1// 1999-08-11 bkoz
2
3// Copyright (C) 1999-2015 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// 27.6.1.3 unformatted input functions
21
22#include <cstring> // for strlen
23#include <istream>
24#include <sstream>
25#include <testsuite_hooks.h>
26
27// [patch] bits/istream.tcc - getline(char_type*,streamsize,char_type)
28// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00003.html
29void
30test05()
31{
32  const char* charray = "\n"
33"a\n"
34"aa\n"
35"aaa\n"
36"aaaa\n"
37"aaaaa\n"
38"aaaaaa\n"
39"aaaaaaa\n"
40"aaaaaaaa\n"
41"aaaaaaaaa\n"
42"aaaaaaaaaa\n"
43"aaaaaaaaaaa\n"
44"aaaaaaaaaaaa\n"
45"aaaaaaaaaaaaa\n"
46"aaaaaaaaaaaaaa\n";
47
48  bool test __attribute__((unused)) = true;
49  const std::streamsize it = 5;
50  std::streamsize br = 0;
51  char tmp[it];
52  std::stringbuf sb(charray, std::ios_base::in);
53  std::istream ifs(&sb);
54  std::streamsize blen = std::strlen(charray);
55  VERIFY(!(!ifs));
56  while(ifs.getline(tmp, it) || ifs.gcount())
57    {
58      br += ifs.gcount();
59      if(ifs.eof())
60        {
61          // Just sanity checks to make sure we've extracted the same
62          // number of chars that were in the streambuf
63          VERIFY(br == blen);
64          // Also, we should only set the failbit if we could
65          // _extract_ no chars from the stream, i.e. the first read
66          // returned EOF.
67          VERIFY(ifs.fail() && ifs.gcount() == 0);
68        }
69      else if(ifs.fail())
70        {
71	  // delimiter not read
72	  //
73	  // either
74	  // -> extracted no characters
75	  // or
76	  // -> n - 1 characters are stored
77          ifs.clear(ifs.rdstate() & ~std::ios::failbit);
78          VERIFY((ifs.gcount() == 0) || (std::strlen(tmp) == it - 1));
79          VERIFY(!(!ifs));
80          continue;
81        }
82      else
83        {
84	  // delimiter was read.
85	  //
86	  // -> strlen(__s) < n - 1
87	  // -> delimiter was seen -> gcount() > strlen(__s)
88          VERIFY(ifs.gcount() == static_cast<std::streamsize>(std::strlen(tmp) + 1) );
89          continue;
90        }
91    }
92}
93
94int
95main()
96{
97  test05();
98  return 0;
99}
100