~drizzle-trunk/drizzle/development

/* -*- 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/definitions.h>

#include <drizzled/field.h>

#include <drizzled/hybrid_type.h>

#include <drizzled/hybrid_type_traits_decimal.h>

#include <drizzled/item.h>

#include <algorithm>

using namespace std;

namespace drizzled

{

/* Hybrid_type_traits_decimal */

static const Hybrid_type_traits_decimal decimal_traits_instance;

Item_result Hybrid_type_traits_decimal::type() const { return DECIMAL_RESULT; }

void

Hybrid_type_traits_decimal::fix_length_and_dec(Item *item, Item *arg) const

{

  item->decimals= arg->decimals;

  item->max_length= min(arg->max_length + DECIMAL_LONGLONG_DIGITS,

                        (unsigned int)DECIMAL_MAX_STR_LENGTH);

}

void Hybrid_type_traits_decimal::set_zero(Hybrid_type *val) const

{

  val->dec_buf[0].set_zero();

  val->used_dec_buf_no= 0;

}

void Hybrid_type_traits_decimal::add(Hybrid_type *val, Field *f) const

{

  class_decimal_add(E_DEC_FATAL_ERROR,

                 &val->dec_buf[val->used_dec_buf_no ^ 1],

                 &val->dec_buf[val->used_dec_buf_no],

                 f->val_decimal(&val->dec_buf[2]));

  val->used_dec_buf_no^= 1;

}

/**

  @todo

  what is '4' for scale?

*/

void Hybrid_type_traits_decimal::div(Hybrid_type *val, uint64_t u) const

{

  int2_class_decimal(E_DEC_FATAL_ERROR, u, true, &val->dec_buf[2]);

  /* XXX: what is '4' for scale? */

  class_decimal_div(E_DEC_FATAL_ERROR,

                 &val->dec_buf[val->used_dec_buf_no ^ 1],

                 &val->dec_buf[val->used_dec_buf_no],

                 &val->dec_buf[2], 4);

  val->used_dec_buf_no^= 1;

}

int64_t

Hybrid_type_traits_decimal::val_int(Hybrid_type *val, bool unsigned_flag) const

{

  int64_t result;

  val->dec_buf[val->used_dec_buf_no].val_int32(E_DEC_FATAL_ERROR, unsigned_flag, &result);

  return result;

}

double

Hybrid_type_traits_decimal::val_real(Hybrid_type *val) const

{

  class_decimal2double(E_DEC_FATAL_ERROR, &val->dec_buf[val->used_dec_buf_no],

                    &val->real);

  return val->real;

}

type::Decimal *Hybrid_type_traits_decimal::val_decimal(Hybrid_type *val,

                                                    type::Decimal *) const

{ return &val->dec_buf[val->used_dec_buf_no]; }

String *

Hybrid_type_traits_decimal::val_str(Hybrid_type *val, String *to,

                                    uint8_t decimals) const

{

  class_decimal_round(E_DEC_FATAL_ERROR, &val->dec_buf[val->used_dec_buf_no],

                   decimals, false, &val->dec_buf[2]);

  class_decimal2string(&val->dec_buf[2], 0, to);

  return to;

}

const Hybrid_type_traits_decimal *Hybrid_type_traits_decimal::instance()

{

  return &decimal_traits_instance;

}

Hybrid_type_traits_decimal::Hybrid_type_traits_decimal()

{}

} /* namespace drizzled */