BlisVariable.h

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/*===========================================================================*
 * This file is part of the BiCePS Linear Integer Solver (BLIS).             *
 *                                                                           *
 * BLIS is distributed under the Eclipse Public License as part of the       *
 * COIN-OR repository (http://www.coin-or.org).                              *
 *                                                                           *
 * Authors:                                                                  *
 *                                                                           *
 *          Yan Xu, Lehigh University                                        *
 *          Ted Ralphs, Lehigh University                                    *
 *                                                                           *
 * Conceptual Design:                                                        *
 *                                                                           *
 *          Yan Xu, Lehigh University                                        *
 *          Ted Ralphs, Lehigh University                                    *
 *          Laszlo Ladanyi, IBM T.J. Watson Research Center                  *
 *          Matthew Saltzman, Clemson University                             *
 *                                                                           * 
 *                                                                           *
 * Copyright (C) 2001-2013, Lehigh University, Yan Xu, and Ted Ralphs.       *
 * All Rights Reserved.                                                      *
 *===========================================================================*/

#ifndef BlisVariable_h_
#define BlisVariable_h_

#include "BcpsObject.h"

//#############################################################################

class BlisVariable : public BcpsVariable {

 private:

    double objCoef_;
    int size_;
    int *indices_;
    double *values_;
    
 public:

    BlisVariable() : objCoef_(0.0), size_(0), indices_(NULL), values_(NULL) {}
    
    BlisVariable(double obj, int s, const int *ind, const double *val)
        {
            objCoef_ = obj;
            size_ = s;
            indices_ = new int [s];
            values_ = new double [s];
            memcpy(indices_, ind, s * sizeof(int));
            memcpy(values_, val, s * sizeof(double));
        }
    
    BlisVariable(double lbh, double ubh, double lbs, double ubs) 
        :
        BcpsVariable(lbh, ubh, lbs, ubs),
        objCoef_(0.0),
        size_(0), indices_(NULL), values_(NULL)
        {}

    BlisVariable(double lbh, double ubh, double lbs, double ubs,
                 double obj, int s, const int *ind, const double *val)
        : 
        BcpsVariable(lbh, ubh, lbs, ubs)
        {
            objCoef_ = obj;
            size_ = s;
            indices_ = new int [s];
            values_ = new double [s];
            memcpy(indices_, ind, s * sizeof(int));
            memcpy(values_, val, s * sizeof(double));
        }
    
    virtual ~BlisVariable(){ 
        delete [] indices_; indices_ = NULL;
        delete [] values_; values_ = NULL;
    }
    
    double getObjCoef()    { return objCoef_; }    
    int getSize() const     { return size_; }
    int* getIndices() const { return indices_; }
    double* getValues()     { return values_; }    
    void setData(int s, const int *ind, const double *val) {
        if (size_ < s) {
            delete [] indices_; indices_ = NULL;
            delete [] values_; values_ = NULL;
            indices_ = new int [s];
            values_ = new double [s];
        }
        size_ = s;
        memcpy(indices_, ind, sizeof(int) * s);
        memcpy(values_, val, sizeof(double) * s);
    }
    void setObjCoef(double coef)    { objCoef_ = coef; }    
 protected:

    AlpsReturnStatus encodeBlis(AlpsEncoded *encoded) {
        AlpsReturnStatus status = AlpsReturnStatusOk;

        //std::cout << "****** encodeBlis var: size_ = " << size_ << std::endl;

        encoded->writeRep(objCoef_);
        encoded->writeRep(indices_, size_);
        encoded->writeRep(values_, size_);
        
        return status;
    }    

    AlpsReturnStatus decodeBlis(AlpsEncoded &encoded) {
        AlpsReturnStatus status = AlpsReturnStatusOk;

        encoded.readRep(objCoef_);
        encoded.readRep(indices_, size_);
        encoded.readRep(values_, size_);
        
        //std::cout << "****** decodeBlis var: size_ = " << size_ << std::endl;

        return status;
    }
    
 public:
    
    using AlpsKnowledge::encode ;
    virtual AlpsReturnStatus encode(AlpsEncoded *encoded){
        AlpsReturnStatus status;

        status = encodeBcpsObject(encoded);
        status = encodeBlis(encoded);
        
        return status;
    }

    virtual AlpsKnowledge* decode(AlpsEncoded &encoded) const {
        AlpsReturnStatus status = AlpsReturnStatusOk;
        BlisVariable * var = new BlisVariable();    
        
        // Unpack Bcps part.
        status = var->decodeBcpsObject(encoded);
        if (status) {
            throw CoinError("Failed to decode Bcps part of var",
                            "decode",
                            "BlisObject");
        }
        
        // Unpack Blis part.
        status = var->decodeBlis(encoded);
        if (status) {
            throw CoinError("Failed to decode Blis part of var", 
                            "decode", 
                            "BlisObject");
        }
        return var;
    }
    
};

//#############################################################################

#endif /* End of file */