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string.h revision 1.3 
      1 /*	$NetBSD: string.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_STRING_H_
     33 #define _LINUX_STRING_H_
     34 
     35 #include <sys/types.h>
     36 #include <sys/cdefs.h>
     37 #include <sys/null.h>
     38 
     39 #include <linux/slab.h>
     40 
     41 static inline void *
     42 memchr_inv(const void *buffer, int c, size_t len)
     43 {
     44 	const uint8_t byte = c;	/* XXX lose */
     45 	const char *p;
     46 
     47 	for (p = buffer; len-- > 0; p++)
     48 		if (*p != byte)
     49 			return __UNCONST(p);
     50 
     51 	return NULL;
     52 }
     53 
     54 static inline void *
     55 kmemdup(const void *src, size_t len, gfp_t gfp)
     56 {
     57 	void *dst;
     58 
     59 	dst = kmalloc(len, gfp);
     60 	if (dst == NULL)
     61 		return NULL;
     62 
     63 	(void)memcpy(dst, src, len);
     64 	return dst;
     65 }
     66 
     67 #endif  /* _LINUX_STRING_H_ */
     68