58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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/* Linear search functions.
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Copyright (C) 1996-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <search.h>
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#include <string.h>
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void *
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lsearch (const void *key, void *base, size_t *nmemb, size_t size,
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__compar_fn_t compar)
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{
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void *result;
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/* Try to find it. */
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result = lfind (key, base, nmemb, size, compar);
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if (result == NULL)
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{
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/* Not available. Insert at the end. */
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result = memcpy (base + (*nmemb) * size, key, size);
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++(*nmemb);
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}
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return result;
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}
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void *
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lfind (const void *key, const void *base, size_t *nmemb, size_t size,
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__compar_fn_t compar)
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{
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const void *result = base;
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size_t cnt = 0;
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while (cnt < *nmemb && (*compar) (key, result) != 0)
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{
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result += size;
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++cnt;
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}
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return cnt < *nmemb ? (void *) result : NULL;
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}
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libc_hidden_def (lfind)
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