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engines/sword2/resman.h

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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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1994-1998 Revolution Software Ltd.
+ *
+ * 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/>.
+ */
+
+#ifndef	SWORD2_RESMAN_H
+#define	SWORD2_RESMAN_H
+
+namespace Common {
+class File;
+}
+
+#define MAX_MEM_CACHE (8 * 1024 * 1024) // we keep up to 8 megs of resource data files in memory
+#define	MAX_res_files 20
+
+namespace Sword2 {
+
+class Sword2Engine;
+
+struct Resource {
+	byte *ptr;
+	uint32 size;
+	uint32 refCount;
+	Resource *next, *prev;
+};
+
+struct ResourceFile {
+	char fileName[20];
+	int32 numEntries;
+	uint32 *entryTab;
+	uint8 cd;
+};
+
+class ResourceManager {
+private:
+	Common::File *openCluFile(uint16 fileNum);
+	void readCluIndex(uint16 fileNum, Common::File *file);
+	void removeFromCacheList(Resource *res);
+	void addToCacheList(Resource *res);
+	void checkMemUsage();
+
+	Sword2Engine *_vm;
+
+	int _curCD;
+	uint32 _totalResFiles;
+	uint32 _totalClusters;
+
+	// Gode generated res-id to res number/rel number conversion table
+
+	uint16 *_resConvTable;
+	ResourceFile _resFiles[MAX_res_files];
+	Resource *_resList;
+
+	Resource *_cacheStart, *_cacheEnd;
+	uint32 _usedMem; // amount of used memory in bytes
+
+public:
+	ResourceManager(Sword2Engine *vm);	// read in the config file
+	~ResourceManager();
+
+	bool init();
+
+	uint32 getNumResFiles() { return _totalResFiles; }
+	uint32 getNumClusters() { return _totalClusters; }
+	ResourceFile *getResFiles() { return _resFiles; }
+	Resource *getResList() { return _resList; }
+
+	byte *openResource(uint32 res, bool dump = false);
+	void closeResource(uint32 res);
+
+	bool checkValid(uint32 res);
+	uint32 fetchLen(uint32 res);
+	uint8 fetchType(byte *ptr);
+	uint8 fetchType(uint32 res) {
+		byte *ptr = openResource(res);
+		uint8 type = fetchType(ptr);
+		closeResource(res);
+
+		return type;
+	}
+
+	byte *fetchName(uint32 res, byte *buf = nullptr) {
+		static byte tempbuf[NAME_LEN];
+
+		if (!buf)
+			buf = tempbuf;
+
+		byte *ptr = openResource(res);
+		memcpy(buf, ptr + 10, NAME_LEN);
+		closeResource(res);
+
+		return buf;
+	}
+
+	byte *fetchName(byte *ptr) {
+		return ptr + 10;
+	}
+
+	// Prompts the user for the specified CD.
+	void askForCD(int cd);
+
+	void setCD(int cd) {
+		if (cd)
+			_curCD = cd;
+	}
+
+	int getCD() {
+		return _curCD;
+	}
+
+	void remove(int res);
+	void removeAll();
+
+	// ----console commands
+
+	void killAll(bool wantInfo);
+	void killAllObjects(bool wantInfo);
+};
+
+} // End of namespace Sword2
+
+#endif