#include "fastlz.c"
Go to the source code of this file.
Defines | |
| #define | FASTLZ_SAFE |
| #define | FASTLZ_EXPECT_CONDITIONAL(c) (c) |
| #define | FASTLZ_UNEXPECT_CONDITIONAL(c) (c) |
| #define | FASTLZ_INLINE |
| #define | FASTLZ_STRICT_ALIGN |
| #define | MAX_COPY 32 |
| #define | MAX_LEN 264 |
| #define | MAX_DISTANCE 8192 |
| #define | FASTLZ_READU16(p) ((p)[0] | (p)[1]<<8) |
| #define | HASH_LOG 13 |
| #define | HASH_SIZE (1<< HASH_LOG) |
| #define | HASH_MASK (HASH_SIZE-1) |
| #define | HASH_FUNCTION(v, p) { v = FASTLZ_READU16(p); v ^= FASTLZ_READU16(p+1)^(v>>(16-HASH_LOG));v &= HASH_MASK; } |
| #define | FASTLZ_LEVEL 1 |
| #define | FASTLZ_COMPRESSOR fastlz1_compress |
| #define | FASTLZ_DECOMPRESSOR fastlz1_decompress |
| #define | FASTLZ_LEVEL 2 |
| #define | MAX_DISTANCE 8191 |
| #define | MAX_FARDISTANCE (65535+MAX_DISTANCE-1) |
| #define | FASTLZ_COMPRESSOR fastlz2_compress |
| #define | FASTLZ_DECOMPRESSOR fastlz2_decompress |
Typedefs | |
| typedef unsigned char | flzuint8 |
| typedef unsigned short | flzuint16 |
| typedef unsigned int | flzuint32 |
Functions | |
| int | fastlz_compress (const void *input, int length, void *output) |
| Compress a block of data in the input buffer and returns the size of compressed block. | |
| int | fastlz_compress_level (int level, const void *input, int length, void *output) |
| Compress a block of data in the input buffer and returns the size of compressed block. | |
| int | fastlz_decompress (const void *input, int length, void *output, int maxout) |
| Decompress a block of compressed data and returns the size of the decompressed block. | |
| static FASTLZ_INLINE int | FASTLZ_COMPRESSOR (const void *input, int length, void *output) |
| static FASTLZ_INLINE int | FASTLZ_DECOMPRESSOR (const void *input, int length, void *output, int maxout) |
Define Documentation
| #define HASH_FUNCTION | ( | v, | ||
| p | ||||
| ) | { v = FASTLZ_READU16(p); v ^= FASTLZ_READU16(p+1)^(v>>(16-HASH_LOG));v &= HASH_MASK; } |
Typedef Documentation
Function Documentation
| int fastlz_compress | ( | const void * | input, | |
| int | length, | |||
| void * | output | |||
| ) |
Compress a block of data in the input buffer and returns the size of compressed block.
The size of input buffer is specified by length. The minimum input buffer size is 16.
The output buffer must be at least 5% larger than the input buffer and can not be smaller than 66 bytes.
If the input is not compressible, the return value might be larger than length (input buffer size).
The input buffer and the output buffer can not overlap.
Definition at line 130 of file fastlz.c.
Referenced by RamCacheCLFUS::compress_entries().
| int fastlz_compress_level | ( | int | level, | |
| const void * | input, | |||
| int | length, | |||
| void * | output | |||
| ) |
Compress a block of data in the input buffer and returns the size of compressed block.
The size of input buffer is specified by length. The minimum input buffer size is 16.
The output buffer must be at least 5% larger than the input buffer and can not be smaller than 66 bytes.
If the input is not compressible, the return value might be larger than length (input buffer size).
The input buffer and the output buffer can not overlap.
Compression level can be specified in parameter level. At the moment, only level 1 and level 2 are supported. Level 1 is the fastest compression and generally useful for short data. Level 2 is slightly slower but it gives better compression ratio.
Note that the compressed data, regardless of the level, can always be decompressed using the function fastlz_decompress above.
| static FASTLZ_INLINE int FASTLZ_COMPRESSOR | ( | const void * | input, | |
| int | length, | |||
| void * | output | |||
| ) | [static] |
| int fastlz_decompress | ( | const void * | input, | |
| int | length, | |||
| void * | output, | |||
| int | maxout | |||
| ) |
Decompress a block of compressed data and returns the size of the decompressed block.
If error occurs, e.g. the compressed data is corrupted or the output buffer is not large enough, then 0 (zero) will be returned instead.
The input buffer and the output buffer can not overlap.
Decompression is memory safe and guaranteed not to write the output buffer more than what is specified in maxout.
Definition at line 140 of file fastlz.c.
Referenced by RamCacheCLFUS::get().
| static FASTLZ_INLINE int FASTLZ_DECOMPRESSOR | ( | const void * | input, | |
| int | length, | |||
| void * | output, | |||
| int | maxout | |||
| ) | [static] |
