Drizzled Public API Documentation

mf_sort.cc
1 /* Copyright (C) 2000 MySQL AB
2 
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; version 2 of the License.
6 
7  This program is distributed in the hope that it will be useful,
8  but WITHOUT ANY WARRANTY; without even the implied warranty of
9  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  GNU General Public License for more details.
11 
12  You should have received a copy of the GNU General Public License
13  along with this program; if not, write to the Free Software
14  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
15 
16 /* Sort of string pointers in string-order with radix or qsort */
17 
18 #include <config.h>
19 
20 #include <drizzled/internal/my_sys.h>
21 #include <drizzled/internal/m_string.h>
22 
23 namespace drizzled {
24 namespace internal {
25 
26 void my_string_ptr_sort(unsigned char *base, uint32_t items, size_t size)
27 {
28 #if INT_MAX > 65536L
29  if (size <= 20 && items >= 1000 && items < 100000)
30  {
31  unsigned char** ptr= (unsigned char**) malloc(items*sizeof(char*));
32  radixsort_for_str_ptr((unsigned char**) base,items,size,ptr);
33  free((unsigned char*) ptr);
34  }
35  else
36 #else
37  assert(false);
38 #endif
39  {
40  if (size && items)
41  {
42  my_qsort2(base,items, sizeof(unsigned char*), get_ptr_compare(size),
43  (void*) &size);
44  }
45  }
46 }
47 
48 } /* namespace internal */
49 } /* namespace drizzled */