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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libstdc++-v3/] [testsuite/] [performance/] [27_io/] [ifstream_getline-2.cc] - Rev 19
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// Copyright (C) 2004 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 2, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING. If not, write to the Free // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, // USA. // As a special exception, you may use this file as part of a free software // library without restriction. Specifically, if other files instantiate // templates or use macros or inline functions from this file, or you compile // this file and link it with other files to produce an executable, this // file does not by itself cause the resulting executable to be covered by // the GNU General Public License. This exception does not however // invalidate any other reasons why the executable file might be covered by // the GNU General Public License. #include <cstdio> #include <fstream> #include <string> #include <testsuite_performance.h> // libstdc++/15002 int main() { using namespace std; using namespace __gnu_test; time_counter time; resource_counter resource; const char filename[] = "tmp_getline.txt"; const unsigned lines = 1000000; const unsigned line_length = 200; char* line = new char[line_length + 2]; // Construct data. { memset(line, 'x', line_length); line[line_length] = '\n'; line[line_length + 1] = '\0'; ofstream out(filename); for (unsigned i = 0; i < lines; ++i) out << line; } // C { // Fill the cache. FILE *file = fopen(filename, "r"); while (fgets(line, line_length + 2, file)); fclose(file); file = fopen(filename, "r"); start_counters(time, resource); while (fgets(line, line_length + 2, file)); stop_counters(time, resource); fclose(file); report_performance(__FILE__, "C (fgets)", time, resource); clear_counters(time, resource); } // getline(basic_istream<_CharT, _Traits>& __in, // basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim) { ifstream file(filename); string string_line; start_counters(time, resource); while (getline(file, string_line)); stop_counters(time, resource); report_performance(__FILE__, "C++ (string)", time, resource); clear_counters(time, resource); } // getline(char_type* __s, streamsize __n, char_type __delim) { ifstream file(filename); start_counters(time, resource); while (file.getline(line, line_length + 2)); stop_counters(time, resource); report_performance(__FILE__, "C++ (char array)", time, resource); clear_counters(time, resource); } delete[] line; unlink(filename); return 0; }