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a945c346 | 1 | // Copyright (C) 2013-2024 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 | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
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 | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
18 | // inserters | |
19 | ||
20 | // NB: This file is predicated on sstreams, ostreams | |
21 | // working, not to mention other major details like char_traits, and | |
22 | // all of the string_view class. | |
23 | ||
52066eae | 24 | // { dg-do run { target c++14 } } |
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25 | // { dg-require-fileio "" } |
26 | ||
27 | #include <experimental/string_view> | |
28 | #include <string> | |
29 | #include <fstream> | |
30 | #include <iostream> | |
31 | #include <testsuite_hooks.h> | |
32 | ||
33 | // testing basic_filebuf::xsputn via stress testing with large string_views | |
34 | // based on a bug report libstdc++ 9 | |
35 | // mode == out | |
36 | void | |
37 | test05(std::size_t size) | |
38 | { | |
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39 | const char filename[] = "inserters_extractors-2.txt"; |
40 | const char fillc = 'f'; | |
41 | std::ofstream ofs(filename); | |
42 | std::string str(size, fillc); | |
43 | std::experimental::string_view strv{str}; | |
44 | ||
45 | // sanity checks | |
46 | VERIFY( str.size() == size ); | |
47 | VERIFY( ofs.good() ); | |
48 | ||
49 | // stress test | |
50 | ofs << str << std::endl; | |
51 | if (!ofs.good()) | |
1558d39e | 52 | VERIFY( false ); |
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53 | |
54 | ofs << str << std::endl; | |
55 | if (!ofs.good()) | |
1558d39e | 56 | VERIFY( false ); |
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57 | |
58 | VERIFY( str.size() == size ); | |
59 | VERIFY( ofs.good() ); | |
60 | ||
61 | ofs.close(); | |
62 | ||
63 | // sanity check on the written file | |
64 | std::ifstream ifs(filename); | |
65 | std::size_t count = 0; | |
66 | char c; | |
67 | while (count <= (2 * size) + 4) | |
68 | { | |
69 | ifs >> c; | |
70 | if (ifs.good() && c == fillc) | |
71 | { | |
72 | ++count; | |
73 | c = '0'; | |
74 | } | |
75 | else | |
76 | break; | |
77 | } | |
78 | ||
79 | VERIFY( count == 2 * size ); | |
80 | } | |
81 | ||
82 | int | |
83 | main() | |
84 | { | |
85 | test05(1); | |
86 | test05(1000); | |
87 | test05(10000); | |
88 | ||
89 | return 0; | |
90 | } |