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 | |