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authorRoland McGrath <roland@gnu.org>1996-06-07 04:36:10 +0000
committerRoland McGrath <roland@gnu.org>1996-06-07 04:36:10 +0000
commit1be6ec30336a318dd50f9d9a45c8066860ec07f2 (patch)
tree8399c167a53cfe3ab9cdf27018730dda3c6a4d1b /misc/lsearch.c
parentc035afc9605510b5437515b71e0603c12463c2e9 (diff)
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Fri Jun 7 1996 05:29:32 Ulrich Drepper <drepper@cygnus.com>cvs/libc-960607
* misc/lsearch.c: New file. Implementation of lfind and lsearch functions. * misc/search.h: Add prototype for functions from tsearch family with __ prefix. Correct prototype for lsearch: BASE parameter must not be const. * misc/tsearch.c: prepend all global function names with __ and make normal names weak aliases. Fri Jun 7 00:15:24 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * Make-dist (sysdep_dirs): Skip CVS dirs.
Diffstat (limited to 'misc/lsearch.c')
-rw-r--r--misc/lsearch.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/misc/lsearch.c b/misc/lsearch.c
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+++ b/misc/lsearch.c
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+/* Linear search functions.
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#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. */
+ 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;
+}