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ca8f2cb1 | 1 | |
8d9254fc | 2 | // Copyright (C) 2013-2020 Free Software Foundation, Inc. |
ca8f2cb1 VV |
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" } | |
6458742a | 26 | // { dg-do run { target c++17 } } |
ca8f2cb1 VV |
27 | // { dg-require-fileio "" } |
28 | ||
29 | #include <string_view> | |
30 | #include <string> | |
31 | #include <fstream> | |
32 | #include <iostream> | |
33 | #include <testsuite_hooks.h> | |
34 | ||
35 | // testing basic_filebuf::xsputn via stress testing with large string_views | |
36 | // based on a bug report libstdc++ 9 | |
37 | // mode == out | |
38 | void | |
39 | test05(std::size_t size) | |
40 | { | |
118c8424 | 41 | bool test = true; |
ca8f2cb1 VV |
42 | |
43 | const char filename[] = "inserters_extractors-2.txt"; | |
44 | const char fillc = 'f'; | |
45 | std::ofstream ofs(filename); | |
46 | std::string str(size, fillc); | |
47 | std::string_view strv{str}; | |
48 | ||
49 | // sanity checks | |
50 | VERIFY( str.size() == size ); | |
51 | VERIFY( ofs.good() ); | |
52 | ||
53 | // stress test | |
54 | ofs << str << std::endl; | |
55 | if (!ofs.good()) | |
56 | test = false; | |
57 | ||
58 | ofs << str << std::endl; | |
59 | if (!ofs.good()) | |
60 | test = false; | |
61 | ||
62 | VERIFY( str.size() == size ); | |
63 | VERIFY( ofs.good() ); | |
64 | ||
65 | ofs.close(); | |
66 | ||
67 | // sanity check on the written file | |
68 | std::ifstream ifs(filename); | |
69 | std::size_t count = 0; | |
70 | char c; | |
71 | while (count <= (2 * size) + 4) | |
72 | { | |
73 | ifs >> c; | |
74 | if (ifs.good() && c == fillc) | |
75 | { | |
76 | ++count; | |
77 | c = '0'; | |
78 | } | |
79 | else | |
80 | break; | |
81 | } | |
82 | ||
83 | VERIFY( count == 2 * size ); | |
84 | } | |
85 | ||
86 | int | |
87 | main() | |
88 | { | |
89 | test05(1); | |
90 | test05(1000); | |
91 | test05(10000); | |
92 | ||
93 | return 0; | |
94 | } |