1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // 27.8.1.4 Overridden virtual functions
24 #include <testsuite_hooks.h>
25 #include <testsuite_io.h>
27 // @require@ %-*.tst %-*.txt
28 // @diff@ %-*.tst %*.txt
30 const char name_01
[] = "seekoff.txt";
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
;
40 typedef filebuf::traits_type traits_type
;
42 bool test
__attribute__((unused
)) = true;
43 streamsize strmsz_1
, strmsz_2
;
49 pos_type
pt_1(off_type(-1));
50 pos_type
pt_2(off_type(0));
55 // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
56 // alters the stream position to off
60 constraint_filebuf fb
;
62 fb
.open(name_01
, ios_base::in
);
63 VERIFY( fb
.unbuffered() );
66 strmsz_1
= fb
.in_avail();
67 pt_1
= fb
.pubseekoff(2, ios_base::beg
);
68 strmsz_2
= fb
.in_avail();
69 off_1
= off_type(pt_1
);
71 c1
= fb
.snextc(); //current in pointer +1
73 fb
.pubseekoff(3, ios_base::beg
);
74 c2
= fb
.sputc('\n'); //current in pointer +1
75 fb
.pubseekoff(4, ios_base::beg
);
77 VERIFY( c2
== traits_type::eof() );
84 pt_2
= fb
.pubseekoff(2, ios_base::cur
);
85 off_2
= off_type(pt_2
);
86 VERIFY( (off_2
== (off_1
+ 2 + 1 + 1)) );
87 c1
= fb
.snextc(); //current in pointer +1
89 fb
.pubseekoff(0, ios_base::cur
);
90 c2
= fb
.sputc('x'); //test current out pointer
92 VERIFY( c2
== traits_type::eof() );
93 VERIFY( c3
== traits_type::eof() );
94 fb
.pubseekoff(0, ios_base::cur
);
101 pt_2
= fb
.pubseekoff(0, ios_base::end
);
102 off_1
= off_type(pt_2
);
103 VERIFY( off_1
> off_2
); //weak, but don't know exactly where it ends
105 strmsz_1
= fb
.sputn("because because because. . .", 28);
106 VERIFY( strmsz_1
== 0 );
107 fb
.pubseekoff(-1, ios_base::end
);
110 // Defect? retval of sungetc is not necessarily the character ungotten.
116 VERIFY( fb
.unbuffered() );