_out are unchanged.)
destinyXfate 2:0e2ef1edf01b 360 */
destinyXfate 2:0e2ef1edf01b 361
destinyXfate 2:0e2ef1edf01b 362
destinyXfate 2:0e2ef1edf01b 363 ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
destinyXfate 2:0e2ef1edf01b 364 /*
destinyXfate 2:0e2ef1edf01b 365 inflate decompresses as much data as possible, and stops when the input
destinyXfate 2:0e2ef1edf01b 366 buffer becomes empty or the output buffer becomes full. It may introduce
destinyXfate 2:0e2ef1edf01b 367 some output latency (reading input without producing any output) except when
destinyXfate 2:0e2ef1edf01b 368 forced to flush.
destinyXfate 2:0e2ef1edf01b 369
destinyXfate 2:0e2ef1edf01b 370 The detailed semantics are as follows. inflate performs one or both of the
destinyXfate 2:0e2ef1edf01b 371 following actions:
destinyXfate 2:0e2ef1edf01b 372
destinyXfate 2:0e2ef1edf01b 373 - Decompress more input starting at next_in and update next_in and avail_in
destinyXfate 2:0e2ef1edf01b 374 accordingly. If not all input can be processed (because there is not
destinyXfate 2:0e2ef1edf01b 375 enough room in the output buffer), next_in is updated and processing
destinyXfate 2:0e2ef1edf01b 376 will resume at this point for the next call of inflate().
destinyXfate 2:0e2ef1edf01b 377
destinyXfate 2:0e2ef1edf01b 378 - Provide more output starting at next_out and update next_out and avail_out
destinyXfate 2:0e2ef1edf01b 379 accordingly. inflate() provides as much output as possible, until there
destinyXfate 2:0e2ef1edf01b 380 is no more input data or no more space in the output buffer (see below
destinyXfate 2:0e2ef1edf01b 381 about the flush parameter).
destinyXfate 2:0e2ef1edf01b 382
destinyXfate 2:0e2ef1edf01b 383 Before the call of inflate(), the application should ensure that at least
destinyXfate 2:0e2ef1edf01b 384 one of the actions is possible, by providing more input and/or consuming
destinyXfate 2:0e2ef1edf01b 385 more output, and updating the next_* and avail_* values accordingly.
destinyXfate 2:0e2ef1edf01b 386 The application can consume the uncompressed output when it wants, for
destinyXfate 2:0e2ef1edf01b 387 example when the output buffer is full (avail_out == 0), or after each
destinyXfate 2:0e2ef1edf01b 388 call of inflate(). If inflate returns Z_OK and with zero avail_out, it
destinyXfate 2:0e2ef1edf01b 389 must be called again after making room in the output buffer because there
destinyXfate 2:0e2ef1edf01b 390 might be more output pending.
destinyXfate 2:0e2ef1edf01b 391
destinyXfate 2:0e2ef1edf01b 392 The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
destinyXfate 2:0e2ef1edf01b 393 Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
destinyXfate 2:0e2ef1edf01b 394 output as possible to the output buffer. Z_BLOCK requests that inflate() stop
destinyXfate 2:0e2ef1edf01b 395 if and when it gets to the next deflate block boundary. When decoding the
destinyXfate 2:0e2ef1edf01b 396 zlib or gzip format, this will cause inflate() to return immediately after
destinyXfate 2:0e2ef1edf01b 397 the header and before the first block. When doing a raw inflate, inflate()
destinyXfate 2:0e2ef1edf01b 398 will go ahead and process the first block, and will return when it gets to
destinyXfate 2:0e2ef1edf01b 399 the end of that block, or when it runs out of data.
destinyXfate 2:0e2ef1edf01b 400
destinyXfate 2:0e2ef1edf01b 401 The Z_BLOCK option assists in appending to or combining deflate streams.
destinyXfate 2:0e2ef1edf01b 402 Also to assist in this, on return inflate() will set strm->data_type to the
destinyXfate 2:0e2ef1edf01b 403 number of unused bits in the last byte taken from strm->next_in, plus 64
destinyXfate 2:0e2ef1edf01b 404 if inflate() is currently decoding the last block in the deflate stream,
destinyXfate 2:0e2ef1edf01b 405 plus 128 if inflate() returned immediately after decoding an end-of-block
destinyXfate 2:0e2ef1edf01b 406 code or decoding the complete header up to just before the first byte of the
destinyXfate 2:0e2ef1edf01b 407 deflate stream. The end-of-block will not be indicated until all of the
destinyXfate 2:0e2ef1edf01b 408 uncompressed data from that block has been written to strm->next_out. The
destinyXfate 2:0e2ef1edf01b 409 number of unused bits may in general be greater than seven, except when
destinyXfate 2:0e2ef1edf01b 410 bit 7 of data_type is set, in which case the number of unused bits will be
destinyXfate 2:0e2ef1edf01b 411 less than eight.
destinyXfate 2:0e2ef1edf01b 412
destinyXfate 2:0e2ef1edf01b 413 inflate() should normally be called until it returns Z_STREAM_END or an
destinyXfate 2:0e2ef1edf01b 414 error. However if all decompression is to be performed in a single step
destinyXfate 2:0e2ef1edf01b 415 (a single call of inflate), the parameter flush should be set to
destinyXfate 2:0e2ef1edf01b 416 Z_FINISH. In this case all pending input is processed and all pending
destinyXfate 2:0e2ef1edf01b 417 output is flushed; avail_out must be large enough to hold all the
destinyXfate 2:0e2ef1edf01b 418 uncompressed data. (The size of the uncompressed data may have been saved
destinyXfate 2:0e2ef1edf01b 419 by the compressor for this purpose.) The next operation on this stream must
destinyXfate 2:0e2ef1edf01b 420 be inflateEnd to deallocate the decompression state. The use of Z_FINISH
destinyXfate 2:0e2ef1edf01b 421 is never required, but can be used to inform inflate that a faster approach
destinyXfate 2:0e2ef1edf01b 422 may be used for the single inflate() call.
destinyXfate 2:0e2ef1edf01b 423
destinyXfate 2:0e2ef1edf01b 424 In this implementation, inflate() always flushes as much output as
destinyXfate 2:0e2ef1edf01b 425 possible to the output buffer, and always uses the faster approach on the
destinyXfate 2:0e2ef1edf01b 426 first call. So the only effect of the flush parameter in this implementation
destinyXfate 2:0e2ef1edf01b 427 is on the return value of inflate(), as noted below, or when it returns early
destinyXfate 2:0e2ef1edf01b 428 because Z_BLOCK is used.
destinyXfate 2:0e2ef1edf01b 429
destinyXfate 2:0e2ef1edf01b 430 If a preset dictionary is needed after this call (see inflateSetDictionary
destinyXfate 2:0e2ef1edf01b 431 below), inflate sets strm->adler to the adler32 checksum of the dictionary
destinyXfate 2:0e2ef1edf01b 432 chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
destinyXfate 2:0e2ef1edf01b 433 strm->adler to the adler32 checksum of all output produced so far (that is,
destinyXfate 2:0e2ef1edf01b 434 total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
destinyXfate 2:0e2ef1edf01b 435 below. At the end of the stream, inflate() checks that its computed adler32
destinyXfate 2:0e2ef1edf01b 436 checksum is equal to that saved by the compressor and returns Z_STREAM_END
destinyXfate 2:0e2ef1edf01b 437 only if the checksum is correct.
destinyXfate 2:0e2ef1edf01b 438
destinyXfate 2:0e2ef1edf01b 439 inflate() will decompress and check either zlib-wrapped or gzip-wrapped
destinyXfate 2:0e2ef1edf01b 440 deflate data. The header type is detected automatically. Any information
destinyXfate 2:0e2ef1edf01b 441 contained in the gzip header is not retained, so applications that need that
destinyXfate 2:0e2ef1edf01b 442 information should instead use raw inflate, see inflateInit2() below, or
destinyXfate 2:0e2ef1edf01b 443 inflateBack() and perform their own processing of the gzip header and
destinyXfate 2:0e2ef1edf01b 444 trailer.
destinyXfate 2:0e2ef1edf01b 445
destinyXfate 2:0e2ef1edf01b 446 inflate() returns Z_OK if some progress has been made (more input processed
destinyXfate 2:0e2ef1edf01b 447 or more output produced), Z_STREAM_END if the end of the compressed data has
destinyXfate 2:0e2ef1edf01b 448 been reached and all uncompressed output has been produced, Z_NEED_DICT if a
destinyXfate 2:0e2ef1edf01b 449 preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
destinyXfate 2:0e2ef1edf01b 450 corrupted (input stream not conforming to the zlib format or incorrect check
destinyXfate 2:0e2ef1edf01b 451 value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
destinyXfate 2:0e2ef1edf01b 452 if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
destinyXfate 2:0e2ef1edf01b 453 Z_BUF_ERROR if no progress is possible or if there was not enough room in the
destinyXfate 2:0e2ef1edf01b 454 output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
destinyXfate 2:0e2ef1edf01b 455 inflate() can be called again with more input and more output space to
destinyXfate 2:0e2ef1edf01b 456 continue decompressing. If Z_DATA_ERROR is returned, the application may then
destinyXfate 2:0e2ef1edf01b 457 call inflateSync() to look for a good compression block if a partial recovery
destinyXfate 2:0e2ef1edf01b 458 of the data is desired.
destinyXfate 2:0e2ef1edf01b 459 */
destinyXfate 2:0e2ef1edf01b 460
destinyXfate 2:0e2ef1edf01b 461
destinyXfate 2:0e2ef1edf01b 462 ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 463 /*
destinyXfate 2:0e2ef1edf01b 464 All dynamically allocated data structures for this stream are freed.
destinyXfate 2:0e2ef1edf01b 465 This function discards any unprocessed input and does not flush any
destinyXfate 2:0e2ef1edf01b 466 pending output.
destinyXfate 2:0e2ef1edf01b 467
destinyXfate 2:0e2ef1edf01b 468 inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
destinyXfate 2:0e2ef1edf01b 469 was inconsistent. In the error case, msg may be set but then points to a
destinyXfate 2:0e2ef1edf01b 470 static string (which must not be deallocated).
destinyXfate 2:0e2ef1edf01b 471 */
destinyXfate 2:0e2ef1edf01b 472
destinyXfate 2:0e2ef1edf01b 473 /* Advanced functions */
destinyXfate 2:0e2ef1edf01b 474
destinyXfate 2:0e2ef1edf01b 475 /*
destinyXfate 2:0e2ef1edf01b 476 The following functions are needed only in some special applications.
destinyXfate 2:0e2ef1edf01b 477 */
destinyXfate 2:0e2ef1edf01b 478
destinyXfate 2:0e2ef1edf01b 479 /*
destinyXfate 2:0e2ef1edf01b 480 ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 481 int level,
destinyXfate 2:0e2ef1edf01b 482 int method,
destinyXfate 2:0e2ef1edf01b 483 int windowBits,
destinyXfate 2:0e2ef1edf01b 484 int memLevel,
destinyXfate 2:0e2ef1edf01b 485 int strategy));
destinyXfate 2:0e2ef1edf01b 486
destinyXfate 2:0e2ef1edf01b 487 This is another version of deflateInit with more compression options. The
destinyXfate 2:0e2ef1edf01b 488 fields next_in, zalloc, zfree and opaque must be initialized before by
destinyXfate 2:0e2ef1edf01b 489 the caller.
destinyXfate 2:0e2ef1edf01b 490
destinyXfate 2:0e2ef1edf01b 491 The method parameter is the compression method. It must be Z_DEFLATED in
destinyXfate 2:0e2ef1edf01b 492 this version of the library.
destinyXfate 2:0e2ef1edf01b 493
destinyXfate 2:0e2ef1edf01b 494 The windowBits parameter is the base two logarithm of the window size
destinyXfate 2:0e2ef1edf01b 495 (the size of the history buffer). It should be in the range 8..15 for this
destinyXfate 2:0e2ef1edf01b 496 version of the library. Larger values of this parameter result in better
destinyXfate 2:0e2ef1edf01b 497 compression at the expense of memory usage. The default value is 15 if
destinyXfate 2:0e2ef1edf01b 498 deflateInit is used instead.
destinyXfate 2:0e2ef1edf01b 499
destinyXfate 2:0e2ef1edf01b 500 windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
destinyXfate 2:0e2ef1edf01b 501 determines the window size. deflate() will then generate raw deflate data
destinyXfate 2:0e2ef1edf01b 502 with no zlib header or trailer, and will not compute an adler32 check value.
destinyXfate 2:0e2ef1edf01b 503
destinyXfate 2:0e2ef1edf01b 504 windowBits can also be greater than 15 for optional gzip encoding. Add
destinyXfate 2:0e2ef1edf01b 505 16 to windowBits to write a simple gzip header and trailer around the
destinyXfate 2:0e2ef1edf01b 506 compressed data instead of a zlib wrapper. The gzip header will have no
destinyXfate 2:0e2ef1edf01b 507 file name, no extra data, no comment, no modification time (set to zero),
destinyXfate 2:0e2ef1edf01b 508 no header crc, and the operating system will be set to 255 (unknown). If a
destinyXfate 2:0e2ef1edf01b 509 gzip stream is being written, strm->adler is a crc32 instead of an adler32.
destinyXfate 2:0e2ef1edf01b 510
destinyXfate 2:0e2ef1edf01b 511 The memLevel parameter specifies how much memory should be allocated
destinyXfate 2:0e2ef1edf01b 512 for the internal compression state. memLevel=1 uses minimum memory but
destinyXfate 2:0e2ef1edf01b 513 is slow and reduces compression ratio; memLevel=9 uses maximum memory
destinyXfate 2:0e2ef1edf01b 514 for optimal speed. The default value is 8. See zconf.h for total memory
destinyXfate 2:0e2ef1edf01b 515 usage as a function of windowBits and memLevel.
destinyXfate 2:0e2ef1edf01b 516
destinyXfate 2:0e2ef1edf01b 517 The strategy parameter is used to tune the compression algorithm. Use the
destinyXfate 2:0e2ef1edf01b 518 value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
destinyXfate 2:0e2ef1edf01b 519 filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
destinyXfate 2:0e2ef1edf01b 520 string match), or Z_RLE to limit match distances to one (run-length
destinyXfate 2:0e2ef1edf01b 521 encoding). Filtered data consists mostly of small values with a somewhat
destinyXfate 2:0e2ef1edf01b 522 random distribution. In this case, the compression algorithm is tuned to
destinyXfate 2:0e2ef1edf01b 523 compress them better. The effect of Z_FILTERED is to force more Huffman
destinyXfate 2:0e2ef1edf01b 524 coding and less string matching; it is somewhat intermediate between
destinyXfate 2:0e2ef1edf01b 525 Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
destinyXfate 2:0e2ef1edf01b 526 Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
destinyXfate 2:0e2ef1edf01b 527 parameter only affects the compression ratio but not the correctness of the
destinyXfate 2:0e2ef1edf01b 528 compressed output even if it is not set appropriately. Z_FIXED prevents the
destinyXfate 2:0e2ef1edf01b 529 use of dynamic Huffman codes, allowing for a simpler decoder for special
destinyXfate 2:0e2ef1edf01b 530 applications.
destinyXfate 2:0e2ef1edf01b 531
destinyXfate 2:0e2ef1edf01b 532 deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
destinyXfate 2:0e2ef1edf01b 533 memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
destinyXfate 2:0e2ef1edf01b 534 method). msg is set to null if there is no error message. deflateInit2 does
destinyXfate 2:0e2ef1edf01b 535 not perform any compression: this will be done by deflate().
destinyXfate 2:0e2ef1edf01b 536 */
destinyXfate 2:0e2ef1edf01b 537
destinyXfate 2:0e2ef1edf01b 538 ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 539 const Bytef *dictionary,
destinyXfate 2:0e2ef1edf01b 540 uInt dictLength));
destinyXfate 2:0e2ef1edf01b 541 /*
destinyXfate 2:0e2ef1edf01b 542 Initializes the compression dictionary from the given byte sequence
destinyXfate 2:0e2ef1edf01b 543 without producing any compressed output. This function must be called
destinyXfate 2:0e2ef1edf01b 544 immediately after deflateInit, deflateInit2 or deflateReset, before any
destinyXfate 2:0e2ef1edf01b 545 call of deflate. The compressor and decompressor must use exactly the same
destinyXfate 2:0e2ef1edf01b 546 dictionary (see inflateSetDictionary).
destinyXfate 2:0e2ef1edf01b 547
destinyXfate 2:0e2ef1edf01b 548 The dictionary should consist of strings (byte sequences) that are likely
destinyXfate 2:0e2ef1edf01b 549 to be encountered later in the data to be compressed, with the most commonly
destinyXfate 2:0e2ef1edf01b 550 used strings preferably put towards the end of the dictionary. Using a
destinyXfate 2:0e2ef1edf01b 551 dictionary is most useful when the data to be compressed is short and can be
destinyXfate 2:0e2ef1edf01b 552 predicted with good accuracy; the data can then be compressed better than
destinyXfate 2:0e2ef1edf01b 553 with the default empty dictionary.
destinyXfate 2:0e2ef1edf01b 554
destinyXfate 2:0e2ef1edf01b 555 Depending on the size of the compression data structures selected by
destinyXfate 2:0e2ef1edf01b 556 deflateInit or deflateInit2, a part of the dictionary may in effect be
destinyXfate 2:0e2ef1edf01b 557 discarded, for example if the dictionary is larger than the window size in
destinyXfate 2:0e2ef1edf01b 558 deflate or deflate2. Thus the strings most likely to be useful should be
destinyXfate 2:0e2ef1edf01b 559 put at the end of the dictionary, not at the front. In addition, the
destinyXfate 2:0e2ef1edf01b 560 current implementation of deflate will use at most the window size minus
destinyXfate 2:0e2ef1edf01b 561 262 bytes of the provided dictionary.
destinyXfate 2:0e2ef1edf01b 562
destinyXfate 2:0e2ef1edf01b 563 Upon return of this function, strm->adler is set to the adler32 value
destinyXfate 2:0e2ef1edf01b 564 of the dictionary; the decompressor may later use this value to determine
destinyXfate 2:0e2ef1edf01b 565 which dictionary has been used by the compressor. (The adler32 value
destinyXfate 2:0e2ef1edf01b 566 applies to the whole dictionary even if only a subset of the dictionary is
destinyXfate 2:0e2ef1edf01b 567 actually used by the compressor.) If a raw deflate was requested, then the
destinyXfate 2:0e2ef1edf01b 568 adler32 value is not computed and strm->adler is not set.
destinyXfate 2:0e2ef1edf01b 569
destinyXfate 2:0e2ef1edf01b 570 deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
destinyXfate 2:0e2ef1edf01b 571 parameter is invalid (such as NULL dictionary) or the stream state is
destinyXfate 2:0e2ef1edf01b 572 inconsistent (for example if deflate has already been called for this stream
destinyXfate 2:0e2ef1edf01b 573 or if the compression method is bsort). deflateSetDictionary does not
destinyXfate 2:0e2ef1edf01b 574 perform any compression: this will be done by deflate().
destinyXfate 2:0e2ef1edf01b 575 */
destinyXfate 2:0e2ef1edf01b 576
destinyXfate 2:0e2ef1edf01b 577 ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
destinyXfate 2:0e2ef1edf01b 578 z_streamp source));
destinyXfate 2:0e2ef1edf01b 579 /*
destinyXfate 2:0e2ef1edf01b 580 Sets the destination stream as a complete copy of the source stream.
destinyXfate 2:0e2ef1edf01b 581
destinyXfate 2:0e2ef1edf01b 582 This function can be useful when several compression strategies will be
destinyXfate 2:0e2ef1edf01b 583 tried, for example when there are several ways of pre-processing the input
destinyXfate 2:0e2ef1edf01b 584 data with a filter. The streams that will be discarded should then be freed
destinyXfate 2:0e2ef1edf01b 585 by calling deflateEnd. Note that deflateCopy duplicates the internal
destinyXfate 2:0e2ef1edf01b 586 compression state which can be quite large, so this strategy is slow and
destinyXfate 2:0e2ef1edf01b 587 can consume lots of memory.
destinyXfate 2:0e2ef1edf01b 588
destinyXfate 2:0e2ef1edf01b 589 deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
destinyXfate 2:0e2ef1edf01b 590 enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
destinyXfate 2:0e2ef1edf01b 591 (such as zalloc being NULL). msg is left unchanged in both source and
destinyXfate 2:0e2ef1edf01b 592 destination.
destinyXfate 2:0e2ef1edf01b 593 */
destinyXfate 2:0e2ef1edf01b 594
destinyXfate 2:0e2ef1edf01b 595 ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 596 /*
destinyXfate 2:0e2ef1edf01b 597 This function is equivalent to deflateEnd followed by deflateInit,
destinyXfate 2:0e2ef1edf01b 598 but does not free and reallocate all the internal compression state.
destinyXfate 2:0e2ef1edf01b 599 The stream will keep the same compression level and any other attributes
destinyXfate 2:0e2ef1edf01b 600 that may have been set by deflateInit2.
destinyXfate 2:0e2ef1edf01b 601
destinyXfate 2:0e2ef1edf01b 602 deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 603 stream state was inconsistent (such as zalloc or state being NULL).
destinyXfate 2:0e2ef1edf01b 604 */
destinyXfate 2:0e2ef1edf01b 605
destinyXfate 2:0e2ef1edf01b 606 ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 607 int level,
destinyXfate 2:0e2ef1edf01b 608 int strategy));
destinyXfate 2:0e2ef1edf01b 609 /*
destinyXfate 2:0e2ef1edf01b 610 Dynamically update the compression level and compression strategy. The
destinyXfate 2:0e2ef1edf01b 611 interpretation of level and strategy is as in deflateInit2. This can be
destinyXfate 2:0e2ef1edf01b 612 used to switch between compression and straight copy of the input data, or
destinyXfate 2:0e2ef1edf01b 613 to switch to a different kind of input data requiring a different
destinyXfate 2:0e2ef1edf01b 614 strategy. If the compression level is changed, the input available so far
destinyXfate 2:0e2ef1edf01b 615 is compressed with the old level (and may be flushed); the new level will
destinyXfate 2:0e2ef1edf01b 616 take effect only at the next call of deflate().
destinyXfate 2:0e2ef1edf01b 617
destinyXfate 2:0e2ef1edf01b 618 Before the call of deflateParams, the stream state must be set as for
destinyXfate 2:0e2ef1edf01b 619 a call of deflate(), since the currently available input may have to
destinyXfate 2:0e2ef1edf01b 620 be compressed and flushed. In particular, strm->avail_out must be non-zero.
destinyXfate 2:0e2ef1edf01b 621
destinyXfate 2:0e2ef1edf01b 622 deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 623 stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
destinyXfate 2:0e2ef1edf01b 624 if strm->avail_out was zero.
destinyXfate 2:0e2ef1edf01b 625 */
destinyXfate 2:0e2ef1edf01b 626
destinyXfate 2:0e2ef1edf01b 627 ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 628 int good_length,
destinyXfate 2:0e2ef1edf01b 629 int max_lazy,
destinyXfate 2:0e2ef1edf01b 630 int nice_length,
destinyXfate 2:0e2ef1edf01b 631 int max_chain));
destinyXfate 2:0e2ef1edf01b 632 /*
destinyXfate 2:0e2ef1edf01b 633 Fine tune deflate's internal compression parameters. This should only be
destinyXfate 2:0e2ef1edf01b 634 used by someone who understands the algorithm used by zlib's deflate for
destinyXfate 2:0e2ef1edf01b 635 searching for the best matching string, and even then only by the most
destinyXfate 2:0e2ef1edf01b 636 fanatic optimizer trying to squeeze out the last compressed bit for their
destinyXfate 2:0e2ef1edf01b 637 specific input data. Read the deflate.c source code for the meaning of the
destinyXfate 2:0e2ef1edf01b 638 max_lazy, good_length, nice_length, and max_chain parameters.
destinyXfate 2:0e2ef1edf01b 639
destinyXfate 2:0e2ef1edf01b 640 deflateTune() can be called after deflateInit() or deflateInit2(), and
destinyXfate 2:0e2ef1edf01b 641 returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
destinyXfate 2:0e2ef1edf01b 642 */
destinyXfate 2:0e2ef1edf01b 643
destinyXfate 2:0e2ef1edf01b 644 ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 645 uLong sourceLen));
destinyXfate 2:0e2ef1edf01b 646 /*
destinyXfate 2:0e2ef1edf01b 647 deflateBound() returns an upper bound on the compressed size after
destinyXfate 2:0e2ef1edf01b 648 deflation of sourceLen bytes. It must be called after deflateInit()
destinyXfate 2:0e2ef1edf01b 649 or deflateInit2(). This would be used to allocate an output buffer
destinyXfate 2:0e2ef1edf01b 650 for deflation in a single pass, and so would be called before deflate().
destinyXfate 2:0e2ef1edf01b 651 */
destinyXfate 2:0e2ef1edf01b 652
destinyXfate 2:0e2ef1edf01b 653 ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 654 int bits,
destinyXfate 2:0e2ef1edf01b 655 int value));
destinyXfate 2:0e2ef1edf01b 656 /*
destinyXfate 2:0e2ef1edf01b 657 deflatePrime() inserts bits in the deflate output stream. The intent
destinyXfate 2:0e2ef1edf01b 658 is that this function is used to start off the deflate output with the
destinyXfate 2:0e2ef1edf01b 659 bits leftover from a previous deflate stream when appending to it. As such,
destinyXfate 2:0e2ef1edf01b 660 this function can only be used for raw deflate, and must be used before the
destinyXfate 2:0e2ef1edf01b 661 first deflate() call after a deflateInit2() or deflateReset(). bits must be
destinyXfate 2:0e2ef1edf01b 662 less than or equal to 16, and that many of the least significant bits of
destinyXfate 2:0e2ef1edf01b 663 value will be inserted in the output.
destinyXfate 2:0e2ef1edf01b 664
destinyXfate 2:0e2ef1edf01b 665 deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 666 stream state was inconsistent.
destinyXfate 2:0e2ef1edf01b 667 */
destinyXfate 2:0e2ef1edf01b 668
destinyXfate 2:0e2ef1edf01b 669 ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 670 gz_headerp head));
destinyXfate 2:0e2ef1edf01b 671 /*
destinyXfate 2:0e2ef1edf01b 672 deflateSetHeader() provides gzip header information for when a gzip
destinyXfate 2:0e2ef1edf01b 673 stream is requested by deflateInit2(). deflateSetHeader() may be called
destinyXfate 2:0e2ef1edf01b 674 after deflateInit2() or deflateReset() and before the first call of
destinyXfate 2:0e2ef1edf01b 675 deflate(). The text, time, os, extra field, name, and comment information
destinyXfate 2:0e2ef1edf01b 676 in the provided gz_header structure are written to the gzip header (xflag is
destinyXfate 2:0e2ef1edf01b 677 ignored -- the extra flags are set according to the compression level). The
destinyXfate 2:0e2ef1edf01b 678 caller must assure that, if not Z_NULL, name and comment are terminated with
destinyXfate 2:0e2ef1edf01b 679 a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
destinyXfate 2:0e2ef1edf01b 680 available there. If hcrc is true, a gzip header crc is included. Note that
destinyXfate 2:0e2ef1edf01b 681 the current versions of the command-line version of gzip (up through version
destinyXfate 2:0e2ef1edf01b 682 1.3.x) do not support header crc's, and will report that it is a "multi-part
destinyXfate 2:0e2ef1edf01b 683 gzip file" and give up.
destinyXfate 2:0e2ef1edf01b 684
destinyXfate 2:0e2ef1edf01b 685 If deflateSetHeader is not used, the default gzip header has text false,
destinyXfate 2:0e2ef1edf01b 686 the time set to zero, and os set to 255, with no extra, name, or comment
destinyXfate 2:0e2ef1edf01b 687 fields. The gzip header is returned to the default state by deflateReset().
destinyXfate 2:0e2ef1edf01b 688
destinyXfate 2:0e2ef1edf01b 689 deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 690 stream state was inconsistent.
destinyXfate 2:0e2ef1edf01b 691 */
destinyXfate 2:0e2ef1edf01b 692
destinyXfate 2:0e2ef1edf01b 693 /*
destinyXfate 2:0e2ef1edf01b 694 ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 695 int windowBits));
destinyXfate 2:0e2ef1edf01b 696
destinyXfate 2:0e2ef1edf01b 697 This is another version of inflateInit with an extra parameter. The
destinyXfate 2:0e2ef1edf01b 698 fields next_in, avail_in, zalloc, zfree and opaque must be initialized
destinyXfate 2:0e2ef1edf01b 699 before by the caller.
destinyXfate 2:0e2ef1edf01b 700
destinyXfate 2:0e2ef1edf01b 701 The windowBits parameter is the base two logarithm of the maximum window
destinyXfate 2:0e2ef1edf01b 702 size (the size of the history buffer). It should be in the range 8..15 for
destinyXfate 2:0e2ef1edf01b 703 this version of the library. The default value is 15 if inflateInit is used
destinyXfate 2:0e2ef1edf01b 704 instead. windowBits must be greater than or equal to the windowBits value
destinyXfate 2:0e2ef1edf01b 705 provided to deflateInit2() while compressing, or it must be equal to 15 if
destinyXfate 2:0e2ef1edf01b 706 deflateInit2() was not used. If a compressed stream with a larger window
destinyXfate 2:0e2ef1edf01b 707 size is given as input, inflate() will return with the error code
destinyXfate 2:0e2ef1edf01b 708 Z_DATA_ERROR instead of trying to allocate a larger window.
destinyXfate 2:0e2ef1edf01b 709
destinyXfate 2:0e2ef1edf01b 710 windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
destinyXfate 2:0e2ef1edf01b 711 determines the window size. inflate() will then process raw deflate data,
destinyXfate 2:0e2ef1edf01b 712 not looking for a zlib or gzip header, not generating a check value, and not
destinyXfate 2:0e2ef1edf01b 713 looking for any check values for comparison at the end of the stream. This
destinyXfate 2:0e2ef1edf01b 714 is for use with other formats that use the deflate compressed data format
destinyXfate 2:0e2ef1edf01b 715 such as zip. Those formats provide their own check values. If a custom
destinyXfate 2:0e2ef1edf01b 716 format is developed using the raw deflate format for compressed data, it is
destinyXfate 2:0e2ef1edf01b 717 recommended that a check value such as an adler32 or a crc32 be applied to
destinyXfate 2:0e2ef1edf01b 718 the uncompressed data as is done in the zlib, gzip, and zip formats. For
destinyXfate 2:0e2ef1edf01b 719 most applications, the zlib format should be used as is. Note that comments
destinyXfate 2:0e2ef1edf01b 720 above on the use in deflateInit2() applies to the magnitude of windowBits.
destinyXfate 2:0e2ef1edf01b 721
destinyXfate 2:0e2ef1edf01b 722 windowBits can also be greater than 15 for optional gzip decoding. Add
destinyXfate 2:0e2ef1edf01b 723 32 to windowBits to enable zlib and gzip decoding with automatic header
destinyXfate 2:0e2ef1edf01b 724 detection, or add 16 to decode only the gzip format (the zlib format will
destinyXfate 2:0e2ef1edf01b 725 return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is
destinyXfate 2:0e2ef1edf01b 726 a crc32 instead of an adler32.
destinyXfate 2:0e2ef1edf01b 727
destinyXfate 2:0e2ef1edf01b 728 inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
destinyXfate 2:0e2ef1edf01b 729 memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
destinyXfate 2:0e2ef1edf01b 730 is set to null if there is no error message. inflateInit2 does not perform
destinyXfate 2:0e2ef1edf01b 731 any decompression apart from reading the zlib header if present: this will
destinyXfate 2:0e2ef1edf01b 732 be done by inflate(). (So next_in and avail_in may be modified, but next_out
destinyXfate 2:0e2ef1edf01b 733 and avail_out are unchanged.)
destinyXfate 2:0e2ef1edf01b 734 */
destinyXfate 2:0e2ef1edf01b 735
destinyXfate 2:0e2ef1edf01b 736 ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 737 const Bytef *dictionary,
destinyXfate 2:0e2ef1edf01b 738 uInt dictLength));
destinyXfate 2:0e2ef1edf01b 739 /*
destinyXfate 2:0e2ef1edf01b 740 Initializes the decompression dictionary from the given uncompressed byte
destinyXfate 2:0e2ef1edf01b 741 sequence. This function must be called immediately after a call of inflate,
destinyXfate 2:0e2ef1edf01b 742 if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
destinyXfate 2:0e2ef1edf01b 743 can be determined from the adler32 value returned by that call of inflate.
destinyXfate 2:0e2ef1edf01b 744 The compressor and decompressor must use exactly the same dictionary (see
destinyXfate 2:0e2ef1edf01b 745 deflateSetDictionary). For raw inflate, this function can be called
destinyXfate 2:0e2ef1edf01b 746 immediately after inflateInit2() or inflateReset() and before any call of
destinyXfate 2:0e2ef1edf01b 747 inflate() to set the dictionary. The application must insure that the
destinyXfate 2:0e2ef1edf01b 748 dictionary that was used for compression is provided.
destinyXfate 2:0e2ef1edf01b 749
destinyXfate 2:0e2ef1edf01b 750 inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
destinyXfate 2:0e2ef1edf01b 751 parameter is invalid (such as NULL dictionary) or the stream state is
destinyXfate 2:0e2ef1edf01b 752 inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
destinyXfate 2:0e2ef1edf01b 753 expected one (incorrect adler32 value). inflateSetDictionary does not
destinyXfate 2:0e2ef1edf01b 754 perform any decompression: this will be done by subsequent calls of
destinyXfate 2:0e2ef1edf01b 755 inflate().
destinyXfate 2:0e2ef1edf01b 756 */
destinyXfate 2:0e2ef1edf01b 757
destinyXfate 2:0e2ef1edf01b 758 ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 759 /*
destinyXfate 2:0e2ef1edf01b 760 Skips invalid compressed data until a full flush point (see above the
destinyXfate 2:0e2ef1edf01b 761 description of deflate with Z_FULL_FLUSH) can be found, or until all
destinyXfate 2:0e2ef1edf01b 762 available input is skipped. No output is provided.
destinyXfate 2:0e2ef1edf01b 763
destinyXfate 2:0e2ef1edf01b 764 inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
destinyXfate 2:0e2ef1edf01b 765 if no more input was provided, Z_DATA_ERROR if no flush point has been found,
destinyXfate 2:0e2ef1edf01b 766 or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
destinyXfate 2:0e2ef1edf01b 767 case, the application may save the current current value of total_in which
destinyXfate 2:0e2ef1edf01b 768 indicates where valid compressed data was found. In the error case, the
destinyXfate 2:0e2ef1edf01b 769 application may repeatedly call inflateSync, providing more input each time,
destinyXfate 2:0e2ef1edf01b 770 until success or end of the input data.
destinyXfate 2:0e2ef1edf01b 771 */
destinyXfate 2:0e2ef1edf01b 772
destinyXfate 2:0e2ef1edf01b 773 ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
destinyXfate 2:0e2ef1edf01b 774 z_streamp source));
destinyXfate 2:0e2ef1edf01b 775 /*
destinyXfate 2:0e2ef1edf01b 776 Sets the destination stream as a complete copy of the source stream.
destinyXfate 2:0e2ef1edf01b 777
destinyXfate 2:0e2ef1edf01b 778 This function can be useful when randomly accessing a large stream. The
destinyXfate 2:0e2ef1edf01b 779 first pass through the stream can periodically record the inflate state,
destinyXfate 2:0e2ef1edf01b 780 allowing restarting inflate at those points when randomly accessing the
destinyXfate 2:0e2ef1edf01b 781 stream.
destinyXfate 2:0e2ef1edf01b 782
destinyXfate 2:0e2ef1edf01b 783 inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
destinyXfate 2:0e2ef1edf01b 784 enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
destinyXfate 2:0e2ef1edf01b 785 (such as zalloc being NULL). msg is left unchanged in both source and
destinyXfate 2:0e2ef1edf01b 786 destination.
destinyXfate 2:0e2ef1edf01b 787 */
destinyXfate 2:0e2ef1edf01b 788
destinyXfate 2:0e2ef1edf01b 789 ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 790 /*
destinyXfate 2:0e2ef1edf01b 791 This function is equivalent to inflateEnd followed by inflateInit,
destinyXfate 2:0e2ef1edf01b 792 but does not free and reallocate all the internal decompression state.
destinyXfate 2:0e2ef1edf01b 793 The stream will keep attributes that may have been set by inflateInit2.
destinyXfate 2:0e2ef1edf01b 794
destinyXfate 2:0e2ef1edf01b 795 inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 796 stream state was inconsistent (such as zalloc or state being NULL).
destinyXfate 2:0e2ef1edf01b 797 */
destinyXfate 2:0e2ef1edf01b 798
destinyXfate 2:0e2ef1edf01b 799 ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 800 int bits,
destinyXfate 2:0e2ef1edf01b 801 int value));
destinyXfate 2:0e2ef1edf01b 802 /*
destinyXfate 2:0e2ef1edf01b 803 This function inserts bits in the inflate input stream. The intent is
destinyXfate 2:0e2ef1edf01b 804 that this function is used to start inflating at a bit position in the
destinyXfate 2:0e2ef1edf01b 805 middle of a byte. The provided bits will be used before any bytes are used
destinyXfate 2:0e2ef1edf01b 806 from next_in. This function should only be used with raw inflate, and
destinyXfate 2:0e2ef1edf01b 807 should be used before the first inflate() call after inflateInit2() or
destinyXfate 2:0e2ef1edf01b 808 inflateReset(). bits must be less than or equal to 16, and that many of the
destinyXfate 2:0e2ef1edf01b 809 least significant bits of value will be inserted in the input.
destinyXfate 2:0e2ef1edf01b 810
destinyXfate 2:0e2ef1edf01b 811 inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 812 stream state was inconsistent.
destinyXfate 2:0e2ef1edf01b 813 */
destinyXfate 2:0e2ef1edf01b 814
destinyXfate 2:0e2ef1edf01b 815 ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 816 gz_headerp head));
destinyXfate 2:0e2ef1edf01b 817 /*
destinyXfate 2:0e2ef1edf01b 818 inflateGetHeader() requests that gzip header information be stored in the
destinyXfate 2:0e2ef1edf01b 819 provided gz_header structure. inflateGetHeader() may be called after
destinyXfate 2:0e2ef1edf01b 820 inflateInit2() or inflateReset(), and before the first call of inflate().
destinyXfate 2:0e2ef1edf01b 821 As inflate() processes the gzip stream, head->done is zero until the header
destinyXfate 2:0e2ef1edf01b 822 is completed, at which time head->done is set to one. If a zlib stream is
destinyXfate 2:0e2ef1edf01b 823 being decoded, then head->done is set to -1 to indicate that there will be
destinyXfate 2:0e2ef1edf01b 824 no gzip header information forthcoming. Note that Z_BLOCK can be used to
destinyXfate 2:0e2ef1edf01b 825 force inflate() to return immediately after header processing is complete
destinyXfate 2:0e2ef1edf01b 826 and before any actual data is decompressed.
destinyXfate 2:0e2ef1edf01b 827
destinyXfate 2:0e2ef1edf01b 828 The text, time, xflags, and os fields are filled in with the gzip header
destinyXfate 2:0e2ef1edf01b 829 contents. hcrc is set to true if there is a header CRC. (The header CRC
destinyXfate 2:0e2ef1edf01b 830 was valid if done is set to one.) If extra is not Z_NULL, then extra_max
destinyXfate 2:0e2ef1edf01b 831 contains the maximum number of bytes to write to extra. Once done is true,
destinyXfate 2:0e2ef1edf01b 832 extra_len contains the actual extra field length, and extra contains the
destinyXfate 2:0e2ef1edf01b 833 extra field, or that field truncated if extra_max is less than extra_len.
destinyXfate 2:0e2ef1edf01b 834 If name is not Z_NULL, then up to name_max characters are written there,
destinyXfate 2:0e2ef1edf01b 835 terminated with a zero unless the length is greater than name_max. If
destinyXfate 2:0e2ef1edf01b 836 comment is not Z_NULL, then up to comm_max characters are written there,
destinyXfate 2:0e2ef1edf01b 837 terminated with a zero unless the length is greater than comm_max. When
destinyXfate 2:0e2ef1edf01b 838 any of extra, name, or comment are not Z_NULL and the respective field is
destinyXfate 2:0e2ef1edf01b 839 not present in the header, then that field is set to Z_NULL to signal its
destinyXfate 2:0e2ef1edf01b 840 absence. This allows the use of deflateSetHeader() with the returned
destinyXfate 2:0e2ef1edf01b 841 structure to duplicate the header. However if those fields are set to
destinyXfate 2:0e2ef1edf01b 842 allocated memory, then the application will need to save those pointers
destinyXfate 2:0e2ef1edf01b 843 elsewhere so that they can be eventually freed.
destinyXfate 2:0e2ef1edf01b 844
destinyXfate 2:0e2ef1edf01b 845 If inflateGetHeader is not used, then the header information is simply
destinyXfate 2:0e2ef1edf01b 846 discarded. The header is always checked for validity, including the header
destinyXfate 2:0e2ef1edf01b 847 CRC if present. inflateReset() will reset the process to discard the header
destinyXfate 2:0e2ef1edf01b 848 information. The application would need to call inflateGetHeader() again to
destinyXfate 2:0e2ef1edf01b 849 retrieve the header from the next gzip stream.
destinyXfate 2:0e2ef1edf01b 850
destinyXfate 2:0e2ef1edf01b 851 inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
destinyXfate 2:0e2ef1edf01b 852 stream state was inconsistent.
destinyXfate 2:0e2ef1edf01b 853 */
destinyXfate 2:0e2ef1edf01b 854
destinyXfate 2:0e2ef1edf01b 855 /*
destinyXfate 2:0e2ef1edf01b 856 ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
destinyXfate 2:0e2ef1edf01b 857 unsigned char FAR *window));
destinyXfate 2:0e2ef1edf01b 858
destinyXfate 2:0e2ef1edf01b 859 Initialize the internal stream state for decompression using inflateBack()
destinyXfate 2:0e2ef1edf01b 860 calls. The fields zalloc, zfree and opaque in strm must be initialized
destinyXfate 2:0e2ef1edf01b 861 before the call. If zalloc and zfree are Z_NULL, then the default library-
destinyXfate 2:0e2ef1edf01b 862 derived memory allocation routines are used. windowBits is the base two
destinyXfate 2:0e2ef1edf01b 863 logarithm of the window size, in the range 8..15. window is a caller
destinyXfate 2:0e2ef1edf01b 864 supplied buffer of that size. Except for special applications where it is
destinyXfate 2:0e2ef1edf01b 865 assured that deflate was used with small window sizes, windowBits must be 15
destinyXfate 2:0e2ef1edf01b 866 and a 32K byte window must be supplied to be able to decompress general
destinyXfate 2:0e2ef1edf01b 867 deflate streams.
destinyXfate 2:0e2ef1edf01b 868
destinyXfate 2:0e2ef1edf01b 869 See inflateBack() for the usage of these routines.
destinyXfate 2:0e2ef1edf01b 870
destinyXfate 2:0e2ef1edf01b 871 inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
destinyXfate 2:0e2ef1edf01b 872 the paramaters are invalid, Z_MEM_ERROR if the internal state could not
destinyXfate 2:0e2ef1edf01b 873 be allocated, or Z_VERSION_ERROR if the version of the library does not
destinyXfate 2:0e2ef1edf01b 874 match the version of the header file.
destinyXfate 2:0e2ef1edf01b 875 */
destinyXfate 2:0e2ef1edf01b 876
destinyXfate 2:0e2ef1edf01b 877 typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
destinyXfate 2:0e2ef1edf01b 878 typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
destinyXfate 2:0e2ef1edf01b 879
destinyXfate 2:0e2ef1edf01b 880 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 881 in_func in, void FAR *in_desc,
destinyXfate 2:0e2ef1edf01b 882 out_func out, void FAR *out_desc));
destinyXfate 2:0e2ef1edf01b 883 /*
destinyXfate 2:0e2ef1edf01b 884 inflateBack() does a raw inflate with a single call using a call-back
destinyXfate 2:0e2ef1edf01b 885 interface for input and output. This is more efficient than inflate() for
destinyXfate 2:0e2ef1edf01b 886 file i/o applications in that it avoids copying between the output and the
destinyXfate 2:0e2ef1edf01b 887 sliding window by simply making the window itself the output buffer. This
destinyXfate 2:0e2ef1edf01b 888 function trusts the application to not change the output buffer passed by
destinyXfate 2:0e2ef1edf01b 889 the output function, at least until inflateBack() returns.
destinyXfate 2:0e2ef1edf01b 890
destinyXfate 2:0e2ef1edf01b 891 inflateBackInit() must be called first to allocate the internal state
destinyXfate 2:0e2ef1edf01b 892 and to initialize the state with the user-provided window buffer.
destinyXfate 2:0e2ef1edf01b 893 inflateBack() may then be used multiple times to inflate a complete, raw
destinyXfate 2:0e2ef1edf01b 894 deflate stream with each call. inflateBackEnd() is then called to free
destinyXfate 2:0e2ef1edf01b 895 the allocated state.
destinyXfate 2:0e2ef1edf01b 896
destinyXfate 2:0e2ef1edf01b 897 A raw deflate stream is one with no zlib or gzip header or trailer.
destinyXfate 2:0e2ef1edf01b 898 This routine would normally be used in a utility that reads zip or gzip
destinyXfate 2:0e2ef1edf01b 899 files and writes out uncompressed files. The utility would decode the
destinyXfate 2:0e2ef1edf01b 900 header and process the trailer on its own, hence this routine expects
destinyXfate 2:0e2ef1edf01b 901 only the raw deflate stream to decompress. This is different from the
destinyXfate 2:0e2ef1edf01b 902 normal behavior of inflate(), which expects either a zlib or gzip header and
destinyXfate 2:0e2ef1edf01b 903 trailer around the deflate stream.
destinyXfate 2:0e2ef1edf01b 904
destinyXfate 2:0e2ef1edf01b 905 inflateBack() uses two subroutines supplied by the caller that are then
destinyXfate 2:0e2ef1edf01b 906 called by inflateBack() for input and output. inflateBack() calls those
destinyXfate 2:0e2ef1edf01b 907 routines until it reads a complete deflate stream and writes out all of the
destinyXfate 2:0e2ef1edf01b 908 uncompressed data, or until it encounters an error. The function's
destinyXfate 2:0e2ef1edf01b 909 parameters and return types are defined above in the in_func and out_func
destinyXfate 2:0e2ef1edf01b 910 typedefs. inflateBack() will call in(in_desc, &buf) which should return the
destinyXfate 2:0e2ef1edf01b 911 number of bytes of provided input, and a pointer to that input in buf. If
destinyXfate 2:0e2ef1edf01b 912 there is no input available, in() must return zero--buf is ignored in that
destinyXfate 2:0e2ef1edf01b 913 case--and inflateBack() will return a buffer error. inflateBack() will call
destinyXfate 2:0e2ef1edf01b 914 out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
destinyXfate 2:0e2ef1edf01b 915 should return zero on success, or non-zero on failure. If out() returns
destinyXfate 2:0e2ef1edf01b 916 non-zero, inflateBack() will return with an error. Neither in() nor out()
destinyXfate 2:0e2ef1edf01b 917 are permitted to change the contents of the window provided to
destinyXfate 2:0e2ef1edf01b 918 inflateBackInit(), which is also the buffer that out() uses to write from.
destinyXfate 2:0e2ef1edf01b 919 The length written by out() will be at most the window size. Any non-zero
destinyXfate 2:0e2ef1edf01b 920 amount of input may be provided by in().
destinyXfate 2:0e2ef1edf01b 921
destinyXfate 2:0e2ef1edf01b 922 For convenience, inflateBack() can be provided input on the first call by
destinyXfate 2:0e2ef1edf01b 923 setting strm->next_in and strm->avail_in. If that input is exhausted, then
destinyXfate 2:0e2ef1edf01b 924 in() will be called. Therefore strm->next_in must be initialized before
destinyXfate 2:0e2ef1edf01b 925 calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
destinyXfate 2:0e2ef1edf01b 926 immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
destinyXfate 2:0e2ef1edf01b 927 must also be initialized, and then if strm->avail_in is not zero, input will
destinyXfate 2:0e2ef1edf01b 928 initially be taken from strm->next_in[0 .. strm->avail_in - 1].
destinyXfate 2:0e2ef1edf01b 929
destinyXfate 2:0e2ef1edf01b 930 The in_desc and out_desc parameters of inflateBack() is passed as the
destinyXfate 2:0e2ef1edf01b 931 first parameter of in() and out() respectively when they are called. These
destinyXfate 2:0e2ef1edf01b 932 descriptors can be optionally used to pass any information that the caller-
destinyXfate 2:0e2ef1edf01b 933 supplied in() and out() functions need to do their job.
destinyXfate 2:0e2ef1edf01b 934
destinyXfate 2:0e2ef1edf01b 935 On return, inflateBack() will set strm->next_in and strm->avail_in to
destinyXfate 2:0e2ef1edf01b 936 pass back any unused input that was provided by the last in() call. The
destinyXfate 2:0e2ef1edf01b 937 return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
destinyXfate 2:0e2ef1edf01b 938 if in() or out() returned an error, Z_DATA_ERROR if there was a format
destinyXfate 2:0e2ef1edf01b 939 error in the deflate stream (in which case strm->msg is set to indicate the
destinyXfate 2:0e2ef1edf01b 940 nature of the error), or Z_STREAM_ERROR if the stream was not properly
destinyXfate 2:0e2ef1edf01b 941 initialized. In the case of Z_BUF_ERROR, an input or output error can be
destinyXfate 2:0e2ef1edf01b 942 distinguished using strm->next_in which will be Z_NULL only if in() returned
destinyXfate 2:0e2ef1edf01b 943 an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
destinyXfate 2:0e2ef1edf01b 944 out() returning non-zero. (in() will always be called before out(), so
destinyXfate 2:0e2ef1edf01b 945 strm->next_in is assured to be defined if out() returns non-zero.) Note
destinyXfate 2:0e2ef1edf01b 946 that inflateBack() cannot return Z_OK.
destinyXfate 2:0e2ef1edf01b 947 */
destinyXfate 2:0e2ef1edf01b 948
destinyXfate 2:0e2ef1edf01b 949 ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
destinyXfate 2:0e2ef1edf01b 950 /*
destinyXfate 2:0e2ef1edf01b 951 All memory allocated by inflateBackInit() is freed.
destinyXfate 2:0e2ef1edf01b 952
destinyXfate 2:0e2ef1edf01b 953 inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
destinyXfate 2:0e2ef1edf01b 954 state was inconsistent.
destinyXfate 2:0e2ef1edf01b 955 */
destinyXfate 2:0e2ef1edf01b 956
destinyXfate 2:0e2ef1edf01b 957 ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
destinyXfate 2:0e2ef1edf01b 958 /* Return flags indicating compile-time options.
destinyXfate 2:0e2ef1edf01b 959
destinyXfate 2:0e2ef1edf01b 960 Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
destinyXfate 2:0e2ef1edf01b 961 1.0: size of uInt
destinyXfate 2:0e2ef1edf01b 962 3.2: size of uLong
destinyXfate 2:0e2ef1edf01b 963 5.4: size of voidpf (pointer)
destinyXfate 2:0e2ef1edf01b 964 7.6: size of z_off_t
destinyXfate 2:0e2ef1edf01b 965
destinyXfate 2:0e2ef1edf01b 966 Compiler, assembler, and debug options:
destinyXfate 2:0e2ef1edf01b 967 8: DEBUG
destinyXfate 2:0e2ef1edf01b 968 9: ASMV or ASMINF -- use ASM code
destinyXfate 2:0e2ef1edf01b 969 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
destinyXfate 2:0e2ef1edf01b 970 11: 0 (reserved)
destinyXfate 2:0e2ef1edf01b 971
destinyXfate 2:0e2ef1edf01b 972 One-time table building (smaller code, but not thread-safe if true):
destinyXfate 2:0e2ef1edf01b 973 12: BUILDFIXED -- build static block decoding tables when needed
destinyXfate 2:0e2ef1edf01b 974 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
destinyXfate 2:0e2ef1edf01b 975 14,15: 0 (reserved)
destinyXfate 2:0e2ef1edf01b 976
destinyXfate 2:0e2ef1edf01b 977 Library content (indicates missing functionality):
destinyXfate 2:0e2ef1edf01b 978 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
destinyXfate 2:0e2ef1edf01b 979 deflate code when not needed)
destinyXfate 2:0e2ef1edf01b 980 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
destinyXfate 2:0e2ef1edf01b 981 and decode gzip streams (to avoid linking crc code)
destinyXfate 2:0e2ef1edf01b 982 18-19: 0 (reserved)
destinyXfate 2:0e2ef1edf01b 983
destinyXfate 2:0e2ef1edf01b 984 Operation variations (changes in library functionality):
destinyXfate 2:0e2ef1edf01b 985 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
destinyXfate 2:0e2ef1edf01b 986 21: FASTEST -- deflate algorithm with only one, lowest compression level
destinyXfate 2:0e2ef1edf01b 987 22,23: 0 (reserved)
destinyXfate 2:0e2ef1edf01b 988
destinyXfate 2:0e2ef1edf01b 989 The sprintf variant used by gzprintf (zero is best):
destinyXfate 2:0e2ef1edf01b 990 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
destinyXfate 2:0e2ef1edf01b 991 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
destinyXfate 2:0e2ef1edf01b 992 26: 0 = returns value, 1 = void -- 1 means inferred string length returned
destinyXfate 2:0e2ef1edf01b 993
destinyXfate 2:0e2ef1edf01b 994 Remainder:
destinyXfate 2:0e2ef1edf01b 995 27-31: 0 (reserved)
destinyXfate 2:0e2ef1edf01b 996 */
destinyXfate 2:0e2ef1edf01b 997
destinyXfate 2:0e2ef1edf01b 998
destinyXfate 2:0e2ef1edf01b 999 /* utility functions */
destinyXfate 2:0e2ef1edf01b 1000
destinyXfate 2:0e2ef1edf01b 1001 /*
destinyXfate 2:0e2ef1edf01b 1002 The following utility functions are implemented on top of the
destinyXfate 2:0e2ef1edf01b 1003 basic stream-oriented functions. To simplify the interface, some
destinyXfate 2:0e2ef1edf01b 1004 default options are assumed (compression level and memory usage,
destinyXfate 2:0e2ef1edf01b 1005 standard memory allocation functions). The source code of these
destinyXfate 2:0e2ef1edf01b 1006 utility functions can easily be modified if you need special options.
destinyXfate 2:0e2ef1edf01b 1007 */
destinyXfate 2:0e2ef1edf01b 1008
destinyXfate 2:0e2ef1edf01b 1009 ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
destinyXfate 2:0e2ef1edf01b 1010 const Bytef *source, uLong sourceLen));
destinyXfate 2:0e2ef1edf01b 1011 /*
destinyXfate 2:0e2ef1edf01b 1012 Compresses the source buffer into the destination buffer. sourceLen is
destinyXfate 2:0e2ef1edf01b 1013 the byte length of the source buffer. Upon entry, destLen is the total
destinyXfate 2:0e2ef1edf01b 1014 size of the destination buffer, which must be at least the value returned
destinyXfate 2:0e2ef1edf01b 1015 by compressBound(sourceLen). Upon exit, destLen is the actual size of the
destinyXfate 2:0e2ef1edf01b 1016 compressed buffer.
destinyXfate 2:0e2ef1edf01b 1017 This function can be used to compress a whole file at once if the
destinyXfate 2:0e2ef1edf01b 1018 input file is mmap'ed.
destinyXfate 2:0e2ef1edf01b 1019 compress returns Z_OK if success, Z_MEM_ERROR if there was not
destinyXfate 2:0e2ef1edf01b 1020 enough memory, Z_BUF_ERROR if there was not enough room in the output
destinyXfate 2:0e2ef1edf01b 1021 buffer.
destinyXfate 2:0e2ef1edf01b 1022 */
destinyXfate 2:0e2ef1edf01b 1023
destinyXfate 2:0e2ef1edf01b 1024 ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
destinyXfate 2:0e2ef1edf01b 1025 const Bytef *source, uLong sourceLen,
destinyXfate 2:0e2ef1edf01b 1026 int level));
destinyXfate 2:0e2ef1edf01b 1027 /*
destinyXfate 2:0e2ef1edf01b 1028 Compresses the source buffer into the destination buffer. The level
destinyXfate 2:0e2ef1edf01b 1029 parameter has the same meaning as in deflateInit. sourceLen is the byte
destinyXfate 2:0e2ef1edf01b 1030 length of the source buffer. Upon entry, destLen is the total size of the
destinyXfate 2:0e2ef1edf01b 1031 destination buffer, which must be at least the value returned by
destinyXfate 2:0e2ef1edf01b 1032 compressBound(sourceLen). Upon exit, destLen is the actual size of the
destinyXfate 2:0e2ef1edf01b 1033 compressed buffer.
destinyXfate 2:0e2ef1edf01b 1034
destinyXfate 2:0e2ef1edf01b 1035 compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
destinyXfate 2:0e2ef1edf01b 1036 memory, Z_BUF_ERROR if there was not enough room in the output buffer,
destinyXfate 2:0e2ef1edf01b 1037 Z_STREAM_ERROR if the level parameter is invalid.
destinyXfate 2:0e2ef1edf01b 1038 */
destinyXfate 2:0e2ef1edf01b 1039
destinyXfate 2:0e2ef1edf01b 1040 ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
destinyXfate 2:0e2ef1edf01b 1041 /*
destinyXfate 2:0e2ef1edf01b 1042 compressBound() returns an upper bound on the compressed size after
destinyXfate 2:0e2ef1edf01b 1043 compress() or compress2() on sourceLen bytes. It would be used before
destinyXfate 2:0e2ef1edf01b 1044 a compress() or compress2() call to allocate the destination buffer.
destinyXfate 2:0e2ef1edf01b 1045 */
destinyXfate 2:0e2ef1edf01b 1046
destinyXfate 2:0e2ef1edf01b 1047 ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
destinyXfate 2:0e2ef1edf01b 1048 const Bytef *source, uLong sourceLen));
destinyXfate 2:0e2ef1edf01b 1049 /*
destinyXfate 2:0e2ef1edf01b 1050 Decompresses the source buffer into the destination buffer. sourceLen is
destinyXfate 2:0e2ef1edf01b 1051 the byte length of the source buffer. Upon entry, destLen is the total
destinyXfate 2:0e2ef1edf01b 1052 size of the destination buffer, which must be large enough to hold the
destinyXfate 2:0e2ef1edf01b 1053 entire uncompressed data. (The size of the uncompressed data must have
destinyXfate 2:0e2ef1edf01b 1054 been saved previously by the compressor and transmitted to the decompressor
destinyXfate 2:0e2ef1edf01b 1055 by some mechanism outside the scope of this compression library.)
destinyXfate 2:0e2ef1edf01b 1056 Upon exit, destLen is the actual size of the compressed buffer.
destinyXfate 2:0e2ef1edf01b 1057 This function can be used to decompress a whole file at once if the
destinyXfate 2:0e2ef1edf01b 1058 input file is mmap'ed.
destinyXfate 2:0e2ef1edf01b 1059
destinyXfate 2:0e2ef1edf01b 1060 uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
destinyXfate 2:0e2ef1edf01b 1061 enough memory, Z_BUF_ERROR if there was not enough room in the output
destinyXfate 2:0e2ef1edf01b 1062 buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
destinyXfate 2:0e2ef1edf01b 1063 */
destinyXfate 2:0e2ef1edf01b 1064
destinyXfate 2:0e2ef1edf01b 1065
destinyXfate 2:0e2ef1edf01b 1066 typedef voidp gzFile;
destinyXfate 2:0e2ef1edf01b 1067
destinyXfate 2:0e2ef1edf01b 1068 ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
destinyXfate 2:0e2ef1edf01b 1069 /*
destinyXfate 2:0e2ef1edf01b 1070 Opens a gzip (.gz) file for reading or writing. The mode parameter
destinyXfate 2:0e2ef1edf01b 1071 is as in fopen ("rb" or "wb") but can also include a compression level
destinyXfate 2:0e2ef1edf01b 1072 ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
destinyXfate 2:0e2ef1edf01b 1073 Huffman only compression as in "wb1h", or 'R' for run-length encoding
destinyXfate 2:0e2ef1edf01b 1074 as in "wb1R". (See the description of deflateInit2 for more information
destinyXfate 2:0e2ef1edf01b 1075 about the strategy parameter.)
destinyXfate 2:0e2ef1edf01b 1076
destinyXfate 2:0e2ef1edf01b 1077 gzopen can be used to read a file which is not in gzip format; in this
destinyXfate 2:0e2ef1edf01b 1078 case gzread will directly read from the file without decompression.
destinyXfate 2:0e2ef1edf01b 1079
destinyXfate 2:0e2ef1edf01b 1080 gzopen returns NULL if the file could not be opened or if there was
destinyXfate 2:0e2ef1edf01b 1081 insufficient memory to allocate the (de)compression state; errno
destinyXfate 2:0e2ef1edf01b 1082 can be checked to distinguish the two cases (if errno is zero, the
destinyXfate 2:0e2ef1edf01b 1083 zlib error is Z_MEM_ERROR). */
destinyXfate 2:0e2ef1edf01b 1084
destinyXfate 2:0e2ef1edf01b 1085 ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
destinyXfate 2:0e2ef1edf01b 1086 /*
destinyXfate 2:0e2ef1edf01b 1087 gzdopen() associates a gzFile with the file descriptor fd. File
destinyXfate 2:0e2ef1edf01b 1088 descriptors are obtained from calls like open, dup, creat, pipe or
destinyXfate 2:0e2ef1edf01b 1089 fileno (in the file has been previously opened with fopen).
destinyXfate 2:0e2ef1edf01b 1090 The mode parameter is as in gzopen.
destinyXfate 2:0e2ef1edf01b 1091 The next call of gzclose on the returned gzFile will also close the
destinyXfate 2:0e2ef1edf01b 1092 file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
destinyXfate 2:0e2ef1edf01b 1093 descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
destinyXfate 2:0e2ef1edf01b 1094 gzdopen returns NULL if there was insufficient memory to allocate
destinyXfate 2:0e2ef1edf01b 1095 the (de)compression state.
destinyXfate 2:0e2ef1edf01b 1096 */
destinyXfate 2:0e2ef1edf01b 1097
destinyXfate 2:0e2ef1edf01b 1098 ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
destinyXfate 2:0e2ef1edf01b 1099 /*
destinyXfate 2:0e2ef1edf01b 1100 Dynamically update the compression level or strategy. See the description
destinyXfate 2:0e2ef1edf01b 1101 of deflateInit2 for the meaning of these parameters.
destinyXfate 2:0e2ef1edf01b 1102 gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
destinyXfate 2:0e2ef1edf01b 1103 opened for writing.
destinyXfate 2:0e2ef1edf01b 1104 */
destinyXfate 2:0e2ef1edf01b 1105
destinyXfate 2:0e2ef1edf01b 1106 ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
destinyXfate 2:0e2ef1edf01b 1107 /*
destinyXfate 2:0e2ef1edf01b 1108 Reads the given number of uncompressed bytes from the compressed file.
destinyXfate 2:0e2ef1edf01b 1109 If the input file was not in gzip format, gzread copies the given number
destinyXfate 2:0e2ef1edf01b 1110 of bytes into the buffer.
destinyXfate 2:0e2ef1edf01b 1111 gzread returns the number of uncompressed bytes actually read (0 for
destinyXfate 2:0e2ef1edf01b 1112 end of file, -1 for error). */
destinyXfate 2:0e2ef1edf01b 1113
destinyXfate 2:0e2ef1edf01b 1114 ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
destinyXfate 2:0e2ef1edf01b 1115 voidpc buf, unsigned len));
destinyXfate 2:0e2ef1edf01b 1116 /*
destinyXfate 2:0e2ef1edf01b 1117 Writes the given number of uncompressed bytes into the compressed file.
destinyXfate 2:0e2ef1edf01b 1118 gzwrite returns the number of uncompressed bytes actually written
destinyXfate 2:0e2ef1edf01b 1119 (0 in case of error).
destinyXfate 2:0e2ef1edf01b 1120 */
destinyXfate 2:0e2ef1edf01b 1121
destinyXfate 2:0e2ef1edf01b 1122 ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
destinyXfate 2:0e2ef1edf01b 1123 /*
destinyXfate 2:0e2ef1edf01b 1124 Converts, formats, and writes the args to the compressed file under
destinyXfate 2:0e2ef1edf01b 1125 control of the format string, as in fprintf. gzprintf returns the number of
destinyXfate 2:0e2ef1edf01b 1126 uncompressed bytes actually written (0 in case of error). The number of
destinyXfate 2:0e2ef1edf01b 1127 uncompressed bytes written is limited to 4095. The caller should assure that
destinyXfate 2:0e2ef1edf01b 1128 this limit is not exceeded. If it is exceeded, then gzprintf() will return
destinyXfate 2:0e2ef1edf01b 1129 return an error (0) with nothing written. In this case, there may also be a
destinyXfate 2:0e2ef1edf01b 1130 buffer overflow with unpredictable consequences, which is possible only if
destinyXfate 2:0e2ef1edf01b 1131 zlib was compiled with the insecure functions sprintf() or vsprintf()
destinyXfate 2:0e2ef1edf01b 1132 because the secure snprintf() or vsnprintf() functions were not available.
destinyXfate 2:0e2ef1edf01b 1133 */
destinyXfate 2:0e2ef1edf01b 1134
destinyXfate 2:0e2ef1edf01b 1135 ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
destinyXfate 2:0e2ef1edf01b 1136 /*
destinyXfate 2:0e2ef1edf01b 1137 Writes the given null-terminated string to the compressed file, excluding
destinyXfate 2:0e2ef1edf01b 1138 the terminating null character.
destinyXfate 2:0e2ef1edf01b 1139 gzputs returns the number of characters written, or -1 in case of error.
destinyXfate 2:0e2ef1edf01b 1140 */
destinyXfate 2:0e2ef1edf01b 1141
destinyXfate 2:0e2ef1edf01b 1142 ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
destinyXfate 2:0e2ef1edf01b 1143 /*
destinyXfate 2:0e2ef1edf01b 1144 Reads bytes from the compressed file until len-1 characters are read, or
destinyXfate 2:0e2ef1edf01b 1145 a newline character is read and transferred to buf, or an end-of-file
destinyXfate 2:0e2ef1edf01b 1146 condition is encountered. The string is then terminated with a null
destinyXfate 2:0e2ef1edf01b 1147 character.
destinyXfate 2:0e2ef1edf01b 1148 gzgets returns buf, or Z_NULL in case of error.
destinyXfate 2:0e2ef1edf01b 1149 */
destinyXfate 2:0e2ef1edf01b 1150
destinyXfate 2:0e2ef1edf01b 1151 ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
destinyXfate 2:0e2ef1edf01b 1152 /*
destinyXfate 2:0e2ef1edf01b 1153 Writes c, converted to an unsigned char, into the compressed file.
destinyXfate 2:0e2ef1edf01b 1154 gzputc returns the value that was written, or -1 in case of error.
destinyXfate 2:0e2ef1edf01b 1155 */
destinyXfate 2:0e2ef1edf01b 1156
destinyXfate 2:0e2ef1edf01b 1157 ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1158 /*
destinyXfate 2:0e2ef1edf01b 1159 Reads one byte from the compressed file. gzgetc returns this byte
destinyXfate 2:0e2ef1edf01b 1160 or -1 in case of end of file or error.
destinyXfate 2:0e2ef1edf01b 1161 */
destinyXfate 2:0e2ef1edf01b 1162
destinyXfate 2:0e2ef1edf01b 1163 ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
destinyXfate 2:0e2ef1edf01b 1164 /*
destinyXfate 2:0e2ef1edf01b 1165 Push one character back onto the stream to be read again later.
destinyXfate 2:0e2ef1edf01b 1166 Only one character of push-back is allowed. gzungetc() returns the
destinyXfate 2:0e2ef1edf01b 1167 character pushed, or -1 on failure. gzungetc() will fail if a
destinyXfate 2:0e2ef1edf01b 1168 character has been pushed but not read yet, or if c is -1. The pushed
destinyXfate 2:0e2ef1edf01b 1169 character will be discarded if the stream is repositioned with gzseek()
destinyXfate 2:0e2ef1edf01b 1170 or gzrewind().
destinyXfate 2:0e2ef1edf01b 1171 */
destinyXfate 2:0e2ef1edf01b 1172
destinyXfate 2:0e2ef1edf01b 1173 ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
destinyXfate 2:0e2ef1edf01b 1174 /*
destinyXfate 2:0e2ef1edf01b 1175 Flushes all pending output into the compressed file. The parameter
destinyXfate 2:0e2ef1edf01b 1176 flush is as in the deflate() function. The return value is the zlib
destinyXfate 2:0e2ef1edf01b 1177 error number (see function gzerror below). gzflush returns Z_OK if
destinyXfate 2:0e2ef1edf01b 1178 the flush parameter is Z_FINISH and all output could be flushed.
destinyXfate 2:0e2ef1edf01b 1179 gzflush should be called only when strictly necessary because it can
destinyXfate 2:0e2ef1edf01b 1180 degrade compression.
destinyXfate 2:0e2ef1edf01b 1181 */
destinyXfate 2:0e2ef1edf01b 1182
destinyXfate 2:0e2ef1edf01b 1183 ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
destinyXfate 2:0e2ef1edf01b 1184 z_off_t offset, int whence));
destinyXfate 2:0e2ef1edf01b 1185 /*
destinyXfate 2:0e2ef1edf01b 1186 Sets the starting position for the next gzread or gzwrite on the
destinyXfate 2:0e2ef1edf01b 1187 given compressed file. The offset represents a number of bytes in the
destinyXfate 2:0e2ef1edf01b 1188 uncompressed data stream. The whence parameter is defined as in lseek(2);
destinyXfate 2:0e2ef1edf01b 1189 the value SEEK_END is not supported.
destinyXfate 2:0e2ef1edf01b 1190 If the file is opened for reading, this function is emulated but can be
destinyXfate 2:0e2ef1edf01b 1191 extremely slow. If the file is opened for writing, only forward seeks are
destinyXfate 2:0e2ef1edf01b 1192 supported; gzseek then compresses a sequence of zeroes up to the new
destinyXfate 2:0e2ef1edf01b 1193 starting position.
destinyXfate 2:0e2ef1edf01b 1194
destinyXfate 2:0e2ef1edf01b 1195 gzseek returns the resulting offset location as measured in bytes from
destinyXfate 2:0e2ef1edf01b 1196 the beginning of the uncompressed stream, or -1 in case of error, in
destinyXfate 2:0e2ef1edf01b 1197 particular if the file is opened for writing and the new starting position
destinyXfate 2:0e2ef1edf01b 1198 would be before the current position.
destinyXfate 2:0e2ef1edf01b 1199 */
destinyXfate 2:0e2ef1edf01b 1200
destinyXfate 2:0e2ef1edf01b 1201 ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1202 /*
destinyXfate 2:0e2ef1edf01b 1203 Rewinds the given file. This function is supported only for reading.
destinyXfate 2:0e2ef1edf01b 1204
destinyXfate 2:0e2ef1edf01b 1205 gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
destinyXfate 2:0e2ef1edf01b 1206 */
destinyXfate 2:0e2ef1edf01b 1207
destinyXfate 2:0e2ef1edf01b 1208 ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1209 /*
destinyXfate 2:0e2ef1edf01b 1210 Returns the starting position for the next gzread or gzwrite on the
destinyXfate 2:0e2ef1edf01b 1211 given compressed file. This position represents a number of bytes in the
destinyXfate 2:0e2ef1edf01b 1212 uncompressed data stream.
destinyXfate 2:0e2ef1edf01b 1213
destinyXfate 2:0e2ef1edf01b 1214 gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
destinyXfate 2:0e2ef1edf01b 1215 */
destinyXfate 2:0e2ef1edf01b 1216
destinyXfate 2:0e2ef1edf01b 1217 ZEXTERN int ZEXPORT gzeof OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1218 /*
destinyXfate 2:0e2ef1edf01b 1219 Returns 1 when EOF has previously been detected reading the given
destinyXfate 2:0e2ef1edf01b 1220 input stream, otherwise zero.
destinyXfate 2:0e2ef1edf01b 1221 */
destinyXfate 2:0e2ef1edf01b 1222
destinyXfate 2:0e2ef1edf01b 1223 ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1224 /*
destinyXfate 2:0e2ef1edf01b 1225 Returns 1 if file is being read directly without decompression, otherwise
destinyXfate 2:0e2ef1edf01b 1226 zero.
destinyXfate 2:0e2ef1edf01b 1227 */
destinyXfate 2:0e2ef1edf01b 1228
destinyXfate 2:0e2ef1edf01b 1229 ZEXTERN int ZEXPORT gzclose OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1230 /*
destinyXfate 2:0e2ef1edf01b 1231 Flushes all pending output if necessary, closes the compressed file
destinyXfate 2:0e2ef1edf01b 1232 and deallocates all the (de)compression state. The return value is the zlib
destinyXfate 2:0e2ef1edf01b 1233 error number (see function gzerror below).
destinyXfate 2:0e2ef1edf01b 1234 */
destinyXfate 2:0e2ef1edf01b 1235
destinyXfate 2:0e2ef1edf01b 1236 ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
destinyXfate 2:0e2ef1edf01b 1237 /*
destinyXfate 2:0e2ef1edf01b 1238 Returns the error message for the last error which occurred on the
destinyXfate 2:0e2ef1edf01b 1239 given compressed file. errnum is set to zlib error number. If an
destinyXfate 2:0e2ef1edf01b 1240 error occurred in the file system and not in the compression library,
destinyXfate 2:0e2ef1edf01b 1241 errnum is set to Z_ERRNO and the application may consult errno
destinyXfate 2:0e2ef1edf01b 1242 to get the exact error code.
destinyXfate 2:0e2ef1edf01b 1243 */
destinyXfate 2:0e2ef1edf01b 1244
destinyXfate 2:0e2ef1edf01b 1245 ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
destinyXfate 2:0e2ef1edf01b 1246 /*
destinyXfate 2:0e2ef1edf01b 1247 Clears the error and end-of-file flags for file. This is analogous to the
destinyXfate 2:0e2ef1edf01b 1248 clearerr() function in stdio. This is useful for continuing to read a gzip
destinyXfate 2:0e2ef1edf01b 1249 file that is being written concurrently.
destinyXfate 2:0e2ef1edf01b 1250 */
destinyXfate 2:0e2ef1edf01b 1251
destinyXfate 2:0e2ef1edf01b 1252 /* checksum functions */
destinyXfate 2:0e2ef1edf01b 1253
destinyXfate 2:0e2ef1edf01b 1254 /*
destinyXfate 2:0e2ef1edf01b 1255 These functions are not related to compression but are exported
destinyXfate 2:0e2ef1edf01b 1256 anyway because they might be useful in applications using the
destinyXfate 2:0e2ef1edf01b 1257 compression library.
destinyXfate 2:0e2ef1edf01b 1258 */
destinyXfate 2:0e2ef1edf01b 1259
destinyXfate 2:0e2ef1edf01b 1260 ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
destinyXfate 2:0e2ef1edf01b 1261 /*
destinyXfate 2:0e2ef1edf01b 1262 Update a running Adler-32 checksum with the bytes buf[0..len-1] and
destinyXfate 2:0e2ef1edf01b 1263 return the updated checksum. If buf is NULL, this function returns
destinyXfate 2:0e2ef1edf01b 1264 the required initial value for the checksum.
destinyXfate 2:0e2ef1edf01b 1265 An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
destinyXfate 2:0e2ef1edf01b 1266 much faster. Usage example:
destinyXfate 2:0e2ef1edf01b 1267
destinyXfate 2:0e2ef1edf01b 1268 uLong adler = adler32(0L, Z_NULL, 0);
destinyXfate 2:0e2ef1edf01b 1269
destinyXfate 2:0e2ef1edf01b 1270 while (read_buffer(buffer, length) != EOF) {
destinyXfate 2:0e2ef1edf01b 1271 adler = adler32(adler, buffer, length);
destinyXfate 2:0e2ef1edf01b 1272 }
destinyXfate 2:0e2ef1edf01b 1273 if (adler != original_adler) error();
destinyXfate 2:0e2ef1edf01b 1274 */
destinyXfate 2:0e2ef1edf01b 1275
destinyXfate 2:0e2ef1edf01b 1276 ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
destinyXfate 2:0e2ef1edf01b 1277 z_off_t len2));
destinyXfate 2:0e2ef1edf01b 1278 /*
destinyXfate 2:0e2ef1edf01b 1279 Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
destinyXfate 2:0e2ef1edf01b 1280 and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
destinyXfate 2:0e2ef1edf01b 1281 each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
destinyXfate 2:0e2ef1edf01b 1282 seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
destinyXfate 2:0e2ef1edf01b 1283 */
destinyXfate 2:0e2ef1edf01b 1284
destinyXfate 2:0e2ef1edf01b 1285 ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
destinyXfate 2:0e2ef1edf01b 1286 /*
destinyXfate 2:0e2ef1edf01b 1287 Update a running CRC-32 with the bytes buf[0..len-1] and return the
destinyXfate 2:0e2ef1edf01b 1288 updated CRC-32. If buf is NULL, this function returns the required initial
destinyXfate 2:0e2ef1edf01b 1289 value for the for the crc. Pre- and post-conditioning (one's complement) is
destinyXfate 2:0e2ef1edf01b 1290 performed within this function so it shouldn't be done by the application.
destinyXfate 2:0e2ef1edf01b 1291 Usage example:
destinyXfate 2:0e2ef1edf01b 1292
destinyXfate 2:0e2ef1edf01b 1293 uLong crc = crc32(0L, Z_NULL, 0);
destinyXfate 2:0e2ef1edf01b 1294
destinyXfate 2:0e2ef1edf01b 1295 while (read_buffer(buffer, length) != EOF) {
destinyXfate 2:0e2ef1edf01b 1296 crc = crc32(crc, buffer, length);
destinyXfate 2:0e2ef1edf01b 1297 }
destinyXfate 2:0e2ef1edf01b 1298 if (crc != original_crc) error();
destinyXfate 2:0e2ef1edf01b 1299 */
destinyXfate 2:0e2ef1edf01b 1300
destinyXfate 2:0e2ef1edf01b 1301 ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
destinyXfate 2:0e2ef1edf01b 1302
destinyXfate 2:0e2ef1edf01b 1303 /*
destinyXfate 2:0e2ef1edf01b 1304 Combine two CRC-32 check values into one. For two sequences of bytes,
destinyXfate 2:0e2ef1edf01b 1305 seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
destinyXfate 2:0e2ef1edf01b 1306 calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32
destinyXfate 2:0e2ef1edf01b 1307 check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
destinyXfate 2:0e2ef1edf01b 1308 len2.
destinyXfate 2:0e2ef1edf01b 1309 */
destinyXfate 2:0e2ef1edf01b 1310
destinyXfate 2:0e2ef1edf01b 1311
destinyXfate 2:0e2ef1edf01b 1312 /* various hacks, don't look :) */
destinyXfate 2:0e2ef1edf01b 1313
destinyXfate 2:0e2ef1edf01b 1314 /* deflateInit and inflateInit are macros to allow checking the zlib version
destinyXfate 2:0e2ef1edf01b 1315 * and the compiler's view of z_stream:
destinyXfate 2:0e2ef1edf01b 1316 */
destinyXfate 2:0e2ef1edf01b 1317 ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
destinyXfate 2:0e2ef1edf01b 1318 const char *version, int stream_size));
destinyXfate 2:0e2ef1edf01b 1319 ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
destinyXfate 2:0e2ef1edf01b 1320 const char *version, int stream_size));
destinyXfate 2:0e2ef1edf01b 1321 ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
destinyXfate 2:0e2ef1edf01b 1322 int windowBits, int memLevel,
destinyXfate 2:0e2ef1edf01b 1323 int strategy, const char *version,
destinyXfate 2:0e2ef1edf01b 1324 int stream_size));
destinyXfate 2:0e2ef1edf01b 1325 ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
destinyXfate 2:0e2ef1edf01b 1326 const char *version, int stream_size));
destinyXfate 2:0e2ef1edf01b 1327 ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
destinyXfate 2:0e2ef1edf01b 1328 unsigned char FAR *window,
destinyXfate 2:0e2ef1edf01b 1329 const char *version,
destinyXfate 2:0e2ef1edf01b 1330 int stream_size));
destinyXfate 2:0e2ef1edf01b 1331 #define deflateInit(strm, level) \
destinyXfate 2:0e2ef1edf01b 1332 deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
destinyXfate 2:0e2ef1edf01b 1333 #define inflateInit(strm) \
destinyXfate 2:0e2ef1edf01b 1334 inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
destinyXfate 2:0e2ef1edf01b 1335 #define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
destinyXfate 2:0e2ef1edf01b 1336 deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
destinyXfate 2:0e2ef1edf01b 1337 (strategy), ZLIB_VERSION, sizeof(z_stream))
destinyXfate 2:0e2ef1edf01b 1338 #define inflateInit2(strm, windowBits) \
destinyXfate 2:0e2ef1edf01b 1339 inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
destinyXfate 2:0e2ef1edf01b 1340 #define inflateBackInit(strm, windowBits, window) \
destinyXfate 2:0e2ef1edf01b 1341 inflateBackInit_((strm), (windowBits), (window), \
destinyXfate 2:0e2ef1edf01b 1342 ZLIB_VERSION, sizeof(z_stream))
destinyXfate 2:0e2ef1edf01b 1343
destinyXfate 2:0e2ef1edf01b 1344
destinyXfate 2:0e2ef1edf01b 1345 #if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
destinyXfate 2:0e2ef1edf01b 1346 struct internal_state {int dummy;}; /* hack for buggy compilers */
destinyXfate 2:0e2ef1edf01b 1347 #endif
destinyXfate 2:0e2ef1edf01b 1348
destinyXfate 2:0e2ef1edf01b 1349 ZEXTERN const char * ZEXPORT zError OF((int));
destinyXfate 2:0e2ef1edf01b 1350 ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
destinyXfate 2:0e2ef1edf01b 1351 ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
destinyXfate 2:0e2ef1edf01b 1352
destinyXfate 2:0e2ef1edf01b 1353 #ifdef __cplusplus
destinyXfate 2:0e2ef1edf01b 1354 }
destinyXfate 2:0e2ef1edf01b 1355 #endif
destinyXfate 2:0e2ef1edf01b 1356
destinyXfate 2:0e2ef1edf01b 1357 #endif /* ZLIB_H */
destinyXfate 2:0e2ef1edf01b 1358