misc/quazip/zlib.h
author koda
Sat, 01 Oct 2011 03:06:51 +0200
changeset 6076 e1b4771f6472
parent 5784 0692f628d166
permissions -rw-r--r--
fix a couple of 'potential leaks'
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/* zlib.h -- interface of the 'zlib' general purpose compression library
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  version 1.2.3, July 18th, 2005
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  Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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  Jean-loup Gailly        Mark Adler
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  jloup@gzip.org          madler@alumni.caltech.edu
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  The data format used by the zlib library is described by RFCs (Request for
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  Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
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  (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
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*/
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#ifndef ZLIB_H
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#define ZLIB_H
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#include "zconf.h"
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#include "qconfig.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ZLIB_VERSION "1.2.3"
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#define ZLIB_VERNUM 0x1230
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#if defined(QT_VISIBILITY_AVAILABLE)
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# define Q_ZEXPORT __attribute__((visibility("default")))
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#else
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# ifdef QT_MAKEDLL
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# define Q_ZEXPORT __declspec(dllexport)
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# else
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# define Q_ZEXPORT ZEXPORT
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# endif
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#endif
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/*
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     The 'zlib' compression library provides in-memory compression and
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  decompression functions, including integrity checks of the uncompressed
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  data.  This version of the library supports only one compression method
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  (deflation) but other algorithms will be added later and will have the same
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  stream interface.
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     Compression can be done in a single step if the buffers are large
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  enough (for example if an input file is mmap'ed), or can be done by
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  repeated calls of the compression function.  In the latter case, the
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  application must provide more input and/or consume the output
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  (providing more output space) before each call.
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     The compressed data format used by default by the in-memory functions is
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  the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
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  around a deflate stream, which is itself documented in RFC 1951.
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     The library also supports reading and writing files in gzip (.gz) format
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  with an interface similar to that of stdio using the functions that start
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  with "gz".  The gzip format is different from the zlib format.  gzip is a
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  gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
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     This library can optionally read and write gzip streams in memory as well.
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     The zlib format was designed to be compact and fast for use in memory
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  and on communications channels.  The gzip format was designed for single-
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  file compression on file systems, has a larger header than zlib to maintain
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  directory information, and uses a different, slower check method than zlib.
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     The library does not install any signal handler. The decoder checks
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  the consistency of the compressed data, so the library should never
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  crash even in case of corrupted input.
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*/
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typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
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typedef void   (*free_func)  OF((voidpf opaque, voidpf address));
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struct internal_state;
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typedef struct z_stream_s {
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    Bytef    *next_in;  /* next input byte */
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    uInt     avail_in;  /* number of bytes available at next_in */
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    uLong    total_in;  /* total nb of input bytes read so far */
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    Bytef    *next_out; /* next output byte should be put there */
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    uInt     avail_out; /* remaining free space at next_out */
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    uLong    total_out; /* total nb of bytes output so far */
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    char     *msg;      /* last error message, NULL if no error */
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    struct internal_state FAR *state; /* not visible by applications */
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    alloc_func zalloc;  /* used to allocate the internal state */
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    free_func  zfree;   /* used to free the internal state */
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    voidpf     opaque;  /* private data object passed to zalloc and zfree */
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    int     data_type;  /* best guess about the data type: 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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typedef z_stream FAR *z_streamp;
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/*
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     gzip header information passed to and from zlib routines.  See RFC 1952
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  for more details on the meanings of these fields.
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*/
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typedef struct gz_header_s {
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    int     text;       /* true if compressed data believed to be text */
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    uLong   time;       /* modification time */
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    int     xflags;     /* extra flags (not used when writing a gzip file) */
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    int     os;         /* operating system */
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    Bytef   *extra;     /* pointer to extra field or Z_NULL if none */
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    uInt    extra_len;  /* extra field length (valid if extra != Z_NULL) */
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    uInt    extra_max;  /* space at extra (only when reading header) */
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    Bytef   *name;      /* pointer to zero-terminated file name or Z_NULL */
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    uInt    name_max;   /* space at name (only when reading header) */
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    Bytef   *comment;   /* pointer to zero-terminated comment or Z_NULL */
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    uInt    comm_max;   /* space at comment (only when reading header) */
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    int     hcrc;       /* true if there was or will be a header crc */
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    int     done;       /* true when done reading gzip header (not used
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                           when writing a gzip file) */
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} gz_header;
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typedef gz_header FAR *gz_headerp;
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/*
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   The application must update next_in and avail_in when avail_in has
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   dropped to zero. It must update next_out and avail_out when avail_out
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   has dropped to zero. The application must initialize zalloc, zfree and
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   opaque before calling the init function. All other fields are set by the
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   compression library and must not be updated by the application.
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   The opaque value provided by the application will be passed as the first
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   parameter for calls of zalloc and zfree. This can be useful for custom
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   memory management. The compression library attaches no meaning to the
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   opaque value.
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   zalloc must return Z_NULL if there is not enough memory for the object.
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   If zlib is used in a multi-threaded application, zalloc and zfree must be
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   thread safe.
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   On 16-bit systems, the functions zalloc and zfree must be able to allocate
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   exactly 65536 bytes, but will not be required to allocate more than this
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   if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
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   pointers returned by zalloc for objects of exactly 65536 bytes *must*
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   have their offset normalized to zero. The default allocation function
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   provided by this library ensures this (see zutil.c). To reduce memory
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   requirements and avoid any allocation of 64K objects, at the expense of
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   compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
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   The fields total_in and total_out can be used for statistics or
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   progress reports. After compression, total_in holds the total size of
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   the uncompressed data and may be saved for use in the decompressor
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   (particularly if the decompressor wants to decompress everything in
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   a single step).
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*/
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                        /* constants */
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#define Z_NO_FLUSH      0
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#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
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#define Z_SYNC_FLUSH    2
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#define Z_FULL_FLUSH    3
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#define Z_FINISH        4
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#define Z_BLOCK         5
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/* Allowed flush values; see deflate() and inflate() below for details */
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#define Z_OK            0
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#define Z_STREAM_END    1
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#define Z_NEED_DICT     2
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#define Z_ERRNO        (-1)
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#define Z_STREAM_ERROR (-2)
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#define Z_DATA_ERROR   (-3)
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#define Z_MEM_ERROR    (-4)
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#define Z_BUF_ERROR    (-5)
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#define Z_VERSION_ERROR (-6)
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/* Return codes for the compression/decompression functions. Negative
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 * values are errors, positive values are used for special but normal events.
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 */
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#define Z_NO_COMPRESSION         0
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#define Z_BEST_SPEED             1
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#define Z_BEST_COMPRESSION       9
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#define Z_DEFAULT_COMPRESSION  (-1)
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/* compression levels */
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#define Z_FILTERED            1
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#define Z_HUFFMAN_ONLY        2
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#define Z_RLE                 3
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#define Z_FIXED               4
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#define Z_DEFAULT_STRATEGY    0
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/* compression strategy; see deflateInit2() below for details */
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#define Z_BINARY   0
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#define Z_TEXT     1
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#define Z_ASCII    Z_TEXT   /* for compatibility with 1.2.2 and earlier */
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#define Z_UNKNOWN  2
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/* Possible values of the data_type field (though see inflate()) */
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#define Z_DEFLATED   8
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/* The deflate compression method (the only one supported in this version) */
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#define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
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#define zlib_version zlibVersion()
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/* for compatibility with versions < 1.0.2 */
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                        /* basic functions */
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ZEXTERN Q_ZEXPORT const char * zlibVersion OF((void));
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/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
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   If the first character differs, the library code actually used is
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   not compatible with the zlib.h header file used by the application.
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   This check is automatically made by deflateInit and inflateInit.
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 */
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/*
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ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
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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.
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   If zalloc and zfree are set to Z_NULL, deflateInit updates them to
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   use default allocation functions.
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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
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   all (the input data is simply copied a block at a time).
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   Z_DEFAULT_COMPRESSION requests a default compromise between speed and
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   compression (currently equivalent to level 6).
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     deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
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   enough memory, Z_STREAM_ERROR if level is not a valid compression level,
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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).
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   msg is set to null if there is no error message.  deflateInit does not
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   perform any compression: this will be done by deflate().
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*/
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ZEXTERN int Q_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 some
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  output latency (reading input without producing any output) except when
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  forced to flush.
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    The detailed semantics are as follows. deflate performs one or both of the
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  following actions:
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  - Compress more input starting at next_in and update next_in and avail_in
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    accordingly. If not all input can be processed (because there is not
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    enough room in the output buffer), next_in 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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  - Provide more output starting at next_out and update next_out and avail_out
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    accordingly. This action is forced if the parameter flush is non zero.
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    Forcing flush frequently degrades the compression ratio, so this parameter
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    should be set only when necessary (in interactive applications).
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    Some output may be provided even if flush is not set.
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  Before the call of deflate(), the application should ensure that at least
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  one of the actions is possible, by providing more input and/or consuming
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  more output, and updating avail_in or avail_out accordingly; avail_out
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  should never be zero before the call. The application can consume the
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  compressed output when it wants, for example when the output buffer is full
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  (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
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  and with zero avail_out, it must be called again after making room in the
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  output buffer because there might be more output pending.
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    Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
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  decide how much data to accumualte before producing output, in order to
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  maximize compression.
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    If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
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  flushed to the output buffer and the output is aligned on a byte boundary, so
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  that the decompressor can get all input data available so far. (In particular
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  avail_in is zero after the call if enough output space has been provided
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  before the call.)  Flushing may degrade compression for some compression
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  algorithms and so it should be used only when necessary.
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    If flush is set to Z_FULL_FLUSH, all output is flushed as with
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  Z_SYNC_FLUSH, and the compression state is reset so that decompression can
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  restart from this point if previous compressed data has been damaged or if
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  random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
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  compression.
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    If deflate returns with avail_out == 0, this function must be called again
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  with the same value of the flush parameter and more output space (updated
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  avail_out), until the flush is complete (deflate returns with non-zero
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  avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
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  avail_out is greater than six to avoid repeated flush markers due to
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  avail_out == 0 on return.
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    If the parameter flush is set to Z_FINISH, pending input is processed,
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  pending output is flushed and deflate returns with Z_STREAM_END if there
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  was enough output space; if deflate returns with Z_OK, this function must be
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  called again with Z_FINISH and more output space (updated avail_out) but no
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  more input data, until it returns with Z_STREAM_END or an error. After
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  deflate has returned Z_STREAM_END, the only possible operations on the
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  stream are deflateReset or deflateEnd.
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    Z_FINISH can be used immediately after deflateInit if all the compression
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  is to be done in a single step. In this case, avail_out must be at least
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  the value returned by deflateBound (see below). If deflate does not return
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  Z_STREAM_END, then it must be called again as described above.
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    deflate() sets strm->adler to the adler32 checksum of all input read
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  so far (that is, total_in bytes).
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    deflate() may update strm->data_type if it can make a good guess about
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  the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
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  binary. This field is only for information purposes and does not affect
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  the compression algorithm in any manner.
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    deflate() returns Z_OK if some progress has been made (more input
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  processed or more output produced), Z_STREAM_END if all input has been
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  consumed and all output has been produced (only when flush is set to
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  Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
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  if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
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  (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
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  fatal, and deflate() can be called again with more input and more output
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  space to continue compressing.
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*/
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ZEXTERN int Q_ZEXPORT deflateEnd OF((z_streamp strm));
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/*
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     All dynamically allocated data structures for this stream are freed.
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   This function discards any unprocessed input and does not flush any
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   pending output.
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     deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
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   stream state was inconsistent, Z_DATA_ERROR if the stream was freed
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   prematurely (some input or output was discarded). In the error case,
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   msg may be set but then points to a static string (which must not be
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   deallocated).
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*/
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/*
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ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
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     Initializes the internal stream state for decompression. The fields
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   next_in, avail_in, zalloc, zfree and opaque must be initialized before by
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   the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
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   value depends on the compression method), inflateInit determines the
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   compression method from the zlib header and allocates all data structures
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   accordingly; otherwise the allocation will be deferred to the first call of
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   inflate.  If zalloc and zfree are set to Z_NULL, inflateInit updates them to
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   use default allocation functions.
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     inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
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   memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
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   version assumed by the caller.  msg is set to null if there is no error
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   message. inflateInit does not perform any decompression apart from reading
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   the zlib header if present: this will be done by inflate().  (So next_in and
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   avail_in may be modified, but next_out and avail_out are unchanged.)
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*/
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ZEXTERN int Q_ZEXPORT inflate OF((z_streamp strm, int flush));
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/*
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    inflate decompresses as much data as possible, and stops when the input
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  buffer becomes empty or the output buffer becomes full. It may introduce
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  some output latency (reading input without producing any output) except when
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  forced to flush.
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   380
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  The detailed semantics are as follows. inflate performs one or both of the
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   382
  following actions:
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   383
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  - Decompress more input starting at next_in and update next_in and avail_in
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   385
    accordingly. If not all input can be processed (because there is not
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   386
    enough room in the output buffer), next_in is updated and processing
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   387
    will resume at this point for the next call of inflate().
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   388
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   389
  - Provide more output starting at next_out and update next_out and avail_out
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   390
    accordingly.  inflate() provides as much output as possible, until there
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   391
    is no more input data or no more space in the output buffer (see below
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   392
    about the flush parameter).
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   393
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   394
  Before the call of inflate(), the application should ensure that at least
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   395
  one of the actions is possible, by providing more input and/or consuming
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   396
  more output, and updating the next_* and avail_* values accordingly.
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   397
  The application can consume the uncompressed output when it wants, for
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   398
  example when the output buffer is full (avail_out == 0), or after each
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diff changeset
   399
  call of inflate(). If inflate returns Z_OK and with zero avail_out, it
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   400
  must be called again after making room in the output buffer because there
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   401
  might be more output pending.
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   402
0692f628d166 Add zlib headers (library itself is included to Qt)
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   403
    The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
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   404
  Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   405
  output as possible to the output buffer. Z_BLOCK requests that inflate() stop
0692f628d166 Add zlib headers (library itself is included to Qt)
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   406
  if and when it gets to the next deflate block boundary. When decoding the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   407
  zlib or gzip format, this will cause inflate() to return immediately after
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   408
  the header and before the first block. When doing a raw inflate, inflate()
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   409
  will go ahead and process the first block, and will return when it gets to
0692f628d166 Add zlib headers (library itself is included to Qt)
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   410
  the end of that block, or when it runs out of data.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   411
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   412
    The Z_BLOCK option assists in appending to or combining deflate streams.
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   413
  Also to assist in this, on return inflate() will set strm->data_type to the
0692f628d166 Add zlib headers (library itself is included to Qt)
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   414
  number of unused bits in the last byte taken from strm->next_in, plus 64
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   415
  if inflate() is currently decoding the last block in the deflate stream,
0692f628d166 Add zlib headers (library itself is included to Qt)
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   416
  plus 128 if inflate() returned immediately after decoding an end-of-block
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diff changeset
   417
  code or decoding the complete header up to just before the first byte of the
0692f628d166 Add zlib headers (library itself is included to Qt)
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   418
  deflate stream. The end-of-block will not be indicated until all of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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   419
  uncompressed data from that block has been written to strm->next_out.  The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   420
  number of unused bits may in general be greater than seven, except when
0692f628d166 Add zlib headers (library itself is included to Qt)
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   421
  bit 7 of data_type is set, in which case the number of unused bits will be
0692f628d166 Add zlib headers (library itself is included to Qt)
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   422
  less than eight.
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   423
0692f628d166 Add zlib headers (library itself is included to Qt)
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   424
    inflate() should normally be called until it returns Z_STREAM_END or an
0692f628d166 Add zlib headers (library itself is included to Qt)
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   425
  error. However if all decompression is to be performed in a single step
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   426
  (a single call of inflate), the parameter flush should be set to
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   427
  Z_FINISH. In this case all pending input is processed and all pending
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   428
  output is flushed; avail_out must be large enough to hold all the
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   429
  uncompressed data. (The size of the uncompressed data may have been saved
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   430
  by the compressor for this purpose.) The next operation on this stream must
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   431
  be inflateEnd to deallocate the decompression state. The use of Z_FINISH
0692f628d166 Add zlib headers (library itself is included to Qt)
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   432
  is never required, but can be used to inform inflate that a faster approach
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   433
  may be used for the single inflate() call.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   434
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   435
     In this implementation, inflate() always flushes as much output as
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   436
  possible to the output buffer, and always uses the faster approach on the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   437
  first call. So the only effect of the flush parameter in this implementation
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   438
  is on the return value of inflate(), as noted below, or when it returns early
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   439
  because Z_BLOCK is used.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   440
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   441
     If a preset dictionary is needed after this call (see inflateSetDictionary
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   442
  below), inflate sets strm->adler to the adler32 checksum of the dictionary
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   443
  chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   444
  strm->adler to the adler32 checksum of all output produced so far (that is,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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   445
  total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   446
  below. At the end of the stream, inflate() checks that its computed adler32
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   447
  checksum is equal to that saved by the compressor and returns Z_STREAM_END
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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   448
  only if the checksum is correct.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   449
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   450
    inflate() will decompress and check either zlib-wrapped or gzip-wrapped
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   451
  deflate data.  The header type is detected automatically.  Any information
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   452
  contained in the gzip header is not retained, so applications that need that
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   453
  information should instead use raw inflate, see inflateInit2() below, or
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   454
  inflateBack() and perform their own processing of the gzip header and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   455
  trailer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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diff changeset
   456
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
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   457
    inflate() returns Z_OK if some progress has been made (more input processed
0692f628d166 Add zlib headers (library itself is included to Qt)
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diff changeset
   458
  or more output produced), Z_STREAM_END if the end of the compressed data has
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   459
  been reached and all uncompressed output has been produced, Z_NEED_DICT if a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   460
  preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   461
  corrupted (input stream not conforming to the zlib format or incorrect check
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   462
  value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   463
  if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   464
  Z_BUF_ERROR if no progress is possible or if there was not enough room in the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   465
  output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   466
  inflate() can be called again with more input and more output space to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   467
  continue decompressing. If Z_DATA_ERROR is returned, the application may then
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   468
  call inflateSync() to look for a good compression block if a partial recovery
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   469
  of the data is desired.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   470
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   471
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   472
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   473
ZEXTERN int Q_ZEXPORT inflateEnd OF((z_streamp strm));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   474
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   475
     All dynamically allocated data structures for this stream are freed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   476
   This function discards any unprocessed input and does not flush any
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   477
   pending output.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   478
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   479
     inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   480
   was inconsistent. In the error case, msg may be set but then points to a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   481
   static string (which must not be deallocated).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   482
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   483
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   484
                        /* Advanced functions */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   485
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   486
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   487
    The following functions are needed only in some special applications.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   488
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   489
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   490
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   491
ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   492
                                     int  level,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   493
                                     int  method,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   494
                                     int  windowBits,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   495
                                     int  memLevel,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   496
                                     int  strategy));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   497
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   498
     This is another version of deflateInit with more compression options. The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   499
   fields next_in, zalloc, zfree and opaque must be initialized before by
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   500
   the caller.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   501
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   502
     The method parameter is the compression method. It must be Z_DEFLATED in
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   503
   this version of the library.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   504
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   505
     The windowBits parameter is the base two logarithm of the window size
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   506
   (the size of the history buffer). It should be in the range 8..15 for this
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   507
   version of the library. Larger values of this parameter result in better
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   508
   compression at the expense of memory usage. The default value is 15 if
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   509
   deflateInit is used instead.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   510
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   511
     windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   512
   determines the window size. deflate() will then generate raw deflate data
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   513
   with no zlib header or trailer, and will not compute an adler32 check value.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   514
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   515
     windowBits can also be greater than 15 for optional gzip encoding. Add
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   516
   16 to windowBits to write a simple gzip header and trailer around the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   517
   compressed data instead of a zlib wrapper. The gzip header will have no
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   518
   file name, no extra data, no comment, no modification time (set to zero),
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   519
   no header crc, and the operating system will be set to 255 (unknown).  If a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   520
   gzip stream is being written, strm->adler is a crc32 instead of an adler32.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   521
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   522
     The memLevel parameter specifies how much memory should be allocated
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   523
   for the internal compression state. memLevel=1 uses minimum memory but
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   524
   is slow and reduces compression ratio; memLevel=9 uses maximum memory
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   525
   for optimal speed. The default value is 8. See zconf.h for total memory
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   526
   usage as a function of windowBits and memLevel.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   527
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   528
     The strategy parameter is used to tune the compression algorithm. Use the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   529
   value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   530
   filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   531
   string match), or Z_RLE to limit match distances to one (run-length
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   532
   encoding). Filtered data consists mostly of small values with a somewhat
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   533
   random distribution. In this case, the compression algorithm is tuned to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   534
   compress them better. The effect of Z_FILTERED is to force more Huffman
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   535
   coding and less string matching; it is somewhat intermediate between
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   536
   Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   537
   Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   538
   parameter only affects the compression ratio but not the correctness of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   539
   compressed output even if it is not set appropriately.  Z_FIXED prevents the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   540
   use of dynamic Huffman codes, allowing for a simpler decoder for special
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   541
   applications.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   542
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   543
      deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   544
   memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   545
   method). msg is set to null if there is no error message.  deflateInit2 does
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   546
   not perform any compression: this will be done by deflate().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   547
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   548
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   549
ZEXTERN int Q_ZEXPORT deflateSetDictionary OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   550
                                             const Bytef *dictionary,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   551
                                             uInt  dictLength));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   552
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   553
     Initializes the compression dictionary from the given byte sequence
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   554
   without producing any compressed output. This function must be called
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   555
   immediately after deflateInit, deflateInit2 or deflateReset, before any
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   556
   call of deflate. The compressor and decompressor must use exactly the same
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   557
   dictionary (see inflateSetDictionary).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   558
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   559
     The dictionary should consist of strings (byte sequences) that are likely
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   560
   to be encountered later in the data to be compressed, with the most commonly
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   561
   used strings preferably put towards the end of the dictionary. Using a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   562
   dictionary is most useful when the data to be compressed is short and can be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   563
   predicted with good accuracy; the data can then be compressed better than
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   564
   with the default empty dictionary.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   565
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   566
     Depending on the size of the compression data structures selected by
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   567
   deflateInit or deflateInit2, a part of the dictionary may in effect be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   568
   discarded, for example if the dictionary is larger than the window size in
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   569
   deflate or deflate2. Thus the strings most likely to be useful should be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   570
   put at the end of the dictionary, not at the front. In addition, the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   571
   current implementation of deflate will use at most the window size minus
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   572
   262 bytes of the provided dictionary.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   573
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   574
     Upon return of this function, strm->adler is set to the adler32 value
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   575
   of the dictionary; the decompressor may later use this value to determine
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   576
   which dictionary has been used by the compressor. (The adler32 value
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   577
   applies to the whole dictionary even if only a subset of the dictionary is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   578
   actually used by the compressor.) If a raw deflate was requested, then the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   579
   adler32 value is not computed and strm->adler is not set.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   580
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   581
     deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   582
   parameter is invalid (such as NULL dictionary) or the stream state is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   583
   inconsistent (for example if deflate has already been called for this stream
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   584
   or if the compression method is bsort). deflateSetDictionary does not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   585
   perform any compression: this will be done by deflate().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   586
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   587
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   588
ZEXTERN int Q_ZEXPORT deflateCopy OF((z_streamp dest,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   589
                                    z_streamp source));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   590
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   591
     Sets the destination stream as a complete copy of the source stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   592
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   593
     This function can be useful when several compression strategies will be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   594
   tried, for example when there are several ways of pre-processing the input
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   595
   data with a filter. The streams that will be discarded should then be freed
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   596
   by calling deflateEnd.  Note that deflateCopy duplicates the internal
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   597
   compression state which can be quite large, so this strategy is slow and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   598
   can consume lots of memory.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   599
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   600
     deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   601
   enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   602
   (such as zalloc being NULL). msg is left unchanged in both source and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   603
   destination.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   604
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   605
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   606
ZEXTERN int Q_ZEXPORT deflateReset OF((z_streamp strm));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   607
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   608
     This function is equivalent to deflateEnd followed by deflateInit,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   609
   but does not free and reallocate all the internal compression state.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   610
   The stream will keep the same compression level and any other attributes
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   611
   that may have been set by deflateInit2.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   612
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   613
      deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   614
   stream state was inconsistent (such as zalloc or state being NULL).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   615
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   616
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   617
ZEXTERN int Q_ZEXPORT deflateParams OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   618
                                      int level,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   619
                                      int strategy));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   620
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   621
     Dynamically update the compression level and compression strategy.  The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   622
   interpretation of level and strategy is as in deflateInit2.  This can be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   623
   used to switch between compression and straight copy of the input data, or
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   624
   to switch to a different kind of input data requiring a different
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   625
   strategy. If the compression level is changed, the input available so far
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   626
   is compressed with the old level (and may be flushed); the new level will
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   627
   take effect only at the next call of deflate().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   628
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   629
     Before the call of deflateParams, the stream state must be set as for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   630
   a call of deflate(), since the currently available input may have to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   631
   be compressed and flushed. In particular, strm->avail_out must be non-zero.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   632
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   633
     deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   634
   stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   635
   if strm->avail_out was zero.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   636
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   637
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   638
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   639
                                    int good_length,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   640
                                    int max_lazy,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   641
                                    int nice_length,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   642
                                    int max_chain));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   643
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   644
     Fine tune deflate's internal compression parameters.  This should only be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   645
   used by someone who understands the algorithm used by zlib's deflate for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   646
   searching for the best matching string, and even then only by the most
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   647
   fanatic optimizer trying to squeeze out the last compressed bit for their
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   648
   specific input data.  Read the deflate.c source code for the meaning of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   649
   max_lazy, good_length, nice_length, and max_chain parameters.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   650
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   651
     deflateTune() can be called after deflateInit() or deflateInit2(), and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   652
   returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   653
 */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   654
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   655
ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   656
                                       uLong sourceLen));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   657
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   658
     deflateBound() returns an upper bound on the compressed size after
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   659
   deflation of sourceLen bytes.  It must be called after deflateInit()
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   660
   or deflateInit2().  This would be used to allocate an output buffer
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   661
   for deflation in a single pass, and so would be called before deflate().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   662
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   663
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   664
ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   665
                                     int bits,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   666
                                     int value));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   667
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   668
     deflatePrime() inserts bits in the deflate output stream.  The intent
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   669
  is that this function is used to start off the deflate output with the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   670
  bits leftover from a previous deflate stream when appending to it.  As such,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   671
  this function can only be used for raw deflate, and must be used before the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   672
  first deflate() call after a deflateInit2() or deflateReset().  bits must be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   673
  less than or equal to 16, and that many of the least significant bits of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   674
  value will be inserted in the output.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   675
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   676
      deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   677
   stream state was inconsistent.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   678
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   679
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   680
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   681
                                         gz_headerp head));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   682
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   683
      deflateSetHeader() provides gzip header information for when a gzip
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   684
   stream is requested by deflateInit2().  deflateSetHeader() may be called
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   685
   after deflateInit2() or deflateReset() and before the first call of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   686
   deflate().  The text, time, os, extra field, name, and comment information
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   687
   in the provided gz_header structure are written to the gzip header (xflag is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   688
   ignored -- the extra flags are set according to the compression level).  The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   689
   caller must assure that, if not Z_NULL, name and comment are terminated with
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   690
   a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   691
   available there.  If hcrc is true, a gzip header crc is included.  Note that
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   692
   the current versions of the command-line version of gzip (up through version
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   693
   1.3.x) do not support header crc's, and will report that it is a "multi-part
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   694
   gzip file" and give up.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   695
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   696
      If deflateSetHeader is not used, the default gzip header has text false,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   697
   the time set to zero, and os set to 255, with no extra, name, or comment
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   698
   fields.  The gzip header is returned to the default state by deflateReset().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   699
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   700
      deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   701
   stream state was inconsistent.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   702
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   703
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   704
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   705
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   706
                                     int  windowBits));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   707
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   708
     This is another version of inflateInit with an extra parameter. The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   709
   fields next_in, avail_in, zalloc, zfree and opaque must be initialized
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   710
   before by the caller.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   711
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   712
     The windowBits parameter is the base two logarithm of the maximum window
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   713
   size (the size of the history buffer).  It should be in the range 8..15 for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   714
   this version of the library. The default value is 15 if inflateInit is used
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   715
   instead. windowBits must be greater than or equal to the windowBits value
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   716
   provided to deflateInit2() while compressing, or it must be equal to 15 if
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   717
   deflateInit2() was not used. If a compressed stream with a larger window
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   718
   size is given as input, inflate() will return with the error code
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   719
   Z_DATA_ERROR instead of trying to allocate a larger window.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   720
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   721
     windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   722
   determines the window size. inflate() will then process raw deflate data,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   723
   not looking for a zlib or gzip header, not generating a check value, and not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   724
   looking for any check values for comparison at the end of the stream. This
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   725
   is for use with other formats that use the deflate compressed data format
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   726
   such as zip.  Those formats provide their own check values. If a custom
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   727
   format is developed using the raw deflate format for compressed data, it is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   728
   recommended that a check value such as an adler32 or a crc32 be applied to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   729
   the uncompressed data as is done in the zlib, gzip, and zip formats.  For
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   730
   most applications, the zlib format should be used as is. Note that comments
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   731
   above on the use in deflateInit2() applies to the magnitude of windowBits.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   732
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   733
     windowBits can also be greater than 15 for optional gzip decoding. Add
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   734
   32 to windowBits to enable zlib and gzip decoding with automatic header
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   735
   detection, or add 16 to decode only the gzip format (the zlib format will
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   736
   return a Z_DATA_ERROR).  If a gzip stream is being decoded, strm->adler is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   737
   a crc32 instead of an adler32.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   738
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   739
     inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   740
   memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   741
   is set to null if there is no error message.  inflateInit2 does not perform
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   742
   any decompression apart from reading the zlib header if present: this will
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   743
   be done by inflate(). (So next_in and avail_in may be modified, but next_out
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   744
   and avail_out are unchanged.)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   745
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   746
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   747
ZEXTERN int Q_ZEXPORT inflateSetDictionary OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   748
                                             const Bytef *dictionary,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   749
                                             uInt  dictLength));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   750
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   751
     Initializes the decompression dictionary from the given uncompressed byte
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   752
   sequence. This function must be called immediately after a call of inflate,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   753
   if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   754
   can be determined from the adler32 value returned by that call of inflate.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   755
   The compressor and decompressor must use exactly the same dictionary (see
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   756
   deflateSetDictionary).  For raw inflate, this function can be called
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   757
   immediately after inflateInit2() or inflateReset() and before any call of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   758
   inflate() to set the dictionary.  The application must insure that the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   759
   dictionary that was used for compression is provided.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   760
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   761
     inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   762
   parameter is invalid (such as NULL dictionary) or the stream state is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   763
   inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   764
   expected one (incorrect adler32 value). inflateSetDictionary does not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   765
   perform any decompression: this will be done by subsequent calls of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   766
   inflate().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   767
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   768
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   769
ZEXTERN int Q_ZEXPORT inflateSync OF((z_streamp strm));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   770
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   771
    Skips invalid compressed data until a full flush point (see above the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   772
  description of deflate with Z_FULL_FLUSH) can be found, or until all
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   773
  available input is skipped. No output is provided.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   774
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   775
    inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   776
  if no more input was provided, Z_DATA_ERROR if no flush point has been found,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   777
  or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   778
  case, the application may save the current current value of total_in which
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   779
  indicates where valid compressed data was found. In the error case, the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   780
  application may repeatedly call inflateSync, providing more input each time,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   781
  until success or end of the input data.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   782
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   783
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   784
ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   785
                                    z_streamp source));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   786
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   787
     Sets the destination stream as a complete copy of the source stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   788
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   789
     This function can be useful when randomly accessing a large stream.  The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   790
   first pass through the stream can periodically record the inflate state,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   791
   allowing restarting inflate at those points when randomly accessing the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   792
   stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   793
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   794
     inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   795
   enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   796
   (such as zalloc being NULL). msg is left unchanged in both source and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   797
   destination.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   798
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   799
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   800
ZEXTERN int Q_ZEXPORT inflateReset OF((z_streamp strm));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   801
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   802
     This function is equivalent to inflateEnd followed by inflateInit,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   803
   but does not free and reallocate all the internal decompression state.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   804
   The stream will keep attributes that may have been set by inflateInit2.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   805
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   806
      inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   807
   stream state was inconsistent (such as zalloc or state being NULL).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   808
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   809
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   810
ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   811
                                     int bits,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   812
                                     int value));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   813
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   814
     This function inserts bits in the inflate input stream.  The intent is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   815
  that this function is used to start inflating at a bit position in the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   816
  middle of a byte.  The provided bits will be used before any bytes are used
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   817
  from next_in.  This function should only be used with raw inflate, and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   818
  should be used before the first inflate() call after inflateInit2() or
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   819
  inflateReset().  bits must be less than or equal to 16, and that many of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   820
  least significant bits of value will be inserted in the input.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   821
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   822
      inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   823
   stream state was inconsistent.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   824
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   825
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   826
ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   827
                                         gz_headerp head));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   828
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   829
      inflateGetHeader() requests that gzip header information be stored in the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   830
   provided gz_header structure.  inflateGetHeader() may be called after
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   831
   inflateInit2() or inflateReset(), and before the first call of inflate().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   832
   As inflate() processes the gzip stream, head->done is zero until the header
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   833
   is completed, at which time head->done is set to one.  If a zlib stream is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   834
   being decoded, then head->done is set to -1 to indicate that there will be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   835
   no gzip header information forthcoming.  Note that Z_BLOCK can be used to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   836
   force inflate() to return immediately after header processing is complete
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   837
   and before any actual data is decompressed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   838
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   839
      The text, time, xflags, and os fields are filled in with the gzip header
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   840
   contents.  hcrc is set to true if there is a header CRC.  (The header CRC
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   841
   was valid if done is set to one.)  If extra is not Z_NULL, then extra_max
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   842
   contains the maximum number of bytes to write to extra.  Once done is true,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   843
   extra_len contains the actual extra field length, and extra contains the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   844
   extra field, or that field truncated if extra_max is less than extra_len.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   845
   If name is not Z_NULL, then up to name_max characters are written there,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   846
   terminated with a zero unless the length is greater than name_max.  If
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   847
   comment is not Z_NULL, then up to comm_max characters are written there,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   848
   terminated with a zero unless the length is greater than comm_max.  When
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   849
   any of extra, name, or comment are not Z_NULL and the respective field is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   850
   not present in the header, then that field is set to Z_NULL to signal its
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   851
   absence.  This allows the use of deflateSetHeader() with the returned
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   852
   structure to duplicate the header.  However if those fields are set to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   853
   allocated memory, then the application will need to save those pointers
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   854
   elsewhere so that they can be eventually freed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   855
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   856
      If inflateGetHeader is not used, then the header information is simply
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   857
   discarded.  The header is always checked for validity, including the header
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   858
   CRC if present.  inflateReset() will reset the process to discard the header
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   859
   information.  The application would need to call inflateGetHeader() again to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   860
   retrieve the header from the next gzip stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   861
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   862
      inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   863
   stream state was inconsistent.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   864
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   865
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   866
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   867
ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   868
                                        unsigned char FAR *window));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   869
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   870
     Initialize the internal stream state for decompression using inflateBack()
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   871
   calls.  The fields zalloc, zfree and opaque in strm must be initialized
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   872
   before the call.  If zalloc and zfree are Z_NULL, then the default library-
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   873
   derived memory allocation routines are used.  windowBits is the base two
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   874
   logarithm of the window size, in the range 8..15.  window is a caller
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   875
   supplied buffer of that size.  Except for special applications where it is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   876
   assured that deflate was used with small window sizes, windowBits must be 15
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   877
   and a 32K byte window must be supplied to be able to decompress general
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   878
   deflate streams.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   879
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   880
     See inflateBack() for the usage of these routines.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   881
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   882
     inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   883
   the paramaters are invalid, Z_MEM_ERROR if the internal state could not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   884
   be allocated, or Z_VERSION_ERROR if the version of the library does not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   885
   match the version of the header file.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   886
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   887
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   888
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   889
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   890
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   891
ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   892
                                    in_func in, void FAR *in_desc,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   893
                                    out_func out, void FAR *out_desc));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   894
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   895
     inflateBack() does a raw inflate with a single call using a call-back
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   896
   interface for input and output.  This is more efficient than inflate() for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   897
   file i/o applications in that it avoids copying between the output and the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   898
   sliding window by simply making the window itself the output buffer.  This
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   899
   function trusts the application to not change the output buffer passed by
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   900
   the output function, at least until inflateBack() returns.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   901
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   902
     inflateBackInit() must be called first to allocate the internal state
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   903
   and to initialize the state with the user-provided window buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   904
   inflateBack() may then be used multiple times to inflate a complete, raw
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   905
   deflate stream with each call.  inflateBackEnd() is then called to free
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   906
   the allocated state.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   907
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   908
     A raw deflate stream is one with no zlib or gzip header or trailer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   909
   This routine would normally be used in a utility that reads zip or gzip
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   910
   files and writes out uncompressed files.  The utility would decode the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   911
   header and process the trailer on its own, hence this routine expects
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   912
   only the raw deflate stream to decompress.  This is different from the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   913
   normal behavior of inflate(), which expects either a zlib or gzip header and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   914
   trailer around the deflate stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   915
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   916
     inflateBack() uses two subroutines supplied by the caller that are then
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   917
   called by inflateBack() for input and output.  inflateBack() calls those
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   918
   routines until it reads a complete deflate stream and writes out all of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   919
   uncompressed data, or until it encounters an error.  The function's
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   920
   parameters and return types are defined above in the in_func and out_func
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   921
   typedefs.  inflateBack() will call in(in_desc, &buf) which should return the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   922
   number of bytes of provided input, and a pointer to that input in buf.  If
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   923
   there is no input available, in() must return zero--buf is ignored in that
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   924
   case--and inflateBack() will return a buffer error.  inflateBack() will call
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   925
   out(out_desc, buf, len) to write the uncompressed data buf[0..len-1].  out()
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   926
   should return zero on success, or non-zero on failure.  If out() returns
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   927
   non-zero, inflateBack() will return with an error.  Neither in() nor out()
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   928
   are permitted to change the contents of the window provided to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   929
   inflateBackInit(), which is also the buffer that out() uses to write from.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   930
   The length written by out() will be at most the window size.  Any non-zero
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   931
   amount of input may be provided by in().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   932
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   933
     For convenience, inflateBack() can be provided input on the first call by
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   934
   setting strm->next_in and strm->avail_in.  If that input is exhausted, then
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   935
   in() will be called.  Therefore strm->next_in must be initialized before
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   936
   calling inflateBack().  If strm->next_in is Z_NULL, then in() will be called
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   937
   immediately for input.  If strm->next_in is not Z_NULL, then strm->avail_in
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   938
   must also be initialized, and then if strm->avail_in is not zero, input will
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   939
   initially be taken from strm->next_in[0 .. strm->avail_in - 1].
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   940
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   941
     The in_desc and out_desc parameters of inflateBack() is passed as the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   942
   first parameter of in() and out() respectively when they are called.  These
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   943
   descriptors can be optionally used to pass any information that the caller-
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   944
   supplied in() and out() functions need to do their job.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   945
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   946
     On return, inflateBack() will set strm->next_in and strm->avail_in to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   947
   pass back any unused input that was provided by the last in() call.  The
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   948
   return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   949
   if in() or out() returned an error, Z_DATA_ERROR if there was a format
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   950
   error in the deflate stream (in which case strm->msg is set to indicate the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   951
   nature of the error), or Z_STREAM_ERROR if the stream was not properly
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   952
   initialized.  In the case of Z_BUF_ERROR, an input or output error can be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   953
   distinguished using strm->next_in which will be Z_NULL only if in() returned
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   954
   an error.  If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   955
   out() returning non-zero.  (in() will always be called before out(), so
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   956
   strm->next_in is assured to be defined if out() returns non-zero.)  Note
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   957
   that inflateBack() cannot return Z_OK.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   958
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   959
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   960
ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   961
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   962
     All memory allocated by inflateBackInit() is freed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   963
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   964
     inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   965
   state was inconsistent.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   966
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   967
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   968
ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   969
/* Return flags indicating compile-time options.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   970
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   971
    Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   972
     1.0: size of uInt
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   973
     3.2: size of uLong
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   974
     5.4: size of voidpf (pointer)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   975
     7.6: size of z_off_t
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   976
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   977
    Compiler, assembler, and debug options:
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   978
     8: DEBUG
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   979
     9: ASMV or ASMINF -- use ASM code
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   980
     10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   981
     11: 0 (reserved)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   982
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   983
    One-time table building (smaller code, but not thread-safe if true):
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   984
     12: BUILDFIXED -- build static block decoding tables when needed
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   985
     13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   986
     14,15: 0 (reserved)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   987
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   988
    Library content (indicates missing functionality):
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   989
     16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   990
                          deflate code when not needed)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   991
     17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   992
                    and decode gzip streams (to avoid linking crc code)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   993
     18-19: 0 (reserved)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   994
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   995
    Operation variations (changes in library functionality):
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   996
     20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   997
     21: FASTEST -- deflate algorithm with only one, lowest compression level
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   998
     22,23: 0 (reserved)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
   999
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1000
    The sprintf variant used by gzprintf (zero is best):
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1001
     24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1002
     25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1003
     26: 0 = returns value, 1 = void -- 1 means inferred string length returned
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1004
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1005
    Remainder:
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1006
     27-31: 0 (reserved)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1007
 */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1008
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1009
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1010
                        /* utility functions */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1011
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1012
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1013
     The following utility functions are implemented on top of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1014
   basic stream-oriented functions. To simplify the interface, some
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1015
   default options are assumed (compression level and memory usage,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1016
   standard memory allocation functions). The source code of these
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1017
   utility functions can easily be modified if you need special options.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1018
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1019
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1020
ZEXTERN int Q_ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1021
                                 const Bytef *source, uLong sourceLen));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1022
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1023
     Compresses the source buffer into the destination buffer.  sourceLen is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1024
   the byte length of the source buffer. Upon entry, destLen is the total
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1025
   size of the destination buffer, which must be at least the value returned
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1026
   by compressBound(sourceLen). Upon exit, destLen is the actual size of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1027
   compressed buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1028
     This function can be used to compress a whole file at once if the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1029
   input file is mmap'ed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1030
     compress returns Z_OK if success, Z_MEM_ERROR if there was not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1031
   enough memory, Z_BUF_ERROR if there was not enough room in the output
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1032
   buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1033
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1034
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1035
ZEXTERN int Q_ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1036
                                  const Bytef *source, uLong sourceLen,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1037
                                  int level));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1038
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1039
     Compresses the source buffer into the destination buffer. The level
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1040
   parameter has the same meaning as in deflateInit.  sourceLen is the byte
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1041
   length of the source buffer. Upon entry, destLen is the total size of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1042
   destination buffer, which must be at least the value returned by
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1043
   compressBound(sourceLen). Upon exit, destLen is the actual size of the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1044
   compressed buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1045
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1046
     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1047
   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1048
   Z_STREAM_ERROR if the level parameter is invalid.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1049
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1050
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1051
ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1052
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1053
     compressBound() returns an upper bound on the compressed size after
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1054
   compress() or compress2() on sourceLen bytes.  It would be used before
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1055
   a compress() or compress2() call to allocate the destination buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1056
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1057
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1058
ZEXTERN int Q_ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1059
                                   const Bytef *source, uLong sourceLen));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1060
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1061
     Decompresses the source buffer into the destination buffer.  sourceLen is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1062
   the byte length of the source buffer. Upon entry, destLen is the total
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1063
   size of the destination buffer, which must be large enough to hold the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1064
   entire uncompressed data. (The size of the uncompressed data must have
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1065
   been saved previously by the compressor and transmitted to the decompressor
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1066
   by some mechanism outside the scope of this compression library.)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1067
   Upon exit, destLen is the actual size of the compressed buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1068
     This function can be used to decompress a whole file at once if the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1069
   input file is mmap'ed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1070
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1071
     uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1072
   enough memory, Z_BUF_ERROR if there was not enough room in the output
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1073
   buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1074
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1075
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1076
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1077
typedef voidp gzFile;
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1078
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1079
ZEXTERN gzFile Q_ZEXPORT gzopen  OF((const char *path, const char *mode));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1080
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1081
     Opens a gzip (.gz) file for reading or writing. The mode parameter
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1082
   is as in fopen ("rb" or "wb") but can also include a compression level
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1083
   ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1084
   Huffman only compression as in "wb1h", or 'R' for run-length encoding
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1085
   as in "wb1R". (See the description of deflateInit2 for more information
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1086
   about the strategy parameter.)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1087
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1088
     gzopen can be used to read a file which is not in gzip format; in this
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1089
   case gzread will directly read from the file without decompression.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1090
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1091
     gzopen returns NULL if the file could not be opened or if there was
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1092
   insufficient memory to allocate the (de)compression state; errno
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1093
   can be checked to distinguish the two cases (if errno is zero, the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1094
   zlib error is Z_MEM_ERROR).  */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1095
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1096
ZEXTERN gzFile Q_ZEXPORT gzdopen  OF((int fd, const char *mode));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1097
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1098
     gzdopen() associates a gzFile with the file descriptor fd.  File
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1099
   descriptors are obtained from calls like open, dup, creat, pipe or
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1100
   fileno (in the file has been previously opened with fopen).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1101
   The mode parameter is as in gzopen.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1102
     The next call of gzclose on the returned gzFile will also close the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1103
   file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1104
   descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1105
     gzdopen returns NULL if there was insufficient memory to allocate
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1106
   the (de)compression state.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1107
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1108
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1109
ZEXTERN int Q_ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1110
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1111
     Dynamically update the compression level or strategy. See the description
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1112
   of deflateInit2 for the meaning of these parameters.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1113
     gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1114
   opened for writing.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1115
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1116
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1117
ZEXTERN int Q_ZEXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1118
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1119
     Reads the given number of uncompressed bytes from the compressed file.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1120
   If the input file was not in gzip format, gzread copies the given number
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1121
   of bytes into the buffer.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1122
     gzread returns the number of uncompressed bytes actually read (0 for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1123
   end of file, -1 for error). */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1124
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1125
ZEXTERN int Q_ZEXPORT    gzwrite OF((gzFile file,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1126
                                   voidpc buf, unsigned len));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1127
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1128
     Writes the given number of uncompressed bytes into the compressed file.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1129
   gzwrite returns the number of uncompressed bytes actually written
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1130
   (0 in case of error).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1131
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1132
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1133
ZEXTERN int Q_ZEXPORT gzprintf OF((gzFile file, const char *format, ...));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1134
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1135
     Converts, formats, and writes the args to the compressed file under
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1136
   control of the format string, as in fprintf. gzprintf returns the number of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1137
   uncompressed bytes actually written (0 in case of error).  The number of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1138
   uncompressed bytes written is limited to 4095. The caller should assure that
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1139
   this limit is not exceeded. If it is exceeded, then gzprintf() will return
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1140
   return an error (0) with nothing written. In this case, there may also be a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1141
   buffer overflow with unpredictable consequences, which is possible only if
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1142
   zlib was compiled with the insecure functions sprintf() or vsprintf()
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1143
   because the secure snprintf() or vsnprintf() functions were not available.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1144
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1145
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1146
ZEXTERN int Q_ZEXPORT gzputs OF((gzFile file, const char *s));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1147
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1148
      Writes the given null-terminated string to the compressed file, excluding
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1149
   the terminating null character.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1150
      gzputs returns the number of characters written, or -1 in case of error.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1151
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1152
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1153
ZEXTERN Q_ZEXPORT char * gzgets OF((gzFile file, char *buf, int len));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1154
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1155
      Reads bytes from the compressed file until len-1 characters are read, or
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1156
   a newline character is read and transferred to buf, or an end-of-file
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1157
   condition is encountered.  The string is then terminated with a null
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1158
   character.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1159
      gzgets returns buf, or Z_NULL in case of error.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1160
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1161
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1162
ZEXTERN int Q_ZEXPORT    gzputc OF((gzFile file, int c));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1163
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1164
      Writes c, converted to an unsigned char, into the compressed file.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1165
   gzputc returns the value that was written, or -1 in case of error.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1166
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1167
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1168
ZEXTERN int Q_ZEXPORT    gzgetc OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1169
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1170
      Reads one byte from the compressed file. gzgetc returns this byte
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1171
   or -1 in case of end of file or error.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1172
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1173
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1174
ZEXTERN int ZEXPORT    gzungetc OF((int c, gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1175
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1176
      Push one character back onto the stream to be read again later.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1177
   Only one character of push-back is allowed.  gzungetc() returns the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1178
   character pushed, or -1 on failure.  gzungetc() will fail if a
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1179
   character has been pushed but not read yet, or if c is -1. The pushed
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1180
   character will be discarded if the stream is repositioned with gzseek()
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1181
   or gzrewind().
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1182
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1183
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1184
ZEXTERN int Q_ZEXPORT    gzflush OF((gzFile file, int flush));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1185
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1186
     Flushes all pending output into the compressed file. The parameter
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1187
   flush is as in the deflate() function. The return value is the zlib
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1188
   error number (see function gzerror below). gzflush returns Z_OK if
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1189
   the flush parameter is Z_FINISH and all output could be flushed.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1190
     gzflush should be called only when strictly necessary because it can
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1191
   degrade compression.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1192
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1193
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1194
ZEXTERN z_off_t Q_ZEXPORT    gzseek OF((gzFile file,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1195
                                      z_off_t offset, int whence));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1196
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1197
      Sets the starting position for the next gzread or gzwrite on the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1198
   given compressed file. The offset represents a number of bytes in the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1199
   uncompressed data stream. The whence parameter is defined as in lseek(2);
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1200
   the value SEEK_END is not supported.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1201
     If the file is opened for reading, this function is emulated but can be
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1202
   extremely slow. If the file is opened for writing, only forward seeks are
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1203
   supported; gzseek then compresses a sequence of zeroes up to the new
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1204
   starting position.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1205
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1206
      gzseek returns the resulting offset location as measured in bytes from
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1207
   the beginning of the uncompressed stream, or -1 in case of error, in
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1208
   particular if the file is opened for writing and the new starting position
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1209
   would be before the current position.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1210
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1211
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1212
ZEXTERN int Q_ZEXPORT    gzrewind OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1213
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1214
     Rewinds the given file. This function is supported only for reading.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1215
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1216
   gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1217
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1218
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1219
ZEXTERN z_off_t Q_ZEXPORT    gztell OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1220
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1221
     Returns the starting position for the next gzread or gzwrite on the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1222
   given compressed file. This position represents a number of bytes in the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1223
   uncompressed data stream.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1224
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1225
   gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1226
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1227
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1228
ZEXTERN int Q_ZEXPORT gzeof OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1229
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1230
     Returns 1 when EOF has previously been detected reading the given
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1231
   input stream, otherwise zero.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1232
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1233
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1234
ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1235
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1236
     Returns 1 if file is being read directly without decompression, otherwise
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1237
   zero.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1238
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1239
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1240
ZEXTERN int Q_ZEXPORT    gzclose OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1241
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1242
     Flushes all pending output if necessary, closes the compressed file
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1243
   and deallocates all the (de)compression state. The return value is the zlib
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1244
   error number (see function gzerror below).
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1245
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1246
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1247
ZEXTERN Q_ZEXPORT const char * gzerror OF((gzFile file, int *errnum));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1248
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1249
     Returns the error message for the last error which occurred on the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1250
   given compressed file. errnum is set to zlib error number. If an
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1251
   error occurred in the file system and not in the compression library,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1252
   errnum is set to Z_ERRNO and the application may consult errno
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1253
   to get the exact error code.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1254
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1255
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1256
ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1257
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1258
     Clears the error and end-of-file flags for file. This is analogous to the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1259
   clearerr() function in stdio. This is useful for continuing to read a gzip
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1260
   file that is being written concurrently.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1261
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1262
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1263
                        /* checksum functions */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1264
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1265
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1266
     These functions are not related to compression but are exported
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1267
   anyway because they might be useful in applications using the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1268
   compression library.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1269
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1270
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1271
ZEXTERN uLong Q_ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1272
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1273
     Update a running Adler-32 checksum with the bytes buf[0..len-1] and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1274
   return the updated checksum. If buf is NULL, this function returns
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1275
   the required initial value for the checksum.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1276
   An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1277
   much faster. Usage example:
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1278
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1279
     uLong adler = adler32(0L, Z_NULL, 0);
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1280
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1281
     while (read_buffer(buffer, length) != EOF) {
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1282
       adler = adler32(adler, buffer, length);
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1283
     }
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1284
     if (adler != original_adler) error();
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1285
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1286
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1287
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1288
                                          z_off_t len2));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1289
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1290
     Combine two Adler-32 checksums into one.  For two sequences of bytes, seq1
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1291
   and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1292
   each, adler1 and adler2.  adler32_combine() returns the Adler-32 checksum of
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1293
   seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1294
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1295
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1296
ZEXTERN uLong Q_ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1297
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1298
     Update a running CRC-32 with the bytes buf[0..len-1] and return the
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1299
   updated CRC-32. If buf is NULL, this function returns the required initial
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1300
   value for the for the crc. Pre- and post-conditioning (one's complement) is
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1301
   performed within this function so it shouldn't be done by the application.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1302
   Usage example:
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1303
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1304
     uLong crc = crc32(0L, Z_NULL, 0);
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1305
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1306
     while (read_buffer(buffer, length) != EOF) {
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1307
       crc = crc32(crc, buffer, length);
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1308
     }
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1309
     if (crc != original_crc) error();
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1310
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1311
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1312
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1313
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1314
/*
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1315
     Combine two CRC-32 check values into one.  For two sequences of bytes,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1316
   seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1317
   calculated for each, crc1 and crc2.  crc32_combine() returns the CRC-32
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1318
   check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1319
   len2.
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1320
*/
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1321
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1322
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1323
                        /* various hacks, don't look :) */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1324
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1325
/* deflateInit and inflateInit are macros to allow checking the zlib version
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1326
 * and the compiler's view of z_stream:
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1327
 */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1328
ZEXTERN int Q_ZEXPORT deflateInit_ OF((z_streamp strm, int level,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1329
                                     const char *version, int stream_size));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1330
ZEXTERN int Q_ZEXPORT inflateInit_ OF((z_streamp strm,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1331
                                     const char *version, int stream_size));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1332
ZEXTERN int Q_ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1333
                                      int windowBits, int memLevel,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1334
                                      int strategy, const char *version,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1335
                                      int stream_size));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1336
ZEXTERN int Q_ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1337
                                      const char *version, int stream_size));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1338
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1339
                                         unsigned char FAR *window,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1340
                                         const char *version,
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1341
                                         int stream_size));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1342
#define deflateInit(strm, level) \
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1343
        deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1344
#define inflateInit(strm) \
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1345
        inflateInit_((strm),                ZLIB_VERSION, sizeof(z_stream))
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1346
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1347
        deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1348
                      (strategy),           ZLIB_VERSION, sizeof(z_stream))
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1349
#define inflateInit2(strm, windowBits) \
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1350
        inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1351
#define inflateBackInit(strm, windowBits, window) \
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1352
        inflateBackInit_((strm), (windowBits), (window), \
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1353
        ZLIB_VERSION, sizeof(z_stream))
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1354
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1355
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1356
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1357
    struct internal_state {int dummy;}; /* hack for buggy compilers */
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1358
#endif
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1359
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1360
ZEXTERN Q_ZEXPORT const char   * zError           OF((int));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1361
ZEXTERN int            Q_ZEXPORT inflateSyncPoint OF((z_streamp z));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
  1362
ZEXTERN Q_ZEXPORT const uLongf * get_crc_table    OF((void));
0692f628d166 Add zlib headers (library itself is included to Qt)
unC0Rr
parents:
diff changeset
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZLIB_H */