Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Please login or create an account
Change language to: English - Français - Português - 日本語
Справка Scilab >> API Scilab > legacy > Low level functions > AssignOutputVariable

AssignOutputVariable

a C gateway function which specifies which parameters created inside the C gateway will be returned as an output argument into Scilab.

Syntax

AssignOutputVariable(pvApiCtx, RankPos) = RankVar;

Arguments

RankPos

as integer providing the rank of the output argument

RankVar

the rank of the parameter created inside the C gateway to be returned as an Scilab output argument

Description

A C gateway function which specifies which variables created inside the C interface will be returned as an output argument into Scilab.

Examples

This example takes a matrix of doubles as input and returns:

  • the number of lines (first output argument)

  • the number of rows (second output argument)

We create an intermediate Scilab parameter which will handle an integer but will neither be used nor returned as an output argument.

#include "api_scilab.h"
int sci_mysizedouble(char * fname, void* pvApiCtx)
{
    SciErr      sciErr;
    int         m_in_row;
    int         n_in_col;
    int*        piAddr = NULL;
    double*     pdblData = NULL;

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

    /* get dimensions */
    sciErr = getMatrixOfDouble(pvApiCtx, piAddr, &m_in_row, &n_in_col, &pdblData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    sciErr = createMatrixOfInteger32(pvApiCtx, nbInputArgument(pvApiCtx) + 1, 1, 1, &m_in_row); // the m_in_row parameter handles the number of lines of the matrix sent as argument
    sciErr = createMatrixOfInteger32(pvApiCtx, nbInputArgument(pvApiCtx) + 2, 1, 1, &m_in_row); // store a same value, but will neither be used nor returned to Scilab
    sciErr = createMatrixOfInteger32(pvApiCtx, nbInputArgument(pvApiCtx) + 3, 1, 1, &n_in_col); // the n_in_col parameter handles the number of columns of the matrix sent as argument

    AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1; // We set the parameter "nbInputArgument(pvApiCtx) + 1" as an output argument
    AssignOutputVariable(pvApiCtx, 2) = nbInputArgument(pvApiCtx) + 3; // We set the parameter "nbInputArgument(pvApiCtx) + 3" as an output argument
    ReturnArguments(pvApiCtx);
    return 0;
}
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Tue Feb 14 15:13:38 CET 2017