public static SubList <T> SortedMerge(SubList <T> first, SubList <T> second, IComparer <T> comp)
{
if ((first.Index + first.Length != second.Index &&
second.Index + second.Length != first.Index) ||
first.MainList != second.MainList)
{
throw new InvalidOperationException();
}
SubList <T> result = new SubList <T>(first.MainList,
Math.Min(first.Index, second.Index),
first.Length + second.Length);
var mainList = first.MainList;
for (int i = Math.Max(first.Index, second.Index); i < result.Length; i++)
{
for (int j = i - 1; j >= 0; j--)
{
if (comp.Compare(mainList[j], mainList[i]) < 0)
{
if (i != j + 1)
{
T temp = mainList[i];
mainList.RemoveAt(i);
mainList.Insert(j + 1, temp);
}
break;
}
}
}
return(result);
}
public static void MergeSort <T>(this IList <T> list, IComparer <T> comp)
{
if (list.Count > 1)
{
SubList <T> first = new SubList <T>(list, 0, list.Count / 2);
SubList <T> second = new SubList <T>(list, first.Length, list.Count - first.Length);
first.MergeSort(comp);
second.MergeSort(comp);
SubList <T> .SortedMerge(first, second, comp);
}
}