/* 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
