decompress_common: switch to subtables for Huffman decoding

[wimlib] / include / wimlib / compiler.h

diff --git a/include/wimlib/compiler.h b/include/wimlib/compiler.h
index 43ccc7d49f0fd35d7a6c3fe631bfd0c251a2f6c6..9f53e192fc52796e2837c016a2f20b479e05d1cf 100644 (file)
--- a/include/wimlib/compiler.h
+++ b/include/wimlib/compiler.h
@@ -3,8 +3,21 @@
  *
  * Compiler-specific definitions.  Currently, only GCC and clang are supported.
  *
- * The author dedicates this file to the public domain.
- * You can do whatever you want with this file.
+ * The following copying information applies to this specific source code file:
+ *
+ * Written in 2013-2016 by Eric Biggers <ebiggers3@gmail.com>
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide via the Creative Commons Zero 1.0 Universal Public Domain
+ * Dedication (the "CC0").
+ *
+ * This software 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 CC0 for more details.
+ *
+ * You should have received a copy of the CC0 along with this software; if not
+ * see <http://creativecommons.org/publicdomain/zero/1.0/>.
  */
 
 #ifndef _WIMLIB_COMPILER_H
@@ -179,6 +192,10 @@
 #  define STATIC_ASSERT(expr)  ((void)sizeof(char[1 - 2 * !(expr)]))
 #endif
 
+/* STATIC_ASSERT_ZERO() - verify the truth of an expression at compilation time
+ * and also produce a result of value '0' to be used in constant expressions */
+#define STATIC_ASSERT_ZERO(expr) ((int)sizeof(char[-!(expr)]))
+
 #define CONCAT_IMPL(s1, s2)    s1##s2
 
 /* CONCAT() - concatenate two tokens at preprocessing time.  */