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.WireArrayEnd;
   6 import era.mi.logic.wires.WireArrayObserver;
   7
   8 public class Splitter implements WireArrayObserver
   9 {
  10         private WireArray input;
  11         private WireArrayEnd[] 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(
  24                                         "The input of splitting one into n WireArrays must have length = a1.length() + a2.length() + ... + an.length().");
  25         }
  26
  27         protected void compute()
  28         {
  29                 int startIndex = 0;
  30                 Bit[] inputBits = input.getValues();
  31                 for (int i = 0; i < outputs.length; i++)
  32                 {
  33                         Bit[] outputBits = new Bit[outputs[i].owner.length];
  34                         System.arraycopy(inputBits, startIndex, outputBits, 0, outputs[i].owner.length);
  35                         outputs[i].feedSignals(outputBits);
  36                         startIndex += outputs[i].owner.length;
  37                 }
  38         }
  39
  40         @Override
  41         public void update(WireArray initiator, Bit[] oldValues)
  42         {
  43                 compute();
  44         }
  45 }