1// 2003-04-12  Paolo Carlini  <pcarlini at unitus dot it>
2
3// Copyright (C) 2003-2015 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// stdio_filebuf.h
21
22// { dg-require-fileio "" }
23
24#include <ext/stdio_filebuf.h>
25#include <cstdio>
26#include <fstream>
27#include <cstring>
28#include <testsuite_hooks.h>
29
30// Small stack-based buffers (i.e., using _M_unbuf) were not flushed
31// out by _M_really_overflow upon overflow.
32void test01()
33{
34  using namespace std;
35  bool test __attribute__((unused)) = true;
36
37  const char* name = "tmp_file1";
38  FILE* file = fopen(name, "w");
39  {
40    using namespace __gnu_cxx;
41    stdio_filebuf<char> sbuf(file, ios_base::out, 2);
42    sbuf.sputc('T');
43    sbuf.sputc('S');
44    sbuf.sputc('P');
45  }
46  fclose(file);
47
48  filebuf fbuf;
49  fbuf.open(name, ios_base::in);
50  char buf[10];
51  streamsize n = fbuf.sgetn(buf, sizeof(buf));
52  fbuf.close();
53
54  VERIFY( n == 3 );
55  VERIFY( !memcmp(buf, "TSP", 3) );
56}
57
58int main()
59{
60  test01();
61}
62