1 package era.mi.logic.components;
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3 import java.util.List;
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5 import era.mi.logic.types.Bit;
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6 import era.mi.logic.wires.Wire;
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7 import era.mi.logic.wires.Wire.WireEnd;
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8 import era.mi.logic.wires.WireObserver;
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10 public class Merger implements WireObserver, Component
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12 private WireEnd out;
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13 private WireEnd[] inputs;
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14 private int[] beginningIndex;
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18 * @param union The output of merging n {@link Wire}s into one. Must have length = a1.length() + a2.length() + ... + an.length().
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19 * @param inputs The inputs to be merged into the union
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21 public Merger(WireEnd union, WireEnd... inputs)
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23 this.inputs = inputs;
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25 this.beginningIndex = new int[inputs.length];
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28 for (int i = 0; i < inputs.length; i++)
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30 beginningIndex[i] = length;
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31 length += inputs[i].length();
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32 inputs[i].addObserver(this);
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35 if (length != union.length())
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36 throw new IllegalArgumentException(
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37 "The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
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40 public WireEnd getInput(int index)
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42 return inputs[index];
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45 public WireEnd getUnion()
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51 public void update(Wire initiator, Bit[] oldValues)
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53 int index = find(initiator);
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54 int beginning = beginningIndex[index];
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55 out.feedSignals(beginning, inputs[index].getValues());
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58 private int find(Wire w)
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60 for (int i = 0; i < inputs.length; i++)
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61 if (inputs[i].getWire() == w)
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66 public WireEnd[] getInputs()
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68 return inputs.clone();
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72 public List<WireEnd> getAllInputs()
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74 return List.of(inputs);
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78 public List<WireEnd> getAllOutputs()
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80 return List.of(out);
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