1 /*-
2 * Copyright (c) 2013 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
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, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/10.3/sys/kern/subr_dnvlist.c 292973 2015-12-31 03:28:14Z ngie $");
32
33 #ifdef _KERNEL
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
40
41 #include <machine/stdarg.h>
42
43 #else
44 #include <stdarg.h>
45 #include <stdbool.h>
46 #include <stdint.h>
47 #include <stdlib.h>
48 #endif
49
50 #include <sys/nv.h>
51 #include <sys/nv_impl.h>
52
53 #include <sys/dnv.h>
54
55 #define DNVLIST_GET(ftype, type) \
56 ftype \
57 dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval) \
58 { \
59 \
60 if (nvlist_exists_##type(nvl, name)) \
61 return (nvlist_get_##type(nvl, name)); \
62 else \
63 return (defval); \
64 }
65
66 DNVLIST_GET(bool, bool)
67 DNVLIST_GET(uint64_t, number)
68 DNVLIST_GET(const char *, string)
69 DNVLIST_GET(const nvlist_t *, nvlist)
70 #ifndef _KERNEL
71 DNVLIST_GET(int, descriptor)
72 #endif
73
74 #undef DNVLIST_GET
75
76 const void *
77 dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
78 const void *defval, size_t defsize)
79 {
80 const void *value;
81
82 if (nvlist_exists_binary(nvl, name))
83 value = nvlist_get_binary(nvl, name, sizep);
84 else {
85 if (sizep != NULL)
86 *sizep = defsize;
87 value = defval;
88 }
89 return (value);
90 }
91
92 #define DNVLIST_TAKE(ftype, type) \
93 ftype \
94 dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval) \
95 { \
96 \
97 if (nvlist_exists_##type(nvl, name)) \
98 return (nvlist_take_##type(nvl, name)); \
99 else \
100 return (defval); \
101 }
102
103 DNVLIST_TAKE(bool, bool)
104 DNVLIST_TAKE(uint64_t, number)
105 DNVLIST_TAKE(char *, string)
106 DNVLIST_TAKE(nvlist_t *, nvlist)
107 #ifndef _KERNEL
108 DNVLIST_TAKE(int, descriptor)
109 #endif
110
111 #undef DNVLIST_TAKE
112
113 void *
114 dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
115 void *defval, size_t defsize)
116 {
117 void *value;
118
119 if (nvlist_exists_binary(nvl, name))
120 value = nvlist_take_binary(nvl, name, sizep);
121 else {
122 if (sizep != NULL)
123 *sizep = defsize;
124 value = defval;
125 }
126 return (value);
127 }
128
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