X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=include%2Fwimlib%2Fcompiler.h;h=a43bb769fdce9c752e3a75920c6ce48744133579;hb=993d197cac3a09508f2afefe0e2a620d7e43fa1a;hp=533930396e0134e657c80486bf8954f8f87baeb9;hpb=fcafdfda28fd0e84e5f98fa2ae2dcf091e1ccc39;p=wimlib

diff --git a/include/wimlib/compiler.h b/include/wimlib/compiler.h
index 53393039..a43bb769 100644
--- 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
@@ -84,8 +97,19 @@
  * returns will not alias any pointer previously in use by the program.  */
 #define _malloc_attribute	__attribute__((malloc))
 
-/* TODO: _format_attribute is currently ignored.  */
-#define _format_attribute(type, format_str, format_start)
+/* Hint that the annotated function takes a printf()-like format string and
+ * arguments.  This is currently disabled on Windows because MinGW does not
+ * support this attribute on functions taking wide-character strings.  */
+#ifdef __WIN32__
+#  define _format_attribute(type, format_str, format_start)
+#else
+#  define _format_attribute(type, format_str, format_start)	\
+			__attribute__((format(type, format_str, format_start)))
+#endif
+
+/* Hint that the annotated function is intentionally not used.  This might be
+ * the case if the function contains only static assertions.  */
+#define _unused_attribute	__attribute__((unused))
 
 /* Endianness definitions.  Either CPU_IS_BIG_ENDIAN or CPU_IS_LITTLE_ENDIAN is
  * set to 1.  The other is set to 0.  Note that newer gcc supports
@@ -103,12 +127,12 @@
 #endif
 #define CPU_IS_LITTLE_ENDIAN (!CPU_IS_BIG_ENDIAN)
 
-#if defined(__x86_64__) || defined(__i386__)
-#  define UNALIGNED_ACCESS_SPEED 3
-#elif defined(__ARM_FEATURE_UNALIGNED) && (__ARM_FEATURE_UNALIGNED == 1)
-#  define UNALIGNED_ACCESS_SPEED 2
+/* UNALIGNED_ACCESS_IS_FAST should be defined to 1 if unaligned memory accesses
+ * can be performed efficiently on the target platform.  */
+#if defined(__x86_64__) || defined(__i386__) || defined(__ARM_FEATURE_UNALIGNED)
+#  define UNALIGNED_ACCESS_IS_FAST 1
 #else
-#  define UNALIGNED_ACCESS_SPEED 0
+#  define UNALIGNED_ACCESS_IS_FAST 0
 #endif
 
 /* Get the type of the specified expression.  */