device/bluetooth: Implemented UriBeacon decoder.

device/bluetooth/uribeacon/uri_encoder.h

+// Copyright 2015 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.
+
+#ifndef DEVICE_BLUETOOTH_URIBEACON_URI_ENCODER_H_
+#define DEVICE_BLUETOOTH_URIBEACON_URI_ENCODER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/strings/string_piece.h"
+
+namespace device {
+
+// The following functions EncodeUriBeaconUri() and DecodeUriBeaconUri() helps
+// encoding/decoding URI with the UriBeacon encoding.
+//
+// Example usage:
+//
+//   std::vector<uint8_t> encoded;
+//   EncodeUriBeaconUri("http://web.mit.edu/", encoded)
+//   // encoded -> {2, 'w', 'e', 'b', '.', 'm', 'i', 't', 2}
+//
+//   const char encodedUri[] = {0, 'u', 'r', 'i', 'b', 'e', 'a', 'c', 'o', 'n',
+//       8};
+//   const std::vector<uint8_t> kEncodedUri(encodedUri, encodedUri +
+//   sizeof(encodedUri));
+//   std::string decoded;
+//   DecodeUriBeaconUri(kEncodedUri, decoded)
+//   // decoded -> "http://uribeacon.org"
+
+// Encodes the input string using URI encoding described in UriBeacon
+// specifications. |input| must be ASCII characters.
+void EncodeUriBeaconUri(const std::string& input, std::vector<uint8_t>& output);
+
+// Decodes the input string using URI encoding described in UriBeacon
+// specifications.
+void DecodeUriBeaconUri(const std::vector<uint8_t>& input, std::string& output);
+
+}  // namespace device
+
+#endif