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Diffstat (limited to 'src/stats1b.h')
| -rw-r--r-- | src/stats1b.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/stats1b.h b/src/stats1b.h new file mode 100644 index 0000000..e3ced96 --- /dev/null +++ b/src/stats1b.h @@ -0,0 +1,145 @@ +/* stats1b.h -- statistics for the the LZO library + + This file is part of the LZO real-time data compression library. + + Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer + 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 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 +*/ |