~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

 */

#ifndef DRIZZLED_KEY_MAP_H

#define DRIZZLED_KEY_MAP_H

#include <drizzled/global.h>

#include <drizzled/definitions.h>

#include <bitset>

/* Used for finding keys */

#if MAX_INDEXES <= 64

typedef std::bitset<72> key_map;

#else

typedef std::bitset<((MAX_INDEXES+7)/8*8)> key_map;

#endif

/* useful constants */

extern const key_map key_map_empty;

extern key_map key_map_full;          /* Should be threaded as const */

bool is_keymap_prefix(const key_map& map, const uint32_t n);

bool is_overlapping(const key_map& map, const key_map& map2);

void set_prefix(key_map& map, const uint32_t n);

void key_map_subtract(key_map& map1, key_map& map2);

#endif