/*
 *  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;
}