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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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
#pragma once
#include <drizzled/memory/sql_alloc.h>
#include <drizzled/type/time.h>
#include <drizzled/type/time.h>
namespace drizzled
{
class String;
/**
This class represents abstract time zone and provides
basic interface for type::Time <-> type::Time::epoch_t conversion.
Actual time zones which are specified by DB, or via offset
or use system functions are its descendants.
*/
class Time_zone: public memory::SqlAlloc
{
public:
Time_zone() {} /* Remove gcc warning */
/**
Converts local time in broken down type::Time representation to
type::Time::epoch_t (UTC seconds since Epoch) represenation.
Returns 0 in case of error. Sets in_dst_time_gap to true if date provided
falls into spring time-gap (or lefts it untouched otherwise).
*/
virtual type::Time::epoch_t TIME_to_gmt_sec(const type::Time &t,
bool *in_dst_time_gap) const = 0;
/**
Converts time in type::Time::epoch_t representation to local time in
broken down type::Time representation.
*/
virtual void gmt_sec_to_TIME(type::Time &tmp, type::Time::epoch_t t) const = 0;
/**
Because of constness of String returned by get_name() time zone name
have to be already zeroended to be able to use String::ptr() instead
of c_ptr().
*/
virtual const String * get_name() const = 0;
/**
We need this only for surpressing warnings, objects of this type are
allocated on memory::Root and should not require destruction.
*/
virtual ~Time_zone() {};
};
extern Time_zone * my_tz_SYSTEM;
bool my_tz_init(Session *org_session, const char *default_tzname);
} /* namespace drizzled */
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