~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

 *

 *  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/math/int_val.h>

void Item_func_int_val::fix_num_length_and_dec()

{

  max_length= args[0]->max_length - (args[0]->decimals ?

                                     args[0]->decimals + 1 :

                                     0) + 2;

  uint32_t tmp= float_length(decimals);

  set_if_smaller(max_length,tmp);

  decimals= 0;

}

void Item_func_int_val::find_num_type()

{

  switch(hybrid_type= args[0]->result_type())

  {

  case STRING_RESULT:

  case REAL_RESULT:

    hybrid_type= REAL_RESULT;

    max_length= float_length(decimals);

    break;

  case INT_RESULT:

  case DECIMAL_RESULT:

    /*

      -2 because in most high position can't be used any digit for int64_t

      and one position for increasing value during operation

    */

    if ((args[0]->max_length - args[0]->decimals) >=

        (DECIMAL_LONGLONG_DIGITS - 2))

    {

      hybrid_type= DECIMAL_RESULT;

    }

    else

    {

      unsigned_flag= args[0]->unsigned_flag;

      hybrid_type= INT_RESULT;

    }

    break;

  default:

    assert(0);

  }

  return;

}