1/* Perform binary search - inline version.
2 Copyright (C) 1991-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library 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 GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19__extern_inline void *
20bsearch (const void *__key, const void *__base, size_t __nmemb, size_t __size,
21 __compar_fn_t __compar)
22{
23 size_t __l, __u, __idx;
24 const void *__p;
25 int __comparison;
26
27 __l = 0;
28 __u = __nmemb;
29 while (__l < __u)
30 {
31 __idx = (__l + __u) / 2;
32 __p = (void *) (((const char *) __base) + (__idx * __size));
33 __comparison = (*__compar) (__key, __p);
34 if (__comparison < 0)
35 __u = __idx;
36 else if (__comparison > 0)
37 __l = __idx + 1;
38 else
39 return (void *) __p;
40 }
41
42 return NULL;
43}
44