~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/functions/unsigned.h>

#include <drizzled/current_session.h>

#include <drizzled/error.h>

void Item_func_unsigned::print(String *str, enum_query_type query_type)

{

  str->append(STRING_WITH_LEN("cast("));

  args[0]->print(str, query_type);

  str->append(STRING_WITH_LEN(" as unsigned)"));

}

int64_t Item_func_unsigned::val_int()

{

  int64_t value;

  int error;

  if (args[0]->cast_to_int_type() == DECIMAL_RESULT)

  {

    my_decimal tmp, *dec= args[0]->val_decimal(&tmp);

    if (!(null_value= args[0]->null_value))

      my_decimal2int(E_DEC_FATAL_ERROR, dec, 1, &value);

    else

      value= 0;

    return value;

  }

  else if (args[0]->cast_to_int_type() != STRING_RESULT ||

           args[0]->result_as_int64_t())

  {

    value= args[0]->val_int();

    null_value= args[0]->null_value;

    return value;

  }

  value= val_int_from_str(&error);

  if (error < 0)

    push_warning(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN, ER_UNKNOWN_ERROR,

                 "Cast to unsigned converted negative integer to it's "

                 "positive complement");

  return value;

}