Moved expression parser to native and changed how it's accessed

Windows/Debugger/DebuggerShared.cpp

@@ -0,0 +1,31 @@
+#include "DebuggerShared.h"
+#include "../InputBox.h"
+
+bool parseExpression(char* exp, DebugInterface* cpu, u32& dest)
+{
+	PostfixExpression postfix;
+	if (cpu->initExpression(exp,postfix) == false) return false;
+	return cpu->parseExpression(postfix,dest);
+}
+
+void displayExpressionError(HWND hwnd)
+{
+	MessageBox(hwnd,getExpressionError(),"Invalid expression",MB_OK);
+}
+
+bool executeExpressionWindow(HWND hwnd, DebugInterface* cpu, u32& dest)
+{
+	char expression[1024];
+	if (InputBox_GetString(GetModuleHandle(NULL), hwnd, "Expression", "",expression) == false)
+	{
+		return false;
+	}
+
+	if (parseExpression(expression,cpu,dest) == false)
+	{
+		displayExpressionError(hwnd);
+		return false;
+	}
+
+	return true;
+}