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#include <Standard_NoSuchObject.hxx>
#include <Standard_NotImplemented.hxx>
#include <Standard_NoMoreObject.hxx>
// ------------
// constructor
// -----------
PCollection_HStack::PCollection_HStack()
{
TheDepth = 0;
TheTop = new PCollection_StackNode;
}
// ------------------------------------
// Push : insert an item on the top
// ------------------------------------
void PCollection_HStack::Push(const Item& T)
{
TheTop = TheTop->Construct(T);
TheDepth = TheDepth + 1;
}
// ------------------------------------
// Pop : remove an item from the top
// ------------------------------------
void PCollection_HStack::Pop()
{
if (TheTop->IsEmpty()) Standard_NoSuchObject::Raise();
Handle(PCollection_StackNode) temp = TheTop;
TheTop = TheTop->Tail();
temp.Delete();
TheDepth = TheDepth - 1;
}
// -----------------------------
// IsEmpty : is the stack empty ?
// -----------------------------
Standard_Boolean PCollection_HStack::IsEmpty() const
{
return TheTop->IsEmpty();
}
// ------------------------------------
// Clear : remove all items
// ------------------------------------
void PCollection_HStack::Clear()
{
Handle(PCollection_StackNode) temp;
while (TheDepth != 0) {
temp = TheTop;
TheTop = TheTop->Tail();
temp.Delete();
--TheDepth;
}
}
// ------------------------------------
// ChangeTop : replace the top by T
// ------------------------------------
void PCollection_HStack::ChangeTop(const Item& T)
{
if (TheTop->IsEmpty()) Standard_NoSuchObject::Raise();
TheTop->SetValue(T);
}
// -----------------------------
// Top : item on the Top
// -----------------------------
Item PCollection_HStack::Top() const
{
if (TheTop->IsEmpty()) Standard_NoSuchObject::Raise();
return TheTop->Value();
}
// ------------------------------------
// ShallowCopy redefinition
// ------------------------------------
Handle(Standard_Persistent) PCollection_HStack::ShallowCopy() const
{
PCollection_HStack* TheCopy = new PCollection_HStack (*this);
TheCopy->TheTop =
Handle(PCollection_StackNode)::DownCast(::ShallowCopy(TheTop));
return TheCopy;
}
// ------------------------------------
// ShallowDump redefinition
// ------------------------------------
void PCollection_HStack::ShallowDump(Standard_OStream& S) const
{
S << "begin class Stack "<< endl;
S << "Length of Stack : "<< TheDepth << endl;
TheTop->ShallowDump(S);
S << "end of class Stack." << endl;
}
// -----------------------------
// Depth : numbers of items
// -----------------------------
Standard_Integer PCollection_HStack::Depth() const {
return TheDepth;
}
// -----------------------------
// FTop : Top of the Stack
// -----------------------------
Handle(PCollection_StackNode) PCollection_HStack::FTop() const {
return TheTop;
}
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