Author: raj
Date: Wed Jun 2 17:27:23 2010
New Revision: 208751
URL: http://svn.freebsd.org/changeset/base/208751
Log:
Provide memchr() in the libkern.
This is required by libfdt and will be compiled in conditionally only for
FDT-enabled platforms.
Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Added:
head/sys/libkern/memchr.c (contents, props changed)
Modified:
head/sys/sys/libkern.h
Added: head/sys/libkern/memchr.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/libkern/memchr.c Wed Jun 2 17:27:23 2010 (r208751)
@@ -0,0 +1,51 @@
+/*-
+ * 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.
+ * 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/libkern.h>
+#include <sys/param.h>
+
+void *
+memchr(const void *s, int c, size_t n)
+{
+ if (n != 0) {
+ const unsigned char *p = s;
+
+ do {
+ if (*p++ == (unsigned char)c)
+ return ((void *)(uintptr_t)(p - 1));
+ } while (--n != 0);
+ }
+ return (NULL);
+}
Modified: head/sys/sys/libkern.h
==============================================================================
--- head/sys/sys/libkern.h Wed Jun 2 17:24:41 2010 (r208750)
+++ head/sys/sys/libkern.h Wed Jun 2 17:27:23 2010 (r208751)
@@ -92,6 +92,7 @@ int flsl(long);
int fnmatch(const char *, const char *, int);
void gets(char *, size_t, int);
int locc(int, char *, u_int);
+void *memchr(const void *s, int c, size_t n);
int memcmp(const void *b1, const void *b2, size_t len);
void qsort(void *base, size_t nmemb, size_t size,
int (*compar)(const void *, const void *));
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