1 package era.mi.logic.components;
\r
3 import java.util.Arrays;
\r
4 import java.util.Collections;
\r
5 import java.util.List;
\r
7 import era.mi.logic.Bit;
\r
8 import era.mi.logic.wires.WireArray;
\r
9 import era.mi.logic.wires.WireArray.WireArrayInput;
\r
10 import era.mi.logic.wires.WireArrayObserver;
\r
12 public class Merger implements WireArrayObserver, Component {
\r
13 private WireArrayInput outI;
\r
14 private WireArray[] inputs;
\r
15 private int[] beginningIndex;
\r
19 * @param union The output of merging n {@link WireArray}s into one. Must have length = a1.length() + a2.length() + ... + an.length().
\r
20 * @param inputs The inputs to be merged into the union
\r
22 public Merger(WireArray union, WireArray... inputs) {
\r
23 this.inputs = inputs;
\r
24 this.outI = union.createInput();
\r
25 this.beginningIndex = new int[inputs.length];
\r
28 for (int i = 0; i < inputs.length; i++) {
\r
29 beginningIndex[i] = length;
\r
30 length += inputs[i].length;
\r
31 inputs[i].addObserver(this);
\r
34 if (length != union.length)
\r
35 throw new IllegalArgumentException(
\r
36 "The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
\r
39 public WireArray getInput(int index) {
\r
40 return inputs[index];
\r
43 public WireArray getUnion() {
\r
48 public void update(WireArray initiator, Bit[] oldValues) {
\r
49 int index = find(initiator);
\r
50 int beginning = beginningIndex[index];
\r
51 outI.feedSignals(beginning, initiator.getValues());
\r
54 private int find(WireArray w) {
\r
55 for (int i = 0; i < inputs.length; i++)
\r
61 public WireArray[] getInputs() {
\r
62 return inputs.clone();
\r
66 public List<WireArray> getAllInputs() {
\r
67 return Collections.unmodifiableList(Arrays.asList(inputs));
\r
71 public List<WireArray> getAllOutputs() {
\r
72 return Collections.unmodifiableList(Arrays.asList(outI.owner));
\r