iniParser.h

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/*
 * clockUtils
 * Copyright (2015) Michael Baer, Daniel Bonrath, All rights reserved.
 *
 * This file is part of clockUtils; clockUtils 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; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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
 */

#ifndef __CLOCKUTILS_INIPARSER_INIPARSER_H__
#define __CLOCKUTILS_INIPARSER_INIPARSER_H__

#include <cstdint>
#include <map>
#include <sstream>
#include <string>
#include <tuple>
#include <vector>

#include "clockUtils/errors.h"
#include "clockUtils/iniParser/iniParserParameters.h"

namespace clockUtils {
namespace iniParser {

        class CLOCK_INIPARSER_API IniParser {
        public:
                IniParser();

                ClockError load(const std::string & file);

                ClockError save(const std::string & file);

                template<typename T>
                typename std::enable_if<!std::is_enum<T>::value, ClockError>::type getValue(const std::string & section, const std::string & field, T & value) const {
                        auto it = _data.find(section);
                        if (it == _data.end()) {
                                return ClockError::VALUE_NOTFOUND;
                        }
                        for (const std::tuple<std::string, std::string, size_t, std::string> & t : it->second) {
                                if (std::get<SECTION>(t) == section && std::get<FIELD>(t) == field) {
                                        std::stringstream ss(std::get<VALUE>(t));
                                        if ((ss >> value).fail() || !ss.eof()) {
                                                return ClockError::WRONG_TYPE;
                                        }
                                        return ClockError::SUCCESS;
                                }
                        }

                        return ClockError::VALUE_NOTFOUND;
                }

                template<typename T>
                typename std::enable_if<std::is_enum<T>::value, ClockError>::type getValue(const std::string & section, const std::string & field, T & value) const {
                        auto it = _data.find(section);
                        if (it == _data.end()) {
                                return ClockError::VALUE_NOTFOUND;
                        }
                        for (const std::tuple<std::string, std::string, size_t, std::string> & t : it->second) {
                                if (std::get<SECTION>(t) == section && std::get<FIELD>(t) == field) {
                                        std::stringstream ss(std::get<VALUE>(t));
                                        int v;
                                        if ((ss >> v).fail() || !ss.eof()) {
                                                return ClockError::WRONG_TYPE;
                                        }
                                        value = T(v);
                                        return ClockError::SUCCESS;
                                }
                        }

                        return ClockError::VALUE_NOTFOUND;
                }

                template<typename T>
                typename std::enable_if<!std::is_enum<T>::value, void>::type setValue(const std::string & section, const std::string & field, const T & value) {
                        std::stringstream ss;
                        ss << value;
                        setValue(section, field, ss.str());
                }

                template<typename T>
                typename std::enable_if<std::is_enum<T>::value, void>::type setValue(const std::string & section, const std::string & field, const T & value) {
                        std::stringstream ss;
                        ss << int(value);
                        setValue(section, field, ss.str());
                }

                void setValue(const std::string & section, const std::string & field, const std::string & value) {
                        if (_data.find(section) == _data.end()) {
                                // create new section
                                _allLines[section].push_back("[" + section + "]");
                                _data[section].push_back(make_tuple(section, field, 1, value));
                                _allLines[section].push_back(""); // empty line. will be overritten anyways
                                return;
                        }
                        for (std::tuple<std::string, std::string, size_t, std::string> & t : _data[section]) {
                                if (std::get<SECTION>(t) == section && std::get<FIELD>(t) == field) {
                                        std::get<VALUE>(t) = value;
                                        return;
                                }
                        }
                        // value not found. Insert at end
                        if (_allLines[section].back() == "" && std::get<INDEX>(_data[section].back()) != _allLines[section].size() - 1) {
                                _data[section].push_back(make_tuple(section, field, _allLines[section].size() - 1, value));
                        } else {
                                _data[section].push_back(make_tuple(section, field, _allLines[section].size(), value));
                        }
                        _allLines[section].push_back(""); // empty line. will be overritten anyways
                }

                std::vector<std::string> getAllSections() const;

                std::vector<std::string> getAllEntries(const std::string & section) const;

                void removeEntry(const std::string & section, const std::string & entry);

        private:
                enum Fields {
                        SECTION,
                        FIELD,
                        INDEX,
                        VALUE
                };

                // one vector with lines/values for each section
                std::map<std::string, std::vector<std::tuple<std::string, std::string, size_t, std::string>>> _data;
                std::map<std::string, std::vector<std::string>> _allLines;
        };

        template<>
        ClockError CLOCK_INIPARSER_API IniParser::getValue<std::string>(const std::string & section, const std::string & field, std::string & value) const;

} /* namespace iniParser */
} /* namespace clockUtils */

#endif /* __CLOCKUTILS_INIPARSER_INIPARSER_H__ */