1/* Linear search functions.
2 Copyright (C) 1996-2023 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 <https://www.gnu.org/licenses/>. */
18
19#include <search.h>
20#include <string.h>
21
22
23void *
24lsearch (const void *key, void *base, size_t *nmemb, size_t size,
25 __compar_fn_t compar)
26{
27 void *result;
28
29 /* Try to find it. */
30 result = lfind (key, base, nmemb, size, compar);
31 if (result == NULL)
32 {
33 /* Not available. Insert at the end. */
34 result = memcpy (base + (*nmemb) * size, key, size);
35 ++(*nmemb);
36 }
37
38 return result;
39}
40
41
42void *
43lfind (const void *key, const void *base, size_t *nmemb, size_t size,
44 __compar_fn_t compar)
45{
46 const void *result = base;
47 size_t cnt = 0;
48
49 while (cnt < *nmemb && (*compar) (key, result) != 0)
50 {
51 result += size;
52 ++cnt;
53 }
54
55 return cnt < *nmemb ? (void *) result : NULL;
56}
57libc_hidden_def (lfind)
58