1// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
2
3// Copyright (C) 2001, 2002, 2003, 2009 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// { dg-require-fileio "" }
23
24#include <fstream>
25#include <testsuite_hooks.h>
26#include <testsuite_io.h>
27
28// @require@ %-*.tst %-*.txt
29// @diff@ %-*.tst %*.txt
30
31const char name_01[] = "sgetc.txt"; // file with data in it
32
33// Test overloaded virtual functions.
34void test01()
35{
36  using namespace std;
37  using namespace __gnu_test;
38  typedef std::filebuf::int_type 	int_type;
39  typedef filebuf::traits_type 		traits_type;
40
41  bool test __attribute__((unused)) = true;
42  int_type 			        c1, c2, c3;
43
44  // int_type sungetc()
45  // if in_cur not avail, return pbackfail(), else decrement and
46  // return to_int_type(*gptr())
47
48  // in
49  {
50    constraint_filebuf fb_01;
51    fb_01.pubsetbuf(0, 0);
52    fb_01.open(name_01, ios::in);
53    VERIFY( fb_01.unbuffered() );
54    c1 = fb_01.sbumpc();
55    VERIFY( c1 == '/' );
56    c2 = fb_01.sungetc();
57    VERIFY( c2 == c1 );
58    c3 = fb_01.sgetc();
59    VERIFY( c3 == c2 );
60    fb_01.pubseekoff(2, ios_base::beg, ios_base::in);
61    c1 = fb_01.sgetc();
62    VERIFY( c1 == ' ' );
63    c2 = fb_01.sungetc();
64    VERIFY( c2 == traits_type::not_eof(traits_type::eof()) );
65    VERIFY( fb_01.unbuffered() );
66  }
67}
68
69int main()
70{
71  test01();
72  return 0;
73}
74