reorganized file structure layout. more to follow...

git-svn-id: http://svn.clifford.at/openscad/trunk@364 b57f626f-c46c-0410-a088-ec61d464b74c

1 files changed, 179 insertions, 0 deletions

diff --git a/src/expr.cc b/src/expr.cc
new file mode 100644
index 0000000..e20e977
--- /dev/null
+++ b/src/expr.cc
@@ -0,0 +1,179 @@
+/*
+ *  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()
+{
+	const_value = NULL;
+}
+
+Expression::~Expression()
+{
+	for (int i=0; i < children.size(); i++)
+		delete children[i];
+	if (const_value)
+		delete const_value;
+}
+
+Value Expression::evaluate(const Context *context) const
+{
+	if (type == "!")
+		return ! children[0]->evaluate(context);
+	if (type == "&&")
+		return children[0]->evaluate(context) && children[1]->evaluate(context);
+	if (type == "||")
+		return children[0]->evaluate(context) || children[1]->evaluate(context);
+	if (type == "*")
+		return children[0]->evaluate(context) * children[1]->evaluate(context);
+	if (type == "/")
+		return children[0]->evaluate(context) / children[1]->evaluate(context);
+	if (type == "%")
+		return children[0]->evaluate(context) % children[1]->evaluate(context);
+	if (type == "+")
+		return children[0]->evaluate(context) + children[1]->evaluate(context);
+	if (type == "-")
+		return children[0]->evaluate(context) - children[1]->evaluate(context);
+	if (type == "<")
+		return children[0]->evaluate(context) < children[1]->evaluate(context);
+	if (type == "<=")
+		return children[0]->evaluate(context) <= children[1]->evaluate(context);
+	if (type == "==")
+		return children[0]->evaluate(context) == children[1]->evaluate(context);
+	if (type == "!=")
+		return children[0]->evaluate(context) != children[1]->evaluate(context);
+	if (type == ">=")
+		return children[0]->evaluate(context) >= children[1]->evaluate(context);
+	if (type == ">")
+		return children[0]->evaluate(context) > children[1]->evaluate(context);
+	if (type == "?:") {
+		Value v = children[0]->evaluate(context);
+		if (v.type == Value::BOOL)
+			return children[v.b ? 1 : 2]->evaluate(context);
+		return Value();
+	}
+	if (type == "[]") {
+		Value v1 = children[0]->evaluate(context);
+		Value v2 = children[1]->evaluate(context);
+		if (v1.type == Value::VECTOR && v2.type == Value::NUMBER) {
+			int i = (int)(v2.num);
+			if (i < v1.vec.size())
+				return *v1.vec[i];
+		}
+		return Value();
+	}
+	if (type == "I")
+		return children[0]->evaluate(context).inv();
+	if (type == "C")
+		return *const_value;
+	if (type == "R") {
+		Value v1 = children[0]->evaluate(context);
+		Value v2 = children[1]->evaluate(context);
+		Value v3 = children[2]->evaluate(context);
+		if (v1.type == Value::NUMBER && v2.type == Value::NUMBER && v3.type == Value::NUMBER) {
+			Value r = Value();
+			r.type = Value::RANGE;
+			r.range_begin = v1.num;
+			r.range_step = v2.num;
+			r.range_end = v3.num;
+			return r;
+		}
+		return Value();
+	}
+	if (type == "V") {
+		Value v;
+		v.type = Value::VECTOR;
+		for (int i = 0; i < children.size(); i++)
+			v.vec.append(new Value(children[i]->evaluate(context)));
+		return v;
+	}
+	if (type == "L")
+		return context->lookup_variable(var_name);
+	if (type == "N")
+	{
+		Value v = children[0]->evaluate(context);
+
+		if (v.type == Value::VECTOR && var_name == QString("x"))
+			return *v.vec[0];
+		if (v.type == Value::VECTOR && var_name == QString("y"))
+			return *v.vec[1];
+		if (v.type == Value::VECTOR && var_name == QString("z"))
+			return *v.vec[2];
+
+		if (v.type == Value::RANGE && var_name == QString("begin"))
+			return Value(v.range_begin);
+		if (v.type == Value::RANGE && var_name == QString("step"))
+			return Value(v.range_step);
+		if (v.type == Value::RANGE && var_name == QString("end"))
+			return Value(v.range_end);
+
+		return Value();
+	}
+	if (type == "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);
+	}
+	abort();
+}
+
+QString Expression::dump() const
+{
+	if (type == "*" || type == "/" || type == "%" || type == "+" || type == "-" ||
+			type == "<" || type == "<=" || type == "==" || type == "!=" || type == ">=" || type == ">")
+		return QString("(%1 %2 %3)").arg(children[0]->dump(), QString(type), children[1]->dump());
+	if (type == "?:")
+		return QString("(%1 ? %2 : %3)").arg(children[0]->dump(), children[1]->dump(), children[2]->dump());
+	if (type == "[]")
+		return QString("(%1[%2])").arg(children[0]->dump(), children[1]->dump());
+	if (type == "I")
+		return QString("(-%1)").arg(children[0]->dump());
+	if (type == "C")
+		return const_value->dump();
+	if (type == "R")
+		return QString("[%1 : %2 : %3]").arg(children[0]->dump(), children[1]->dump(), children[2]->dump());
+	if (type == "V") {
+		QString text = QString("[");
+		for (int i=0; i < children.size(); i++) {
+			if (i > 0)
+				text += QString(", ");
+			text += children[i]->dump();
+		}
+		return text + QString("]");
+	}
+	if (type == "L")
+		return var_name;
+	if (type == "N")
+		return QString("(%1.%2)").arg(children[0]->dump(), var_name);
+	if (type == "F") {
+		QString text = call_funcname + QString("(");
+		for (int i=0; i < children.size(); i++) {
+			if (i > 0)
+				text += QString(", ");
+			if (!call_argnames[i].isEmpty())
+				text += call_argnames[i] + QString(" = ");
+			text += children[i]->dump();
+		}
+		return text + QString(")");
+	}
+	abort();
+}
+