1/* lzo1a_99.c -- implementation of the LZO1A-99 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 42#define COMPRESS_ID 99 43 44#define DDBITS 3 45#define CLEVEL 9 46 47 48/*********************************************************************** 49// 50************************************************************************/ 51 52#define LZO_NEED_DICT_H 53#include "config1a.h" 54 55 56/*********************************************************************** 57// compression internal entry point. 58************************************************************************/ 59 60static int 61_lzo1a_do_compress ( const lzo_bytep in, lzo_uint in_len, 62 lzo_bytep out, lzo_uintp out_len, 63 lzo_voidp wrkmem, 64 lzo_compress_t func ) 65{ 66 int r; 67 68 /* don't try to compress a block that's too short */ 69 if (in_len <= 0) 70 { 71 *out_len = 0; 72 r = LZO_E_OK; 73 } 74 else if (in_len <= MIN_LOOKAHEAD + 1) 75 { 76#if defined(LZO_RETURN_IF_NOT_COMPRESSIBLE) 77 *out_len = 0; 78 r = LZO_E_NOT_COMPRESSIBLE; 79#else 80 *out_len = pd(STORE_RUN(out,in,in_len), out); 81 r = (*out_len > in_len) ? LZO_E_OK : LZO_E_ERROR; 82#endif 83 } 84 else 85 r = func(in,in_len,out,out_len,wrkmem); 86 87 return r; 88} 89 90 91/*********************************************************************** 92// 93************************************************************************/ 94 95#if !defined(COMPRESS_ID) 96#define COMPRESS_ID _LZO_ECONCAT2(DD_BITS,CLEVEL) 97#endif 98 99 100#define LZO_CODE_MATCH_INCLUDE_FILE "lzo1a_cm.ch" 101#include "lzo1b_c.ch" 102 103 104/*********************************************************************** 105// 106************************************************************************/ 107 108#define LZO_COMPRESS \ 109 LZO_CPP_ECONCAT3(lzo1a_,COMPRESS_ID,_compress) 110 111#define LZO_COMPRESS_FUNC \ 112 LZO_CPP_ECONCAT3(_lzo1a_,COMPRESS_ID,_compress_func) 113 114 115/*********************************************************************** 116// 117************************************************************************/ 118 119LZO_PUBLIC(int) 120LZO_COMPRESS ( const lzo_bytep in, lzo_uint in_len, 121 lzo_bytep out, lzo_uintp out_len, 122 lzo_voidp wrkmem ) 123{ 124 return _lzo1a_do_compress(in,in_len,out,out_len,wrkmem,do_compress); 125} 126 127 128/* 129vi:ts=4:et 130*/ 131