/* 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 */