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a5544970 | 1 | // Copyright (C) 2004-2019 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 | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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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 | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
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17 | |
18 | // 27.6.1.3 unformatted input functions | |
19 | ||
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20 | // { dg-require-fileio "" } |
21 | ||
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22 | #include <istream> |
23 | #include <string> | |
24 | #include <fstream> | |
25 | #include <limits> | |
debac9f4 | 26 | #include <cstdlib> |
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27 | #include <testsuite_hooks.h> |
28 | ||
29 | using namespace std; | |
30 | ||
31 | string prepare(string::size_type len, unsigned nchunks, char delim) | |
32 | { | |
33 | string ret; | |
34 | for (unsigned i = 0; i < nchunks; ++i) | |
35 | { | |
36 | for (string::size_type j = 0; j < len; ++j) | |
37 | ret.push_back('a' + rand() % 26); | |
38 | len *= 2; | |
39 | ret.push_back(delim); | |
40 | } | |
41 | return ret; | |
42 | } | |
43 | ||
44 | void check(istream& stream, const string& str, unsigned nchunks, char delim) | |
45 | { | |
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46 | string::size_type index = 0, index_new = 0; |
47 | unsigned n = 0; | |
48 | ||
49 | while (stream.ignore(numeric_limits<streamsize>::max(), delim).good()) | |
50 | { | |
51 | index_new = str.find(delim, index); | |
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52 | VERIFY( static_cast<string::size_type>(stream.gcount()) == |
53 | index_new - index + 1 ); | |
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54 | index = index_new + 1; |
55 | ++n; | |
56 | } | |
57 | VERIFY( stream.gcount() == 0 ); | |
58 | VERIFY( !stream.fail() ); | |
59 | VERIFY( n == nchunks ); | |
60 | } | |
61 | ||
62 | void test01() | |
63 | { | |
64 | const char filename[] = "istream_ignore.txt"; | |
65 | ||
66 | const char delim = '|'; | |
67 | const unsigned nchunks = 10; | |
68 | const string data = prepare(555, nchunks, delim); | |
69 | ||
70 | ofstream ofstrm; | |
71 | ofstrm.open(filename); | |
72 | ofstrm.write(data.data(), data.size()); | |
73 | ofstrm.close(); | |
74 | ||
75 | ifstream ifstrm; | |
76 | ifstrm.open(filename); | |
77 | check(ifstrm, data, nchunks, delim); | |
78 | ifstrm.close(); | |
79 | } | |
80 | ||
81 | int main() | |
82 | { | |
83 | test01(); | |
84 | return 0; | |
85 | } |