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authorEric Andersen <andersen@codepoet.org>2001-08-21 04:24:24 +0000
committerEric Andersen <andersen@codepoet.org>2001-08-21 04:24:24 +0000
commitcdfd2afc68472a09968626073b8f669f6836b3cf (patch)
treee5acf39724d2cdb18886510e01b4fe97485ef25c /include/byteswap.h
parent0d2c8884092a1043e53a417546347eb97fa0099f (diff)
Add byteswap.h, per glibc
Diffstat (limited to 'include/byteswap.h')
-rw-r--r--include/byteswap.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/byteswap.h b/include/byteswap.h
new file mode 100644
index 000000000..b61d4dda8
--- /dev/null
+++ b/include/byteswap.h
@@ -0,0 +1,40 @@
+/* Copyright (C) 1997 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _BYTESWAP_H
+#define _BYTESWAP_H 1
+
+/* Get the machine specific, optimized definitions. */
+#include <bits/byteswap.h>
+
+
+/* The following definitions must all be macros since otherwise some
+ of the possible optimizations are not possible. */
+
+/* Return a value with all bytes in the 16 bit argument swapped. */
+#define bswap_16(x) __bswap_16 (x)
+
+/* Return a value with all bytes in the 32 bit argument swapped. */
+#define bswap_32(x) __bswap_32 (x)
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* Return a value with all bytes in the 64 bit argument swapped. */
+# define bswap_64(x) __bswap_64 (x)
+#endif
+
+#endif /* byteswap.h */