/**
* Retrieve or insert a value in the index.
*
* @param string $idx name of the index
* @param string $suffix subpart identifier
* @param string $value line to find in the index
* @return int|bool line number of the value in the index or false if writing the index failed
* @author Tom N Harris <*****@*****.**>
*/
protected function addIndexKey($idx, $suffix, $value)
{
$key = $idx . $suffix;
if (isset($this->indexes[$key]) === false) {
$this->indexes[$key] = parent::getIndex($idx, $suffix);
}
$id = array_search($value, $this->indexes[$key], true);
if ($id === false) {
$id = count($this->indexes[$key]);
$this->indexes[$key][$id] = $value;
if (isset($this->indexesToFlush[$key]) === false) {
$this->indexesToFlush[$key] = array($idx, $suffix);
}
}
return $id;
}
