1b1b4e89aSStefan Roese #ifndef __LZO_H__ 2b1b4e89aSStefan Roese #define __LZO_H__ 3b1b4e89aSStefan Roese /* 4b1b4e89aSStefan Roese * LZO Public Kernel Interface 5b1b4e89aSStefan Roese * A mini subset of the LZO real-time data compression library 6b1b4e89aSStefan Roese * 7b1b4e89aSStefan Roese * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com> 8b1b4e89aSStefan Roese * 9b1b4e89aSStefan Roese * The full LZO package can be found at: 10b1b4e89aSStefan Roese * http://www.oberhumer.com/opensource/lzo/ 11b1b4e89aSStefan Roese * 12b1b4e89aSStefan Roese * Changed for kernel use by: 13b1b4e89aSStefan Roese * Nitin Gupta <nitingupta910@gmail.com> 14b1b4e89aSStefan Roese * Richard Purdie <rpurdie@openedhand.com> 15b1b4e89aSStefan Roese */ 16b1b4e89aSStefan Roese 17b1b4e89aSStefan Roese #define LZO1X_MEM_COMPRESS (16384 * sizeof(unsigned char *)) 18b1b4e89aSStefan Roese #define LZO1X_1_MEM_COMPRESS LZO1X_MEM_COMPRESS 19b1b4e89aSStefan Roese 20b1b4e89aSStefan Roese #define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3) 21b1b4e89aSStefan Roese 22b1b4e89aSStefan Roese /* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */ 23b1b4e89aSStefan Roese int lzo1x_1_compress(const unsigned char *src, size_t src_len, 24b1b4e89aSStefan Roese unsigned char *dst, size_t *dst_len, void *wrkmem); 25b1b4e89aSStefan Roese 26b1b4e89aSStefan Roese /* safe decompression with overrun testing */ 27b1b4e89aSStefan Roese int lzo1x_decompress_safe(const unsigned char *src, size_t src_len, 28b1b4e89aSStefan Roese unsigned char *dst, size_t *dst_len); 29b1b4e89aSStefan Roese 3020dde48bSPeter Korsgaard /* decompress lzop format */ 3120dde48bSPeter Korsgaard int lzop_decompress(const unsigned char *src, size_t src_len, 3220dde48bSPeter Korsgaard unsigned char *dst, size_t *dst_len); 3320dde48bSPeter Korsgaard 34*d753f942SJean-Jacques Hiblot /* check if the header is valid (based on magic numbers) */ 35*d753f942SJean-Jacques Hiblot bool lzop_is_valid_header(const unsigned char *src); 36*d753f942SJean-Jacques Hiblot 37b1b4e89aSStefan Roese /* 38b1b4e89aSStefan Roese * Return values (< 0 = Error) 39b1b4e89aSStefan Roese */ 40b1b4e89aSStefan Roese #define LZO_E_OK 0 41b1b4e89aSStefan Roese #define LZO_E_ERROR (-1) 42b1b4e89aSStefan Roese #define LZO_E_OUT_OF_MEMORY (-2) 43b1b4e89aSStefan Roese #define LZO_E_NOT_COMPRESSIBLE (-3) 44b1b4e89aSStefan Roese #define LZO_E_INPUT_OVERRUN (-4) 45b1b4e89aSStefan Roese #define LZO_E_OUTPUT_OVERRUN (-5) 46b1b4e89aSStefan Roese #define LZO_E_LOOKBEHIND_OVERRUN (-6) 47b1b4e89aSStefan Roese #define LZO_E_EOF_NOT_FOUND (-7) 48b1b4e89aSStefan Roese #define LZO_E_INPUT_NOT_CONSUMED (-8) 49b1b4e89aSStefan Roese #define LZO_E_NOT_YET_IMPLEMENTED (-9) 50b1b4e89aSStefan Roese 51b1b4e89aSStefan Roese #endif 52