era.mi/src/era/mi/logic/components/Splitter.java

   1 package era.mi.logic.components;
   2
   3 import era.mi.logic.Bit;
   4 import era.mi.logic.wires.WireArray;
   5 import era.mi.logic.wires.WireArray.WireArrayInput;
   6 import era.mi.logic.wires.WireArrayObserver;
   7
   8 public class Splitter implements WireArrayObserver
   9 {
  10         private WireArray input;
  11         private WireArrayInput[] outputs;
  12
  13         public Splitter(WireArray input, WireArray... outputs)
  14         {
  15                 this.input = input;
  16                 this.outputs = WireArray.extractInputs(outputs);
  17                 input.addObserver(this);
  18                 int length = 0;
  19                 for(WireArray out : outputs)
  20                         length += out.length;
  21
  22                 if(input.length != length)
  23                         throw new IllegalArgumentException("The input of splitting one into n WireArrays must have length = a1.length() + a2.length() + ... + an.length().");
  24         }
  25
  26         protected void compute()
  27         {
  28                 int startIndex = 0;
  29                 Bit[] inputBits = input.getValues();
  30                 for(int i = 0; i < outputs.length; i++)
  31                 {
  32                         Bit[] outputBits = new Bit[outputs[i].owner.length];
  33                         System.arraycopy(inputBits, startIndex, outputBits, 0, outputs[i].owner.length);
  34                         outputs[i].feedSignals(outputBits);
  35                         startIndex += outputs[i].owner.length;
  36                 }
  37         }
  38
  39         @Override
  40         public void update(WireArray initiator, Bit[] oldValues)
  41         {
  42                 compute();
  43         }
  44 }