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Add strstr() function to the libkern.

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This commit is contained in:
pjd 2006-08-12 15:28:39 +00:00
parent 77645adfd4
commit 8860f3f878
3 changed files with 68 additions and 0 deletions
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4
sys/conf/files
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@ -1183,6 +1183,8 @@ geom/geom_sunlabel.c optional geom_sunlabel
geom/geom_sunlabel_enc.c optional geom_sunlabel
geom/geom_vfs.c standard
geom/geom_vol_ffs.c optional geom_vol
geom/journal/g_journal.c optional geom_journal
geom/journal/g_journal_ufs.c optional geom_journal
geom/label/g_label.c optional geom_label
geom/label/g_label_ext2fs.c optional geom_label
geom/label/g_label_iso9660.c optional geom_label
@ -1477,6 +1479,7 @@ libkern/strncmp.c standard
libkern/strncpy.c standard
libkern/strsep.c standard
libkern/strspn.c standard
libkern/strstr.c standard
libkern/strtol.c standard
libkern/strtoq.c standard
libkern/strtoul.c standard
@ -1942,6 +1945,7 @@ ufs/ufs/ufs_acl.c optional ffs
ufs/ufs/ufs_bmap.c optional ffs
ufs/ufs/ufs_dirhash.c optional ffs
ufs/ufs/ufs_extattr.c optional ffs
ufs/ufs/ufs_gjournal.c optional ffs
ufs/ufs/ufs_inode.c optional ffs
ufs/ufs/ufs_lookup.c optional ffs
ufs/ufs/ufs_quota.c optional ffs

63
sys/libkern/strstr.c Normal file
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@ -0,0 +1,63 @@
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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>
/*
* Find the first occurrence of find in s.
*/
char *
strstr(const char *s, const char *find)
{
char c, sc;
size_t len;
if ((c = *find++) != 0) {
len = strlen(find);
do {
do {
if ((sc = *s++) == 0)
return (NULL);
} while (sc != c);
} while (strncmp(s, find, len) != 0);
s--;
}
return (__DECONST(char *, s));
}

1
sys/sys/libkern.h
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@ -108,6 +108,7 @@ int strncmp(const char *, const char *, size_t);
char *strncpy(char * __restrict, const char * __restrict, size_t);
char *strsep(char **, const char *delim);
size_t strspn(const char *, const char *);
char *strstr(const char *, const char *);
int strvalid(const char *, size_t);
extern uint32_t crc32_tab[];