Add strspn() to libkern.
Ok'ed by: rwatson
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e5e6a46460
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=141665
@ -1252,6 +1252,7 @@ libkern/strlen.c standard
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libkern/strncmp.c standard
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libkern/strncpy.c standard
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libkern/strsep.c standard
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libkern/strspn.c standard
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libkern/strtol.c standard
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libkern/strtoq.c standard
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libkern/strtoul.c standard
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55
sys/libkern/strspn.c
Normal file
55
sys/libkern/strspn.c
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@ -0,0 +1,55 @@
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/libkern.h>
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/*
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* Span the string s2 (skip characters that are in s2).
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*/
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size_t
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strspn(s1, s2)
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const char *s1;
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const char *s2;
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{
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const char *p = s1, *spanp;
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char c, sc;
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/*
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* Skip any characters in s2, excluding the terminating \0.
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*/
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cont:
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c = *p++;
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for (spanp = s2; (sc = *spanp++) != 0;)
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if (sc == c)
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goto cont;
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return (p - 1 - s1);
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}
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@ -105,6 +105,7 @@ size_t strlen(const char *);
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int strncmp(const char *, const char *, size_t);
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char *strncpy(char * __restrict, const char * __restrict, size_t);
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char *strsep(char **, const char *delim);
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size_t strspn(const char *, const char *);
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int strvalid(const char *, size_t);
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