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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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-2io.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;
42 streamsize strmsz_1, strmsz_2;
43 streamoff strmof_1, strmof_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::out | 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();
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);
84 pt_2 = fb.pubseekoff(2, ios_base::cur);
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 fb.pubseekoff(0, ios_base::cur);
99 pt_2 = fb.pubseekoff(0, ios_base::end);
101 VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends
103 strmsz_1 = fb.sputn("because because because. . .", 28);
104 VERIFY( strmsz_1 == 28 );
105 fb.pubseekoff(-1, ios_base::end);
108 // Defect? retval of sungetc is not necessarily the character ungotten.
114 VERIFY( fb.unbuffered() );