git: 4211457e40e0 - main - Add missing libkern/strnstr.c file
Neel Chauhan
nc at FreeBSD.org
Thu Jul 15 00:56:36 UTC 2021
The branch main has been updated by nc (ports committer):
URL: https://cgit.FreeBSD.org/src/commit/?id=4211457e40e07f6f820c4171c7db81f028fd23af
commit 4211457e40e07f6f820c4171c7db81f028fd23af
Author: Greg V <greg at unrelenting.technology>
AuthorDate: 2021-07-15 00:56:03 +0000
Commit: Neel Chauhan <nc at FreeBSD.org>
CommitDate: 2021-07-15 00:56:03 +0000
Add missing libkern/strnstr.c file
Apparently it wasn't picked up by git.
Reviewed by: bz, hselasky, nc
Differential Revision: https://reviews.freebsd.org/D31131
---
sys/libkern/strnstr.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/sys/libkern/strnstr.c b/sys/libkern/strnstr.c
new file mode 100644
index 000000000000..9183e2a7017d
--- /dev/null
+++ b/sys/libkern/strnstr.c
@@ -0,0 +1,64 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2001 Mike Barcroft <mike at FreeBSD.org>
+ * 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. 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>
+
+#include <sys/param.h>
+#include <sys/libkern.h>
+
+/*
+ * Find the first occurrence of find in s, where the search is limited to the
+ * first slen characters of s.
+ */
+char *
+strnstr(const char *s, const char *find, size_t slen)
+{
+ char c, sc;
+ size_t len;
+
+ if ((c = *find++) != '\0') {
+ len = strlen(find);
+ do {
+ do {
+ if (slen-- < 1 || (sc = *s++) == '\0')
+ return (NULL);
+ } while (sc != c);
+ if (len > slen)
+ return (NULL);
+ } while (strncmp(s, find, len) != 0);
+ s--;
+ }
+ return (__DECONST(char *, s));
+}
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