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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/last_day.h>
#include <drizzled/error.h>
#include <drizzled/calendar.h>
#include <drizzled/temporal.h>
#include <sstream>
#include <string>
namespace drizzled
{
/**
* Interpret the first argument as a DateTime string and then populate
* our supplied temporal object with a Date representing the last day of
* the corresponding month and year.
*/
bool Item_func_last_day::get_temporal(Date &to)
{
assert(fixed);
/* We return NULL from LAST_DAY() only when supplied a NULL argument */
if (args[0]->null_value)
{
null_value= true;
return false;
}
/* We use a DateTime to match as many temporal formats as possible. */
DateTime temporal;
Item_result arg0_result_type= args[0]->result_type();
switch (arg0_result_type)
{
case REAL_RESULT:
case DECIMAL_RESULT:
/*
* For doubles supplied, interpret the arg as a string,
* so intentionally fall-through here...
* This allows us to accept double parameters like
* 19971231235959.01 and interpret it the way MySQL does:
* as a TIMESTAMP-like thing with a microsecond component.
* Ugh, but need to keep backwards-compat.
*/
case STRING_RESULT:
{
char buff[DRIZZLE_MAX_LENGTH_DATETIME_AS_STRING];
String tmp(buff,sizeof(buff), &my_charset_utf8_bin);
String *res= args[0]->val_str(&tmp);
if (! res)
{
/*
* Likely a nested function issue where the nested
* function had bad input. We rely on the nested
* function my_error() and simply return false here.
*/
return false;
}
if (res != &tmp)
{
tmp.copy(*res);
}
if (! temporal.from_string(tmp.c_ptr(), tmp.length()))
{
/*
* Could not interpret the function argument as a temporal value,
* so throw an error and return 0
*/
my_error(ER_INVALID_DATETIME_VALUE, MYF(0), tmp.c_ptr());
return false;
}
}
break;
case INT_RESULT:
if (temporal.from_int64_t(args[0]->val_int()))
break;
/* Intentionally fall-through on invalid conversion from integer */
default:
{
/*
* Could not interpret the function argument as a temporal value,
* so throw an error and return 0
*/
null_value= true;
char buff[DRIZZLE_MAX_LENGTH_DATETIME_AS_STRING];
String tmp(buff,sizeof(buff), &my_charset_utf8_bin);
String *res;
res= args[0]->val_str(&tmp);
if (! res)
{
/*
* Likely a nested function issue where the nested
* function had bad input. We rely on the nested
* function my_error() and simply return false here.
*/
return false;
}
if (res != &tmp)
{
tmp.copy(*res);
}
my_error(ER_INVALID_DATETIME_VALUE, MYF(0), tmp.c_ptr());
return false;
}
}
null_value= false;
/* Now strip to the last day of the month... */
temporal.set_days(days_in_gregorian_year_month(temporal.years(), temporal.months()));
to= temporal; /* Operator overload in effect for assign DateTime to Date. */
return true;
}
} /* namespace drizzled */
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