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1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
a5544970 | 3 | // Copyright (C) 2001-2019 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/>. | |
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19 | |
20 | // 27.8.1.4 Overridden virtual functions | |
21 | ||
0c20e4ec NS |
22 | // { dg-require-fileio "" } |
23 | ||
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24 | #include <fstream> |
25 | #include <testsuite_hooks.h> | |
26 | #include <testsuite_io.h> | |
27 | ||
28 | // @require@ %-*.tst %-*.txt | |
29 | // @diff@ %-*.tst %*.txt | |
30 | ||
7d6a0993 | 31 | const char name_01[] = "seekpos-1io.tst"; // file with data in it |
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32 | |
33 | void test05() | |
34 | { | |
35 | using namespace std; | |
aecf642c | 36 | using namespace __gnu_test; |
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37 | |
38 | typedef filebuf::int_type int_type; | |
39 | typedef filebuf::pos_type pos_type; | |
40 | typedef filebuf::off_type off_type; | |
41 | ||
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42 | int_type c1; |
43 | int_type c2; | |
44 | int_type c3; | |
45 | ||
46 | pos_type pt_1(off_type(-1)); | |
47 | pos_type pt_2(off_type(0)); | |
48 | pos_type pt_3; | |
49 | off_type off_1 = 0; | |
50 | off_type off_2 = 0; | |
51 | ||
52 | // seekpos | |
53 | // pubseekpos(pos_type sp, ios_base::openmode) | |
54 | // alters the stream position to sp | |
55 | ||
56 | // in | out | |
57 | { | |
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58 | constraint_filebuf fb; |
59 | fb.open(name_01, ios_base::out | ios_base::in); | |
60 | VERIFY( !fb.write_position() ); | |
61 | VERIFY( !fb.read_position() ); | |
62 | ||
63 | // beg | |
64 | pt_1 = fb.pubseekoff(78, ios_base::beg); | |
4c4809c1 | 65 | off_1 = off_type(pt_1); |
ed242935 | 66 | VERIFY( off_1 > 0 ); |
7d6a0993 | 67 | c1 = fb.snextc(); //current in pointer +1 |
ed242935 | 68 | VERIFY( c1 == 't' ); |
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69 | |
70 | // cur | |
71 | pt_3 = fb.pubseekoff(0, ios_base::cur); | |
72 | fb.pubseekpos(pt_3); | |
73 | c2 = fb.sputc('\n'); //test current out pointer | |
74 | pt_3 = fb.pubseekoff(0, ios_base::cur); | |
75 | fb.pubseekpos(pt_3); | |
76 | c3 = fb.sgetc(); | |
77 | fb.pubsync(); //resets pointers | |
78 | pt_2 = fb.pubseekpos(pt_1); | |
4c4809c1 | 79 | off_2 = off_type(pt_2); |
ed242935 | 80 | VERIFY( off_1 == off_2 ); |
7d6a0993 | 81 | c3 = fb.snextc(); //current in pointer +1 |
ed242935 | 82 | VERIFY( c2 == c3 ); |
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83 | |
84 | // end | |
85 | pt_1 = fb.pubseekoff(0, ios_base::end); | |
4c4809c1 | 86 | off_1 = off_type(pt_1); |
ed242935 | 87 | VERIFY( off_1 > off_2 ); |
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88 | fb.sputn("\nof the wonderful things he does!!\nok", 37); |
89 | fb.pubsync(); | |
5e93f39f | 90 | VERIFY( fb.write_position() ); |
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91 | VERIFY( !fb.read_position() ); |
92 | fb.close(); | |
93 | VERIFY( !fb.is_open() ); | |
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94 | } |
95 | } | |
96 | ||
11f10e6b | 97 | int main() |
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98 | { |
99 | test05(); | |
100 | return 0; | |
101 | } |