1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 264c70b1cSRichard Purdie #ifndef __LZO_H__ 364c70b1cSRichard Purdie #define __LZO_H__ 464c70b1cSRichard Purdie /* 564c70b1cSRichard Purdie * LZO Public Kernel Interface 664c70b1cSRichard Purdie * A mini subset of the LZO real-time data compression library 764c70b1cSRichard Purdie * 88b975bd3SMarkus F.X.J. Oberhumer * Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <[email protected]> 964c70b1cSRichard Purdie * 1064c70b1cSRichard Purdie * The full LZO package can be found at: 1164c70b1cSRichard Purdie * http://www.oberhumer.com/opensource/lzo/ 1264c70b1cSRichard Purdie * 138b975bd3SMarkus F.X.J. Oberhumer * Changed for Linux kernel use by: 1464c70b1cSRichard Purdie * Nitin Gupta <[email protected]> 1564c70b1cSRichard Purdie * Richard Purdie <[email protected]> 1664c70b1cSRichard Purdie */ 1764c70b1cSRichard Purdie 188b975bd3SMarkus F.X.J. Oberhumer #define LZO1X_1_MEM_COMPRESS (8192 * sizeof(unsigned short)) 198b975bd3SMarkus F.X.J. Oberhumer #define LZO1X_MEM_COMPRESS LZO1X_1_MEM_COMPRESS 2064c70b1cSRichard Purdie 215ee4014aSDave Rodgman #define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3 + 2) 2264c70b1cSRichard Purdie 238b975bd3SMarkus F.X.J. Oberhumer /* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */ 2464c70b1cSRichard Purdie int lzo1x_1_compress(const unsigned char *src, size_t src_len, 2564c70b1cSRichard Purdie unsigned char *dst, size_t *dst_len, void *wrkmem); 2664c70b1cSRichard Purdie 27*cc47f072SHerbert Xu /* Same as above but does not write more than dst_len to dst. */ 28*cc47f072SHerbert Xu int lzo1x_1_compress_safe(const unsigned char *src, size_t src_len, 29*cc47f072SHerbert Xu unsigned char *dst, size_t *dst_len, void *wrkmem); 30*cc47f072SHerbert Xu 3145ec975eSDave Rodgman /* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */ 3245ec975eSDave Rodgman int lzorle1x_1_compress(const unsigned char *src, size_t src_len, 3345ec975eSDave Rodgman unsigned char *dst, size_t *dst_len, void *wrkmem); 3445ec975eSDave Rodgman 35*cc47f072SHerbert Xu /* Same as above but does not write more than dst_len to dst. */ 36*cc47f072SHerbert Xu int lzorle1x_1_compress_safe(const unsigned char *src, size_t src_len, 37*cc47f072SHerbert Xu unsigned char *dst, size_t *dst_len, void *wrkmem); 38*cc47f072SHerbert Xu 3964c70b1cSRichard Purdie /* safe decompression with overrun testing */ 4064c70b1cSRichard Purdie int lzo1x_decompress_safe(const unsigned char *src, size_t src_len, 4164c70b1cSRichard Purdie unsigned char *dst, size_t *dst_len); 4264c70b1cSRichard Purdie 4364c70b1cSRichard Purdie /* 4464c70b1cSRichard Purdie * Return values (< 0 = Error) 4564c70b1cSRichard Purdie */ 4664c70b1cSRichard Purdie #define LZO_E_OK 0 4764c70b1cSRichard Purdie #define LZO_E_ERROR (-1) 4864c70b1cSRichard Purdie #define LZO_E_OUT_OF_MEMORY (-2) 4964c70b1cSRichard Purdie #define LZO_E_NOT_COMPRESSIBLE (-3) 5064c70b1cSRichard Purdie #define LZO_E_INPUT_OVERRUN (-4) 5164c70b1cSRichard Purdie #define LZO_E_OUTPUT_OVERRUN (-5) 5264c70b1cSRichard Purdie #define LZO_E_LOOKBEHIND_OVERRUN (-6) 5364c70b1cSRichard Purdie #define LZO_E_EOF_NOT_FOUND (-7) 5464c70b1cSRichard Purdie #define LZO_E_INPUT_NOT_CONSUMED (-8) 5564c70b1cSRichard Purdie #define LZO_E_NOT_YET_IMPLEMENTED (-9) 568b975bd3SMarkus F.X.J. Oberhumer #define LZO_E_INVALID_ARGUMENT (-10) 5764c70b1cSRichard Purdie 5864c70b1cSRichard Purdie #endif 59