#include "order.h"
OrderGraph::OrderGraph(Order *_order) :
- nodes(new HashsetOrderNode()),
- edges(new HashsetOrderEdge()),
order(_order) {
}
OrderNode *OrderGraph::getOrderNodeFromOrderGraph(uint64_t id) {
OrderNode *node = new OrderNode(id);
- OrderNode *tmp = nodes->get(node);
+ OrderNode *tmp = nodes.get(node);
if ( tmp != NULL) {
delete node;
node = tmp;
} else {
- nodes->add(node);
+ nodes.add(node);
+ allNodes.push(node);
}
return node;
}
OrderNode *OrderGraph::lookupOrderNodeFromOrderGraph(uint64_t id) {
OrderNode node(id);
- OrderNode *tmp = nodes->get(&node);
+ OrderNode *tmp = nodes.get(&node);
return tmp;
}
OrderEdge *OrderGraph::getOrderEdgeFromOrderGraph(OrderNode *begin, OrderNode *end) {
OrderEdge *edge = new OrderEdge(begin, end);
- OrderEdge *tmp = edges->get(edge);
+ OrderEdge *tmp = edges.get(edge);
if ( tmp != NULL ) {
delete edge;
edge = tmp;
} else {
- edges->add(edge);
+ edges.add(edge);
}
return edge;
}
OrderEdge *OrderGraph::lookupOrderEdgeFromOrderGraph(OrderNode *begin, OrderNode *end) {
OrderEdge edge(begin, end);
- OrderEdge *tmp = edges->get(&edge);
+ OrderEdge *tmp = edges.get(&edge);
return tmp;
}
OrderEdge *OrderGraph::getInverseOrderEdge(OrderEdge *edge) {
OrderEdge inverseedge(edge->sink, edge->source);
- OrderEdge *tmp = edges->get(&inverseedge);
+ OrderEdge *tmp = edges.get(&inverseedge);
return tmp;
}
}
OrderGraph::~OrderGraph() {
- SetIteratorOrderNode *iterator = nodes->iterator();
- while (iterator->hasNext()) {
- OrderNode *node = iterator->next();
- delete node;
- }
- delete iterator;
+ uint size=allNodes.getSize();
+ for(uint i=0;i<size;i++)
+ delete allNodes.get(i);
- SetIteratorOrderEdge *eiterator = edges->iterator();
+ SetIteratorOrderEdge *eiterator = edges.iterator();
while (eiterator->hasNext()) {
OrderEdge *edge = eiterator->next();
delete edge;
}
delete eiterator;
- delete nodes;
- delete edges;
}
bool OrderGraph::isTherePath(OrderNode *source, OrderNode *destination) {
delete iterator;
return found;
}
+
+void OrderGraph::DFS(Vector<OrderNode *> *finishNodes) {
+ SetIteratorOrderNode *iterator = getNodes();
+ while (iterator->hasNext()) {
+ OrderNode *node = iterator->next();
+ if (node->status == NOTVISITED) {
+ node->status = VISITED;
+ DFSNodeVisit(node, finishNodes, false, false, 0);
+ node->status = FINISHED;
+ finishNodes->push(node);
+ }
+ }
+ delete iterator;
+}
+
+void OrderGraph::DFSMust(Vector<OrderNode *> *finishNodes) {
+ SetIteratorOrderNode *iterator = getNodes();
+ while (iterator->hasNext()) {
+ OrderNode *node = iterator->next();
+ if (node->status == NOTVISITED) {
+ node->status = VISITED;
+ DFSNodeVisit(node, finishNodes, false, true, 0);
+ node->status = FINISHED;
+ finishNodes->push(node);
+ }
+ }
+ delete iterator;
+}
+
+void OrderGraph::DFSReverse(Vector<OrderNode *> *finishNodes) {
+ uint size = finishNodes->getSize();
+ uint sccNum = 1;
+ for (int i = size - 1; i >= 0; i--) {
+ OrderNode *node = finishNodes->get(i);
+ if (node->status == NOTVISITED) {
+ node->status = VISITED;
+ DFSNodeVisit(node, NULL, true, false, sccNum);
+ node->sccNum = sccNum;
+ node->status = FINISHED;
+ sccNum++;
+ }
+ }
+}
+
+void OrderGraph::DFSNodeVisit(OrderNode *node, Vector<OrderNode *> *finishNodes, bool isReverse, bool mustvisit, uint sccNum) {
+ SetIteratorOrderEdge *iterator = isReverse ? node->inEdges.iterator() : node->outEdges.iterator();
+ while (iterator->hasNext()) {
+ OrderEdge *edge = iterator->next();
+ if (mustvisit) {
+ if (!edge->mustPos)
+ continue;
+ } else
+ if (!edge->polPos && !edge->pseudoPos) //Ignore edges that do not have positive polarity
+ continue;
+
+ OrderNode *child = isReverse ? edge->source : edge->sink;
+ if (child->status == NOTVISITED) {
+ child->status = VISITED;
+ DFSNodeVisit(child, finishNodes, isReverse, mustvisit, sccNum);
+ child->status = FINISHED;
+ if (finishNodes != NULL) {
+ finishNodes->push(child);
+ }
+ if (isReverse)
+ child->sccNum = sccNum;
+ }
+ }
+ delete iterator;
+}
+
+void OrderGraph::resetNodeInfoStatusSCC() {
+ SetIteratorOrderNode *iterator = getNodes();
+ while (iterator->hasNext()) {
+ iterator->next()->status = NOTVISITED;
+ }
+ delete iterator;
+}
+
+void OrderGraph::computeStronglyConnectedComponentGraph() {
+ Vector<OrderNode *> finishNodes;
+ DFS(&finishNodes);
+ resetNodeInfoStatusSCC();
+ DFSReverse(&finishNodes);
+ resetNodeInfoStatusSCC();
+}
+
+/** This function computes a source set for every nodes, the set of
+ nodes that can reach that node via pospolarity edges. It then
+ looks for negative polarity edges from nodes in the the source set
+ to determine whether we need to generate pseudoPos edges. */
+
+void OrderGraph::completePartialOrderGraph() {
+ Vector<OrderNode *> finishNodes;
+ DFS(&finishNodes);
+ resetNodeInfoStatusSCC();
+ HashtableNodeToNodeSet *table = new HashtableNodeToNodeSet(128, 0.25);
+
+ Vector<OrderNode *> sccNodes;
+
+ uint size = finishNodes.getSize();
+ uint sccNum = 1;
+ for (int i = size - 1; i >= 0; i--) {
+ OrderNode *node = finishNodes.get(i);
+ HashsetOrderNode *sources = new HashsetOrderNode(4, 0.25);
+ table->put(node, sources);
+
+ if (node->status == NOTVISITED) {
+ //Need to do reverse traversal here...
+ node->status = VISITED;
+ DFSNodeVisit(node, &sccNodes, true, false, sccNum);
+ node->status = FINISHED;
+ node->sccNum = sccNum;
+ sccNum++;
+ sccNodes.push(node);
+
+ //Compute in set for entire SCC
+ uint rSize = sccNodes.getSize();
+ for (uint j = 0; j < rSize; j++) {
+ OrderNode *rnode = sccNodes.get(j);
+ //Compute source sets
+ SetIteratorOrderEdge *iterator = rnode->inEdges.iterator();
+ while (iterator->hasNext()) {
+ OrderEdge *edge = iterator->next();
+ OrderNode *parent = edge->source;
+ if (edge->polPos) {
+ sources->add(parent);
+ HashsetOrderNode *parent_srcs = (HashsetOrderNode *)table->get(parent);
+ sources->addAll(parent_srcs);
+ }
+ }
+ delete iterator;
+ }
+ for (uint j = 0; j < rSize; j++) {
+ //Copy in set of entire SCC
+ OrderNode *rnode = sccNodes.get(j);
+ HashsetOrderNode *set = (j == 0) ? sources : sources->copy();
+ table->put(rnode, set);
+
+ //Use source sets to compute pseudoPos edges
+ SetIteratorOrderEdge *iterator = node->inEdges.iterator();
+ while (iterator->hasNext()) {
+ OrderEdge *edge = iterator->next();
+ OrderNode *parent = edge->source;
+ ASSERT(parent != rnode);
+ if (edge->polNeg && parent->sccNum != rnode->sccNum &&
+ sources->contains(parent)) {
+ OrderEdge *newedge = getOrderEdgeFromOrderGraph(rnode, parent);
+ newedge->pseudoPos = true;
+ }
+ }
+ delete iterator;
+ }
+
+ sccNodes.clear();
+ }
+ }
+
+ table->resetAndDeleteVals();
+ delete table;
+ resetNodeInfoStatusSCC();
+}
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