Handle reading (Scilab gateway)

#include "api_scilab.h"
int read_write_handle(char *fname,unsigned long fname_len)
{
    SciErr sciErr;
    int i;
    //first variable info : real matrix of double
    int iRows       = 0;
    int iCols       = 0;
    int *piAddr     = NULL;
    long long* pllHandle   = NULL;

    //check input and output arguments
    CheckInputArgument(pvApiCtx, 1,1);
    CheckOutputArgument(pvApiCtx, 1,1);

    //get variable address of the first input argument
    sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //get size and data from Scilab memory
    sciErr = getMatrixOfHandle(pvApiCtx, piAddr, &iRows, &iCols, &pllHandle);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

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

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

f1 = scf(1);
f2 = scf(2);
a_ref = [f1, f2];
b = read_write_handle(a_ref);

if or(b <> a_ref) then error("failed"), end