1e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 2e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Copyright (c) 2000-2007 Marc Alexander Lehmann <schmorp@schmorp.de> 3e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 4e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Redistribution and use in source and binary forms, with or without modifica- 5e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * tion, are permitted provided that the following conditions are met: 6e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 7e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 1. Redistributions of source code must retain the above copyright notice, 8e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * this list of conditions and the following disclaimer. 9e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 10e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 2. Redistributions in binary form must reproduce the above copyright 11e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * notice, this list of conditions and the following disclaimer in the 12e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * documentation and/or other materials provided with the distribution. 13e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 14e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 15e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 16e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 17e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 18e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 22e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 23e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * OF THE POSSIBILITY OF SUCH DAMAGE. 24e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 25e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Alternatively, the contents of this file may be used under the terms of 26e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * the GNU General Public License ("GPL") version 2 or any later version, 27e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * in which case the provisions of the GPL are applicable instead of 28e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * the above. If you wish to allow the use of your version of this file 29e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * only under the terms of the GPL and not to allow others to use your 30e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * version of this file under the BSD license, indicate your decision 31e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * by deleting the provisions above and replace them with the notice 32e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * and other provisions required by the GPL. If you do not delete the 33e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * provisions above, a recipient may use your version of this file under 34e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * either the BSD or the GPL. 35e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 36e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 37e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef LZFP_h 38e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#define LZFP_h 39e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 40e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#define STANDALONE 1 /* at the moment, this is ok. */ 41e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 42e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef STANDALONE 43e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include "lzf.h" 44e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 45e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 46e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 47e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Size of hashtable is (1 << HLOG) * sizeof (char *) 48e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * decompression is independent of the hash table size 49e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * the difference between 15 and 14 is very small 50e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * for small blocks (and 14 is usually a bit faster). 51e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * For a low-memory/faster configuration, use HLOG == 13; 52e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * For best compression, use 15 or 16 (or more, up to 22). 53e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 54e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef HLOG 55e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define HLOG 16 56e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 57e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 58e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 59e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Sacrifice very little compression quality in favour of compression speed. 60e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * This gives almost the same compression as the default code, and is 61e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * (very roughly) 15% faster. This is the preferred mode of operation. 62e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 63e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef VERY_FAST 64e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define VERY_FAST 1 65e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 66e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 67e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 68e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Sacrifice some more compression quality in favour of compression speed. 69e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * (roughly 1-2% worse compression for large blocks and 70e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 9-10% for small, redundant, blocks and >>20% better speed in both cases) 71e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * In short: when in need for speed, enable this for binary data, 72e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * possibly disable this for text data. 73e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 74e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef ULTRA_FAST 75e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define ULTRA_FAST 0 76e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 77e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 78e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 79e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Unconditionally aligning does not cost very much, so do it if unsure 80e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 81e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef STRICT_ALIGN 82e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define STRICT_ALIGN !(defined(__i386) || defined (__amd64)) 83e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 84e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 85e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 86e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * You may choose to pre-set the hash table (might be faster on some 87e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * modern cpus and large (>>64k) blocks, and also makes compression 88e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * deterministic/repeatable when the configuration otherwise is the same). 89e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 90e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef INIT_HTAB 91e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define INIT_HTAB 0 92e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 93e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 94e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 95e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Avoid assigning values to errno variable? for some embedding purposes 96e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * (linux kernel for example), this is necessary. NOTE: this breaks 97e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * the documentation in lzf.h. Avoiding errno has no speed impact. 98e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 99e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef AVOID_ERRNO 100e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define AVOID_ERRNO 0 101e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 102e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 103e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 104e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Whether to pass the LZF_STATE variable as argument, or allocate it 105e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * on the stack. For small-stack environments, define this to 1. 106e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * NOTE: this breaks the prototype in lzf.h. 107e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 108e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef LZF_STATE_ARG 109e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define LZF_STATE_ARG 0 110e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 111e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 112e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 113e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Whether to add extra checks for input validity in lzf_decompress 114e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * and return EINVAL if the input stream has been corrupted. This 115e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * only shields against overflowing the input buffer and will not 116e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * detect most corrupted streams. 117e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * This check is not normally noticeable on modern hardware 118e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * (<1% slowdown), but might slow down older cpus considerably. 119e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 120e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef CHECK_INPUT 121e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define CHECK_INPUT 1 122e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 123e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 124e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* 125e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * Whether to store pointers or offsets inside the hash table. On 126e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * 64 bit architetcures, pointers take up twice as much space, 127e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li * and might also be slower. Default is to autodetect. 128e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li */ 129e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/*#define LZF_USER_OFFSETS autodetect */ 130e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 131e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/*****************************************************************************/ 132e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* nothing should be changed below */ 133e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 134e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifdef __cplusplus 135e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include <cstring> 136e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include <climits> 137e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Liusing namespace std; 138e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#else 139e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include <string.h> 140e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include <limits.h> 141e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 142e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 143e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#ifndef LZF_USE_OFFSETS 144e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# if defined (WIN32) 145e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define LZF_USE_OFFSETS defined(_M_X64) 146e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# else 147e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# if __cplusplus > 199711L 148e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include <cstdint> 149e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# else 150e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# include <stdint.h> 151e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# endif 152e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define LZF_USE_OFFSETS (UINTPTR_MAX > 0xffffffffU) 153e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# endif 154e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 155e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 156e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Litypedef unsigned char u8; 157e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 158e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#if LZF_USE_OFFSETS 159e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define LZF_HSLOT_BIAS ((const u8 *)in_data) 160e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li typedef unsigned int LZF_HSLOT; 161e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#else 162e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define LZF_HSLOT_BIAS 0 163e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li typedef const u8 *LZF_HSLOT; 164e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 165e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 166e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Litypedef LZF_HSLOT LZF_STATE[1 << (HLOG)]; 167e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 168e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#if !STRICT_ALIGN 169e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li/* for unaligned accesses we need a 16 bit datatype. */ 170e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# if USHRT_MAX == 65535 171e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li typedef unsigned short u16; 172e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# elif UINT_MAX == 65535 173e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li typedef unsigned int u16; 174e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# else 175e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# undef STRICT_ALIGN 176e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# define STRICT_ALIGN 1 177e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# endif 178e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 179e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 180e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#if ULTRA_FAST 181e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li# undef VERY_FAST 182e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 183e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 184e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li#endif 185e54acca48ba1ab84ac7c693de45ed31ac3f311c2David Li 186