xid.cc

/* -*- 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 */