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88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* $NetBSD: string.h,v 1.4 2015/02/25 14:55:57 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_STRING_H_
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#define _LINUX_STRING_H_
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#include <sys/types.h>
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#include <sys/cdefs.h>
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#include <sys/null.h>
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#include <linux/slab.h>
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static inline void *
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memchr_inv(const void *buffer, int c, size_t len)
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{
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const uint8_t byte = c; /* XXX lose */
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const char *p;
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for (p = buffer; len-- > 0; p++)
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if (*p != byte)
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return __UNCONST(p);
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return NULL;
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}
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static inline void *
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kmemdup(const void *src, size_t len, gfp_t gfp)
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{
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void *dst;
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dst = kmalloc(len, gfp);
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if (dst == NULL)
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return NULL;
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(void)memcpy(dst, src, len);
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return dst;
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}
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static inline char *
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kstrndup(const char *src, size_t maxlen, gfp_t gfp)
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{
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char *dst;
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size_t len;
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if (src == NULL)
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return NULL;
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len = strnlen(src, maxlen);
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dst = kmalloc(len + 1, gfp);
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if (dst == NULL)
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return NULL;
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(void)memcpy(dst, src, len);
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dst[len] = '\0';
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return dst;
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}
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#endif /* _LINUX_STRING_H_ */
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