1// Copyright (C) 2003-2015 Free Software Foundation, Inc.
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// 27.8.1.4 Overridden virtual functions
19
20// { dg-require-fileio "" }
21
22#include <fstream>
23#include <cstdio>
24#include <cstring>
25#include <testsuite_hooks.h>
26
27// libstdc++/12875
28void test01()
29{
30  using namespace std;
31  bool test __attribute__((unused)) = true;
32
33  const char* name = "tmp_setbuf4";
34  static char buf[1024];
35
36  FILE* out = fopen(name, "w");
37  fputs("Hello, world", out);
38  fclose(out);
39
40  filebuf in;
41  in.open(name, ios_base::in);
42  char str[256];
43  streamsize r = in.sgetn(str, 6);
44  VERIFY( r == 6 );
45  VERIFY( !memcmp(str, "Hello,", 6) );
46  in.pubsetbuf(buf, 1024);
47  r = in.sgetn(str, 6);
48  VERIFY( r == 6 );
49  VERIFY( !memcmp(str, " world", 6) );
50  in.close();
51}
52
53// libstdc++/12875
54int main()
55{
56  test01();
57  return 0;
58}
59