Line data    Source code

       1             : /*      $OpenBSD: strnlen.c,v 1.2 2014/06/10 04:16:57 deraadt Exp $     */
       2             : 
       3             : /*
       4             :  * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com>
       5             :  *
       6             :  * Permission to use, copy, modify, and distribute this software for any
       7             :  * purpose with or without fee is hereby granted, provided that the above
       8             :  * copyright notice and this permission notice appear in all copies.
       9             :  *
      10             :  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      11             :  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      12             :  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
      13             :  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
      14             :  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
      15             :  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      16             :  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
      17             :  */
      18             : 
      19             : #include <sys/types.h>
      20             : #include <lib/libkern/libkern.h>
      21             : 
      22             : size_t
      23           0 : strnlen(const char *str, size_t maxlen)
      24             : {
      25             :         const char *cp;
      26             : 
      27           0 :         for (cp = str; maxlen != 0 && *cp != '\0'; cp++, maxlen--)
      28             :                 ;
      29             : 
      30           0 :         return (size_t)(cp - str);
      31             : }