~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/charset_info.h>

#include <drizzled/field.h>

#include <drizzled/internal/m_string.h>

#include <drizzled/item/int.h>

namespace drizzled

{

/**

  Create an item from a string we KNOW points to a valid int64_t

  end \\0 terminated number string.

  This is always 'signed'. Unsigned values are created with Item_uint()

*/

Item_int::Item_int(const char *str_arg, uint32_t length)

{

  char *end_ptr= (char*) str_arg + length;

  int error;

  value= internal::my_strtoll10(str_arg, &end_ptr, &error);

  max_length= (uint32_t) (end_ptr - str_arg);

  name= (char*) str_arg;

  fixed= 1;

}

type::Decimal *Item_int::val_decimal(type::Decimal *decimal_value)

{

  int2_class_decimal(E_DEC_FATAL_ERROR, value, unsigned_flag, decimal_value);

  return decimal_value;

}

String *Item_int::val_str(String *str)

{

  // following assert is redundant, because fixed=1 assigned in constructor

  assert(fixed == 1);

  str->set(value, &my_charset_bin);

  return str;

}

void Item_int::print(String *str, enum_query_type)

{

  // my_charset_bin is good enough for numbers

  str_value.set(value, &my_charset_bin);

  str->append(str_value);

}

int Item_int::save_in_field(Field *field, bool)

{

  int64_t nr=val_int();

  if (null_value)

    return set_field_to_null(field);

  field->set_notnull();

  return field->store(nr, unsigned_flag);

}

bool Item_int::eq(const Item *arg, bool) const

{

  /* No need to check for null value as basic constant can't be NULL */

  if (arg->basic_const_item() && arg->type() == type())

  {

    /*

      We need to cast off const to call val_int(). This should be OK for

      a basic constant.

    */

    Item *item= (Item*) arg;

    return item->val_int() == value && item->unsigned_flag == unsigned_flag;

  }

  return false;

}

} /* namespace drizzled */