src/core/common/data.cpp

/*
 *  Copyright (c) 2021, The OpenThread Authors.
 *  All rights reserved.
 *
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 *  modification, are permitted provided that the following conditions are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the copyright holder nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 */

/**
 * @file
 *   This file implements `Data` related function
 */

#include "data.hpp"

namespace ot {

bool DataUtils::MatchBytes(const uint8_t *aFirstBuffer,
                           const uint8_t *aSecondBuffer,
                           uint16_t       aLength,
                           ByteMatcher    aMatcher)
{
    bool matches = true;

    if (aMatcher == nullptr)
    {
        matches = (memcmp(aFirstBuffer, aSecondBuffer, aLength) == 0);
        ExitNow();
    }

    while (aLength-- != 0)
    {
        VerifyOrExit(aMatcher(*aFirstBuffer++, *aSecondBuffer++), matches = false);
    }

exit:
    return matches;
}

} // namespace ot