1// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
2
3// Copyright (C) 2001-2015 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 3, 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 COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20// 27.8.1.4 Overridden virtual functions
21
22#include <fstream>
23#include <testsuite_hooks.h>
24#include <testsuite_io.h>
25
26// @require@ %-*.tst %-*.txt
27// @diff@ %-*.tst %*.txt
28
29const char name_02[] = "tmp_sgetn_1out.tst"; // empty file, need to create
30
31// Test overloaded virtual functions.
32void test05()
33{
34  using namespace std;
35  using namespace __gnu_test;
36  typedef filebuf::int_type 	int_type;
37  typedef filebuf::traits_type 	traits_type;
38
39  bool test __attribute__((unused)) = true;
40
41  streamsize 			strmsz_1, strmsz_2;
42  char carray2[8192] = "";
43  int_type 			c2, c4;
44
45  // streamsize sgetn(char_type *s, streamsize n)
46  // streamsize xsgetn(char_type *s, streamsize n)
47  // assign up to n chars to s from input sequence, indexing in_cur as
48  // approp and returning the number of chars assigned
49
50  // out
51  {
52    constraint_filebuf fb_02;
53    fb_02.open(name_02, ios_base::out | ios_base::trunc);
54    VERIFY( !fb_02.write_position() );
55    VERIFY( !fb_02.read_position() );
56    strmsz_2 = fb_02.in_avail();
57    strmsz_2 = fb_02.sgetn(carray2, 10);
58    VERIFY( strmsz_2 == 0 );
59    c2 = fb_02.sgetc();
60    VERIFY( c2 == traits_type::eof() );
61    strmsz_1 = fb_02.in_avail();
62    strmsz_2 = fb_02.sgetn(carray2, strmsz_1 + 5);
63    VERIFY( strmsz_1 == -1 );
64    VERIFY( strmsz_2 == 0 );
65    c4 = fb_02.sgetc();
66    VERIFY( c4 == traits_type::eof() );
67    VERIFY( !fb_02.write_position() );
68    VERIFY( !fb_02.read_position() );
69  }
70}
71
72int main()
73{
74  test05();
75  return 0;
76}
77