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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 <boost/lexical_cast.hpp>
#include "drizzled/function/time/from_unixtime.h"
#include "drizzled/session.h"
#include "drizzled/temporal.h"
#include "drizzled/time_functions.h"
#include <sstream>
#include <string>
namespace drizzled
{
void Item_func_from_unixtime::fix_length_and_dec()
{
session= current_session;
collation.set(&my_charset_bin);
decimals= DATETIME_DEC;
max_length=type::Time::MAX_STRING_LENGTH*MY_CHARSET_BIN_MB_MAXLEN;
maybe_null= 1;
}
String *Item_func_from_unixtime::val_str(String *str)
{
type::Time time_tmp;
assert(fixed == 1);
if (get_date(time_tmp, 0))
return 0;
if (str->alloc(type::Time::MAX_STRING_LENGTH))
{
null_value= 1;
return 0;
}
time_tmp.convert(*str);
return str;
}
int64_t Item_func_from_unixtime::val_int()
{
type::Time time_tmp;
assert(fixed == 1);
if (get_date(time_tmp, 0))
return 0;
int64_t ret;
time_tmp.convert(ret);
return (int64_t) ret;
}
bool Item_func_from_unixtime::get_date(type::Time <ime, uint32_t)
{
uint64_t tmp= 0;
type::Time::usec_t fractional_tmp= 0;
switch (args[0]->result_type()) {
case REAL_RESULT:
case ROW_RESULT:
case DECIMAL_RESULT:
case STRING_RESULT:
{
double double_tmp= args[0]->val_real();
tmp= (uint64_t)(double_tmp);
fractional_tmp= (type::Time::usec_t)((uint64_t)((double_tmp - tmp) * type::Time::FRACTIONAL_DIGITS) % type::Time::FRACTIONAL_DIGITS);
break;
}
case INT_RESULT:
tmp= (uint64_t)(args[0]->val_int());
break;
}
/*
"tmp > TIMESTAMP_MAX_VALUE" check also covers case of negative
from_unixtime() argument since tmp is unsigned.
*/
if ((null_value= (args[0]->null_value || tmp > TIMESTAMP_MAX_VALUE)))
return 1;
ltime.reset();
ltime.store(tmp, fractional_tmp);
return 0;
}
} /* namespace drizzled */
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