1// Copyright (C) 2004, 2005, 2006, 2007, 2009 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 3, 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 COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18// 27.6.1.3 unformatted input functions
19
20// { dg-require-fileio "" }
21
22#include <istream>
23#include <string>
24#include <fstream>
25#include <limits>
26#include <cstdlib>
27#include <testsuite_hooks.h>
28
29using namespace std;
30
31string prepare(string::size_type len, unsigned nchunks, char delim)
32{
33  string ret;
34  for (unsigned i = 0; i < nchunks; ++i)
35    {
36      for (string::size_type j = 0; j < len; ++j)
37	ret.push_back('a' + rand() % 26);
38      len *= 2;
39      ret.push_back(delim);
40    }
41  return ret;
42}
43
44void check(istream& stream, const string& str, unsigned nchunks, char delim)
45{
46  bool test __attribute__((unused)) = true;
47
48  string::size_type index = 0, index_new = 0;
49  unsigned n = 0;
50
51  while (stream.ignore(numeric_limits<streamsize>::max(), delim).good())
52    {
53      index_new = str.find(delim, index);
54      VERIFY( static_cast<string::size_type>(stream.gcount()) ==
55	      index_new - index + 1 );
56      index = index_new + 1;
57      ++n;
58    }
59  VERIFY( stream.gcount() == 0 );
60  VERIFY( !stream.fail() );
61  VERIFY( n == nchunks );
62}
63
64void test01()
65{
66  const char filename[] = "istream_ignore.txt";
67
68  const char delim = '|';
69  const unsigned nchunks = 10;
70  const string data = prepare(555, nchunks, delim);
71
72  ofstream ofstrm;
73  ofstrm.open(filename);
74  ofstrm.write(data.data(), data.size());
75  ofstrm.close();
76
77  ifstream ifstrm;
78  ifstrm.open(filename);
79  check(ifstrm, data, nchunks, delim);
80  ifstrm.close();
81}
82
83int main()
84{
85  test01();
86  return 0;
87}
88