package era.mi.logic.components;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import era.mi.logic.Bit;
import era.mi.logic.wires.WireArray;
import era.mi.logic.wires.WireArray.WireArrayInput;
import era.mi.logic.wires.WireArrayObserver;
-public class Merger implements WireArrayObserver
-{
- private WireArrayInput outI;
- private WireArray[] inputs;
- private int[] beginningIndex;
+public class Merger implements WireArrayObserver, Component {
+ private WireArrayInput outI;
+ private WireArray[] inputs;
+ private int[] beginningIndex;
+
+ /**
+ *
+ * @param union The output of merging n {@link WireArray}s into one. Must have length = a1.length() + a2.length() + ... + an.length().
+ * @param inputs The inputs to be merged into the union
+ */
+ public Merger(WireArray union, WireArray... inputs) {
+ this.inputs = inputs;
+ this.outI = union.createInput();
+ this.beginningIndex = new int[inputs.length];
- /**
- *
- * @param union The output of merging n {@link WireArray}s into one. Must have
- * length = a1.length() + a2.length() + ... + an.length().
- * @param inputs The inputs to be merged into the union
- */
- public Merger(WireArray union, WireArray... inputs)
- {
- this.inputs = inputs;
- this.outI = union.createInput();
- this.beginningIndex = new int[inputs.length];
+ int length = 0;
+ for (int i = 0; i < inputs.length; i++) {
+ beginningIndex[i] = length;
+ length += inputs[i].length;
+ inputs[i].addObserver(this);
+ }
- int length = 0;
- for (int i = 0; i < inputs.length; i++)
- {
- beginningIndex[i] = length;
- length += inputs[i].length;
- inputs[i].addObserver(this);
+ if (length != union.length)
+ throw new IllegalArgumentException(
+ "The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
}
- if (length != union.length)
- throw new IllegalArgumentException(
- "The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
- }
+ public WireArray getInput(int index) {
+ return inputs[index];
+ }
+
+ public WireArray getUnion() {
+ return outI.owner;
+ }
- public WireArray getInput(int index)
- {
- return inputs[index];
- }
+ @Override
+ public void update(WireArray initiator, Bit[] oldValues) {
+ int index = find(initiator);
+ int beginning = beginningIndex[index];
+ outI.feedSignals(beginning, initiator.getValues());
+ }
- public WireArray getUnion()
- {
- return outI.owner;
- }
+ private int find(WireArray w) {
+ for (int i = 0; i < inputs.length; i++)
+ if (inputs[i] == w)
+ return i;
+ return -1;
+ }
- @Override
- public void update(WireArray initiator)
- {
- int index = find(initiator);
- int beginning = beginningIndex[index];
- outI.feedSignals(beginning, initiator.getValues());
- }
+ public WireArray[] getInputs() {
+ return inputs.clone();
+ }
- private int find(WireArray w)
- {
- for (int i = 0; i < inputs.length; i++)
- if (inputs[i] == w)
- return i;
- return -1;
- }
+ @Override
+ public List<WireArray> getAllInputs() {
+ return Collections.unmodifiableList(Arrays.asList(inputs));
+ }
- public WireArray[] getInputs()
- {
- return inputs.clone();
- }
+ @Override
+ public List<WireArray> getAllOutputs() {
+ return Collections.unmodifiableList(Arrays.asList(outI.owner));
+ }
}