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engines/mm/shared/xeen/cc_archive.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.
+ *
+ * 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 MM_SHARED_XEEN_CC_ARCHIVE_H
+#define MM_SHARED_XEEN_CC_ARCHIVE_H
+
+#include "common/archive.h"
+#include "common/stream.h"
+
+namespace MM {
+namespace Shared {
+namespace Xeen {
+
+/**
+ * Details of a single entry in a CC file index
+ */
+struct CCEntry {
+	uint16 _id;
+	int _offset;
+	uint16 _size;
+	int _writeOffset;
+
+	CCEntry() : _id(0), _offset(0), _size(0), _writeOffset(0) {
+	}
+	CCEntry(uint16 id, uint32 offset, uint32 size)
+		: _id(id), _offset(offset), _size(size) {
+	}
+};
+
+/**
+ * Base Xeen CC file implementation
+ */
+class BaseCCArchive : public Common::Archive {
+protected:
+	Common::Array<CCEntry> _index;
+
+	/**
+	 * Load the index of a given CC file
+	 */
+	void loadIndex(Common::SeekableReadStream &stream);
+
+	/**
+	 * Saves out the contents of the index. Used when creating savegames
+	 */
+	void saveIndex(Common::WriteStream &stream);
+
+	/**
+	 * Given a resource name, returns whether an entry exists, and returns
+	 * the header index data for that entry
+	 */
+	virtual bool getHeaderEntry(const Common::Path &resourceName, CCEntry &ccEntry) const;
+
+	/**
+	 * Given a resource Id, returns whether an entry exists, and returns
+	 * the header index data for that entry
+	 */
+	virtual bool getHeaderEntry(uint16 id, CCEntry &ccEntry) const;
+public:
+	/**
+	 * Hash a given filename to produce the Id that represents it
+	 */
+	static uint16 convertNameToId(const Common::Path &resourceName);
+public:
+	BaseCCArchive() {
+	}
+
+	// Archive implementation
+	bool hasFile(const Common::Path &path) const override;
+	int listMembers(Common::ArchiveMemberList &list) const override;
+	const Common::ArchiveMemberPtr getMember(const Common::Path &path) const override;
+};
+
+/**
+ * Xeen CC file implementation
+ */
+class CCArchive : public BaseCCArchive {
+private:
+	Common::Path _filename;
+	Common::String _prefix;
+	bool _encoded;
+protected:
+	bool getHeaderEntry(const Common::Path &resourceName, CCEntry &ccEntry) const override;
+public:
+	CCArchive(const Common::Path &filename, bool encoded);
+	CCArchive(const Common::Path &filename, const Common::String &prefix, bool encoded);
+	~CCArchive() override;
+
+	// Archive implementation
+	Common::SeekableReadStream *createReadStreamForMember(const Common::Path &path) const override;
+};
+
+} // namespace Xeen
+} // namespace Shared
+} // namespace MM
+
+#endif