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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, 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <math.h>
#include <drizzled/function/math/mod.h>
#include <drizzled/type/decimal.h>
#include <algorithm>
using namespace std;
namespace drizzled
{
int64_t Item_func_mod::int_op()
{
assert(fixed == 1);
int64_t value= args[0]->val_int();
int64_t val2= args[1]->val_int();
int64_t result;
if ((null_value= args[0]->null_value || args[1]->null_value))
return 0;
if (val2 == 0)
{
signal_divide_by_null();
return 0;
}
if (args[0]->unsigned_flag)
result= args[1]->unsigned_flag ?
((uint64_t) value) % ((uint64_t) val2) : ((uint64_t) value) % val2;
else
result= args[1]->unsigned_flag ?
(int64_t)(value % ((uint64_t) val2)) : (int64_t)(value % val2);
return result;
}
double Item_func_mod::real_op()
{
assert(fixed == 1);
double value= args[0]->val_real();
double val2= args[1]->val_real();
if ((null_value= args[0]->null_value || args[1]->null_value))
return 0.0;
if (val2 == 0.0)
{
signal_divide_by_null();
return 0.0;
}
return fmod(value,val2);
}
type::Decimal *Item_func_mod::decimal_op(type::Decimal *decimal_value)
{
type::Decimal value1, *val1;
type::Decimal value2, *val2;
val1= args[0]->val_decimal(&value1);
if ((null_value= args[0]->null_value))
return 0;
val2= args[1]->val_decimal(&value2);
if ((null_value= args[1]->null_value))
return 0;
switch (class_decimal_mod(E_DEC_FATAL_ERROR & ~E_DEC_DIV_ZERO, decimal_value,
val1, val2)) {
case E_DEC_TRUNCATED:
case E_DEC_OK:
return decimal_value;
case E_DEC_DIV_ZERO:
signal_divide_by_null();
default:
null_value= 1;
return 0;
}
}
void Item_func_mod::result_precision()
{
decimals= max(args[0]->decimals, args[1]->decimals);
max_length= max(args[0]->max_length, args[1]->max_length);
}
void Item_func_mod::fix_length_and_dec()
{
Item_num_op::fix_length_and_dec();
maybe_null= 1;
unsigned_flag= args[0]->unsigned_flag;
}
} /* namespace drizzled */
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