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/* - 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 <drizzled/key_map.h>
namespace drizzled
{
bool is_keymap_prefix(const key_map& map, const uint32_t prefix_size)
{
size_t pos= 0;
for (; pos < prefix_size; pos++)
if (! map.test(pos))
return false;
/*TODO: huh?
uint32_t prefix_bits= prefix_size & 0x7;
if (prefix_bits && != (1 << prefix_bits)-1)
return false;
*/
for (; pos < map.size(); pos++)
if (map.test(pos))
return false;
return true;
}
void set_prefix(key_map& map, const uint32_t prefix_size)
{
size_t pos= 0;
for (; pos < prefix_size && pos < map.size(); pos++)
{
map.set(pos);
}
}
bool is_overlapping(const key_map& map, const key_map& map2)
{
size_t count;
for (count= 0; count < map.size(); count++)
{
if (map[count] & map2[count])
return false;
}
return true;
}
void key_map_subtract(key_map& map1, key_map& map2)
{
map1&= map2.flip();
map2.flip();
}
} /* namespace drizzled */
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