Initial import

1 files changed, 270 insertions, 0 deletions

diff --git a/lzo/src/lzo1b_c.ch b/lzo/src/lzo1b_c.ch
new file mode 100644
index 00000000..67ef4ff3
--- /dev/null
+++ b/lzo/src/lzo1b_c.ch
@@ -0,0 +1,270 @@
+/* lzo1b_c.ch -- implementation of the LZO1B compression 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/
+ */
+
+
+
+/***********************************************************************
+//
+************************************************************************/
+
+#if !defined(LZO_HAVE_R1) && !defined(LZO_NO_R1)
+#  define LZO_HAVE_R1
+#endif
+
+#if !defined(LZO_HAVE_M3) && !defined(LZO_NO_M3)
+#  if (M3O_BITS < 8)
+#    define LZO_HAVE_M3
+#  endif
+#endif
+
+
+#define MI
+#define SI      MI
+#if (DD_BITS > 0)
+#define DI      ++ii; DVAL_NEXT(dv,ii); UPDATE_D(dict,drun,dv,ii,in); MI
+#define XI      assert(ii < ip); ii = ip; DVAL_FIRST(dv,(ip));
+#else
+#define DI      ++ii; DINDEX1(dindex,ii); UPDATE_I(dict,0,dindex,ii,in); MI
+#define XI      assert(ii < ip); ii = ip;
+#endif
+
+
+/***********************************************************************
+// compress a block of data.
+//
+// I really apologize for this spaghetti code.
+************************************************************************/
+
+LZO_PRIVATE(int)
+do_compress    ( const lzo_bytep in , lzo_uint  in_len,
+                       lzo_bytep out, lzo_uintp out_len,
+                       lzo_voidp wrkmem )
+{
+    register const lzo_bytep ip;
+#if (DD_BITS > 0)
+#if defined(__LZO_HASH_INCREMENTAL)
+    lzo_xint dv;
+#endif
+    unsigned drun = 0;
+#endif
+    lzo_bytep op;
+    const lzo_bytep const in_end = in + in_len;
+    const lzo_bytep const ip_end = in + in_len - MIN_LOOKAHEAD;
+    const lzo_bytep ii;
+#if defined(LZO_HAVE_R1)
+    const lzo_bytep r1 = ip_end;    /* pointer for R1 match (none yet) */
+#endif
+#if defined(LZO_HAVE_M3)
+    lzo_bytep m3 = out + 1;         /* pointer after last m3/m4 match */
+#endif
+
+    lzo_dict_p const dict = (lzo_dict_p) wrkmem;
+
+
+#if defined(LZO_COLLECT_STATS)
+    lzo_stats->r_bits   = R_BITS;
+    lzo_stats->m3o_bits = M3O_BITS;
+    lzo_stats->dd_bits  = DD_BITS;
+    lzo_stats->clevel   = CLEVEL;
+    lzo_stats->d_bits   = D_BITS;
+    lzo_stats->min_lookahead  = MIN_LOOKAHEAD;
+    lzo_stats->max_lookbehind = MAX_LOOKBEHIND;
+    lzo_stats->compress_id    = LZO_CPP_MACRO_EXPAND(COMPRESS_ID);
+#endif
+
+    /* init dictionary */
+#if defined(LZO_DETERMINISTIC)
+    BZERO8_PTR(wrkmem,sizeof(lzo_dict_t),D_SIZE);
+#endif
+
+
+    op = out;
+    ip = in;
+    ii = ip;            /* point to start of current literal run */
+
+
+#if (DD_BITS > 0)
+    DVAL_FIRST(dv,ip);
+    UPDATE_D(dict,drun,dv,ip,in);
+    ip++;
+    DVAL_NEXT(dv,ip);
+#else
+    ip++;
+#endif
+
+    assert(ip < ip_end);
+    for (;;)
+    {
+        const lzo_bytep m_pos;
+#if !defined(NDEBUG)
+        const lzo_bytep m_pos_sav = NULL;
+#endif
+        lzo_uint m_off;
+#if (DD_BITS == 0)
+        lzo_uint dindex;
+#endif
+        lzo_uint m_len;
+
+
+/***********************************************************************
+// search for a match
+************************************************************************/
+
+#if !defined(LZO_SEARCH_MATCH_INCLUDE_FILE)
+#  define LZO_SEARCH_MATCH_INCLUDE_FILE     "lzo1b_sm.ch"
+#endif
+
+#include LZO_SEARCH_MATCH_INCLUDE_FILE
+
+
+#if !defined(LZO_TEST_MATCH_INCLUDE_FILE)
+#  define LZO_TEST_MATCH_INCLUDE_FILE       "lzo1b_tm.ch"
+#endif
+
+#include LZO_TEST_MATCH_INCLUDE_FILE
+
+
+
+/***********************************************************************
+// found a literal
+************************************************************************/
+
+
+    /* a literal */
+literal:
+#if (DD_BITS == 0)
+        UPDATE_I(dict,0,dindex,ip,in);
+#endif
+        if (++ip >= ip_end)
+            break;
+#if (DD_BITS > 0)
+        DVAL_NEXT(dv,ip);
+#endif
+        continue;
+
+
+
+/***********************************************************************
+// found a match
+************************************************************************/
+
+match:
+#if (DD_BITS == 0)
+        UPDATE_I(dict,0,dindex,ip,in);
+#endif
+        /* we have found a match of at least M2_MIN_LEN */
+
+
+#if !defined(LZO_CODE_RUN_INCLUDE_FILE)
+#  define LZO_CODE_RUN_INCLUDE_FILE     "lzo1b_cr.ch"
+#endif
+
+#include LZO_CODE_RUN_INCLUDE_FILE
+
+
+        /* ii now points to the start of the current match */
+        assert(ii == ip);
+
+
+/***********************************************************************
+// code the match
+************************************************************************/
+
+#if !defined(LZO_CODE_MATCH_INCLUDE_FILE)
+#  define LZO_CODE_MATCH_INCLUDE_FILE   "lzo1b_cm.ch"
+#endif
+
+#include LZO_CODE_MATCH_INCLUDE_FILE
+
+
+        /* ii now points to the start of the next literal run */
+        assert(ii == ip);
+
+    }
+
+
+/***********************************************************************
+// end of block
+************************************************************************/
+
+    assert(ip <= in_end);
+
+#if defined(LZO_COLLECT_STATS)
+    {
+        lzo_uint i;
+        const lzo_bytep p;
+
+        for (i = 0; i < D_SIZE; i++)
+        {
+            p = dict[i];
+            if (BOUNDS_CHECKING_OFF_IN_EXPR(p == NULL || p < in || p > in_end))
+                lzo_stats->unused_dict_entries++;
+        }
+        lzo_stats->unused_dict_entries_percent =
+            100.0 * lzo_stats->unused_dict_entries / D_SIZE;
+    }
+#endif
+
+
+#if defined(LZO_RETURN_IF_NOT_COMPRESSIBLE)
+    /* return if op == out to indicate that we
+     * couldn't compress and didn't copy anything.
+     */
+    if (op == out)
+    {
+        *out_len = 0;
+        return LZO_E_NOT_COMPRESSIBLE;
+    }
+#endif
+
+    /* store the final literal run */
+    if (pd(in_end,ii) > 0)
+    {
+        lzo_uint t = pd(in_end,ii);
+        op = STORE_RUN(op,ii,t);
+    }
+
+    *out_len = pd(op, out);
+    return LZO_E_OK;                /* compression went ok */
+}
+
+
+/*
+vi:ts=4:et
+*/