* Copyright (c) 2024 Huawei Device Co., Ltd.
* 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.
*/
#include "string_utils.h"
namespace OHOS {
namespace HDI {
namespace Location {
static constexpr uint8_t HEX_OFFSET = 4;
static constexpr uint8_t STEP_2BIT = 2;
StringUtils::StringUtils() {}
StringUtils::~StringUtils() {}
uint16_t StringUtils::HexCharToInt(char c)
{
const uint8_t decimal = 10;
if (c >= '0' && c <= '9') {
return (c - '0');
}
if (c >= 'A' && c <= 'F') {
return (c - 'A' + decimal);
}
if (c >= 'a' && c <= 'f') {
return (c - 'a' + decimal);
}
return 0;
}
std::vector<uint8_t> StringUtils::HexToByteVector(const std::string &str)
{
std::vector<uint8_t> ret;
int sz = static_cast<int>(str.length());
if (sz <= 0) {
return ret;
}
for (int i = 0; i < (sz - 1); i += STEP_2BIT) {
auto temp = static_cast<uint8_t>((HexCharToInt(str.at(i)) << HEX_OFFSET) | HexCharToInt(str.at(i + 1)));
ret.push_back(temp);
}
return ret;
}
}
}
}
