public static ArrayIterator <T> Partition <T>(
this ArrayIterator <T> first,
ArrayIterator <T> last,
Func <T, bool> pred
)
{
while (first.NotEqual(last))
{
while (pred(first.GetCurrent()))
{
first = first.GetNext();
if (first.IsEqual(last))
{
return(first);
}
}
do
{
last = last.GetPrev();
if (first.IsEqual(last))
{
return(first);
}
} while (pred(last.GetCurrent()) == false);
first.Swap(last);
first = first.GetNext();
}
return(first);
}
public static void Reverse <T>(this ArrayIterator <T> first, ArrayIterator <T> last)
{
while ((first.NotEqual(last)) && (first.NotEqual((last = last.GetPrev()))))
{
first.Swap(last);
first = first.GetNext();
}
}
public static void SortHeap <T>(
this ArrayIterator <T> first,
ArrayIterator <T> last,
Func <T, T, bool> comp
)
{
while (first.Distance(last) > 1)
{
last = last.GetPrev();
Swap(first, last);
AdjustHeap(first.Array, first.Index, first.Index, last.Index, comp);
}
}
public static ArrayIterator <T> ReverseCopy <T>(
this ArrayIterator <T> first,
ArrayIterator <T> last,
ArrayIterator <T> result
)
{
while (first.NotEqual(last))
{
last = last.GetPrev();
result.SetCurrent(last.GetCurrent());
result = result.GetNext();
}
return(result);
}
public static ArrayIterator <T> CopyBackward <T>(
this ArrayIterator <T> first,
ArrayIterator <T> last,
ArrayIterator <T> result
)
{
while (last.NotEqual(first))
{
result = result.GetPrev();
last = last.GetPrev();
result.SetCurrent(last.GetCurrent());
}
return(result);
}
public static void PopHeap <T>(
this ArrayIterator <T> first,
ArrayIterator <T> last,
Func <T, T, bool> comp
)
{
if (first.Distance(last) < 2)
{
return;
}
last = last.GetPrev();
Swap(first, last);
AdjustHeap(first.Array, first.Index, first.Index, last.Index, comp);
}
public static void PushHeap <T>(
this ArrayIterator <T> first,
ArrayIterator <T> last,
Func <T, T, bool> comp
)
{
if (first.Distance(last) < 2)
{
return;
}
last = last.GetPrev();
var temp = last.GetCurrent();
var parent = first.GetAdvanced((first.Distance(last) - 1) / 2);
while (first.Distance(last) > 0 && comp(parent.GetCurrent(), temp))
{
last.SetCurrent(parent.GetCurrent());
last = parent;
parent = first.GetAdvanced((first.Distance(last) - 1) / 2);
}
last.SetCurrent(temp);
}