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/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file ini_type.h Types related to reading/writing '*.ini' files. */
#ifndef INI_TYPE_H
#define INI_TYPE_H
#include "fileio_type.h"
#include <string>
#include <optional>
/** Types of groups */
enum IniGroupType {
IGT_VARIABLES = 0, ///< Values of the form "landscape = hilly".
IGT_LIST = 1, ///< A list of values, separated by \n and terminated by the next group block.
IGT_SEQUENCE = 2, ///< A list of uninterpreted lines, terminated by the next group block.
};
/** A single "line" in an ini file. */
struct IniItem {
IniItem *next; ///< The next item in this group
std::string name; ///< The name of this item
std::optional<std::string> value; ///< The value of this item
std::string comment; ///< The comment associated with this item
IniItem(struct IniGroup *parent, const std::string &name);
~IniItem();
void SetValue(const std::string_view value);
};
/** A group within an ini file. */
struct IniGroup {
IniGroup *next; ///< the next group within this file
IniGroupType type; ///< type of group
IniItem *item; ///< the first item in the group
IniItem **last_item; ///< the last item in the group
std::string name; ///< name of group
std::string comment; ///< comment for group
IniGroup(struct IniLoadFile *parent, const std::string &name);
~IniGroup();
IniItem *GetItem(const std::string &name, bool create);
void Clear();
};
/** Ini file that only supports loading. */
struct IniLoadFile {
IniGroup *group; ///< the first group in the ini
IniGroup **last_group; ///< the last group in the ini
std::string comment; ///< last comment in file
const char * const *list_group_names; ///< nullptr terminated list with group names that are lists
const char * const *seq_group_names; ///< nullptr terminated list with group names that are sequences.
IniLoadFile(const char * const *list_group_names = nullptr, const char * const *seq_group_names = nullptr);
virtual ~IniLoadFile();
IniGroup *GetGroup(const std::string &name, bool create_new = true);
void RemoveGroup(const char *name);
void LoadFromDisk(const std::string &filename, Subdirectory subdir);
/**
* Open the INI file.
* @param filename Name of the INI file.
* @param subdir The subdir to load the file from.
* @param[out] size Size of the opened file.
* @return File handle of the opened file, or \c nullptr.
*/
virtual FILE *OpenFile(const std::string &filename, Subdirectory subdir, size_t *size) = 0;
/**
* Report an error about the file contents.
* @param pre Prefix text of the \a buffer part.
* @param buffer Part of the file with the error.
* @param post Suffix text of the \a buffer part.
*/
virtual void ReportFileError(const char * const pre, const char * const buffer, const char * const post) = 0;
};
/** Ini file that supports both loading and saving. */
struct IniFile : IniLoadFile {
IniFile(const char * const *list_group_names = nullptr);
bool SaveToDisk(const std::string &filename);
virtual FILE *OpenFile(const std::string &filename, Subdirectory subdir, size_t *size);
virtual void ReportFileError(const char * const pre, const char * const buffer, const char * const post);
};
#endif /* INI_TYPE_H */
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