1 files changed, 224 insertions, 0 deletions
diff --git a/cpukit/include/rtems/endian.h b/cpukit/include/rtems/endian.h
new file mode 100644
index 0000000000..1321d244c2
--- /dev/null
+++ b/cpukit/include/rtems/endian.h
@@ -0,0 +1,224 @@
+/*
+ *  $Id$
+ */
+
+#ifndef _RTEMS_ENDIAN_H
+#define _RTEMS_ENDIAN_H
+
+#include <rtems.h>
+
+/*
+ * BSD-style endian declaration
+ */
+#define BIG_ENDIAN	4321
+#define LITTLE_ENDIAN	1234
+
+#ifndef BYTE_ORDER
+#if CPU_BIG_ENDIAN
+# define BYTE_ORDER BIG_ENDIAN
+#elif CPU_LITTLE_ENDIAN
+# define BYTE_ORDER LITTLE_ENDIAN
+#else
+# error "Can't decide which end is which!"
+#endif
+#endif
+
+#if ( CPU_BIG_ENDIAN == TRUE )
+
+/*
+ *  Very simply on big endian CPUs
+ */
+
+static inline uint32_t ntohl( uint32_t _x )
+{
+  return _x;
+}
+
+static inline uint16_t ntohs( uint16_t _x )
+{
+  return _x;
+}
+
+static inline uint32_t htonl( uint32_t _x )
+{
+  return _x;
+}
+
+static inline uint16_t htons( uint16_t _x )
+{
+  return _x;
+}
+
+#define NTOHS(x)
+#define HTONS(x)
+#define NTOHL(x)
+#define HTONL(x)
+
+#elif ( CPU_LITTLE_ENDIAN == TRUE )
+
+/*
+ *  A little more complicated on little endian CPUs
+ */
+
+static inline uint32_t ntohl( uint32_t _x )
+{
+  return CPU_swap_u32(_x);
+}
+
+static inline uint16_t ntohs( uint16_t _x )
+{
+  return CPU_swap_u16(_x);
+}
+
+static inline uint32_t htonl( uint32_t _x )
+{
+  return CPU_swap_u32(_x);
+}
+
+static inline uint16_t htons( uint16_t _x )
+{
+  return CPU_swap_u16(_x);
+}
+
+#define NTOHS(x) (x) = ntohs(x)
+#define HTONS(x) (x) = htons(x)
+#define NTOHL(x) (x) = ntohl(x)
+#define HTONL(x) (x) = htonl(x)
+
+#else
+#error "Unknown endian-ness for this cpu"
+#endif
+
+static inline uint16_t rtems_uint16_from_little_endian( const uint8_t *data)
+{
+  uint16_t value = 0;
+  ssize_t i = 0;
+
+  for (i = 1; i >= 0; --i) {
+    value = (uint16_t) ((value << 8) + data [i]);
+  }
+
+  return value;
+}
+
+static inline uint32_t rtems_uint32_from_little_endian( const uint8_t *data)
+{
+  uint32_t value = 0;
+  ssize_t i = 0;
+
+  for (i = 3; i >= 0; --i) {
+    value = (value << 8) + data [i];
+  }
+
+  return value;
+}
+
+static inline uint64_t rtems_uint64_from_little_endian( const uint8_t *data)
+{
+  uint64_t value = 0;
+  ssize_t i = 0;
+
+  for (i = 7; i >= 0; --i) {
+    value = (value << 8) + (uint64_t) data [i];
+  }
+
+  return value;
+}
+
+static inline uint16_t rtems_uint16_from_big_endian( const uint8_t *data)
+{
+  uint16_t value = 0;
+  size_t i = 0;
+
+  for (i = 0; i < 2; ++i) {
+    value = (uint16_t) ((value << 8) + data [i]);
+  }
+
+  return value;
+}
+
+static inline uint32_t rtems_uint32_from_big_endian( const uint8_t *data)
+{
+  uint32_t value = 0;
+  size_t i = 0;
+
+  for (i = 0; i < 4; ++i) {
+    value = (value << 8) + (uint32_t) data [i];
+  }
+
+  return value;
+}
+
+static inline uint64_t rtems_uint64_from_big_endian( const uint8_t *data)
+{
+  uint64_t value = 0;
+  size_t i = 0;
+
+  for (i = 0; i < 8; ++i) {
+    value = (value << 8) + (uint64_t) data [i];
+  }
+
+  return value;
+}
+
+static inline void rtems_uint16_to_little_endian( uint16_t value, uint8_t *data)
+{
+  size_t i = 0;
+
+  for (i = 0; i < 2; ++i) {
+    data [i] = (uint8_t) value;
+    value >>= 8;
+  }
+}
+
+static inline void rtems_uint32_to_little_endian( uint32_t value, uint8_t *data)
+{
+  size_t i = 0;
+
+  for (i = 0; i < 4; ++i) {
+    data [i] = (uint8_t) value;
+    value >>= 8;
+  }
+}
+
+static inline void rtems_uint64_to_little_endian( uint64_t value, uint8_t *data)
+{
+  size_t i = 0;
+
+  for (i = 0; i < 8; ++i) {
+    data [i] = (uint8_t) value;
+    value >>= 8;
+  }
+}
+
+static inline void rtems_uint16_to_big_endian( uint16_t value, uint8_t *data)
+{
+  ssize_t i = 0;
+
+  for (i = 1; i >= 0; --i) {
+    data [i] = (uint8_t) value;
+    value >>= 8;
+  }
+}
+
+static inline void rtems_uint32_to_big_endian( uint32_t value, uint8_t *data)
+{
+  ssize_t i = 0;
+
+  for (i = 3; i >= 0; --i) {
+    data [i] = (uint8_t) value;
+    value >>= 8;
+  }
+}
+
+static inline void rtems_uint64_to_big_endian( uint64_t value, uint8_t *data)
+{
+  ssize_t i = 0;
+
+  for (i = 7; i >= 0; --i) {
+    data [i] = (uint8_t) value;
+    value >>= 8;
+  }
+}
+
+#endif /* _RTEMS_ENDIAN_H */