From b37a41286099faf4a36e73e69b377022345091e7 Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Thu, 27 Dec 2018 13:20:53 +0200
Subject: GLK: ALAN2: Initial skeleton sub-engine

---
 engines/glk/alan2/detection.cpp | 118 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 engines/glk/alan2/detection.cpp

(limited to 'engines/glk/alan2/detection.cpp')

diff --git a/engines/glk/alan2/detection.cpp b/engines/glk/alan2/detection.cpp
new file mode 100644
index 0000000000..f4be3f1c16
--- /dev/null
+++ b/engines/glk/alan2/detection.cpp
@@ -0,0 +1,118 @@
+/* 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/alan2/detection.h"
+#include "glk/alan2/detection_tables.h"
+#include "common/debug.h"
+#include "common/file.h"
+#include "common/md5.h"
+#include "engines/game.h"
+
+namespace Glk {
+namespace Alan2 {
+
+void Alan2MetaEngine::getSupportedGames(PlainGameList &games) {
+	for (const Alan2Descriptor *pd = ALAN2_GAME_LIST; pd->gameId; ++pd) {
+		games.push_back(*pd);
+	}
+}
+
+Alan2Descriptor Alan2MetaEngine::findGame(const char *gameId) {
+	for (const Alan2Descriptor *pd = ALAN2_GAME_LIST; pd->gameId; ++pd) {
+		if (!strcmp(gameId, pd->gameId))
+			return *pd;
+	}
+
+	return Alan2Descriptor();
+}
+
+bool Alan2MetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
+	const char *const EXTENSIONS[3] = { ".acd", ".dat" };
+
+	// 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 = false;
+		for (int idx = 0; idx < 3 && !hasExt; ++idx)
+			hasExt = filename.hasSuffixIgnoreCase(EXTENSIONS[idx]);
+		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.close();
+
+		// Check for known games
+		const Alan2GameDescription *p = ALAN2_GAMES;
+		while (p->_gameId && (md5 != p->_md5 || filesize != p->_filesize))
+			++p;
+
+		DetectedGame gd;
+		if (!p->_gameId) {
+			if (filename.hasSuffixIgnoreCase(".dat"))
+				continue;
+
+			if (gDebugLevel > 0) {
+				// Print an entry suitable for putting into the detection_tables.h, using the
+				// name of the parent folder the game is in as the presumed game Id
+				Common::String folderName = file->getParent().getName();
+				if (folderName.hasSuffix("\\"))
+					folderName.deleteLastChar();
+				Common::String fname = filename;
+				const char *dot = strchr(fname.c_str(), '.');
+				if (dot)
+					fname = Common::String(fname.c_str(), dot);
+
+				debug("ENTRY0(\"%s\", \"%s\", %u),", fname.c_str(), md5.c_str(), (uint)filesize);
+			}
+			const PlainGameDescriptor &desc = ALAN2_GAME_LIST[0];
+			gd = DetectedGame(desc.gameId, desc.description, Common::UNK_LANG, Common::kPlatformUnknown);
+		} else {
+			PlainGameDescriptor gameDesc = findGame(p->_gameId);
+			gd = DetectedGame(p->_gameId, gameDesc.description, p->_language, Common::kPlatformUnknown, p->_extra);
+			gd.setGUIOptions(GUIO4(GUIO_NOSPEECH, GUIO_NOSFX, GUIO_NOMUSIC, GUIO_NOSUBTITLES));
+		}
+
+		gd.addExtraEntry("filename", filename);
+		gameList.push_back(gd);
+	}
+
+	return !gameList.empty();
+}
+
+void Alan2MetaEngine::detectClashes(Common::StringMap &map) {
+	for (const Alan2Descriptor *pd = ALAN2_GAME_LIST; pd->gameId; ++pd) {
+		if (map.contains(pd->gameId))
+			error("Duplicate game Id found - %s", pd->gameId);
+		map[pd->gameId] = "";
+	}
+}
+
+} // End of namespace Alan2
+} // End of namespace Glk
-- 
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