mirror of https://github.com/libAthena/athena.git
142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
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/* config2a.h -- configuration for the LZO2A algorithm
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This file is part of the LZO real-time data compression library.
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Copyright (C) 1996-2015 Markus Franz Xaver Johannes Oberhumer
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All Rights Reserved.
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The LZO library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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The LZO library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the LZO library; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Markus F.X.J. Oberhumer
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<markus@oberhumer.com>
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http://www.oberhumer.com/opensource/lzo/
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*/
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/* WARNING: this file should *not* be used by applications. It is
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part of the implementation of the library and is subject
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to change.
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*/
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#ifndef __LZO_CONFIG2A_H
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#define __LZO_CONFIG2A_H 1
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#include "lzo_conf.h"
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#include <lzo/lzo2a.h>
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/***********************************************************************
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// algorithm configuration
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************************************************************************/
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/* dictionary depth (0 - 6) - this only affects the compressor.
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* 0 is fastest, 6 is best compression ratio */
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#if !defined(DDBITS)
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# define DDBITS 0
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#endif
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/* compression level (1 - 9) - this only affects the compressor.
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* 1 is fastest, 9 is best compression ratio */
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#if !defined(CLEVEL)
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# define CLEVEL 1 /* fastest by default */
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#endif
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/* check configuration */
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#if (DDBITS < 0 || DDBITS > 6)
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# error "invalid DDBITS"
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#endif
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#if (CLEVEL < 1 || CLEVEL > 9)
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# error "invalid CLEVEL"
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#endif
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/***********************************************************************
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// internal configuration
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************************************************************************/
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#if 1
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#define SWD_N 8191 /* size of ring buffer */
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#else
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#define SWD_N 16383 /* size of ring buffer */
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#endif
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#define M1_MIN_LEN 2
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#define M1_MAX_LEN 5
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#define M2_MIN_LEN 3
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#define M3_MIN_LEN 3
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/* add a special code so that the decompressor can detect the
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* end of the compressed data block (overhead is 3 bytes per block) */
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#define LZO_EOF_CODE 1
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#undef LZO_DETERMINISTIC
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/***********************************************************************
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// algorithm internal configuration
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************************************************************************/
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/* choose the hashing strategy */
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#ifndef LZO_HASH
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#define LZO_HASH LZO_HASH_LZO_INCREMENTAL_A
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#endif
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/* config */
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#define DD_BITS DDBITS
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#ifndef D_BITS
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#define D_BITS 14
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#endif
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/***********************************************************************
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// optimization and debugging
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************************************************************************/
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/* Collect statistics */
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#if 0 && !defined(LZO_COLLECT_STATS)
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# define LZO_COLLECT_STATS 1
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#endif
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/***********************************************************************
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//
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************************************************************************/
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/* get bits */
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#define _NEEDBITS \
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{ _NEEDBYTE; b |= ((lzo_uint32_t) _NEXTBYTE) << k; k += 8; assert(k <= 32); }
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#define NEEDBITS(j) { assert((j) < 8); if (k < (j)) _NEEDBITS }
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/* set bits */
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#define SETBITS(j,x) { b |= ((lzo_uint32_t)(x)) << k; k += (j); assert(k <= 32); }
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/* access bits */
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#define MASKBITS(j) (b & ((((lzo_uint32_t)1 << (j)) - 1)))
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/* drop bits */
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#define DUMPBITS(j) { assert(k >= j); b >>= (j); k -= (j); }
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#endif /* already included */
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/* vim:set ts=4 sw=4 et: */
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