1/* lzo1_99.c -- implementation of the LZO1-99 algorithm 2 3 This file is part of the LZO real-time data compression library. 4 5 Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer 6 Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer 7 Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer 8 Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer 9 Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer 10 Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer 11 Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer 12 Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer 13 Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer 14 Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer 15 Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer 16 Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer 17 Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer 18 Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer 19 Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer 20 Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer 21 All Rights Reserved. 22 23 The LZO library is free software; you can redistribute it and/or 24 modify it under the terms of the GNU General Public License as 25 published by the Free Software Foundation; either version 2 of 26 the License, or (at your option) any later version. 27 28 The LZO library is distributed in the hope that it will be useful, 29 but WITHOUT ANY WARRANTY; without even the implied warranty of 30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 31 GNU General Public License for more details. 32 33 You should have received a copy of the GNU General Public License 34 along with the LZO library; see the file COPYING. 35 If not, write to the Free Software Foundation, Inc., 36 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 37 38 Markus F.X.J. Oberhumer 39 <markus@oberhumer.com> 40 http://www.oberhumer.com/opensource/lzo/ 41 */ 42 43 44 45#define COMPRESS_ID 99 46 47#define DDBITS 3 48#define CLEVEL 9 49 50 51/*********************************************************************** 52// 53************************************************************************/ 54 55#define LZO_NEED_DICT_H 1 56#include "config1.h" 57 58 59/*********************************************************************** 60// compression internal entry point. 61************************************************************************/ 62 63static int 64_lzo1_do_compress ( const lzo_bytep in, lzo_uint in_len, 65 lzo_bytep out, lzo_uintp out_len, 66 lzo_voidp wrkmem, 67 lzo_compress_t func ) 68{ 69 int r; 70 71 /* don't try to compress a block that's too short */ 72 if (in_len == 0) 73 { 74 *out_len = 0; 75 r = LZO_E_OK; 76 } 77 else if (in_len <= MIN_LOOKAHEAD + 1) 78 { 79#if defined(LZO_RETURN_IF_NOT_COMPRESSIBLE) 80 *out_len = 0; 81 r = LZO_E_NOT_COMPRESSIBLE; 82#else 83 *out_len = pd(STORE_RUN(out,in,in_len), out); 84 r = (*out_len > in_len) ? LZO_E_OK : LZO_E_ERROR; 85#endif 86 } 87 else 88 r = func(in,in_len,out,out_len,wrkmem); 89 90 return r; 91} 92 93 94/*********************************************************************** 95// 96************************************************************************/ 97 98#if !defined(COMPRESS_ID) 99#define COMPRESS_ID _LZO_ECONCAT2(DD_BITS,CLEVEL) 100#endif 101 102 103#define LZO_CODE_MATCH_INCLUDE_FILE "lzo1_cm.ch" 104#include "lzo1b_c.ch" 105 106 107/*********************************************************************** 108// 109************************************************************************/ 110 111#define LZO_COMPRESS \ 112 LZO_CPP_ECONCAT3(lzo1_,COMPRESS_ID,_compress) 113 114#define LZO_COMPRESS_FUNC \ 115 LZO_CPP_ECONCAT3(_lzo1_,COMPRESS_ID,_compress_func) 116 117 118/*********************************************************************** 119// 120************************************************************************/ 121 122LZO_PUBLIC(int) 123LZO_COMPRESS ( const lzo_bytep in, lzo_uint in_len, 124 lzo_bytep out, lzo_uintp out_len, 125 lzo_voidp wrkmem ) 126{ 127 return _lzo1_do_compress(in,in_len,out,out_len,wrkmem,do_compress); 128} 129 130 131/* 132vi:ts=4:et 133*/ 134