]>
Commit | Line | Data |
---|---|---|
f10eea7b PC |
1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
8d9254fc | 3 | // Copyright (C) 2001-2020 Free Software Foundation, Inc. |
f10eea7b PC |
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 | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
f10eea7b PC |
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 | |
748086b7 JJ |
17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
f10eea7b PC |
19 | |
20 | // 27.8.1.4 Overridden virtual functions | |
21 | ||
79711d26 SL |
22 | // { dg-require-fileio "" } |
23 | ||
f10eea7b PC |
24 | #include <fstream> |
25 | #include <testsuite_hooks.h> | |
26 | #include <testsuite_io.h> | |
27 | ||
28 | // @require@ %-*.tst %-*.txt | |
29 | // @diff@ %-*.tst %*.txt | |
30 | ||
31 | const char name_01[] = "tmp_sputbackc_2out.tst"; // empty file, need to create | |
32 | ||
33 | // Test overloaded virtual functions. | |
34 | void test01() | |
35 | { | |
36 | using namespace std; | |
aecf642c | 37 | using namespace __gnu_test; |
f10eea7b PC |
38 | typedef std::filebuf::int_type int_type; |
39 | typedef filebuf::traits_type traits_type; | |
40 | ||
11f10e6b | 41 | int_type c1, c2; |
f10eea7b PC |
42 | |
43 | // int_type sputbackc(char_type c) | |
44 | // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail | |
45 | // otherwise decrements in_cur and returns *gptr() | |
46 | ||
47 | // out | |
48 | { | |
49 | constraint_filebuf fb_01; // out | |
50 | fb_01.pubsetbuf(0, 0); | |
51 | fb_01.open(name_01, ios::out | ios::trunc); | |
52 | VERIFY( fb_01.unbuffered() ); | |
53 | VERIFY( !fb_01.read_position() ); | |
54 | c1 = fb_01.sgetc(); | |
55 | VERIFY( c1 == traits_type::eof() ); | |
56 | c2 = fb_01.sputbackc('a'); | |
57 | VERIFY( c2 == traits_type::eof() ); | |
58 | fb_01.sbumpc(); | |
59 | c1 = fb_01.sbumpc(); | |
60 | c2 = fb_01.sputbackc('a'); | |
61 | VERIFY( c1 == c2 ); | |
62 | VERIFY( fb_01.unbuffered() ); | |
63 | VERIFY( !fb_01.read_position() ); | |
64 | } | |
65 | } | |
66 | ||
11f10e6b | 67 | int main() |
f10eea7b PC |
68 | { |
69 | test01(); | |
70 | return 0; | |
71 | } |