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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 "drizzled/function/time/makedate.h"
#include "drizzled/time_functions.h"
namespace drizzled
{
/**
MAKEDATE(a,b) is a date function that creates a date value
from a year and day value.
NOTES:
As arguments are integers, we can't know if the year is a 2 digit or 4 digit year.
In this case we treat all years < 100 as 2 digit years. Ie, this is not safe
for dates between 0000-01-01 and 0099-12-31
*/
String *Item_func_makedate::val_str(String *str)
{
assert(fixed == 1);
type::Time l_time;
long daynr= (long) args[1]->val_int();
long year= (long) args[0]->val_int();
long days;
if (args[0]->null_value || args[1]->null_value ||
year < 0 || daynr <= 0)
goto err;
if (year < 100)
year= year_2000_handling(year);
days= calc_daynr(year,1,1) + daynr - 1;
/* Day number from year 0 to 9999-12-31 */
if (days >= 0 && days <= MAX_DAY_NUMBER)
{
null_value=0;
get_date_from_daynr(days,&l_time.year,&l_time.month,&l_time.day);
if (str->alloc(type::Time::MAX_STRING_LENGTH))
goto err;
l_time.convert(*str, type::DRIZZLE_TIMESTAMP_DATE);
return str;
}
err:
null_value=1;
return 0;
}
/*
MAKEDATE(a,b) is a date function that creates a date value
from a year and day value.
NOTES:
As arguments are integers, we can't know if the year is a 2 digit or 4 digit year.
In this case we treat all years < 100 as 2 digit years. Ie, this is not safe
for dates between 0000-01-01 and 0099-12-31
*/
int64_t Item_func_makedate::val_int()
{
assert(fixed == 1);
type::Time l_time;
long daynr= (long) args[1]->val_int();
long year= (long) args[0]->val_int();
long days;
if (args[0]->null_value || args[1]->null_value ||
year < 0 || daynr <= 0)
goto err;
if (year < 100)
year= year_2000_handling(year);
days= calc_daynr(year,1,1) + daynr - 1;
/* Day number from year 0 to 9999-12-31 */
if (days >= 0 && days < MAX_DAY_NUMBER)
{
null_value=0;
get_date_from_daynr(days,&l_time.year,&l_time.month,&l_time.day);
return (int64_t) (l_time.year * 10000L + l_time.month * 100 + l_time.day);
}
err:
null_value= 1;
return 0;
}
} /* namespace drizzled */
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