Revert to older calc parser code for now

indra/llmath/llcalcparser.cpp

@@ -0,0 +1,63 @@
+/*
+ *  LLCalcParser.cpp
+ *  Copyright 2008 Aimee Walton.
+ * $LicenseInfo:firstyear=2008&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2008, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ *
+ */
+
+#include "linden_common.h"
+
+#include "llcalcparser.h"
+using namespace boost::spirit::classic;
+
+F32 LLCalcParser::lookup(const std::string::iterator& start, const std::string::iterator& end) const
+{
+	LLCalc::calc_map_t::iterator iter;
+
+	std::string name(start, end);
+	
+	if (mConstants)
+	{
+		iter = mConstants->find(name);
+		if (iter != mConstants->end())
+		{
+			return (*iter).second;
+		}
+	}
+	else
+	{
+		// This should never happen!
+		throw_(end, std::string("Missing constants table"));
+	}
+	
+	if (mVariables)
+	{
+		iter = mVariables->find(name);
+		if (iter != mVariables->end())
+		{
+			return (*iter).second;
+		}
+	}
+	
+	throw_(end, std::string("Unknown symbol " + name));
+	return 0.f;
+}