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-rw-r--r--lib/strnlen.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/lib/strnlen.c b/lib/strnlen.c
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+++ b/lib/strnlen.c
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+/* Find the length of STRING, but scan at most MAXLEN characters.
+ Copyright (C) 1996, 1997, 1998, 2000-2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+#undef strnlen
+
+#include <string.h>
+
+#undef __strnlen
+#undef strnlen
+
+#ifndef _LIBC
+# define strnlen rpl_strnlen
+#endif
+
+#ifndef weak_alias
+# define __strnlen strnlen
+#endif
+
+/* Find the length of STRING, but scan at most MAXLEN characters.
+ If no '\0' terminator is found in that many characters, return MAXLEN. */
+
+size_t
+__strnlen (const char *string, size_t maxlen)
+{
+ const char *end = memchr (string, '\0', maxlen);
+ return end ? (size_t) (end - string) : maxlen;
+}
+#ifdef weak_alias
+weak_alias (__strnlen, strnlen)
+#endif