1// Copyright (C) 2005 Free Software Foundation, Inc.
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// As a special exception, you may use this file as part of a free software
20// library without restriction.  Specifically, if other files instantiate
21// templates or use macros or inline functions from this file, or you compile
22// this file and link it with other files to produce an executable, this
23// file does not by itself cause the resulting executable to be covered by
24// the GNU General Public License.  This exception does not however
25// invalidate any other reasons why the executable file might be covered by
26// the GNU General Public License.
27
28#include <cstdio>
29#include <fstream>
30#include <string>
31#include <testsuite_performance.h>
32
33// libstdc++/22515
34int main()
35{
36  using namespace std;
37  using namespace __gnu_test;
38
39  time_counter time;
40  resource_counter resource;
41
42  const char filename[] = "tmp_perf_chars.txt";
43  const unsigned lines = 200000;
44  const unsigned line_length = 200;
45
46  char* line = new char[line_length + 2];
47
48  // Construct data.
49  {
50    memset(line, 'x', line_length);
51    line[line_length] = '\n';
52    line[line_length + 1] = '\0';
53
54    ofstream out(filename);
55    for (unsigned i = 0; i < lines; ++i)
56      out << line;
57  }
58
59  // operator>>(basic_istream<char>& __in, basic_string<char>& __str)
60  {
61    start_counters(time, resource);
62    for (int iter = 0; iter < 25; ++iter)
63      {
64	ifstream file(filename);
65	string string_line;
66
67	while (file >> string_line);
68      }
69    stop_counters(time, resource);
70    report_performance(__FILE__, "string&", time, resource);
71    clear_counters(time, resource);
72  }
73
74  // operator>>(basic_istream<char>& __in, char* __s)
75  {
76    start_counters(time, resource);
77    for (int iter = 0; iter < 25; ++iter)
78      {
79	ifstream file(filename);
80
81	while (file >> line);
82      }
83    stop_counters(time, resource);
84    report_performance(__FILE__, "char*", time, resource);
85    clear_counters(time, resource);
86  }
87
88  delete[] line;
89  unlink(filename);
90  return 0;
91}
92