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See the recommended documentation of this function

Scilab manual >> API Scilab > polynom > polynom example

polynom example

Polynom use case.

Description

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

Gateway Source

int polyExample(char *fname,unsigned long fname_len)
{
    SciErr sciErr;
    int* piAddr        = NULL;
    int iType            = 0;
    int iRet            = 0;

    CheckRhs(1,1);
    CheckLhs(0,1);

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

    if(isPolyType(pvApiCtx, piAddr))
    {
        char pstVarName[64];
        int iLen        = 0;

        sciErr = getPolyVariableName(pvApiCtx, piAddr, pstVarName, &iLen);
        if(sciErr.iErr)
        {
            printError(&sciErr, 0);
            return sciErr.iErr;
        }

        if(isScalar(pvApiCtx, piAddr))
        {
            int iNbCoef                = 0;
            double* pdblReal    = NULL;
            double* pdblImg        = NULL;

            if(isVarComplex(pvApiCtx, piAddr))
            {
                iRet = getAllocatedSingleComplexPoly(pvApiCtx, piAddr, &iNbCoef, &pdblReal, &pdblImg);
                if(iRet)
                {
                    freeAllocatedSingleComplexPoly(pdblReal, pdblImg);
                    return iRet;
                }

                sciErr = createComplexMatrixOfPoly(pvApiCtx, Rhs + 1, pstVarName, 1, 1, &iNbCoef, &pdblReal, &pdblImg);
                if(sciErr.iErr)
                {
                    freeAllocatedSingleComplexPoly(pdblReal, pdblImg);
                    printError(&sciErr, 0);
                    return sciErr.iErr;
                }
                freeAllocatedSingleComplexPoly(pdblReal, pdblImg);
            }
            else
            {
                iRet = getAllocatedSinglePoly(pvApiCtx, piAddr, &iNbCoef, &pdblReal);
                if(iRet)
                {
                    freeAllocatedSinglePoly(pdblReal);
                    return iRet;
                }

                sciErr = createMatrixOfPoly(pvApiCtx, Rhs + 1, pstVarName, 1, 1, &iNbCoef, &pdblReal);
                if(sciErr.iErr)
                {
                    freeAllocatedSinglePoly(pdblReal);
                    printError(&sciErr, 0);
                    return sciErr.iErr;
                }
                freeAllocatedSinglePoly(pdblReal);
            }
        }
        else
        {
            int iRows                    = 0;
            int iCols                    = 0;
            int* piNbCoef            = NULL;
            double** pdblReal    = NULL;
            double** pdblImg    = NULL;

            if(isVarComplex(pvApiCtx, piAddr))
            {
                iRet = getAllocatedMatrixOfComplexPoly(pvApiCtx, piAddr, &iRows, &iCols, &piNbCoef, &pdblReal, &pdblImg);
                if(iRet)
                {
                    freeAllocatedMatrixOfComplexPoly(iRows, iCols, piNbCoef, pdblReal, pdblImg);
                    return iRet;
                }

                sciErr = createComplexMatrixOfPoly(pvApiCtx, Rhs + 1, pstVarName, iRows, iCols, piNbCoef, pdblReal, pdblImg);
                if(sciErr.iErr)
                {
                    freeAllocatedMatrixOfComplexPoly(iRows, iCols, piNbCoef, pdblReal, pdblImg);
                    printError(&sciErr, 0);
                    return sciErr.iErr;
                }
                freeAllocatedMatrixOfComplexPoly(iRows, iCols, piNbCoef, pdblReal, pdblImg);
            }
            else
            {
                iRet = getAllocatedMatrixOfPoly(pvApiCtx, piAddr, &iRows, &iCols, &piNbCoef, &pdblReal);
                if(iRet)
                {
                    freeAllocatedMatrixOfPoly(iRows, iCols, piNbCoef, pdblReal);
                    return iRet;
                }

                sciErr = createMatrixOfPoly(pvApiCtx, Rhs + 1, pstVarName, iRows, iCols, piNbCoef, pdblReal);
                if(sciErr.iErr)
                {
                    freeAllocatedMatrixOfPoly(iRows, iCols, piNbCoef, pdblReal);
                    printError(&sciErr, 0);
                    return sciErr.iErr;
                }
                freeAllocatedMatrixOfPoly(iRows, iCols, piNbCoef, pdblReal);
            }
        }
        LhsVar(1) = Rhs + 1;
    }
    else
    {
        LhsVar(1) = 0;
    }
    return 0;
}

Scilab test script

a = %s;
b = (2 + 3*%i) * %s;
c = [a, 2*a, 3*a;4*a, 5*a, 6*a];
d = [c + c * %i];
if polyExample(a) <> a then pause, end
if polyExample(b) <> b then pause, end
if polyExample(c) <> c then pause, end
if polyExample(d) <> d then pause, end
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Last updated:
Wed Jan 26 16:25:14 CET 2011