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