era.mi/src/era/mi/logic/components/gates/MultiInputGate.java

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