release/src/router/lzo/src/config1c.h

   1 /* config1c.h -- configuration for the LZO1C algorithm
   2
   3    This file is part of the LZO real-time data compression library.
   4
   5    Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer
   6    Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer
   7    Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer
   8    Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
   9    Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
  10    Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
  11    Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
  12    Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
  13    Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
  14    Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
  15    Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
  16    Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
  17    Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
  18    Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
  19    Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
  20    Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
  21    All Rights Reserved.
  22
  23    The LZO library is free software; you can redistribute it and/or
  24    modify it under the terms of the GNU General Public License as
  25    published by the Free Software Foundation; either version 2 of
  26    the License, or (at your option) any later version.
  27
  28    The LZO library is distributed in the hope that it will be useful,
  29    but WITHOUT ANY WARRANTY; without even the implied warranty of
  30    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31    GNU General Public License for more details.
  32
  33    You should have received a copy of the GNU General Public License
  34    along with the LZO library; see the file COPYING.
  35    If not, write to the Free Software Foundation, Inc.,
  36    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  37
  38    Markus F.X.J. Oberhumer
  39    <markus@oberhumer.com>
  40    http://www.oberhumer.com/opensource/lzo/
  41  */
  42
  43
  44 /* WARNING: this file should *not* be used by applications. It is
  45    part of the implementation of the library and is subject
  46    to change.
  47  */
  48
  49
  50 #ifndef __LZO_CONFIG1C_H
  51 #define __LZO_CONFIG1C_H 1
  52
  53 #include "lzo_conf.h"
  54 #include "lzo/lzo1c.h"
  55
  56
  57 /***********************************************************************
  58 // algorithm configuration
  59 ************************************************************************/
  60
  61 /* run bits (4 - 5) - the compressor and the decompressor
  62  * must use the same value. */
  63 #if !defined(RBITS)
  64 #  define RBITS     5
  65 #endif
  66
  67 /* dictionary depth (0 - 6) - this only affects the compressor.
  68  * 0 is fastest, 6 is best compression ratio */
  69 #if !defined(DDBITS)
  70 #  define DDBITS    0
  71 #endif
  72
  73 /* compression level (1 - 9) - this only affects the compressor.
  74  * 1 is fastest, 9 is best compression ratio */
  75 #if !defined(CLEVEL)
  76 #  define CLEVEL    1           /* fastest by default */
  77 #endif
  78
  79
  80 /* check configuration */
  81 #if (RBITS < 4 || RBITS > 5)
  82 #  error "invalid RBITS"
  83 #endif
  84 #if (DDBITS < 0 || DDBITS > 6)
  85 #  error "invalid DDBITS"
  86 #endif
  87 #if (CLEVEL < 1 || CLEVEL > 9)
  88 #  error "invalid CLEVEL"
  89 #endif
  90
  91
  92 /***********************************************************************
  93 // internal configuration
  94 ************************************************************************/
  95
  96 /* add a special code so that the decompressor can detect the
  97  * end of the compressed data block (overhead is 3 bytes per block) */
  98 #define LZO_EOF_CODE 1
  99
 100
 101 /***********************************************************************
 102 // algorithm internal configuration
 103 ************************************************************************/
 104
 105 /* choose the hashing strategy */
 106 #ifndef LZO_HASH
 107 #define LZO_HASH        LZO_HASH_LZO_INCREMENTAL_A
 108 #endif
 109
 110 /* config */
 111 #define R_BITS          RBITS
 112 #define DD_BITS         DDBITS
 113 #ifndef D_BITS
 114 #define D_BITS          14
 115 #endif
 116
 117
 118 /***********************************************************************
 119 // optimization and debugging
 120 ************************************************************************/
 121
 122 /* Collect statistics */
 123 #if 0 && !defined(LZO_COLLECT_STATS)
 124 #  define LZO_COLLECT_STATS 1
 125 #endif
 126
 127
 128 /***********************************************************************
 129 //
 130 ************************************************************************/
 131
 132 /* good parameters when using a blocksize of 8kB */
 133 #define M3O_BITS        6
 134 #undef LZO_DETERMINISTIC
 135
 136
 137 #include "lzo1b_de.h"
 138 #include "stats1c.h"
 139
 140 #include "lzo1c_cc.h"
 141
 142
 143 #endif /* already included */
 144
 145 /*
 146 vi:ts=4:et
 147 */
 148