--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/luan/interp/LuaStateImpl.java	Thu Dec 13 02:50:04 2012 +0000
@@ -0,0 +1,50 @@
+package luan.interp;
+
+import luan.LuaState;
+import luan.LuaTable;
+import luan.LuaFunction;
+
+
+final class LuaStateImpl implements LuaState {
+	private final LuaTable env = new LuaTable();
+
+	public LuaTable env() {
+		return env;
+	}
+
+
+	private static class LuaStack {
+		final LuaStack previousStack;
+		final Object[] a;
+		final Object[] varArgs;
+
+		LuaStack( LuaStack previousStack, int stackSize, Object[] varArgs) {
+			this.previousStack = previousStack;
+			this.a = new Object[stackSize];
+			this.varArgs = varArgs;
+		}
+	}
+
+	private LuaStack stack = null;
+	public Object[] returnValues;
+	public LuaClosure tailFn;
+
+	Object[] newStack(int stackSize, Object[] varArgs) {
+		stack = new LuaStack(stack,stackSize,varArgs);
+		return stack.a;
+	}
+
+	void popStack() {
+		returnValues = LuaFunction.EMPTY_RTN;
+		tailFn = null;
+		stack = stack.previousStack;
+	}
+
+	public Object[] stack() {
+		return stack.a;
+	}
+
+	public Object[] varArgs() {
+		return stack.varArgs;
+	}
+}