1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #include "glk/glulx/detection.h"
24 #include "glk/glulx/detection_tables.h"
25 #include "glk/blorb.h"
26 #include "common/debug.h"
27 #include "common/file.h"
28 #include "common/md5.h"
29 #include "engines/game.h"
30
31 namespace Glk {
32 namespace Glulx {
33
getSupportedGames(PlainGameList & games)34 void GlulxMetaEngine::getSupportedGames(PlainGameList &games) {
35 for (const PlainGameDescriptor *pd = GLULXE_GAME_LIST; pd->gameId; ++pd) {
36 games.push_back(*pd);
37 }
38 }
39
findGame(const char * gameId)40 GameDescriptor GlulxMetaEngine::findGame(const char *gameId) {
41 for (const PlainGameDescriptor *pd = GLULXE_GAME_LIST; pd->gameId; ++pd) {
42 if (!strcmp(gameId, pd->gameId)) {
43 GameDescriptor gd = *pd;
44 gd._supportLevel = kTestingGame;
45 return gd;
46 }
47 }
48
49 return GameDescriptor::empty();
50 }
51
detectGames(const Common::FSList & fslist,DetectedGames & gameList)52 bool GlulxMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
53 const char *const EXTENSIONS[] = { ".ulx", nullptr };
54
55 // Loop through the files of the folder
56 for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
57 // Check for a recognised filename
58 if (file->isDirectory())
59 continue;
60 Common::String filename = file->getName();
61 bool hasExt = Blorb::hasBlorbExt(filename), isBlorb = false;
62 for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
63 hasExt = filename.hasSuffixIgnoreCase(*ext);
64 if (!hasExt)
65 continue;
66
67 // Open up the file and calculate the md5
68 Common::File gameFile;
69 if (!gameFile.open(*file))
70 continue;
71 Common::String md5 = Common::computeStreamMD5AsString(gameFile, 5000);
72 size_t filesize = gameFile.size();
73 gameFile.seek(0);
74 isBlorb = Blorb::isBlorb(gameFile, ID_GLUL);
75 gameFile.close();
76
77 if (!isBlorb && Blorb::hasBlorbExt(filename))
78 continue;
79
80 // Check for known games
81 const GlkDetectionEntry *p = GLULXE_GAMES;
82 while (p->_gameId && (md5 != p->_md5 || filesize != p->_filesize))
83 ++p;
84
85 if (!p->_gameId) {
86 const PlainGameDescriptor &desc = GLULXE_GAME_LIST[0];
87 gameList.push_back(GlkDetectedGame(desc.gameId, desc.description, filename, md5, filesize));
88 } else {
89 PlainGameDescriptor gameDesc = findGame(p->_gameId);
90 DetectedGame gd = DetectedGame("glk", p->_gameId, gameDesc.description, p->_language, Common::kPlatformUnknown, p->_extra);
91
92 gd.addExtraEntry("filename", filename);
93 gameList.push_back(gd);
94 }
95 }
96
97 return !gameList.empty();
98 }
99
detectClashes(Common::StringMap & map)100 void GlulxMetaEngine::detectClashes(Common::StringMap &map) {
101 for (const PlainGameDescriptor *pd = GLULXE_GAME_LIST; pd->gameId; ++pd) {
102 if (map.contains(pd->gameId))
103 error("Duplicate game Id found - %s", pd->gameId);
104 map[pd->gameId] = "";
105 }
106 }
107
108 } // End of namespace Glulx
109 } // End of namespace Glk
110