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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // The ARM simulator does not provide support for "fstat", which
22 // causes "in_avail" to return an incorrect value.
23 // { dg-do run { xfail arm*-*-elf arm*-*-eabi } }
25 // 27.8.1.4 Overridden virtual functions
28 #include <testsuite_hooks.h>
29 #include <testsuite_io.h>
31 // @require@ %-*.tst %-*.txt
32 // @diff@ %-*.tst %*.txt
34 const char name_01
[] = "sgetn.txt"; // file with data in it
35 const char name_03
[] = "tmp_sgetn_2io.tst"; // empty file, need to create
37 // Test overloaded virtual functions.
41 using namespace __gnu_test
;
42 typedef filebuf::int_type int_type
;
43 typedef filebuf::traits_type traits_type
;
45 bool test
__attribute__((unused
)) = true;
47 streamsize strmsz_1
, strmsz_2
;
48 char carray1
[13] = "";
49 char carray2
[8192] = "";
52 // streamsize sgetn(char_type *s, streamsize n)
53 // streamsize xsgetn(char_type *s, streamsize n)
54 // assign up to n chars to s from input sequence, indexing in_cur as
55 // approp and returning the number of chars assigned
59 constraint_filebuf fb_03
;
60 fb_03
.pubsetbuf(0, 0);
61 fb_03
.open(name_03
, ios_base::out
| ios_base::in
| ios_base::trunc
);
62 VERIFY( fb_03
.unbuffered() );
63 strmsz_1
= fb_03
.sgetn(carray1
, 10);
64 VERIFY( strmsz_1
== 0 );
65 VERIFY( fb_03
.unbuffered() );
70 constraint_filebuf fb_01
;
71 fb_01
.pubsetbuf(0, 0);
72 fb_01
.open(name_01
, ios_base::in
| ios_base::out
);
73 VERIFY( fb_01
.unbuffered() );
74 strmsz_1
= fb_01
.in_avail();
75 strmsz_2
= fb_01
.sgetn(carray1
, 10);
76 VERIFY( strmsz_2
== 10 );
77 strmsz_2
= fb_01
.in_avail();
78 VERIFY( strmsz_1
> strmsz_2
);
81 strmsz_1
= fb_01
.in_avail();
82 strmsz_2
= fb_01
.sgetn(carray2
, 8181 + 5);
83 VERIFY( 8181 == strmsz_2
- 5 );
84 c4
= fb_01
.sgetc(); // buffer should have underflowed from above.
86 strmsz_1
= fb_01
.in_avail();
87 VERIFY( strmsz_1
> 0 );
88 strmsz_2
= fb_01
.sgetn(carray2
, 65 + 5);
89 VERIFY( 65 == strmsz_2
); //at the end of the actual file
90 VERIFY( fb_01
.unbuffered() );