1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001-2024 Free Software Foundation, Inc.
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)
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.
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/>.
20 // 27.8.1.4 Overridden virtual functions
22 // { dg-require-fileio "" }
23 // { dg-require-binary-io "" }
24 // { dg-additional-files "seekoff-1io.tst" }
27 #include <testsuite_hooks.h>
28 #include <testsuite_io.h>
30 const char name_01
[] = "seekoff-1io.tst";
35 using namespace __gnu_test
;
37 typedef filebuf::int_type int_type
;
38 typedef filebuf::pos_type pos_type
;
39 typedef filebuf::off_type off_type
;
47 pos_type
pt_1(off_type(-1));
48 pos_type
pt_2(off_type(0));
53 // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
54 // alters the stream position to off
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() );
64 strmsz_1
= fb
.in_avail();
65 pt_1
= fb
.pubseekoff(2, ios_base::beg
);
67 off_1
= off_type(pt_1
);
69 c1
= fb
.snextc(); //current in pointer +1
71 fb
.pubseekoff(3, ios_base::beg
);
72 c2
= fb
.sputc('\n'); //current in pointer +1
73 fb
.pubseekoff(4, ios_base::beg
);
82 pt_2
= fb
.pubseekoff(2, ios_base::cur
);
83 off_2
= off_type(pt_2
);
84 VERIFY( (off_2
== (off_1
+ 2 + 1 + 1)) );
85 c1
= fb
.snextc(); //current in pointer +1
87 fb
.pubseekoff(0, ios_base::cur
);
88 c2
= fb
.sputc('x'); //test current out pointer
90 fb
.pubseekoff(0, ios_base::cur
);
97 pt_2
= fb
.pubseekoff(0, ios_base::end
);
98 off_1
= off_type(pt_2
);
99 VERIFY( off_1
> off_2
); //weak, but don't know exactly where it ends
101 strmsz_1
= fb
.sputn("because because because. . .", 28);
102 VERIFY( strmsz_1
== 28 );
103 fb
.pubseekoff(-1, ios_base::end
);
106 // Defect? retval of sungetc is not necessarily the character ungotten.
112 VERIFY( !fb
.write_position() );
113 VERIFY( fb
.read_position() );