1/* Linear search functions.
2 Copyright (C) 1996-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <search.h>
21#include <string.h>
22
23
24void *
25lsearch (const void *key, void *base, size_t *nmemb, size_t size,
26 __compar_fn_t compar)
27{
28 void *result;
29
30 /* Try to find it. */
31 result = lfind (key, base, nmemb, size, compar);
32 if (result == NULL)
33 {
34 /* Not available. Insert at the end. */
35 result = memcpy (base + (*nmemb) * size, key, size);
36 ++(*nmemb);
37 }
38
39 return result;
40}
41
42
43void *
44lfind (const void *key, const void *base, size_t *nmemb, size_t size,
45 __compar_fn_t compar)
46{
47 const void *result = base;
48 size_t cnt = 0;
49
50 while (cnt < *nmemb && (*compar) (key, result) != 0)
51 {
52 result += size;
53 ++cnt;
54 }
55
56 return cnt < *nmemb ? (void *) result : NULL;
57}
58libc_hidden_def (lfind)
59