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

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