uncompr.c
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1 /* uncompr.c -- decompress a memory buffer
2  * Copyright (C) 1995-2003 Jean-loup Gailly.
3  * For conditions of distribution and use, see copyright notice in zlib.h
4  */
5 
6 /* @(#) $Id$ */
7 
8 #define ZLIB_INTERNAL
9 #include "zlib.h"
10 
11 /* ===========================================================================
12  Decompresses the source buffer into the destination buffer. sourceLen is
13  the byte length of the source buffer. Upon entry, destLen is the total
14  size of the destination buffer, which must be large enough to hold the
15  entire uncompressed data. (The size of the uncompressed data must have
16  been saved previously by the compressor and transmitted to the decompressor
17  by some mechanism outside the scope of this compression library.)
18  Upon exit, destLen is the actual size of the compressed buffer.
19  This function can be used to decompress a whole file at once if the
20  input file is mmap'ed.
21 
22  uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
23  enough memory, Z_BUF_ERROR if there was not enough room in the output
24  buffer, or Z_DATA_ERROR if the input data was corrupted.
25 */
26 int ZEXPORT uncompress (dest, destLen, source, sourceLen)
27  Bytef *dest;
28  uLongf *destLen;
29  const Bytef *source;
30  uLong sourceLen;
31 {
32  z_stream stream;
33  int err;
34 
35  stream.next_in = (Bytef*)source;
36  stream.avail_in = (uInt)sourceLen;
37  /* Check for source > 64K on 16-bit machine: */
38  if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
39 
40  stream.next_out = dest;
41  stream.avail_out = (uInt)*destLen;
42  if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
43 
44  stream.zalloc = (alloc_func)0;
45  stream.zfree = (free_func)0;
46 
47  err = inflateInit(&stream);
48  if (err != Z_OK) return err;
49 
50  err = inflate(&stream, Z_FINISH);
51  if (err != Z_STREAM_END) {
52  inflateEnd(&stream);
53  if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
54  return Z_DATA_ERROR;
55  return err;
56  }
57  *destLen = stream.total_out;
58 
59  err = inflateEnd(&stream);
60  return err;
61 }
Bytef * next_in
Definition: zlib.h:83
int ZEXPORT uncompress(Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)
Definition: uncompr.c:26
uInt avail_in
Definition: zlib.h:84
#define Z_NEED_DICT
Definition: zlib.h:172
unsigned long uLong
Definition: zconf.h:264
Byte FAR Bytef
Definition: zconf.h:270
free_func zfree
Definition: zlib.h:95
#define Z_FINISH
Definition: zlib.h:166
#define Z_DATA_ERROR
Definition: zlib.h:175
#define Z_STREAM_END
Definition: zlib.h:171
alloc_func zalloc
Definition: zlib.h:94
Bytef * next_out
Definition: zlib.h:87
uLong total_out
Definition: zlib.h:89
uLong FAR uLongf
Definition: zconf.h:275
#define Z_BUF_ERROR
Definition: zlib.h:177
#define inflateInit(strm)
Definition: zlib.h:1333
uInt avail_out
Definition: zlib.h:88
#define Z_OK
Definition: zlib.h:170
int ZEXPORT inflate(z_streamp strm, int flush)
Definition: inflate.c:554
#define const
Definition: zconf.h:124
#define ZEXPORT
Definition: zconf.h:250
int ZEXPORT inflateEnd(z_streamp strm)
Definition: inflate.c:1155
unsigned int uInt
Definition: zconf.h:263


openhrp3
Author(s): AIST, General Robotix Inc., Nakamura Lab of Dept. of Mechano Informatics at University of Tokyo
autogenerated on Sat Apr 13 2019 02:14:25