TStr TNodeJsFPath::GetCanonicalPath(const TStr& FPath) {
// Get absolute path
TStr AbsFPath = TStr::GetNrAbsFPath(FPath);
// Remove any redundancies
TStrV CanonV; AbsFPath.SplitOnAllCh('/', CanonV);
TSStack<TStr> CanonS; TStr CurrStr;
for (int ElN = 0; ElN < CanonV.Len(); ++ElN) {
CurrStr = CanonV.GetVal(ElN);
if (CurrStr == "..") {
EAssertR(!CanonS.Empty(), "Stack empty");
CanonS.Pop();
} else if (CurrStr != ".") {
CanonS.Push(CurrStr+"/");
}
}
// Assemble the canonical path (from left to right
EAssertR(!CanonS.Empty(), "Stack empty");
// We start with drive letter (Windows) or slash (Unix)
TChA CanonFPath = AbsFPath.LeftOf('/'); CanonFPath += '/';
// Get the rest of the path
for (int CanonN = CanonS.Len() - 1; CanonN >= 0; CanonN--) {
CanonFPath += CanonS[CanonN];
}
// Done
return CanonFPath;
}
void TGraphCascade::TopologicalSort(TIntV& SortedNIdV) {
int Nodes = Graph.GetNodes();
SortedNIdV.Gen(Nodes, 0); // result
THash<TInt, TBool> Marks(Nodes); // nodeid -> mark map
THash<TInt,TBool> TempMarks(Nodes); // nodeid -> temp mark map
THash<TInt, TBool> Added(Nodes);
TIntV NIdV; Graph.GetNIdV(NIdV); // all node ids
// set marks
for (int NodeN = 0; NodeN < Nodes; NodeN++) {
int NodeId = NIdV[NodeN];
Marks.AddDat(NodeId, false);
TempMarks.AddDat(NodeId, false);
Added.AddDat(NodeId, false);
}
TSStack<TInt> Stack;
for (int NodeN = 0; NodeN < Nodes; NodeN++) {
int NodeId = NIdV[NodeN];
// select an unmarked node
if (!Marks.GetDat(NodeId)) {
Stack.Push(NodeId);
while (!Stack.Empty()) {
// visit TopNode
int TopNodeId = Stack.Top();
Marks.GetDat(TopNodeId) = true;
TempMarks.GetDat(TopNodeId) = true;
// add children, set their temp marks to true
TNGraph::TNodeI NI = Graph.GetNI(TopNodeId);
int Children = NI.GetOutDeg();
bool IsFinal = true;
for (int ChildN = 0; ChildN < Children; ChildN++) {
int ChildId = NI.GetOutNId(ChildN);
EAssertR(!TempMarks.GetDat(ChildId), "TGraphCascade::TopologicalSort: the graph is not a DAG!");
if (!Marks.GetDat(ChildId)) {
// unvisited node
IsFinal = false;
Stack.Push(ChildId);
}
}
if (IsFinal) {
// push TopNode to tail
if (!Added.GetDat(TopNodeId)) {
SortedNIdV.Add(TopNodeId);
Added.GetDat(TopNodeId) = true;
}
TempMarks.GetDat(TopNodeId) = false;
Stack.Pop();
}
}
}
}
SortedNIdV.Reverse();
}
