/**
* ループスタート([)
*/
protected function commandLoopStart()
{
$c = $this->Memory->current();
if ($c != 0) {
return null;
}
$count = 0;
$length = mb_strlen($this->command);
for ($i = $this->position; $i < $length; $i++) {
if ($this->command[$i] == '[') {
$count++;
} elseif ($this->command[$i] == ']') {
$count--;
if ($count == 0) {
$this->position = $i;
break;
}
}
}
}
