1/* Copyright (C) 2021-2024 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
27class DataStream : public Data_window
28{
29public:
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
45private:
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 */
52