1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001, 2002, 2003, 2006, 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 // The ARM simulator does not provide support for "fstat", which
21 // causes "in_avail" to return an incorrect value.
22 // { dg-do run { xfail arm*-*-elf arm*-*-eabi } }
24 // 27.8.1.4 Overridden virtual functions
26 // { dg-require-fileio "" }
29 #include <testsuite_hooks.h>
30 #include <testsuite_io.h>
32 // @require@ %-*.tst %-*.txt
33 // @diff@ %-*.tst %*.txt
35 const char name_01[] = "sgetn.txt"; // file with data in it
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_01;
60 fb_01.pubsetbuf(0, 0);
61 fb_01.open(name_01, ios_base::in);
62 VERIFY( fb_01.unbuffered() );
63 strmsz_1 = fb_01.in_avail();
64 strmsz_2 = fb_01.sgetn(carray1, 10);
65 VERIFY( strmsz_2 == 10 );
66 strmsz_2 = fb_01.in_avail();
67 VERIFY( strmsz_1 > strmsz_2 );
70 strmsz_1 = fb_01.in_avail(); // 8181 or 8250 depending on buffer
71 strmsz_2 = fb_01.sgetn(carray2, 8181 + 5);
72 VERIFY( 8181 == strmsz_2 - 5 );
73 c4 = fb_01.sgetc(); // buffer should have underflowed from above.
75 strmsz_1 = fb_01.in_avail();
76 VERIFY( strmsz_1 > 0 );
77 strmsz_2 = fb_01.sgetn(carray2, 65 + 5);
78 VERIFY( 70 == strmsz_2 ); // at the end of the actual file
79 VERIFY( fb_01.unbuffered() );