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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/char/1-out.cc
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
[] = "seekpos-1out.tst"; // file with data in it
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;
48 pos_type
pt_1(off_type(-1));
49 pos_type
pt_2(off_type(0));
55 // pubseekpos(pos_type sp, ios_base::openmode)
56 // alters the stream position to sp
60 constraint_filebuf fb
;
61 fb
.open(name_01
, ios_base::out
);
62 VERIFY( !fb
.write_position() );
63 VERIFY( !fb
.read_position() );
66 pt_1
= fb
.pubseekoff(78, ios_base::beg
);
67 off_1
= off_type(pt_1
);
69 c1
= fb
.snextc(); //current in pointer +1
70 VERIFY( c1
== traits_type::eof() );
73 pt_3
= fb
.pubseekoff(0, ios_base::cur
);
75 c2
= fb
.sputc('\n'); //test current out pointer
76 pt_3
= fb
.pubseekoff(0, ios_base::cur
);
79 fb
.pubsync(); //resets pointers
80 pt_2
= fb
.pubseekpos(pt_1
);
81 off_2
= off_type(pt_2
);
82 VERIFY( off_1
== off_2
);
83 c3
= fb
.snextc(); //current in pointer +1
85 VERIFY( c3
== traits_type::eof() );
88 pt_1
= fb
.pubseekoff(0, ios_base::end
);
89 off_1
= off_type(pt_1
);
90 VERIFY( off_1
> off_2
);
91 fb
.sputn("\nof the wonderful things he does!!\nok", 37);
93 VERIFY( fb
.write_position() );
94 VERIFY( !fb
.read_position() );
96 VERIFY( !fb
.is_open() );