release/src/router/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) 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 LZO package and is subject
  46    to change.
  47  */
  48
  49
  50 #ifndef __LZO_STATS1A_H
  51 #define __LZO_STATS1A_H 1
  52
  53 #ifdef __cplusplus
  54 extern "C" {
  55 #endif
  56
  57
  58
  59 /***********************************************************************
  60 // collect statistical information when compressing
  61 // used for finetuning, view with a debugger
  62 ************************************************************************/
  63
  64 #if (LZO_COLLECT_STATS)
  65 #  define LZO_STATS(expr)   expr
  66 #else
  67 #  define LZO_STATS(expr)   ((void) 0)
  68 #endif
  69
  70
  71 /***********************************************************************
  72 //
  73 ************************************************************************/
  74
  75 typedef struct {
  76
  77 /* configuration */
  78     unsigned rbits;
  79     unsigned clevel;
  80
  81 /* internal configuration */
  82     unsigned dbits;
  83     unsigned lbits;
  84
  85 /* constants */
  86     unsigned min_match_short;
  87     unsigned max_match_short;
  88     unsigned min_match_long;
  89     unsigned max_match_long;
  90     unsigned min_offset;
  91     unsigned max_offset;
  92     unsigned r0min;
  93     unsigned r0fast;
  94     unsigned r0max;
  95
  96 /* counts */
  97     long short_matches;
  98     long long_matches;
  99     long r1_matches;
 100     long lit_runs;
 101     long lit_runs_after_long_match;
 102     long r0short_runs;
 103     long r0fast_runs;
 104     long r0long_runs;
 105
 106 /* */
 107     long lit_run[RSIZE];
 108     long lit_run_after_long_match[RSIZE];
 109     long short_match[MAX_MATCH_SHORT + 1];
 110     long long_match[MAX_MATCH_LONG + 1];
 111     long marker[256];
 112
 113 /* these could prove useful for further optimizations */
 114     long short_match_offset_osize[MAX_MATCH_SHORT + 1];
 115     long short_match_offset_256[MAX_MATCH_SHORT + 1];
 116     long short_match_offset_1024[MAX_MATCH_SHORT + 1];
 117     long matches_out_of_range;
 118     long matches_out_of_range_2;
 119     long matches_out_of_range_4;
 120     long match_out_of_range[MAX_MATCH_SHORT + 1];
 121
 122 /* */
 123     long in_len;
 124     long out_len;
 125 }
 126 lzo1a_stats_t;
 127
 128 extern lzo1a_stats_t *lzo1a_stats;
 129
 130
 131
 132 #ifdef __cplusplus
 133 } /* extern "C" */
 134 #endif
 135
 136 #endif /* already included */
 137
 138 /*
 139 vi:ts=4:et
 140 */