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/* lzo1_99.c -- implementation of the LZO1-99 algorithm
This file is part of the LZO real-time data compression library.
Copyright (C) 1996-2017 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_PP_ECONCAT3(lzo1_,COMPRESS_ID,_compress)
#define LZO_COMPRESS_FUNC \
LZO_PP_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);
}
/* vim:set ts=4 sw=4 et: */
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