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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
*/
#ifndef DRIZZLED_HYBRID_TYPE_H
#define DRIZZLED_HYBRID_TYPE_H
#include <stdint.h>
#include <drizzled/my_decimal.h>
/*************************************************************************/
/*
A framework to easily handle different return types for hybrid items
(hybrid item is an item whose operand can be of any type, e.g. integer,
real, decimal).
*/
class Hybrid_type_traits;
class Hybrid_type
{
public:
int64_t integer;
double real;
/*
Use two decimal buffers interchangeably to speed up += operation
which has no native support in decimal library.
Hybrid_type+= arg is implemented as dec_buf[1]= dec_buf[0] + arg.
The third decimal is used as a handy temporary storage.
*/
my_decimal dec_buf[3];
int used_dec_buf_no;
/*
Traits moved to a separate class to
a) be able to easily change object traits in runtime
b) they work as a differentiator for the union above
*/
const Hybrid_type_traits *traits;
Hybrid_type() {}
/* XXX: add traits->copy() when needed */
Hybrid_type(const Hybrid_type &rhs) :traits(rhs.traits) {}
};
#endif /* DRIZZLED_HYBRID_TYPE_H */
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