File: strnlen.c

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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
   
   This 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.
   
   This 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 this library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
   MA 02111-1307, USA */

/*  File   : strnlen.c
    Author : Michael Widenius
    Updated: 20 April 1984
    Defines: strnlen.
    strnlen(s, len) returns the length of s or len if s is longer than len.
*/

#include <global.h>
#include "m_string.h"

#ifndef HAVE_STRNLEN

uint strnlen(register const char *s, register uint maxlen)
{
  const char *end= (const char *)memchr(s, '\0', maxlen);
  return end ? (uint) (end - s) : maxlen;
}

#endif