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// 27.8.1.4 Overridden virtual functions
22
23#include <fstream>
24#include <testsuite_hooks.h>
25#include <testsuite_io.h>
26
27// @require@ %-*.tst %-*.txt
28// @diff@ %-*.tst %*.txt
29
30const char name_02[] = "tmp_sgetn_1out.tst"; // empty file, need to create
31
32// Test overloaded virtual functions.
33void test05()
34{
35  using namespace std;
36  using namespace __gnu_test;
37  typedef filebuf::int_type 	int_type;
38  typedef filebuf::traits_type 	traits_type;
39
40  bool test __attribute__((unused)) = true;
41
42  streamsize 			strmsz_1, strmsz_2;
43  char carray2[8192] = "";
44  int_type 			c2, c4;
45
46  // streamsize sgetn(char_type *s, streamsize n)
47  // streamsize xsgetn(char_type *s, streamsize n)
48  // assign up to n chars to s from input sequence, indexing in_cur as
49  // approp and returning the number of chars assigned
50
51  // out
52  {
53    constraint_filebuf fb_02;
54    fb_02.open(name_02, ios_base::out | ios_base::trunc);
55    VERIFY( !fb_02.write_position() );
56    VERIFY( !fb_02.read_position() );
57    strmsz_2 = fb_02.in_avail();
58    strmsz_2 = fb_02.sgetn(carray2, 10);
59    VERIFY( strmsz_2 == 0 );
60    c2 = fb_02.sgetc();
61    VERIFY( c2 == traits_type::eof() );
62    strmsz_1 = fb_02.in_avail();
63    strmsz_2 = fb_02.sgetn(carray2, strmsz_1 + 5);
64    VERIFY( strmsz_1 == -1 );
65    VERIFY( strmsz_2 == 0 );
66    c4 = fb_02.sgetc();
67    VERIFY( c4 == traits_type::eof() );
68    VERIFY( !fb_02.write_position() );
69    VERIFY( !fb_02.read_position() );
70  }
71}
72
73int main()
74{
75  test05();
76  return 0;
77}
78