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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 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.
+ *
+ */
+
+#ifndef ZVISION_ZFS_ARCHIVE_H
+#define ZVISION_ZFS_ARCHIVE_H
+
+#include "common/archive.h"
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+
+namespace Common {
+class String;
+}
+
+namespace ZVision {
+
+struct ZfsHeader {
+ uint32 magic;
+ uint32 unknown1;
+ uint32 maxNameLength;
+ uint32 filesPerBlock;
+ uint32 fileCount;
+ uint8 xorKey[4];
+ uint32 fileSectionOffset;
+};
+
+struct ZfsEntryHeader {
+ Common::String name;
+ uint32 offset;
+ uint32 id;
+ uint32 size;
+ uint32 time;
+ uint32 unknown;
+};
+
+typedef Common::HashMap<Common::String, ZfsEntryHeader *, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> ZfsEntryHeaderMap;
+
+class ZfsArchive : public Common::Archive {
+public:
+ ZfsArchive(const Common::String &fileName);
+ ZfsArchive(const Common::String &fileName, Common::SeekableReadStream *stream);
+ ~ZfsArchive();
+
+ /**
+ * Check if a member with the given name is present in the Archive.
+ * Patterns are not allowed, as this is meant to be a quick File::exists()
+ * replacement.
+ */
+ bool hasFile(const Common::String &fileName) const;
+
+ /**
+ * Add all members of the Archive to list.
+ * Must only append to list, and not remove elements from it.
+ *
+ * @return The number of names added to list
+ */
+ int listMembers(Common::ArchiveMemberList &list) const;
+
+ /**
+ * Returns a ArchiveMember representation of the given file.
+ */
+ const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
+
+ /**
+ * Create a stream bound to a member with the specified name in the
+ * archive. If no member with this name exists, 0 is returned.
+ *
+ * @return The newly created input stream
+ */
+ Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
+
+private:
+ const Common::String _fileName;
+ ZfsHeader _header;
+ ZfsEntryHeaderMap _entryHeaders;
+
+ /**
+ * Parses the zfs file into file entry headers that can be used later
+ * to get the entry data.
+ *
+ * @param stream The contents of the zfs file
+ */
+ void readHeaders(Common::SeekableReadStream *stream);
+
+ /**
+ * Entry names are contained within a 16 byte block. This reads the block
+ * and converts it the name to a Common::String
+ *
+ * @param stream The zfs file stream
+ * @return The entry file name
+ */
+ Common::String readEntryName(Common::SeekableReadStream *stream) const;
+
+ /**
+ * ZFS file entries can be encrypted using XOR encoding. This method
+ * decodes the buffer in place using the supplied xorKey.
+ *
+ * @param buffer The data to decode
+ * @param length Length of buffer
+ */
+ void unXor(byte *buffer, uint32 length, const byte *xorKey) const;
+};
+
+} // End of namespace ZVision
+
+#endif