74 lines
1.5 KiB
C++
74 lines
1.5 KiB
C++
/******************************************************************************
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/
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/ File: BufferIO.h
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/
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/ Description: A buffered adapter for BPositionIO
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/
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/ Copyright 1998, Be Incorporated
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/
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******************************************************************************/
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#if !defined(_BUFFER_IO_H)
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#define _BUFFER_IO_H
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#include <DataIO.h>
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class BBufferIO : public BPositionIO
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{
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public:
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enum {
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DEFAULT_BUF_SIZE = 65536L
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};
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BBufferIO(
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BPositionIO * stream,
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size_t buf_size = DEFAULT_BUF_SIZE,
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bool owns_stream = true);
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virtual ~BBufferIO();
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virtual ssize_t ReadAt(
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off_t pos,
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void *buffer,
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size_t size);
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virtual ssize_t WriteAt(
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off_t pos,
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const void *buffer,
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size_t size);
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virtual off_t Seek(
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off_t position,
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uint32 seek_mode);
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virtual off_t Position() const;
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virtual status_t SetSize(
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off_t size);
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virtual status_t Flush();
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BPositionIO * Stream() const;
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size_t BufferSize() const;
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bool OwnsStream() const;
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void SetOwnsStream(
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bool owns_stream);
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void PrintToStream() const;
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private:
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off_t m_buffer_start;
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BPositionIO * m_stream;
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char * m_buffer;
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size_t m_buffer_phys;
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size_t m_buffer_used;
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uint32 _reserved_ints[6];
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bool m_buffer_dirty;
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bool m_owns_stream;
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bool _reserved_bools[6];
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virtual status_t _Reserved_BufferIO_0(void *);
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virtual status_t _Reserved_BufferIO_1(void *);
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virtual status_t _Reserved_BufferIO_2(void *);
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virtual status_t _Reserved_BufferIO_3(void *);
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virtual status_t _Reserved_BufferIO_4(void *);
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};
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#endif /* _BUFFER_IO_H */
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