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Справка Scilab >> API Scilab > polynomial > polynomial example

polynomial example

Polynom use case.

Description

This example shows how to get a polynomial 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;

    CheckInputArgument(pvApiCtx, 1, 1);
    CheckOutputArgument(pvApiCtx, 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, nbInputArgument(pvApiCtx) + 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, nbInputArgument(pvApiCtx) + 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, nbInputArgument(pvApiCtx) + 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, nbInputArgument(pvApiCtx) + 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);
			}
		}

        AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
	}
	else
	{
        AssignOutputVariable(pvApiCtx, 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:
Thu Oct 02 14:01:18 CEST 2014