sparse example

Sparse use case.

Description

This example shows how to get a sparse variable and return it to Scilab.

Gateway Source

#include "api_scilab.h"
int sparseExample(char *fname,unsigned long fname_len)
{
    SciErr sciErr;
    int* piAddr = NULL;
    int iType   = 0;
    int iRet    = 0;

    CheckInputArgument(pvApiCtx, 1, 1);
    CheckOutputArgument(pvApiCtx, 0, 1);

    sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr);
    if(sciErr.iErr)
    {
            printError(&sciErr, 0);
            return 0;
    }

    if(isSparseType(pvApiCtx, piAddr))
    {
            int iRows           = 0;
            int iCols           = 0;
            int iNbItem         = 0;
            int* piNbItemRow        = NULL;
            int* piColPos       = NULL;
            double* pdblReal        = NULL;
            double* pdblImg         = NULL;

            if(isVarComplex(pvApiCtx, piAddr))
            {
                    iRet = getAllocatedComplexSparseMatrix(pvApiCtx, piAddr, &iRows, &iCols, &iNbItem, &piNbItemRow, &piColPos, &pdblReal, &pdblImg);
                    if(iRet)
                    {
                            freeAllocatedComplexSparseMatrix(piNbItemRow, piColPos, pdblReal, pdblImg);
                            return iRet;
                    }

                    sciErr = createComplexSparseMatrix(pvApiCtx, nbInputArgument + 1, iRows, iCols, iNbItem, piNbItemRow, piColPos, pdblReal, pdblImg);
                    if(sciErr.iErr)
                    {
                            freeAllocatedComplexSparseMatrix(piNbItemRow, piColPos, pdblReal, pdblImg);
                            printError(&sciErr, 0);
                            return sciErr.iErr;
                    }

                    freeAllocatedComplexSparseMatrix(piNbItemRow, piColPos, pdblReal, pdblImg);
            }
            else
            {
                    iRet = getAllocatedSparseMatrix(pvApiCtx, piAddr, &iRows, &iCols, &iNbItem, &piNbItemRow, &piColPos, &pdblReal);
                    if(iRet)
                    {
                            freeAllocatedSparseMatrix(piNbItemRow, piColPos, pdblReal);
                            return iRet;
                    }

                    sciErr = createSparseMatrix(pvApiCtx, nbInputArgument + 1, iRows, iCols, iNbItem, piNbItemRow, piColPos, pdblReal);
                    if(sciErr.iErr)
                    {
                            freeAllocatedSparseMatrix(piNbItemRow, piColPos, pdblReal);
                            printError(&sciErr, 0);
                            return sciErr.iErr;
                    }

                    freeAllocatedSparseMatrix(piNbItemRow, piColPos, pdblReal);
            }
            AssignOutputVariable(1) = nbInputArgument + 1;
    }
    else
    {
            AssignOutputVariable(1) = 0;
    }
    return 0;
}

Scilab test script

a = `sparse`_([1,1;2,2;3,3], [1, 2, 3]);
b = `sparse`_([1,1;2,2;3,3], [1 + 2 * %i, 3 , -4 * %i]);
if sparseExample(a) <> a then pause;end
if sparseExample(b) <> b then pause;end