2 * Copyright (c) 2006 M. Warner Losh. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 /******************************************************************************
31 * Filename: p_string.c
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.
37 * Revision information:
39 * 20AUG2004 kb_admin initial creation
40 * 12JAN2005 kb_admin minor updates
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
50 *****************************************************************************/
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
62 p_strlen(const char *buffer)
64 const char *ptr = buffer;
67 return (ptr - buffer - 1);