DotInternal.h

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/*CXXR $Id: DotInternal.h 1397 2013-08-16 18:25:59Z arr $
 *CXXR
 *CXXR This file is part of CXXR, a project to refactor the R interpreter
 *CXXR into C++.  It may consist in whole or in part of program code and
 *CXXR documentation taken from the R project itself, incorporated into
 *CXXR CXXR (and possibly MODIFIED) under the terms of the GNU General Public
 *CXXR Licence.
 *CXXR 
 *CXXR CXXR is Copyright (C) 2008-13 Andrew R. Runnalls, subject to such other
 *CXXR copyrights and copyright restrictions as may be stated below.
 *CXXR 
 *CXXR CXXR is not part of the R project, and bugs and other issues should
 *CXXR not be reported via r-bugs or other R project channels; instead refer
 *CXXR to the CXXR website.
 *CXXR */

/*
 *  R : A Computer Language for Statistical Data Analysis
 *  Copyright (C) 1995, 1996  Robert Gentleman and Ross Ihaka
 *  Copyright (C) 1999-2006   The R Development Core Team.
 *
 *  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 2.1 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, a copy is available at
 *  http://www.r-project.org/Licenses/
 */

#ifndef DOTINTERNAL_H
#define DOTINTERNAL_H

#include "CXXR/RObject.h"

#ifdef __cplusplus

#include "CXXR/BuiltInFunction.h"
#include "CXXR/GCRoot.h"
#include "CXXR/SEXP_downcast.hpp"
#include "CXXR/StdFrame.hpp"
#include "CXXR/Symbol.h"

namespace CXXR {
    class DotInternalTable {
    public:
        static BuiltInFunction* get(const Symbol* sym)
        {
            map::iterator it = s_table->find(sym);
            if (it == s_table->end())
                return 0;
            return (*it).second;
        }

        static void set(const Symbol* sym, BuiltInFunction* fun);
    private:
        typedef
        std::tr1::unordered_map<const Symbol*,
                                GCRoot<BuiltInFunction>,
                                std::tr1::hash<const Symbol*>,
                                std::equal_to<const Symbol*>,
                                CXXR::Allocator<std::pair<const Symbol* const,
                                                          GCRoot<BuiltInFunction> > >
                                > map;

        static map* s_table;

        // Called from BuiltInFunction::initialize():
        static void initialize();

        friend class BuiltInFunction;
    };
}  // namespace CXXR

extern "C" {
#endif

#ifndef __cplusplus
    SEXP INTERNAL(SEXP x);
#else
    inline SEXP INTERNAL(SEXP x)
    {
        using namespace CXXR;
        const Symbol* sym = SEXP_downcast<Symbol*>(x);
        return DotInternalTable::get(sym);
    }
#endif

    void SET_INTERNAL(SEXP x, SEXP v);

#ifdef __cplusplus
}
#endif

#endif /* DOTINTERNAL_H */