mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/* Linear search functions.
|
|
Copyright (C) 1996-2024 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <search.h>
|
|
#include <string.h>
|
|
|
|
|
|
void *
|
|
lsearch (const void *key, void *base, size_t *nmemb, size_t size,
|
|
__compar_fn_t compar)
|
|
{
|
|
void *result;
|
|
|
|
/* Try to find it. */
|
|
result = lfind (key, base, nmemb, size, compar);
|
|
if (result == NULL)
|
|
{
|
|
/* Not available. Insert at the end. */
|
|
result = memcpy (base + (*nmemb) * size, key, size);
|
|
++(*nmemb);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
void *
|
|
lfind (const void *key, const void *base, size_t *nmemb, size_t size,
|
|
__compar_fn_t compar)
|
|
{
|
|
const void *result = base;
|
|
size_t cnt = 0;
|
|
|
|
while (cnt < *nmemb && (*compar) (key, result) != 0)
|
|
{
|
|
result += size;
|
|
++cnt;
|
|
}
|
|
|
|
return cnt < *nmemb ? (void *) result : NULL;
|
|
}
|
|
libc_hidden_def (lfind)
|