Check-in rlz code to src\rlz from http://code.google.com/p/rlz/.

rlz/lib/string_utils.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// String manipulation functions used in the RLZ library.
+
+#ifndef RLZ_LIB_STRING_UTILS_H_
+#define RLZ_LIB_STRING_UTILS_H_
+
+#include <string>
+
+namespace rlz_lib {
+
+bool IsAscii(char letter);
+
+bool BytesToString(const unsigned char* data,
+                   int data_len,
+                   std::string* string);
+
+bool GetHexValue(char letter, int* value);
+
+int HexStringToInteger(const char* text);
+
+};  // namespace
+
+#endif  // RLZ_LIB_STRING_UTILS_H_