From: Sichen Zhao <1473996754@qq.com>
To: newlib@sourceware.org
Cc: gedare@rtems.org, joel@rtems.org,
christian.mauderer@embedded-brains.de,
Sichen Zhao <1473996754@qq.com>
Subject: [PATCH v2 1/2] Import strnstr.c from FreeBSD.
Date: Fri, 25 Aug 2017 06:21:00 -0000 [thread overview]
Message-ID: <1503641725-11948-1-git-send-email-1473996754@qq.com> (raw)
---
newlib/libc/string/strnstr.c | 65 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 newlib/libc/string/strnstr.c
diff --git a/newlib/libc/string/strnstr.c b/newlib/libc/string/strnstr.c
new file mode 100644
index 0000000..4de757d
--- /dev/null
+++ b/newlib/libc/string/strnstr.c
@@ -0,0 +1,65 @@
+/*-
+ * Copyright (c) 2001 Mike Barcroft <mike@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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strstr.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <string.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 ((char *)s);
+}
--
2.7.4
next reply other threads:[~2017-08-25 6:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-25 6:21 Sichen Zhao [this message]
2017-08-25 6:16 ` [PATCH v2 2/2] Port strnstr.c to newlib Sichen Zhao
2017-08-25 7:23 ` Sebastian Huber
2017-08-25 7:36 ` Sichen Zhao
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