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