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/*
* Linear Solver Toolbox for Scilab using CLP library
* Authors :
Guru Pradeep Reddy
Bhanu Priya Sayal
*/
#include "sci_iofunc.hpp"
#include"OsiSolverInterface.hpp"
#include "OsiClpSolverInterface.hpp"
#include "CoinPackedMatrix.hpp"
#include "CoinPackedVector.hpp"
extern "C"{
#include <api_scilab.h>
#include <Scierror.h>
#include <localization.h>
#include <sciprint.h>
//Solver function
int sci_linearprog(char *fname)
{
//Objective function
double* obj;
//Constraint matrix coefficients
double* conMatrix;
//Constraints upper bound
double* conlb;
//Constraints lower bound
double* conub;
//Lower bounds for variables
double* lb;
//Upper bounds for variables
double* ub;
//options for maximum iterations and writing mps
double* options;
//Flag for Mps
double flagMps;
//Error structure in Scilab
SciErr sciErr;
//Number of rows and columns in objective function
int nVars=0, nCons=0,temp1=0,temp2=0;
CheckInputArgument(pvApiCtx , 9 , 9); //Checking the input arguments
CheckOutputArgument(pvApiCtx , 6, 6); //Checking the output arguments
////////// Manage the input argument //////////
//Number of Variables
if(getIntFromScilab(1,&nVars))
{
return 1;
}
//Number of Constraints
if (getIntFromScilab(2,&nCons))
{
return 1;
}
//Objective function from Scilab
temp1 = nVars;
temp2 = nCons;
if (getFixedSizeDoubleMatrixFromScilab(3,1,temp1,&obj))
{
return 1;
}
if (nCons!=0)
{
//conMatrix matrix from scilab
temp1 = nCons;
temp2 = nVars;
if (getFixedSizeDoubleMatrixFromScilab(4,temp1,temp2,&conMatrix))
{
return 1;
}
//conLB matrix from scilab
temp1 = nCons;
temp2 = 1;
if (getFixedSizeDoubleMatrixFromScilab(5,temp1,temp2,&conlb))
{
return 1;
}
//conUB matrix from scilab
if (getFixedSizeDoubleMatrixFromScilab(6,temp1,temp2,&conub))
{
return 1;
}
}
//lb matrix from scilab
temp1 = 1;
temp2 = nVars;
if (getFixedSizeDoubleMatrixFromScilab(7,temp1,temp2,&lb))
{
return 1;
}
//ub matrix from scilab
if (getFixedSizeDoubleMatrixFromScilab(8,temp1,temp2,&ub))
{
return 1;
}
//get options from scilab
if(getFixedSizeDoubleMatrixInList(9 , 2 , 1 , 1 , &options))
{
return 1;
}
OsiSolverInterface* si = new OsiClpSolverInterface();
//Defining the constraint matrix
CoinPackedMatrix *matrix = new CoinPackedMatrix(false , 0 , 0);
matrix->setDimensions(0 , nVars);
for(int i=0 ; i<nCons ; i++)
{
CoinPackedVector row;
for(int j=0 ; j<nVars; j++)
{
row.insert(j, conMatrix[i+j*nCons]);
}
matrix->appendRow(row);
}
//setting options for maximum iterations
si->setIntParam(OsiMaxNumIteration,options[0]);
//Load the problem to OSI
si->loadProblem(*matrix , lb , ub, obj , conlb , conub);
//Solve the problem
si->initialSolve();
//Output the solution to Scilab
//get solution for x
const double* xValue = si->getColSolution();
for(int i=0;i<nVars;i++)
{
sciprint("%lf",xValue[i]);
}
//get objective value
double objValue = si->getObjValue();
//get Status value
double status_ = 0;
if(si->isProvenOptimal())
status_=0;
else if(si->isProvenPrimalInfeasible())
status_=1;
else if(si->isProvenDualInfeasible())
status_=2;
else if(si->isIterationLimitReached())
status_=3;
else if(si->isAbandoned())
status_=4;
else if(si->isPrimalObjectiveLimitReached())
status_=5;
else if(si->isDualObjectiveLimitReached())
status_=6;
//get number of iterations
double iterations = si->getIterationCount();
//get reduced cost
const double* Zl = si->getReducedCost();
//get dual vector
const double* dual = si->getRowPrice();
returnDoubleMatrixToScilab(1 , 1 , nVars , xValue);
returnDoubleMatrixToScilab(2 , 1 , 1 , &objValue);
returnDoubleMatrixToScilab(3 , 1 , 1 , &status_);
returnDoubleMatrixToScilab(4 , 1 , 1 , &iterations);
returnDoubleMatrixToScilab(5 , 1 , nVars , Zl);
returnDoubleMatrixToScilab(6 , 1 , nCons , dual);
}
}
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