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authorH.J. Lu <hjl.tools@gmail.com>2012-04-06 15:13:09 -0700
committerH.J. Lu <hjl.tools@gmail.com>2012-04-06 15:14:52 -0700
commitf8887d0a5feda97244613135822b0439addc2b1f (patch)
tree21b9a587a4fc42960d4b48e4a49c2f8250378493 /bits
parentd4d1707fd64567d464de98893f52999cd40a51cd (diff)
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Add byteswap-16.h for __bswap_16
Diffstat (limited to 'bits')
-rw-r--r--bits/byteswap-16.h33
-rw-r--r--bits/byteswap.h13
2 files changed, 35 insertions, 11 deletions
diff --git a/bits/byteswap-16.h b/bits/byteswap-16.h
new file mode 100644
index 0000000..078dd0e
--- /dev/null
+++ b/bits/byteswap-16.h
@@ -0,0 +1,33 @@
+/* Macros to swap the order of bytes in 16-bit integer values.
+ Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_BYTESWAP_H
+# error "Never use <bits/byteswap-16.h> directly; include <byteswap.h> instead."
+#endif
+
+#ifdef __GNUC__
+# define __bswap_16(x) \
+ (__extension__ \
+ ({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
+#else
+static __inline unsigned short int
+__bswap_16 (unsigned short int __bsx)
+{
+ return __bswap_constant_16 (__bsx);
+}
+#endif
diff --git a/bits/byteswap.h b/bits/byteswap.h
index 31e9a16..6e3ed3f 100644
--- a/bits/byteswap.h
+++ b/bits/byteswap.h
@@ -27,17 +27,8 @@
#define __bswap_constant_16(x) \
((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
-#ifdef __GNUC__
-# define __bswap_16(x) \
- (__extension__ \
- ({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
-#else
-static __inline unsigned short int
-__bswap_16 (unsigned short int __bsx)
-{
- return __bswap_constant_16 (__bsx);
-}
-#endif
+/* Get __bswap_16. */
+#include <bits/byteswap-16.h>
/* Swap bytes in 32 bit value. */
#define __bswap_constant_32(x) \