mps_installer.h

/* 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 MADS_MPS_INSTALLER_H
#define MADS_MPS_INSTALLER_H

#include "common/archive.h"
#include "common/ptr.h"
#include "common/stream.h"
#include "common/hashmap.h"
#include "common/hash-str.h"

namespace MADS {

class MpsInstaller : public Common::MemcachingCaseInsensitiveArchive {
public:
    bool hasFile(const Common::Path &path) const override;
    int listMembers(Common::ArchiveMemberList &) const override;
    const Common::ArchiveMemberPtr getMember(const Common::Path &path) const override;
    Common::SharedArchiveContents readContentsForPath(const Common::Path &translatedPath) const override;

    static MpsInstaller* open(const Common::Path &baseName);

private:
    // Similar to FileDescriptionBin but in native-endian and native strings.
    class FileDescriptor {
    public:
        // Public for hashmap
        FileDescriptor() : _compressedSize(0),
                   _uncompressedSize(),
                   _compressionAlgo(0),
                   _offsetInVolume(0),
                   _volumeNumber(0) {}
    protected:
        FileDescriptor(const Common::Path &name,
                   uint16 compression,
                   uint16 volumeNumber,
                   uint32 offsetInVolume,
                   uint32 compressedSize,
                   uint32 uncompressedSize) :
            _fileName(name),
            _compressionAlgo(compression),
            _volumeNumber(volumeNumber),
            _offsetInVolume(offsetInVolume),
            _compressedSize(compressedSize),
            _uncompressedSize(uncompressedSize) {}
        
        Common::Path _fileName;
        uint _compressionAlgo;
        uint _volumeNumber;
        uint32 _offsetInVolume;
        uint32 _compressedSize;
        uint32 _uncompressedSize;

        friend class MpsInstaller;
    };

    typedef Common::HashMap<Common::Path, FileDescriptor, Common::Path::IgnoreCase_Hash, Common::Path::IgnoreCase_EqualTo> FileMap;

    MpsInstaller(const FileMap& files,
             const Common::Path& baseName) : _files(files), _baseName(baseName) {}

    FileMap _files;
    Common::Path _baseName;
};
}

#endif