/*

 * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#pragma once

#include <AK/ByteBuffer.h>

#include <AK/Error.h>

#include <AK/StringView.h>

#ifdef KERNEL

#    include <Kernel/Library/KString.h>

#else

#    include <AK/ByteString.h>

#endif

namespace AK {

constexpr u8 decode_hex_digit(char digit)

{

    if (digit >= '0' && digit <= '9')

        return digit - '0';

    if (digit >= 'a' && digit <= 'f')

        return 10 + (digit - 'a');

    if (digit >= 'A' && digit <= 'F')

        return 10 + (digit - 'A');

    return 255;

}

ErrorOr<ByteBuffer> decode_hex(StringView);

#ifdef KERNEL

ErrorOr<NonnullOwnPtr<Kernel::KString>> encode_hex(ReadonlyBytes);

#else

ByteString encode_hex(ReadonlyBytes);

#endif

}

#if USING_AK_GLOBALLY

using AK::decode_hex;

using AK::decode_hex_digit;

using AK::encode_hex;

#endif