103 lines
2.9 KiB
C++
103 lines
2.9 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef GOT_UTILS_RES_ARCHIVE_H
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#define GOT_UTILS_RES_ARCHIVE_H
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#include "common/archive.h"
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#include "common/stream.h"
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namespace Got {
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struct ResHeader {
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Common::String _name;
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uint32 _offset = 0;
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uint32 _size = 0;
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uint32 _originalSize = 0;
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int _key = 0;
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void load(Common::SeekableReadStream *src);
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};
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#define RES_MAX_ENTRIES 256 // Max # of elements
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#define RES_HEADER_ENTRY_SIZE 23 // Size of a single header entry
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class ResArchive : public Common::Archive {
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private:
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Common::Array<ResHeader> _headers;
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/**
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* Decrypts a passed buffer
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* @param buf Pointer to buffer
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* @param len Buffer size
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* @param key Starting key to use for decryption
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*/
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void decrypt(byte *buf, size_t len, byte key) const;
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/**
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* Decodes a passed buffer
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*/
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void lzssDecompress(const byte *src, byte *dest) const;
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/**
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* Returns the index of a header for a given filename
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*/
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int indexOf(const Common::String &name) const;
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public:
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/**
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* Constructor
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*/
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ResArchive();
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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::Path &path) 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::Path &path) 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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* @return the newly created input stream
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*/
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Common::SeekableReadStream *createReadStreamForMember(const Common::Path &path) const override;
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};
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extern void resInit();
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} // namespace Got
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#endif
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