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88b9d363 | 2 | // Copyright (C) 2013-2022 Free Software Foundation, Inc. |
fdc11678 SM |
3 | // |
4 | // This file is part of the GNU ISO C++ Library. This library is free | |
5 | // software; you can redistribute it and/or modify it under the | |
6 | // terms of the GNU General Public License as published by the | |
7 | // Free Software Foundation; either version 3, or (at your option) | |
8 | // any later version. | |
9 | ||
10 | // This library is distributed in the hope that it will be useful, | |
11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | // GNU General Public License for more details. | |
14 | ||
15 | // You should have received a copy of the GNU General Public License along | |
16 | // with this library; see the file COPYING3. If not see | |
17 | // <http://www.gnu.org/licenses/>. | |
18 | ||
19 | // inserters | |
20 | ||
21 | // NB: This file is predicated on sstreams, ostreams | |
22 | // working, not to mention other major details like char_traits, and | |
23 | // all of the string_view class. | |
24 | ||
25 | // { dg-options "-std=gnu++17" } | |
26 | // { dg-require-fileio "" } | |
27 | ||
c9638d26 | 28 | namespace inserters_2 { |
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29 | |
30 | // testing basic_filebuf::xsputn via stress testing with large string_views | |
31 | // based on a bug report libstdc++ 9 | |
32 | // mode == out | |
dd694d77 SM |
33 | static void |
34 | test05 (std::size_t size) | |
fdc11678 | 35 | { |
c9638d26 | 36 | bool test ATTRIBUTE_UNUSED = true; |
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37 | |
38 | const char filename[] = "inserters_extractors-2.txt"; | |
39 | const char fillc = 'f'; | |
40 | std::ofstream ofs(filename); | |
41 | std::string str(size, fillc); | |
c9638d26 | 42 | gdb::string_view strv{str}; |
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43 | |
44 | // sanity checks | |
45 | VERIFY( str.size() == size ); | |
46 | VERIFY( ofs.good() ); | |
47 | ||
48 | // stress test | |
49 | ofs << str << std::endl; | |
50 | if (!ofs.good()) | |
51 | test = false; | |
52 | ||
53 | ofs << str << std::endl; | |
54 | if (!ofs.good()) | |
55 | test = false; | |
56 | ||
57 | VERIFY( str.size() == size ); | |
58 | VERIFY( ofs.good() ); | |
59 | ||
60 | ofs.close(); | |
61 | ||
62 | // sanity check on the written file | |
63 | std::ifstream ifs(filename); | |
64 | std::size_t count = 0; | |
65 | char c; | |
66 | while (count <= (2 * size) + 4) | |
67 | { | |
68 | ifs >> c; | |
69 | if (ifs.good() && c == fillc) | |
70 | { | |
71 | ++count; | |
72 | c = '0'; | |
73 | } | |
74 | else | |
75 | break; | |
76 | } | |
77 | ||
78 | VERIFY( count == 2 * size ); | |
79 | } | |
80 | ||
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81 | static int |
82 | main () | |
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83 | { |
84 | test05(1); | |
85 | test05(1000); | |
86 | test05(10000); | |
87 | ||
88 | return 0; | |
89 | } | |
c9638d26 SM |
90 | |
91 | } // namespace inserters_2 |