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calcDepthFromSource: only take one copy of the graph

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Alex Coyte 2016-12-02 16:02:09 +11:00 committed by Matthew Barr
parent 582f71c5bb
commit 8b7b06d2a4
1 changed files with 17 additions and 15 deletions
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32
src/nfagraph/ng_depth.cpp
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@ -162,13 +162,13 @@ void findLoopReachable(const GraphT &g,
template <class GraphT>
static
void calcDepthFromSource(const NGHolder &graph, const GraphT &g,
void calcDepthFromSource(const GraphT &g,
typename GraphT::vertex_descriptor srcVertex,
const vector<bool> &deadNodes,
vector<int> &dMin, vector<int> &dMax) {
const vector<bool> &deadNodes, vector<int> &dMin,
vector<int> &dMax) {
typedef typename GraphT::edge_descriptor EdgeT;
const size_t numVerts = num_vertices(graph);
const size_t numVerts = num_vertices(g);
NodeFilter<GraphT> nf(&deadNodes, &g);
StartFilter<GraphT> sf(&g);
@ -252,14 +252,14 @@ DepthMinMax getDepths(u32 idx, const vector<int> &dMin,
template<class Graph, class Output>
static
void calcAndStoreDepth(const NGHolder &h, const Graph &g,
void calcAndStoreDepth(const Graph &g,
const typename Graph::vertex_descriptor src,
const vector<bool> &deadNodes,
vector<int> &dMin /* util */,
vector<int> &dMax /* util */,
vector<Output> &depths,
DepthMinMax Output::*store) {
calcDepthFromSource(h, g, src, deadNodes, dMin, dMax);
calcDepthFromSource(g, src, deadNodes, dMin, dMax);
for (auto v : vertices_range(g)) {
u32 idx = g[v].index;
@ -286,10 +286,10 @@ void calcDepths(const NGHolder &g, std::vector<NFAVertexDepth> &depths) {
findLoopReachable(g, g.start, deadNodes);
DEBUG_PRINTF("doing start\n");
calcAndStoreDepth(g, g, g.start, deadNodes, dMin, dMax, depths,
calcAndStoreDepth(g, g.start, deadNodes, dMin, dMax, depths,
&NFAVertexDepth::fromStart);
DEBUG_PRINTF("doing startds\n");
calcAndStoreDepth(g, g, g.startDs, deadNodes, dMin, dMax, depths,
calcAndStoreDepth(g, g.startDs, deadNodes, dMin, dMax, depths,
&NFAVertexDepth::fromStartDotStar);
}
@ -306,6 +306,8 @@ void calcDepths(const NGHolder &g, std::vector<NFAVertexRevDepth> &depths) {
typedef reverse_graph<NGHolder, const NGHolder &> RevNFAGraph;
const RevNFAGraph rg(g);
assert(num_vertices(g) == num_vertices(rg));
/*
* create a filtered graph for max depth calculations: all nodes/edges
* reachable from a loop need to be removed
@ -315,12 +317,12 @@ void calcDepths(const NGHolder &g, std::vector<NFAVertexRevDepth> &depths) {
DEBUG_PRINTF("doing accept\n");
calcAndStoreDepth<RevNFAGraph, NFAVertexRevDepth>(
g, rg, g.accept, deadNodes, dMin, dMax, depths,
rg, g.accept, deadNodes, dMin, dMax, depths,
&NFAVertexRevDepth::toAccept);
DEBUG_PRINTF("doing accepteod\n");
deadNodes[NODE_ACCEPT] = true; // Hide accept->acceptEod edge.
calcAndStoreDepth<RevNFAGraph, NFAVertexRevDepth>(
g, rg, g.acceptEod, deadNodes, dMin, dMax, depths,
rg, g.acceptEod, deadNodes, dMin, dMax, depths,
&NFAVertexRevDepth::toAcceptEod);
}
@ -342,11 +344,11 @@ void calcDepths(const NGHolder &g, vector<NFAVertexBidiDepth> &depths) {
DEBUG_PRINTF("doing start\n");
calcAndStoreDepth<NGHolder, NFAVertexBidiDepth>(
g, g, g.start, deadNodes, dMin, dMax, depths,
g, g.start, deadNodes, dMin, dMax, depths,
&NFAVertexBidiDepth::fromStart);
DEBUG_PRINTF("doing startds\n");
calcAndStoreDepth<NGHolder, NFAVertexBidiDepth>(
g, g, g.startDs, deadNodes, dMin, dMax, depths,
g, g.startDs, deadNodes, dMin, dMax, depths,
&NFAVertexBidiDepth::fromStartDotStar);
/* Now go backwards */
@ -357,12 +359,12 @@ void calcDepths(const NGHolder &g, vector<NFAVertexBidiDepth> &depths) {
DEBUG_PRINTF("doing accept\n");
calcAndStoreDepth<RevNFAGraph, NFAVertexBidiDepth>(
g, rg, g.accept, deadNodes, dMin, dMax, depths,
rg, g.accept, deadNodes, dMin, dMax, depths,
&NFAVertexBidiDepth::toAccept);
DEBUG_PRINTF("doing accepteod\n");
deadNodes[NODE_ACCEPT] = true; // Hide accept->acceptEod edge.
calcAndStoreDepth<RevNFAGraph, NFAVertexBidiDepth>(
g, rg, g.acceptEod, deadNodes, dMin, dMax, depths,
rg, g.acceptEod, deadNodes, dMin, dMax, depths,
&NFAVertexBidiDepth::toAcceptEod);
}
@ -375,7 +377,7 @@ void calcDepthsFrom(const NGHolder &g, const NFAVertex src,
findLoopReachable(g, g.start, deadNodes);
vector<int> dMin, dMax;
calcDepthFromSource(g, g, src, deadNodes, dMin, dMax);
calcDepthFromSource(g, src, deadNodes, dMin, dMax);
depths.clear();
depths.resize(numVertices);