blob: 8981d04f96c9b3fdf260568d5af264b11baea4b0 [file] [log] [blame]
Stefan Roeseb1b4e892009-03-19 15:34:56 +01001#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 *
7 * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
8 *
9 * The full LZO package can be found at:
10 * http://www.oberhumer.com/opensource/lzo/
11 *
12 * Changed for kernel use by:
13 * Nitin Gupta <nitingupta910@gmail.com>
14 * Richard Purdie <rpurdie@openedhand.com>
15 */
16
17#define LZO1X_MEM_COMPRESS (16384 * sizeof(unsigned char *))
18#define LZO1X_1_MEM_COMPRESS LZO1X_MEM_COMPRESS
19
20#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
21
22/* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
23int lzo1x_1_compress(const unsigned char *src, size_t src_len,
24 unsigned char *dst, size_t *dst_len, void *wrkmem);
25
26/* safe decompression with overrun testing */
27int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
28 unsigned char *dst, size_t *dst_len);
29
Peter Korsgaard20dde482009-11-19 11:37:51 +010030/* decompress lzop format */
31int lzop_decompress(const unsigned char *src, size_t src_len,
32 unsigned char *dst, size_t *dst_len);
33
Jean-Jacques Hiblotd753f942017-09-15 12:57:28 +020034/* check if the header is valid (based on magic numbers) */
35bool lzop_is_valid_header(const unsigned char *src);
36
Stefan Roeseb1b4e892009-03-19 15:34:56 +010037/*
38 * Return values (< 0 = Error)
39 */
40#define LZO_E_OK 0
41#define LZO_E_ERROR (-1)
42#define LZO_E_OUT_OF_MEMORY (-2)
43#define LZO_E_NOT_COMPRESSIBLE (-3)
44#define LZO_E_INPUT_OVERRUN (-4)
45#define LZO_E_OUTPUT_OVERRUN (-5)
46#define LZO_E_LOOKBEHIND_OVERRUN (-6)
47#define LZO_E_EOF_NOT_FOUND (-7)
48#define LZO_E_INPUT_NOT_CONSUMED (-8)
49#define LZO_E_NOT_YET_IMPLEMENTED (-9)
50
51#endif