mirror of
https://github.com/SerenityOS/serenity
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55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Array.h>
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#include <AK/ByteBuffer.h>
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#include <AK/Hex.h>
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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namespace AK {
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Optional<ByteBuffer> decode_hex(StringView input)
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{
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if ((input.length() % 2) != 0)
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return {};
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auto output_result = ByteBuffer::create_zeroed(input.length() / 2);
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if (!output_result.has_value())
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return {};
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auto& output = output_result.value();
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for (size_t i = 0; i < input.length() / 2; ++i) {
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const auto c1 = decode_hex_digit(input[i * 2]);
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if (c1 >= 16)
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return {};
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const auto c2 = decode_hex_digit(input[i * 2 + 1]);
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if (c2 >= 16)
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return {};
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output[i] = (c1 << 4) + c2;
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}
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return output_result;
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}
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String encode_hex(const ReadonlyBytes input)
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{
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StringBuilder output(input.size() * 2);
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for (auto ch : input)
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output.appendff("{:02x}", ch);
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return output.build();
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}
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}
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