// $Id$
//
// Copyright (C) 2007
// Fraunhofer Institute for Open Communication Systems (FOKUS)
//
// The contents of this file are subject to the Fraunhofer FOKUS Public License
// Version 1.0 (the "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at 
// http://senf.berlios.de/license.html
//
// The Fraunhofer FOKUS Public License Version 1.0 is based on, 
// but modifies the Mozilla Public License Version 1.1.
// See the full license text for the amendments.
//
// Software distributed under the License is distributed on an "AS IS" basis, 
// WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
// for the specific language governing rights and limitations under the License.
//
// The Original Code is Fraunhofer FOKUS code.
//
// The Initial Developer of the Original Code is Fraunhofer-Gesellschaft e.V. 
// (registered association), Hansastraße 27 c, 80686 Munich, Germany.
// All Rights Reserved.
//
// Contributor(s):
//   Stefan Bund <g0dil@berlios.de>

/** \file
    \brief Config internal header */

#ifndef IH_SENF_Utils_Logger_Config_
#define IH_SENF_Utils_Logger_Config_ 1

// Custom includes
#include <boost/preprocessor/expand.hpp>
#include <boost/preprocessor/seq/for_each.hpp>
#include <boost/preprocessor/seq/to_tuple.hpp>
#include <boost/preprocessor/seq/fold_right.hpp>
#include <boost/preprocessor/seq/pop_back.hpp>
#include <boost/preprocessor/if.hpp>
#include <boost/preprocessor/facilities/is_empty.hpp>
#include <senf/Utils/preprocessor.hh>

//-/////////////////////////////////////////////////////////////////////////////////////////////////

namespace senf {
namespace log {
namespace detail {

    struct na {};

    /// Internal: Compile time configuration for given \a Stream and \a Area
    template <class Stream, class Area, class QueryStream=Stream, bool Query=true>
    struct Config
    {
        typedef typename Config<na, Area, Stream, Query>::compileLimit compileLimit;
    };

#   ifndef DOXYGEN

    template <class Area, class QueryStream, bool Query>
    struct Config<na, Area, QueryStream, Query>
    {
        typedef typename Config<QueryStream, na, QueryStream, Query>::compileLimit compileLimit;
    };

    template <class Stream, class QueryStream, bool Query>
    struct Config<Stream, na, QueryStream, Query>
    {
        typedef typename Config<na, na, QueryStream, Query>::compileLimit compileLimit;
    };

    template <class QueryStream, bool Query>
    struct Config<na, na, QueryStream, Query>
    {
        typedef typename QueryStream::compileLimit compileLimit;
    };

#   endif

}}}

#define SENF_LOG_CHECK_NA_

#define SENF_LOG_CAT(a,b) SENF_LOG_CAT_I(a,b)
#define SENF_LOG_CAT_I(a,b) a ## b

#define SENF_LOG_IS_NA(elt) BOOST_PP_IS_EMPTY( SENF_LOG_CAT(SENF_LOG_CHECK_NA, elt) )

#define SENF_LOG_SEQ_TO_NAME_(s,state,elem)                                                       \
    BOOST_PP_IF( SENF_LOG_IS_NA(elem), senf::log::detail::na, state::elem )

#define SENF_LOG_SEQ_TO_NAME(seq)                                                                 \
    BOOST_PP_SEQ_FOLD_LEFT(SENF_LOG_SEQ_TO_NAME_, , seq)

#define SENF_LOG_PREDECL_(s, state, elem)                                                         \
    namespace elem { state }

#define SENF_LOG_PREDECL_long(seq)                                                                \
    BOOST_PP_SEQ_FOLD_RIGHT( SENF_LOG_PREDECL_,                                                   \
                             struct SENF_PP_SEQ_BACK(seq);,                                        \
                             BOOST_PP_SEQ_POP_BACK(seq) )

#define SENF_LOG_PREDECL_short(seq)                                                               \
   BOOST_PP_IF( SENF_LOG_IS_NA( SENF_PP_SEQ_BACK(seq) ), ; , struct SENF_PP_SEQ_BACK(seq); )

#define SENF_LOG_PREDECL(seq)                                                                     \
    BOOST_PP_CAT(SENF_LOG_PREDECL_,                                                               \
                 BOOST_PP_IF(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)),long,short))(seq)

#define SENF_LOG_NIL(x)

#define SENF_LOG_CONF_DEFINE(stream, area, level)                                                 \
    SENF_LOG_PREDECL(stream)                                                                      \
    SENF_LOG_PREDECL(area)                                                                        \
    namespace senf { namespace log { namespace detail {                                           \
        template <class QueryStream>                                                              \
        struct Config< SENF_LOG_SEQ_TO_NAME(stream),                                              \
                       SENF_LOG_SEQ_TO_NAME(area),                                                \
                       QueryStream,                                                               \
                       true >                                                                     \
        { typedef senf::log::level compileLimit; };                                               \
    }}}

#ifdef SENF_LOG_CONF

#   define SLC_elt(r, data, elt) \
        SENF_LOG_CONF_DEFINE elt

    BOOST_PP_SEQ_FOR_EACH(SLC_elt, none, SENF_LOG_CONF)

#   undef SLC_elt

#endif




//-/////////////////////////////////////////////////////////////////////////////////////////////////
#endif


// Local Variables:
// mode: c++
// fill-column: 100
// comment-column: 40
// c-file-style: "senf"
// indent-tabs-mode: nil
// ispell-local-dictionary: "american"
// compile-command: "scons -u test"
// End: