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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/1-io.cc
1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001, 2002, 2003, 2009 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 "" }
23 // { dg-require-binary-io "" }
26 #include <testsuite_hooks.h>
27 #include <testsuite_io.h>
29 // @require@ %-*.tst %-*.txt
30 // @diff@ %-*.tst %*.txt
32 const char name_01
[] = "seekoff-1io.tst";
37 using namespace __gnu_test
;
39 typedef filebuf::int_type int_type
;
40 typedef filebuf::pos_type pos_type
;
41 typedef filebuf::off_type off_type
;
43 bool test
__attribute__((unused
)) = true;
44 streamsize strmsz_1
, strmsz_2
;
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::out
| ios_base::in
);
63 VERIFY( !fb
.write_position() );
64 VERIFY( !fb
.read_position() );
67 strmsz_1
= fb
.in_avail();
68 pt_1
= fb
.pubseekoff(2, ios_base::beg
);
69 strmsz_2
= fb
.in_avail();
70 off_1
= off_type(pt_1
);
72 c1
= fb
.snextc(); //current in pointer +1
74 fb
.pubseekoff(3, ios_base::beg
);
75 c2
= fb
.sputc('\n'); //current in pointer +1
76 fb
.pubseekoff(4, ios_base::beg
);
85 pt_2
= fb
.pubseekoff(2, ios_base::cur
);
86 off_2
= off_type(pt_2
);
87 VERIFY( (off_2
== (off_1
+ 2 + 1 + 1)) );
88 c1
= fb
.snextc(); //current in pointer +1
90 fb
.pubseekoff(0, ios_base::cur
);
91 c2
= fb
.sputc('x'); //test current out pointer
93 fb
.pubseekoff(0, ios_base::cur
);
100 pt_2
= fb
.pubseekoff(0, ios_base::end
);
101 off_1
= off_type(pt_2
);
102 VERIFY( off_1
> off_2
); //weak, but don't know exactly where it ends
104 strmsz_1
= fb
.sputn("because because because. . .", 28);
105 VERIFY( strmsz_1
== 28 );
106 fb
.pubseekoff(-1, ios_base::end
);
109 // Defect? retval of sungetc is not necessarily the character ungotten.
115 VERIFY( !fb
.write_position() );
116 VERIFY( fb
.read_position() );