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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libstdc++-v3/] [testsuite/] [performance/] [27_io/] [ifstream_extract_float.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 <fstream> #include <sstream> #include <testsuite_performance.h> void test_extraction(int p = 6) { using namespace std; using namespace __gnu_test; const char* filename = "tmp_perf_float.txt"; const int iterations = 10000000; ostringstream oss; oss << "precision " << p; // Construct data. { ofstream out(filename); out.precision(p); for (int i = 0; i < iterations; ++i) { float f = i * 3.14159265358979323846; out << f << '\n'; } } { time_counter time; resource_counter resource; ifstream in(filename); in.precision(p); float f; start_counters(time, resource); for (int j, i = 0; i < iterations; ++i) in >> f; stop_counters(time, resource); report_performance(__FILE__, oss.str(), time, resource); } unlink(filename); }; int main() { test_extraction(6); test_extraction(12); return 0; }