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// Copyright (C) 2003-2021 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
// 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
// <>.
#include <cstdio>
#include <cstring>
#include <fstream>
#include <langinfo.h>
#include <iconv.h>
#include <testsuite_performance.h>
// libstdc++/11602
int main(int argc, char** argv)
using namespace std;
using namespace __gnu_test;
time_counter time;
resource_counter resource;
const int iters = 300000;
wchar_t wbuf[1024];
char cbuf[1024];
wmemset(wbuf, L'a', 1024);
// C (iconv)
iconv_t cd = iconv_open(nl_langinfo(CODESET), "WCHAR_T");
start_counters(time, resource);
for (int i = 0; i < iters; ++i)
size_t inbytesleft = 1024 * sizeof(wchar_t);
size_t outbytesleft = 1024;
char* in = reinterpret_cast<char*>(wbuf);
char* out = cbuf;
iconv(cd, &in, &inbytesleft, &out, &outbytesleft);
stop_counters(time, resource);
report_performance(__FILE__, "C (iconv)", time, resource);
clear_counters(time, resource);
// C++ (codecvt)
locale loc;
const codecvt<wchar_t, char, mbstate_t>& cvt =
use_facet<codecvt<wchar_t, char, mbstate_t> >(loc);
mbstate_t state;
memset(&state, 0, sizeof(state));
start_counters(time, resource);
for (int i = 0; i < iters; ++i)
const wchar_t* from_next;
char* to_next;
cvt.out(state, wbuf, wbuf + 1024, from_next,
cbuf, cbuf + 1024, to_next);
stop_counters(time, resource);
report_performance(__FILE__, "C++ (codecvt)", time, resource);
return 0;