43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "android-base/hex.h"
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#include "android-base/logging.h"
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namespace android {
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namespace base {
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std::string HexString(const void* bytes, size_t len) {
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CHECK(bytes != nullptr || len == 0) << bytes << " " << len;
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// b/132916539: Doing this the 'C way', std::setfill triggers ubsan implicit conversion
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const uint8_t* bytes8 = static_cast<const uint8_t*>(bytes);
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const char chars[] = "0123456789abcdef";
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std::string result;
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result.resize(len * 2);
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for (size_t i = 0; i < len; i++) {
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result[2 * i] = chars[bytes8[i] >> 4];
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result[2 * i + 1] = chars[bytes8[i] & 0xf];
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}
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return result;
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}
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} // namespace base
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} // namespace android
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