/* stats1b.h -- statistics for the the LZO library

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

   Copyright (C) 1996-2014 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 library and is subject

   to change.

 */

#ifndef __LZO_STATS1B_H

#define __LZO_STATS1B_H 1

#ifdef __cplusplus

extern "C" {

#endif

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

// Collect statistical information when compressing.

// Useful for finetuning the compression algorithm.

// Examine the symbol 'lzo1b_stats' with a debugger.

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

#if (LZO_COLLECT_STATS)

#  define LZO_STATS(expr)   expr

#else

#  define LZO_STATS(expr)   ((void) 0)

#endif

#if (LZO_COLLECT_STATS)

typedef struct

{

/* algorithm configuration */

    unsigned r_bits;

    unsigned m3o_bits;

    unsigned dd_bits;

    unsigned clevel;

/* internal configuration */

    unsigned d_bits;

    long min_lookahead;

    long max_lookbehind;

    const char *compress_id;

/* counts */

    long lit_runs;

    long r0short_runs;

    long r0fast_runs;

    long r0long_runs;

    long m1_matches;

    long m2_matches;

    long m3_matches;

    long m4_matches;

    long r1_matches;

/* */

    long lit_run[R0MIN];

    long m2_match[M2_MAX_LEN + 1];

    long m3_match[M3_MAX_LEN + 1];

#if (M3O_BITS < 8)

    long lit_runs_after_m3_match;

    long lit_run_after_m3_match[LZO_SIZE(8-M3O_BITS)];

#endif

/* */

    long matches;

    long match_bytes;

    long literals;

    long literal_overhead;

    long literal_bytes;

    double literal_overhead_percent;

/* */

    long unused_dict_entries;

    double unused_dict_entries_percent;

/* */

    long in_len;

    long out_len;

}

lzo1b_stats_t;

void _lzo1b_stats_init(lzo1b_stats_t *lzo_stats);

void _lzo1b_stats_calc(lzo1b_stats_t *lzo_stats);

extern lzo1b_stats_t * const lzo1b_stats;

#define lzo_stats_t     lzo1b_stats_t

#define lzo_stats       lzo1b_stats

#endif

#ifdef __cplusplus

} /* extern "C" */

#endif

#endif /* already included */

/*

vi:ts=4:et

*/