Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / testsuite / performance / 27_io / ifstream_extract_float.cc

diff --git a/libstdc++-v3/testsuite/performance/27_io/ifstream_extract_float.cc b/libstdc++-v3/testsuite/performance/27_io/ifstream_extract_float.cc
new file mode 100644 (file)
index 0000000..2df70cc
--- /dev/null
+++ b/libstdc++-v3/testsuite/performance/27_io/ifstream_extract_float.cc
@@ -0,0 +1,67 @@
+// Copyright (C) 2004, 2009 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 <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;
+}