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Diffstat (limited to 'gcc-4.9/libstdc++-v3/testsuite/performance/27_io/ifstream_getline-2.cc')
-rw-r--r-- | gcc-4.9/libstdc++-v3/testsuite/performance/27_io/ifstream_getline-2.cc | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/gcc-4.9/libstdc++-v3/testsuite/performance/27_io/ifstream_getline-2.cc b/gcc-4.9/libstdc++-v3/testsuite/performance/27_io/ifstream_getline-2.cc new file mode 100644 index 000000000..b3ec9215b --- /dev/null +++ b/gcc-4.9/libstdc++-v3/testsuite/performance/27_io/ifstream_getline-2.cc @@ -0,0 +1,93 @@ +// Copyright (C) 2004-2014 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 3, 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 COPYING3. If not see +// <http://www.gnu.org/licenses/>. + +#include <unistd.h> +#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; +} |