Computational routine
eng

##
counter

### File content

    #include "scicos_block4.h"
    #include <math.h>

    void counter(scicos_block *block,int flag)
    {
      double *y,*z;
      int *ipar;
      y=GetRealOutPortPtrs(block,1);
      z=GetDstate(block);
      ipar=GetIparPtrs(block);
      if (flag==1)
        {if (*ipar==1) *y=*z+*(ipar+2);
         else *y=*(ipar+1)-*z;}
      else if (flag==2)
        {*z=(1+(int)*z)%(*(ipar+1)-*(ipar+2)+1);}
    }