+
+function closestHouseNumber($aRow)
+{
+ $fHouse = $aRow['startnumber']
+ + ($aRow['endnumber'] - $aRow['startnumber']) * $aRow['fraction'];
+
+ switch ($aRow['interpolationtype']) {
+ case 'odd':
+ $iHn = (int)($fHouse/2) * 2 + 1;
+ break;
+ case 'even':
+ $iHn = (int)(round($fHouse/2)) * 2;
+ break;
+ default:
+ $iHn = (int)(round($fHouse));
+ break;
+ }
+
+ return max(min($aRow['endnumber'], $iHn), $aRow['startnumber']);
+}