1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001-2013 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 "" }
25 #include <testsuite_hooks.h>
26 #include <testsuite_io.h>
28 // @require@ %-*.tst %-*.txt
29 // @diff@ %-*.tst %*.txt
31 const char name_01[] = "seekoff.txt";
36 using namespace __gnu_test;
38 typedef filebuf::int_type int_type;
39 typedef filebuf::pos_type pos_type;
40 typedef filebuf::off_type off_type;
41 typedef filebuf::traits_type traits_type;
43 bool test __attribute__((unused)) = true;
50 pos_type pt_1(off_type(-1));
51 pos_type pt_2(off_type(0));
56 // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
57 // alters the stream position to off
61 constraint_filebuf fb;
62 fb.open(name_01, ios_base::in);
63 VERIFY( !fb.write_position() );
66 strmsz_1 = fb.in_avail();
67 pt_1 = fb.pubseekoff(2, ios_base::beg);
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.write_position() );