void C_DirectedGraph::getNodesInvolvedInCircularities (TC_UniqueArray <uint32_t> & outNodes) const {
outNodes.setCountToZero () ;
//--- Get working copies
TC_UniqueArray <bool> nodes ; getNodeBoolArray (nodes) ;
TC_UniqueArray <uint32_t> successorCount ;
TC_UniqueArray <uint32_t> predecessorCount ;
for (int32_t i=0 ; i<mEdges.count () ; i++) {
successorCount.appendObject (mEdges (i COMMA_HERE).count ()) ;
}
for (int32_t i=0 ; i<mReverseEdges.count () ; i++) {
predecessorCount.appendObject (mReverseEdges (i COMMA_HERE).count ()) ;
}
//--- Eliminate nodes that have no successor or no predecessor
bool loop = true ;
while (loop) {
loop = false ;
for (int32_t i=0 ; i<nodes.count () ; i++) {
if (nodes (i COMMA_HERE) && ((successorCount (i COMMA_HERE) == 0) || (predecessorCount (i COMMA_HERE) == 0))) {
loop = true ;
nodes.setObjectAtIndex (false, i COMMA_HERE) ;
TC_UniqueArray <uint32_t> s ; mEdges (i COMMA_HERE).getValueArray (s) ;
for (int32_t j=0 ; j<s.count () ; j++) {
predecessorCount.decrementAtIndex ((int32_t) s (j COMMA_HERE) COMMA_HERE) ;
}
mReverseEdges (i COMMA_HERE).getValueArray (s) ;
for (int32_t j=0 ; j<s.count () ; j++) {
successorCount.decrementAtIndex ((int32_t) s (j COMMA_HERE) COMMA_HERE) ;
}
}
}
}
//--- Add circular nodes
for (int32_t i=0 ; i<nodes.count () ; i++) {
if (nodes (i COMMA_HERE)) {
outNodes.appendObject ((uint32_t) i) ;
}
}
}
void C_DirectedGraph::depthFirstTopologicalSort (TC_UniqueArray <uint32_t> & outSortedNodes,
TC_UniqueArray <uint32_t> & outUnsortedNodes) const {
outSortedNodes.setCountToZero () ;
outUnsortedNodes.setCountToZero () ;
//--- Get working copies
TC_UniqueArray <bool> nodes ; getNodeBoolArray (nodes) ;
TC_UniqueArray <uint32_t> dependencyCount (mReverseEdges.count (), 0 COMMA_HERE) ;
for (int32_t i=0 ; i<mReverseEdges.count () ; i++) {
TC_UniqueArray <uint32_t> s ; mReverseEdges (i COMMA_HERE).getValueArray (s) ;
for (int32_t j=0 ; j<s.count () ; j++) {
dependencyCount.incrementAtIndex ((int32_t) s (j COMMA_HERE) COMMA_HERE) ;
}
}
//--- Loop
TC_UniqueArray <uint32_t> workingArray ;
TC_UniqueArray <uint32_t> s ;
bool loop = true ;
while (loop) {
//--- Find a node without any dependence
for (int32_t i=0 ; (i<dependencyCount.count ()) && (workingArray.count () == 0) ; i++) {
if (nodes (i COMMA_HERE) && (dependencyCount (i COMMA_HERE) == 0)) {
nodes.setObjectAtIndex (false, i COMMA_HERE) ;
workingArray.appendObject ((uint32_t) i) ;
}
}
loop = workingArray.count () > 0 ;
if (loop) {
const uint32_t node = workingArray.lastObject (HERE) ;
workingArray.removeLastObject (HERE) ;
outSortedNodes.appendObject (node) ;
mReverseEdges ((int32_t) node COMMA_HERE).getValueArray (s) ;
for (int32_t j=0 ; j<s.count () ; j++) {
const uint32_t candidate = s (j COMMA_HERE) ;
dependencyCount.decrementAtIndex ((int32_t) candidate COMMA_HERE) ;
if (dependencyCount ((int32_t) candidate COMMA_HERE) == 0) {
workingArray.appendObject (candidate) ;
nodes.setObjectAtIndex (false, (int32_t) candidate COMMA_HERE) ;
}
}
}
}
//--- Add unusorted nodes
for (int32_t i=0 ; i<nodes.count () ; i++) {
if (nodes (i COMMA_HERE)) {
outUnsortedNodes.appendObject ((uint32_t) i) ;
}
}
}
void C_DirectedGraph::topologicalSort (TC_UniqueArray <uint32_t> & outSortedNodes,
TC_UniqueArray <uint32_t> & outUnsortedNodes) const {
outSortedNodes.setCountToZero () ;
outUnsortedNodes.setCountToZero () ;
//--- Get working copies
TC_UniqueArray <bool> nodes ; getNodeBoolArray (nodes) ;
TC_UniqueArray <uint32_t> dependencyCount (mReverseEdges.count (), 0 COMMA_HERE) ;
for (int32_t i=0 ; i<mReverseEdges.count () ; i++) {
TC_UniqueArray <uint32_t> s ; mReverseEdges (i COMMA_HERE).getValueArray (s) ;
for (int32_t j=0 ; j<s.count () ; j++) {
dependencyCount.incrementAtIndex ((int32_t) s (j COMMA_HERE) COMMA_HERE) ;
}
}
//--- Loop
bool loop = true ;
TC_UniqueArray <uint32_t> s ;
while (loop) {
loop = false ;
for (int32_t i=0 ; i<nodes.count () ; i++) {
if (nodes (i COMMA_HERE) && (dependencyCount (i COMMA_HERE) == 0)) {
loop = true ;
outSortedNodes.appendObject ((uint32_t) i) ;
nodes.setObjectAtIndex (false, i COMMA_HERE) ;
mReverseEdges (i COMMA_HERE).getValueArray (s) ;
for (int32_t j=0 ; j<s.count () ; j++) {
dependencyCount.decrementAtIndex ((int32_t) s (j COMMA_HERE) COMMA_HERE) ;
}
}
}
}
//--- Add unusorted nodes
for (int32_t i=0 ; i<nodes.count () ; i++) {
if (nodes (i COMMA_HERE)) {
outUnsortedNodes.appendObject ((uint32_t) i) ;
}
}
}