Add strstr() function to the libkern.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=161243
@ -1183,6 +1183,8 @@ geom/geom_sunlabel.c optional geom_sunlabel
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geom/geom_sunlabel_enc.c optional geom_sunlabel
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geom/geom_vfs.c standard
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geom/geom_vol_ffs.c optional geom_vol
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geom/journal/g_journal.c optional geom_journal
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geom/journal/g_journal_ufs.c optional geom_journal
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geom/label/g_label.c optional geom_label
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geom/label/g_label_ext2fs.c optional geom_label
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geom/label/g_label_iso9660.c optional geom_label
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@ -1477,6 +1479,7 @@ 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/strstr.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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@ -1942,6 +1945,7 @@ ufs/ufs/ufs_acl.c optional ffs
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ufs/ufs/ufs_bmap.c optional ffs
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ufs/ufs/ufs_dirhash.c optional ffs
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ufs/ufs/ufs_extattr.c optional ffs
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ufs/ufs/ufs_gjournal.c optional ffs
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ufs/ufs/ufs_inode.c optional ffs
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ufs/ufs/ufs_lookup.c optional ffs
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ufs/ufs/ufs_quota.c optional ffs
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63
sys/libkern/strstr.c
Normal file
63
sys/libkern/strstr.c
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@ -0,0 +1,63 @@
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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/param.h>
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#include <sys/libkern.h>
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/*
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* Find the first occurrence of find in s.
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*/
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char *
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strstr(const char *s, const char *find)
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{
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char c, sc;
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size_t len;
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if ((c = *find++) != 0) {
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len = strlen(find);
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do {
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do {
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if ((sc = *s++) == 0)
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return (NULL);
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} while (sc != c);
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} while (strncmp(s, find, len) != 0);
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s--;
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}
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return (__DECONST(char *, s));
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}
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@ -108,6 +108,7 @@ 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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char *strstr(const char *, const char *);
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int strvalid(const char *, size_t);
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extern uint32_t crc32_tab[];
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