era.mi/src/net/mograsim/logic/core/components/Connector.java

   1 package net.mograsim.logic.core.components;
   2
   3 import java.util.List;
   4
   5 import net.mograsim.logic.core.timeline.Timeline;
   6 import net.mograsim.logic.core.types.BitVector;
   7 import net.mograsim.logic.core.wires.WireObserver;
   8 import net.mograsim.logic.core.wires.Wire.ReadEnd;
   9 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
  10
  11 public class Connector extends Component implements WireObserver
  12 {
  13         private boolean connected;
  14         private final ReadWriteEnd a;
  15         private final ReadWriteEnd b;
  16
  17         public Connector(Timeline timeline, ReadWriteEnd a, ReadWriteEnd b)
  18         {
  19                 super(timeline);
  20                 if (a.length() != b.length())
  21                         throw new IllegalArgumentException(String.format("WireArray width does not match: %d, %d", a.length(), b.length()));
  22                 this.a = a;
  23                 this.b = b;
  24                 a.addObserver(this);
  25                 b.addObserver(this);
  26         }
  27
  28         public void connect()
  29         {
  30                 connected = true;
  31                 update(a);
  32                 update(b);
  33         }
  34
  35         public void disconnect()
  36         {
  37                 connected = false;
  38                 a.clearSignals();
  39                 b.clearSignals();
  40         }
  41
  42         public void setConnection(boolean connected)
  43         {
  44                 if (connected)
  45                         connect();
  46                 else
  47                         disconnect();
  48         }
  49
  50         @Override
  51         public void update(ReadEnd initiator, BitVector oldValues)
  52         {
  53                 if (connected)
  54                         timeline.addEvent(e -> update(initiator), 1);
  55         }
  56
  57         private void update(ReadEnd initiator)
  58         {
  59                 if (initiator == a)
  60                         b.feedSignals(a.wireValuesExcludingMe());
  61                 else
  62                         a.feedSignals(b.wireValuesExcludingMe());
  63         }
  64
  65         @Override
  66         public List<ReadEnd> getAllInputs()
  67         {
  68                 return List.of(a, b);
  69         }
  70
  71         @Override
  72         public List<ReadWriteEnd> getAllOutputs()
  73         {
  74                 return List.of(a, b);
  75         }
  76 }