1// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
2
3// Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// 27.8.1.4 Overridden virtual functions
22
23#include <fstream>
24#include <testsuite_hooks.h>
25#include <testsuite_io.h>
26
27// @require@ %-*.tst %-*.txt
28// @diff@ %-*.tst %*.txt
29
30const char name_01[] = "sgetc.txt"; // file with data in it
31
32// Test overloaded virtual functions.
33void test01()
34{
35  using namespace std;
36  using namespace __gnu_test;
37  typedef std::filebuf::int_type 	int_type;
38  typedef filebuf::traits_type 		traits_type;
39
40  bool test __attribute__((unused)) = true;
41  int_type 			        c1, c2, c3;
42
43  // int_type sungetc()
44  // if in_cur not avail, return pbackfail(), else decrement and
45  // return to_int_type(*gptr())
46
47  // in
48  {
49    constraint_filebuf fb_01;
50    fb_01.pubsetbuf(0, 0);
51    fb_01.open(name_01, ios::in);
52    VERIFY( fb_01.unbuffered() );
53    c1 = fb_01.sbumpc();
54    VERIFY( c1 == '/' );
55    c2 = fb_01.sungetc();
56    VERIFY( c2 == c1 );
57    c3 = fb_01.sgetc();
58    VERIFY( c3 == c2 );
59    fb_01.pubseekoff(2, ios_base::beg, ios_base::in);
60    c1 = fb_01.sgetc();
61    VERIFY( c1 == ' ' );
62    c2 = fb_01.sungetc();
63    VERIFY( c2 == traits_type::not_eof(traits_type::eof()) );
64    VERIFY( fb_01.unbuffered() );
65  }
66}
67
68int main()
69{
70  test01();
71  return 0;
72}
73