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// 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.
#include "device/bluetooth/bluetooth_utils.h"
#include <vector>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/string_util.h"
namespace {
static const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb";
static const char* kCommonUuidPrefix = "0000";
static const int kUuidSize = 36;
} // namespace
namespace device {
namespace bluetooth_utils {
std::string CanonicalUuid(std::string uuid) {
if (uuid.empty())
return std::string();
if (uuid.size() < 11 && uuid.find("0x") == 0)
uuid = uuid.substr(2);
if (!(uuid.size() == 4 || uuid.size() == 8 || uuid.size() == 36))
return std::string();
if (uuid.size() == 4 || uuid.size() == 8) {
for (size_t i = 0; i < uuid.size(); ++i) {
if (!IsHexDigit(uuid[i]))
return std::string();
}
if (uuid.size() == 4)
return kCommonUuidPrefix + uuid + kCommonUuidPostfix;
return uuid + kCommonUuidPostfix;
}
std::string uuid_result(uuid);
for (int i = 0; i < kUuidSize; ++i) {
if (i == 8 || i == 13 || i == 18 || i == 23) {
if (uuid[i] != '-')
return std::string();
} else {
if (!IsHexDigit(uuid[i]))
return std::string();
uuid_result[i] = tolower(uuid[i]);
}
}
return uuid_result;
}
} // namespace bluetooth_utils
} // namespace device
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