// The function front scans the frontier of nodePtr. It returns the keys
// of the leaves found in the frontier of nodePtr in a SListPure.
// These keys include keys of direction indicators detected in the frontier.
//
// No direction is assigned to the direction indicators.
//
void EmbedPQTree::getFront(
PQNode<edge,indInfo*,bool>* nodePtr,
SListPure<PQBasicKey<edge,indInfo*,bool>*> &keys)
{
Stack<PQNode<edge,indInfo*,bool>*> S;
S.push(nodePtr);
while (!S.empty())
{
PQNode<edge,indInfo*,bool> *checkNode = S.pop();
if (checkNode->type() == PQNodeRoot::leaf)
keys.pushBack((PQBasicKey<edge,indInfo*,bool>*) checkNode->getKey());
else
{
PQNode<edge,indInfo*,bool>* firstSon = 0;
if (checkNode->type() == PQNodeRoot::PNode)
{
firstSon = checkNode->referenceChild();
}
else if (checkNode->type() == PQNodeRoot::QNode)
{
firstSon = checkNode->getEndmost(RIGHT);
// By this, we make sure that we start on the left side
// since the left endmost child will be on top of the stack
}
if (firstSon->status() == INDICATOR)
{
keys.pushBack((PQBasicKey<edge,indInfo*,bool>*) firstSon->getNodeInfo());
}
else
S.push(firstSon);
PQNode<edge,indInfo*,bool> *nextSon = firstSon->getNextSib(0);
PQNode<edge,indInfo*,bool> *oldSib = firstSon;
while (nextSon && nextSon != firstSon)
{
if (nextSon->status() == INDICATOR)
keys.pushBack((PQBasicKey<edge,indInfo*,bool>*) nextSon->getNodeInfo());
else
S.push(nextSon);
PQNode<edge,indInfo*,bool> *holdSib = nextSon->getNextSib(oldSib);
oldSib = nextSon;
nextSon = holdSib;
}
}
}
}
// The function front scans the frontier of nodePtr. It returns the keys
// of the leaves found in the frontier of nodePtr in a SListPure.
// These keys include keys of direction indicators detected in the frontier.
//
// No direction is assigned to the direction indicators.
//
void EmbedPQTree::getFront(
PQNode<edge,IndInfo*,bool>* nodePtr,
SListPure<PQBasicKey<edge,IndInfo*,bool>*> &keys)
{
ArrayBuffer<PQNode<edge,IndInfo*,bool>*> S;
S.push(nodePtr);
while (!S.empty())
{
PQNode<edge,IndInfo*,bool> *checkNode = S.popRet();
if (checkNode->type() == PQNodeRoot::PQNodeType::Leaf)
keys.pushBack((PQBasicKey<edge,IndInfo*,bool>*) checkNode->getKey());
else
{
PQNode<edge,IndInfo*,bool>* firstSon = nullptr;
if (checkNode->type() == PQNodeRoot::PQNodeType::PNode)
{
firstSon = checkNode->referenceChild();
}
else if (checkNode->type() == PQNodeRoot::PQNodeType::QNode)
{
firstSon = checkNode->getEndmost(PQNodeRoot::SibDirection::Right);
// By this, we make sure that we start on the left side
// since the left endmost child will be on top of the stack
}
if (firstSon->status() == PQNodeRoot::PQNodeStatus::Indicator)
{
keys.pushBack((PQBasicKey<edge,IndInfo*,bool>*) firstSon->getNodeInfo());
}
else
S.push(firstSon);
PQNode<edge,IndInfo*,bool> *nextSon = firstSon->getNextSib(nullptr);
PQNode<edge,IndInfo*,bool> *oldSib = firstSon;
while (nextSon && nextSon != firstSon)
{
if (nextSon->status() == PQNodeRoot::PQNodeStatus::Indicator)
keys.pushBack((PQBasicKey<edge,IndInfo*,bool>*) nextSon->getNodeInfo());
else
S.push(nextSon);
PQNode<edge,IndInfo*,bool> *holdSib = nextSon->getNextSib(oldSib);
oldSib = nextSon;
nextSon = holdSib;
}
}
}
}
// The function front scans the frontier of nodePtr. It returns the keys
// of the leaves found in the frontier of nodePtr in a SListPure.
// These keys include keys of direction indicators detected in the frontier.
//
// CAREFUL: Funktion marks all full nodes for destruction.
// Only to be used in connection with replaceRoot.
//
void EmbedPQTree::front(
PQNode<edge,indInfo*,bool>* nodePtr,
SListPure<PQBasicKey<edge,indInfo*,bool>*> &keys)
{
Stack<PQNode<edge,indInfo*,bool>*> S;
S.push(nodePtr);
while (!S.empty())
{
PQNode<edge,indInfo*,bool> *checkNode = S.pop();
if (checkNode->type() == PQNodeRoot::leaf)
keys.pushBack((PQBasicKey<edge,indInfo*,bool>*) checkNode->getKey());
else
{
PQNode<edge,indInfo*,bool>* firstSon = 0;
if (checkNode->type() == PQNodeRoot::PNode)
{
firstSon = checkNode->referenceChild();
}
else if (checkNode->type() == PQNodeRoot::QNode)
{
firstSon = checkNode->getEndmost(RIGHT);
// By this, we make sure that we start on the left side
// since the left endmost child will be on top of the stack
}
if (firstSon->status() == INDICATOR)
{
keys.pushBack((PQBasicKey<edge,indInfo*,bool>*) firstSon->getNodeInfo());
m_pertinentNodes->pushBack(firstSon);
destroyNode(firstSon);
}
else
S.push(firstSon);
PQNode<edge,indInfo*,bool> *nextSon = firstSon->getNextSib(0);
PQNode<edge,indInfo*,bool> *oldSib = firstSon;
while (nextSon && nextSon != firstSon)
{
if (nextSon->status() == INDICATOR)
{
// Direction indicators point with their left sibling pointer
// in the direction of their sequence. If an indicator is scanned
// from the opposite direction, coming from its right sibling
// the corresponding sequence must be reversed.
if (oldSib == nextSon->getSib(LEFT)) //Direction changed
nextSon->getNodeInfo()->userStructInfo()->changeDir = true;
keys.pushBack((PQBasicKey<edge,indInfo*,bool>*) nextSon->getNodeInfo());
m_pertinentNodes->pushBack(nextSon);
}
else
S.push(nextSon);
PQNode<edge,indInfo*,bool> *holdSib = nextSon->getNextSib(oldSib);
oldSib = nextSon;
nextSon = holdSib;
}
}
}
}