private function cbString($m)
{
static $mapping = array('t' => "\t", 'n' => "\n", '"' => '"', '\\' => '\\', '/' => '/', '_' => "\xc2\xa0");
$sq = $m[0];
if (isset($mapping[$sq[1]])) {
return $mapping[$sq[1]];
} elseif ($sq[1] === 'u' && strlen($sq) === 6) {
return NStrings::chr(hexdec(substr($sq, 2)));
} elseif ($sq[1] === 'x' && strlen($sq) === 4) {
return chr(hexdec(substr($sq, 2)));
} else {
$this->error("Invalid escaping sequence $sq");
}
}
