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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/3-io.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, 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-1.tst";
35 using namespace __gnu_cxx_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_03
;
61 fb_03
.open(name_01
, ios_base::out
| ios_base::in
);
62 VERIFY( !fb_03
.write_position() );
63 VERIFY( !fb_03
.read_position() );
64 // 27filebuf-3.txt = bd23456789:;<=>?...
66 strmsz_1
= fb_03
.in_avail();
67 pt_1
= fb_03
.pubseekoff(2, ios_base::beg
);
68 strmsz_2
= fb_03
.in_avail();
71 c1
= fb_03
.snextc(); //current in pointer +1
73 fb_03
.pubseekoff(3, ios_base::beg
);
74 c2
= fb_03
.sputc('\n'); //current in pointer +1
75 fb_03
.pubseekoff(4, ios_base::beg
);
83 // 27filebuf-3.txt = bd2\n456789:;<=>?...
84 pt_2
= fb_03
.pubseekoff(2, ios_base::cur
);
86 VERIFY( (off_2
== (off_1
+ 2 + 1 + 1)) );
87 c1
= fb_03
.snextc(); //current in pointer +1
89 fb_03
.pubseekoff(0, ios_base::cur
);
90 c2
= fb_03
.sputc('x'); //test current out pointer
91 c3
= fb_03
.sputc('\n');
92 fb_03
.pubseekoff(0, ios_base::cur
);
98 // 27filebuf-3.txt = "bd2\n456x\n9"
99 pt_2
= fb_03
.pubseekoff(0, ios_base::end
);
101 VERIFY( off_1
> off_2
); //weak, but don't know exactly where it ends
102 c3
= fb_03
.sputc('\n');
103 strmsz_1
= fb_03
.sputn("because because because. . .", 28);
104 VERIFY( strmsz_1
== 28 );
105 fb_03
.pubseekoff(-1, ios_base::end
);
107 c1
= fb_03
.sungetc();
108 // Defect? retval of sungetc is not necessarily the character ungotten.
114 VERIFY( !fb_03
.write_position() );
115 VERIFY( fb_03
.read_position() );