167 lines
4.1 KiB
C++
167 lines
4.1 KiB
C++
/*
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* Copyright 2005-2014 Haiku, Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _DATA_IO_H
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#define _DATA_IO_H
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#include <SupportDefs.h>
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class BDataIO {
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public:
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BDataIO();
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virtual ~BDataIO();
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virtual ssize_t Read(void* buffer, size_t size);
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virtual ssize_t Write(const void* buffer, size_t size);
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virtual status_t Flush();
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status_t ReadExactly(void* buffer, size_t size,
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size_t* _bytesRead = NULL);
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status_t WriteExactly(const void* buffer, size_t size,
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size_t* _bytesWritten = NULL);
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private:
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BDataIO(const BDataIO&);
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BDataIO& operator=(const BDataIO&);
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virtual void _ReservedDataIO2();
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virtual void _ReservedDataIO3();
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virtual void _ReservedDataIO4();
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virtual void _ReservedDataIO5();
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virtual void _ReservedDataIO6();
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virtual void _ReservedDataIO7();
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virtual void _ReservedDataIO8();
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virtual void _ReservedDataIO9();
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virtual void _ReservedDataIO10();
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virtual void _ReservedDataIO11();
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virtual void _ReservedDataIO12();
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private:
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uint32 _reserved[2];
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};
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class BPositionIO : public BDataIO {
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public:
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BPositionIO();
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virtual ~BPositionIO();
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// BDataIO interface (implemented via ReadAt/WriteAt)
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virtual ssize_t Read(void* buffer, size_t size);
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virtual ssize_t Write(const void* buffer, size_t size);
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// BPositionIO interface
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virtual ssize_t ReadAt(off_t position, void* buffer,
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size_t size) = 0;
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virtual ssize_t WriteAt(off_t position, const void* buffer,
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size_t size) = 0;
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status_t ReadAtExactly(off_t position, void* buffer,
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size_t size, size_t* _bytesRead = NULL);
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status_t WriteAtExactly(off_t position,
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const void* buffer, size_t size,
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size_t* _bytesWritten = NULL);
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virtual off_t Seek(off_t position, uint32 seekMode) = 0;
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virtual off_t Position() const = 0;
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virtual status_t SetSize(off_t size);
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virtual status_t GetSize(off_t* size) const;
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private:
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virtual void _ReservedPositionIO2();
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virtual void _ReservedPositionIO3();
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virtual void _ReservedPositionIO4();
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virtual void _ReservedPositionIO5();
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virtual void _ReservedPositionIO6();
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virtual void _ReservedPositionIO7();
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virtual void _ReservedPositionIO8();
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virtual void _ReservedPositionIO9();
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virtual void _ReservedPositionIO10();
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virtual void _ReservedPositionIO11();
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virtual void _ReservedPositionIO12();
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private:
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uint32 _reserved[2];
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};
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class BMemoryIO : public BPositionIO {
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public:
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BMemoryIO(void* data, size_t length);
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BMemoryIO(const void* data, size_t length);
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virtual ~BMemoryIO();
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virtual ssize_t ReadAt(off_t position, void* buffer,
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size_t size);
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virtual ssize_t WriteAt(off_t position, const void* buffer,
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size_t size);
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virtual off_t Seek(off_t position, uint32 seekMode);
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virtual off_t Position() const;
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virtual status_t SetSize(off_t size);
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private:
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BMemoryIO(const BMemoryIO&);
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BMemoryIO& operator=(const BMemoryIO&);
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virtual void _ReservedMemoryIO1();
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virtual void _ReservedMemoryIO2();
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private:
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bool fReadOnly;
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char* fBuffer;
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size_t fLength;
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size_t fBufferSize;
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size_t fPosition;
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uint32 _reserved[1];
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};
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class BMallocIO : public BPositionIO {
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public:
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BMallocIO();
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virtual ~BMallocIO();
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virtual ssize_t ReadAt(off_t position, void* buffer,
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size_t size);
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virtual ssize_t WriteAt(off_t position, const void* buffer,
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size_t size);
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virtual off_t Seek(off_t position, uint32 seekMode);
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virtual off_t Position() const;
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virtual status_t SetSize(off_t size);
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// BMallocIO interface
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void SetBlockSize(size_t blockSize);
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const void* Buffer() const;
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size_t BufferLength() const;
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private:
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BMallocIO(const BMallocIO&);
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BMallocIO& operator=(const BMallocIO&);
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virtual void _ReservedMallocIO1();
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virtual void _ReservedMallocIO2();
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private:
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size_t fBlockSize;
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size_t fMallocSize;
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size_t fLength;
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char* fData;
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off_t fPosition;
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uint32 _reserved[1];
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};
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#endif // _DATA_IO_H
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