Computational routine
eng

##
gainblk_ui8n

### File content

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

    void gainblk_ui8n(scicos_block *block,int flag)
    {
     if ((flag==1)|(flag==6)){
      int i,j,l,ji,jl,il;
      unsigned char *u,*y;
      int mu,ny,my,mo,no;
      unsigned char *opar;
      double k,D,C,t;

      mo=GetOparSize(block,1,1);
      no=GetOparSize(block,1,2);
      mu=GetInPortRows(block,1);
      my=GetOutPortRows(block,1);
      ny=GetOutPortCols(block,1);
      u=Getuint8InPortPtrs(block,1);
      y=Getuint8OutPortPtrs(block,1);
      opar=Getuint8OparPtrs(block,1);

      k=pow(2,8);
      if (mo*no==1){
        for (i=0;i<ny*mu;++i){
         D=(double)(opar[0])*(double)(u[i]);
         t=D-(double)((int)(D/(k)))*((k));
         if ((t>=k/2)|(-(t)>=k/2))
           {if (t>=0) (t)=(-((k/2))+fabs(t-(double)((int)((t)/((k/2))))*((k/2))));
    	else (t)=-(-((k/2))+fabs(t-(double)((int)((t)/((k/2))))*((k/2))));}
         y[i]=(unsigned char)t;
        }
      }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;}
    		    t=D-(double)((int)(D/(k)))*((k));
    		    if ((t>=k/2)|(-(t)>=k/2))
    		       {if (t>=0) (t)=(-((k/2))+fabs(t-(double)((int)((t)/((k/2))))*((k/2))));
    			else (t)=-(-((k/2))+fabs(t-(double)((int)((t)/((k/2))))*((k/2))));}
    		    y[jl]=(unsigned char)t;
    		  }
    	     }
      }
     }
    }