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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.
*
*/
#include "glk/tads/detection.h"
#include "glk/tads/detection_tables.h"
#include "glk/blorb.h"
#include "common/debug.h"
#include "common/file.h"
#include "common/md5.h"
#include "engines/game.h"
namespace Glk {
namespace TADS {
void TADSMetaEngine::getSupportedGames(PlainGameList &games) {
for (const PlainGameDescriptor *pd = TADS2_GAME_LIST; pd->gameId; ++pd)
games.push_back(*pd);
for (const PlainGameDescriptor *pd = TADS3_GAME_LIST; pd->gameId; ++pd)
games.push_back(*pd);
}
GameDescriptor TADSMetaEngine::findGame(const char *gameId) {
for (const PlainGameDescriptor *pd = TADS2_GAME_LIST; pd->gameId; ++pd) {
if (!strcmp(gameId, pd->gameId)) {
GameDescriptor gd = *pd;
gd._options = OPTION_TADS2;
return gd;
}
}
for (const PlainGameDescriptor *pd = TADS3_GAME_LIST; pd->gameId; ++pd) {
if (!strcmp(gameId, pd->gameId)) {
GameDescriptor gd = *pd;
gd._options = OPTION_TADS3;
return gd;
}
}
return GameDescriptor::empty();
}
bool TADSMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
const char *const EXTENSIONS[] = { ".gam", ".t3", nullptr };
// Loop through the files of the folder
for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
// Check for a recognised filename
if (file->isDirectory())
continue;
Common::String filename = file->getName();
bool hasExt = Blorb::hasBlorbExt(filename), isBlorb = true;
int tadsVersion = -1;
for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
hasExt = filename.hasSuffixIgnoreCase(*ext);
if (!hasExt)
continue;
// Open up the file and calculate the md5
Common::File gameFile;
if (!gameFile.open(*file))
continue;
Common::String md5 = Common::computeStreamMD5AsString(gameFile, 5000);
size_t filesize = gameFile.size();
gameFile.seek(0);
if (Blorb::isBlorb(gameFile, ID_TAD2))
tadsVersion = 2;
else if (Blorb::isBlorb(gameFile, ID_TAD3))
tadsVersion = 3;
else
isBlorb = false;
if (!isBlorb)
// Figure out the TADS version
tadsVersion = getTADSVersion(gameFile);
gameFile.close();
if (tadsVersion == -1)
// Not a TADS game, or Blorb containing TADS game, so can be ignored
continue;
// Check for known games
const GlkDetectionEntry *p = TADS_GAMES;
while (p->_gameId && p->_md5 && (md5 != p->_md5 || filesize != p->_filesize))
++p;
DetectedGame gd;
if (!p->_gameId) {
const GameDescriptor &desc = tadsVersion == 2 ? TADS2_GAME_LIST[0] : TADS3_GAME_LIST[0];
gameList.push_back(GlkDetectedGame(desc._gameId, desc._description, filename, md5, filesize));
} else {
PlainGameDescriptor gameDesc = findGame(p->_gameId);
gd = DetectedGame(p->_gameId, gameDesc.description, p->_language, Common::kPlatformUnknown, p->_extra);
gd.addExtraEntry("filename", filename);
gameList.push_back(gd);
}
}
return !gameList.empty();
}
void TADSMetaEngine::detectClashes(Common::StringMap &map) {
for (const PlainGameDescriptor *pd = TADS2_GAME_LIST; pd->gameId; ++pd) {
if (map.contains(pd->gameId))
error("Duplicate game Id found - %s", pd->gameId);
map[pd->gameId] = "";
}
for (const PlainGameDescriptor *pd = TADS3_GAME_LIST; pd->gameId; ++pd) {
if (map.contains(pd->gameId))
error("Duplicate game Id found - %s", pd->gameId);
map[pd->gameId] = "";
}
}
int TADSMetaEngine::getTADSVersion(Common::SeekableReadStream &game) {
// Read in the start of the file
char buffer[16];
game.seek(0);
game.read(buffer, 16);
// Check for valid game headers
if (memcmp(buffer, "TADS2 bin\n\r\032", 12) == 0)
return 2;
else if (memcmp(buffer, "T3-image\r\n\032", 11) == 0)
return 3;
else
return -1;
}
} // End of namespace TADS
} // End of namespace Glk
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