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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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 "Utils.h"
#include <string.h>
namespace android {
void zeroMemory(uint8_t* data, size_t size) {
memset(data, 0, size);
}
std::string HexString(const void* bytes, size_t len) {
LOG_ALWAYS_FATAL_IF(len > 0 && bytes == nullptr, "%p %zu", bytes, len);
// b/132916539: Doing this the 'C way', std::setfill triggers ubsan implicit conversion
const uint8_t* bytes8 = static_cast<const uint8_t*>(bytes);
const char chars[] = "0123456789abcdef";
std::string result;
result.resize(len * 2);
for (size_t i = 0; i < len; i++) {
const auto c = bytes8[i];
result[2 * i] = chars[c >> 4];
result[2 * i + 1] = chars[c & 0xf];
}
return result;
}
} // namespace android
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