Classes List

Symfony\Component\Translation\Loader\MoFileLoader

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<?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;

/** * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/) */
class MoFileLoader extends FileLoader
{
    /** * 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. */
    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. */
    const MO_BIG_ENDIAN_MAGIC = 0xde120495;

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

    /** * Parses machine object (MO) format, independent of the machine's endian it * was created on. Both 32bit and 64bit systems are supported. * * {@inheritdoc} */
    protected function loadResource($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.');
        }
        $magic = unpack('V1'fread($stream4));
        $magic = hexdec(substr(dechex(current($magic)), -8));

        if (self::MO_LITTLE_ENDIAN_MAGIC == $magic) {
            $isBigEndian = false;
        } elseif (self::MO_BIG_ENDIAN_MAGIC == $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) {
            $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 (false !== strpos($singularId"\000")) {
                list($singularId$pluralId) = explode("\000"$singularId);
            }

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

            if ($length < 1) {
                continue;
            }

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

            if (false !== strpos($translated"\000")) {
                $translated = explode("\000"$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 endianness. * * @param resource $stream * @param bool $isBigEndian * * @return int */
    private function readLong($stream$isBigEndian)
    {
        $result = unpack($isBigEndian ? 'N1' : 'V1'fread($stream4));
        $result = current($result);

        return (int) substr($result, -8);
    }
}