static double *mttu;		/* pointer to inputs */
static double *mttpar;		/* pointer to parameters */
static double *mttx;		/* pointer to states */
static double *mtty;		/* pointer to outputs */
static double  mttt;		/* time */

static double *controller_inputs;
static double *controller_outputs;
static double *MTT_outputs;
static double *MTT_inputs;

static unsigned int i;		/* loop counter */

/* Start EDIT */
/* Edit this block to define the number of controller inputs, outputs and parameters */
const int NumberOfControllerInputs	= 1; /* inputs TO controller */
const int NumberOfControllerOutputs	= 1; /* outputs FROM controller */
/* Edit this block to define the number of simulink inputs, outputs and parameters */
#define NumberOfSimulinkInputs	MTTNY /* MTT outputs */
#define NumberOfSimulinkOutputs	MTTNU /* MTT inputs */
/* End EDIT */

static void
<mtt_model_name>_process_inputs (SimStruct *S)
{
  /* insert <mtt_model_name>_struc.c */

  /* Start EDIT */
  /* Edit this block to process the model inputs and outputs */
  
  /* Remove the following line */
  ssSetErrorStatus (S, "<mtt_model_name>_sfun_interface.c has not been customised!\n");
  /* Error messages can be set using the following line */
  /*  ssSetErrorStatus (S, "<mtt_model_name>_some error message!\n"); */

  /* simple example follows */
  /* Default is to expose all MTT inputs, outputs and states */

  /* Get total of all outputs and input to controller */
  /* Get all the MTT model outputs and pass them to simulink */
  controller_inputs[0] = 0.0;
  for (i = 0; i < MTTNY; i++) {
    controller_inputs[0] += mtty[i];
  for (i = 0; i < NumberOfSimulinkInputs; i++) {
    MTT_outputs[i] = mtty[i];
  }

  /* Get all inputs from Simulink and pass them to the MTT model */
  /* overwrite first model input with output from controller */
  mttu[0] = controller_outputs[0];
  /* Any inputs not over-written here will be read from <mtt_model_name>_input.c  */
  for (i = 0; i < NumberOfSimulinkOutputs; i++) {
    mttu[i] = MTT_inputs[i];
  }

  /* End EDIT */
}


/******************************************************************************
 *                DO NOT EDIT ANYTHING BELOW THIS LINE                        *

      array_name = "mttpar";
    } else if (array == mttu) {
      array_name = "mttu";
    } else if (array == mttx) {
      array_name = "mttx";
    } else if (array == mtty) {
      array_name = "mtty";
    } else if (array == controller_inputs) {
      array_name = "controller_inputs";
    } else if (array == controller_outputs) {
      array_name = "controller_outputs";
    } else if (array == MTT_outputs) {
      array_name = "MTT_outputs";
    } else if (array == MTT_inputs) {
      array_name = "MTT_inputs";
    } else {
      array_name = "unknown_array";
    }
    sprintf(warning, "(time %f) Non-finite array element: %s[%d]\n", mttt, array_name, index);
    ssWarning(S, warning);
  }
}

static void
initialise_arrays (void)
{
  PRINT_ENTER;

  mttpar	= array_of_double (MTTNPAR);
  mttu		= array_of_double (MTTNU + MTTNYZ);
  mttx		= array_of_double (MTTNX);
  mtty		= array_of_double (MTTNY);

  controller_inputs	= array_of_double (NumberOfControllerInputs);
  controller_outputs	= array_of_double (NumberOfControllerOutputs);
  MTT_outputs	= array_of_double (NumberOfSimulinkInputs);
  MTT_inputs	= array_of_double (NumberOfSimulinkOutputs);

  PRINT_LEAVE;
}

static void
update_inputs_from_simulink (SimStruct *S)
{
  PRINT_ENTER;
  for (i = 0; i < MTTNU; i++) {
    mttu[i] = *ssGetInputPortRealSignalPtrs (S, 0)[i];
    check_finite(S, mttu, i);
  }
  for (i = 0; i < MTTNX; i++) {
    mttx[i] = *ssGetInputPortRealSignalPtrs (S, 1)[i];
    check_finite(S, mttx, i);
  }
  for (i = 0; i < MTTNY; i++) {
    mtty[i] = *ssGetInputPortRealSignalPtrs (S, 2)[i];
    check_finite(S, mtty, i);
  }
  for (i = 0; i < NumberOfControllerOutputs; i++) {
    controller_outputs[i] = *ssGetInputPortRealSignalPtrs (S, 3)[i];
    check_finite(S, controller_outputs, i);
  for (i = 0; i < NumberOfSimulinkOutputs; i++) {
    MTT_inputs[i] = *ssGetInputPortRealSignalPtrs (S, 3)[i];
    check_finite(S, MTT_inputs, i);
  }
  PRINT_LEAVE;
}

static void
update_simtime_from_simulink (SimStruct *S)
{

  ssSetNumContStates(S, 0);
  ssSetNumDiscStates(S, 0);
  
  if (!ssSetNumInputPorts(S, 4)) return;
  ssSetInputPortWidth(S, 0, MTTNU);
  ssSetInputPortWidth(S, 1, MTTNX);
  ssSetInputPortWidth(S, 2, MTTNY);
  ssSetInputPortWidth(S, 3, NumberOfControllerOutputs);	/* inputs from controller */
  ssSetInputPortWidth(S, 3, NumberOfSimulinkOutputs);	/* inputs from simulink */
  ssSetInputPortDirectFeedThrough(S, 0, 1);
  ssSetInputPortDirectFeedThrough(S, 1, 1);
  ssSetInputPortDirectFeedThrough(S, 2, 1);
  ssSetInputPortDirectFeedThrough(S, 3, 1);
    
  if (!ssSetNumOutputPorts(S, 2)) return;
  ssSetOutputPortWidth(S, 0, MTTNU); /* altered inputs */
  ssSetOutputPortWidth(S, 1, NumberOfControllerInputs); /* outputs to controller */
  ssSetOutputPortWidth(S, 1, NumberOfSimulinkInputs); /* outputs to simulink */
    
  ssSetNumSampleTimes(S, 1);
  ssSetNumRWork(S, 0);
  ssSetNumIWork(S, 0);
  ssSetNumPWork(S, 0);
  ssSetNumModes(S, 0);
  ssSetNumNonsampledZCs(S, 0);

  UNUSED_ARG(tid); /* not used in single tasking mode */

  for (i = 0; i < MTTNU; i++) {
    check_finite(S, mttu, i);
    ssGetOutputPortRealSignal (S, 0)[i] = mttu[i];
  }
  
  for (i = 0; i < NumberOfControllerInputs; i++) {
    check_finite(S, controller_inputs, i);
    ssGetOutputPortRealSignal (S, 1)[i] = controller_inputs[i];
  for (i = 0; i < NumberOfSimulinkInputs; i++) {
    check_finite(S, MTT_outputs, i);
    ssGetOutputPortRealSignal (S, 1)[i] = MTT_outputs[i];
  }

  PRINT_LEAVE;
}

#define MDL_DERIVATIVES
static void mdlDerivatives(SimStruct *S)

  UNUSED_ARG(S);

  free (mttpar);
  free (mttu);
  free (mttx);
  free (mtty);

  free (controller_inputs);
  free (controller_outputs);
  free (MTT_outputs);
  free (MTT_inputs);

  PRINT_LEAVE;
}

#ifdef  MATLAB_MEX_FILE    /* Is this file being compiled as a MEX-file? */
#include "simulink.c"      /* MEX-file interface mechanism */
#else
#include "cg_sfun.h"       /* Code generation registration function */
#endif