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Extractors
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File: Mo.php
<?php namespace Gettext\Extractors; use Exception; use Gettext\Translations; use Gettext\Utils\StringReader; /** * Class to get gettext strings from .mo files. */ class Mo extends Extractor implements ExtractorInterface { const MAGIC1 = -1794895138; const MAGIC2 = -569244523; const MAGIC3 = 2500072158; protected static $stringReaderClass = 'Gettext\Utils\StringReader'; /** * {@inheritdoc} */ public static function fromString($string, Translations $translations, array $options = []) { /** @var StringReader $stream */ $stream = new static::$stringReaderClass($string); $magic = static::readInt($stream, 'V'); if (($magic === static::MAGIC1) || ($magic === static::MAGIC3)) { //to make sure it works for 64-bit platforms $byteOrder = 'V'; //low endian } elseif ($magic === (static::MAGIC2 & 0xFFFFFFFF)) { $byteOrder = 'N'; //big endian } else { throw new Exception('Not MO file'); } static::readInt($stream, $byteOrder); $total = static::readInt($stream, $byteOrder); //total string count $originals = static::readInt($stream, $byteOrder); //offset of original table $tran = static::readInt($stream, $byteOrder); //offset of translation table $stream->seekto($originals); $table_originals = static::readIntArray($stream, $byteOrder, $total * 2); $stream->seekto($tran); $table_translations = static::readIntArray($stream, $byteOrder, $total * 2); for ($i = 0; $i < $total; ++$i) { $next = $i * 2; $stream->seekto($table_originals[$next + 2]); $original = $stream->read($table_originals[$next + 1]); $stream->seekto($table_translations[$next + 2]); $translated = $stream->read($table_translations[$next + 1]); if ($original === '') { // Headers foreach (explode("\n", $translated) as $headerLine) { if ($headerLine === '') { continue; } $headerChunks = preg_split('/:\s*/', $headerLine, 2); $translations->setHeader($headerChunks[0], isset($headerChunks[1]) ? $headerChunks[1] : ''); } continue; } $chunks = explode("\x04", $original, 2); if (isset($chunks[1])) { $context = $chunks[0]; $original = $chunks[1]; } else { $context = ''; } $chunks = explode("\x00", $original, 2); if (isset($chunks[1])) { $original = $chunks[0]; $plural = $chunks[1]; } else { $plural = ''; } $translation = $translations->insert($context, $original, $plural); if ($translated === '') { continue; } if ($plural === '') { $translation->setTranslation($translated); continue; } $v = explode("\x00", $translated); $translation->setTranslation(array_shift($v)); $translation->setPluralTranslations($v); } } /** * @param StringReader $stream * @param string $byteOrder */ protected static function readInt(StringReader $stream, $byteOrder) { if (($read = $stream->read(4)) === false) { return false; } $read = unpack($byteOrder, $read); return array_shift($read); } /** * @param StringReader $stream * @param string $byteOrder * @param int $count */ protected static function readIntArray(StringReader $stream, $byteOrder, $count) { return unpack($byteOrder.$count, $stream->read(4 * $count)); } }