| 1 | /* $NetBSD: string.h,v 1.4 2015/02/25 14:55:57 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 | static inline char * |
| 68 | kstrndup(const char *src, size_t maxlen, gfp_t gfp) |
| 69 | { |
| 70 | char *dst; |
| 71 | size_t len; |
| 72 | |
| 73 | if (src == NULL) |
| 74 | return NULL; |
| 75 | |
| 76 | len = strnlen(src, maxlen); |
| 77 | dst = kmalloc(len + 1, gfp); |
| 78 | if (dst == NULL) |
| 79 | return NULL; |
| 80 | |
| 81 | (void)memcpy(dst, src, len); |
| 82 | dst[len] = '\0'; |
| 83 | |
| 84 | return dst; |
| 85 | } |
| 86 | |
| 87 | #endif /* _LINUX_STRING_H_ */ |
| 88 | |