Diffstat (limited to 'pwmanager/libcrypt/zlib/compress.c') (more/less context) (ignore whitespace changes)
-rw-r--r-- | pwmanager/libcrypt/zlib/compress.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/pwmanager/libcrypt/zlib/compress.c b/pwmanager/libcrypt/zlib/compress.c new file mode 100644 index 0000000..814bd9d --- a/dev/null +++ b/pwmanager/libcrypt/zlib/compress.c | |||
@@ -0,0 +1,68 @@ | |||
1 | /* compress.c -- compress a memory buffer | ||
2 | * Copyright (C) 1995-2002 Jean-loup Gailly. | ||
3 | * For conditions of distribution and use, see copyright notice in zlib.h | ||
4 | */ | ||
5 | |||
6 | /* @(#) $Id$ */ | ||
7 | |||
8 | #include "zlib.h" | ||
9 | |||
10 | /* =========================================================================== | ||
11 | Compresses the source buffer into the destination buffer. The level | ||
12 | parameter has the same meaning as in deflateInit. sourceLen is the byte | ||
13 | length of the source buffer. Upon entry, destLen is the total size of the | ||
14 | destination buffer, which must be at least 0.1% larger than sourceLen plus | ||
15 | 12 bytes. Upon exit, destLen is the actual size of the compressed buffer. | ||
16 | |||
17 | compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough | ||
18 | memory, Z_BUF_ERROR if there was not enough room in the output buffer, | ||
19 | Z_STREAM_ERROR if the level parameter is invalid. | ||
20 | */ | ||
21 | int ZEXPORT compress2 (dest, destLen, source, sourceLen, level) | ||
22 | Bytef *dest; | ||
23 | uLongf *destLen; | ||
24 | const Bytef *source; | ||
25 | uLong sourceLen; | ||
26 | int level; | ||
27 | { | ||
28 | z_stream stream; | ||
29 | int err; | ||
30 | |||
31 | stream.next_in = (Bytef*)source; | ||
32 | stream.avail_in = (uInt)sourceLen; | ||
33 | #ifdef MAXSEG_64K | ||
34 | /* Check for source > 64K on 16-bit machine: */ | ||
35 | if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR; | ||
36 | #endif | ||
37 | stream.next_out = dest; | ||
38 | stream.avail_out = (uInt)*destLen; | ||
39 | if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR; | ||
40 | |||
41 | stream.zalloc = (alloc_func)0; | ||
42 | stream.zfree = (free_func)0; | ||
43 | stream.opaque = (voidpf)0; | ||
44 | |||
45 | err = deflateInit(&stream, level); | ||
46 | if (err != Z_OK) return err; | ||
47 | |||
48 | err = deflate(&stream, Z_FINISH); | ||
49 | if (err != Z_STREAM_END) { | ||
50 | deflateEnd(&stream); | ||
51 | return err == Z_OK ? Z_BUF_ERROR : err; | ||
52 | } | ||
53 | *destLen = stream.total_out; | ||
54 | |||
55 | err = deflateEnd(&stream); | ||
56 | return err; | ||
57 | } | ||
58 | |||
59 | /* =========================================================================== | ||
60 | */ | ||
61 | int ZEXPORT compress (dest, destLen, source, sourceLen) | ||
62 | Bytef *dest; | ||
63 | uLongf *destLen; | ||
64 | const Bytef *source; | ||
65 | uLong sourceLen; | ||
66 | { | ||
67 | return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION); | ||
68 | } | ||