Added filtering for results

results.go

@@ -57,6 +57,19 @@ func (r Searchresults) Less(i, j int) bool {
 	}
 }
 
+// Filter returns the subset of results that match filter
+func (r Searchresults) Filter(filter SCFilter) Searchresults {
+	filtered := make(Searchresults, len(r))
+	matches := 0
+	for _, cert := range r {
+		if filter(cert) {
+			filtered[matches] = cert
+			matches++
+		}
+	}
+	return filtered[:matches]
+}
+
 func (r Searchresults) JSONString(watchers map[int]*AttributeState) []byte {
 	result := JSONShell{
 		Results: make([]*JSONResult, len(r)),