Rhino.Optimizer.Codegen.GenerateCallMethod C# (CSharp) Method

		private void GenerateCallMethod(ClassFileWriter cfw)
		{
			cfw.StartMethod("call", "(Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "Lorg/mozilla/javascript/Scriptable;" + "[Ljava/lang/Object;)Ljava/lang/Object;", (short)(ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
			// Generate code for:
			// if (!ScriptRuntime.hasTopCall(cx)) {
			//     return ScriptRuntime.doTopCall(this, cx, scope, thisObj, args);
			// }
			int nonTopCallLabel = cfw.AcquireLabel();
			cfw.AddALoad(1);
			//cx
			cfw.AddInvoke(ByteCode.INVOKESTATIC, "org/mozilla/javascript/ScriptRuntime", "hasTopCall", "(Lorg/mozilla/javascript/Context;" + ")Z");
			cfw.Add(ByteCode.IFNE, nonTopCallLabel);
			cfw.AddALoad(0);
			cfw.AddALoad(1);
			cfw.AddALoad(2);
			cfw.AddALoad(3);
			cfw.AddALoad(4);
			cfw.AddInvoke(ByteCode.INVOKESTATIC, "org/mozilla/javascript/ScriptRuntime", "doTopCall", "(Lorg/mozilla/javascript/Callable;" + "Lorg/mozilla/javascript/Context;" + "Lorg/mozilla/javascript/Scriptable;" + "Lorg/mozilla/javascript/Scriptable;" + "[Ljava/lang/Object;" + ")Ljava/lang/Object;");
			cfw.Add(ByteCode.ARETURN);
			cfw.MarkLabel(nonTopCallLabel);
			// Now generate switch to call the real methods
			cfw.AddALoad(0);
			cfw.AddALoad(1);
			cfw.AddALoad(2);
			cfw.AddALoad(3);
			cfw.AddALoad(4);
			int end = scriptOrFnNodes.Length;
			bool generateSwitch = (2 <= end);
			int switchStart = 0;
			int switchStackTop = 0;
			if (generateSwitch)
			{
				cfw.AddLoadThis();
				cfw.Add(ByteCode.GETFIELD, cfw.GetClassName(), ID_FIELD_NAME, "I");
				// do switch from (1,  end - 1) mapping 0 to
				// the default case
				switchStart = cfw.AddTableSwitch(1, end - 1);
			}
			for (int i = 0; i != end; ++i)
			{
				ScriptNode n = scriptOrFnNodes[i];
				if (generateSwitch)
				{
					if (i == 0)
					{
						cfw.MarkTableSwitchDefault(switchStart);
						switchStackTop = cfw.GetStackTop();
					}
					else
					{
						cfw.MarkTableSwitchCase(switchStart, i - 1, switchStackTop);
					}
				}
				if (n.GetType() == Token.FUNCTION)
				{
					OptFunctionNode ofn = OptFunctionNode.Get(n);
					if (ofn.IsTargetOfDirectCall())
					{
						int pcount = ofn.fnode.GetParamCount();
						if (pcount != 0)
						{
							// loop invariant:
							// stack top == arguments array from addALoad4()
							for (int p = 0; p != pcount; ++p)
							{
								cfw.Add(ByteCode.ARRAYLENGTH);
								cfw.AddPush(p);
								int undefArg = cfw.AcquireLabel();
								int beyond = cfw.AcquireLabel();
								cfw.Add(ByteCode.IF_ICMPLE, undefArg);
								// get array[p]
								cfw.AddALoad(4);
								cfw.AddPush(p);
								cfw.Add(ByteCode.AALOAD);
								cfw.Add(ByteCode.GOTO, beyond);
								cfw.MarkLabel(undefArg);
								PushUndefined(cfw);
								cfw.MarkLabel(beyond);
								// Only one push
								cfw.AdjustStackTop(-1);
								cfw.AddPush(0.0);
								// restore invariant
								cfw.AddALoad(4);
							}
						}
					}
				}
				cfw.AddInvoke(ByteCode.INVOKESTATIC, mainClassName, GetBodyMethodName(n), GetBodyMethodSignature(n));
				cfw.Add(ByteCode.ARETURN);
			}
			cfw.StopMethod((short)5);
		}