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94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
// Copyright (C) 2004, 2009, 2011 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <unistd.h>
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#include <cstdio>
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#include <fstream>
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#include <string>
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#include <testsuite_performance.h>
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// libstdc++/15002
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int main()
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{
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using namespace std;
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using namespace __gnu_test;
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time_counter time;
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resource_counter resource;
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const char filename[] = "tmp_getline.txt";
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const unsigned lines = 1000000;
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const unsigned line_length = 200;
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char* line = new char[line_length + 2];
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// Construct data.
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{
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memset(line, 'x', line_length);
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line[line_length] = '\n';
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line[line_length + 1] = '\0';
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ofstream out(filename);
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for (unsigned i = 0; i < lines; ++i)
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out << line;
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}
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// C
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{
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// Fill the cache.
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FILE *file = fopen(filename, "r");
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while (fgets(line, line_length + 2, file));
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fclose(file);
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file = fopen(filename, "r");
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start_counters(time, resource);
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while (fgets(line, line_length + 2, file));
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stop_counters(time, resource);
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fclose(file);
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report_performance(__FILE__, "C (fgets)", time, resource);
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clear_counters(time, resource);
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}
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// getline(basic_istream<_CharT, _Traits>& __in,
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// basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
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{
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ifstream file(filename);
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string string_line;
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start_counters(time, resource);
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while (getline(file, string_line));
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stop_counters(time, resource);
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report_performance(__FILE__, "C++ (string)", time, resource);
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clear_counters(time, resource);
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}
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// getline(char_type* __s, streamsize __n, char_type __delim)
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{
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ifstream file(filename);
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start_counters(time, resource);
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while (file.getline(line, line_length + 2));
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stop_counters(time, resource);
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report_performance(__FILE__, "C++ (char array)", time, resource);
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clear_counters(time, resource);
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}
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delete[] line;
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unlink(filename);
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return 0;
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}
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