TraceWizard.Diff.Diff.CreateDiffs C# (CSharp) Method

        private static Item[] CreateDiffs(DiffData DataA, DiffData DataB)
        {
            ArrayList a = new ArrayList();
            Item aItem;
            Item[] result;

            int StartA, StartB;
            int LineA, LineB;

            LineA = 0;
            LineB = 0;
            while (LineA < DataA.Length || LineB < DataB.Length)
            {
                if ((LineA < DataA.Length) && (!DataA.modified[LineA])
                  && (LineB < DataB.Length) && (!DataB.modified[LineB]))
                {
                    // equal lines
                    LineA++;
                    LineB++;

                }
                else {
                    // maybe deleted and/or inserted lines
                    StartA = LineA;
                    StartB = LineB;

                    while (LineA < DataA.Length && (LineB >= DataB.Length || DataA.modified[LineA]))
                        // while (LineA < DataA.Length && DataA.modified[LineA])
                        LineA++;

                    while (LineB < DataB.Length && (LineA >= DataA.Length || DataB.modified[LineB]))
                        // while (LineB < DataB.Length && DataB.modified[LineB])
                        LineB++;

                    if ((StartA < LineA) || (StartB < LineB))
                    {
                        // store a new difference-item
                        aItem = new Item();
                        aItem.StartA = StartA;
                        aItem.StartB = StartB;
                        aItem.deletedA = LineA - StartA;
                        aItem.insertedB = LineB - StartB;
                        a.Add(aItem);
                    } // if
                } // if
            } // while

            result = new Item[a.Count];
            a.CopyTo(result);

            return (result);
        }