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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 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/>.
*
*/
#define FORBIDDEN_SYMBOL_EXCEPTION_setjmp
#define FORBIDDEN_SYMBOL_EXCEPTION_longjmp
#include "engines/grim/lua/lstate.h"
#include "engines/grim/lua/lua.h"
namespace Grim {
void lua_PatchGrimSave() {
// Since ResidualVM 0.2.0, a ResidualVM/ScummVM specific patch was provided broken.
// We patch here the code to fix all saves containing this invalid code.
// cf. bug #13139 and #14987
// The patch here doesn't match exactly the fixed patch.
// We minimize here the number of bytes to patch with an equivalent result.
TProtoFunc *tempProtoFunc = (TProtoFunc *)rootproto.next;
while (tempProtoFunc) {
if ((tempProtoFunc->lineDefined == 77) &&
(strcmp(tempProtoFunc->fileName->str, "Scripts\\vd.lua") == 0) &&
(memcmp(tempProtoFunc->code + 210, "\x22\x29\x39\x03\x32\x22\x30\x79\x02", 9) == 0)) {
tempProtoFunc->code[211] = 0x33;
tempProtoFunc->code[218] = 0x03;
break;
}
tempProtoFunc = (TProtoFunc *)tempProtoFunc->head.next;
}
}
} // end of namespace Grim
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