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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <drizzled/server_includes.h>
#include CSTDINT_H
#include <drizzled/function/bit.h>
// Shift-functions, same as << and >> in C/C++
int64_t Item_func_shift_left::val_int()
{
assert(fixed == 1);
uint32_t shift;
uint64_t res= ((uint64_t) args[0]->val_int() <<
(shift=(uint32_t) args[1]->val_int()));
if (args[0]->null_value || args[1]->null_value)
{
null_value=1;
return 0;
}
null_value=0;
return (shift < sizeof(int64_t)*8 ? (int64_t) res : 0L);
}
int64_t Item_func_shift_right::val_int()
{
assert(fixed == 1);
uint32_t shift;
uint64_t res= (uint64_t) args[0]->val_int() >>
(shift=(uint32_t) args[1]->val_int());
if (args[0]->null_value || args[1]->null_value)
{
null_value=1;
return 0;
}
null_value=0;
return (shift < sizeof(int64_t)*8 ? (int64_t) res : 0);
}
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