era.mi/src/era/mi/logic/components/gates/MultiInputGate.java

   1 package era.mi.logic.components.gates;
   2
   3 import java.util.List;
   4
   5 import era.mi.logic.Bit;
   6 import era.mi.logic.components.BasicComponent;
   7 import era.mi.logic.wires.WireArray;
   8 import era.mi.logic.wires.WireArray.WireArrayEnd;
   9
  10 public abstract class MultiInputGate extends BasicComponent
  11 {
  12         protected WireArray[] in;
  13         protected WireArray out;
  14         protected WireArrayEnd outI;
  15         protected final int length;
  16         protected Operation op;
  17
  18         protected MultiInputGate(int processTime, Operation op, WireArray out, WireArray... in)
  19         {
  20                 super(processTime);
  21                 this.op = op;
  22                 length = out.length;
  23                 this.in = in.clone();
  24                 if (in.length < 1)
  25                         throw new IllegalArgumentException(String.format("Cannot create gate with %d wires.", in.length));
  26                 for (WireArray w : in)
  27                 {
  28                         if (w.length != length)
  29                                 throw new IllegalArgumentException("All wires connected to the gate must be of uniform length.");
  30                         w.addObserver(this);
  31                 }
  32                 this.out = out;
  33                 outI = out.createInput();
  34         }
  35
  36         @Override
  37         public List<WireArray> getAllInputs()
  38         {
  39                 return List.of(in);
  40         }
  41
  42         @Override
  43         public List<WireArray> getAllOutputs()
  44         {
  45                 return List.of(out);
  46         }
  47
  48         @Override
  49         protected void compute()
  50         {
  51                 Bit[] result = in[0].getValues();
  52                 for (int i = 1; i < in.length; i++)
  53                         result = op.execute(result, in[i].getValues());
  54                 outI.feedSignals(result);
  55         }
  56
  57         protected interface Operation
  58         {
  59                 public Bit[] execute(Bit[] a, Bit[] b);
  60         }
  61 }