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// File: TCollection_Stack.gxx
// Created: Mon Jan 18 14:30:12 1993
// Author: Remi LEQUETTE
// <rle@phylox>
#include <Standard_NoSuchObject.hxx>
//=======================================================================
//function : TCollection_Stack
//purpose :
//=======================================================================
TCollection_Stack::TCollection_Stack() :
myTop(NULL),
myDepth(0)
{
}
//=======================================================================
//function : TCollection_Stack
//purpose :
//=======================================================================
TCollection_Stack::TCollection_Stack(const TCollection_Stack& Other)
{
if (!Other.IsEmpty()) {
cout << "WARNING copy constructor of non empty stack !"<<endl;
}
TCollection_StackNode* p = (TCollection_StackNode*) Other.myTop;
TCollection_StackNode* q;
TCollection_StackNode* r = NULL;
myTop = NULL;
while (p) {
q = new TCollection_StackNode(p->Value(),(TCollection_MapNode*)0L);
if (r) r->Next() = q;
else myTop = q;
r = q;
p = (TCollection_StackNode*)p->Next();
}
myDepth = Other.myDepth;
}
//=======================================================================
//function : Assign
//purpose :
//=======================================================================
const TCollection_Stack& TCollection_Stack::Assign
(const TCollection_Stack& Other)
{
if (this == &Other) return *this;
Clear();
TCollection_StackNode* p = (TCollection_StackNode*) Other.myTop;
TCollection_StackNode* q;
TCollection_StackNode* r = NULL;
while (p) {
q = new TCollection_StackNode(p->Value(),(TCollection_MapNode*)0L);
if (r) r->Next() = q;
else myTop = q;
r = q;
p = (TCollection_StackNode*)p->Next();
}
myDepth = Other.myDepth;
return *this;
}
//=======================================================================
//function : Top
//purpose :
//=======================================================================
const Item& TCollection_Stack::Top() const
{
Standard_NoSuchObject_Raise_if(IsEmpty(),"TCollection_Stack");
return ((TCollection_StackNode*)myTop)->Value();
}
//=======================================================================
//function : Push
//purpose :
//=======================================================================
void TCollection_Stack::Push(const Item& I)
{
myTop = new TCollection_StackNode(I,(TCollection_StackNode*)myTop);
myDepth++;
}
//=======================================================================
//function : Pop
//purpose :
//=======================================================================
void TCollection_Stack::Pop()
{
Standard_NoSuchObject_Raise_if(IsEmpty(),"TCollection_Stack");
TCollection_StackNode* p = (TCollection_StackNode*) myTop;
myTop = p->Next();
delete p;
myDepth--;
}
//=======================================================================
//function : Clear
//purpose :
//=======================================================================
void TCollection_Stack::Clear()
{
TCollection_StackNode* p = (TCollection_StackNode*) myTop;
TCollection_StackNode* q;
while(p) {
q = (TCollection_StackNode*)p->Next();
delete p;
p = q;
}
myDepth = 0;
myTop = NULL;
}
//=======================================================================
//function : ChangeTop
//purpose :
//=======================================================================
Item& TCollection_Stack::ChangeTop()
{
Standard_NoSuchObject_Raise_if(IsEmpty(),"TCollection_Stack");
return ((TCollection_StackNode*)myTop)->Value();
}
//=======================================================================
//function : Next
//purpose :
//=======================================================================
void TCollection_StackIterator::Next()
{
current = ((TCollection_StackNode*)current)->Next();
}
//=======================================================================
//function : Value
//purpose :
//=======================================================================
const Item& TCollection_StackIterator::Value() const
{
Standard_NoSuchObject_Raise_if(current == NULL,
"TCollection_StackIterator");
return ((TCollection_StackNode*)current)->Value();
}
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