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libkern: Implement strchrnul(3)

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This commit is contained in:
Conrad Meyer 2019-08-19 22:53:05 +00:00
parent 4153054a7c
commit 2b0ebb77e4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=351237
3 changed files with 43 additions and 0 deletions
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1
sys/conf/files
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@ -3974,6 +3974,7 @@ libkern/scanc.c standard
libkern/strcasecmp.c standard
libkern/strcat.c standard
libkern/strchr.c standard
libkern/strchrnul.c optional gdb
libkern/strcmp.c standard
libkern/strcpy.c standard
libkern/strcspn.c standard

41
sys/libkern/strchrnul.c Normal file
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@ -0,0 +1,41 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>
*
* 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/param.h>
#include <sys/libkern.h>
char *
strchrnul(const char *p, int ch)
{
for (; *p != 0 && *p != ch; p++)
;
return (__DECONST(char *, p));
}

1
sys/sys/libkern.h
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@ -170,6 +170,7 @@ void srandom(u_long);
int strcasecmp(const char *, const char *);
char *strcat(char * __restrict, const char * __restrict);
char *strchr(const char *, int);
char *strchrnul(const char *, int);
int strcmp(const char *, const char *);
char *strcpy(char * __restrict, const char * __restrict);
size_t strcspn(const char * __restrict, const char * __restrict) __pure;