lzo/src/stats1a.h

   1 /* stats1a.h -- statistics for the the LZO1A algorithm
   2
   3    This file is part of the LZO real-time data compression library.
   4
   5    Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
   6    Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
   7    Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
   8    Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
   9    Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
  10    Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
  11    Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
  12    Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
  13    Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
  14    Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
  15    Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
  16    Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
  17    Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
  18    All Rights Reserved.
  19
  20    The LZO library is free software; you can redistribute it and/or
  21    modify it under the terms of the GNU General Public License as
  22    published by the Free Software Foundation; either version 2 of
  23    the License, or (at your option) any later version.
  24
  25    The LZO library is distributed in the hope that it will be useful,
  26    but WITHOUT ANY WARRANTY; without even the implied warranty of
  27    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28    GNU General Public License for more details.
  29
  30    You should have received a copy of the GNU General Public License
  31    along with the LZO library; see the file COPYING.
  32    If not, write to the Free Software Foundation, Inc.,
  33    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  34
  35    Markus F.X.J. Oberhumer
  36    <markus@oberhumer.com>
  37    http://www.oberhumer.com/opensource/lzo/
  38  */
  39
  40
  41 /* WARNING: this file should *not* be used by applications. It is
  42    part of the implementation of the LZO package and is subject
  43    to change.
  44  */
  45
  46
  47 #ifndef __LZO_STATS1A_H
  48 #define __LZO_STATS1A_H
  49
  50 #ifdef __cplusplus
  51 extern "C" {
  52 #endif
  53
  54
  55
  56 /***********************************************************************
  57 // collect statistical information when compressing
  58 // used for finetuning, view with a debugger
  59 ************************************************************************/
  60
  61 #if defined(LZO_COLLECT_STATS)
  62 #  define LZO_STATS(expr)   expr
  63 #else
  64 #  define LZO_STATS(expr)   ((void) 0)
  65 #endif
  66
  67
  68 /***********************************************************************
  69 //
  70 ************************************************************************/
  71
  72 typedef struct {
  73
  74 /* configuration */
  75     unsigned rbits;
  76     unsigned clevel;
  77
  78 /* internal configuration */
  79     unsigned dbits;
  80     unsigned lbits;
  81
  82 /* constants */
  83     unsigned min_match_short;
  84     unsigned max_match_short;
  85     unsigned min_match_long;
  86     unsigned max_match_long;
  87     unsigned min_offset;
  88     unsigned max_offset;
  89     unsigned r0min;
  90     unsigned r0fast;
  91     unsigned r0max;
  92
  93 /* counts */
  94     long short_matches;
  95     long long_matches;
  96     long r1_matches;
  97     long lit_runs;
  98     long lit_runs_after_long_match;
  99     long r0short_runs;
 100     long r0fast_runs;
 101     long r0long_runs;
 102
 103 /* */
 104     long lit_run[RSIZE];
 105     long lit_run_after_long_match[RSIZE];
 106     long short_match[MAX_MATCH_SHORT + 1];
 107     long long_match[MAX_MATCH_LONG + 1];
 108     long marker[256];
 109
 110 /* these could prove useful for further optimizations */
 111     long short_match_offset_osize[MAX_MATCH_SHORT + 1];
 112     long short_match_offset_256[MAX_MATCH_SHORT + 1];
 113     long short_match_offset_1024[MAX_MATCH_SHORT + 1];
 114     long matches_out_of_range;
 115     long matches_out_of_range_2;
 116     long matches_out_of_range_4;
 117     long match_out_of_range[MAX_MATCH_SHORT + 1];
 118
 119 /* */
 120     long in_len;
 121     long out_len;
 122 }
 123 lzo1a_stats_t;
 124
 125 extern lzo1a_stats_t *lzo1a_stats;
 126
 127
 128
 129 #ifdef __cplusplus
 130 } /* extern "C" */
 131 #endif
 132
 133 #endif /* already included */
 134
 135 /*
 136 vi:ts=4:et
 137 */