Mercurial > ~darius > hgwebdir.cgi > paradise_server
comparison zlib/uncompr.c @ 10:1040ca591f2e
First entry of Paradise Server 2.9 patch 10 Beta
author | darius |
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date | Sat, 06 Dec 1997 04:37:18 +0000 |
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9:331055a97a9d | 10:1040ca591f2e |
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1 /* uncompr.c -- decompress a memory buffer | |
2 * Copyright (C) 1995 Jean-loup Gailly. | |
3 * For conditions of distribution and use, see copyright notice in zlib.h | |
4 */ | |
5 | |
6 /* $Id: uncompr.c,v 1.1.1.1 1997/12/06 04:37:18 darius Exp $ */ | |
7 | |
8 #include "zlib.h" | |
9 | |
10 /* =========================================================================== | |
11 Decompresses the source buffer into the destination buffer. sourceLen is | |
12 the byte length of the source buffer. Upon entry, destLen is the total | |
13 size of the destination buffer, which must be large enough to hold the | |
14 entire uncompressed data. (The size of the uncompressed data must have | |
15 been saved previously by the compressor and transmitted to the decompressor | |
16 by some mechanism outside the scope of this compression library.) | |
17 Upon exit, destLen is the actual size of the compressed buffer. | |
18 This function can be used to decompress a whole file at once if the | |
19 input file is mmap'ed. | |
20 | |
21 uncompress returns Z_OK if success, Z_MEM_ERROR if there was not | |
22 enough memory, Z_BUF_ERROR if there was not enough room in the output | |
23 buffer, or Z_DATA_ERROR if the input data was corrupted. | |
24 */ | |
25 int uncompress (dest, destLen, source, sourceLen) | |
26 Bytef *dest; | |
27 uLongf *destLen; | |
28 Bytef *source; | |
29 uLong sourceLen; | |
30 { | |
31 z_stream stream; | |
32 int err; | |
33 | |
34 stream.next_in = source; | |
35 stream.avail_in = (uInt)sourceLen; | |
36 /* Check for source > 64K on 16-bit machine: */ | |
37 if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; | |
38 | |
39 stream.next_out = dest; | |
40 stream.avail_out = (uInt)*destLen; | |
41 if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; | |
42 | |
43 stream.zalloc = (alloc_func)0; | |
44 stream.zfree = (free_func)0; | |
45 | |
46 err = inflateInit(&stream); | |
47 if (err != Z_OK) return err; | |
48 | |
49 err = inflate(&stream, Z_FINISH); | |
50 if (err != Z_STREAM_END) { | |
51 inflateEnd(&stream); | |
52 return err; | |
53 } | |
54 *destLen = stream.total_out; | |
55 | |
56 err = inflateEnd(&stream); | |
57 return err; | |
58 } |