Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LZO_H__
3#define __LZO_H__
4/*
5 * LZO Public Kernel Interface
6 * A mini subset of the LZO real-time data compression library
7 *
8 * Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
9 *
10 * The full LZO package can be found at:
11 * http://www.oberhumer.com/opensource/lzo/
12 *
13 * Changed for Linux kernel use by:
14 * Nitin Gupta <nitingupta910@gmail.com>
15 * Richard Purdie <rpurdie@openedhand.com>
16 */
17
18#define LZO1X_1_MEM_COMPRESS (8192 * sizeof(unsigned short))
19#define LZO1X_MEM_COMPRESS LZO1X_1_MEM_COMPRESS
20
21#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3 + 2)
22
23/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
24int lzo1x_1_compress(const unsigned char *src, size_t src_len,
25 unsigned char *dst, size_t *dst_len, void *wrkmem);
26
27/* Same as above but does not write more than dst_len to dst. */
28int lzo1x_1_compress_safe(const unsigned char *src, size_t src_len,
29 unsigned char *dst, size_t *dst_len, void *wrkmem);
30
31/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
32int lzorle1x_1_compress(const unsigned char *src, size_t src_len,
33 unsigned char *dst, size_t *dst_len, void *wrkmem);
34
35/* Same as above but does not write more than dst_len to dst. */
36int lzorle1x_1_compress_safe(const unsigned char *src, size_t src_len,
37 unsigned char *dst, size_t *dst_len, void *wrkmem);
38
39/* safe decompression with overrun testing */
40int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
41 unsigned char *dst, size_t *dst_len);
42
43/*
44 * Return values (< 0 = Error)
45 */
46#define LZO_E_OK 0
47#define LZO_E_ERROR (-1)
48#define LZO_E_OUT_OF_MEMORY (-2)
49#define LZO_E_NOT_COMPRESSIBLE (-3)
50#define LZO_E_INPUT_OVERRUN (-4)
51#define LZO_E_OUTPUT_OVERRUN (-5)
52#define LZO_E_LOOKBEHIND_OVERRUN (-6)
53#define LZO_E_EOF_NOT_FOUND (-7)
54#define LZO_E_INPUT_NOT_CONSUMED (-8)
55#define LZO_E_NOT_YET_IMPLEMENTED (-9)
56#define LZO_E_INVALID_ARGUMENT (-10)
57
58#endif