Computational routine
eng

##
gainblk_i16e

### File content

    #include <math.h>
    #include "../machine.h"
    #include "scicos_block4.h"
    extern int sciprint();
    void gainblk_i16e(scicos_block *block,int flag)
    {
     if ((flag==1)|(flag==6)){
      int i,j,l,ji,jl,il;
      short *u,*y;
      int mu,ny,my,mo,no;
      short *opar;
      double k,D,C;
      mo=GetOparSize(block,1,1);
      no=GetOparSize(block,1,2);
      mu=GetInPortRows(block,1);
      my=GetOutPortRows(block,1);
      ny=GetOutPortCols(block,1);
      u=Getint16InPortPtrs(block,1);
      y=Getint16OutPortPtrs(block,1);
      opar=Getint16OparPtrs(block,1);
      k=pow(2,16)/2;
      if (mo*no==1){
        for (i=0;i<ny*mu;++i){
         D=(double)(opar[0])*(double)(u[i]);
         if ((D>=k)|( D<-k))
    	{sciprint("overflow error");
    	 set_block_error(-4);
    	 return;}
        else y[i]=(short)D;
        }
      }else{
         for (l=0;l<ny;l++)
    	 {for (j=0;j<my;j++)
    	      {D=0;
    	       for (i=0;i<mu;i++)
    		   {ji=j+i*my;
    		    jl=j+l*my;
    		    il=i+l*mu;
    		    C=(double)(opar[ji])*(double)(u[il]);
    		    D=D + C;}
    		    if ((D>=k)|( D<-k))
    			{sciprint("overflow error");
    			 set_block_error(-4);
    			 return;}
    		    else y[jl]=(short)D;
    		  }
    	     }
      }
     }
    }