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/* config2a.h -- configuration for the LZO2A 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/
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the library and is subject
to change.
*/
#ifndef __LZO_CONFIG2A_H
#define __LZO_CONFIG2A_H 1
#include "lzo_conf.h"
#include "lzo/lzo2a.h"
/***********************************************************************
// algorithm configuration
************************************************************************/
/* dictionary depth (0 - 6) - this only affects the compressor.
* 0 is fastest, 6 is best compression ratio */
#if !defined(DDBITS)
# define DDBITS 0
#endif
/* compression level (1 - 9) - this only affects the compressor.
* 1 is fastest, 9 is best compression ratio */
#if !defined(CLEVEL)
# define CLEVEL 1 /* fastest by default */
#endif
/* check configuration */
#if (DDBITS < 0 || DDBITS > 6)
# error "invalid DDBITS"
#endif
#if (CLEVEL < 1 || CLEVEL > 9)
# error "invalid CLEVEL"
#endif
/***********************************************************************
// internal configuration
************************************************************************/
#if 1
#define SWD_N 8191 /* size of ring buffer */
#else
#define SWD_N 16383 /* size of ring buffer */
#endif
#define M1_MIN_LEN 2
#define M1_MAX_LEN 5
#define M2_MIN_LEN 3
#define M3_MIN_LEN 3
/* add a special code so that the decompressor can detect the
* end of the compressed data block (overhead is 3 bytes per block) */
#define LZO_EOF_CODE 1
#undef LZO_DETERMINISTIC
/***********************************************************************
// algorithm internal configuration
************************************************************************/
/* choose the hashing strategy */
#ifndef LZO_HASH
#define LZO_HASH LZO_HASH_LZO_INCREMENTAL_A
#endif
/* config */
#define DD_BITS DDBITS
#ifndef D_BITS
#define D_BITS 14
#endif
/***********************************************************************
// optimization and debugging
************************************************************************/
/* Collect statistics */
#if 0 && !defined(LZO_COLLECT_STATS)
# define LZO_COLLECT_STATS 1
#endif
/***********************************************************************
//
************************************************************************/
/* get bits */
#define _NEEDBITS \
{ _NEEDBYTE; b |= ((lzo_uint32) _NEXTBYTE) << k; k += 8; assert(k <= 32); }
#define NEEDBITS(j) { assert((j) < 8); if (k < (j)) _NEEDBITS }
/* set bits */
#define SETBITS(j,x) { b |= (x) << k; k += (j); assert(k <= 32); }
/* access bits */
#define MASKBITS(j) (b & ((((lzo_uint32)1 << (j)) - 1)))
/* drop bits */
#define DUMPBITS(j) { assert(k >= j); b >>= (j); k -= (j); }
#endif /* already included */
/*
vi:ts=4:et
*/
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