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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/sstream.cc
1 // Copyright (C) 2004-2014 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // 27.6.1.3 unformatted input functions
19 // NB: ostream has a particular "seeks" category. Adopt this for istreams too.
20 // @require@ %-*.tst %-*.txt
21 // @diff@ %-*.tst %-*.txt
26 #include <testsuite_hooks.h>
31 typedef std::wistream::off_type off_type
;
33 bool test
__attribute__((unused
)) = true;
34 std::wistream::pos_type pos01
, pos02
, pos03
, pos04
, pos05
, pos06
;
35 std::ios_base::iostate state01
, state02
;
36 const char str_lit01
[] = "wistream_seeks-1.tst";
37 std::wifstream
if01(str_lit01
);
38 std::wifstream
if02(str_lit01
);
39 std::wifstream
if03(str_lit01
);
40 VERIFY( if01
.good() );
41 VERIFY( if02
.good() );
42 VERIFY( if03
.good() );
44 std::wstringbuf
strbuf01(std::ios_base::in
| std::ios_base::out
);
46 // initialize stringbufs that are ios_base::out
47 std::wstringbuf
strbuf03(strbuf01
.str(), std::ios_base::out
);
48 // initialize stringbufs that are ios_base::in
49 std::wstringbuf
strbuf02(strbuf01
.str(), std::ios_base::in
);
51 std::wistream
is01(&strbuf01
);
52 std::wistream
is02(&strbuf02
);
53 std::wistream
is03(&strbuf03
);
59 VERIFY( pos01
== pos02
);
64 VERIFY( pos03
== pos04
);
69 VERIFY( pos05
== pos06
);
72 // NB: see library issues list 136. It's the v-3 interp that seekg
73 // only sets the input buffer, or else istreams with buffers that
74 // have _M_mode == ios_base::out will fail to have consistency
75 // between seekg and tellg.
76 state01
= is01
.rdstate();
77 is01
.seekg(10, std::ios_base::cur
);
78 state02
= is01
.rdstate();
80 VERIFY( pos01
== pos02
+ off_type(10) );
81 VERIFY( state01
== state02
);
83 VERIFY( pos02
== pos01
);