1 files changed, 65 insertions, 0 deletions
diff --git a/expr.cc b/expr.cc
new file mode 100644
index 0000000..ddc0135
--- /dev/null
+++ b/expr.cc
@@ -0,0 +1,65 @@
+/*
+ *  OpenSCAD (www.openscad.at)
+ *  Copyright (C) 2009  Clifford Wolf <clifford@clifford.at>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "openscad.h"
+
+Expression::Expression()
+{
+	type = 0;
+}
+
+Expression::~Expression()
+{
+	for (int i=0; i < children.size(); i++)
+		delete children[i];
+}
+
+Value Expression::evaluate(Context *context)
+{
+	switch (type)
+	{
+	case '*':
+		return children[0]->evaluate(context) * children[1]->evaluate(context);
+	case '/':
+		return children[0]->evaluate(context) / children[1]->evaluate(context);
+	case '%':
+		return children[0]->evaluate(context) % children[1]->evaluate(context);
+	case '+':
+		return children[0]->evaluate(context) + children[1]->evaluate(context);
+	case '-':
+		return children[0]->evaluate(context) - children[1]->evaluate(context);
+	case 'I':
+		return children[0]->evaluate(context).inv();
+	case 'C':
+		return const_value;
+	case 'V':
+		return context->lookup_variable(var_name);
+	case 'F':
+		{
+			QVector<Value> argvalues;
+			for (int i=0; i < children.size(); i++)
+				argvalues.append(children[i]->evaluate(context));
+			return context->evaluate_function(call_funcname, call_argnames, argvalues);
+		}
+	default:
+		return Value();
+	}
+}
+