System.Xml.Schema.SelectorActiveAxis.PushKS C# (CSharp) Method

        public int PushKS (int errline, int errcol) {
            // new KeySequence each time
            KeySequence ks = new KeySequence(cs.TableDim, errline, errcol);

            // needs to clear KSStruct before using
            KSStruct kss;
            if (KSpointer < KSs.Count) {
                // reuse, clear up KSs.KSpointer
                kss = (KSStruct) KSs[KSpointer];
                kss.ks = ks;
                // reactivate LocatedActiveAxis
                for (int i = 0; i < cs.TableDim; i ++) {
                    kss.fields[i].Reactivate(ks);               // reassociate key sequence
                }
            }
            else { // "==", new
                kss = new KSStruct(ks, cs.TableDim);
                for (int i = 0; i < cs.TableDim; i ++) {
                    kss.fields[i] = new LocatedActiveAxis (cs.constraint.Fields[i], ks, i);
                    cs.axisFields.Add (kss.fields[i]);          // new, add to axisFields
                }
                KSs.Add(kss);
            }
            
            kss.depth = this.CurrentDepth - 1;
            
            return (KSpointer ++);
        }