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File Content: `MoFileLoader.php`

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Translation\Loader;

use Symfony\Component\Translation\Exception\InvalidResourceException;
use Symfony\Component\Translation\Exception\NotFoundResourceException;
use Symfony\Component\Config\Resource\FileResource;

/**
 * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/)
 */
class MoFileLoader extends ArrayLoader implements LoaderInterface
{
    /**
     * Magic used for validating the format of a MO file as well as
     * detecting if the machine used to create that file was little endian.
     *
     * @var float
     */
    const MO_LITTLE_ENDIAN_MAGIC = 0x950412de;

    /**
     * Magic used for validating the format of a MO file as well as
     * detecting if the machine used to create that file was big endian.
     *
     * @var float
     */
    const MO_BIG_ENDIAN_MAGIC = 0xde120495;

    /**
     * The size of the header of a MO file in bytes.
     *
     * @var integer Number of bytes.
     */
    const MO_HEADER_SIZE = 28;

    public function load($resource, $locale, $domain = 'messages')
    {
        if (!stream_is_local($resource)) {
            throw new InvalidResourceException(sprintf('This is not a local file "%s".', $resource));
        }

        if (!file_exists($resource)) {
            throw new NotFoundResourceException(sprintf('File "%s" not found.', $resource));
        }

        $messages = $this->parse($resource);

        // empty file
        if (null === $messages) {
            $messages = array();
        }

        // not an array
        if (!is_array($messages)) {
            throw new InvalidResourceException(sprintf('The file "%s" must contain a valid mo file.', $resource));
        }

        $catalogue = parent::load($messages, $locale, $domain);
        $catalogue->addResource(new FileResource($resource));

        return $catalogue;
    }

    /**
     * Parses machine object (MO) format, independent of the machine's endian it
     * was created on. Both 32bit and 64bit systems are supported.
     *
     * @param resource $resource
     *
     * @return array
     * @throws InvalidResourceException If stream content has an invalid format.
     */
    private function parse($resource)
    {
        $stream = fopen($resource, 'r');

        $stat = fstat($stream);

        if ($stat['size'] < self::MO_HEADER_SIZE) {
            throw new InvalidResourceException("MO stream content has an invalid format.");
        }
        $magic = unpack('V1', fread($stream, 4));
        $magic = hexdec(substr(dechex(current($magic)), -8));

        if ($magic == self::MO_LITTLE_ENDIAN_MAGIC) {
            $isBigEndian = false;
        } elseif ($magic == self::MO_BIG_ENDIAN_MAGIC) {
            $isBigEndian = true;
        } else {
            throw new InvalidResourceException("MO stream content has an invalid format.");
        }

        // formatRevision
        $this->readLong($stream, $isBigEndian);
        $count = $this->readLong($stream, $isBigEndian);
        $offsetId = $this->readLong($stream, $isBigEndian);
        $offsetTranslated = $this->readLong($stream, $isBigEndian);
        // sizeHashes
        $this->readLong($stream, $isBigEndian);
        // offsetHashes
        $this->readLong($stream, $isBigEndian);

        $messages = array();

        for ($i = 0; $i < $count; $i++) {
            $singularId = $pluralId = null;
            $translated = null;

            fseek($stream, $offsetId + $i * 8);

            $length = $this->readLong($stream, $isBigEndian);
            $offset = $this->readLong($stream, $isBigEndian);

            if ($length < 1) {
                continue;
            }

            fseek($stream, $offset);
            $singularId = fread($stream, $length);

            if (strpos($singularId, "\000") !== false) {
                list($singularId, $pluralId) = explode("\000", $singularId);
            }

            fseek($stream, $offsetTranslated + $i * 8);
            $length = $this->readLong($stream, $isBigEndian);
            $offset = $this->readLong($stream, $isBigEndian);

            fseek($stream, $offset);
            $translated = fread($stream, $length);

            if (strpos($translated, "\000") !== false) {
                $translated = explode("\000", $translated);
            }

            $ids = array('singular' => $singularId, 'plural' => $pluralId);
            $item = compact('ids', 'translated');

            if (is_array($item['translated'])) {
                $messages[$item['ids']['singular']] = stripcslashes($item['translated'][0]);
                if (isset($item['ids']['plural'])) {
                    $plurals = array();
                    foreach ($item['translated'] as $plural => $translated) {
                        $plurals[] = sprintf('{%d} %s', $plural, $translated);
                    }
                    $messages[$item['ids']['plural']] = stripcslashes(implode('|', $plurals));
                }
            } elseif (!empty($item['ids']['singular'])) {
                $messages[$item['ids']['singular']] = stripcslashes($item['translated']);
            }
        }

        fclose($stream);

        return array_filter($messages);
    }

    /**
     * Reads an unsigned long from stream respecting endianess.
     *
     * @param  resource $stream
     * @param  boolean  $isBigEndian
     * @return integer
     */
    private function readLong($stream, $isBigEndian)
    {
        $result = unpack($isBigEndian ? 'N1' : 'V1', fread($stream, 4));
        $result = current($result);

        return (integer) substr($result, -8);
    }
}
Name	Size	Permission
schema	---	0755
ArrayLoader.php	1948 bytes	0644
CsvFileLoader.php	2594 bytes	0644
IcuDatFileLoader.php	1679 bytes	0644
IcuResFileLoader.php	2682 bytes	0644
IniFileLoader.php	1261 bytes	0644
JsonFileLoader.php	2421 bytes	0644
LoaderInterface.php	1140 bytes	0644
MoFileLoader.php	5855 bytes	0644
PhpFileLoader.php	1339 bytes	0644
PoFileLoader.php	6138 bytes	0644
QtFileLoader.php	2548 bytes	0644
XliffFileLoader.php	5186 bytes	0644
YamlFileLoader.php	2001 bytes	0644
File Content: MoFileLoader.php

File Content: `MoFileLoader.php`
