string_sequence_rule.hpp

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// (c) Copyright 2015 DESY, Eugen Wintersberger <eugen.wintersberger@desy.de>
//
// This file is part of libpniio.
//
// libpniio 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.
//
// libpniio 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 libpniio.  If not, see <http://www.gnu.org/licenses/>.
// ===========================================================================
//
// Created on: Feb 2, 2015
//     Author: Eugen Wintersberger <eugen.wintersberger@desy.de>
//
//
#pragma once


#include <sstream>

#include <boost/algorithm/string.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include<pni/core/types.hpp>
#include<pni/core/error.hpp>
#include<vector>

#include "../exceptions.hpp"
#include "get_rule_type.hpp"
#include "delimiter_rule.hpp"

namespace pni{
namespace io{

    struct trim_string
    {
        template<typename Sig> struct result
        {
            typedef pni::core::string type; 
        };

        //--------------------------------------------------------------------
        template<typename Arg>
        pni::core::string operator()(Arg const &n) const
        {
            pni::core::string output(n.begin(),n.end());
            boost::trim(output);
            return output;
        }
    };


    //------------------------------------------------------------------------
    template<
             typename ITERT,
             typename ST
            >
    struct string_sequence_rule : boost::spirit::qi::grammar<ITERT,ST()>
    {
        boost::spirit::qi::rule<ITERT,pni::core::string()> element_rule_;
        boost::spirit::qi::rule<ITERT> start_;
        boost::spirit::qi::rule<ITERT> stop_;
        boost::spirit::qi::rule<ITERT> delimiter_;

        boost::spirit::qi::rule<ITERT,ST()> sequence_;

        boost::phoenix::function<trim_string> trim;

        //--------------------------------------------------------------------
        string_sequence_rule() : string_sequence_rule::base_type(sequence_)
        { 
            using namespace boost::spirit;
            using qi::_val;
            using qi::_1;

            delimiter_ = +qi::blank;
            element_rule_ = (*(qi::char_-delimiter_))[_val = trim(_1)];
            sequence_ = element_rule_ % delimiter_; 
        }

        //--------------------------------------------------------------------
        string_sequence_rule(char del): 
            string_sequence_rule::base_type(sequence_)
        {
            using namespace boost::spirit;
            using qi::_val;
            using qi::_1;

            if(del==' ')
                delimiter_ = +qi::blank;
            else
                delimiter_ = qi::char_(del);

            element_rule_ = (*(qi::char_-delimiter_))[_val = trim(_1)];
            sequence_ = element_rule_ % delimiter_;
        }

        //--------------------------------------------------------------------
        string_sequence_rule(char start,char stop):
            string_sequence_rule::base_type(sequence_)
        {
            using namespace boost::spirit;
            using qi::_1;
            using qi::_val;

            start_ = qi::char_(start)>*qi::blank;
            stop_  = *qi::blank>qi::char_(stop);
            delimiter_ = +qi::blank;
            element_rule_ = (+(qi::char_-(qi::lit(stop)|qi::blank)))[_val=trim(_1)];
            sequence_ = start_> (element_rule_ % delimiter_)>stop_;
        }

        //--------------------------------------------------------------------
        string_sequence_rule(char start,char stop,char del):
            string_sequence_rule::base_type(sequence_)
        {
            using namespace boost::spirit;
            start_ = qi::char_(start)>*qi::blank;
            stop_  = *qi::blank>qi::char_(stop);

            if(del==' ')
                delimiter_ = +qi::blank;
            else
                delimiter_ = qi::char_(del);

            element_rule_ = (*(qi::char_-(qi::lit(stop)|delimiter_)))[qi::_val =
                trim(qi::_1)];
            sequence_ = start_>(element_rule_ % delimiter_)>stop_;
        }

    };

//end of namespace
}
}