/*
* TimeLink.cc
*
* Copyright (C) 2015 Linas Vepstas
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License v3 as
* published by the Free Software Foundation and including the
* exceptions at http://opencog.org/wiki/Licenses
*
* This program 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 Affero General Public
* License along with this program; if not, write to:
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <time.h>
#include <sys/time.h>
#include <opencog/atoms/value/FloatValue.h>
#include "TimeLink.h"
using namespace opencog;
TimeLink::TimeLink(const HandleSeq&& oset, Type t)
: FunctionLink(std::move(oset), t)
{
// Type must be as expected
if (not nameserver().isA(t, TIME_LINK))
{
const std::string& tname = nameserver().getTypeName(t);
throw InvalidParamException(TRACE_INFO,
"Expecting an TimeLink, got %s", tname.c_str());
}
if (0 < oset.size())
throw SyntaxException(TRACE_INFO,
"TimeLink does not expect any arguments");
}
// ---------------------------------------------------------------
ValuePtr TimeLink::execute(AtomSpace* as, bool silent)
{
// time_t now = time(nullptr);
struct timeval tv;
gettimeofday(&tv, nullptr);
double now = tv.tv_sec + 1.0e-6 * tv.tv_usec;
return ValuePtr(createFloatValue(now));
}
DEFINE_LINK_FACTORY(TimeLink, TIME_LINK)
/* ===================== END OF FILE ===================== */