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748086b7 | 1 | // Copyright (C) 2003, 2009 Free Software Foundation, Inc. |
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2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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7 | // any later version. |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
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17 | |
18 | // 27.8.1.4 Overridden virtual functions | |
19 | ||
20 | #include <locale> | |
21 | #include <fstream> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | class Cvt : public std::codecvt<wchar_t, char, std::mbstate_t> | |
25 | { | |
26 | public: | |
27 | mutable bool unshift_called; | |
28 | ||
29 | Cvt() | |
30 | : unshift_called(false) | |
31 | { } | |
32 | ||
33 | protected: | |
34 | bool | |
35 | do_always_noconv() const throw() | |
36 | { return false; } | |
37 | ||
38 | int | |
39 | do_encoding() const throw() | |
40 | { return -1; } | |
41 | ||
42 | std::codecvt_base::result | |
43 | do_unshift(std::mbstate_t&, char* to, char*, char*& to_next) const | |
44 | { | |
45 | unshift_called = true; | |
46 | to_next = to; | |
47 | return std::codecvt_base::ok; | |
48 | } | |
49 | }; | |
50 | ||
51 | // libstdc++/12790 | |
52 | // basic_filebuf::seekoff() should call codecvt::unshift() | |
53 | void test01() | |
54 | { | |
55 | using namespace std; | |
56 | ||
57 | bool test __attribute__((unused)) = true; | |
58 | const char* name = "tmp_seekoff_12790"; | |
59 | ||
60 | Cvt* cvt = new Cvt; | |
61 | locale loc(locale::classic(), cvt); | |
62 | ||
63 | wfilebuf fb; | |
64 | fb.pubimbue(loc); | |
65 | ||
66 | fb.open(name, ios_base::out); | |
67 | fb.sputc(L'a'); | |
68 | ||
69 | VERIFY( !cvt->unshift_called ); | |
70 | fb.pubseekoff(0, ios_base::cur); | |
71 | VERIFY( cvt->unshift_called ); | |
72 | } | |
73 | ||
74 | int main() | |
75 | { | |
76 | test01(); | |
77 | return 0; | |
78 | } |