string.h revision 1.3
1 1.3 riastrad /* $NetBSD: string.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_STRING_H_ 33 1.2 riastrad #define _LINUX_STRING_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/types.h> 36 1.2 riastrad #include <sys/cdefs.h> 37 1.2 riastrad #include <sys/null.h> 38 1.2 riastrad 39 1.3 riastrad #include <linux/slab.h> 40 1.3 riastrad 41 1.2 riastrad static inline void * 42 1.2 riastrad memchr_inv(const void *buffer, int c, size_t len) 43 1.2 riastrad { 44 1.2 riastrad const uint8_t byte = c; /* XXX lose */ 45 1.2 riastrad const char *p; 46 1.2 riastrad 47 1.2 riastrad for (p = buffer; len-- > 0; p++) 48 1.2 riastrad if (*p != byte) 49 1.2 riastrad return __UNCONST(p); 50 1.2 riastrad 51 1.2 riastrad return NULL; 52 1.2 riastrad } 53 1.2 riastrad 54 1.3 riastrad static inline void * 55 1.3 riastrad kmemdup(const void *src, size_t len, gfp_t gfp) 56 1.3 riastrad { 57 1.3 riastrad void *dst; 58 1.3 riastrad 59 1.3 riastrad dst = kmalloc(len, gfp); 60 1.3 riastrad if (dst == NULL) 61 1.3 riastrad return NULL; 62 1.3 riastrad 63 1.3 riastrad (void)memcpy(dst, src, len); 64 1.3 riastrad return dst; 65 1.3 riastrad } 66 1.3 riastrad 67 1.2 riastrad #endif /* _LINUX_STRING_H_ */ 68
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