Added era.mi; Project containing provisional simulator core

[Mograsim.git] / era.mi / src / era / mi / logic / components / Splitter.java

diff --git a/era.mi/src/era/mi/logic/components/Splitter.java b/era.mi/src/era/mi/logic/components/Splitter.java
new file mode 100644 (file)
index 0000000..48db52d
--- /dev/null
+++ b/era.mi/src/era/mi/logic/components/Splitter.java
@@ -0,0 +1,53 @@
+package era.mi.logic.components;
+
+import era.mi.logic.Bit;
+import era.mi.logic.WireArray;
+import era.mi.logic.WireArrayObserver;
+
+public class Splitter implements WireArrayObserver
+{
+       private WireArray input;
+       private WireArray[] outputs;
+       
+       public Splitter(WireArray input, WireArray... outputs)
+       {
+               this.input = input;
+               this.outputs = outputs;
+               input.addObserver(this);
+               int length = 0;
+               for(WireArray out : outputs)
+                       length += out.length();
+               
+               if(input.length() != length)
+                       throw new IllegalArgumentException("The input of splitting one into n WireArrays must have length = a1.length() + a2.length() + ... + an.length().");
+       }
+
+       protected void compute()
+       {
+               int startIndex = 0;
+               Bit[] inputBits = input.getValues();
+               for(int i = 0; i < outputs.length; i++)
+               {
+                       Bit[] outputBits = new Bit[outputs[i].length()];
+                       System.arraycopy(inputBits, startIndex, outputBits, 0, outputs[i].length());
+                       outputs[i].feedSignals(outputBits);
+                       startIndex += outputs[i].length();
+               }
+       }
+
+       public WireArray getInput()
+       {
+               return input;
+       }
+       
+       public WireArray[] getOutputs()
+       {
+               return outputs.clone();
+       }
+       
+       @Override
+       public void update(WireArray initiator)
+       {
+               compute();
+       }
+}