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1 /* uncompr.c -- decompress a memory buffer | 1 /* uncompr.c -- decompress a memory buffer |
2 * Copyright (C) 1995-2003, 2010 Jean-loup Gailly. | 2 * Copyright (C) 1995-2003, 2010 Jean-loup Gailly. |
3 * For conditions of distribution and use, see copyright notice in zlib.h | 3 * For conditions of distribution and use, see copyright notice in zlib.h |
4 */ | 4 */ |
5 | 5 |
6 /* @(#) $Id$ */ | 6 /* @(#) $Id$ */ |
7 | 7 |
8 #define ZLIB_INTERNAL | 8 #define ZLIB_INTERNAL |
9 #include "zlib.h" | 9 #include "zlib.h" |
10 | 10 |
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23 */ | 23 */ |
24 int ZEXPORT uncompress (dest, destLen, source, sourceLen) | 24 int ZEXPORT uncompress (dest, destLen, source, sourceLen) |
25 Bytef *dest; | 25 Bytef *dest; |
26 uLongf *destLen; | 26 uLongf *destLen; |
27 const Bytef *source; | 27 const Bytef *source; |
28 uLong sourceLen; | 28 uLong sourceLen; |
29 { | 29 { |
30 z_stream stream; | 30 z_stream stream; |
31 int err; | 31 int err; |
32 | 32 |
33 stream.next_in = (z_const Bytef *)source; | 33 stream.next_in = (Bytef*)source; |
34 stream.avail_in = (uInt)sourceLen; | 34 stream.avail_in = (uInt)sourceLen; |
35 /* Check for source > 64K on 16-bit machine: */ | 35 /* Check for source > 64K on 16-bit machine: */ |
36 if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; | 36 if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; |
37 | 37 |
38 stream.next_out = dest; | 38 stream.next_out = dest; |
39 stream.avail_out = (uInt)*destLen; | 39 stream.avail_out = (uInt)*destLen; |
40 if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; | 40 if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; |
41 | 41 |
42 stream.zalloc = (alloc_func)0; | 42 stream.zalloc = (alloc_func)0; |
43 stream.zfree = (free_func)0; | 43 stream.zfree = (free_func)0; |
44 | 44 |
45 err = inflateInit(&stream); | 45 err = inflateInit(&stream); |
46 if (err != Z_OK) return err; | 46 if (err != Z_OK) return err; |
47 | 47 |
48 err = inflate(&stream, Z_FINISH); | 48 err = inflate(&stream, Z_FINISH); |
49 if (err != Z_STREAM_END) { | 49 if (err != Z_STREAM_END) { |
50 inflateEnd(&stream); | 50 inflateEnd(&stream); |
51 if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0)) | 51 if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0)) |
52 return Z_DATA_ERROR; | 52 return Z_DATA_ERROR; |
53 return err; | 53 return err; |
54 } | 54 } |
55 *destLen = stream.total_out; | 55 *destLen = stream.total_out; |
56 | 56 |
57 err = inflateEnd(&stream); | 57 err = inflateEnd(&stream); |
58 return err; | 58 return err; |
59 } | 59 } |
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