/*
 * Copyright 2013, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef _PACKAGE__HPKG__PRIVATE__PACKAGE_FILE_HEAP_READER_H_
#define _PACKAGE__HPKG__PRIVATE__PACKAGE_FILE_HEAP_READER_H_


#include <Array.h>
#include <package/hpkg/PackageFileHeapAccessorBase.h>


namespace BPackageKit {

namespace BHPKG {


class BDataReader;
class BErrorOutput;


namespace BPrivate {


class PackageFileHeapReader : public PackageFileHeapAccessorBase {
public:
                                                                PackageFileHeapReader(BErrorOutput* errorOutput,
                                                                        BPositionIO* file, off_t heapOffset,
                                                                        off_t compressedHeapSize,
                                                                        uint64 uncompressedHeapSize,
                                                                        DecompressionAlgorithmOwner*
                                                                                decompressionAlgorithm);
                                                                ~PackageFileHeapReader();

                        status_t                        Init();

                        PackageFileHeapReader* Clone() const;

                        const OffsetArray&      Offsets() const
                                                                        { return fOffsets; }

protected:
        virtual status_t                        ReadAndDecompressChunk(size_t chunkIndex,
                                                                        void* compressedDataBuffer,
                                                                        void* uncompressedDataBuffer,
                                                                        iovec* scratchBuffer = NULL);

private:
                        OffsetArray                     fOffsets;
};


}       // namespace BPrivate

}       // namespace BHPKG

}       // namespace BPackageKit


#endif  // _PACKAGE__HPKG__PRIVATE__PACKAGE_FILE_HEAP_READER_H_