| /* lzo1_99.c -- implementation of the LZO1-99 algorithm |
| |
| This file is part of the LZO real-time data compression library. |
| |
| Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer |
| Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer |
| All Rights Reserved. |
| |
| The LZO library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of |
| the License, or (at your option) any later version. |
| |
| The LZO library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with the LZO library; see the file COPYING. |
| If not, write to the Free Software Foundation, Inc., |
| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| |
| Markus F.X.J. Oberhumer |
| <markus@oberhumer.com> |
| http://www.oberhumer.com/opensource/lzo/ |
| */ |
| |
| |
| |
| #define COMPRESS_ID 99 |
| |
| #define DDBITS 3 |
| #define CLEVEL 9 |
| |
| |
| /*********************************************************************** |
| // |
| ************************************************************************/ |
| |
| #define LZO_NEED_DICT_H |
| #include "config1.h" |
| |
| |
| /*********************************************************************** |
| // compression internal entry point. |
| ************************************************************************/ |
| |
| static int |
| _lzo1_do_compress ( const lzo_bytep in, lzo_uint in_len, |
| lzo_bytep out, lzo_uintp out_len, |
| lzo_voidp wrkmem, |
| lzo_compress_t func ) |
| { |
| int r; |
| |
| /* don't try to compress a block that's too short */ |
| if (in_len <= 0) |
| { |
| *out_len = 0; |
| r = LZO_E_OK; |
| } |
| else if (in_len <= MIN_LOOKAHEAD + 1) |
| { |
| #if defined(LZO_RETURN_IF_NOT_COMPRESSIBLE) |
| *out_len = 0; |
| r = LZO_E_NOT_COMPRESSIBLE; |
| #else |
| *out_len = pd(STORE_RUN(out,in,in_len), out); |
| r = (*out_len > in_len) ? LZO_E_OK : LZO_E_ERROR; |
| #endif |
| } |
| else |
| r = func(in,in_len,out,out_len,wrkmem); |
| |
| return r; |
| } |
| |
| |
| /*********************************************************************** |
| // |
| ************************************************************************/ |
| |
| #if !defined(COMPRESS_ID) |
| #define COMPRESS_ID _LZO_ECONCAT2(DD_BITS,CLEVEL) |
| #endif |
| |
| |
| #define LZO_CODE_MATCH_INCLUDE_FILE "lzo1_cm.ch" |
| #include "lzo1b_c.ch" |
| |
| |
| /*********************************************************************** |
| // |
| ************************************************************************/ |
| |
| #define LZO_COMPRESS \ |
| LZO_CPP_ECONCAT3(lzo1_,COMPRESS_ID,_compress) |
| |
| #define LZO_COMPRESS_FUNC \ |
| LZO_CPP_ECONCAT3(_lzo1_,COMPRESS_ID,_compress_func) |
| |
| |
| /*********************************************************************** |
| // |
| ************************************************************************/ |
| |
| LZO_PUBLIC(int) |
| LZO_COMPRESS ( const lzo_bytep in, lzo_uint in_len, |
| lzo_bytep out, lzo_uintp out_len, |
| lzo_voidp wrkmem ) |
| { |
| return _lzo1_do_compress(in,in_len,out,out_len,wrkmem,do_compress); |
| } |
| |
| |
| /* |
| vi:ts=4:et |
| */ |