strlen.c revision 256281 
1/*-
2 * Copyright (c) 2006 M. Warner Losh.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: stable/10/sys/boot/arm/at91/libat91/strlen.c 168005 2007-03-28 21:12:43Z imp $");
28
29/******************************************************************************
30 *
31 * Filename: p_string.c
32 *
33 * Instantiation of basic string operations to prevent inclusion of full
34 * string library.  These are simple implementations not necessarily optimized
35 * for speed, but rather to show intent.
36 *
37 * Revision information:
38 *
39 * 20AUG2004	kb_admin	initial creation
40 * 12JAN2005	kb_admin	minor updates
41 *
42 * BEGIN_KBDD_BLOCK
43 * No warranty, expressed or implied, is included with this software.  It is
44 * provided "AS IS" and no warranty of any kind including statutory or aspects
45 * relating to merchantability or fitness for any purpose is provided.  All
46 * intellectual property rights of others is maintained with the respective
47 * owners.  This software is not copyrighted and is intended for reference
48 * only.
49 * END_BLOCK
50 *****************************************************************************/
51
52#include "lib.h"
53
54/*
55 * .KB_C_FN_DEFINITION_START
56 * int p_strlen(char *)
57 *  This global function returns the number of bytes starting at the pointer
58 * before (not including) the string termination character ('/0').
59 * .KB_C_FN_DEFINITION_END
60 */
61int
62p_strlen(const char *buffer)
63{
64	const char *ptr = buffer;
65	while (*ptr++)
66		continue;
67	return (ptr - buffer - 1);
68}
69