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engines/mtropolis/vfs.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 MTROPOLIS_VFS_H
+#define MTROPOLIS_VFS_H
+
+#include "common/archive.h"
+#include "common/hash-str.h"
+
+namespace MTropolis {
+
+struct VirtualFileSystemLayout {
+	VirtualFileSystemLayout();
+
+	struct PathJunction {
+		Common::String _srcPath;
+		Common::String _destPath;
+	};
+
+	struct ArchiveJunction {
+		Common::String _archiveName;
+		Common::Archive *_archive;
+	};
+
+	char _pathSeparator;
+	Common::Path _workspaceRoot;
+
+	Common::Array<PathJunction> _pathJunctions;
+	Common::Array<ArchiveJunction> _archiveJunctions;
+	Common::Array<Common::String> _exclusions;
+};
+
+class VirtualFileSystem : public Common::Archive {
+public:
+	explicit VirtualFileSystem(const VirtualFileSystemLayout &layout);
+
+	bool hasFile(const Common::Path &path) const override;
+	bool isPathDirectory(const Common::Path &path) const override;
+	int listMembers(Common::ArchiveMemberList &list) const override;
+	const Common::ArchiveMemberPtr getMember(const Common::Path &path) const override;
+	Common::SeekableReadStream *createReadStreamForMember(const Common::Path &path) const override;
+
+	Common::SeekableReadStream *createReadStreamForMemberAltStream(const Common::Path &path, Common::AltStreamType altStreamType) const override;
+
+	int listMatchingMembers(Common::ArchiveMemberList &list, const Common::Path &pattern, bool matchPathComponents = false) const override;
+
+	char getPathSeparator() const override;
+
+private:
+	struct VirtualFile {
+		Common::Path _virtualPath;
+		Common::ArchiveMemberPtr _archiveMember;
+
+		Common::ArchiveMemberPtr _vfsArchiveMember;
+	};
+
+	struct TempLayoutFile {
+		Common::String _expandedPath;
+		Common::String _expandedPathCanonical;
+		Common::ArchiveMemberPtr _archiveMember;
+	};
+
+	class VFSArchiveMember : public Common::ArchiveMember {
+	public:
+		VFSArchiveMember(const VirtualFile *virtualFile, char pathSeparator);
+
+		Common::SeekableReadStream *createReadStream() const override;
+		Common::SeekableReadStream *createReadStreamForAltStream(Common::AltStreamType altStreamType) const override;
+
+		Common::String getName() const override;
+
+		Common::Path getPathInArchive() const override;
+		Common::String getFileName() const override;
+		bool isDirectory() const override;
+		void listChildren(Common::ArchiveMemberList &childList, const char *pattern) const override;
+		Common::U32String getDisplayName() const override;
+		bool isInMacArchive() const override;
+
+	private:
+		const VirtualFile *_virtualFile;
+		char _pathSeparator;
+	};
+
+	const VirtualFile *getVirtualFile(const Common::Path &path) const;
+	static bool sortVirtualFiles(const VirtualFile &a, const VirtualFile &b);
+
+	Common::String canonicalizePath(const Common::Path &path) const;
+
+	char _pathSeparator;
+	Common::Path _workspaceRoot;
+
+	Common::Array<VirtualFile> _virtualFiles;
+	Common::HashMap<Common::String, uint> _pathToVirtualFileIndex;
+};
+
+} // End of namespace MTropolis
+
+#endif