X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Flzx-common.c;h=a7bca000803447c6e24f32c6f3710b76c2e8b799;hb=b0a6bbcba9dc23f4722827cb13fb0efff5e2799d;hp=8afe2abe0843e879aa9e13bdf4162ed727b2233a;hpb=885632f08c75c1d7bb5d25436231c78f6ad7e0c0;p=wimlib

diff --git a/src/lzx-common.c b/src/lzx-common.c
index 8afe2abe..a7bca000 100644
--- a/src/lzx-common.c
+++ b/src/lzx-common.c
@@ -1,5 +1,33 @@
-#include "lzx.h"
+/*
+ * lzx-common.c - Common data for LZX compression and decompression.
+ */
+
+/*
+ * Copyright (C) 2012, 2013 Eric Biggers
+ *
+ * This file is part of wimlib, a library for working with WIM files.
+ *
+ * wimlib 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 3 of the License, or (at your option)
+ * any later version.
+ *
+ * wimlib 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 wimlib; if not, see http://www.gnu.org/licenses/.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "wimlib/lzx.h"
 
+#ifdef USE_LZX_EXTRA_BITS_ARRAY
 /* LZX uses what it calls 'position slots' to represent match offsets.
  * What this means is that a small 'position slot' number and a small
  * offset from that slot are encoded instead of one large offset for
@@ -7,18 +35,32 @@
  * - lzx_position_base is an index to the position slot bases
  * - lzx_extra_bits states how many bits of offset-from-base data is needed.
  */
-const u8 lzx_extra_bits[51] = {
-	0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
-	7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14,
-	15, 15, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
-	17, 17, 17
+const u8 lzx_extra_bits[LZX_NUM_POSITION_SLOTS] = {
+	0 , 0 , 0 , 0 , 1 ,
+	1 , 2 , 2 , 3 , 3 ,
+	4 , 4 , 5 , 5 , 6 ,
+	6 , 7 , 7 , 8 , 8 ,
+	9 , 9 , 10, 10, 11,
+	11, 12, 12, 13, 13,
+	/*14, 14, 15, 15, 16,*/
+	/*16, 17, 17, 17, 17,*/
+	/*17, 17, 17, 17, 17,*/
+	/*17, 17, 17, 17, 17,*/
+	/*17*/
 };
+#endif
 
-const u32 lzx_position_base[51] = {
-	0, 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384,
-	512, 768, 1024, 1536, 2048, 3072, 4096, 6144, 8192, 12288, 16384, 24576,
-	32768, 49152, 65536, 98304, 131072, 196608, 262144, 393216, 524288,
-	655360, 786432, 917504, 1048576, 1179648, 1310720, 1441792, 1572864,
-	1703936, 1835008, 1966080, 2097152
+const u32 lzx_position_base[LZX_NUM_POSITION_SLOTS] = {
+	0      , 1      , 2      , 3      , 4      ,
+	6      , 8      , 12     , 16     , 24     ,
+	32     , 48     , 64     , 96     , 128    ,
+	192    , 256    , 384    , 512    , 768    ,
+	1024   , 1536   , 2048   , 3072   , 4096   ,
+	6144   , 8192   , 12288  , 16384  , 24576  ,
+	/*32768  , 49152  , 65536  , 98304  , 131072 ,*/
+	/*196608 , 262144 , 393216 , 524288 , 655360 ,*/
+	/*786432 , 917504 , 1048576, 1179648, 1310720,*/
+	/*1441792, 1572864, 1703936, 1835008, 1966080,*/
+	/*2097152*/
 };