1  /* Copyright (C) 2021-2023 Free Software Foundation, Inc.
       2     Contributed by Oracle.
       3  
       4     This file is part of GNU Binutils.
       5  
       6     This program is free software; you can redistribute it and/or modify
       7     it under the terms of the GNU General Public License as published by
       8     the Free Software Foundation; either version 3, or (at your option)
       9     any later version.
      10  
      11     This program is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU General Public License for more details.
      15  
      16     You should have received a copy of the GNU General Public License
      17     along with this program; if not, write to the Free Software
      18     Foundation, 51 Franklin Street - Fifth Floor, Boston,
      19     MA 02110-1301, USA.  */
      20  
      21  #ifndef _DATASTREAM_H
      22  #define _DATASTREAM_H
      23  
      24  #include "Data_window.h"
      25  
      26  // sequential access to the file
      27  class DataStream : public Data_window
      28  {
      29  public:
      30    // Create an empty data window.
      31    DataStream (char *file_name);
      32    ~DataStream ();
      33    void set_span (int64_t f_offset, int64_t sz);
      34    int64_t read (void *buf, int64_t len);
      35  
      36    template <typename Key_t> inline int64_t
      37    read (Key_t &val)
      38    {
      39      int64_t sz = read (&val, sizeof (val));
      40      if (need_swap_endian && sz == sizeof (val))
      41        swapByteOrder (&val, sizeof (val));
      42      return sz;
      43    }
      44  
      45  private:
      46    int64_t span_offset;
      47    int64_t span_size;        // the window size
      48    int64_t span_fileoffset;  // the window begin on the file
      49  };
      50  
      51  #endif /* _DATASTREAM_H */