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1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
a5544970 | 3 | // Copyright (C) 2001-2019 Free Software Foundation, Inc. |
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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) |
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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 | |
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17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
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19 | |
20 | // 27.8.1.4 Overridden virtual functions | |
21 | ||
22 | #include <fstream> | |
23 | #include <testsuite_hooks.h> | |
24 | #include <testsuite_io.h> | |
25 | ||
26 | // @require@ %-*.tst %-*.txt | |
27 | // @diff@ %-*.tst %*.txt | |
28 | ||
29 | const char name_01[] = "tmp_sungetc_2out.tst"; // empty file, need to create | |
30 | ||
31 | // Test overloaded virtual functions. | |
32 | void test01() | |
33 | { | |
34 | using namespace std; | |
aecf642c | 35 | using namespace __gnu_test; |
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36 | typedef std::filebuf::int_type int_type; |
37 | typedef filebuf::traits_type traits_type; | |
38 | ||
11f10e6b | 39 | int_type c1, c2; |
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40 | |
41 | // int_type sungetc() | |
42 | // if in_cur not avail, return pbackfail(), else decrement and | |
43 | // return to_int_type(*gptr()) | |
44 | ||
45 | // out | |
46 | { | |
47 | constraint_filebuf fb_01; // out | |
48 | fb_01.pubsetbuf(0, 0); | |
49 | fb_01.open(name_01, ios::out | ios::trunc); | |
50 | VERIFY( fb_01.unbuffered() ); | |
51 | VERIFY( !fb_01.read_position() ); | |
52 | c1 = fb_01.sgetc(); | |
53 | VERIFY( c1 == traits_type::eof() ); | |
54 | c2 = fb_01.sungetc(); | |
55 | VERIFY( c2 == traits_type::eof() ); | |
56 | fb_01.sbumpc(); | |
57 | c1 = fb_01.sbumpc(); | |
58 | c2 = fb_01.sungetc(); | |
59 | VERIFY( c1 == c2 ); | |
60 | VERIFY( fb_01.unbuffered() ); | |
61 | VERIFY( !fb_01.read_position() ); | |
62 | } | |
63 | } | |
64 | ||
11f10e6b | 65 | int main() |
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66 | { |
67 | test01(); | |
68 | return 0; | |
69 | } |