include/pelib/AmplInputScalar.hpp

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/*
 Copyright 2015 Nicolas Melot

 This file is part of Pelib.

 Pelib 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 3 of the License, or
 (at your option) any later version.

 Pelib 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 Pelib. If not, see <http://www.gnu.org/licenses/>.
*/


#include <pelib/AmplInputData.hpp>
#include <pelib/DataParser.hpp>
#include <pelib/Scalar.hpp>
#include <pelib/CastException.hpp>
#include <pelib/ParseException.hpp>
#include <pelib/NoDecimalFloatException.hpp>
#ifndef PELIB_AMPLINPUTSCALAR
#define PELIB_AMPLINPUTSCALAR

#define debug(var) std::cout << "[" << __FILE__ << ":" << __FUNCTION__ << ":" << __LINE__ << "] " << #var << " = \"" << (var) << "\"" << std::endl;

namespace pelib
{
        template <class Value>
        class
        AmplInputScalar: public AmplInputData
        {
                public:
                        AmplInputScalar(bool strict = true)
                        {
                                this->strict = strict;
                        }
                        
                        virtual
                        AmplInputScalar*
                        clone() const
                        {
                                return new AmplInputScalar();
                        }
                        
                        virtual
                        AlgebraData*
                        parse(std::istream &in)
                        {
                                std::string str((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>());
                                boost::cmatch match;
                                // TODO: Investigate why regex doesn't return correct string when called in AlgebraDataParser
                                if(!boost::regex_match(str.c_str(), match, boost::regex(getDetailedPattern())))
                                {
                                        throw ParseException(std::string("String \"").append(str).append("\" doesn't match regex \"").append(getDetailedPattern()).append("\". "));
                                }
                                /*
                                try
                                {
                                        match = AlgebraDataParser::match(getDetailedPattern(), str);
        } catch(NoDecimalFloatException &e)
                                {
                                        std::ostringstream ss;
                                        ss << e.getValue();
                                        throw ParseException(std::string("Asked a decimal conversion, but \"").append(ss.str()).append("\" is integer."));
                                }
                                */

                                std::string match1 = match[1];
                                std::string match2 = match[2];
                                Value val = AlgebraDataParser::convert<Value>(match2, strict);
                                Scalar<Value> *scalar = new Scalar<Value>(match1, val);
                                return scalar;
                        }

                        virtual
                        void
                        dump(std::ostream &stream, const AlgebraData *data) const
                        {
                                const Scalar<Value> *scalar = dynamic_cast<const Scalar<Value>* >(data);
                                if(scalar == NULL) throw CastException("parameter \"data\" was not of type \"Scalar<Value>\".");

                                Value val = scalar->getValue();
                                if(scalar->getPrecision() == AlgebraData::higher)
                                {
                                        val = AlgebraData::fixPrecision(val, stream.precision());
                                }

                                stream << "param " << scalar->getName() << " := " << val << ";" << std::endl;
                        }

                        virtual
                        std::string
                        getDetailedPattern()
                        {
                                return "param\\s+([^\\s\\n]*)\\s*:=\\s*([^\\s]+)\\s*";
                        }

                        virtual
                        std::string
                        getGlobalPattern()
                        {
                                return "param\\s+[^\\s\\n]*\\s*:=.+";
                        }
        
                protected:
                        bool strict;
                private:                
        };
}

#undef debug
#endif