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1 | // 2000-06-29 bkoz |
2 | ||
a945c346 | 3 | // Copyright (C) 2000-2024 Free Software Foundation, Inc. |
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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 | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
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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 | |
748086b7 JJ |
17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
23cac885 | 19 | |
9c9e97bd | 20 | // 27.6.2.4 basic_ostream seek members [lib.ostream.seeks] |
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21 | // @require@ %-*.tst %-*.txt |
22 | // @diff@ %-*.tst %-*.txt | |
23 | ||
0c20e4ec NS |
24 | // { dg-require-fileio "" } |
25 | ||
9c9e97bd | 26 | #include <ostream> |
23cac885 | 27 | #include <istream> |
23cac885 | 28 | #include <fstream> |
debac9f4 | 29 | #include <cstdlib> |
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30 | #include <testsuite_hooks.h> |
31 | ||
32 | const char* s = " lootpack, peanut butter wolf, rob swift, madlib, quasimoto"; | |
33 | const int times = 10; | |
34 | ||
35 | void write_rewind(std::iostream& stream) | |
36 | { | |
37 | for (int j = 0; j < times; j++) | |
38 | { | |
9c9e97bd | 39 | std::streampos begin = stream.tellp(); |
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40 | |
41 | for (int i = 0; i < times; ++i) | |
42 | stream << j << '-' << i << s << '\n'; | |
43 | ||
9c9e97bd | 44 | stream.seekp(begin); |
23cac885 | 45 | } |
9c9e97bd | 46 | VERIFY( stream.good() ); |
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47 | } |
48 | ||
49 | void check_contents(std::iostream& stream) | |
50 | { | |
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51 | stream.clear(); |
52 | stream.seekg(0, std::ios::beg); | |
53 | int i = 0; | |
54 | int loop = times * times + 2; | |
55 | while (i < loop) | |
56 | { | |
57 | stream.ignore(80, '\n'); | |
58 | if (stream.good()) | |
59 | ++i; | |
60 | else | |
61 | break; | |
62 | } | |
63 | VERIFY( i == times ); | |
64 | } | |
65 | ||
66 | // fstream | |
67 | // libstdc++/2346 | |
68 | void test02() | |
69 | { | |
70 | std::fstream ofstrm; | |
71 | ofstrm.open("istream_seeks-3.txt", std::ios::out); | |
72 | if (!ofstrm) | |
73 | std::abort(); | |
74 | write_rewind(ofstrm); | |
75 | ofstrm.close(); | |
76 | ||
77 | std::fstream ifstrm; | |
78 | ifstrm.open("istream_seeks-3.txt", std::ios::in); | |
79 | check_contents(ifstrm); | |
80 | ifstrm.close(); | |
81 | } | |
82 | ||
83 | int main() | |
84 | { | |
85 | test02(); | |
86 | return 0; | |
87 | } |