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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/1-out.cc
1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001-2019 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
23 #include <testsuite_hooks.h>
24 #include <testsuite_io.h>
26 // @require@ %-*.tst %-*.txt
27 // @diff@ %-*.tst %*.txt
29 const char name_02
[] = "tmp_sgetn_1out.tst"; // empty file, need to create
31 // Test overloaded virtual functions.
35 using namespace __gnu_test
;
36 typedef filebuf::int_type int_type
;
37 typedef filebuf::traits_type traits_type
;
39 streamsize strmsz_1
, strmsz_2
;
40 char carray2
[8192] = "";
43 // streamsize sgetn(char_type *s, streamsize n)
44 // streamsize xsgetn(char_type *s, streamsize n)
45 // assign up to n chars to s from input sequence, indexing in_cur as
46 // approp and returning the number of chars assigned
50 constraint_filebuf fb_02
;
51 fb_02
.open(name_02
, ios_base::out
| ios_base::trunc
);
52 VERIFY( !fb_02
.write_position() );
53 VERIFY( !fb_02
.read_position() );
54 strmsz_2
= fb_02
.in_avail();
55 strmsz_2
= fb_02
.sgetn(carray2
, 10);
56 VERIFY( strmsz_2
== 0 );
58 VERIFY( c2
== traits_type::eof() );
59 strmsz_1
= fb_02
.in_avail();
60 strmsz_2
= fb_02
.sgetn(carray2
, strmsz_1
+ 5);
61 VERIFY( strmsz_1
== -1 );
62 VERIFY( strmsz_2
== 0 );
64 VERIFY( c4
== traits_type::eof() );
65 VERIFY( !fb_02
.write_position() );
66 VERIFY( !fb_02
.read_position() );