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<?php |
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namespace Gettext\Loader; |
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use Gettext\Translations; |
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use Gettext\Translation; |
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use Exception; |
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/** |
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* Class to load a MO file |
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*/ |
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final class MoLoader extends Loader |
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{ |
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private $string; |
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private $position; |
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private $length; |
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private const MAGIC1 = -1794895138; |
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private const MAGIC2 = -569244523; |
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private const MAGIC3 = 2500072158; |
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public function loadString(string $string, Translations $translations = null): Translations |
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{ |
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$translations = parent::loadString($string, $translations); |
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$this->init($string); |
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$magic = $this->readInt('V'); |
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if (($magic === self::MAGIC1) || ($magic === self::MAGIC3)) { //to make sure it works for 64-bit platforms |
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$byteOrder = 'V'; //low endian |
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} elseif ($magic === (self::MAGIC2 & 0xFFFFFFFF)) { |
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$byteOrder = 'N'; //big endian |
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} else { |
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throw new Exception('Not MO file'); |
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} |
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$this->readInt($byteOrder); |
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$total = $this->readInt($byteOrder); //total string count |
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$originals = $this->readInt($byteOrder); //offset of original table |
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$tran = $this->readInt($byteOrder); //offset of translation table |
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$this->seekto($originals); |
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$table_originals = $this->readIntArray($byteOrder, $total * 2); |
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$this->seekto($tran); |
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$table_translations = $this->readIntArray($byteOrder, $total * 2); |
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for ($i = 0; $i < $total; ++$i) { |
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$next = $i * 2; |
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$this->seekto($table_originals[$next + 2]); |
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$original = $this->read($table_originals[$next + 1]); |
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$this->seekto($table_translations[$next + 2]); |
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$translated = $this->read($table_translations[$next + 1]); |
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// Headers |
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if ($original === '') { |
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foreach (explode("\n", $translated) as $headerLine) { |
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if ($headerLine === '') { |
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continue; |
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} |
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$headerChunks = preg_split('/:\s*/', $headerLine, 2); |
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$translations->getHeaders()->set($headerChunks[0], isset($headerChunks[1]) ? $headerChunks[1] : ''); |
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} |
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continue; |
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} |
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$context = $plural = null; |
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$chunks = explode("\x04", $original, 2); |
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if (isset($chunks[1])) { |
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list($context, $original) = $chunks; |
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} |
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$chunks = explode("\x00", $original, 2); |
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if (isset($chunks[1])) { |
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list($original, $plural) = $chunks; |
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} |
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$translation = $this->createTranslation($context, $original, $plural); |
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$translations->add($translation); |
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if ($translated === '') { |
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continue; |
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} |
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if ($plural === null) { |
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$translation->translate($translated); |
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continue; |
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} |
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$v = explode("\x00", $translated); |
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$translation->translate(array_shift($v)); |
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$translation->translatePlural($v); |
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} |
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return $translations; |
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} |
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private function init(string $string): void |
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{ |
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$this->string = $string; |
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$this->position = 0; |
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$this->length = strlen($string); |
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} |
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private function read(int $bytes): string |
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{ |
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$data = substr($this->string, $this->position, $bytes); |
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$this->seekTo($this->position + $bytes); |
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return $data; |
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} |
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private function seekTo(int $position): void |
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{ |
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$this->position = ($this->length < $position) ? $this->length : $position; |
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} |
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private function readInt(string $byteOrder) |
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{ |
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if (($read = $this->read(4)) === false) { |
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return false; |
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} |
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$read = unpack($byteOrder, $read); |
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return array_shift($read); |
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} |
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private function readIntArray(string $byteOrder, int $count) |
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{ |
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return unpack($byteOrder.$count, $this->read(4 * $count)); |
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} |
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} |
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oscarotero /
Gettext
