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/** @file timegm.cc
* @brief Portable implementation of timegm().
*/
/* Copyright (c) 2013 Olly Betts
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <config.h>
#include "timegm.h"
#ifndef HAVE_TIMEGM
#include <stdlib.h> // For setenv() or putenv()
#include <time.h>
using namespace std;
time_t
timegm(struct tm *tm)
{
static bool set_tz = false;
if (!set_tz) {
#if HAVE_DECL__PUTENV_S
_putenv_s("TZ", "");
#elif defined HAVE_SETENV
setenv("TZ", "", 1);
#else
putenv(const_cast<char*>("TZ="));
#endif
tzset();
set_tz = true;
}
return mktime(tm);
}
#endif
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