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Справка Scilab >> API Scilab > double > double example

double example

Double use case.

Description

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

Gateway Source

#include "api_scilab.h"

int doubleExample(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(isEmptyMatrix(pvApiCtx, piAddr))
	{
		iRet = createEmptyMatrix(pvApiCtx, nbInputArgument(pvApiCtx) + 1);
		if(iRet)
		{
			return iRet;
		}

		AssignOutputVariable(pvApiCtx, 1) = 0;
	}
	else if(isDoubleType(pvApiCtx, piAddr))
	{
		if(isScalar(pvApiCtx, piAddr))
		{
			double dblReal	= 0;
			double dblImg   = 0;

			if(isVarComplex(pvApiCtx, piAddr))
			{
				iRet = getScalarComplexDouble(pvApiCtx, piAddr, &dblReal, &dblImg);
				if(iRet)
				{
					return iRet;
				}

				iRet = createScalarComplexDouble(pvApiCtx, nbInputArgument(pvApiCtx) + 1, dblReal, dblImg);
				if(iRet)
				{
					return iRet;
				}
			}
			else
			{
				iRet = getScalarDouble(pvApiCtx, piAddr, &dblReal);
				if(iRet)
				{
					return iRet;
				}

				iRet = createScalarDouble(pvApiCtx, nbInputArgument(pvApiCtx) + 1, dblReal);
				if(iRet)
				{
					return iRet;
				}
			}
		}
		else
		{
			int iRows			= 0;
			int iCols			= 0;
			double* pdblReal	= NULL;
			double* pdblImg		= NULL;

			if(isVarComplex(pvApiCtx, piAddr))
			{
				sciErr = getComplexMatrixOfDouble(pvApiCtx, piAddr, &iRows, &iCols, &pdblReal, &pdblImg);
				if(sciErr.iErr)
				{
					printError(&sciErr, 0);
					return sciErr.iErr;
				}

				sciErr = createComplexMatrixOfDouble(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRows, iCols, pdblReal, pdblImg);
				if(sciErr.iErr)
				{
					printError(&sciErr, 0);
					return sciErr.iErr;
				}
			}
			else
			{
				sciErr = getMatrixOfDouble(pvApiCtx, piAddr, &iRows, &iCols, &pdblReal);
				if(sciErr.iErr)
				{
					printError(&sciErr, 0);
					return sciErr.iErr;
				}

				sciErr = createMatrixOfDouble(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRows, iCols, pdblReal);
				if(sciErr.iErr)
				{
					printError(&sciErr, 0);
					return sciErr.iErr;
				}
			}
		}

        AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
	}

	return 0;
}

Scilab test script

a = 1;
b = %i;
c = [1,2,3;4,5,6];
d = c(1:$) + c($:-1:1) * %i;

doubleExample(a) == a
doubleExample(b) == b
doubleExample(c) == c
doubleExample(d) == d
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Last updated:
Thu Oct 02 14:01:18 CEST 2014