1// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
2
3// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
4//
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)
9// any later version.
10
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.
15
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,
19// USA.
20
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 } }
24
25// 27.8.1.4 Overridden virtual functions
26
27#include <fstream>
28#include <testsuite_hooks.h>
29#include <testsuite_io.h>
30
31// @require@ %-*.tst %-*.txt
32// @diff@ %-*.tst %*.txt
33
34const char name_01[] = "sgetn.txt"; // file with data in it
35const char name_03[] = "tmp_sgetn_2io.tst"; // empty file, need to create
36
37// Test overloaded virtual functions.
38void test05()
39{
40  using namespace std;
41  using namespace __gnu_test;
42  typedef filebuf::int_type 	int_type;
43  typedef filebuf::traits_type 	traits_type;
44
45  bool test __attribute__((unused)) = true;
46
47  streamsize 			strmsz_1, strmsz_2;
48  char carray1[13] = "";
49  char carray2[8192] = "";
50  int_type 			c1, c4;
51
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
56
57  // in | out 1
58  {
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() );
66  }
67
68  // in | out 2
69  {
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 );
79    c1 = fb_01.sgetc();
80    VERIFY( c1 == 'b' );
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.
85    VERIFY( c4 == 'h' );
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() );
91  }
92}
93
94int main()
95{
96  test05();
97  return 0;
98}
99