/* config2a.h -- configuration for the LZO2A algorithm

   This file is part of the LZO real-time data compression library.

   Copyright (C) 1996-2014 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_t) _NEXTBYTE) << k; k += 8; assert(k <= 32); }

#define NEEDBITS(j)     { assert((j) < 8); if (k < (j)) _NEEDBITS }

/* set bits */

#define SETBITS(j,x)    { b |= ((lzo_uint32_t)(x)) << k; k += (j); assert(k <= 32); }

/* access bits */

#define MASKBITS(j)     (b & ((((lzo_uint32_t)1 << (j)) - 1)))

/* drop bits */

#define DUMPBITS(j)     { assert(k >= j); b >>= (j); k -= (j); }

#endif /* already included */

/*

vi:ts=4:et

*/