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https://github.com/SerenityOS/serenity
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5ed7cd6e32
These changes are compatible with clang-format 16 and will be mandatory when we eventually bump clang-format version. So, since there are no real downsides, let's commit them now.
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, Sam Atkins <atkinssj@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/Hex.h>
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#include <AK/StringBuilder.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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ErrorOr<ByteBuffer> decode_hex(StringView input)
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{
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if ((input.length() % 2) != 0)
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return Error::from_string_view_or_print_error_and_return_errno("Hex string was not an even length"sv, EINVAL);
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auto output = TRY(ByteBuffer::create_zeroed(input.length() / 2));
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for (size_t i = 0; i < input.length() / 2; ++i) {
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auto const c1 = decode_hex_digit(input[i * 2]);
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if (c1 >= 16)
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return Error::from_string_view_or_print_error_and_return_errno("Hex string contains invalid digit"sv, EINVAL);
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auto const c2 = decode_hex_digit(input[i * 2 + 1]);
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if (c2 >= 16)
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return Error::from_string_view_or_print_error_and_return_errno("Hex string contains invalid digit"sv, EINVAL);
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output[i] = (c1 << 4) + c2;
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}
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return { move(output) };
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}
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#ifdef KERNEL
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ErrorOr<NonnullOwnPtr<Kernel::KString>> encode_hex(ReadonlyBytes const 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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TRY(output.try_appendff("{:02x}", ch));
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return Kernel::KString::try_create(output.string_view());
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}
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#else
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ByteString encode_hex(ReadonlyBytes const 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.to_byte_string();
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}
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#endif
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}
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