[gcc] GCC 4.5.0=>4.5.1

gcc/libstdc++-v3/testsuite/performance/27_io/filebuf_sgetn_unbuf.cc

-// Copyright (C) 2004, 2005, 2006, 2007, 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 <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <testsuite_performance.h>
-
-// libstdc++/11722
-int main()
-{
-  using namespace std;
-  using namespace __gnu_test;
-
-  time_counter time;
-  resource_counter resource;
-
-  const int iterations = 500000;
-  const int chunksize = 100;
-
-  char* chunk = new char[chunksize];
-  const char* name1 = "/usr/share/dict/words";
-  const char* name2 = "/usr/share/dict/linux.words";
-  const char* name = name1;
-
-  // C
-  FILE* file;
-  if (!(file = fopen(name, "r")))
-    {
-      name = name2;
-      if (!(file = fopen(name, "r")))
-        exit(1);
-    }
-  setvbuf(file, 0, _IONBF, 0);
-  start_counters(time, resource);
-  for (int i = 0; i < iterations; ++i)
-    if (fread(chunk, 1, chunksize, file) < chunksize)
-      fseek(file, 0, SEEK_SET);
-  stop_counters(time, resource);
-  fclose(file);
-  report_performance(__FILE__, "C", time, resource);
-  clear_counters(time, resource);
-
-  // C unlocked
-  file = fopen(name, "r");
-  setvbuf(file, 0, _IONBF, 0);
-  start_counters(time, resource);
-  for (int i = 0; i < iterations; ++i)
-    if (fread_unlocked(chunk, 1, chunksize, file) < chunksize)
-      fseek(file, 0, SEEK_SET);
-  stop_counters(time, resource);
-  fclose(file);
-  report_performance(__FILE__, "C unlocked", time, resource);
-  clear_counters(time, resource);
-  
-  // C++
-  filebuf buf;
-  buf.pubsetbuf(0, 0);
-  buf.open(name, ios_base::in);
-  start_counters(time, resource);
-  for (int i = 0; i < iterations; ++i)
-    if (buf.sgetn(chunk, chunksize) < chunksize)
-      buf.pubseekoff(0, ios::beg);
-  stop_counters(time, resource);
-  report_performance(__FILE__, "C++", time, resource);
-
-  delete [] chunk;
-
-  return 0;
-}