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