FM / CrossReference

/home/techb158/ileadtechnology.com/vendor/setasign/fpdi/src/PdfParser/CrossReference/

/home/techb158/ileadtechnology.com/vendor/setasign/fpdi/src/PdfParser/CrossReference

Name	Size	Mode	Actions
AbstractReader.php	2500	0644	edit dl rm
CrossReference.php	9975	0644	edit dl rm
CrossReferenceException.php	1277	0644	edit dl rm
FixedReader.php	5890	0644	edit dl rm
LineReader.php	4801	0644	edit dl rm
ReaderInterface.php	766	0644	edit dl rm

Edit: /home/techb158/ileadtechnology.com/vendor/setasign/fpdi/src/PdfParser/CrossReference/LineReader.php (4801B)

<?php

/**
 * This file is part of FPDI
 *
 * @package   setasign\Fpdi
 * @copyright Copyright (c) 2023 Setasign GmbH & Co. KG (https://www.setasign.com)
 * @license   http://opensource.org/licenses/mit-license The MIT License
 */

namespace setasign\Fpdi\PdfParser\CrossReference;

use setasign\Fpdi\PdfParser\PdfParser;
use setasign\Fpdi\PdfParser\StreamReader;

/**
 * Class LineReader
 *
 * This reader class read all cross-reference entries in a single run.
 * It supports reading cross-references with e.g. invalid data (e.g. entries with a length < or > 20 bytes).
 */
class LineReader extends AbstractReader implements ReaderInterface
{
    /**
     * The object offsets.
     *
     * @var array
     */
    protected $offsets;

/**
     * LineReader constructor.
     *
     * @param PdfParser $parser
     * @throws CrossReferenceException
     */
    public function __construct(PdfParser $parser)
    {
        $this->read($this->extract($parser->getStreamReader()));
        parent::__construct($parser);
    }

/**
     * @inheritdoc
     * @return int|false
     */
    public function getOffsetFor($objectNumber)
    {
        if (isset($this->offsets[$objectNumber])) {
            return $this->offsets[$objectNumber][0];
        }

return false;
    }

/**
     * Get all found offsets.
     *
     * @return array
     */
    public function getOffsets()
    {
        return $this->offsets;
    }

/**
     * Extracts the cross reference data from the stream reader.
     *
     * @param StreamReader $reader
     * @return string
     * @throws CrossReferenceException
     */
    protected function extract(StreamReader $reader)
    {
        $bytesPerCycle = 100;
        $reader->reset(null, $bytesPerCycle);

$cycles = 0;
        do {
            // 6 = length of "trailer" - 1
            $pos = \max(($bytesPerCycle * $cycles) - 6, 0);
            $trailerPos = \strpos($reader->getBuffer(false), 'trailer', $pos);
            $cycles++;
        } while ($trailerPos === false && $reader->increaseLength($bytesPerCycle) !== false);

if ($trailerPos === false) {
            throw new CrossReferenceException(
                'Unexpected end of cross reference. "trailer"-keyword not found.',
                CrossReferenceException::NO_TRAILER_FOUND
            );
        }

$xrefContent = \substr($reader->getBuffer(false), 0, $trailerPos);
        $reader->reset($reader->getPosition() + $trailerPos);

return $xrefContent;
    }

/**
     * Read the cross-reference entries.
     *
     * @param string $xrefContent
     * @throws CrossReferenceException
     */
    protected function read($xrefContent)
    {
        // get eol markers in the first 100 bytes
        \preg_match_all("/(\r\n|\n|\r)/", \substr($xrefContent, 0, 100), $m);

if (\count($m[0]) === 0) {
            throw new CrossReferenceException(
                'No data found in cross-reference.',
                CrossReferenceException::INVALID_DATA
            );
        }

// count(array_count_values()) is faster then count(array_unique())
        // @see https://github.com/symfony/symfony/pull/23731
        // can be reverted for php7.2
        $differentLineEndings = \count(\array_count_values($m[0]));
        if ($differentLineEndings > 1) {
            $lines = \preg_split("/(\r\n|\n|\r)/", $xrefContent, -1, PREG_SPLIT_NO_EMPTY);
        } else {
            $lines = \explode($m[0][0], $xrefContent);
        }

unset($differentLineEndings, $m);
        if (!\is_array($lines)) {
            $this->offsets = [];
            return;
        }

$start = 0;
        $offsets = [];

// trim all lines and remove empty lines
        $lines = \array_filter(\array_map('\trim', $lines));
        foreach ($lines as $line) {
            $pieces = \explode(' ', $line);

switch (\count($pieces)) {
                case 2:
                    $start = (int) $pieces[0];
                    break;

case 3:
                    switch ($pieces[2]) {
                        case 'n':
                            $offsets[$start] = [(int) $pieces[0], (int) $pieces[1]];
                            $start++;
                            break 2;
                        case 'f':
                            $start++;
                            break 2;
                    }
                    // fall through if pieces doesn't match

default:
                    throw new CrossReferenceException(
                        \sprintf('Unexpected data in xref table (%s)', \implode(' ', $pieces)),
                        CrossReferenceException::INVALID_DATA
                    );
            }
        }

$this->offsets = $offsets;
    }
}

cmd: