1// Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18// 27.6.2.4  basic_ostream seek members  [lib.ostream.seeks]
19// @require@ %-*.tst %-*.txt
20// @diff@ %-*.tst %-*.txt
21
22#include <ostream>
23#include <istream>
24#include <fstream>
25#include <cstdlib>
26#include <testsuite_hooks.h>
27
28const wchar_t* s = L" lootpack, peanut butter wolf, rob swift, madlib, quasimoto";
29const int times = 10;
30
31void write_rewind(std::wiostream& stream)
32{
33  bool test __attribute__((unused)) = true;
34
35  for (int j = 0; j < times; j++)
36    {
37      std::streampos begin = stream.tellp();
38
39      for (int i = 0; i < times; ++i)
40	stream << j << L'-' << i << s << L'\n';
41
42      stream.seekp(begin);
43    }
44  VERIFY( stream.good() );
45}
46
47void check_contents(std::wiostream& stream)
48{
49  bool test __attribute__((unused)) = true;
50
51  stream.clear();
52  stream.seekg(0, std::wios::beg);
53  int i = 0;
54  int loop = times * times + 2;
55  while (i < loop)
56    {
57      stream.ignore(80, L'\n');
58      if (stream.good())
59	++i;
60      else
61	break;
62    }
63  VERIFY( i == times );
64}
65
66// fstream
67// libstdc++/2346
68void test02()
69{
70  std::wfstream ofstrm;
71  ofstrm.open("wistream_seeks-3.txt", std::wios::out);
72  if (!ofstrm)
73    std::abort();
74  write_rewind(ofstrm);
75  ofstrm.close();
76
77  std::wfstream ifstrm;
78  ifstrm.open("wistream_seeks-3.txt", std::wios::in);
79  check_contents(ifstrm);
80  ifstrm.close();
81}
82
83int main()
84{
85  test02();
86  return 0;
87}
88