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126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef ZVISION_ZFS_ARCHIVE_H
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#define ZVISION_ZFS_ARCHIVE_H
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#include "common/archive.h"
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#include "common/hashmap.h"
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#include "common/hash-str.h"
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namespace Common {
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class String;
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}
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namespace ZVision {
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struct ZfsHeader {
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uint32 magic;
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uint32 unknown1;
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uint32 maxNameLength;
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uint32 filesPerBlock;
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uint32 fileCount;
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uint8 xorKey[4];
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uint32 fileSectionOffset;
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};
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struct ZfsEntryHeader {
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Common::String name;
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uint32 offset;
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uint32 id;
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uint32 size;
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uint32 time;
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uint32 unknown;
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};
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typedef Common::HashMap<Common::String, ZfsEntryHeader *, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> ZfsEntryHeaderMap;
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class ZfsArchive : public Common::Archive {
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public:
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ZfsArchive(const Common::String &fileName);
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ZfsArchive(const Common::String &fileName, Common::SeekableReadStream *stream);
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~ZfsArchive() override;
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/**
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* Check if a member with the given name is present in the Archive.
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* Patterns are not allowed, as this is meant to be a quick File::exists()
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* replacement.
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*/
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bool hasFile(const Common::String &fileName) const override;
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/**
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* Add all members of the Archive to list.
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* Must only append to list, and not remove elements from it.
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*
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* @return The number of names added to list
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*/
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int listMembers(Common::ArchiveMemberList &list) const override;
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/**
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* Returns a ArchiveMember representation of the given file.
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*/
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const Common::ArchiveMemberPtr getMember(const Common::String &name) const override;
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/**
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* Create a stream bound to a member with the specified name in the
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* archive. If no member with this name exists, 0 is returned.
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*
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* @return The newly created input stream
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*/
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Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const override;
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private:
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const Common::String _fileName;
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ZfsHeader _header;
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ZfsEntryHeaderMap _entryHeaders;
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/**
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* Parses the zfs file into file entry headers that can be used later
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* to get the entry data.
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*
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* @param stream The contents of the zfs file
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*/
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void readHeaders(Common::SeekableReadStream *stream);
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/**
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* Entry names are contained within a 16 byte block. This reads the block
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* and converts it the name to a Common::String
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*
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* @param stream The zfs file stream
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* @return The entry file name
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*/
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Common::String readEntryName(Common::SeekableReadStream *stream) const;
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/**
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* ZFS file entries can be encrypted using XOR encoding. This method
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* decodes the buffer in place using the supplied xorKey.
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*
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* @param buffer The data to decode
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* @param length Length of buffer
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*/
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void unXor(byte *buffer, uint32 length, const byte *xorKey) const;
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};
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} // End of namespace ZVision
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#endif
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