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Diffstat (limited to 'src/lzo1_99.c')
| -rw-r--r-- | src/lzo1_99.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/lzo1_99.c b/src/lzo1_99.c new file mode 100644 index 0000000..b23695d --- /dev/null +++ b/src/lzo1_99.c @@ -0,0 +1,133 @@ +/* lzo1_99.c -- implementation of the LZO1-99 algorithm + + This file is part of the LZO real-time data compression library. + + Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer + 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 1 +#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 +*/ |