~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 <cstring>

#include <drizzled/xid.h>

#include <drizzled/charset.h>

namespace drizzled {

void XID::set(uint64_t xid)

{

  formatID= 1;

  set(DRIZZLE_XID_PREFIX_LEN, 0, DRIZZLE_XID_PREFIX);

  memcpy(data + DRIZZLE_XID_PREFIX_LEN, &server_id, sizeof(server_id));

  my_xid tmp= xid;

  memcpy(data + DRIZZLE_XID_OFFSET, &tmp, sizeof(tmp));

  gtrid_length= DRIZZLE_XID_GTRID_LEN;

}

void XID::set(long g, long b, const char *d)

{

  formatID= 1;

  gtrid_length= g;

  bqual_length= b;

  memcpy(data, d, g+b);

}

bool XID::is_null() const

{

  return formatID == -1;

}

void XID::set_null()

{

  formatID= -1;

}

my_xid XID::quick_get_my_xid()

{

  my_xid tmp;

  memcpy(&tmp, data + DRIZZLE_XID_OFFSET, sizeof(tmp));

  return tmp;

}

my_xid XID::get_my_xid()

{

  return gtrid_length == DRIZZLE_XID_GTRID_LEN && bqual_length == 0 &&

    !memcmp(data+DRIZZLE_XID_PREFIX_LEN, &server_id, sizeof(server_id)) &&

    !memcmp(data, DRIZZLE_XID_PREFIX, DRIZZLE_XID_PREFIX_LEN) ?

    quick_get_my_xid() : 0;

}

uint32_t XID::length() const

{

  return sizeof(formatID)+sizeof(gtrid_length)+sizeof(bqual_length)+

    gtrid_length+bqual_length;

}

} /* namespace drizzled */