# boolean sparse example

Boolean sparse use case.

## Description

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

## Gateway Source

    #include "api_scilab.h"

    int booleanSparseExample(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(isBooleanSparseType(pvApiCtx, piAddr))
    	{
    		int iRows			= 0;
    		int iCols			= 0;
    		int iNbItem			= 0;
    		int* piNbItemRow	= NULL;
    		int* piColPos		= NULL;

    		iRet = getAllocatedBooleanSparseMatrix(pvApiCtx, piAddr, &iRows, &iCols, &iNbItem, &piNbItemRow, &piColPos);
    		if(iRet)
    		{
    			freeAllocatedBooleanSparse(piNbItemRow, piColPos);
    			return iRet;
    		}

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

    		freeAllocatedBooleanSparse(piNbItemRow, piColPos);
    		AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
    	}
    	return 0;
    }

## Scilab test script

    bsp = sparse([1,1;2,2;3,3],[%t,%t,%t]);
    or(booleanSparseExample(bsp) == bsp)