scummvm/engines/grim/patchr.h
2021-12-26 21:19:38 +01:00

43 lines
1.5 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef GRIM_PATCHR_H
#define GRIM_PATCHR_H
namespace Grim {
/**
* Take an arbitrary SeekableReadStream and wrap it in a custom stream which
* transparently patch it on-the-fly. It uses filename.patchr as patchfile,
* but if it fails, it tries with filename_1.patchr and so on.
* If no valid patchfile exists, the original stream is returned unmodified
* (and in particular, not wrapped).
* For more informations, see diffr and patchr manuals.
*
* It is safe to call this with a NULL parameter (in this case, NULL is
* returned).
*/
Common::SeekableReadStream *wrapPatchedFile(Common::SeekableReadStream *rs, const Common::String &filename);
} // end of namespace Grim
#endif