[mirror_ubuntu-bionic-kernel.git] / include / linux / lzo.h

#ifndef __LZO_H__
#define __LZO_H__
/*
 *  LZO Public Kernel Interface
 *  A mini subset of the LZO real-time data compression library
 *
 *  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 Linux kernel use by:
 *  Nitin Gupta <nitingupta910@gmail.com>
 *  Richard Purdie <rpurdie@openedhand.com>
 */

#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 '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);

/* safe decompression with overrun testing */
int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
			  unsigned char *dst, size_t *dst_len);

/*
 * Return values (< 0 = Error)
 */
#define LZO_E_OK			0
#define LZO_E_ERROR			(-1)
#define LZO_E_OUT_OF_MEMORY		(-2)
#define LZO_E_NOT_COMPRESSIBLE		(-3)
#define LZO_E_INPUT_OVERRUN		(-4)
#define LZO_E_OUTPUT_OVERRUN		(-5)
#define LZO_E_LOOKBEHIND_OVERRUN	(-6)
#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
Commit	Line	Data
64c70b1c RP	1	#ifndef __LZO_H__
	2	#define __LZO_H__
	3	/*
	4	* LZO Public Kernel Interface
	5	* A mini subset of the LZO real-time data compression library
	6	*
8b975bd3	7	* Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
64c70b1c RP	8	*
	9	* The full LZO package can be found at:
	10	* http://www.oberhumer.com/opensource/lzo/
	11	*
8b975bd3	12	* Changed for Linux kernel use by:
64c70b1c RP	13	* Nitin Gupta <nitingupta910@gmail.com>
	14	* Richard Purdie <rpurdie@openedhand.com>
	15	*/
	16
8b975bd3 MO	17	#define LZO1X_1_MEM_COMPRESS (8192 * sizeof(unsigned short))
8b975bd3 MO	18	#define LZO1X_MEM_COMPRESS LZO1X_1_MEM_COMPRESS
64c70b1c	19
f2a11b15	20	#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
64c70b1c	21
8b975bd3	22	/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
64c70b1c	23	int lzo1x_1_compress(const unsigned char *src, size_t src_len,
8b975bd3	24	unsigned char dst, size_t dst_len, void *wrkmem);
64c70b1c RP	25
	26	/* safe decompression with overrun testing */
	27	int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
8b975bd3	28	unsigned char dst, size_t dst_len);
64c70b1c RP	29
	30	/*
	31	* Return values (< 0 = Error)
	32	*/
	33	#define LZO_E_OK 0
	34	#define LZO_E_ERROR (-1)
	35	#define LZO_E_OUT_OF_MEMORY (-2)
	36	#define LZO_E_NOT_COMPRESSIBLE (-3)
	37	#define LZO_E_INPUT_OVERRUN (-4)
	38	#define LZO_E_OUTPUT_OVERRUN (-5)
	39	#define LZO_E_LOOKBEHIND_OVERRUN (-6)
	40	#define LZO_E_EOF_NOT_FOUND (-7)
	41	#define LZO_E_INPUT_NOT_CONSUMED (-8)
	42	#define LZO_E_NOT_YET_IMPLEMENTED (-9)
8b975bd3	43	#define LZO_E_INVALID_ARGUMENT (-10)
64c70b1c RP	44
64c70b1c RP	45	#endif