move bswap functions to static inline in byteswap.h

1 files changed, 25 insertions, 0 deletions

diff --git a/include/byteswap.h b/include/byteswap.h
index e69de29b..4ebd90e3 100644
--- a/include/byteswap.h
+++ b/include/byteswap.h
@@ -0,0 +1,25 @@
+#ifndef _BYTESWAP_H
+#define _BYTESWAP_H
+
+#include <stdint.h>
+
+static inline uint16_t __bswap_16(uint16_t __x)
+{
+	return __x<<8 | __x>>8;
+}
+
+static inline uint32_t __bswap_32(uint32_t __x)
+{
+	return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
+}
+
+static inline uint64_t __bswap_64(uint64_t __x)
+{
+	return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
+}
+
+#define bswap_16(x) __bswap_16(x)
+#define bswap_32(x) __bswap_32(x)
+#define bswap_64(x) __bswap_64(x)
+
+#endif