~drizzle-trunk/drizzle/development

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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/time/curdate.h"
#include "drizzled/tztime.h"
#include "drizzled/temporal.h"
#include "drizzled/session.h"

void Item_func_curdate::fix_length_and_dec()
{
  collation.set(&my_charset_bin);
  decimals=0;
  max_length=MAX_DATE_WIDTH*MY_CHARSET_BIN_MB_MAXLEN;

  store_now_in_TIME(&ltime);

  /* We don't need to set second_part and neg because they already 0 */
  ltime.hour= ltime.minute= ltime.second= 0;
  ltime.time_type= DRIZZLE_TIMESTAMP_DATE;

  /** 
   * @TODO Remove ltime completely when timezones are reworked.  Using this
   * technique now to avoid a large patch...
   */
  cached_temporal.set_years(ltime.year);
  cached_temporal.set_months(ltime.month);
  cached_temporal.set_days(ltime.day);
}

/**
    Converts current time in time_t to DRIZZLE_TIME represenatation for local
    time zone. Defines time zone (local) used for whole CURDATE function.
*/
void Item_func_curdate_local::store_now_in_TIME(DRIZZLE_TIME *now_time)
{
  Session *session= current_session;
  session->variables.time_zone->gmt_sec_to_TIME(now_time,
                                                (time_t)session->query_start());
}

/**
    Converts current time in time_t to DRIZZLE_TIME represenatation for UTC
    time zone. Defines time zone (UTC) used for whole UTC_DATE function.
*/
void Item_func_curdate_utc::store_now_in_TIME(DRIZZLE_TIME *now_time)
{
  my_tz_UTC->gmt_sec_to_TIME(now_time,
                             (time_t)(current_session->query_start()));
  /*
    We are not flagging this query as using time zone, since it uses fixed
    UTC-SYSTEM time-zone.
  */
}

bool Item_func_curdate::get_temporal(drizzled::Date &to)
{
  to= cached_temporal;
  return true;
}