Windows Included

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+/* $Id: ClpNode.hpp 1910 2013-01-27 02:00:13Z stefan $ */
+// Copyright (C) 2008, International Business Machines
+// Corporation and others.  All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef ClpNode_H
+#define ClpNode_H
+
+#include "CoinPragma.hpp"
+
+// This implements all stuff for Clp fathom
+/** This contains what is in a Clp "node"
+
+ */
+
+class ClpFactorization;
+class ClpDualRowSteepest;
+class ClpNodeStuff;
+class ClpNode {
+
+public:
+     /**@name Useful methods */
+     //@{
+     /** Applies node to model
+         0 - just tree bounds
+         1 - tree bounds and basis etc
+         2 - saved bounds and basis etc
+     */
+     void applyNode(ClpSimplex * model, int doBoundsEtc );
+     /// Choose a new variable
+     void chooseVariable(ClpSimplex * model, ClpNodeStuff * info);
+     /// Fix on reduced costs
+     int fixOnReducedCosts(ClpSimplex * model);
+     /// Create odd arrays
+     void createArrays(ClpSimplex * model);
+     /// Clean up as crunch is different model
+     void cleanUpForCrunch();
+     //@}
+
+     /**@name Gets and sets */
+     //@{
+     /// Objective value
+     inline double objectiveValue() const {
+          return objectiveValue_;
+     }
+     /// Set objective value
+     inline void setObjectiveValue(double value) {
+          objectiveValue_ = value;
+     }
+     /// Primal solution
+     inline const double * primalSolution() const {
+          return primalSolution_;
+     }
+     /// Dual solution
+     inline const double * dualSolution() const {
+          return dualSolution_;
+     }
+     /// Initial value of integer variable
+     inline double branchingValue() const {
+          return branchingValue_;
+     }
+     /// Sum infeasibilities
+     inline double sumInfeasibilities() const {
+          return sumInfeasibilities_;
+     }
+     /// Number infeasibilities
+     inline int numberInfeasibilities() const {
+          return numberInfeasibilities_;
+     }
+     /// Relative depth
+     inline int depth() const {
+          return depth_;
+     }
+     /// Estimated solution value
+     inline double estimatedSolution() const {
+          return estimatedSolution_;
+     }
+     /** Way for integer variable -1 down , +1 up */
+     int way() const;
+     /// Return true if branch exhausted
+     bool fathomed() const;
+     /// Change state of variable i.e. go other way
+     void changeState();
+     /// Sequence number of integer variable (-1 if none)
+     inline int sequence() const {
+          return sequence_;
+     }
+     /// If odd arrays exist
+     inline bool oddArraysExist() const {
+          return lower_ != NULL;
+     }
+     /// Status array
+     inline const unsigned char * statusArray() const {
+          return status_;
+     }
+     //@}
+
+     /**@name Constructors, destructor */
+     //@{
+     /** Default constructor. */
+     ClpNode();
+     /// Constructor from model
+     ClpNode (ClpSimplex * model, const ClpNodeStuff * stuff, int depth);
+     /// Does work of constructor (partly so gdb will work)
+     void gutsOfConstructor(ClpSimplex * model, const ClpNodeStuff * stuff,
+                            int arraysExist, int depth);
+     /** Destructor */
+     virtual ~ClpNode();
+     //@}
+
+     /**@name Copy methods (at present illegal - will abort) */
+     //@{
+     /** The copy constructor. */
+     ClpNode(const ClpNode&);
+     /// Operator =
+     ClpNode& operator=(const ClpNode&);
+     //@}
+
+protected:
+// For state of branch
+     typedef struct {
+          unsigned int firstBranch: 1; //  nonzero if first branch on variable is up
+          unsigned int branch: 2; //  0 means do first branch next, 1 second, 2 finished
+          unsigned int spare: 29;
+     } branchState;
+     /**@name Data */
+     //@{
+     /// Initial value of integer variable
+     double branchingValue_;
+     /// Value of objective
+     double objectiveValue_;
+     /// Sum of infeasibilities
+     double sumInfeasibilities_;
+     /// Estimated solution value
+     double estimatedSolution_;
+     /// Factorization
+     ClpFactorization * factorization_;
+     /// Steepest edge weights
+     ClpDualRowSteepest * weights_;
+     /// Status vector
+     unsigned char * status_;
+     /// Primal solution
+     double * primalSolution_;
+     /// Dual solution
+     double * dualSolution_;
+     /// Integer lower bounds (only used in fathomMany)
+     int * lower_;
+     /// Integer upper bounds (only used in fathomMany)
+     int * upper_;
+     /// Pivot variables for factorization
+     int * pivotVariables_;
+     /// Variables fixed by reduced costs (at end of branch) 0x10000000 added if fixed to UB
+     int * fixed_;
+     /// State of branch
+     branchState branchState_;
+     /// Sequence number of integer variable (-1 if none)
+     int sequence_;
+     /// Number of infeasibilities
+     int numberInfeasibilities_;
+     /// Relative depth
+     int depth_;
+     /// Number fixed by reduced cost
+     int numberFixed_;
+     /// Flags - 1 duals scaled
+     int flags_;
+     /// Maximum number fixed by reduced cost
+     int maximumFixed_;
+     /// Maximum rows so far
+     int maximumRows_;
+     /// Maximum columns so far
+     int maximumColumns_;
+     /// Maximum Integers so far
+     int maximumIntegers_;
+     //@}
+};
+class ClpNodeStuff {
+
+public:
+     /**@name Constructors, destructor */
+     //@{
+     /** Default constructor. */
+     ClpNodeStuff();
+     /** Destructor */
+     virtual ~ClpNodeStuff();
+     //@}
+
+     /**@name Copy methods (only copies ints etc, nulls arrays) */
+     //@{
+     /** The copy constructor. */
+     ClpNodeStuff(const ClpNodeStuff&);
+     /// Operator =
+     ClpNodeStuff& operator=(const ClpNodeStuff&);
+     /// Zaps stuff 1 - arrays, 2 ints, 3 both
+     void zap(int type);
+     //@}
+
+
+     /**@name Fill methods */
+     //@{
+     /** Fill with pseudocosts */
+     void fillPseudoCosts(const double * down, const double * up,
+                          const int * priority,
+                          const int * numberDown, const int * numberUp,
+                          const int * numberDownInfeasible, const int * numberUpInfeasible,
+                          int number);
+     /// Update pseudo costs
+     void update(int way, int sequence, double change, bool feasible);
+     /// Return maximum number of nodes
+     int maximumNodes() const;
+     /// Return maximum space for nodes
+     int maximumSpace() const;
+     //@}
+
+public:
+     /**@name Data */
+     //@{
+     /// Integer tolerance
+     double integerTolerance_;
+     /// Integer increment
+     double integerIncrement_;
+     /// Small change in branch
+     double smallChange_;
+     /// Down pseudo costs
+     double * downPseudo_;
+     /// Up pseudo costs
+     double * upPseudo_;
+     /// Priority
+     int * priority_;
+     /// Number of times down
+     int * numberDown_;
+     /// Number of times up
+     int * numberUp_;
+     /// Number of times down infeasible
+     int * numberDownInfeasible_;
+     /// Number of times up infeasible
+     int * numberUpInfeasible_;
+     /// Copy of costs (local)
+     double * saveCosts_;
+     /// Array of ClpNodes
+     ClpNode ** nodeInfo_;
+     /// Large model if crunched
+     ClpSimplex * large_;
+     /// Which rows in large model
+     int * whichRow_;
+     /// Which columns in large model
+     int * whichColumn_;
+#ifndef NO_FATHOM_PRINT
+     /// Cbc's message handler
+     CoinMessageHandler * handler_;
+#endif
+     /// Number bounds in large model
+     int nBound_;
+     /// Save of specialOptions_ (local)
+     int saveOptions_;
+     /** Options to pass to solver
+         1 - create external reduced costs for columns
+         2 - create external reduced costs for rows
+         4 - create external row activity (columns always done)
+         Above only done if feasible
+         32 - just create up to nDepth_+1 nodes
+         65536 - set if activated
+     */
+     int solverOptions_;
+     /// Maximum number of nodes to do
+     int maximumNodes_;
+     /// Number before trust from CbcModel
+     int numberBeforeTrust_;
+     /// State of search from CbcModel
+     int stateOfSearch_;
+     /// Number deep
+     int nDepth_;
+     /// Number nodes returned (-1 if fathom aborted)
+     int nNodes_;
+     /// Number of nodes explored
+     int numberNodesExplored_;
+     /// Number of iterations
+     int numberIterations_;
+     /// Type of presolve - 0 none, 1 crunch
+     int presolveType_;
+#ifndef NO_FATHOM_PRINT
+     /// Depth passed in
+     int startingDepth_;
+     /// Node at which called
+     int nodeCalled_;
+#endif
+     //@}
+};
+class ClpHashValue {
+
+public:
+     /**@name Useful methods */
+     //@{
+     /// Return index or -1 if not found
+     int index(double value) const;
+     /// Add value to list and return index
+     int addValue(double value) ;
+     /// Number of different entries
+     inline int numberEntries() const {
+          return numberHash_;
+     }
+     //@}
+
+     /**@name Constructors, destructor */
+     //@{
+     /** Default constructor. */
+     ClpHashValue();
+     /** Useful constructor. */
+     ClpHashValue(ClpSimplex * model);
+     /** Destructor */
+     virtual ~ClpHashValue();
+     //@}
+
+     /**@name Copy method */
+     //@{
+     /** The copy constructor. */
+     ClpHashValue(const ClpHashValue&);
+     /// =
+     ClpHashValue& operator=(const ClpHashValue&);
+     //@}
+private:
+     /**@name private stuff */
+     //@{
+     /** returns hash */
+     int hash(double value) const;
+     /// Resizes
+     void resize(bool increaseMax);
+     //@}
+
+protected:
+     /**@name Data members
+        The data members are protected to allow access for derived classes. */
+     //@{
+     /// Data
+     // for hashing
+     typedef struct {
+          double value;
+          int index, next;
+     } CoinHashLink;
+     /// Hash table
+     mutable CoinHashLink *hash_;
+     /// Number of entries in hash table
+     int numberHash_;
+     /// Maximum number of entries in hash table i.e. size
+     int maxHash_;
+     /// Last used space
+     int lastUsed_;
+     //@}
+};
+#endif