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Add strnlen() to libkern.

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This commit is contained in:
Jung-uk Kim 2011-10-04 23:53:47 +00:00
parent b77e3cbad1
commit f359758c4e
3 changed files with 44 additions and 0 deletions
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1
sys/conf/files
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@ -2553,6 +2553,7 @@ libkern/strlcpy.c standard
libkern/strlen.c standard
libkern/strncmp.c standard
libkern/strncpy.c standard
libkern/strnlen.c standard
libkern/strsep.c standard
libkern/strspn.c standard
libkern/strstr.c standard

42
sys/libkern/strnlen.c Normal file
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@ -0,0 +1,42 @@
/*-
* Copyright (c) 2009 David Schultz <das@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/libkern.h>
size_t
strnlen(const char *s, size_t maxlen)
{
size_t len;
for (len = 0; len < maxlen; len++, s++) {
if (!*s)
break;
}
return (len);
}

1
sys/sys/libkern.h
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@ -116,6 +116,7 @@ size_t strlen(const char *);
int strncasecmp(const char *, const char *, size_t);
int strncmp(const char *, const char *, size_t);
char *strncpy(char * __restrict, const char * __restrict, size_t);
size_t strnlen(const char *, size_t);
char *strsep(char **, const char *delim);
size_t strspn(const char *, const char *);
char *strstr(const char *, const char *);