Merge TinyOS 2.1.1 into master.

[tinyos-2.x.git] / support / sdk / c / blip / lib6lowpan / nwbyte.h

diff --git a/support/sdk/c/blip/lib6lowpan/nwbyte.h b/support/sdk/c/blip/lib6lowpan/nwbyte.h
new file mode 100644 (file)
index 0000000..f94b3a5
--- /dev/null
+++ b/support/sdk/c/blip/lib6lowpan/nwbyte.h
@@ -0,0 +1,54 @@
+#ifndef _NWBYTE_H
+#define _NWBYTE_H_
+
+#include "blip-platform.h"
+
+/* define normal network byte-orders routines  */
+#if defined(PC) 
+
+#define ntoh16(X)   ntohs(X)
+#define hton16(X)   htons(X)
+#define ntoh32(X)   ntohl(X)
+#define hton32(X)   htonl(X)
+#else
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+// otherwise have to provide our own 
+
+#define ntoh16(X)   (((((uint16_t)(X)) >> 8) | ((uint16_t)(X) << 8)) & 0xffff)
+#define hton16(X)   (((((uint16_t)(X)) << 8) | ((uint16_t)(X) >> 8)) & 0xffff)
+
+/* this is much more efficient since gcc can insert swpb now.  */
+static inline uint32_t __attribute__((unused))  ntoh32(uint32_t i) {
+  uint16_t lo = (uint16_t)i;
+  uint16_t hi = (uint16_t)(i >> 16);
+  lo = (lo << 8) | (lo >> 8);
+  hi = (hi << 8) | (hi >> 8);
+  return (((uint32_t)lo) << 16) | ((uint32_t)hi);
+}
+
+#define hton32(X) ntoh32(X)
+#define ntohs(X) ntoh16(X)
+#define htons(X) hton16(X)
+#define ntohl(X) ntoh32(X)
+#define htonl(X) hton32(X)
+
+#else 
+#error "No byte-order conversions defined!"
+#endif
+#endif
+
+/* little-endian conversion routines */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define leton16(X)  hton16(X)
+#ifndef htole16
+#define htole16(X)  (X)
+#endif
+
+#else
+//  big-endian byte-order
+#define leton16(X) (((((uint16_t)(X)) << 8) | ((uint16_t)(X) >> 8)) & 0xffff)
+#define htole16(X) (((((uint16_t)(X)) << 8) | ((uint16_t)(X) >> 8)) & 0xffff)
+#endif
+
+#endif