1// Copyright (C) 2004 Free Software Foundation
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 2, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING.  If not, write to the Free
16// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17// USA.
18
19// 27.6.1.3 unformatted input functions
20
21#include <cwchar> // for wcslen
22#include <istream>
23#include <sstream>
24#include <testsuite_hooks.h>
25
26// [patch] bits/istream.tcc - getline(char_type*,streamsize,char_type)
27// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00003.html
28void
29test05()
30{
31  const wchar_t* charray = L"\n"
32L"a\n"
33L"aa\n"
34L"aaa\n"
35L"aaaa\n"
36L"aaaaa\n"
37L"aaaaaa\n"
38L"aaaaaaa\n"
39L"aaaaaaaa\n"
40L"aaaaaaaaa\n"
41L"aaaaaaaaaa\n"
42L"aaaaaaaaaaa\n"
43L"aaaaaaaaaaaa\n"
44L"aaaaaaaaaaaaa\n"
45L"aaaaaaaaaaaaaa\n";
46
47  bool test __attribute__((unused)) = true;
48  const std::streamsize it = 5;
49  std::streamsize br = 0;
50  wchar_t tmp[it];
51  std::wstringbuf sb(charray, std::ios_base::in);
52  std::wistream ifs(&sb);
53  std::streamsize blen = std::wcslen(charray);
54  VERIFY(!(!ifs));
55  while(ifs.getline(tmp, it) || ifs.gcount())
56    {
57      br += ifs.gcount();
58      if(ifs.eof())
59        {
60          // Just sanity checks to make sure we've extracted the same
61          // number of chars that were in the streambuf
62          VERIFY( br == blen );
63          // Also, we should only set the failbit if we could
64          // _extract_ no chars from the stream, i.e. the first read
65          // returned EOF.
66          VERIFY( ifs.fail() && ifs.gcount() == 0 );
67        }
68      else if(ifs.fail())
69        {
70	  // delimiter not read
71	  //
72	  // either
73	  // -> extracted no characters
74	  // or
75	  // -> n - 1 characters are stored
76          ifs.clear(ifs.rdstate() & ~std::ios::failbit);
77          VERIFY( (ifs.gcount() == 0) || (std::wcslen(tmp) == it - 1) );
78          VERIFY( !(!ifs) );
79          continue;
80        }
81      else
82        {
83	  // delimiter was read.
84	  //
85	  // -> wcslen(__s) < n - 1
86	  // -> delimiter was seen -> gcount() > wcslen(__s)
87          VERIFY( ifs.gcount() == static_cast<std::streamsize>(std::wcslen(tmp)
88							       + 1) );
89          continue;
90        }
91    }
92}
93
94int
95main()
96{
97  test05();
98  return 0;
99}
100