aboutsummaryrefslogtreecommitdiff
path: root/compress.c
diff options
context:
space:
mode:
authorMark Adler <madler@alumni.caltech.edu>2011-09-09 23:18:57 -0700
committerMark Adler <madler@alumni.caltech.edu>2011-09-09 23:18:57 -0700
commit6759211ad8a5006689216a86c3267bb503bfccc1 (patch)
treedc0f61f4c4a44828ad7d30e376ef21840b137f44 /compress.c
parent7850e4e406dce1f7a819297eeb151d1ca18e7cd9 (diff)
downloadzlib-6759211ad8a5006689216a86c3267bb503bfccc1.tar.gz
zlib-6759211ad8a5006689216a86c3267bb503bfccc1.tar.bz2
zlib-6759211ad8a5006689216a86c3267bb503bfccc1.zip
zlib 1.0.8v1.0.8
Diffstat (limited to 'compress.c')
-rw-r--r--compress.c35
1 files changed, 23 insertions, 12 deletions
diff --git a/compress.c b/compress.c
index 7be0b3d..b77674a 100644
--- a/compress.c
+++ b/compress.c
@@ -8,22 +8,22 @@
8#include "zlib.h" 8#include "zlib.h"
9 9
10/* =========================================================================== 10/* ===========================================================================
11 Compresses the source buffer into the destination buffer. sourceLen is 11 Compresses the source buffer into the destination buffer. The level
12 the byte length of the source buffer. Upon entry, destLen is the total 12 parameter has the same meaning as in deflateInit. sourceLen is the byte
13 size of the destination buffer, which must be at least 0.1% larger than 13 length of the source buffer. Upon entry, destLen is the total size of the
14 sourceLen plus 8 bytes. Upon exit, destLen is the actual size of the 14 destination buffer, which must be at least 0.1% larger than sourceLen plus
15 compressed buffer. 15 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
16 This function can be used to compress a whole file at once if the 16
17 input file is mmap'ed. 17 compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
18 compress returns Z_OK if success, Z_MEM_ERROR if there was not 18 memory, Z_BUF_ERROR if there was not enough room in the output buffer,
19 enough memory, Z_BUF_ERROR if there was not enough room in the output 19 Z_STREAM_ERROR if the level parameter is invalid.
20 buffer.
21*/ 20*/
22int EXPORT compress (dest, destLen, source, sourceLen) 21int EXPORT compress2 (dest, destLen, source, sourceLen, level)
23 Bytef *dest; 22 Bytef *dest;
24 uLongf *destLen; 23 uLongf *destLen;
25 const Bytef *source; 24 const Bytef *source;
26 uLong sourceLen; 25 uLong sourceLen;
26 int level;
27{ 27{
28 z_stream stream; 28 z_stream stream;
29 int err; 29 int err;
@@ -42,7 +42,7 @@ int EXPORT compress (dest, destLen, source, sourceLen)
42 stream.zfree = (free_func)0; 42 stream.zfree = (free_func)0;
43 stream.opaque = (voidpf)0; 43 stream.opaque = (voidpf)0;
44 44
45 err = deflateInit(&stream, Z_DEFAULT_COMPRESSION); 45 err = deflateInit(&stream, level);
46 if (err != Z_OK) return err; 46 if (err != Z_OK) return err;
47 47
48 err = deflate(&stream, Z_FINISH); 48 err = deflate(&stream, Z_FINISH);
@@ -55,3 +55,14 @@ int EXPORT compress (dest, destLen, source, sourceLen)
55 err = deflateEnd(&stream); 55 err = deflateEnd(&stream);
56 return err; 56 return err;
57} 57}
58
59/* ===========================================================================
60 */
61int EXPORT 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}