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stuffit.h

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00001 /* ResidualVM - A 3D game interpreter
00002  *
00003  * ResidualVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the AUTHORS
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #ifndef GRIM_STUFFIT_H
00024 #define GRIM_STUFFIT_H
00025 
00026 #include "common/archive.h"
00027 #include "common/bitstream.h"
00028 #include "common/scummsys.h"
00029 #include "common/endian.h"
00030 #include "common/file.h"
00031 #include "common/hash-str.h"
00032 #include "common/hashmap.h"
00033 #include "common/str.h"
00034 
00035 namespace Grim {
00036 
00037 struct SIT14Data;
00038 
00039 class StuffItArchive : public Common::Archive {
00040 public:
00041     StuffItArchive();
00042     ~StuffItArchive();
00043 
00044     bool open(const Common::String &filename);
00045     void close();
00046     bool isOpen() const { return _stream != 0; }
00047 
00048     // Common::Archive API implementation
00049     bool hasFile(const Common::String &name) const override;
00050     int listMembers(Common::ArchiveMemberList &list) const override;
00051     const Common::ArchiveMemberPtr getMember(const Common::String &name) const override;
00052     Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const override;
00053 
00054 private:
00055     struct FileEntry {
00056         byte compression;
00057         uint32 uncompressedSize;
00058         uint32 compressedSize;
00059         uint32 offset;
00060     };
00061 
00062     Common::SeekableReadStream *_stream;
00063 
00064     typedef Common::HashMap<Common::String, FileEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> FileMap;
00065     FileMap _map;
00066 
00067     // Decompression Functions
00068     Common::SeekableReadStream *decompress14(Common::SeekableReadStream *src, uint32 uncompressedSize) const;
00069 
00070     // Decompression Helpers
00071     void update14(uint16 first, uint16 last, byte *code, uint16 *freq) const;
00072     void readTree14(Common::BitStream8LSB *bits, SIT14Data *dat, uint16 codesize, uint16 *result) const;
00073 };
00074 
00075 } // End of namespace Grim
00076 
00077 #endif


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