mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
|
/* Perform binary search - inline version.
|
||
|
|
Copyright (C) 1991-2013 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library 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
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<http://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
__extern_inline void *
|
||
|
|
bsearch (const void *__key, const void *__base, size_t __nmemb, size_t __size,
|
||
|
|
__compar_fn_t __compar)
|
||
|
|
{
|
||
|
|
size_t __l, __u, __idx;
|
||
|
|
const void *__p;
|
||
|
|
int __comparison;
|
||
|
|
|
||
|
|
__l = 0;
|
||
|
|
__u = __nmemb;
|
||
|
|
while (__l < __u)
|
||
|
|
{
|
||
|
|
__idx = (__l + __u) / 2;
|
||
|
|
__p = (void *) (((const char *) __base) + (__idx * __size));
|
||
|
|
__comparison = (*__compar) (__key, __p);
|
||
|
|
if (__comparison < 0)
|
||
|
|
__u = __idx;
|
||
|
|
else if (__comparison > 0)
|
||
|
|
__l = __idx + 1;
|
||
|
|
else
|
||
|
|
return (void *) __p;
|
||
|
|
}
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|