lzo-2.03/src/stats1a.h

/* stats1a.h -- statistics for the the LZO1A algorithm

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

   Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1996 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 LZO package and is subject
   to change.
 */


#ifndef __LZO_STATS1A_H
#define __LZO_STATS1A_H

#ifdef __cplusplus
extern "C" {
#endif



/***********************************************************************
// collect statistical information when compressing
// used for finetuning, view with a debugger
************************************************************************/

#if defined(LZO_COLLECT_STATS)
#  define LZO_STATS(expr)   expr
#else
#  define LZO_STATS(expr)   ((void) 0)
#endif


/***********************************************************************
//
************************************************************************/

typedef struct {

/* configuration */
    unsigned rbits;
    unsigned clevel;

/* internal configuration */
    unsigned dbits;
    unsigned lbits;

/* constants */
    unsigned min_match_short;
    unsigned max_match_short;
    unsigned min_match_long;
    unsigned max_match_long;
    unsigned min_offset;
    unsigned max_offset;
    unsigned r0min;
    unsigned r0fast;
    unsigned r0max;

/* counts */
    long short_matches;
    long long_matches;
    long r1_matches;
    long lit_runs;
    long lit_runs_after_long_match;
    long r0short_runs;
    long r0fast_runs;
    long r0long_runs;

/* */
    long lit_run[RSIZE];
    long lit_run_after_long_match[RSIZE];
    long short_match[MAX_MATCH_SHORT + 1];
    long long_match[MAX_MATCH_LONG + 1];
    long marker[256];

/* these could prove useful for further optimizations */
    long short_match_offset_osize[MAX_MATCH_SHORT + 1];
    long short_match_offset_256[MAX_MATCH_SHORT + 1];
    long short_match_offset_1024[MAX_MATCH_SHORT + 1];
    long matches_out_of_range;
    long matches_out_of_range_2;
    long matches_out_of_range_4;
    long match_out_of_range[MAX_MATCH_SHORT + 1];

/* */
    long in_len;
    long out_len;
}
lzo1a_stats_t;

extern lzo1a_stats_t *lzo1a_stats;



#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* already included */

/*
vi:ts=4:et
*/