183 lines
4.0 KiB
C++
183 lines
4.0 KiB
C++
#ifndef HORUS_COUNTINGBP_H
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#define HORUS_COUNTINGBP_H
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#include <unordered_map>
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#include "GroundSolver.h"
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#include "FactorGraph.h"
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#include "Util.h"
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#include "Horus.h"
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class VarCluster;
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class FacCluster;
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class WeightedBp;
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typedef long Color;
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typedef vector<Color> Colors;
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typedef vector<std::pair<Color,unsigned>> VarSignature;
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typedef vector<Color> FacSignature;
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typedef unordered_map<unsigned, Color> DistColorMap;
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typedef unordered_map<unsigned, Colors> VarColorMap;
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typedef unordered_map<VarSignature, VarNodes> VarSignMap;
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typedef unordered_map<FacSignature, FacNodes> FacSignMap;
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typedef unordered_map<VarId, VarCluster*> VarClusterMap;
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typedef vector<VarCluster*> VarClusters;
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typedef vector<FacCluster*> FacClusters;
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template <class T>
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inline size_t hash_combine (size_t seed, const T& v)
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{
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return seed ^ (hash<T>()(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2));
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}
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namespace std {
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template <typename T1, typename T2> struct hash<std::pair<T1,T2>>
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{
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size_t operator() (const std::pair<T1,T2>& p) const
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{
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return hash_combine (std::hash<T1>()(p.first), p.second);
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}
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};
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template <typename T> struct hash<std::vector<T>>
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{
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size_t operator() (const std::vector<T>& vec) const
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{
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size_t h = 0;
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typename vector<T>::const_iterator first = vec.begin();
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typename vector<T>::const_iterator last = vec.end();
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for (; first != last; ++first) {
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h = hash_combine (h, *first);
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}
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return h;
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}
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};
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}
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class VarCluster
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{
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public:
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VarCluster (const VarNodes& vs) : members_(vs) { }
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const VarNode* first (void) const { return members_.front(); }
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const VarNodes& members (void) const { return members_; }
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VarNode* representative (void) const { return repr_; }
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void setRepresentative (VarNode* vn) { repr_ = vn; }
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private:
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VarNodes members_;
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VarNode* repr_;
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};
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class FacCluster
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{
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public:
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FacCluster (const FacNodes& fcs, const VarClusters& vcs)
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: members_(fcs), varClusters_(vcs) { }
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const FacNode* first (void) const { return members_.front(); }
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const FacNodes& members (void) const { return members_; }
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FacNode* representative (void) const { return repr_; }
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void setRepresentative (FacNode* fn) { repr_ = fn; }
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VarClusters& varClusters (void) { return varClusters_; }
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private:
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FacNodes members_;
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FacNode* repr_;
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VarClusters varClusters_;
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};
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class CountingBp : public GroundSolver
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{
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public:
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CountingBp (const FactorGraph& fg);
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~CountingBp (void);
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void printSolverFlags (void) const;
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Params solveQuery (VarIds);
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static bool checkForIdenticalFactors;
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private:
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Color getNewColor (void)
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{
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++ freeColor_;
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return freeColor_ - 1;
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}
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Color getColor (const VarNode* vn) const
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{
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return varColors_[vn->getIndex()];
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}
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Color getColor (const FacNode* fn) const
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{
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return facColors_[fn->getIndex()];
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}
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void setColor (const VarNode* vn, Color c)
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{
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varColors_[vn->getIndex()] = c;
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}
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void setColor (const FacNode* fn, Color c)
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{
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facColors_[fn->getIndex()] = c;
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}
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void findIdenticalFactors (void);
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void setInitialColors (void);
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void createGroups (void);
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void createClusters (const VarSignMap&, const FacSignMap&);
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VarSignature getSignature (const VarNode*);
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FacSignature getSignature (const FacNode*);
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void printGroups (const VarSignMap&, const FacSignMap&) const;
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VarId getRepresentative (VarId vid);
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FacNode* getRepresentative (FacNode*);
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FactorGraph* getCompressedFactorGraph (void);
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vector<vector<unsigned>> getWeights (void) const;
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unsigned getWeight (const FacCluster*,
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const VarCluster*, size_t index) const;
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Color freeColor_;
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Colors varColors_;
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Colors facColors_;
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VarClusters varClusters_;
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FacClusters facClusters_;
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VarClusterMap varClusterMap_;
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const FactorGraph* compressedFg_;
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WeightedBp* solver_;
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};
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#endif // HORUS_COUNTINGBP_H
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