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/advsys/detection.h"
24 #include "glk/advsys/detection_tables.h"
25 #include "glk/advsys/game.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 AdvSys {
33
getSupportedGames(PlainGameList & games)34 void AdvSysMetaEngine::getSupportedGames(PlainGameList &games) {
35 for (const PlainGameDescriptor *pd = ADVSYS_GAME_LIST; pd->gameId; ++pd)
36 games.push_back(*pd);
37 }
38
findGame(const char * gameId)39 GameDescriptor AdvSysMetaEngine::findGame(const char *gameId) {
40 for (const PlainGameDescriptor *pd = ADVSYS_GAME_LIST; pd->gameId; ++pd) {
41 if (!strcmp(gameId, pd->gameId))
42 return *pd;
43 }
44
45 return GameDescriptor::empty();
46 }
47
detectGames(const Common::FSList & fslist,DetectedGames & gameList)48 bool AdvSysMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
49 const char *const EXTENSIONS[] = { ".dat", nullptr };
50
51 // Loop through the files of the folder
52 for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
53 // Check for a recognised filename
54 if (file->isDirectory())
55 continue;
56
57 Common::String filename = file->getName();
58 bool hasExt = false;
59 for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
60 hasExt = filename.hasSuffixIgnoreCase(*ext);
61 if (!hasExt)
62 continue;
63
64 Common::File gameFile;
65 if (!gameFile.open(*file))
66 continue;
67
68 Header hdr(&gameFile);
69 if (!hdr._valid)
70 continue;
71
72 gameFile.seek(0);
73 Common::String md5 = Common::computeStreamMD5AsString(gameFile, 5000);
74 uint32 filesize = gameFile.size();
75
76 // Scan through the AdvSys game list for a match
77 const GlkDetectionEntry *p = ADVSYS_GAMES;
78 while (p->_md5 && p->_filesize != filesize && md5 != p->_md5)
79 ++p;
80
81 if (!p->_gameId) {
82 const PlainGameDescriptor &desc = ADVSYS_GAME_LIST[0];
83 gameList.push_back(GlkDetectedGame(desc.gameId, desc.description, filename, md5, filesize));
84 } else {
85 // Found a match
86 PlainGameDescriptor gameDesc = findGame(p->_gameId);
87 gameList.push_back(GlkDetectedGame(p->_gameId, gameDesc.description, filename));
88 }
89 }
90
91 return !gameList.empty();
92 }
93
detectClashes(Common::StringMap & map)94 void AdvSysMetaEngine::detectClashes(Common::StringMap &map) {
95 for (const PlainGameDescriptor *pd = ADVSYS_GAME_LIST; pd->gameId; ++pd) {
96 if (map.contains(pd->gameId))
97 error("Duplicate game Id found - %s", pd->gameId);
98 map[pd->gameId] = "";
99 }
100 }
101
102 } // End of namespace AdvSys
103 } // End of namespace Glk
104