diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/zlib/compress.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/zlib/compress.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/zlib/compress.c b/libraries/irrlicht-1.8/source/Irrlicht/zlib/compress.c new file mode 100644 index 0000000..c46727a --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/zlib/compress.c | |||
@@ -0,0 +1,80 @@ | |||
1 | /* compress.c -- compress a memory buffer | ||
2 | * Copyright (C) 1995-2005 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 | Compresses the source buffer into the destination buffer. The level | ||
13 | parameter has the same meaning as in deflateInit. sourceLen is the byte | ||
14 | length of the source buffer. Upon entry, destLen is the total size of the | ||
15 | destination buffer, which must be at least 0.1% larger than sourceLen plus | ||
16 | 12 bytes. Upon exit, destLen is the actual size of the compressed buffer. | ||
17 | |||
18 | compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough | ||
19 | memory, Z_BUF_ERROR if there was not enough room in the output buffer, | ||
20 | Z_STREAM_ERROR if the level parameter is invalid. | ||
21 | */ | ||
22 | int ZEXPORT compress2 (dest, destLen, source, sourceLen, level) | ||
23 | Bytef *dest; | ||
24 | uLongf *destLen; | ||
25 | const Bytef *source; | ||
26 | uLong sourceLen; | ||
27 | int level; | ||
28 | { | ||
29 | z_stream stream; | ||
30 | int err; | ||
31 | |||
32 | stream.next_in = (Bytef*)source; | ||
33 | stream.avail_in = (uInt)sourceLen; | ||
34 | #ifdef MAXSEG_64K | ||
35 | /* Check for source > 64K on 16-bit machine: */ | ||
36 | if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; | ||
37 | #endif | ||
38 | stream.next_out = dest; | ||
39 | stream.avail_out = (uInt)*destLen; | ||
40 | if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; | ||
41 | |||
42 | stream.zalloc = (alloc_func)0; | ||
43 | stream.zfree = (free_func)0; | ||
44 | stream.opaque = (voidpf)0; | ||
45 | |||
46 | err = deflateInit(&stream, level); | ||
47 | if (err != Z_OK) return err; | ||
48 | |||
49 | err = deflate(&stream, Z_FINISH); | ||
50 | if (err != Z_STREAM_END) { | ||
51 | deflateEnd(&stream); | ||
52 | return err == Z_OK ? Z_BUF_ERROR : err; | ||
53 | } | ||
54 | *destLen = stream.total_out; | ||
55 | |||
56 | err = deflateEnd(&stream); | ||
57 | return err; | ||
58 | } | ||
59 | |||
60 | /* =========================================================================== | ||
61 | */ | ||
62 | int ZEXPORT compress (dest, destLen, source, sourceLen) | ||
63 | Bytef *dest; | ||
64 | uLongf *destLen; | ||
65 | const Bytef *source; | ||
66 | uLong sourceLen; | ||
67 | { | ||
68 | return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION); | ||
69 | } | ||
70 | |||
71 | /* =========================================================================== | ||
72 | If the default memLevel or windowBits for deflateInit() is changed, then | ||
73 | this function needs to be updated. | ||
74 | */ | ||
75 | uLong ZEXPORT compressBound (sourceLen) | ||
76 | uLong sourceLen; | ||
77 | { | ||
78 | return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + | ||
79 | (sourceLen >> 25) + 13; | ||
80 | } | ||