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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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.
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef COMMON_SAVEFILE_H
#define COMMON_SAVEFILE_H
#include "common/noncopyable.h"
#include "common/scummsys.h"
#include "common/stream.h"
#include "common/str-array.h"
#include "common/error.h"
namespace Common {
/**
* A class which allows game engines to load game state data.
* That typically means "save games", but also includes things like the
* IQ points in Indy3.
*/
typedef SeekableReadStream InSaveFile;
/**
* A class which allows game engines to save game state data.
* That typically means "save games", but also includes things like the
* IQ points in Indy3.
*/
typedef WriteStream OutSaveFile;
/**
* The SaveFileManager is serving as a factory for InSaveFile
* and OutSaveFile objects.
*
* Engines and other code should use SaveFiles whenever they need to
* store data which they need to be able to retrieve again later on --
* i.e. typically save states, but also configuration files and similar
* things.
*
* While not declared as a singleton, it is effectively used as such,
* with OSystem::getSavefileManager returning a pointer to the single
* SaveFileManager instances to be used.
*/
class SaveFileManager : NonCopyable {
protected:
Error _error;
String _errorDesc;
/**
* Set some information about the last error which occurred .
* @param error Code identifying the last error.
* @param errorDesc String describing the last error.
*/
virtual void setError(Error error, const String &errorDesc) { _error = error; _errorDesc = errorDesc; }
public:
virtual ~SaveFileManager() {}
/**
* Clears the last set error code and string.
*/
virtual void clearError() { _error = kNoError; _errorDesc.clear(); }
/**
* Returns the last occurred error code. If none occurred, returns kNoError.
*
* @return A value indicating the type of the last error.
*/
virtual Error getError() { return _error; }
/**
* Returns the last occurred error description. If none occurred, returns 0.
*
* @return A string describing the last error.
*/
virtual String getErrorDesc() { return _errorDesc; }
/**
* Returns the last occurred error description. If none occurred, returns 0.
* Also clears the last error state and description.
*
* @return A string describing the last error.
*/
virtual String popErrorDesc();
/**
* Open the savefile with the specified name in the given directory for
* saving.
*
* Saved games are compressed by default, and engines are expected to
* always write compressed saves.
*
* A notable exception is if uncompressed files are needed for
* compatibility with games not supported by ScummVM, such as character
* exports from the Quest for Glory series. QfG5 is a 3D game and won't be
* supported by ScummVM.
*
* @param name the name of the savefile
* @param compress toggles whether to compress the resulting save file
* (default) or not.
* @return pointer to an OutSaveFile, or NULL if an error occurred.
*/
virtual OutSaveFile *openForSaving(const String &name, bool compress = true) = 0;
/**
* Open the file with the specified name in the given directory for loading.
* @param name the name of the savefile
* @return pointer to an InSaveFile, or NULL if an error occurred.
*/
virtual InSaveFile *openForLoading(const String &name) = 0;
/**
* Removes the given savefile from the system.
* @param name the name of the savefile to be removed.
* @return true if no error occurred, false otherwise.
*/
virtual bool removeSavefile(const String &name) = 0;
/**
* Renames the given savefile.
* @param oldName Old name.
* @param newName New name.
* @return true if no error occurred. false otherwise.
*/
virtual bool renameSavefile(const String &oldName, const String &newName);
/**
* Copy the given savefile.
* @param oldName Old name.
* @param newName New name.
* @return true if no error occurred. false otherwise.
*/
virtual bool copySavefile(const String &oldName, const String &newName);
/**
* Request a list of available savegames with a given DOS-style pattern,
* also known as "glob" in the POSIX world. Refer to the Common::matchString()
* function to learn about the precise pattern format.
* @param pattern Pattern to match. Wildcards like * or ? are available.
* @return list of strings for all present file names.
* @see Common::matchString()
*/
virtual StringArray listSavefiles(const String &pattern) = 0;
};
} // End of namespace Common
#endif
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