e527b79631
* PackageFileHeap{Reader,Writer} as well as Package{Reader,Writer} and
their implementation and super classes do now internally use a
BPositionIO instead of a FD to access the package file. This provides
more flexibility needed for features to come.
* BPackageReader has already grown a new Init() version with a
BPositionIO* parameter.
101 lines
2.3 KiB
C++
101 lines
2.3 KiB
C++
/*
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* Copyright 2013, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _PACKAGE__HPKG__PRIVATE__PACKAGE_FILE_HEAP_WRITER_H_
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#define _PACKAGE__HPKG__PRIVATE__PACKAGE_FILE_HEAP_WRITER_H_
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#include <Array.h>
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#include <package/hpkg/PackageFileHeapAccessorBase.h>
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class BCompressionParameters;
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namespace BPrivate {
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template<typename Value> class RangeArray;
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}
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namespace BPackageKit {
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namespace BHPKG {
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class BDataReader;
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class BErrorOutput;
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namespace BPrivate {
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class PackageFileHeapReader;
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class PackageFileHeapWriter : public PackageFileHeapAccessorBase {
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public:
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PackageFileHeapWriter(BErrorOutput* errorOutput,
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BPositionIO* file, off_t heapOffset,
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CompressionAlgorithmOwner*
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compressionAlgorithm,
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DecompressionAlgorithmOwner*
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decompressionAlgorithm);
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~PackageFileHeapWriter();
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void Init();
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void Reinit(PackageFileHeapReader* heapReader);
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status_t AddData(BDataReader& dataReader, off_t size,
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uint64& _offset);
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void AddDataThrows(const void* buffer, size_t size);
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void RemoveDataRanges(
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const ::BPrivate::RangeArray<uint64>&
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ranges);
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// doesn't truncate the file
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status_t Finish();
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protected:
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virtual status_t ReadAndDecompressChunk(size_t chunkIndex,
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void* compressedDataBuffer,
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void* uncompressedDataBuffer);
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private:
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struct Chunk;
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struct ChunkSegment;
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struct ChunkBuffer;
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friend struct ChunkBuffer;
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private:
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void _Uninit();
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status_t _FlushPendingData();
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status_t _WriteChunk(const void* data, size_t size,
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bool mayCompress);
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status_t _WriteDataCompressed(const void* data,
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size_t size);
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status_t _WriteDataUncompressed(const void* data,
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size_t size);
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void _PushChunks(ChunkBuffer& chunkBuffer,
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uint64 startOffset, uint64 endOffset);
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void _UnwriteLastPartialChunk();
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private:
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void* fPendingDataBuffer;
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void* fCompressedDataBuffer;
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size_t fPendingDataSize;
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Array<uint64> fOffsets;
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CompressionAlgorithmOwner* fCompressionAlgorithm;
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};
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} // namespace BPrivate
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} // namespace BHPKG
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} // namespace BPackageKit
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#endif // _PACKAGE__HPKG__PRIVATE__PACKAGE_FILE_HEAP_WRITER_H_
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