author | sherman |
Wed, 04 Jun 2014 11:25:13 -0700 | |
changeset 24710 | c019dc4104b2 |
permissions | -rw-r--r-- |
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/* |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* zlib.h -- interface of the 'zlib' general purpose compression library |
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version 1.2.8, April 28th, 2013 |
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|
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Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler |
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|
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This software is provided 'as-is', without any express or implied |
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warranty. In no event will the authors be held liable for any damages |
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arising from the use of this software. |
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|
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Permission is granted to anyone to use this software for any purpose, |
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including commercial applications, and to alter it and redistribute it |
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freely, subject to the following restrictions: |
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|
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1. The origin of this software must not be misrepresented; you must not |
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claim that you wrote the original software. If you use this software |
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in a product, an acknowledgment in the product documentation would be |
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appreciated but is not required. |
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2. Altered source versions must be plainly marked as such, and must not be |
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misrepresented as being the original software. |
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3. This notice may not be removed or altered from any source distribution. |
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Jean-loup Gailly Mark Adler |
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jloup@gzip.org madler@alumni.caltech.edu |
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|
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The data format used by the zlib library is described by RFCs (Request for |
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Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950 |
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(zlib format), rfc1951 (deflate format) and rfc1952 (gzip format). |
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*/ |
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#ifndef ZLIB_H |
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#define ZLIB_H |
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#include "zconf.h" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define ZLIB_VERSION "1.2.8" |
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#define ZLIB_VERNUM 0x1280 |
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#define ZLIB_VER_MAJOR 1 |
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#define ZLIB_VER_MINOR 2 |
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#define ZLIB_VER_REVISION 8 |
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#define ZLIB_VER_SUBREVISION 0 |
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/* |
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The 'zlib' compression library provides in-memory compression and |
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decompression functions, including integrity checks of the uncompressed data. |
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This version of the library supports only one compression method (deflation) |
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but other algorithms will be added later and will have the same stream |
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interface. |
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Compression can be done in a single step if the buffers are large enough, |
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or can be done by repeated calls of the compression function. In the latter |
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case, the application must provide more input and/or consume the output |
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(providing more output space) before each call. |
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|
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The compressed data format used by default by the in-memory functions is |
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the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped |
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around a deflate stream, which is itself documented in RFC 1951. |
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|
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The library also supports reading and writing files in gzip (.gz) format |
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with an interface similar to that of stdio using the functions that start |
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with "gz". The gzip format is different from the zlib format. gzip is a |
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gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. |
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This library can optionally read and write gzip streams in memory as well. |
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|
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The zlib format was designed to be compact and fast for use in memory |
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and on communications channels. The gzip format was designed for single- |
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file compression on file systems, has a larger header than zlib to maintain |
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directory information, and uses a different, slower check method than zlib. |
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The library does not install any signal handler. The decoder checks |
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the consistency of the compressed data, so the library should never crash |
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even in case of corrupted input. |
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*/ |
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typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); |
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typedef void (*free_func) OF((voidpf opaque, voidpf address)); |
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struct internal_state; |
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typedef struct z_stream_s { |
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z_const Bytef *next_in; /* next input byte */ |
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uInt avail_in; /* number of bytes available at next_in */ |
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uLong total_in; /* total number of input bytes read so far */ |
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Bytef *next_out; /* next output byte should be put there */ |
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uInt avail_out; /* remaining free space at next_out */ |
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uLong total_out; /* total number of bytes output so far */ |
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z_const char *msg; /* last error message, NULL if no error */ |
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struct internal_state FAR *state; /* not visible by applications */ |
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alloc_func zalloc; /* used to allocate the internal state */ |
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free_func zfree; /* used to free the internal state */ |
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voidpf opaque; /* private data object passed to zalloc and zfree */ |
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124 |
|
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int data_type; /* best guess about the data type: binary or text */ |
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uLong adler; /* adler32 value of the uncompressed data */ |
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uLong reserved; /* reserved for future use */ |
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} z_stream; |
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129 |
|
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typedef z_stream FAR *z_streamp; |
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131 |
|
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/* |
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gzip header information passed to and from zlib routines. See RFC 1952 |
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134 |
for more details on the meanings of these fields. |
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135 |
*/ |
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typedef struct gz_header_s { |
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int text; /* true if compressed data believed to be text */ |
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uLong time; /* modification time */ |
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int xflags; /* extra flags (not used when writing a gzip file) */ |
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int os; /* operating system */ |
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Bytef *extra; /* pointer to extra field or Z_NULL if none */ |
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uInt extra_len; /* extra field length (valid if extra != Z_NULL) */ |
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uInt extra_max; /* space at extra (only when reading header) */ |
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Bytef *name; /* pointer to zero-terminated file name or Z_NULL */ |
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uInt name_max; /* space at name (only when reading header) */ |
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146 |
Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */ |
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147 |
uInt comm_max; /* space at comment (only when reading header) */ |
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148 |
int hcrc; /* true if there was or will be a header crc */ |
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149 |
int done; /* true when done reading gzip header (not used |
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when writing a gzip file) */ |
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151 |
} gz_header; |
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152 |
|
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153 |
typedef gz_header FAR *gz_headerp; |
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154 |
|
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155 |
/* |
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156 |
The application must update next_in and avail_in when avail_in has dropped |
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157 |
to zero. It must update next_out and avail_out when avail_out has dropped |
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158 |
to zero. The application must initialize zalloc, zfree and opaque before |
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159 |
calling the init function. All other fields are set by the compression |
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160 |
library and must not be updated by the application. |
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161 |
|
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162 |
The opaque value provided by the application will be passed as the first |
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163 |
parameter for calls of zalloc and zfree. This can be useful for custom |
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164 |
memory management. The compression library attaches no meaning to the |
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165 |
opaque value. |
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166 |
|
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167 |
zalloc must return Z_NULL if there is not enough memory for the object. |
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168 |
If zlib is used in a multi-threaded application, zalloc and zfree must be |
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169 |
thread safe. |
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170 |
|
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171 |
On 16-bit systems, the functions zalloc and zfree must be able to allocate |
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172 |
exactly 65536 bytes, but will not be required to allocate more than this if |
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173 |
the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers |
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174 |
returned by zalloc for objects of exactly 65536 bytes *must* have their |
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175 |
offset normalized to zero. The default allocation function provided by this |
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176 |
library ensures this (see zutil.c). To reduce memory requirements and avoid |
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177 |
any allocation of 64K objects, at the expense of compression ratio, compile |
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178 |
the library with -DMAX_WBITS=14 (see zconf.h). |
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179 |
|
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180 |
The fields total_in and total_out can be used for statistics or progress |
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181 |
reports. After compression, total_in holds the total size of the |
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182 |
uncompressed data and may be saved for use in the decompressor (particularly |
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183 |
if the decompressor wants to decompress everything in a single step). |
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184 |
*/ |
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185 |
|
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186 |
/* constants */ |
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187 |
|
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188 |
#define Z_NO_FLUSH 0 |
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189 |
#define Z_PARTIAL_FLUSH 1 |
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190 |
#define Z_SYNC_FLUSH 2 |
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191 |
#define Z_FULL_FLUSH 3 |
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192 |
#define Z_FINISH 4 |
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193 |
#define Z_BLOCK 5 |
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194 |
#define Z_TREES 6 |
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195 |
/* Allowed flush values; see deflate() and inflate() below for details */ |
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196 |
|
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197 |
#define Z_OK 0 |
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198 |
#define Z_STREAM_END 1 |
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199 |
#define Z_NEED_DICT 2 |
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200 |
#define Z_ERRNO (-1) |
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201 |
#define Z_STREAM_ERROR (-2) |
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202 |
#define Z_DATA_ERROR (-3) |
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203 |
#define Z_MEM_ERROR (-4) |
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204 |
#define Z_BUF_ERROR (-5) |
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205 |
#define Z_VERSION_ERROR (-6) |
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206 |
/* Return codes for the compression/decompression functions. Negative values |
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207 |
* are errors, positive values are used for special but normal events. |
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208 |
*/ |
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209 |
|
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210 |
#define Z_NO_COMPRESSION 0 |
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211 |
#define Z_BEST_SPEED 1 |
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212 |
#define Z_BEST_COMPRESSION 9 |
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213 |
#define Z_DEFAULT_COMPRESSION (-1) |
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214 |
/* compression levels */ |
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215 |
|
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216 |
#define Z_FILTERED 1 |
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217 |
#define Z_HUFFMAN_ONLY 2 |
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218 |
#define Z_RLE 3 |
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219 |
#define Z_FIXED 4 |
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220 |
#define Z_DEFAULT_STRATEGY 0 |
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221 |
/* compression strategy; see deflateInit2() below for details */ |
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222 |
|
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223 |
#define Z_BINARY 0 |
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224 |
#define Z_TEXT 1 |
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225 |
#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ |
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226 |
#define Z_UNKNOWN 2 |
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227 |
/* Possible values of the data_type field (though see inflate()) */ |
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228 |
|
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229 |
#define Z_DEFLATED 8 |
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230 |
/* The deflate compression method (the only one supported in this version) */ |
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231 |
|
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232 |
#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ |
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233 |
|
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234 |
#define zlib_version zlibVersion() |
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235 |
/* for compatibility with versions < 1.0.2 */ |
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236 |
|
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237 |
|
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238 |
/* basic functions */ |
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239 |
|
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240 |
ZEXTERN const char * ZEXPORT zlibVersion OF((void)); |
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241 |
/* The application can compare zlibVersion and ZLIB_VERSION for consistency. |
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If the first character differs, the library code actually used is not |
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compatible with the zlib.h header file used by the application. This check |
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is automatically made by deflateInit and inflateInit. |
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*/ |
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246 |
|
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/* |
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ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); |
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249 |
|
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Initializes the internal stream state for compression. The fields |
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zalloc, zfree and opaque must be initialized before by the caller. If |
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zalloc and zfree are set to Z_NULL, deflateInit updates them to use default |
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253 |
allocation functions. |
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254 |
|
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The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: |
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1 gives best speed, 9 gives best compression, 0 gives no compression at all |
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(the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION |
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258 |
requests a default compromise between speed and compression (currently |
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equivalent to level 6). |
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260 |
|
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deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough |
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memory, Z_STREAM_ERROR if level is not a valid compression level, or |
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Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible |
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with the version assumed by the caller (ZLIB_VERSION). msg is set to null |
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if there is no error message. deflateInit does not perform any compression: |
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this will be done by deflate(). |
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*/ |
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268 |
|
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269 |
|
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ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); |
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/* |
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deflate compresses as much data as possible, and stops when the input |
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buffer becomes empty or the output buffer becomes full. It may introduce |
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274 |
some output latency (reading input without producing any output) except when |
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forced to flush. |
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276 |
|
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The detailed semantics are as follows. deflate performs one or both of the |
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278 |
following actions: |
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279 |
|
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- Compress more input starting at next_in and update next_in and avail_in |
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281 |
accordingly. If not all input can be processed (because there is not |
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282 |
enough room in the output buffer), next_in and avail_in are updated and |
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processing will resume at this point for the next call of deflate(). |
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284 |
|
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- Provide more output starting at next_out and update next_out and avail_out |
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286 |
accordingly. This action is forced if the parameter flush is non zero. |
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287 |
Forcing flush frequently degrades the compression ratio, so this parameter |
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288 |
should be set only when necessary (in interactive applications). Some |
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289 |
output may be provided even if flush is not set. |
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290 |
|
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291 |
Before the call of deflate(), the application should ensure that at least |
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292 |
one of the actions is possible, by providing more input and/or consuming more |
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293 |
output, and updating avail_in or avail_out accordingly; avail_out should |
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294 |
never be zero before the call. The application can consume the compressed |
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295 |
output when it wants, for example when the output buffer is full (avail_out |
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296 |
== 0), or after each call of deflate(). If deflate returns Z_OK and with |
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297 |
zero avail_out, it must be called again after making room in the output |
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298 |
buffer because there might be more output pending. |
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299 |
|
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300 |
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to |
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301 |
decide how much data to accumulate before producing output, in order to |
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302 |
maximize compression. |
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303 |
|
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304 |
If the parameter flush is set to Z_SYNC_FLUSH, all pending output is |
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305 |
flushed to the output buffer and the output is aligned on a byte boundary, so |
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306 |
that the decompressor can get all input data available so far. (In |
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307 |
particular avail_in is zero after the call if enough output space has been |
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308 |
provided before the call.) Flushing may degrade compression for some |
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309 |
compression algorithms and so it should be used only when necessary. This |
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310 |
completes the current deflate block and follows it with an empty stored block |
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311 |
that is three bits plus filler bits to the next byte, followed by four bytes |
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312 |
(00 00 ff ff). |
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313 |
|
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314 |
If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the |
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|
315 |
output buffer, but the output is not aligned to a byte boundary. All of the |
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316 |
input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. |
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317 |
This completes the current deflate block and follows it with an empty fixed |
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|
318 |
codes block that is 10 bits long. This assures that enough bytes are output |
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|
319 |
in order for the decompressor to finish the block before the empty fixed code |
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|
320 |
block. |
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|
321 |
|
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322 |
If flush is set to Z_BLOCK, a deflate block is completed and emitted, as |
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|
323 |
for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to |
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324 |
seven bits of the current block are held to be written as the next byte after |
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|
325 |
the next deflate block is completed. In this case, the decompressor may not |
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326 |
be provided enough bits at this point in order to complete decompression of |
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327 |
the data provided so far to the compressor. It may need to wait for the next |
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328 |
block to be emitted. This is for advanced applications that need to control |
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|
329 |
the emission of deflate blocks. |
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|
330 |
|
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331 |
If flush is set to Z_FULL_FLUSH, all output is flushed as with |
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332 |
Z_SYNC_FLUSH, and the compression state is reset so that decompression can |
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333 |
restart from this point if previous compressed data has been damaged or if |
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|
334 |
random access is desired. Using Z_FULL_FLUSH too often can seriously degrade |
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|
335 |
compression. |
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|
336 |
|
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337 |
If deflate returns with avail_out == 0, this function must be called again |
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|
338 |
with the same value of the flush parameter and more output space (updated |
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|
339 |
avail_out), until the flush is complete (deflate returns with non-zero |
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|
340 |
avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that |
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341 |
avail_out is greater than six to avoid repeated flush markers due to |
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|
342 |
avail_out == 0 on return. |
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|
343 |
|
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344 |
If the parameter flush is set to Z_FINISH, pending input is processed, |
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345 |
pending output is flushed and deflate returns with Z_STREAM_END if there was |
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|
346 |
enough output space; if deflate returns with Z_OK, this function must be |
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|
347 |
called again with Z_FINISH and more output space (updated avail_out) but no |
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348 |
more input data, until it returns with Z_STREAM_END or an error. After |
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|
349 |
deflate has returned Z_STREAM_END, the only possible operations on the stream |
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|
350 |
are deflateReset or deflateEnd. |
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|
351 |
|
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352 |
Z_FINISH can be used immediately after deflateInit if all the compression |
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353 |
is to be done in a single step. In this case, avail_out must be at least the |
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|
354 |
value returned by deflateBound (see below). Then deflate is guaranteed to |
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|
355 |
return Z_STREAM_END. If not enough output space is provided, deflate will |
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|
356 |
not return Z_STREAM_END, and it must be called again as described above. |
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|
357 |
|
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|
358 |
deflate() sets strm->adler to the adler32 checksum of all input read |
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parents:
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|
359 |
so far (that is, total_in bytes). |
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parents:
diff
changeset
|
360 |
|
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parents:
diff
changeset
|
361 |
deflate() may update strm->data_type if it can make a good guess about |
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parents:
diff
changeset
|
362 |
the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered |
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parents:
diff
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|
363 |
binary. This field is only for information purposes and does not affect the |
c019dc4104b2
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parents:
diff
changeset
|
364 |
compression algorithm in any manner. |
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parents:
diff
changeset
|
365 |
|
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parents:
diff
changeset
|
366 |
deflate() returns Z_OK if some progress has been made (more input |
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parents:
diff
changeset
|
367 |
processed or more output produced), Z_STREAM_END if all input has been |
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parents:
diff
changeset
|
368 |
consumed and all output has been produced (only when flush is set to |
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parents:
diff
changeset
|
369 |
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example |
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parents:
diff
changeset
|
370 |
if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible |
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parents:
diff
changeset
|
371 |
(for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not |
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parents:
diff
changeset
|
372 |
fatal, and deflate() can be called again with more input and more output |
c019dc4104b2
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parents:
diff
changeset
|
373 |
space to continue compressing. |
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parents:
diff
changeset
|
374 |
*/ |
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parents:
diff
changeset
|
375 |
|
c019dc4104b2
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parents:
diff
changeset
|
376 |
|
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parents:
diff
changeset
|
377 |
ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); |
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parents:
diff
changeset
|
378 |
/* |
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parents:
diff
changeset
|
379 |
All dynamically allocated data structures for this stream are freed. |
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parents:
diff
changeset
|
380 |
This function discards any unprocessed input and does not flush any pending |
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parents:
diff
changeset
|
381 |
output. |
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parents:
diff
changeset
|
382 |
|
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parents:
diff
changeset
|
383 |
deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the |
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parents:
diff
changeset
|
384 |
stream state was inconsistent, Z_DATA_ERROR if the stream was freed |
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parents:
diff
changeset
|
385 |
prematurely (some input or output was discarded). In the error case, msg |
c019dc4104b2
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parents:
diff
changeset
|
386 |
may be set but then points to a static string (which must not be |
c019dc4104b2
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sherman
parents:
diff
changeset
|
387 |
deallocated). |
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parents:
diff
changeset
|
388 |
*/ |
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parents:
diff
changeset
|
389 |
|
c019dc4104b2
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parents:
diff
changeset
|
390 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
391 |
/* |
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parents:
diff
changeset
|
392 |
ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); |
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parents:
diff
changeset
|
393 |
|
c019dc4104b2
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parents:
diff
changeset
|
394 |
Initializes the internal stream state for decompression. The fields |
c019dc4104b2
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parents:
diff
changeset
|
395 |
next_in, avail_in, zalloc, zfree and opaque must be initialized before by |
c019dc4104b2
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parents:
diff
changeset
|
396 |
the caller. If next_in is not Z_NULL and avail_in is large enough (the |
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parents:
diff
changeset
|
397 |
exact value depends on the compression method), inflateInit determines the |
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parents:
diff
changeset
|
398 |
compression method from the zlib header and allocates all data structures |
c019dc4104b2
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parents:
diff
changeset
|
399 |
accordingly; otherwise the allocation will be deferred to the first call of |
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parents:
diff
changeset
|
400 |
inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to |
c019dc4104b2
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sherman
parents:
diff
changeset
|
401 |
use default allocation functions. |
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sherman
parents:
diff
changeset
|
402 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
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parents:
diff
changeset
|
403 |
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough |
c019dc4104b2
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sherman
parents:
diff
changeset
|
404 |
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the |
c019dc4104b2
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sherman
parents:
diff
changeset
|
405 |
version assumed by the caller, or Z_STREAM_ERROR if the parameters are |
c019dc4104b2
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parents:
diff
changeset
|
406 |
invalid, such as a null pointer to the structure. msg is set to null if |
c019dc4104b2
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sherman
parents:
diff
changeset
|
407 |
there is no error message. inflateInit does not perform any decompression |
c019dc4104b2
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parents:
diff
changeset
|
408 |
apart from possibly reading the zlib header if present: actual decompression |
c019dc4104b2
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parents:
diff
changeset
|
409 |
will be done by inflate(). (So next_in and avail_in may be modified, but |
c019dc4104b2
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sherman
parents:
diff
changeset
|
410 |
next_out and avail_out are unused and unchanged.) The current implementation |
c019dc4104b2
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parents:
diff
changeset
|
411 |
of inflateInit() does not process any header information -- that is deferred |
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parents:
diff
changeset
|
412 |
until inflate() is called. |
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parents:
diff
changeset
|
413 |
*/ |
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sherman
parents:
diff
changeset
|
414 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
415 |
|
c019dc4104b2
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parents:
diff
changeset
|
416 |
ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); |
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sherman
parents:
diff
changeset
|
417 |
/* |
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sherman
parents:
diff
changeset
|
418 |
inflate decompresses as much data as possible, and stops when the input |
c019dc4104b2
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sherman
parents:
diff
changeset
|
419 |
buffer becomes empty or the output buffer becomes full. It may introduce |
c019dc4104b2
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sherman
parents:
diff
changeset
|
420 |
some output latency (reading input without producing any output) except when |
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sherman
parents:
diff
changeset
|
421 |
forced to flush. |
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sherman
parents:
diff
changeset
|
422 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
423 |
The detailed semantics are as follows. inflate performs one or both of the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
424 |
following actions: |
c019dc4104b2
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sherman
parents:
diff
changeset
|
425 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
426 |
- Decompress more input starting at next_in and update next_in and avail_in |
c019dc4104b2
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sherman
parents:
diff
changeset
|
427 |
accordingly. If not all input can be processed (because there is not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
428 |
enough room in the output buffer), next_in is updated and processing will |
c019dc4104b2
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sherman
parents:
diff
changeset
|
429 |
resume at this point for the next call of inflate(). |
c019dc4104b2
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sherman
parents:
diff
changeset
|
430 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
431 |
- Provide more output starting at next_out and update next_out and avail_out |
c019dc4104b2
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sherman
parents:
diff
changeset
|
432 |
accordingly. inflate() provides as much output as possible, until there is |
c019dc4104b2
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sherman
parents:
diff
changeset
|
433 |
no more input data or no more space in the output buffer (see below about |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
434 |
the flush parameter). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
435 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
436 |
Before the call of inflate(), the application should ensure that at least |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
437 |
one of the actions is possible, by providing more input and/or consuming more |
c019dc4104b2
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sherman
parents:
diff
changeset
|
438 |
output, and updating the next_* and avail_* values accordingly. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
439 |
application can consume the uncompressed output when it wants, for example |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
440 |
when the output buffer is full (avail_out == 0), or after each call of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
441 |
inflate(). If inflate returns Z_OK and with zero avail_out, it must be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
442 |
called again after making room in the output buffer because there might be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
443 |
more output pending. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
444 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
445 |
The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH, |
c019dc4104b2
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sherman
parents:
diff
changeset
|
446 |
Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much |
c019dc4104b2
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sherman
parents:
diff
changeset
|
447 |
output as possible to the output buffer. Z_BLOCK requests that inflate() |
c019dc4104b2
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sherman
parents:
diff
changeset
|
448 |
stop if and when it gets to the next deflate block boundary. When decoding |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
449 |
the zlib or gzip format, this will cause inflate() to return immediately |
c019dc4104b2
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sherman
parents:
diff
changeset
|
450 |
after the header and before the first block. When doing a raw inflate, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
451 |
inflate() will go ahead and process the first block, and will return when it |
c019dc4104b2
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sherman
parents:
diff
changeset
|
452 |
gets to the end of that block, or when it runs out of data. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
453 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
454 |
The Z_BLOCK option assists in appending to or combining deflate streams. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
455 |
Also to assist in this, on return inflate() will set strm->data_type to the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
456 |
number of unused bits in the last byte taken from strm->next_in, plus 64 if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
457 |
inflate() is currently decoding the last block in the deflate stream, plus |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
458 |
128 if inflate() returned immediately after decoding an end-of-block code or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
459 |
decoding the complete header up to just before the first byte of the deflate |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
460 |
stream. The end-of-block will not be indicated until all of the uncompressed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
461 |
data from that block has been written to strm->next_out. The number of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
462 |
unused bits may in general be greater than seven, except when bit 7 of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
463 |
data_type is set, in which case the number of unused bits will be less than |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
464 |
eight. data_type is set as noted here every time inflate() returns for all |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
465 |
flush options, and so can be used to determine the amount of currently |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
466 |
consumed input in bits. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
467 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
468 |
The Z_TREES option behaves as Z_BLOCK does, but it also returns when the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
469 |
end of each deflate block header is reached, before any actual data in that |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
470 |
block is decoded. This allows the caller to determine the length of the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
471 |
deflate block header for later use in random access within a deflate block. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
472 |
256 is added to the value of strm->data_type when inflate() returns |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
473 |
immediately after reaching the end of the deflate block header. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
474 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
475 |
inflate() should normally be called until it returns Z_STREAM_END or an |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
476 |
error. However if all decompression is to be performed in a single step (a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
477 |
single call of inflate), the parameter flush should be set to Z_FINISH. In |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
478 |
this case all pending input is processed and all pending output is flushed; |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
479 |
avail_out must be large enough to hold all of the uncompressed data for the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
480 |
operation to complete. (The size of the uncompressed data may have been |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
481 |
saved by the compressor for this purpose.) The use of Z_FINISH is not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
482 |
required to perform an inflation in one step. However it may be used to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
483 |
inform inflate that a faster approach can be used for the single inflate() |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
484 |
call. Z_FINISH also informs inflate to not maintain a sliding window if the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
485 |
stream completes, which reduces inflate's memory footprint. If the stream |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
486 |
does not complete, either because not all of the stream is provided or not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
487 |
enough output space is provided, then a sliding window will be allocated and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
488 |
inflate() can be called again to continue the operation as if Z_NO_FLUSH had |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
489 |
been used. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
490 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
491 |
In this implementation, inflate() always flushes as much output as |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
492 |
possible to the output buffer, and always uses the faster approach on the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
493 |
first call. So the effects of the flush parameter in this implementation are |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
494 |
on the return value of inflate() as noted below, when inflate() returns early |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
495 |
when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
496 |
memory for a sliding window when Z_FINISH is used. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
497 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
498 |
If a preset dictionary is needed after this call (see inflateSetDictionary |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
499 |
below), inflate sets strm->adler to the Adler-32 checksum of the dictionary |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
500 |
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
501 |
strm->adler to the Adler-32 checksum of all output produced so far (that is, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
502 |
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
503 |
below. At the end of the stream, inflate() checks that its computed adler32 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
504 |
checksum is equal to that saved by the compressor and returns Z_STREAM_END |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
505 |
only if the checksum is correct. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
506 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
507 |
inflate() can decompress and check either zlib-wrapped or gzip-wrapped |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
508 |
deflate data. The header type is detected automatically, if requested when |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
509 |
initializing with inflateInit2(). Any information contained in the gzip |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
510 |
header is not retained, so applications that need that information should |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
511 |
instead use raw inflate, see inflateInit2() below, or inflateBack() and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
512 |
perform their own processing of the gzip header and trailer. When processing |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
513 |
gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
514 |
producted so far. The CRC-32 is checked against the gzip trailer. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
515 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
516 |
inflate() returns Z_OK if some progress has been made (more input processed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
517 |
or more output produced), Z_STREAM_END if the end of the compressed data has |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
518 |
been reached and all uncompressed output has been produced, Z_NEED_DICT if a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
519 |
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
520 |
corrupted (input stream not conforming to the zlib format or incorrect check |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
521 |
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
522 |
next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
523 |
Z_BUF_ERROR if no progress is possible or if there was not enough room in the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
524 |
output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
525 |
inflate() can be called again with more input and more output space to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
526 |
continue decompressing. If Z_DATA_ERROR is returned, the application may |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
527 |
then call inflateSync() to look for a good compression block if a partial |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
528 |
recovery of the data is desired. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
529 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
530 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
531 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
532 |
ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
533 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
534 |
All dynamically allocated data structures for this stream are freed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
535 |
This function discards any unprocessed input and does not flush any pending |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
536 |
output. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
537 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
538 |
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
539 |
was inconsistent. In the error case, msg may be set but then points to a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
540 |
static string (which must not be deallocated). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
541 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
542 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
543 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
544 |
/* Advanced functions */ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
545 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
546 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
547 |
The following functions are needed only in some special applications. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
548 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
549 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
550 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
551 |
ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
552 |
int level, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
553 |
int method, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
554 |
int windowBits, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
555 |
int memLevel, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
556 |
int strategy)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
557 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
558 |
This is another version of deflateInit with more compression options. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
559 |
fields next_in, zalloc, zfree and opaque must be initialized before by the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
560 |
caller. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
561 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
562 |
The method parameter is the compression method. It must be Z_DEFLATED in |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
563 |
this version of the library. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
564 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
565 |
The windowBits parameter is the base two logarithm of the window size |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
566 |
(the size of the history buffer). It should be in the range 8..15 for this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
567 |
version of the library. Larger values of this parameter result in better |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
568 |
compression at the expense of memory usage. The default value is 15 if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
569 |
deflateInit is used instead. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
570 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
571 |
windowBits can also be -8..-15 for raw deflate. In this case, -windowBits |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
572 |
determines the window size. deflate() will then generate raw deflate data |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
573 |
with no zlib header or trailer, and will not compute an adler32 check value. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
574 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
575 |
windowBits can also be greater than 15 for optional gzip encoding. Add |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
576 |
16 to windowBits to write a simple gzip header and trailer around the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
577 |
compressed data instead of a zlib wrapper. The gzip header will have no |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
578 |
file name, no extra data, no comment, no modification time (set to zero), no |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
579 |
header crc, and the operating system will be set to 255 (unknown). If a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
580 |
gzip stream is being written, strm->adler is a crc32 instead of an adler32. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
581 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
582 |
The memLevel parameter specifies how much memory should be allocated |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
583 |
for the internal compression state. memLevel=1 uses minimum memory but is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
584 |
slow and reduces compression ratio; memLevel=9 uses maximum memory for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
585 |
optimal speed. The default value is 8. See zconf.h for total memory usage |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
586 |
as a function of windowBits and memLevel. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
587 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
588 |
The strategy parameter is used to tune the compression algorithm. Use the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
589 |
value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
590 |
filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
591 |
string match), or Z_RLE to limit match distances to one (run-length |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
592 |
encoding). Filtered data consists mostly of small values with a somewhat |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
593 |
random distribution. In this case, the compression algorithm is tuned to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
594 |
compress them better. The effect of Z_FILTERED is to force more Huffman |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
595 |
coding and less string matching; it is somewhat intermediate between |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
596 |
Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
597 |
fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
598 |
strategy parameter only affects the compression ratio but not the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
599 |
correctness of the compressed output even if it is not set appropriately. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
600 |
Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
601 |
decoder for special applications. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
602 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
603 |
deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
604 |
memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
605 |
method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
606 |
incompatible with the version assumed by the caller (ZLIB_VERSION). msg is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
607 |
set to null if there is no error message. deflateInit2 does not perform any |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
608 |
compression: this will be done by deflate(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
609 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
610 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
611 |
ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
612 |
const Bytef *dictionary, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
613 |
uInt dictLength)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
614 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
615 |
Initializes the compression dictionary from the given byte sequence |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
616 |
without producing any compressed output. When using the zlib format, this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
617 |
function must be called immediately after deflateInit, deflateInit2 or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
618 |
deflateReset, and before any call of deflate. When doing raw deflate, this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
619 |
function must be called either before any call of deflate, or immediately |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
620 |
after the completion of a deflate block, i.e. after all input has been |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
621 |
consumed and all output has been delivered when using any of the flush |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
622 |
options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
623 |
compressor and decompressor must use exactly the same dictionary (see |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
624 |
inflateSetDictionary). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
625 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
626 |
The dictionary should consist of strings (byte sequences) that are likely |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
627 |
to be encountered later in the data to be compressed, with the most commonly |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
628 |
used strings preferably put towards the end of the dictionary. Using a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
629 |
dictionary is most useful when the data to be compressed is short and can be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
630 |
predicted with good accuracy; the data can then be compressed better than |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
631 |
with the default empty dictionary. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
632 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
633 |
Depending on the size of the compression data structures selected by |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
634 |
deflateInit or deflateInit2, a part of the dictionary may in effect be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
635 |
discarded, for example if the dictionary is larger than the window size |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
636 |
provided in deflateInit or deflateInit2. Thus the strings most likely to be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
637 |
useful should be put at the end of the dictionary, not at the front. In |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
638 |
addition, the current implementation of deflate will use at most the window |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
639 |
size minus 262 bytes of the provided dictionary. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
640 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
641 |
Upon return of this function, strm->adler is set to the adler32 value |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
642 |
of the dictionary; the decompressor may later use this value to determine |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
643 |
which dictionary has been used by the compressor. (The adler32 value |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
644 |
applies to the whole dictionary even if only a subset of the dictionary is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
645 |
actually used by the compressor.) If a raw deflate was requested, then the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
646 |
adler32 value is not computed and strm->adler is not set. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
647 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
648 |
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
649 |
parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
650 |
inconsistent (for example if deflate has already been called for this stream |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
651 |
or if not at a block boundary for raw deflate). deflateSetDictionary does |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
652 |
not perform any compression: this will be done by deflate(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
653 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
654 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
655 |
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
656 |
z_streamp source)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
657 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
658 |
Sets the destination stream as a complete copy of the source stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
659 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
660 |
This function can be useful when several compression strategies will be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
661 |
tried, for example when there are several ways of pre-processing the input |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
662 |
data with a filter. The streams that will be discarded should then be freed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
663 |
by calling deflateEnd. Note that deflateCopy duplicates the internal |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
664 |
compression state which can be quite large, so this strategy is slow and can |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
665 |
consume lots of memory. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
666 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
667 |
deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
668 |
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
669 |
(such as zalloc being Z_NULL). msg is left unchanged in both source and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
670 |
destination. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
671 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
672 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
673 |
ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
674 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
675 |
This function is equivalent to deflateEnd followed by deflateInit, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
676 |
but does not free and reallocate all the internal compression state. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
677 |
stream will keep the same compression level and any other attributes that |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
678 |
may have been set by deflateInit2. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
679 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
680 |
deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
681 |
stream state was inconsistent (such as zalloc or state being Z_NULL). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
682 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
683 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
684 |
ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
685 |
int level, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
686 |
int strategy)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
687 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
688 |
Dynamically update the compression level and compression strategy. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
689 |
interpretation of level and strategy is as in deflateInit2. This can be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
690 |
used to switch between compression and straight copy of the input data, or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
691 |
to switch to a different kind of input data requiring a different strategy. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
692 |
If the compression level is changed, the input available so far is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
693 |
compressed with the old level (and may be flushed); the new level will take |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
694 |
effect only at the next call of deflate(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
695 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
696 |
Before the call of deflateParams, the stream state must be set as for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
697 |
a call of deflate(), since the currently available input may have to be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
698 |
compressed and flushed. In particular, strm->avail_out must be non-zero. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
699 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
700 |
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
701 |
stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
702 |
strm->avail_out was zero. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
703 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
704 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
705 |
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
706 |
int good_length, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
707 |
int max_lazy, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
708 |
int nice_length, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
709 |
int max_chain)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
710 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
711 |
Fine tune deflate's internal compression parameters. This should only be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
712 |
used by someone who understands the algorithm used by zlib's deflate for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
713 |
searching for the best matching string, and even then only by the most |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
714 |
fanatic optimizer trying to squeeze out the last compressed bit for their |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
715 |
specific input data. Read the deflate.c source code for the meaning of the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
716 |
max_lazy, good_length, nice_length, and max_chain parameters. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
717 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
718 |
deflateTune() can be called after deflateInit() or deflateInit2(), and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
719 |
returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
720 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
721 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
722 |
ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
723 |
uLong sourceLen)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
724 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
725 |
deflateBound() returns an upper bound on the compressed size after |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
726 |
deflation of sourceLen bytes. It must be called after deflateInit() or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
727 |
deflateInit2(), and after deflateSetHeader(), if used. This would be used |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
728 |
to allocate an output buffer for deflation in a single pass, and so would be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
729 |
called before deflate(). If that first deflate() call is provided the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
730 |
sourceLen input bytes, an output buffer allocated to the size returned by |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
731 |
deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
732 |
to return Z_STREAM_END. Note that it is possible for the compressed size to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
733 |
be larger than the value returned by deflateBound() if flush options other |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
734 |
than Z_FINISH or Z_NO_FLUSH are used. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
735 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
736 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
737 |
ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
738 |
unsigned *pending, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
739 |
int *bits)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
740 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
741 |
deflatePending() returns the number of bytes and bits of output that have |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
742 |
been generated, but not yet provided in the available output. The bytes not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
743 |
provided would be due to the available output space having being consumed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
744 |
The number of bits of output not provided are between 0 and 7, where they |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
745 |
await more bits to join them in order to fill out a full byte. If pending |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
746 |
or bits are Z_NULL, then those values are not set. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
747 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
748 |
deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
749 |
stream state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
750 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
751 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
752 |
ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
753 |
int bits, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
754 |
int value)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
755 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
756 |
deflatePrime() inserts bits in the deflate output stream. The intent |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
757 |
is that this function is used to start off the deflate output with the bits |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
758 |
leftover from a previous deflate stream when appending to it. As such, this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
759 |
function can only be used for raw deflate, and must be used before the first |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
760 |
deflate() call after a deflateInit2() or deflateReset(). bits must be less |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
761 |
than or equal to 16, and that many of the least significant bits of value |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
762 |
will be inserted in the output. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
763 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
764 |
deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
765 |
room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
766 |
source stream state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
767 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
768 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
769 |
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
770 |
gz_headerp head)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
771 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
772 |
deflateSetHeader() provides gzip header information for when a gzip |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
773 |
stream is requested by deflateInit2(). deflateSetHeader() may be called |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
774 |
after deflateInit2() or deflateReset() and before the first call of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
775 |
deflate(). The text, time, os, extra field, name, and comment information |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
776 |
in the provided gz_header structure are written to the gzip header (xflag is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
777 |
ignored -- the extra flags are set according to the compression level). The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
778 |
caller must assure that, if not Z_NULL, name and comment are terminated with |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
779 |
a zero byte, and that if extra is not Z_NULL, that extra_len bytes are |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
780 |
available there. If hcrc is true, a gzip header crc is included. Note that |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
781 |
the current versions of the command-line version of gzip (up through version |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
782 |
1.3.x) do not support header crc's, and will report that it is a "multi-part |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
783 |
gzip file" and give up. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
784 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
785 |
If deflateSetHeader is not used, the default gzip header has text false, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
786 |
the time set to zero, and os set to 255, with no extra, name, or comment |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
787 |
fields. The gzip header is returned to the default state by deflateReset(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
788 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
789 |
deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
790 |
stream state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
791 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
792 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
793 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
794 |
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
795 |
int windowBits)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
796 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
797 |
This is another version of inflateInit with an extra parameter. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
798 |
fields next_in, avail_in, zalloc, zfree and opaque must be initialized |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
799 |
before by the caller. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
800 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
801 |
The windowBits parameter is the base two logarithm of the maximum window |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
802 |
size (the size of the history buffer). It should be in the range 8..15 for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
803 |
this version of the library. The default value is 15 if inflateInit is used |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
804 |
instead. windowBits must be greater than or equal to the windowBits value |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
805 |
provided to deflateInit2() while compressing, or it must be equal to 15 if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
806 |
deflateInit2() was not used. If a compressed stream with a larger window |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
807 |
size is given as input, inflate() will return with the error code |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
808 |
Z_DATA_ERROR instead of trying to allocate a larger window. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
809 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
810 |
windowBits can also be zero to request that inflate use the window size in |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
811 |
the zlib header of the compressed stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
812 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
813 |
windowBits can also be -8..-15 for raw inflate. In this case, -windowBits |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
814 |
determines the window size. inflate() will then process raw deflate data, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
815 |
not looking for a zlib or gzip header, not generating a check value, and not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
816 |
looking for any check values for comparison at the end of the stream. This |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
817 |
is for use with other formats that use the deflate compressed data format |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
818 |
such as zip. Those formats provide their own check values. If a custom |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
819 |
format is developed using the raw deflate format for compressed data, it is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
820 |
recommended that a check value such as an adler32 or a crc32 be applied to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
821 |
the uncompressed data as is done in the zlib, gzip, and zip formats. For |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
822 |
most applications, the zlib format should be used as is. Note that comments |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
823 |
above on the use in deflateInit2() applies to the magnitude of windowBits. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
824 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
825 |
windowBits can also be greater than 15 for optional gzip decoding. Add |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
826 |
32 to windowBits to enable zlib and gzip decoding with automatic header |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
827 |
detection, or add 16 to decode only the gzip format (the zlib format will |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
828 |
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
829 |
crc32 instead of an adler32. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
830 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
831 |
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
832 |
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
833 |
version assumed by the caller, or Z_STREAM_ERROR if the parameters are |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
834 |
invalid, such as a null pointer to the structure. msg is set to null if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
835 |
there is no error message. inflateInit2 does not perform any decompression |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
836 |
apart from possibly reading the zlib header if present: actual decompression |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
837 |
will be done by inflate(). (So next_in and avail_in may be modified, but |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
838 |
next_out and avail_out are unused and unchanged.) The current implementation |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
839 |
of inflateInit2() does not process any header information -- that is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
840 |
deferred until inflate() is called. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
841 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
842 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
843 |
ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
844 |
const Bytef *dictionary, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
845 |
uInt dictLength)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
846 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
847 |
Initializes the decompression dictionary from the given uncompressed byte |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
848 |
sequence. This function must be called immediately after a call of inflate, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
849 |
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
850 |
can be determined from the adler32 value returned by that call of inflate. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
851 |
The compressor and decompressor must use exactly the same dictionary (see |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
852 |
deflateSetDictionary). For raw inflate, this function can be called at any |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
853 |
time to set the dictionary. If the provided dictionary is smaller than the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
854 |
window and there is already data in the window, then the provided dictionary |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
855 |
will amend what's there. The application must insure that the dictionary |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
856 |
that was used for compression is provided. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
857 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
858 |
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
859 |
parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
860 |
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
861 |
expected one (incorrect adler32 value). inflateSetDictionary does not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
862 |
perform any decompression: this will be done by subsequent calls of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
863 |
inflate(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
864 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
865 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
866 |
ZEXTERN int ZEXPORT inflateGetDictionary OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
867 |
Bytef *dictionary, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
868 |
uInt *dictLength)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
869 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
870 |
Returns the sliding dictionary being maintained by inflate. dictLength is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
871 |
set to the number of bytes in the dictionary, and that many bytes are copied |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
872 |
to dictionary. dictionary must have enough space, where 32768 bytes is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
873 |
always enough. If inflateGetDictionary() is called with dictionary equal to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
874 |
Z_NULL, then only the dictionary length is returned, and nothing is copied. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
875 |
Similary, if dictLength is Z_NULL, then it is not set. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
876 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
877 |
inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
878 |
stream state is inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
879 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
880 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
881 |
ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
882 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
883 |
Skips invalid compressed data until a possible full flush point (see above |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
884 |
for the description of deflate with Z_FULL_FLUSH) can be found, or until all |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
885 |
available input is skipped. No output is provided. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
886 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
887 |
inflateSync searches for a 00 00 FF FF pattern in the compressed data. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
888 |
All full flush points have this pattern, but not all occurrences of this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
889 |
pattern are full flush points. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
890 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
891 |
inflateSync returns Z_OK if a possible full flush point has been found, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
892 |
Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
893 |
has been found, or Z_STREAM_ERROR if the stream structure was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
894 |
In the success case, the application may save the current current value of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
895 |
total_in which indicates where valid compressed data was found. In the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
896 |
error case, the application may repeatedly call inflateSync, providing more |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
897 |
input each time, until success or end of the input data. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
898 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
899 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
900 |
ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
901 |
z_streamp source)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
902 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
903 |
Sets the destination stream as a complete copy of the source stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
904 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
905 |
This function can be useful when randomly accessing a large stream. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
906 |
first pass through the stream can periodically record the inflate state, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
907 |
allowing restarting inflate at those points when randomly accessing the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
908 |
stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
909 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
910 |
inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
911 |
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
912 |
(such as zalloc being Z_NULL). msg is left unchanged in both source and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
913 |
destination. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
914 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
915 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
916 |
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
917 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
918 |
This function is equivalent to inflateEnd followed by inflateInit, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
919 |
but does not free and reallocate all the internal decompression state. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
920 |
stream will keep attributes that may have been set by inflateInit2. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
921 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
922 |
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
923 |
stream state was inconsistent (such as zalloc or state being Z_NULL). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
924 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
925 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
926 |
ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
927 |
int windowBits)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
928 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
929 |
This function is the same as inflateReset, but it also permits changing |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
930 |
the wrap and window size requests. The windowBits parameter is interpreted |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
931 |
the same as it is for inflateInit2. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
932 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
933 |
inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
934 |
stream state was inconsistent (such as zalloc or state being Z_NULL), or if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
935 |
the windowBits parameter is invalid. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
936 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
937 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
938 |
ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
939 |
int bits, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
940 |
int value)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
941 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
942 |
This function inserts bits in the inflate input stream. The intent is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
943 |
that this function is used to start inflating at a bit position in the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
944 |
middle of a byte. The provided bits will be used before any bytes are used |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
945 |
from next_in. This function should only be used with raw inflate, and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
946 |
should be used before the first inflate() call after inflateInit2() or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
947 |
inflateReset(). bits must be less than or equal to 16, and that many of the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
948 |
least significant bits of value will be inserted in the input. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
949 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
950 |
If bits is negative, then the input stream bit buffer is emptied. Then |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
951 |
inflatePrime() can be called again to put bits in the buffer. This is used |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
952 |
to clear out bits leftover after feeding inflate a block description prior |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
953 |
to feeding inflate codes. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
954 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
955 |
inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
956 |
stream state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
957 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
958 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
959 |
ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
960 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
961 |
This function returns two values, one in the lower 16 bits of the return |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
962 |
value, and the other in the remaining upper bits, obtained by shifting the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
963 |
return value down 16 bits. If the upper value is -1 and the lower value is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
964 |
zero, then inflate() is currently decoding information outside of a block. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
965 |
If the upper value is -1 and the lower value is non-zero, then inflate is in |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
966 |
the middle of a stored block, with the lower value equaling the number of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
967 |
bytes from the input remaining to copy. If the upper value is not -1, then |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
968 |
it is the number of bits back from the current bit position in the input of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
969 |
the code (literal or length/distance pair) currently being processed. In |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
970 |
that case the lower value is the number of bytes already emitted for that |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
971 |
code. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
972 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
973 |
A code is being processed if inflate is waiting for more input to complete |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
974 |
decoding of the code, or if it has completed decoding but is waiting for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
975 |
more output space to write the literal or match data. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
976 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
977 |
inflateMark() is used to mark locations in the input data for random |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
978 |
access, which may be at bit positions, and to note those cases where the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
979 |
output of a code may span boundaries of random access blocks. The current |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
980 |
location in the input stream can be determined from avail_in and data_type |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
981 |
as noted in the description for the Z_BLOCK flush parameter for inflate. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
982 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
983 |
inflateMark returns the value noted above or -1 << 16 if the provided |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
984 |
source stream state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
985 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
986 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
987 |
ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
988 |
gz_headerp head)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
989 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
990 |
inflateGetHeader() requests that gzip header information be stored in the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
991 |
provided gz_header structure. inflateGetHeader() may be called after |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
992 |
inflateInit2() or inflateReset(), and before the first call of inflate(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
993 |
As inflate() processes the gzip stream, head->done is zero until the header |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
994 |
is completed, at which time head->done is set to one. If a zlib stream is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
995 |
being decoded, then head->done is set to -1 to indicate that there will be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
996 |
no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
997 |
used to force inflate() to return immediately after header processing is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
998 |
complete and before any actual data is decompressed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
999 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1000 |
The text, time, xflags, and os fields are filled in with the gzip header |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1001 |
contents. hcrc is set to true if there is a header CRC. (The header CRC |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1002 |
was valid if done is set to one.) If extra is not Z_NULL, then extra_max |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1003 |
contains the maximum number of bytes to write to extra. Once done is true, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1004 |
extra_len contains the actual extra field length, and extra contains the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1005 |
extra field, or that field truncated if extra_max is less than extra_len. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1006 |
If name is not Z_NULL, then up to name_max characters are written there, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1007 |
terminated with a zero unless the length is greater than name_max. If |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1008 |
comment is not Z_NULL, then up to comm_max characters are written there, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1009 |
terminated with a zero unless the length is greater than comm_max. When any |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1010 |
of extra, name, or comment are not Z_NULL and the respective field is not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1011 |
present in the header, then that field is set to Z_NULL to signal its |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1012 |
absence. This allows the use of deflateSetHeader() with the returned |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1013 |
structure to duplicate the header. However if those fields are set to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1014 |
allocated memory, then the application will need to save those pointers |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1015 |
elsewhere so that they can be eventually freed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1016 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1017 |
If inflateGetHeader is not used, then the header information is simply |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1018 |
discarded. The header is always checked for validity, including the header |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1019 |
CRC if present. inflateReset() will reset the process to discard the header |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1020 |
information. The application would need to call inflateGetHeader() again to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1021 |
retrieve the header from the next gzip stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1022 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1023 |
inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1024 |
stream state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1025 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1026 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1027 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1028 |
ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1029 |
unsigned char FAR *window)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1030 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1031 |
Initialize the internal stream state for decompression using inflateBack() |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1032 |
calls. The fields zalloc, zfree and opaque in strm must be initialized |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1033 |
before the call. If zalloc and zfree are Z_NULL, then the default library- |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1034 |
derived memory allocation routines are used. windowBits is the base two |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1035 |
logarithm of the window size, in the range 8..15. window is a caller |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1036 |
supplied buffer of that size. Except for special applications where it is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1037 |
assured that deflate was used with small window sizes, windowBits must be 15 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1038 |
and a 32K byte window must be supplied to be able to decompress general |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1039 |
deflate streams. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1040 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1041 |
See inflateBack() for the usage of these routines. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1042 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1043 |
inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1044 |
the parameters are invalid, Z_MEM_ERROR if the internal state could not be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1045 |
allocated, or Z_VERSION_ERROR if the version of the library does not match |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1046 |
the version of the header file. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1047 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1048 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1049 |
typedef unsigned (*in_func) OF((void FAR *, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1050 |
z_const unsigned char FAR * FAR *)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1051 |
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1052 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1053 |
ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1054 |
in_func in, void FAR *in_desc, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1055 |
out_func out, void FAR *out_desc)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1056 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1057 |
inflateBack() does a raw inflate with a single call using a call-back |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1058 |
interface for input and output. This is potentially more efficient than |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1059 |
inflate() for file i/o applications, in that it avoids copying between the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1060 |
output and the sliding window by simply making the window itself the output |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1061 |
buffer. inflate() can be faster on modern CPUs when used with large |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1062 |
buffers. inflateBack() trusts the application to not change the output |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1063 |
buffer passed by the output function, at least until inflateBack() returns. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1064 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1065 |
inflateBackInit() must be called first to allocate the internal state |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1066 |
and to initialize the state with the user-provided window buffer. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1067 |
inflateBack() may then be used multiple times to inflate a complete, raw |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1068 |
deflate stream with each call. inflateBackEnd() is then called to free the |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1069 |
allocated state. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1070 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1071 |
A raw deflate stream is one with no zlib or gzip header or trailer. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1072 |
This routine would normally be used in a utility that reads zip or gzip |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1073 |
files and writes out uncompressed files. The utility would decode the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1074 |
header and process the trailer on its own, hence this routine expects only |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1075 |
the raw deflate stream to decompress. This is different from the normal |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1076 |
behavior of inflate(), which expects either a zlib or gzip header and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1077 |
trailer around the deflate stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1078 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1079 |
inflateBack() uses two subroutines supplied by the caller that are then |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1080 |
called by inflateBack() for input and output. inflateBack() calls those |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1081 |
routines until it reads a complete deflate stream and writes out all of the |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1082 |
uncompressed data, or until it encounters an error. The function's |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1083 |
parameters and return types are defined above in the in_func and out_func |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1084 |
typedefs. inflateBack() will call in(in_desc, &buf) which should return the |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1085 |
number of bytes of provided input, and a pointer to that input in buf. If |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1086 |
there is no input available, in() must return zero--buf is ignored in that |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1087 |
case--and inflateBack() will return a buffer error. inflateBack() will call |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1088 |
out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out() |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1089 |
should return zero on success, or non-zero on failure. If out() returns |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1090 |
non-zero, inflateBack() will return with an error. Neither in() nor out() |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1091 |
are permitted to change the contents of the window provided to |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1092 |
inflateBackInit(), which is also the buffer that out() uses to write from. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1093 |
The length written by out() will be at most the window size. Any non-zero |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1094 |
amount of input may be provided by in(). |
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sherman
parents:
diff
changeset
|
1095 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1096 |
For convenience, inflateBack() can be provided input on the first call by |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1097 |
setting strm->next_in and strm->avail_in. If that input is exhausted, then |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1098 |
in() will be called. Therefore strm->next_in must be initialized before |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1099 |
calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called |
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sherman
parents:
diff
changeset
|
1100 |
immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1101 |
must also be initialized, and then if strm->avail_in is not zero, input will |
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sherman
parents:
diff
changeset
|
1102 |
initially be taken from strm->next_in[0 .. strm->avail_in - 1]. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1103 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1104 |
The in_desc and out_desc parameters of inflateBack() is passed as the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1105 |
first parameter of in() and out() respectively when they are called. These |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1106 |
descriptors can be optionally used to pass any information that the caller- |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1107 |
supplied in() and out() functions need to do their job. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1108 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1109 |
On return, inflateBack() will set strm->next_in and strm->avail_in to |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1110 |
pass back any unused input that was provided by the last in() call. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1111 |
return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1112 |
if in() or out() returned an error, Z_DATA_ERROR if there was a format error |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1113 |
in the deflate stream (in which case strm->msg is set to indicate the nature |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1114 |
of the error), or Z_STREAM_ERROR if the stream was not properly initialized. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1115 |
In the case of Z_BUF_ERROR, an input or output error can be distinguished |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1116 |
using strm->next_in which will be Z_NULL only if in() returned an error. If |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1117 |
strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1118 |
non-zero. (in() will always be called before out(), so strm->next_in is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1119 |
assured to be defined if out() returns non-zero.) Note that inflateBack() |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1120 |
cannot return Z_OK. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1121 |
*/ |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1122 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1123 |
ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1124 |
/* |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1125 |
All memory allocated by inflateBackInit() is freed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1126 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1127 |
inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1128 |
state was inconsistent. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1129 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1130 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1131 |
ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1132 |
/* Return flags indicating compile-time options. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1133 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1134 |
Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1135 |
1.0: size of uInt |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1136 |
3.2: size of uLong |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1137 |
5.4: size of voidpf (pointer) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1138 |
7.6: size of z_off_t |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1139 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1140 |
Compiler, assembler, and debug options: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1141 |
8: DEBUG |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1142 |
9: ASMV or ASMINF -- use ASM code |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1143 |
10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1144 |
11: 0 (reserved) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1145 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1146 |
One-time table building (smaller code, but not thread-safe if true): |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1147 |
12: BUILDFIXED -- build static block decoding tables when needed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1148 |
13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1149 |
14,15: 0 (reserved) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1150 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1151 |
Library content (indicates missing functionality): |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1152 |
16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1153 |
deflate code when not needed) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1154 |
17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1155 |
and decode gzip streams (to avoid linking crc code) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1156 |
18-19: 0 (reserved) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1157 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1158 |
Operation variations (changes in library functionality): |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1159 |
20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1160 |
21: FASTEST -- deflate algorithm with only one, lowest compression level |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1161 |
22,23: 0 (reserved) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1162 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1163 |
The sprintf variant used by gzprintf (zero is best): |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1164 |
24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1165 |
25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure! |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1166 |
26: 0 = returns value, 1 = void -- 1 means inferred string length returned |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1167 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1168 |
Remainder: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1169 |
27-31: 0 (reserved) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1170 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1171 |
|
c019dc4104b2
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parents:
diff
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|
1172 |
#ifndef Z_SOLO |
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parents:
diff
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|
1173 |
|
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parents:
diff
changeset
|
1174 |
/* utility functions */ |
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parents:
diff
changeset
|
1175 |
|
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parents:
diff
changeset
|
1176 |
/* |
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parents:
diff
changeset
|
1177 |
The following utility functions are implemented on top of the basic |
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parents:
diff
changeset
|
1178 |
stream-oriented functions. To simplify the interface, some default options |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1179 |
are assumed (compression level and memory usage, standard memory allocation |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1180 |
functions). The source code of these utility functions can be modified if |
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parents:
diff
changeset
|
1181 |
you need special options. |
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parents:
diff
changeset
|
1182 |
*/ |
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parents:
diff
changeset
|
1183 |
|
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parents:
diff
changeset
|
1184 |
ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, |
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parents:
diff
changeset
|
1185 |
const Bytef *source, uLong sourceLen)); |
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parents:
diff
changeset
|
1186 |
/* |
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parents:
diff
changeset
|
1187 |
Compresses the source buffer into the destination buffer. sourceLen is |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1188 |
the byte length of the source buffer. Upon entry, destLen is the total size |
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parents:
diff
changeset
|
1189 |
of the destination buffer, which must be at least the value returned by |
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parents:
diff
changeset
|
1190 |
compressBound(sourceLen). Upon exit, destLen is the actual size of the |
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parents:
diff
changeset
|
1191 |
compressed buffer. |
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sherman
parents:
diff
changeset
|
1192 |
|
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parents:
diff
changeset
|
1193 |
compress returns Z_OK if success, Z_MEM_ERROR if there was not |
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parents:
diff
changeset
|
1194 |
enough memory, Z_BUF_ERROR if there was not enough room in the output |
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parents:
diff
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|
1195 |
buffer. |
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parents:
diff
changeset
|
1196 |
*/ |
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parents:
diff
changeset
|
1197 |
|
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parents:
diff
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|
1198 |
ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, |
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parents:
diff
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|
1199 |
const Bytef *source, uLong sourceLen, |
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parents:
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|
1200 |
int level)); |
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parents:
diff
changeset
|
1201 |
/* |
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parents:
diff
changeset
|
1202 |
Compresses the source buffer into the destination buffer. The level |
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sherman
parents:
diff
changeset
|
1203 |
parameter has the same meaning as in deflateInit. sourceLen is the byte |
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parents:
diff
changeset
|
1204 |
length of the source buffer. Upon entry, destLen is the total size of the |
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parents:
diff
changeset
|
1205 |
destination buffer, which must be at least the value returned by |
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parents:
diff
changeset
|
1206 |
compressBound(sourceLen). Upon exit, destLen is the actual size of the |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1207 |
compressed buffer. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1208 |
|
c019dc4104b2
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parents:
diff
changeset
|
1209 |
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough |
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parents:
diff
changeset
|
1210 |
memory, Z_BUF_ERROR if there was not enough room in the output buffer, |
c019dc4104b2
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parents:
diff
changeset
|
1211 |
Z_STREAM_ERROR if the level parameter is invalid. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1212 |
*/ |
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parents:
diff
changeset
|
1213 |
|
c019dc4104b2
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parents:
diff
changeset
|
1214 |
ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); |
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parents:
diff
changeset
|
1215 |
/* |
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parents:
diff
changeset
|
1216 |
compressBound() returns an upper bound on the compressed size after |
c019dc4104b2
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parents:
diff
changeset
|
1217 |
compress() or compress2() on sourceLen bytes. It would be used before a |
c019dc4104b2
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parents:
diff
changeset
|
1218 |
compress() or compress2() call to allocate the destination buffer. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1219 |
*/ |
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sherman
parents:
diff
changeset
|
1220 |
|
c019dc4104b2
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parents:
diff
changeset
|
1221 |
ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, |
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parents:
diff
changeset
|
1222 |
const Bytef *source, uLong sourceLen)); |
c019dc4104b2
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parents:
diff
changeset
|
1223 |
/* |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1224 |
Decompresses the source buffer into the destination buffer. sourceLen is |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1225 |
the byte length of the source buffer. Upon entry, destLen is the total size |
c019dc4104b2
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parents:
diff
changeset
|
1226 |
of the destination buffer, which must be large enough to hold the entire |
c019dc4104b2
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parents:
diff
changeset
|
1227 |
uncompressed data. (The size of the uncompressed data must have been saved |
c019dc4104b2
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parents:
diff
changeset
|
1228 |
previously by the compressor and transmitted to the decompressor by some |
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sherman
parents:
diff
changeset
|
1229 |
mechanism outside the scope of this compression library.) Upon exit, destLen |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1230 |
is the actual size of the uncompressed buffer. |
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parents:
diff
changeset
|
1231 |
|
c019dc4104b2
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parents:
diff
changeset
|
1232 |
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not |
c019dc4104b2
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parents:
diff
changeset
|
1233 |
enough memory, Z_BUF_ERROR if there was not enough room in the output |
c019dc4104b2
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parents:
diff
changeset
|
1234 |
buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1235 |
the case where there is not enough room, uncompress() will fill the output |
c019dc4104b2
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parents:
diff
changeset
|
1236 |
buffer with the uncompressed data up to that point. |
c019dc4104b2
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parents:
diff
changeset
|
1237 |
*/ |
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parents:
diff
changeset
|
1238 |
|
c019dc4104b2
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parents:
diff
changeset
|
1239 |
/* gzip file access functions */ |
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parents:
diff
changeset
|
1240 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1241 |
/* |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1242 |
This library supports reading and writing files in gzip (.gz) format with |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
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parents:
diff
changeset
|
1243 |
an interface similar to that of stdio, using the functions that start with |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1244 |
"gz". The gzip format is different from the zlib format. gzip is a gzip |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1245 |
wrapper, documented in RFC 1952, wrapped around a deflate stream. |
c019dc4104b2
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parents:
diff
changeset
|
1246 |
*/ |
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sherman
parents:
diff
changeset
|
1247 |
|
c019dc4104b2
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parents:
diff
changeset
|
1248 |
typedef struct gzFile_s *gzFile; /* semi-opaque gzip file descriptor */ |
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sherman
parents:
diff
changeset
|
1249 |
|
c019dc4104b2
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parents:
diff
changeset
|
1250 |
/* |
c019dc4104b2
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parents:
diff
changeset
|
1251 |
ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); |
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parents:
diff
changeset
|
1252 |
|
c019dc4104b2
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parents:
diff
changeset
|
1253 |
Opens a gzip (.gz) file for reading or writing. The mode parameter is as |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1254 |
in fopen ("rb" or "wb") but can also include a compression level ("wb9") or |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1255 |
a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1256 |
compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1257 |
for fixed code compression as in "wb9F". (See the description of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1258 |
deflateInit2 for more information about the strategy parameter.) 'T' will |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1259 |
request transparent writing or appending with no compression and not using |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1260 |
the gzip format. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1261 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1262 |
"a" can be used instead of "w" to request that the gzip stream that will |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1263 |
be written be appended to the file. "+" will result in an error, since |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1264 |
reading and writing to the same gzip file is not supported. The addition of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1265 |
"x" when writing will create the file exclusively, which fails if the file |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1266 |
already exists. On systems that support it, the addition of "e" when |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1267 |
reading or writing will set the flag to close the file on an execve() call. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1268 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1269 |
These functions, as well as gzip, will read and decode a sequence of gzip |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1270 |
streams in a file. The append function of gzopen() can be used to create |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1271 |
such a file. (Also see gzflush() for another way to do this.) When |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1272 |
appending, gzopen does not test whether the file begins with a gzip stream, |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1273 |
nor does it look for the end of the gzip streams to begin appending. gzopen |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1274 |
will simply append a gzip stream to the existing file. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1275 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1276 |
gzopen can be used to read a file which is not in gzip format; in this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1277 |
case gzread will directly read from the file without decompression. When |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1278 |
reading, this will be detected automatically by looking for the magic two- |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1279 |
byte gzip header. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1280 |
|
c019dc4104b2
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sherman
parents:
diff
changeset
|
1281 |
gzopen returns NULL if the file could not be opened, if there was |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1282 |
insufficient memory to allocate the gzFile state, or if an invalid mode was |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1283 |
specified (an 'r', 'w', or 'a' was not provided, or '+' was provided). |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1284 |
errno can be checked to determine if the reason gzopen failed was that the |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1285 |
file could not be opened. |
c019dc4104b2
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sherman
parents:
diff
changeset
|
1286 |
*/ |
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sherman
parents:
diff
changeset
|
1287 |
|
c019dc4104b2
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parents:
diff
changeset
|
1288 |
ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1289 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1290 |
gzdopen associates a gzFile with the file descriptor fd. File descriptors |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1291 |
are obtained from calls like open, dup, creat, pipe or fileno (if the file |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1292 |
has been previously opened with fopen). The mode parameter is as in gzopen. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1293 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1294 |
The next call of gzclose on the returned gzFile will also close the file |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1295 |
descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1296 |
fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1297 |
mode);. The duplicated descriptor should be saved to avoid a leak, since |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1298 |
gzdopen does not close fd if it fails. If you are using fileno() to get the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1299 |
file descriptor from a FILE *, then you will have to use dup() to avoid |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1300 |
double-close()ing the file descriptor. Both gzclose() and fclose() will |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1301 |
close the associated file descriptor, so they need to have different file |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1302 |
descriptors. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1303 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1304 |
gzdopen returns NULL if there was insufficient memory to allocate the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1305 |
gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1306 |
provided, or '+' was provided), or if fd is -1. The file descriptor is not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1307 |
used until the next gz* read, write, seek, or close operation, so gzdopen |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1308 |
will not detect if fd is invalid (unless fd is -1). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1309 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1310 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1311 |
ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1312 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1313 |
Set the internal buffer size used by this library's functions. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1314 |
default buffer size is 8192 bytes. This function must be called after |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1315 |
gzopen() or gzdopen(), and before any other calls that read or write the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1316 |
file. The buffer memory allocation is always deferred to the first read or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1317 |
write. Two buffers are allocated, either both of the specified size when |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1318 |
writing, or one of the specified size and the other twice that size when |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1319 |
reading. A larger buffer size of, for example, 64K or 128K bytes will |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1320 |
noticeably increase the speed of decompression (reading). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1321 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1322 |
The new buffer size also affects the maximum length for gzprintf(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1323 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1324 |
gzbuffer() returns 0 on success, or -1 on failure, such as being called |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1325 |
too late. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1326 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1327 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1328 |
ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1329 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1330 |
Dynamically update the compression level or strategy. See the description |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1331 |
of deflateInit2 for the meaning of these parameters. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1332 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1333 |
gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1334 |
opened for writing. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1335 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1336 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1337 |
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1338 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1339 |
Reads the given number of uncompressed bytes from the compressed file. If |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1340 |
the input file is not in gzip format, gzread copies the given number of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1341 |
bytes into the buffer directly from the file. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1342 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1343 |
After reaching the end of a gzip stream in the input, gzread will continue |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1344 |
to read, looking for another gzip stream. Any number of gzip streams may be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1345 |
concatenated in the input file, and will all be decompressed by gzread(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1346 |
If something other than a gzip stream is encountered after a gzip stream, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1347 |
that remaining trailing garbage is ignored (and no error is returned). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1348 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1349 |
gzread can be used to read a gzip file that is being concurrently written. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1350 |
Upon reaching the end of the input, gzread will return with the available |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1351 |
data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1352 |
gzclearerr can be used to clear the end of file indicator in order to permit |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1353 |
gzread to be tried again. Z_OK indicates that a gzip stream was completed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1354 |
on the last gzread. Z_BUF_ERROR indicates that the input file ended in the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1355 |
middle of a gzip stream. Note that gzread does not return -1 in the event |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1356 |
of an incomplete gzip stream. This error is deferred until gzclose(), which |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1357 |
will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1358 |
stream. Alternatively, gzerror can be used before gzclose to detect this |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1359 |
case. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1360 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1361 |
gzread returns the number of uncompressed bytes actually read, less than |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1362 |
len for end of file, or -1 for error. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1363 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1364 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1365 |
ZEXTERN int ZEXPORT gzwrite OF((gzFile file, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1366 |
voidpc buf, unsigned len)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1367 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1368 |
Writes the given number of uncompressed bytes into the compressed file. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1369 |
gzwrite returns the number of uncompressed bytes written or 0 in case of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1370 |
error. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1371 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1372 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1373 |
ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1374 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1375 |
Converts, formats, and writes the arguments to the compressed file under |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1376 |
control of the format string, as in fprintf. gzprintf returns the number of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1377 |
uncompressed bytes actually written, or 0 in case of error. The number of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1378 |
uncompressed bytes written is limited to 8191, or one less than the buffer |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1379 |
size given to gzbuffer(). The caller should assure that this limit is not |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1380 |
exceeded. If it is exceeded, then gzprintf() will return an error (0) with |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1381 |
nothing written. In this case, there may also be a buffer overflow with |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1382 |
unpredictable consequences, which is possible only if zlib was compiled with |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1383 |
the insecure functions sprintf() or vsprintf() because the secure snprintf() |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1384 |
or vsnprintf() functions were not available. This can be determined using |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1385 |
zlibCompileFlags(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1386 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1387 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1388 |
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1389 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1390 |
Writes the given null-terminated string to the compressed file, excluding |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1391 |
the terminating null character. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1392 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1393 |
gzputs returns the number of characters written, or -1 in case of error. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1394 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1395 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1396 |
ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1397 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1398 |
Reads bytes from the compressed file until len-1 characters are read, or a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1399 |
newline character is read and transferred to buf, or an end-of-file |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1400 |
condition is encountered. If any characters are read or if len == 1, the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1401 |
string is terminated with a null character. If no characters are read due |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1402 |
to an end-of-file or len < 1, then the buffer is left untouched. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1403 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1404 |
gzgets returns buf which is a null-terminated string, or it returns NULL |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1405 |
for end-of-file or in case of error. If there was an error, the contents at |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1406 |
buf are indeterminate. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1407 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1408 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1409 |
ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1410 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1411 |
Writes c, converted to an unsigned char, into the compressed file. gzputc |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1412 |
returns the value that was written, or -1 in case of error. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1413 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1414 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1415 |
ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1416 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1417 |
Reads one byte from the compressed file. gzgetc returns this byte or -1 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1418 |
in case of end of file or error. This is implemented as a macro for speed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1419 |
As such, it does not do all of the checking the other functions do. I.e. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1420 |
it does not check to see if file is NULL, nor whether the structure file |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1421 |
points to has been clobbered or not. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1422 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1423 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1424 |
ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1425 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1426 |
Push one character back onto the stream to be read as the first character |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1427 |
on the next read. At least one character of push-back is allowed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1428 |
gzungetc() returns the character pushed, or -1 on failure. gzungetc() will |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1429 |
fail if c is -1, and may fail if a character has been pushed but not read |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1430 |
yet. If gzungetc is used immediately after gzopen or gzdopen, at least the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1431 |
output buffer size of pushed characters is allowed. (See gzbuffer above.) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1432 |
The pushed character will be discarded if the stream is repositioned with |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1433 |
gzseek() or gzrewind(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1434 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1435 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1436 |
ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1437 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1438 |
Flushes all pending output into the compressed file. The parameter flush |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1439 |
is as in the deflate() function. The return value is the zlib error number |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1440 |
(see function gzerror below). gzflush is only permitted when writing. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1441 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1442 |
If the flush parameter is Z_FINISH, the remaining data is written and the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1443 |
gzip stream is completed in the output. If gzwrite() is called again, a new |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1444 |
gzip stream will be started in the output. gzread() is able to read such |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1445 |
concatented gzip streams. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1446 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1447 |
gzflush should be called only when strictly necessary because it will |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1448 |
degrade compression if called too often. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1449 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1450 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1451 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1452 |
ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1453 |
z_off_t offset, int whence)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1454 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1455 |
Sets the starting position for the next gzread or gzwrite on the given |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1456 |
compressed file. The offset represents a number of bytes in the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1457 |
uncompressed data stream. The whence parameter is defined as in lseek(2); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1458 |
the value SEEK_END is not supported. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1459 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1460 |
If the file is opened for reading, this function is emulated but can be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1461 |
extremely slow. If the file is opened for writing, only forward seeks are |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1462 |
supported; gzseek then compresses a sequence of zeroes up to the new |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1463 |
starting position. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1464 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1465 |
gzseek returns the resulting offset location as measured in bytes from |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1466 |
the beginning of the uncompressed stream, or -1 in case of error, in |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1467 |
particular if the file is opened for writing and the new starting position |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1468 |
would be before the current position. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1469 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1470 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1471 |
ZEXTERN int ZEXPORT gzrewind OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1472 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1473 |
Rewinds the given file. This function is supported only for reading. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1474 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1475 |
gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1476 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1477 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1478 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1479 |
ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1480 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1481 |
Returns the starting position for the next gzread or gzwrite on the given |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1482 |
compressed file. This position represents a number of bytes in the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1483 |
uncompressed data stream, and is zero when starting, even if appending or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1484 |
reading a gzip stream from the middle of a file using gzdopen(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1485 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1486 |
gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1487 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1488 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1489 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1490 |
ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1491 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1492 |
Returns the current offset in the file being read or written. This offset |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1493 |
includes the count of bytes that precede the gzip stream, for example when |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1494 |
appending or when using gzdopen() for reading. When reading, the offset |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1495 |
does not include as yet unused buffered input. This information can be used |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1496 |
for a progress indicator. On error, gzoffset() returns -1. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1497 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1498 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1499 |
ZEXTERN int ZEXPORT gzeof OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1500 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1501 |
Returns true (1) if the end-of-file indicator has been set while reading, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1502 |
false (0) otherwise. Note that the end-of-file indicator is set only if the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1503 |
read tried to go past the end of the input, but came up short. Therefore, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1504 |
just like feof(), gzeof() may return false even if there is no more data to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1505 |
read, in the event that the last read request was for the exact number of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1506 |
bytes remaining in the input file. This will happen if the input file size |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1507 |
is an exact multiple of the buffer size. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1508 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1509 |
If gzeof() returns true, then the read functions will return no more data, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1510 |
unless the end-of-file indicator is reset by gzclearerr() and the input file |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1511 |
has grown since the previous end of file was detected. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1512 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1513 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1514 |
ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1515 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1516 |
Returns true (1) if file is being copied directly while reading, or false |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1517 |
(0) if file is a gzip stream being decompressed. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1518 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1519 |
If the input file is empty, gzdirect() will return true, since the input |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1520 |
does not contain a gzip stream. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1521 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1522 |
If gzdirect() is used immediately after gzopen() or gzdopen() it will |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1523 |
cause buffers to be allocated to allow reading the file to determine if it |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1524 |
is a gzip file. Therefore if gzbuffer() is used, it should be called before |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1525 |
gzdirect(). |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1526 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1527 |
When writing, gzdirect() returns true (1) if transparent writing was |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1528 |
requested ("wT" for the gzopen() mode), or false (0) otherwise. (Note: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1529 |
gzdirect() is not needed when writing. Transparent writing must be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1530 |
explicitly requested, so the application already knows the answer. When |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1531 |
linking statically, using gzdirect() will include all of the zlib code for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1532 |
gzip file reading and decompression, which may not be desired.) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1533 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1534 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1535 |
ZEXTERN int ZEXPORT gzclose OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1536 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1537 |
Flushes all pending output if necessary, closes the compressed file and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1538 |
deallocates the (de)compression state. Note that once file is closed, you |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1539 |
cannot call gzerror with file, since its structures have been deallocated. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1540 |
gzclose must not be called more than once on the same file, just as free |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1541 |
must not be called more than once on the same allocation. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1542 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1543 |
gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1544 |
file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1545 |
last read ended in the middle of a gzip stream, or Z_OK on success. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1546 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1547 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1548 |
ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1549 |
ZEXTERN int ZEXPORT gzclose_w OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1550 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1551 |
Same as gzclose(), but gzclose_r() is only for use when reading, and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1552 |
gzclose_w() is only for use when writing or appending. The advantage to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1553 |
using these instead of gzclose() is that they avoid linking in zlib |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1554 |
compression or decompression code that is not used when only reading or only |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1555 |
writing respectively. If gzclose() is used, then both compression and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1556 |
decompression code will be included the application when linking to a static |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1557 |
zlib library. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1558 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1559 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1560 |
ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1561 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1562 |
Returns the error message for the last error which occurred on the given |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1563 |
compressed file. errnum is set to zlib error number. If an error occurred |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1564 |
in the file system and not in the compression library, errnum is set to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1565 |
Z_ERRNO and the application may consult errno to get the exact error code. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1566 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1567 |
The application must not modify the returned string. Future calls to |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1568 |
this function may invalidate the previously returned string. If file is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1569 |
closed, then the string previously returned by gzerror will no longer be |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1570 |
available. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1571 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1572 |
gzerror() should be used to distinguish errors from end-of-file for those |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1573 |
functions above that do not distinguish those cases in their return values. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1574 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1575 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1576 |
ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1577 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1578 |
Clears the error and end-of-file flags for file. This is analogous to the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1579 |
clearerr() function in stdio. This is useful for continuing to read a gzip |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1580 |
file that is being written concurrently. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1581 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1582 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1583 |
#endif /* !Z_SOLO */ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1584 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1585 |
/* checksum functions */ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1586 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1587 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1588 |
These functions are not related to compression but are exported |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1589 |
anyway because they might be useful in applications using the compression |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1590 |
library. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1591 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1592 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1593 |
ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1594 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1595 |
Update a running Adler-32 checksum with the bytes buf[0..len-1] and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1596 |
return the updated checksum. If buf is Z_NULL, this function returns the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1597 |
required initial value for the checksum. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1598 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1599 |
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1600 |
much faster. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1601 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1602 |
Usage example: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1603 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1604 |
uLong adler = adler32(0L, Z_NULL, 0); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1605 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1606 |
while (read_buffer(buffer, length) != EOF) { |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1607 |
adler = adler32(adler, buffer, length); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1608 |
} |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1609 |
if (adler != original_adler) error(); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1610 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1611 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1612 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1613 |
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1614 |
z_off_t len2)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1615 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1616 |
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1617 |
and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1618 |
each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1619 |
seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1620 |
that the z_off_t type (like off_t) is a signed integer. If len2 is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1621 |
negative, the result has no meaning or utility. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1622 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1623 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1624 |
ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1625 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1626 |
Update a running CRC-32 with the bytes buf[0..len-1] and return the |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1627 |
updated CRC-32. If buf is Z_NULL, this function returns the required |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1628 |
initial value for the crc. Pre- and post-conditioning (one's complement) is |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1629 |
performed within this function so it shouldn't be done by the application. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1630 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1631 |
Usage example: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1632 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1633 |
uLong crc = crc32(0L, Z_NULL, 0); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1634 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1635 |
while (read_buffer(buffer, length) != EOF) { |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1636 |
crc = crc32(crc, buffer, length); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1637 |
} |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1638 |
if (crc != original_crc) error(); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1639 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1640 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1641 |
/* |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1642 |
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1643 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1644 |
Combine two CRC-32 check values into one. For two sequences of bytes, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1645 |
seq1 and seq2 with lengths len1 and len2, CRC-32 check values were |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1646 |
calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1647 |
check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1648 |
len2. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1649 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1650 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1651 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1652 |
/* various hacks, don't look :) */ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1653 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1654 |
/* deflateInit and inflateInit are macros to allow checking the zlib version |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1655 |
* and the compiler's view of z_stream: |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1656 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1657 |
ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1658 |
const char *version, int stream_size)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1659 |
ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1660 |
const char *version, int stream_size)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1661 |
ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1662 |
int windowBits, int memLevel, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1663 |
int strategy, const char *version, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1664 |
int stream_size)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1665 |
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1666 |
const char *version, int stream_size)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1667 |
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1668 |
unsigned char FAR *window, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1669 |
const char *version, |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1670 |
int stream_size)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1671 |
#define deflateInit(strm, level) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1672 |
deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1673 |
#define inflateInit(strm) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1674 |
inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1675 |
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1676 |
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1677 |
(strategy), ZLIB_VERSION, (int)sizeof(z_stream)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1678 |
#define inflateInit2(strm, windowBits) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1679 |
inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1680 |
(int)sizeof(z_stream)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1681 |
#define inflateBackInit(strm, windowBits, window) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1682 |
inflateBackInit_((strm), (windowBits), (window), \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1683 |
ZLIB_VERSION, (int)sizeof(z_stream)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1684 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1685 |
#ifndef Z_SOLO |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1686 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1687 |
/* gzgetc() macro and its supporting function and exposed data structure. Note |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1688 |
* that the real internal state is much larger than the exposed structure. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1689 |
* This abbreviated structure exposes just enough for the gzgetc() macro. The |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1690 |
* user should not mess with these exposed elements, since their names or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1691 |
* behavior could change in the future, perhaps even capriciously. They can |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1692 |
* only be used by the gzgetc() macro. You have been warned. |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1693 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1694 |
struct gzFile_s { |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1695 |
unsigned have; |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1696 |
unsigned char *next; |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1697 |
z_off64_t pos; |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1698 |
}; |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1699 |
ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1700 |
#ifdef Z_PREFIX_SET |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1701 |
# undef z_gzgetc |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1702 |
# define z_gzgetc(g) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1703 |
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1704 |
#else |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1705 |
# define gzgetc(g) \ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1706 |
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g)) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1707 |
#endif |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1708 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1709 |
/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1710 |
* change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1711 |
* both are true, the application gets the *64 functions, and the regular |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1712 |
* functions are changed to 64 bits) -- in case these are set on systems |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1713 |
* without large file support, _LFS64_LARGEFILE must also be true |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1714 |
*/ |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1715 |
#ifdef Z_LARGE64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1716 |
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1717 |
ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1718 |
ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1719 |
ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1720 |
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1721 |
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1722 |
#endif |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1723 |
|
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1724 |
#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64) |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1725 |
# ifdef Z_PREFIX_SET |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1726 |
# define z_gzopen z_gzopen64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1727 |
# define z_gzseek z_gzseek64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1728 |
# define z_gztell z_gztell64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1729 |
# define z_gzoffset z_gzoffset64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1730 |
# define z_adler32_combine z_adler32_combine64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1731 |
# define z_crc32_combine z_crc32_combine64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1732 |
# else |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1733 |
# define gzopen gzopen64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1734 |
# define gzseek gzseek64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1735 |
# define gztell gztell64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1736 |
# define gzoffset gzoffset64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1737 |
# define adler32_combine adler32_combine64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1738 |
# define crc32_combine crc32_combine64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1739 |
# endif |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1740 |
# ifndef Z_LARGE64 |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1741 |
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1742 |
ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1743 |
ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1744 |
ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1745 |
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1746 |
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1747 |
# endif |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1748 |
#else |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1749 |
ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1750 |
ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1751 |
ZEXTERN z_off_t ZEXPORT gztell OF((gzFile)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1752 |
ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile)); |
c019dc4104b2
8044725: Bug in zlib 1.2.5 prevents inflation of some gzipped files
sherman
parents:
diff
changeset
|
1753 |
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); |
c019dc4104b2
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1754 |
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); |
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|
1755 |
#endif |
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|
1756 |
|
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|
1757 |
#else /* Z_SOLO */ |
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|
1758 |
|
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|
1759 |
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); |
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|
1760 |
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); |
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|
1761 |
|
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|
1762 |
#endif /* !Z_SOLO */ |
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|
1763 |
|
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|
1764 |
/* hack for buggy compilers */ |
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|
1765 |
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL) |
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|
1766 |
struct internal_state {int dummy;}; |
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|
1767 |
#endif |
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|
1768 |
|
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|
1769 |
/* undocumented functions */ |
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|
1770 |
ZEXTERN const char * ZEXPORT zError OF((int)); |
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|
1771 |
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); |
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|
1772 |
ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void)); |
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|
1773 |
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); |
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|
1774 |
ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp)); |
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|
1775 |
ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp)); |
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|
1776 |
#if defined(_WIN32) && !defined(Z_SOLO) |
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|
1777 |
ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path, |
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|
1778 |
const char *mode)); |
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|
1779 |
#endif |
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|
1780 |
#if defined(STDC) || defined(Z_HAVE_STDARG_H) |
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|
1781 |
# ifndef Z_SOLO |
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|
1782 |
ZEXTERN int ZEXPORTVA gzvprintf Z_ARG((gzFile file, |
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|
1783 |
const char *format, |
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|
1784 |
va_list va)); |
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|
1785 |
# endif |
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changeset
|
1786 |
#endif |
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diff
changeset
|
1787 |
|
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|
1788 |
#ifdef __cplusplus |
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|
1789 |
} |
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|
1790 |
#endif |
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changeset
|
1791 |
|
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|
1792 |
#endif /* ZLIB_H */ |