view examples/myfeval.c @ 18367:d1e16bdb3958 stable

myfeval.c: Fix segfault in mex example code. * myfeval.c: Correctly cast away const attribute of prhs[]. Also, add code to work with Octave's built-in 'ans' variable. * external.txi: Update example in External Code Interface for myfeval.
author Rik <rik@octave.org>
date Fri, 24 Jan 2014 09:09:48 -0800
parents 224e76250443
children
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line source

#include "mex.h"

void
mexFunction (int nlhs, mxArray* plhs[],
             int nrhs, const mxArray* prhs[])
{
  char *str;

  mexPrintf ("Starting file myfeval.mex\n");

  mexPrintf ("I have %d inputs and %d outputs\n", nrhs, nlhs);

  if (nrhs < 1 || ! mxIsString (prhs[0]))
    mexErrMsgTxt ("ARG1 must be a function name");

  str = mxArrayToString (prhs[0]);

  mexPrintf ("I'm going to call the function %s\n", str);

  if (nlhs == 0)
    nlhs = 1;  // Octave's automatic 'ans' variable

  /* Cast prhs just to get rid of 'const' qualifier and stop compile warning */
  mexCallMATLAB (nlhs, plhs, nrhs-1, (mxArray**)prhs+1, str);

  mxFree (str);
}