blob: b781536eeff7fc5ef232ec14c2a97d1286b82208 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
// Copyright: Matra-Datavision 1991
// File: PCollection_DepthFirstIterator.gxx
// Created: Wed May 29 17:42:50 1991
// Author: Denis PASCAL
// <dp>
// Revised by: Mireille MERCIEN
// Sep,7 1992
#include <Standard_NoMoreObject.hxx>
#include <Standard_NoSuchObject.hxx>
//---------------------------------------------------------------------------
// Constructor
//---------------------------------------------------------------------------
PCollection_DepthFirstIterator::
PCollection_DepthFirstIterator(const Handle(PCollection_Vertex)& V)
{
Visited = new PCollection_SetOfVertex;
Ready = new PCollection_StackOfVertex;
Visited->Add(V);
Ready->Push(V);
HasMore = ! (Ready->IsEmpty());
}
//---------------------------------------------------------------------------
// More
//---------------------------------------------------------------------------
Boolean PCollection_DepthFirstIterator::More () const
{
return HasMore;
}
//---------------------------------------------------------------------------
// Next
//---------------------------------------------------------------------------
void PCollection_DepthFirstIterator::Next ()
{
if (!HasMore) Standard_NoMoreObject::Raise();
Handle(PCollection_Vertex) w1 = Ready->Top();
Ready->Pop();
PCollection_FrontEdgesIterator It(w1);
while (It.More()) {
Handle(PCollection_Vertex) w2 = It.Value()->Destination();
if (! (Visited->Contains(w2))) {
Ready->Push(w2);
Visited->Add(w2);
}
It.Next();
}
HasMore = !(Ready->IsEmpty());
}
//---------------------------------------------------------------------------
// Value
//---------------------------------------------------------------------------
Handle(PCollection_Vertex) PCollection_DepthFirstIterator::Value () const
{
if (HasMore)
return Ready->Top();
else
Standard_NoSuchObject::Raise();
}
//---------------------------------------------------------------------------
// Clear
//---------------------------------------------------------------------------
void PCollection_DepthFirstIterator::Clear ()
{
HasMore = False;
Ready->Nullify();
Visited->Nullify();
}
|