1 files changed, 77 insertions, 0 deletions
diff --git a/sfntly/port/endian.h b/sfntly/port/endian.h
new file mode 100644
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+++ b/sfntly/port/endian.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_ENDIAN_H_
+#define SFNTLY_CPP_SRC_SFNTLY_PORT_ENDIAN_H_
+
+#include "sfntly/port/config.h"
+#include "sfntly/port/type.h"
+
+namespace sfntly {
+
+static inline uint16_t EndianSwap16(uint16_t value) {
+  return (uint16_t)((value >> 8) | (value << 8));
+}
+
+static inline int32_t EndianSwap32(int32_t value) {
+  return (((value & 0x000000ff) << 24) |
+          ((value & 0x0000ff00) <<  8) |
+          ((value & 0x00ff0000) >>  8) |
+          ((value & 0xff000000) >> 24));
+}
+
+static inline uint64_t EndianSwap64(uint64_t value) {
+  return (((value & 0x00000000000000ffLL) << 56) |
+          ((value & 0x000000000000ff00LL) << 40) |
+          ((value & 0x0000000000ff0000LL) << 24) |
+          ((value & 0x00000000ff000000LL) << 8)  |
+          ((value & 0x000000ff00000000LL) >> 8)  |
+          ((value & 0x0000ff0000000000LL) >> 24) |
+          ((value & 0x00ff000000000000LL) >> 40) |
+          ((value & 0xff00000000000000LL) >> 56));
+}
+
+#ifdef SFNTLY_LITTLE_ENDIAN
+  #define ToBE16(n) EndianSwap16(n)
+  #define ToBE32(n) EndianSwap32(n)
+  #define ToBE64(n) EndianSwap64(n)
+  #define ToLE16(n) (n)
+  #define ToLE32(n) (n)
+  #define ToLE64(n) (n)
+  #define FromBE16(n) EndianSwap16(n)
+  #define FromBE32(n) EndianSwap32(n)
+  #define FromBE64(n) EndianSwap64(n)
+  #define FromLE16(n) (n)
+  #define FromLE32(n) (n)
+  #define FromLE64(n) (n)
+#else  // SFNTLY_BIG_ENDIAN
+  #define ToBE16(n) (n)
+  #define ToBE32(n) (n)
+  #define ToBE64(n) (n)
+  #define ToLE16(n) EndianSwap16(n)
+  #define ToLE32(n) EndianSwap32(n)
+  #define ToLE64(n) EndianSwap64(n)
+  #define FromBE16(n) (n)
+  #define FromBE32(n) (n)
+  #define FromBE64(n) (n)
+  #define FromLE16(n) EndianSwap16(n)
+  #define FromLE32(n) EndianSwap32(n)
+  #define FromLE64(n) EndianSwap64(n)
+#endif
+
+}  // namespace sfntly
+
+#endif  // SFNTLY_CPP_SRC_SFNTLY_PORT_ENDIAN_H_