fileio_type.h

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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/>.
 */
 
#ifndef FILEIO_TYPE_H
#define FILEIO_TYPE_H
 
#include "core/enum_type.hpp"
#include "misc/autorelease.hpp"
 
enum AbstractFileType : uint8_t {
  FT_NONE,      
  FT_SAVEGAME,  
  FT_SCENARIO,  
  FT_HEIGHTMAP, 
  FT_TOWN_DATA, 
 
  FT_INVALID = 7, 
};
enum AbstractFileType : uint8_t {…};
 
enum DetailedFileType : uint8_t {
  /* Save game and scenario files. */
  DFT_OLD_GAME_FILE, 
  DFT_GAME_FILE,     
 
  /* Heightmap files. */
  DFT_HEIGHTMAP_BMP, 
  DFT_HEIGHTMAP_PNG, 
 
  /* Town data files. */
  DFT_TOWN_DATA_JSON,  
 
  /* fios 'files' */
  DFT_FIOS_DRIVE,  
  DFT_FIOS_PARENT, 
  DFT_FIOS_DIR,    
  DFT_FIOS_DIRECT, 
 
  DFT_END,         
 
  DFT_INVALID = 255, 
};
enum DetailedFileType : uint8_t {…};
 
enum SaveLoadOperation : uint8_t {
  SLO_CHECK,   
  SLO_LOAD,    
  SLO_SAVE,    
 
  SLO_INVALID, 
};
enum SaveLoadOperation : uint8_t {…};
 
struct FiosType {
  AbstractFileType abstract; 
  DetailedFileType detailed; 
 
  constexpr bool operator==(const FiosType &) const noexcept = default;
};
struct FiosType {…};
 
constexpr FiosType FIOS_TYPE_DRIVE{FT_NONE, DFT_FIOS_DRIVE};
constexpr FiosType FIOS_TYPE_PARENT{FT_NONE, DFT_FIOS_PARENT};
constexpr FiosType FIOS_TYPE_DIR{FT_NONE, DFT_FIOS_DIR};
constexpr FiosType FIOS_TYPE_DIRECT{FT_NONE, DFT_FIOS_DIRECT};
 
constexpr FiosType FIOS_TYPE_FILE{FT_SAVEGAME, DFT_GAME_FILE};
constexpr FiosType FIOS_TYPE_OLDFILE{FT_SAVEGAME, DFT_OLD_GAME_FILE};
constexpr FiosType FIOS_TYPE_SCENARIO{FT_SCENARIO, DFT_GAME_FILE};
constexpr FiosType FIOS_TYPE_OLD_SCENARIO{FT_SCENARIO, DFT_OLD_GAME_FILE};
constexpr FiosType FIOS_TYPE_PNG{FT_HEIGHTMAP, DFT_HEIGHTMAP_PNG};
constexpr FiosType FIOS_TYPE_BMP{FT_HEIGHTMAP, DFT_HEIGHTMAP_BMP};
constexpr FiosType FIOS_TYPE_JSON{FT_TOWN_DATA, DFT_TOWN_DATA_JSON};
 
constexpr FiosType FIOS_TYPE_INVALID{FT_INVALID, DFT_INVALID};
 
enum Subdirectory : uint8_t {
  BASE_DIR,      
  SAVE_DIR,      
  AUTOSAVE_DIR,  
  SCENARIO_DIR,  
  HEIGHTMAP_DIR, 
  OLD_GM_DIR,    
  OLD_DATA_DIR,  
  BASESET_DIR,   
  NEWGRF_DIR,    
  LANG_DIR,      
  AI_DIR,        
  AI_LIBRARY_DIR,
  GAME_DIR,      
  GAME_LIBRARY_DIR, 
  SCREENSHOT_DIR,   
  SOCIAL_INTEGRATION_DIR, 
  DOCS_DIR,      
  NUM_SUBDIRS,   
  NO_DIRECTORY,  
};
enum Subdirectory : uint8_t {…};
 
enum Searchpath : uint8_t {
  SP_FIRST_DIR,
  SP_WORKING_DIR = SP_FIRST_DIR, 
#ifdef USE_XDG
  SP_PERSONAL_DIR_XDG,           
#endif
  SP_PERSONAL_DIR,               
  SP_SHARED_DIR,                 
  SP_BINARY_DIR,                 
  SP_INSTALLATION_DIR,           
  SP_APPLICATION_BUNDLE_DIR,     
  SP_AUTODOWNLOAD_DIR,           
  SP_AUTODOWNLOAD_PERSONAL_DIR,  
  SP_AUTODOWNLOAD_PERSONAL_DIR_XDG, 
  NUM_SEARCHPATHS
};
enum Searchpath : uint8_t {…};
 
DECLARE_INCREMENT_DECREMENT_OPERATORS(Searchpath)
 
class FileHandle {
public:
  static std::optional<FileHandle> Open(const std::string &filename, std::string_view mode);
  static std::optional<FileHandle> Open(std::string_view filename, std::string_view mode) { return FileHandle::Open(std::string{filename}, mode); }
 
  inline void Close() { this->f.reset(); }
 
  inline operator FILE *()
  {
    assert(this->f != nullptr);
    return this->f.get();
  }
 
private:
  AutoRelease<FILE, fclose> f;
 
  FileHandle(FILE *f) : f(f) { assert(this->f != nullptr); }
};
class FileHandle {…};
 
/* Ensure has_value() is used consistently. */
template <> constexpr std::optional<FileHandle>::operator bool() const noexcept = delete;
 
#endif /* FILEIO_TYPE_H */