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.BitVector;
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6 import era.mi.logic.wires.Wire;
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7 import era.mi.logic.wires.Wire.ReadEnd;
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8 import era.mi.logic.wires.Wire.ReadWriteEnd;
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9 import era.mi.logic.wires.WireObserver;
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11 public class Merger implements WireObserver, Component
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13 private ReadWriteEnd out;
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14 private ReadEnd[] inputs;
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15 private int[] beginningIndex;
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19 * @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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20 * @param inputs The inputs to be merged into the union
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22 public Merger(ReadWriteEnd union, ReadEnd... inputs)
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24 this.inputs = inputs;
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26 this.beginningIndex = new int[inputs.length];
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29 for (int i = 0; i < inputs.length; i++)
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31 beginningIndex[i] = length;
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32 length += inputs[i].length();
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33 inputs[i].addObserver(this);
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36 if (length != union.length())
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37 throw new IllegalArgumentException(
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38 "The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
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41 public ReadEnd getInput(int index)
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43 return inputs[index];
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46 public ReadEnd getUnion()
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52 public void update(ReadEnd initiator, BitVector oldValues)
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54 int index = find(initiator);
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55 int beginning = beginningIndex[index];
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56 out.feedSignals(beginning, inputs[index].getValues());
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59 private int find(ReadEnd r)
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61 for (int i = 0; i < inputs.length; i++)
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67 public ReadEnd[] getInputs()
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69 return inputs.clone();
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73 public List<ReadEnd> getAllInputs()
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75 return List.of(inputs);
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79 public List<ReadWriteEnd> getAllOutputs()
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81 return List.of(out);
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