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1 | // { dg-require-fileio "" } |
2 | ||
8d9254fc | 3 | // Copyright (C) 2010-2020 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 | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
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 | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | // 27.8.1.4 Overridden virtual functions | |
21 | ||
22 | #include <fstream> | |
23 | #include <cwchar> | |
237526dd | 24 | #include <cstring> |
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25 | #include <testsuite_hooks.h> |
26 | ||
27 | void test01() | |
28 | { | |
29 | using namespace std; | |
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30 | |
31 | typedef wfilebuf::pos_type pos_type; | |
32 | const char name[] = "tmp_seekoff-4.tst"; | |
33 | ||
3531cf5e | 34 | const size_t size = 12; |
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35 | wchar_t buf[size]; |
36 | streamsize n; | |
37 | ||
38 | wfilebuf fb; | |
39 | fb.open(name, ios_base::in | ios_base::out | ios_base::trunc); | |
40 | ||
41 | n = fb.sputn(L"abcd", 4); | |
42 | VERIFY( n == 4 ); | |
43 | ||
44 | fb.pubseekoff(0, ios_base::beg); | |
45 | n = fb.sgetn(buf, 3); | |
46 | VERIFY( n == 3 ); | |
47 | VERIFY( !wmemcmp(buf, L"abc", 3) ); | |
48 | ||
3531cf5e | 49 | // Check read => write without pubseekoff(0, ios_base::cur) |
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50 | |
51 | n = fb.sputn(L"ef", 2); | |
52 | VERIFY( n == 2 ); | |
53 | ||
54 | fb.pubseekoff(0, ios_base::beg); | |
55 | ||
56 | n = fb.sgetn(buf, size); | |
57 | VERIFY( n == 5 ); | |
58 | VERIFY( !wmemcmp(buf, L"abcef", 5) ); | |
59 | ||
60 | fb.pubseekoff(0, ios_base::beg); | |
3531cf5e DK |
61 | n = fb.sputn(L"gh", 2); |
62 | VERIFY( n == 2 ); | |
63 | ||
64 | // Check write => read without pubseekoff(0, ios_base::cur) | |
65 | ||
66 | n = fb.sgetn( buf, 3 ); | |
67 | VERIFY( !memcmp(buf, L"cef", 3) ); | |
68 | ||
69 | n = fb.sputn(L"ijkl", 4); | |
70 | VERIFY( n == 4 ); | |
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71 | |
72 | fb.pubseekoff(0, ios_base::beg); | |
73 | n = fb.sgetn(buf, 2); | |
74 | VERIFY( n == 2 ); | |
75 | VERIFY( !wmemcmp(buf, L"gh", 2) ); | |
76 | ||
77 | fb.pubseekoff(0, ios_base::end); | |
78 | n = fb.sputn(L"mno", 3); | |
79 | VERIFY( n == 3 ); | |
80 | ||
81 | fb.pubseekoff(0, ios_base::beg); | |
82 | n = fb.sgetn(buf, size); | |
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83 | VERIFY( n == 12 ); |
84 | VERIFY( !wmemcmp(buf, L"ghcefijklmno", 12) ); | |
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85 | |
86 | fb.close(); | |
87 | } | |
88 | ||
89 | int main() | |
90 | { | |
91 | test01(); | |
92 | return 0; | |
93 | } |