X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=era.mi%2Fsrc%2Fera%2Fmi%2Flogic%2Fcomponents%2FMerger2.java;fp=era.mi%2Fsrc%2Fera%2Fmi%2Flogic%2Fcomponents%2FMerger2.java;h=ca242544891d895517a7e8d9899e452198f2d613;hb=a4c5cfb856026771dfcf31eb22434b8b6ff20ad4;hp=0000000000000000000000000000000000000000;hpb=7199371e42ba04d2daab9f8512fdf25bd5f5ff92;p=Mograsim.git

diff --git a/era.mi/src/era/mi/logic/components/Merger2.java b/era.mi/src/era/mi/logic/components/Merger2.java
new file mode 100644
index 00000000..ca242544
--- /dev/null
+++ b/era.mi/src/era/mi/logic/components/Merger2.java
@@ -0,0 +1,70 @@
+package era.mi.logic.components;
+
+import era.mi.logic.WireArray;
+import era.mi.logic.WireArrayObserver;
+
+public class Merger2 implements WireArrayObserver
+{
+	private WireArray out;
+	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 Merger2(WireArray union, WireArray... inputs)
+	{
+		this.inputs = inputs;
+		this.out = union;
+		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);
+		}
+			
+		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 out;
+	}
+	
+	@Override
+	public void update(WireArray initiator)
+	{
+		int index = find(initiator);
+		int beginning = beginningIndex[index];
+		out.feedSignals(beginning, initiator.getValues());
+	}
+	
+	private int find(WireArray w)
+	{
+		for(int i = 0; i < inputs.length; i++)
+			if(inputs[i] == w)
+				return i;
+		return -1;
+	}
+
+	public WireArray getOut()
+	{
+		return out;
+	}
+
+	public WireArray[] getInputs()
+	{
+		return inputs.clone();
+	}
+}