mirror of
https://github.com/SerenityOS/serenity
synced 2024-10-07 00:19:27 +00:00
45cf40653a
Apologies for the enormous commit, but I don't see a way to split this up nicely. In the vast majority of cases it's a simple change. A few extra places can use TRY instead of manual error checking though. :^)
55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Array.h>
|
|
#include <AK/ByteBuffer.h>
|
|
#include <AK/Hex.h>
|
|
#include <AK/String.h>
|
|
#include <AK/StringBuilder.h>
|
|
#include <AK/StringView.h>
|
|
#include <AK/Types.h>
|
|
#include <AK/Vector.h>
|
|
|
|
namespace AK {
|
|
|
|
Optional<ByteBuffer> decode_hex(StringView input)
|
|
{
|
|
if ((input.length() % 2) != 0)
|
|
return {};
|
|
|
|
auto output_result = ByteBuffer::create_zeroed(input.length() / 2);
|
|
if (output_result.is_error())
|
|
return {};
|
|
|
|
auto& output = output_result.value();
|
|
|
|
for (size_t i = 0; i < input.length() / 2; ++i) {
|
|
const auto c1 = decode_hex_digit(input[i * 2]);
|
|
if (c1 >= 16)
|
|
return {};
|
|
|
|
const auto c2 = decode_hex_digit(input[i * 2 + 1]);
|
|
if (c2 >= 16)
|
|
return {};
|
|
|
|
output[i] = (c1 << 4) + c2;
|
|
}
|
|
|
|
return output_result.release_value();
|
|
}
|
|
|
|
String encode_hex(const ReadonlyBytes input)
|
|
{
|
|
StringBuilder output(input.size() * 2);
|
|
|
|
for (auto ch : input)
|
|
output.appendff("{:02x}", ch);
|
|
|
|
return output.build();
|
|
}
|
|
|
|
}
|