16e5e5e4ec
* BFDDataReader: Add SetFD(). * BBufferDataReader: Derive from BAbstractBufferedDataReader.
90 lines
1.7 KiB
C++
90 lines
1.7 KiB
C++
/*
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* Copyright 2009,2011, Haiku, Inc.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _PACKAGE__HPKG__DATA_READER_H_
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#define _PACKAGE__HPKG__DATA_READER_H_
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#include <SupportDefs.h>
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namespace BPackageKit {
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namespace BHPKG {
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class BDataOutput;
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class BDataReader {
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public:
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virtual ~BDataReader();
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virtual status_t ReadData(off_t offset, void* buffer,
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size_t size) = 0;
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};
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class BAbstractBufferedDataReader : public BDataReader {
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public:
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virtual ~BAbstractBufferedDataReader();
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virtual status_t ReadData(off_t offset, void* buffer,
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size_t size);
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virtual status_t ReadDataToOutput(off_t offset, size_t size,
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BDataOutput* output) = 0;
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};
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class BFDDataReader : public BDataReader {
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public:
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BFDDataReader(int fd);
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void SetFD(int fd);
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virtual status_t ReadData(off_t offset, void* buffer,
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size_t size);
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private:
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int fFD;
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};
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class BAttributeDataReader : public BDataReader {
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public:
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BAttributeDataReader(int fd,
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const char* attribute, uint32 type);
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virtual status_t ReadData(off_t offset, void* buffer,
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size_t size);
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private:
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int fFD;
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uint32 fType;
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const char* fAttribute;
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};
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class BBufferDataReader : public BAbstractBufferedDataReader {
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public:
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BBufferDataReader(const void* data, size_t size);
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virtual status_t ReadData(off_t offset, void* buffer,
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size_t size);
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virtual status_t ReadDataToOutput(off_t offset, size_t size,
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BDataOutput* output);
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private:
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const void* fData;
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size_t fSize;
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};
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} // namespace BHPKG
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} // namespace BPackageKit
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#endif // _PACKAGE__HPKG__DATA_READER_H_
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