protected function seekToStart(Slice $slice)
{
$position = $this->fileObject->ftell();
$seekTo = $this->startPosition + $slice->getStart() - $position;
if ($seekTo == 0) {
return;
}
$this->fileObject->fseek($seekTo, SEEK_CUR);
}
protected function checkSlice(Slice $slice)
{
if ($slice->getFinish() > $this->getLength() || $slice->getStart() < 0) {
throw new \OutOfBoundsException(sprintf('the slice %s is outside the length %d of this line.', $slice, $this->getLength()));
}
}
/**
* 得到分表后的表名
* @param string $key
* @return string
*/
protected function _tableName($key)
{
return Slice::table($this->_sliceTable)->name($this->_table)->key($key)->execute();
}