src/bin/makeudfimage/PositionIOStream.h

   1 //----------------------------------------------------------------------
   2 //  This software is part of the OpenBeOS distribution and is covered
   3 //  by the MIT License.
   4 //
   5 //  Copyright (c) 2003 Tyler Dauwalder, tyler@dauwalder.net
   6 //----------------------------------------------------------------------
   7
   8 /*! \file PositionIOStream.h
   9 */
  10
  11 #ifndef _POSITION_IO_STREAM_H
  12 #define _POSITION_IO_STREAM_H
  13
  14 #include <DataIO.h>
  15
  16 #include "DataStream.h"
  17
  18 /*! \brief      DataStream implementation that writes to a BPositionIO.
  19 */
  20 class PositionIOStream : public DataStream {
  21 public:
  22         PositionIOStream(BPositionIO &stream);
  23         virtual status_t InitCheck() const { return B_OK; }
  24
  25         static const size_t kBufferSize = 32 * 1024;
  26
  27         virtual ssize_t Read(void *buffer, size_t size);
  28         virtual ssize_t ReadAt(off_t pos, void *buffer, size_t size);
  29
  30         virtual ssize_t Write(const void *buffer, size_t size);
  31         virtual ssize_t WriteAt(off_t pos, const void *buffer, size_t size);
  32
  33         virtual ssize_t Write(BDataIO &data, size_t size);
  34         virtual ssize_t WriteAt(off_t pos, BDataIO &data, size_t size);
  35
  36         virtual ssize_t Zero(size_t size);
  37         virtual ssize_t ZeroAt(off_t pos, size_t size);
  38
  39         virtual off_t Seek(off_t position, uint32 seek_mode);
  40         virtual off_t Position() const;
  41
  42         virtual status_t SetSize(off_t size);
  43 private:
  44         BPositionIO &fStream;
  45 };
  46
  47 #endif  // _POSITION_IO_STREAM_H