3 // Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation
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 // 27.6.1.3 unformatted input functions
22 // NB: ostream has a particular "seeks" category. Adopt this for istreams too.
23 // @require@ %-*.tst %-*.txt
24 // @diff@ %-*.tst %-*.txt
29 #include <testsuite_hooks.h>
34 typedef std::istream::off_type off_type
;
36 bool test
__attribute__((unused
)) = true;
37 std::istream::pos_type pos01
, pos02
, pos03
, pos04
, pos05
, pos06
;
38 std::ios_base::iostate state01
, state02
;
39 const char str_lit01
[] = "istream_seeks-1.txt";
40 const char str_lit02
[] = "istream_seeks-2.txt";
41 std::ifstream
if01(str_lit01
, std::ios_base::in
| std::ios_base::out
);
42 std::ifstream
if02(str_lit01
, std::ios_base::in
);
43 std::ifstream
if03(str_lit02
, std::ios_base::out
| std::ios_base::trunc
);
44 VERIFY( if01
.good() );
45 VERIFY( if02
.good() );
46 VERIFY( if03
.good() );
48 std::istream
is01(if01
.rdbuf());
49 std::istream
is02(if02
.rdbuf());
50 std::istream
is03(if03
.rdbuf());
59 // istream& seekg(pos_type)
60 // istream& seekg(off_type, ios_base::seekdir)
63 // NB: see library issues list 136. It's the v-3 interp that seekg
64 // only sets the input buffer, or else istreams with buffers that
65 // have _M_mode == ios_base::out will fail to have consistency
66 // between seekg and tellg.
67 state01
= is01
.rdstate();
68 is01
.seekg(10, std::ios_base::cur
);
69 state02
= is01
.rdstate();
71 VERIFY( pos01
== pos02
+ off_type(10) );
72 VERIFY( state01
== state02
);
74 VERIFY( pos02
== pos01
);
76 state01
= is02
.rdstate();
77 is02
.seekg(10, std::ios_base::cur
);
78 state02
= is02
.rdstate();
80 VERIFY( pos03
== pos04
+ off_type(10) );
81 VERIFY( state01
== state02
);
83 VERIFY( pos03
== pos04
);
85 state01
= is03
.rdstate();
86 is03
.seekg(10, std::ios_base::cur
);
87 state02
= is03
.rdstate();
89 VERIFY( pos05
== pos06
+ off_type(10) );
90 VERIFY( state01
== state02
);
92 VERIFY( pos05
== pos06
);
95 state01
= is01
.rdstate();
96 is01
.seekg(20, std::ios_base::beg
);
97 state02
= is01
.rdstate();
99 VERIFY( pos01
== pos02
+ off_type(10) );
100 VERIFY( state01
== state02
);
101 pos02
= is01
.tellg();
102 VERIFY( pos02
== pos01
);
104 state01
= is02
.rdstate();
105 is02
.seekg(20, std::ios_base::beg
);
106 state02
= is02
.rdstate();
107 pos03
= is02
.tellg();
108 VERIFY( pos03
== pos04
+ off_type(10) );
109 VERIFY( state01
== state02
);
110 pos04
= is02
.tellg();
111 VERIFY( pos03
== pos04
);
113 state01
= is03
.rdstate();
114 is03
.seekg(20, std::ios_base::beg
);
115 state02
= is03
.rdstate();
116 pos05
= is03
.tellg();
117 VERIFY( pos05
== pos06
+ off_type(10) );
118 VERIFY( state01
== state02
);
119 pos06
= is03
.tellg();
120 VERIFY( pos05
== pos06
);