mirror of
https://github.com/libretro/scummvm.git
synced 2025-02-13 23:43:34 +00:00
e4f08a4644
Shivers uses extra special hardcoded save files together with the normal ones that are used to store slot names and spot descriptions. The scheme is a bit odd, and since the names of the extra save files are hardcoded, this scheme is problematic to use. We skip the creation of these files altogether and use virtual files instead, which means that the (broken) spot descriptions won't be visible next to each save description. This isn't a major issue for now, and it's left as a future TODO to implement this feature in a cleaner way, and not with extra save files. This scheme fixes the slot descriptions in the loading screen. Also, kCD(1) has been implemented, which fixes loading of the save states themselves
141 lines
3.9 KiB
C++
141 lines
3.9 KiB
C++
/* 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 SCI_ENGINE_FILE_H
|
|
#define SCI_ENGINE_FILE_H
|
|
|
|
#include "common/str-array.h"
|
|
#include "common/stream.h"
|
|
|
|
namespace Sci {
|
|
|
|
enum {
|
|
_K_FILE_MODE_OPEN_OR_CREATE = 0,
|
|
_K_FILE_MODE_OPEN_OR_FAIL = 1,
|
|
_K_FILE_MODE_CREATE = 2
|
|
};
|
|
|
|
/* Maximum length of a savegame name (including terminator character). */
|
|
#define SCI_MAX_SAVENAME_LENGTH 0x24
|
|
|
|
enum {
|
|
MAX_SAVEGAME_NR = 20 /**< Maximum number of savegames */
|
|
};
|
|
|
|
#define VIRTUALFILE_HANDLE 200
|
|
#define PHANTASMAGORIA_SAVEGAME_INDEX "phantsg.dir"
|
|
|
|
struct SavegameDesc {
|
|
int16 id;
|
|
int virtualId; // straight numbered, according to id but w/o gaps
|
|
int date;
|
|
int time;
|
|
int version;
|
|
char name[SCI_MAX_SAVENAME_LENGTH];
|
|
};
|
|
|
|
class FileHandle {
|
|
public:
|
|
Common::String _name;
|
|
Common::SeekableReadStream *_in;
|
|
Common::WriteStream *_out;
|
|
|
|
public:
|
|
FileHandle();
|
|
~FileHandle();
|
|
|
|
void close();
|
|
bool isOpen() const;
|
|
};
|
|
|
|
|
|
class DirSeeker {
|
|
protected:
|
|
reg_t _outbuffer;
|
|
Common::StringArray _files;
|
|
Common::StringArray _virtualFiles;
|
|
Common::StringArray::const_iterator _iter;
|
|
|
|
public:
|
|
DirSeeker() {
|
|
_outbuffer = NULL_REG;
|
|
_iter = _files.begin();
|
|
}
|
|
|
|
reg_t firstFile(const Common::String &mask, reg_t buffer, SegManager *segMan);
|
|
reg_t nextFile(SegManager *segMan);
|
|
|
|
Common::String getVirtualFilename(uint fileNumber);
|
|
|
|
private:
|
|
void addAsVirtualFiles(Common::String title, Common::String fileMask);
|
|
};
|
|
|
|
|
|
#ifdef ENABLE_SCI32
|
|
|
|
/**
|
|
* An implementation of a virtual file that supports basic read and write
|
|
* operations simultaneously.
|
|
*
|
|
* This class has been initially implemented for Phantasmagoria, which has its
|
|
* own custom save/load code. The load code keeps checking for the existence
|
|
* of the save index file and keeps closing and reopening it for each save
|
|
* slot. This is notoriously slow and clumsy, and introduces noticeable delays,
|
|
* especially for non-desktop systems. Also, its game scripts request to open
|
|
* the index file for reading and writing with the same parameters
|
|
* (SaveManager::setCurrentSave and SaveManager::getCurrentSave). Moreover,
|
|
* the game scripts reopen the index file for writing in order to update it
|
|
* and seek within it. We do not support seeking in writeable streams, and the
|
|
* fact that our saved games are ZIP files makes this operation even more
|
|
* expensive. Finally, the savegame index file is supposed to be expanded when
|
|
* a new save slot is added.
|
|
* For the aforementioned reasons, this class has been implemented, which offers
|
|
* the basic functionality needed by the game scripts in Phantasmagoria.
|
|
*/
|
|
class VirtualIndexFile {
|
|
public:
|
|
VirtualIndexFile(Common::String fileName);
|
|
VirtualIndexFile(uint32 initialSize);
|
|
~VirtualIndexFile();
|
|
|
|
uint32 read(char *buffer, uint32 size);
|
|
uint32 readLine(char *buffer, uint32 size);
|
|
uint32 write(const char *buffer, uint32 size);
|
|
bool seek(int32 offset, int whence);
|
|
void close();
|
|
|
|
private:
|
|
char *_buffer;
|
|
uint32 _bufferSize;
|
|
char *_ptr;
|
|
|
|
Common::String _fileName;
|
|
bool _changed;
|
|
};
|
|
|
|
#endif
|
|
|
|
} // End of namespace Sci
|
|
|
|
#endif // SCI_ENGINE_FILE_H
|