protected function _parseMo($stream) {
		$stat = fstat($stream);

		if ($stat['size'] < self::MO_HEADER_SIZE) {
			throw new RangeException("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 RangeException("MO stream content has an invalid format.");
		}

		$header = array(
			'formatRevision' => null,
			'count' => null,
			'offsetId' => null,
			'offsetTranslated' => null,
			'sizeHashes' => null,
			'offsetHashes' => null
		);
		foreach ($header as &$value) {
			$value = $this->_readLong($stream, $isBigEndian);
		}
		extract($header);
		$data = array();

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

			if (strpos($singularId, "\004") !== false) {
				list($context, $singularId) = explode("\004", $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);
			$data = $this->_merge($data, compact('ids', 'translated', 'context'));
		}
		return $data;
	}