vendor/khanamiryan/qrcode-detector-decoder/lib/qrcode/decoder/DataBlock.php

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<?php
/*
 * Copyright 2007 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Zxing\Qrcode\Decoder;

/**
 * <p>Encapsulates a block of data within a QR Code. QR Codes may split their data into
 * multiple blocks, each of which is a unit of data and error-correction codewords. Each
 * is represented by an instance of this class.</p>
 *
 * @author Sean Owen
 */
final class DataBlock {

    private $numDataCodewords;
    private $codewords; //byte[]

    private function __construct($numDataCodewords, $codewords) {
        $this->numDataCodewords = $numDataCodewords;
        $this->codewords = $codewords;
    }

    /**
     * <p>When QR Codes use multiple data blocks, they are actually interleaved.
     * That is, the first byte of data block 1 to n is written, then the second bytes, and so on. This
     * method will separate the data into original blocks.</p>
     *
     * @param rawCodewords bytes as read directly from the QR Code
     * @param version version of the QR Code
     * @param ecLevel error-correction level of the QR Code
     * @return DataBlocks containing original bytes, "de-interleaved" from representation in the
     *         QR Code
     */
    static function getDataBlocks($rawCodewords,
                                  $version,
                                  $ecLevel) {

        if (count($rawCodewords) != $version->getTotalCodewords()) {
            throw new \InvalidArgumentException();
        }

        // Figure out the number and size of data blocks used by this version and
        // error correction level
        $ecBlocks = $version->getECBlocksForLevel($ecLevel);

        // First count the total number of data blocks