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diff --git a/src/stats1b.h b/src/stats1b.h
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+/* stats1b.h -- statistics for the the LZO library
+
+   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 library and is subject
+   to change.
+ */
+
+
+#ifndef __LZO_STATS1B_H
+#define __LZO_STATS1B_H
+
+#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 defined(LZO_COLLECT_STATS)
+#  define LZO_STATS(expr)   expr
+#else
+#  define LZO_STATS(expr)   ((void) 0)
+#endif
+
+
+#if defined(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
+*/