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fdc11678 SM |
1 | // { dg-options "-std=gnu++17" } |
2 | ||
42a4f53d | 3 | // Copyright (C) 2013-2019 Free Software Foundation, Inc. |
fdc11678 SM |
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 | // inserters | |
21 | ||
22 | // NB: This file is predicated on sstreams, istreams, and ostreams | |
23 | // working, not to mention other major details like char_traits, and | |
24 | // all of the string_view class. | |
25 | ||
26 | #include <string_view> | |
27 | #include <string> | |
28 | #include <fstream> | |
29 | #include <iostream> | |
30 | #include <testsuite_hooks.h> | |
31 | ||
32 | // testing basic_filebuf::xsputn via stress testing with large string_views | |
33 | // based on a bug report libstdc++ 9 | |
34 | // mode == out | |
35 | void | |
36 | test05(std::size_t size) | |
37 | { | |
38 | bool test = true; | |
39 | ||
40 | const char filename[] = "inserters_extractors-2.txt"; | |
41 | const wchar_t fillc = L'f'; | |
42 | std::wofstream ofs(filename); | |
43 | std::wstring str(size, fillc); | |
44 | std::wstring_view strv(str); | |
45 | ||
46 | // sanity checks | |
47 | VERIFY( str.size() == size ); | |
48 | VERIFY( ofs.good() ); | |
49 | ||
50 | // stress test | |
51 | ofs << str << std::endl; | |
52 | if (!ofs.good()) | |
53 | test = false; | |
54 | ||
55 | ofs << str << std::endl; | |
56 | if (!ofs.good()) | |
57 | test = false; | |
58 | ||
59 | VERIFY( str.size() == size ); | |
60 | VERIFY( ofs.good() ); | |
61 | ||
62 | ofs.close(); | |
63 | ||
64 | // sanity check on the written file | |
65 | std::wifstream ifs(filename); | |
66 | std::size_t count = 0; | |
67 | wchar_t c; | |
68 | while (count <= (2 * size) + 4) | |
69 | { | |
70 | ifs >> c; | |
71 | if (ifs.good() && c == fillc) | |
72 | { | |
73 | ++count; | |
74 | c = '0'; | |
75 | } | |
76 | else | |
77 | break; | |
78 | } | |
79 | ||
80 | VERIFY( count == 2 * size ); | |
81 | } | |
82 | ||
83 | int | |
84 | main() | |
85 | { | |
86 | test05(1); | |
87 | test05(1000); | |
88 | test05(10000); | |
89 | ||
90 | return 0; | |
91 | } |