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// Copyright (C) 2004-2015 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;
}
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