1 files changed, 43 insertions, 0 deletions
diff --git a/tensorflow/core/lib/core/raw_coding.h b/tensorflow/core/lib/core/raw_coding.h
new file mode 100644
index 0000000000..1fe49b75bb
--- /dev/null
+++ b/tensorflow/core/lib/core/raw_coding.h
@@ -0,0 +1,43 @@
+#ifndef TENSORFLOW_LIB_CORE_RAW_CODING_H_
+#define TENSORFLOW_LIB_CORE_RAW_CODING_H_
+
+#include <string.h>
+#include "tensorflow/core/platform/port.h"
+
+namespace tensorflow {
+namespace core {
+
+// Lower-level versions of Get... that read directly from a character buffer
+// without any bounds checking.
+
+inline uint32 DecodeFixed32(const char* ptr) {
+  if (port::kLittleEndian) {
+    // Load the raw bytes
+    uint32 result;
+    memcpy(&result, ptr, sizeof(result));  // gcc optimizes this to a plain load
+    return result;
+  } else {
+    return ((static_cast<uint32>(static_cast<unsigned char>(ptr[0]))) |
+            (static_cast<uint32>(static_cast<unsigned char>(ptr[1])) << 8) |
+            (static_cast<uint32>(static_cast<unsigned char>(ptr[2])) << 16) |
+            (static_cast<uint32>(static_cast<unsigned char>(ptr[3])) << 24));
+  }
+}
+
+inline uint64 DecodeFixed64(const char* ptr) {
+  if (port::kLittleEndian) {
+    // Load the raw bytes
+    uint64 result;
+    memcpy(&result, ptr, sizeof(result));  // gcc optimizes this to a plain load
+    return result;
+  } else {
+    uint64 lo = DecodeFixed32(ptr);
+    uint64 hi = DecodeFixed32(ptr + 4);
+    return (hi << 32) | lo;
+  }
+}
+
+}  // namespace core
+}  // namespace tensorflow
+
+#endif  // TENSORFLOW_LIB_CORE_RAW_CODING_H_