1// { dg-require-fileio "" }
2
3// Copyright (C) 2010-2015 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library 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 along
17// with this library; see the file COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20// 27.8.1.4 Overridden virtual functions
21
22#include <fstream>
23#include <cstring>
24#include <testsuite_hooks.h>
25
26void test01()
27{
28  using namespace std;
29  bool test __attribute__((unused)) = true;
30
31  typedef filebuf::pos_type pos_type;
32  const char name[] = "tmp_seekoff-4.tst";
33
34  const size_t size = 12;
35  char buf[size];
36  streamsize n;
37
38  filebuf fb;
39  fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
40
41  n = fb.sputn("abcd", 4);
42  VERIFY( n == 4 );
43
44  fb.pubseekoff(0, ios_base::beg);
45  n = fb.sgetn(buf, 3);
46  VERIFY( n == 3 );
47  VERIFY( !memcmp(buf, "abc", 3) );
48
49  // Check read => write without pubseekoff(0, ios_base::cur)
50
51  n = fb.sputn("ef", 2);
52  VERIFY( n == 2 );
53
54  fb.pubseekoff(0, ios_base::beg);
55
56  n = fb.sgetn(buf, size);
57  VERIFY( n == 5 );
58  VERIFY( !memcmp(buf, "abcef", 5) );
59
60  fb.pubseekoff(0, ios_base::beg);
61  n = fb.sputn("gh", 2);
62  VERIFY( n == 2 );
63
64  // Check write => read without pubseekoff(0, ios_base::cur)
65
66  n = fb.sgetn( buf, 3 );
67  VERIFY( !memcmp(buf, "cef", 3) );
68
69  n = fb.sputn("ijkl", 4);
70  VERIFY( n == 4 );
71
72  fb.pubseekoff(0, ios_base::beg);
73  n = fb.sgetn(buf, 2);
74  VERIFY( n == 2 );
75  VERIFY( !memcmp(buf, "gh", 2) );
76
77  fb.pubseekoff(0, ios_base::end);
78  n = fb.sputn("mno", 3);
79  VERIFY( n == 3 );
80
81  fb.pubseekoff(0, ios_base::beg);
82  n = fb.sgetn(buf, size);
83  VERIFY( n == 12 );
84  VERIFY( !memcmp(buf, "ghcefijklmno", 12) );
85
86  fb.close();
87}
88
89int main()
90{
91  test01();
92  return 0;
93}
94