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ed242935 PC |
1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
a945c346 | 3 | // Copyright (C) 2001-2024 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/>. | |
ed242935 | 19 | |
dfd07532 | 20 | // C++98 27.8.1.4 Overridden virtual functions |
ed242935 | 21 | |
0c20e4ec | 22 | // { dg-require-fileio "" } |
dfd07532 | 23 | // { dg-additional-files "seekoff.txt" } |
0c20e4ec | 24 | |
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25 | #include <fstream> |
26 | #include <testsuite_hooks.h> | |
27 | #include <testsuite_io.h> | |
28 | ||
7d6a0993 | 29 | const char name_01[] = "seekoff.txt"; |
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30 | |
31 | void test05() | |
32 | { | |
33 | using namespace std; | |
aecf642c | 34 | using namespace __gnu_test; |
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35 | |
36 | typedef filebuf::int_type int_type; | |
37 | typedef filebuf::pos_type pos_type; | |
38 | typedef filebuf::off_type off_type; | |
7d6a0993 | 39 | typedef filebuf::traits_type traits_type; |
ed242935 | 40 | |
567d4027 | 41 | streamsize strmsz_1; |
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42 | |
43 | int_type c1; | |
44 | int_type c2; | |
45 | int_type c3; | |
46 | ||
47 | pos_type pt_1(off_type(-1)); | |
48 | pos_type pt_2(off_type(0)); | |
49 | off_type off_1 = 0; | |
50 | off_type off_2 = 0; | |
51 | ||
52 | // seekoff | |
53 | // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which) | |
54 | // alters the stream position to off | |
55 | ||
7d6a0993 | 56 | // in |
ed242935 | 57 | { |
7d6a0993 BK |
58 | constraint_filebuf fb; |
59 | fb.pubsetbuf(0, 0); | |
60 | fb.open(name_01, ios_base::in); | |
61 | VERIFY( fb.unbuffered() ); | |
62 | ||
ed242935 | 63 | //beg |
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64 | strmsz_1 = fb.in_avail(); |
65 | pt_1 = fb.pubseekoff(2, ios_base::beg); | |
567d4027 | 66 | fb.in_avail(); |
4c4809c1 | 67 | off_1 = off_type(pt_1); |
ed242935 | 68 | VERIFY( off_1 > 0 ); |
7d6a0993 | 69 | c1 = fb.snextc(); //current in pointer +1 |
ed242935 | 70 | VERIFY( c1 == '9' ); |
7d6a0993 BK |
71 | fb.pubseekoff(3, ios_base::beg); |
72 | c2 = fb.sputc('\n'); //current in pointer +1 | |
73 | fb.pubseekoff(4, ios_base::beg); | |
74 | c3 = fb.sgetc(); | |
75 | VERIFY( c2 == traits_type::eof() ); | |
ed242935 | 76 | VERIFY( c3 == '9' ); |
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77 | fb.pubsync(); |
78 | c1 = fb.sgetc(); | |
ed242935 | 79 | VERIFY( c1 == c3 ); |
7d6a0993 | 80 | |
ed242935 | 81 | //cur |
7d6a0993 | 82 | pt_2 = fb.pubseekoff(2, ios_base::cur); |
4c4809c1 | 83 | off_2 = off_type(pt_2); |
ed242935 | 84 | VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) ); |
7d6a0993 | 85 | c1 = fb.snextc(); //current in pointer +1 |
ed242935 | 86 | VERIFY( c1 == '1' ); |
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87 | fb.pubseekoff(0, ios_base::cur); |
88 | c2 = fb.sputc('x'); //test current out pointer | |
89 | c3 = fb.sputc('\n'); | |
90 | VERIFY( c2 == traits_type::eof() ); | |
91 | VERIFY( c3 == traits_type::eof() ); | |
92 | fb.pubseekoff(0, ios_base::cur); | |
93 | c1 = fb.sgetc(); | |
94 | fb.pubsync(); | |
95 | c3 = fb.sgetc(); | |
ed242935 | 96 | VERIFY( c1 == c3 ); |
7d6a0993 | 97 | |
ed242935 | 98 | //end |
7d6a0993 | 99 | pt_2 = fb.pubseekoff(0, ios_base::end); |
4c4809c1 | 100 | off_1 = off_type(pt_2); |
ed242935 | 101 | VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends |
7d6a0993 BK |
102 | c3 = fb.sputc('\n'); |
103 | strmsz_1 = fb.sputn("because because because. . .", 28); | |
104 | VERIFY( strmsz_1 == 0 ); | |
105 | fb.pubseekoff(-1, ios_base::end); | |
106 | fb.sgetc(); | |
107 | c1 = fb.sungetc(); | |
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108 | // Defect? retval of sungetc is not necessarily the character ungotten. |
109 | // So re-get it. | |
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110 | c1 = fb.sgetc(); |
111 | fb.pubsync(); | |
112 | c3 = fb.sgetc(); | |
ed242935 | 113 | VERIFY( c1 == c3 ); |
7d6a0993 | 114 | VERIFY( fb.unbuffered() ); |
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115 | } |
116 | } | |
117 | ||
11f10e6b | 118 | int main() |
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119 | { |
120 | test05(); | |
121 | return 0; | |
122 | } |