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lib/lzo: Update LZO compression to current upstream version

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This commit updates the kernel LZO code to the current upsteam version
which features a significant speed improvement - benchmarking the Calgary
and Silesia test corpora typically shows a doubled performance in
both compression and decompression on modern i386/x86_64/powerpc machines.

Signed-off-by: Markus F.X.J. Oberhumer <markus@oberhumer.com>
This commit is contained in:
Markus F.X.J. Oberhumer 2012-08-13 17:25:44 +02:00
parent b6bec26cea
commit 8b975bd3f9
4 changed files with 405 additions and 353 deletions
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15
include/linux/lzo.h
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@ -4,28 +4,28 @@
* LZO Public Kernel Interface
* A mini subset of the LZO real-time data compression library
*
* Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
* Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
*
* The full LZO package can be found at:
* http://www.oberhumer.com/opensource/lzo/
*
* Changed for kernel use by:
* Changed for Linux kernel use by:
* Nitin Gupta <nitingupta910@gmail.com>
* Richard Purdie <rpurdie@openedhand.com>
*/
#define LZO1X_MEM_COMPRESS (16384 * sizeof(unsigned char *))
#define LZO1X_1_MEM_COMPRESS LZO1X_MEM_COMPRESS
#define LZO1X_1_MEM_COMPRESS (8192 * sizeof(unsigned short))
#define LZO1X_MEM_COMPRESS LZO1X_1_MEM_COMPRESS
#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
/* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
int lzo1x_1_compress(const unsigned char *src, size_t src_len,
unsigned char *dst, size_t *dst_len, void *wrkmem);
unsigned char *dst, size_t *dst_len, void *wrkmem);
/* safe decompression with overrun testing */
int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
unsigned char *dst, size_t *dst_len);
unsigned char *dst, size_t *dst_len);
/*
* Return values (< 0 = Error)
@ -40,5 +40,6 @@ int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
#define LZO_E_EOF_NOT_FOUND (-7)
#define LZO_E_INPUT_NOT_CONSUMED (-8)
#define LZO_E_NOT_YET_IMPLEMENTED (-9)
#define LZO_E_INVALID_ARGUMENT (-10)
#endif