/* Copyright (C) 2014 InfiniDB, Inc.

   This program 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; version 2 of
   the License.

   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 General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/****************************************************************************
 * $Id: func_sign.cpp 3495 2013-01-21 14:09:51Z rdempsey $
 *
 *
 ****************************************************************************/

#include <cstdlib>
#include <string>
#include <sstream>
using namespace std;

#include "functor_int.h"
#include "functioncolumn.h"
#include "rowgroup.h"
using namespace execplan;

namespace funcexp
{
CalpontSystemCatalog::ColType Func_sign::operationType(FunctionParm& fp,
                                                       CalpontSystemCatalog::ColType& resultType)
{
  CalpontSystemCatalog::ColType ct;
  ct.colDataType = CalpontSystemCatalog::BIGINT;
  ct.colWidth = 8;
  return ct;
}

int64_t Func_sign::getIntVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
                             CalpontSystemCatalog::ColType& op_ct)
{
  double val = parm[0]->data()->getDoubleVal(row, isNull);

  if (isNull)
    return 0;
  else if (val > 0)
    return 1;
  else if (val < 0)
    return -1;
  else
    return 0;
}

string Func_sign::getStrVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
                            CalpontSystemCatalog::ColType& op_ct)
{
  int64_t sign = getIntVal(row, parm, isNull, op_ct);

  if (sign > 0)
    return string("1");
  else if (sign < 0)
    return string("-1");
  else
    return string("0");
}

}  // namespace funcexp