dlls/wininet/zlib.h

   1 /* zlib.h -- interface of the 'zlib' general purpose compression library
   2  * version 1.2.11, January 15th, 2017
   3  *
   4  * Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
   5  *
   6  * This software is provided 'as-is', without any express or implied
   7  * warranty.  In no event will the authors be held liable for any damages
   8  * arising from the use of this software.
   9  *
  10  * Permission is granted to anyone to use this software for any purpose,
  11  * including commercial applications, and to alter it and redistribute it
  12  * freely, subject to the following restrictions:
  13  *
  14  * 1. The origin of this software must not be misrepresented; you must not
  15  *    claim that you wrote the original software. If you use this software
  16  *    in a product, an acknowledgment in the product documentation would be
  17  *    appreciated but is not required.
  18  * 2. Altered source versions must be plainly marked as such, and must not be
  19  *    misrepresented as being the original software.
  20  * 3. This notice may not be removed or altered from any source distribution.
  21  *
  22  * Jean-loup Gailly        Mark Adler
  23  * jloup@gzip.org          madler@alumni.caltech.edu
  24  */
  25
  26 #ifndef ZLIB_H
  27 #define ZLIB_H
  28
  29 #include "windef.h"
  30
  31 #undef FAR
  32 #define FAR
  33 #define z_const const
  34
  35 typedef unsigned char  Byte;  /* 8 bits */
  36 typedef unsigned int   uInt;  /* 16 bits or more */
  37 typedef unsigned long  uLong; /* 32 bits or more */
  38
  39 typedef Byte  FAR Bytef;
  40 typedef void  FAR *voidpf;
  41
  42 typedef char  FAR charf;
  43 typedef int   FAR intf;
  44
  45 typedef unsigned char  uch;
  46 typedef uch FAR uchf;
  47 typedef unsigned short ush;
  48 typedef ush FAR ushf;
  49 typedef unsigned long  ulg;
  50
  51 typedef voidpf (*alloc_func)(voidpf opaque, uInt items, uInt size);
  52 typedef void   (*free_func)(voidpf opaque, voidpf address);
  53
  54 struct internal_state;
  55
  56 typedef struct z_stream_s {
  57     z_const Bytef *next_in;     /* next input byte */
  58     uInt     avail_in;  /* number of bytes available at next_in */
  59     uLong    total_in;  /* total number of input bytes read so far */
  60
  61     Bytef    *next_out; /* next output byte will go here */
  62     uInt     avail_out; /* remaining free space at next_out */
  63     uLong    total_out; /* total number of bytes output so far */
  64
  65     z_const char *msg;  /* last error message, NULL if no error */
  66     struct internal_state FAR *state; /* not visible by applications */
  67
  68     alloc_func zalloc;  /* used to allocate the internal state */
  69     free_func  zfree;   /* used to free the internal state */
  70     voidpf     opaque;  /* private data object passed to zalloc and zfree */
  71
  72     int     data_type;  /* best guess about the data type: binary or text
  73                            for deflate, or the decoding state for inflate */
  74     uLong   adler;      /* Adler-32 or CRC-32 value of the uncompressed data */
  75     uLong   reserved;   /* reserved for future use */
  76 } z_stream;
  77
  78 typedef z_stream FAR *z_streamp;
  79
  80 /*
  81      gzip header information passed to and from zlib routines.  See RFC 1952
  82   for more details on the meanings of these fields.
  83 */
  84 typedef struct gz_header_s {
  85     int     text;       /* true if compressed data believed to be text */
  86     uLong   time;       /* modification time */
  87     int     xflags;     /* extra flags (not used when writing a gzip file) */
  88     int     os;         /* operating system */
  89     Bytef   *extra;     /* pointer to extra field or Z_NULL if none */
  90     uInt    extra_len;  /* extra field length (valid if extra != Z_NULL) */
  91     uInt    extra_max;  /* space at extra (only when reading header) */
  92     Bytef   *name;      /* pointer to zero-terminated file name or Z_NULL */
  93     uInt    name_max;   /* space at name (only when reading header) */
  94     Bytef   *comment;   /* pointer to zero-terminated comment or Z_NULL */
  95     uInt    comm_max;   /* space at comment (only when reading header) */
  96     int     hcrc;       /* true if there was or will be a header crc */
  97     int     done;       /* true when done reading gzip header (not used
  98                            when writing a gzip file) */
  99 } gz_header;
 100
 101 typedef gz_header FAR *gz_headerp;
 102
 103 #define Z_NO_FLUSH      0
 104 #define Z_PARTIAL_FLUSH 1
 105 #define Z_SYNC_FLUSH    2
 106 #define Z_FULL_FLUSH    3
 107 #define Z_FINISH        4
 108 #define Z_BLOCK         5
 109 #define Z_TREES         6
 110 /* Allowed flush values; see deflate() and inflate() below for details */
 111
 112 #define Z_OK            0
 113 #define Z_STREAM_END    1
 114 #define Z_NEED_DICT     2
 115 #define Z_ERRNO        (-1)
 116 #define Z_STREAM_ERROR (-2)
 117 #define Z_DATA_ERROR   (-3)
 118 #define Z_MEM_ERROR    (-4)
 119 #define Z_BUF_ERROR    (-5)
 120 #define Z_VERSION_ERROR (-6)
 121 /* Return codes for the compression/decompression functions. Negative values
 122  * are errors, positive values are used for special but normal events.
 123  */
 124
 125 #define Z_NO_COMPRESSION         0
 126 #define Z_BEST_SPEED             1
 127 #define Z_BEST_COMPRESSION       9
 128 #define Z_DEFAULT_COMPRESSION  (-1)
 129 /* compression levels */
 130
 131 #define Z_FILTERED            1
 132 #define Z_HUFFMAN_ONLY        2
 133 #define Z_RLE                 3
 134 #define Z_FIXED               4
 135 #define Z_DEFAULT_STRATEGY    0
 136 /* compression strategy; see deflateInit2() below for details */
 137
 138 #define Z_BINARY   0
 139 #define Z_TEXT     1
 140 #define Z_ASCII    Z_TEXT   /* for compatibility with 1.2.2 and earlier */
 141 #define Z_UNKNOWN  2
 142 /* Possible values of the data_type field for deflate() */
 143
 144 #define Z_DEFLATED   8
 145 /* The deflate compression method (the only one supported in this version) */
 146
 147 #define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
 148
 149 #define MAX_WBITS   15 /* 32K LZ77 window */
 150 #define MAX_MEM_LEVEL 9
 151
 152 extern int inflateInit(z_streamp strm) DECLSPEC_HIDDEN;
 153 extern int inflateInit2(z_streamp strm, int windowBits) DECLSPEC_HIDDEN;
 154 extern int inflate(z_streamp strm, int flush) DECLSPEC_HIDDEN;
 155 extern int inflateEnd(z_streamp strm) DECLSPEC_HIDDEN;
 156
 157 extern int deflateInit(z_streamp strm, int level) DECLSPEC_HIDDEN;
 158 extern int deflateInit2(z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy) DECLSPEC_HIDDEN;
 159 extern int deflate(z_streamp strm, int flush) DECLSPEC_HIDDEN;
 160 extern int deflateEnd(z_streamp strm) DECLSPEC_HIDDEN;
 161
 162 #endif /* ZLIB_H */