Drizzled Public API Documentation

key_map.h
1 /* - mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #pragma once
21 
22 #include <drizzled/definitions.h>
23 
24 #include <bitset>
25 
26 #include <drizzled/visibility.h>
27 
28 namespace drizzled
29 {
30 
31 /* Used for finding keys */
32 #if MAX_INDEXES <= 64
33 typedef std::bitset<72> key_map;
34 #else
35 typedef std::bitset<((MAX_INDEXES+7)/8*8)> key_map;
36 #endif
37 
38 /* useful constants */
39 extern const key_map key_map_empty;
40 extern DRIZZLED_API key_map key_map_full; /* Should be threaded as const */
41 
42 bool is_keymap_prefix(const key_map& map, const uint32_t n);
43 bool is_overlapping(const key_map& map, const key_map& map2);
44 void set_prefix(key_map& map, const uint32_t n);
45 void key_map_subtract(key_map& map1, key_map& map2);
46 
47 } /* namespace drizzled */
48