~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/item/bin_string.h>

/*

  bin item.

  In string context this is a binary string. 

  In number context this is a int64_t value.

*/

Item_bin_string::Item_bin_string(const char *str, uint32_t str_length)

{

  const char *end= str + str_length - 1;

  unsigned char bits= 0;

  uint32_t power= 1;

  max_length= (str_length + 7) >> 3;

  char *ptr= (char*) sql_alloc(max_length + 1);

  if (!ptr)

    return;

  str_value.set(ptr, max_length, &my_charset_bin);

  ptr+= max_length - 1;

  ptr[1]= 0;                     // Set end null for string

  for (; end >= str; end--)

  {

    if (power == 256)

    {

      power= 1;

      *ptr--= bits;

      bits= 0;

    }

    if (*end == '1')

      bits|= power;

    power<<= 1;

  }

  *ptr= (char) bits;

  collation.set(&my_charset_bin, DERIVATION_COERCIBLE);

  fixed= 1;

}