string.h revision 1.3.4.3
1 1.3.4.2 tls /* $NetBSD: string.h,v 1.3.4.3 2017/12/03 11:37:59 jdolecek Exp $ */ 2 1.3.4.2 tls 3 1.3.4.2 tls /*- 4 1.3.4.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.3.4.2 tls * All rights reserved. 6 1.3.4.2 tls * 7 1.3.4.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.3.4.2 tls * by Taylor R. Campbell. 9 1.3.4.2 tls * 10 1.3.4.2 tls * Redistribution and use in source and binary forms, with or without 11 1.3.4.2 tls * modification, are permitted provided that the following conditions 12 1.3.4.2 tls * are met: 13 1.3.4.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.3.4.2 tls * notice, this list of conditions and the following disclaimer. 15 1.3.4.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.4.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.3.4.2 tls * documentation and/or other materials provided with the distribution. 18 1.3.4.2 tls * 19 1.3.4.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.4.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.4.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.4.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.4.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.4.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.4.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.4.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.4.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.4.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.4.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.3.4.2 tls */ 31 1.3.4.2 tls 32 1.3.4.2 tls #ifndef _LINUX_STRING_H_ 33 1.3.4.2 tls #define _LINUX_STRING_H_ 34 1.3.4.2 tls 35 1.3.4.2 tls #include <sys/types.h> 36 1.3.4.2 tls #include <sys/cdefs.h> 37 1.3.4.2 tls #include <sys/null.h> 38 1.3.4.2 tls 39 1.3.4.2 tls #include <linux/slab.h> 40 1.3.4.2 tls 41 1.3.4.2 tls static inline void * 42 1.3.4.2 tls memchr_inv(const void *buffer, int c, size_t len) 43 1.3.4.2 tls { 44 1.3.4.2 tls const uint8_t byte = c; /* XXX lose */ 45 1.3.4.2 tls const char *p; 46 1.3.4.2 tls 47 1.3.4.2 tls for (p = buffer; len-- > 0; p++) 48 1.3.4.2 tls if (*p != byte) 49 1.3.4.2 tls return __UNCONST(p); 50 1.3.4.2 tls 51 1.3.4.2 tls return NULL; 52 1.3.4.2 tls } 53 1.3.4.2 tls 54 1.3.4.2 tls static inline void * 55 1.3.4.2 tls kmemdup(const void *src, size_t len, gfp_t gfp) 56 1.3.4.2 tls { 57 1.3.4.2 tls void *dst; 58 1.3.4.2 tls 59 1.3.4.2 tls dst = kmalloc(len, gfp); 60 1.3.4.2 tls if (dst == NULL) 61 1.3.4.2 tls return NULL; 62 1.3.4.2 tls 63 1.3.4.2 tls (void)memcpy(dst, src, len); 64 1.3.4.2 tls return dst; 65 1.3.4.2 tls } 66 1.3.4.2 tls 67 1.3.4.3 jdolecek static inline char * 68 1.3.4.3 jdolecek kstrndup(const char *src, size_t maxlen, gfp_t gfp) 69 1.3.4.3 jdolecek { 70 1.3.4.3 jdolecek char *dst; 71 1.3.4.3 jdolecek size_t len; 72 1.3.4.3 jdolecek 73 1.3.4.3 jdolecek if (src == NULL) 74 1.3.4.3 jdolecek return NULL; 75 1.3.4.3 jdolecek 76 1.3.4.3 jdolecek len = strnlen(src, maxlen); 77 1.3.4.3 jdolecek dst = kmalloc(len + 1, gfp); 78 1.3.4.3 jdolecek if (dst == NULL) 79 1.3.4.3 jdolecek return NULL; 80 1.3.4.3 jdolecek 81 1.3.4.3 jdolecek (void)memcpy(dst, src, len); 82 1.3.4.3 jdolecek dst[len] = '\0'; 83 1.3.4.3 jdolecek 84 1.3.4.3 jdolecek return dst; 85 1.3.4.3 jdolecek } 86 1.3.4.3 jdolecek 87 1.3.4.2 tls #endif /* _LINUX_STRING_H_ */ 88
Indexes created Mon Sep 29 21:09:56 GMT 2025