From b074e80e192a4ef8b6b9ef540c1185f1f7154dbe Mon Sep 17 00:00:00 2001
From: Thomas Doerfler <Thomas.Doerfler@embedded-brains.de>
Date: Tue, 5 May 2009 12:50:43 +0000
Subject: Added functions to translate integers to/from byte streams.

---
 cpukit/include/rtems/endian.h | 132 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)

diff --git a/cpukit/include/rtems/endian.h b/cpukit/include/rtems/endian.h
index 678b8bad3b..1321d244c2 100644
--- a/cpukit/include/rtems/endian.h
+++ b/cpukit/include/rtems/endian.h
@@ -89,4 +89,136 @@ static inline uint16_t htons( uint16_t _x )
 #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 */
-- 
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