1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/string.h 363407 2020-07-21 23:38:05Z wulf $
30 */
31#ifndef	_LINUX_STRING_H_
32#define	_LINUX_STRING_H_
33
34#include <sys/ctype.h>
35
36#include <linux/types.h>
37#include <linux/gfp.h>
38#include <linux/slab.h>
39#include <linux/uaccess.h>
40#include <linux/err.h>
41
42#include <sys/libkern.h>
43
44#define	strnicmp(...) strncasecmp(__VA_ARGS__)
45
46static inline int
47match_string(const char *const *table, int n, const char *key)
48{
49	int i;
50
51	for (i = 0; i != n && table[i] != NULL; i++) {
52		if (strcmp(table[i], key) == 0)
53			return (i);
54	}
55	return (-EINVAL);
56}
57
58static inline void *
59memdup_user(const void *ptr, size_t len)
60{
61	void *retval;
62	int error;
63
64	retval = malloc(len, M_KMALLOC, M_WAITOK);
65	error = linux_copyin(ptr, retval, len);
66	if (error != 0) {
67		free(retval, M_KMALLOC);
68		return (ERR_PTR(error));
69	}
70	return (retval);
71}
72
73static inline void *
74memdup_user_nul(const void *ptr, size_t len)
75{
76	char *retval;
77	int error;
78
79	retval = malloc(len + 1, M_KMALLOC, M_WAITOK);
80	error = linux_copyin(ptr, retval, len);
81	if (error != 0) {
82		free(retval, M_KMALLOC);
83		return (ERR_PTR(error));
84	}
85	retval[len] = '\0';
86	return (retval);
87}
88
89static inline void *
90kmemdup(const void *src, size_t len, gfp_t gfp)
91{
92	void *dst;
93
94	dst = kmalloc(len, gfp);
95	if (dst != NULL)
96		memcpy(dst, src, len);
97	return (dst);
98}
99
100static inline char *
101kstrdup(const char *string, gfp_t gfp)
102{
103	char *retval;
104	size_t len;
105
106	if (string == NULL)
107		return (NULL);
108	len = strlen(string) + 1;
109	retval = kmalloc(len, gfp);
110	if (retval != NULL)
111		memcpy(retval, string, len);
112	return (retval);
113}
114
115static inline char *
116kstrndup(const char *string, size_t len, gfp_t gfp)
117{
118	char *retval;
119
120	if (string == NULL)
121		return (NULL);
122	retval = kmalloc(len + 1, gfp);
123	if (retval != NULL)
124		strncpy(retval, string, len);
125	return (retval);
126}
127
128static inline const char *
129kstrdup_const(const char *src, gfp_t gfp)
130{
131	return (kmemdup(src, strlen(src) + 1, gfp));
132}
133
134static inline char *
135skip_spaces(const char *str)
136{
137	while (isspace(*str))
138		++str;
139	return (__DECONST(char *, str));
140}
141
142static inline void *
143memchr_inv(const void *start, int c, size_t length)
144{
145	const u8 *ptr;
146	const u8 *end;
147	u8 ch;
148
149	ch = c;
150	ptr = start;
151	end = ptr + length;
152
153	while (ptr != end) {
154		if (*ptr != ch)
155			return (__DECONST(void *, ptr));
156		ptr++;
157	}
158	return (NULL);
159}
160
161#endif					/* _LINUX_STRING_H_ */
162