strnlen.c revision 302408
1193323Sed/*- 2193323Sed * Copyright (c) 2009 David Schultz <das@FreeBSD.org> 3193323Sed * All rights reserved. 4193323Sed * 5193323Sed * Redistribution and use in source and binary forms, with or without 6193323Sed * modification, are permitted provided that the following conditions 7193323Sed * are met: 8193323Sed * 1. Redistributions of source code must retain the above copyright 9193323Sed * notice, this list of conditions and the following disclaimer. 10193323Sed * 2. Redistributions in binary form must reproduce the above copyright 11193323Sed * notice, this list of conditions and the following disclaimer in the 12193323Sed * documentation and/or other materials provided with the distribution. 13193323Sed * 14193323Sed * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15193323Sed * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16198892Srdivacky * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17193323Sed * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18224145Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19205218Srdivacky * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20224145Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21201360Srdivacky * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22193323Sed * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23198090Srdivacky * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24204642Srdivacky * SUCH DAMAGE. 25193323Sed */ 26198090Srdivacky 27224145Sdim#include <sys/cdefs.h> 28193323Sed__FBSDID("$FreeBSD: stable/11/lib/libc/string/strnlen.c 189136 2009-02-28 06:00:58Z das $"); 29193323Sed 30224145Sdim#include <string.h> 31205218Srdivacky 32193323Sedsize_t 33193323Sedstrnlen(const char *s, size_t maxlen) 34193323Sed{ 35198090Srdivacky size_t len; 36193323Sed 37202375Srdivacky for (len = 0; len < maxlen; len++, s++) { 38198090Srdivacky if (!*s) 39193323Sed break; 40193323Sed } 41193323Sed return (len); 42193323Sed} 43193323Sed