1/* config1a.h -- configuration for the LZO1A algorithm 2 3 This file is part of the LZO real-time data compression library. 4 5 Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer 6 Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer 7 Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer 8 Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer 9 Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer 10 Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer 11 Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer 12 Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer 13 Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer 14 Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer 15 Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer 16 Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer 17 Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer 18 All Rights Reserved. 19 20 The LZO library is free software; you can redistribute it and/or 21 modify it under the terms of the GNU General Public License as 22 published by the Free Software Foundation; either version 2 of 23 the License, or (at your option) any later version. 24 25 The LZO library is distributed in the hope that it will be useful, 26 but WITHOUT ANY WARRANTY; without even the implied warranty of 27 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 28 GNU General Public License for more details. 29 30 You should have received a copy of the GNU General Public License 31 along with the LZO library; see the file COPYING. 32 If not, write to the Free Software Foundation, Inc., 33 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 34 35 Markus F.X.J. Oberhumer 36 <markus@oberhumer.com> 37 http://www.oberhumer.com/opensource/lzo/ 38 */ 39 40 41/* WARNING: this file should *not* be used by applications. It is 42 part of the implementation of the library and is subject 43 to change. 44 */ 45 46 47#ifndef __LZO_CONFIG1A_H 48#define __LZO_CONFIG1A_H 49 50#include "lzo_conf.h" 51#include "lzo/lzo1a.h" 52 53#undef LZO_COLLECT_STATS /* no support for stats here */ 54 55 56/*********************************************************************** 57// algorithm configuration 58************************************************************************/ 59 60/* run bits (4 - 5) - the compressor and the decompressor 61 * must use the same value. */ 62#if !defined(RBITS) 63# define RBITS 5 64#endif 65 66/* dictionary depth (0 - 6) - this only affects the compressor. 67 * 0 is fastest, 6 is best compression ratio */ 68#if !defined(DDBITS) 69# define DDBITS 0 70#endif 71 72/* compression level (1 - 9) - this only affects the compressor. 73 * 1 is fastest, 9 is best compression ratio */ 74#if !defined(CLEVEL) 75# define CLEVEL 1 /* fastest by default */ 76#endif 77 78 79/* check configuration */ 80#if (RBITS < 4 || RBITS > 5) 81# error "invalid RBITS" 82#endif 83#if (DDBITS < 0 || DDBITS > 6) 84# error "invalid DDBITS" 85#endif 86#if (CLEVEL < 1 || CLEVEL > 9) 87# error "invalid CLEVEL" 88#endif 89 90 91/*********************************************************************** 92// internal configuration 93************************************************************************/ 94 95/* add a special code so that the decompressor can detect the 96 * end of the compressed data block (overhead is 3 bytes per block) */ 97#undef LZO_EOF_CODE 98 99 100/*********************************************************************** 101// algorithm internal configuration 102************************************************************************/ 103 104/* choose the hashing strategy */ 105#ifndef LZO_HASH 106#define LZO_HASH LZO_HASH_LZO_INCREMENTAL_A 107#endif 108 109/* config */ 110#define R_BITS RBITS 111#define DD_BITS DDBITS 112#ifndef D_BITS 113#define D_BITS 16 114#endif 115 116 117/*********************************************************************** 118// optimization and debugging 119************************************************************************/ 120 121/* Collect statistics */ 122#if 0 && !defined(LZO_COLLECT_STATS) 123# define LZO_COLLECT_STATS 124#endif 125 126 127/*********************************************************************** 128// 129************************************************************************/ 130 131#define M3O_BITS M2O_BITS 132#define M3L_BITS CHAR_BIT 133#define M3_MAX_LEN (M3_MIN_LEN + LZO_SIZE(M3L_BITS) - 1) 134#define _MAX_OFFSET _M2_MAX_OFFSET 135#define LZO_NO_M3 136 137#include "lzo1b_de.h" 138#include "stats1b.h" 139 140#include "lzo1b_cc.h" 141 142 143/*********************************************************************** 144// check for total LZO1/LZO1A compatibility 145************************************************************************/ 146 147#undef M2_MARKER 148#define M2_MARKER (1 << M2O_BITS) 149 150#if (R_BITS != 5) 151# error 152#endif 153#if (M2O_BITS != 5) 154# error 155#endif 156#if (M3O_BITS != 5) 157# error 158#endif 159#if (M2_MIN_LEN != 3) 160# error 161#endif 162#if (M2_MAX_LEN != 8) 163# error 164#endif 165#if (M3_MIN_LEN != 9) 166# error 167#endif 168#if (M3_MAX_LEN != 264) 169# error 170#endif 171#if (_M2_MAX_OFFSET != (1u << 13)) 172# error 173#endif 174#if (_M2_MAX_OFFSET != _M3_MAX_OFFSET) 175# error 176#endif 177#if (_M2_MAX_OFFSET != _MAX_OFFSET) 178# error 179#endif 180#if (R0MIN != 32) 181# error 182#endif 183#if (R0MAX != 287) 184# error 185#endif 186#if (R0FAST != 280) 187# error 188#endif 189 190 191#endif /* already included */ 192 193/* 194vi:ts=4:et 195*/ 196 197