1// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
2
3// Copyright (C) 2001-2015 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// 27.8.1.4 Overridden virtual functions
21
22#include <fstream>
23#include <testsuite_hooks.h>
24
25// @require@ %-*.tst %-*.txt
26// @diff@ %-*.tst %*.txt
27
28// NB: This test assumes that _M_buf_size == 40, and not the usual
29// buffer_size length of BUFSIZ (8192), so that overflow/underflow can be
30// simulated a bit more readily.
31// NRB (Nota Really Bene): setting it to 40 breaks the test, as intended.
32const int buffer_size = 8192;
33//const int buffer_size = 40;
34
35const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
36const char name_02[] = "filebuf_virtuals-2.txt"; // empty file, need to create
37const char name_03[] = "filebuf_virtuals-3.txt"; // empty file, need to create
38
39class derived_filebuf: public std::filebuf
40{
41 public:
42  void
43  set_size(int_type __size) { _M_buf_size = __size; }
44};
45
46derived_filebuf fb_01; // in
47derived_filebuf fb_02; // out
48derived_filebuf fb_03; // in | out
49
50// Initialize filebufs to be the same size regardless of platform.
51void test03()
52{
53  fb_01.set_size(buffer_size);
54  fb_02.set_size(buffer_size);
55  fb_03.set_size(buffer_size);
56}
57
58// Test overloaded virtual functions.
59void test05()
60{
61  typedef std::filebuf::int_type 	int_type;
62  typedef std::filebuf::traits_type 	traits_type;
63  typedef std::filebuf::pos_type 	pos_type;
64  typedef std::filebuf::off_type 	off_type;
65  typedef size_t 			size_type;
66
67  bool test __attribute__((unused)) = true;
68  std::filebuf 				f_tmp;
69
70  fb_01.open(name_01, std::ios_base::in);
71  fb_02.open(name_02, std::ios_base::out | std::ios_base::trunc);
72  fb_03.open(name_03, std::ios_base::out | std::ios_base::in | std::ios_base::trunc);
73
74  // NB Have to close these suckers. . .
75  // filebuf_type* close()
76  fb_01.close();
77  fb_02.close();
78  fb_03.close();
79  VERIFY( !fb_01.is_open() );
80  VERIFY( !fb_02.is_open() );
81  VERIFY( !fb_03.is_open() );
82}
83
84int main()
85{
86  test03();
87  test05();
88  return 0;
89}
90