<?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); } }