sys/contrib/libnv/dnvlist.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2013 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * This software was developed by Pawel Jakub Dawidek under sponsorship from
   8  * the FreeBSD Foundation.
   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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #ifdef _KERNEL
  36
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39 #include <sys/kernel.h>
  40 #include <sys/systm.h>
  41 #include <sys/malloc.h>
  42
  43 #include <machine/stdarg.h>
  44
  45 #else
  46 #include <stdarg.h>
  47 #include <stdbool.h>
  48 #include <stdint.h>
  49 #include <stdlib.h>
  50 #endif
  51
  52 #include <sys/dnv.h>
  53 #include <sys/nv.h>
  54
  55 #include "nv_impl.h"
  56
  57 #define DNVLIST_GET(ftype, type)                                        \
  58 ftype                                                                   \
  59 dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval) \
  60 {                                                                       \
  61                                                                         \
  62         if (nvlist_exists_##type(nvl, name))                            \
  63                 return (nvlist_get_##type(nvl, name));                  \
  64         else                                                            \
  65                 return (defval);                                        \
  66 }
  67
  68 DNVLIST_GET(bool, bool)
  69 DNVLIST_GET(uint64_t, number)
  70 DNVLIST_GET(const char *, string)
  71 DNVLIST_GET(const nvlist_t *, nvlist)
  72 #ifndef _KERNEL
  73 DNVLIST_GET(int, descriptor)
  74 #endif
  75
  76 #undef  DNVLIST_GET
  77
  78 const void *
  79 dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
  80     const void *defval, size_t defsize)
  81 {
  82         const void *value;
  83
  84         if (nvlist_exists_binary(nvl, name))
  85                 value = nvlist_get_binary(nvl, name, sizep);
  86         else {
  87                 if (sizep != NULL)
  88                         *sizep = defsize;
  89                 value = defval;
  90         }
  91         return (value);
  92 }
  93
  94 #define DNVLIST_TAKE(ftype, type)                                       \
  95 ftype                                                                   \
  96 dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval)      \
  97 {                                                                       \
  98                                                                         \
  99         if (nvlist_exists_##type(nvl, name))                            \
 100                 return (nvlist_take_##type(nvl, name));                 \
 101         else                                                            \
 102                 return (defval);                                        \
 103 }
 104
 105 DNVLIST_TAKE(bool, bool)
 106 DNVLIST_TAKE(uint64_t, number)
 107 DNVLIST_TAKE(char *, string)
 108 DNVLIST_TAKE(nvlist_t *, nvlist)
 109 #ifndef _KERNEL
 110 DNVLIST_TAKE(int, descriptor)
 111 #endif
 112
 113 #undef  DNVLIST_TAKE
 114
 115 void *
 116 dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
 117     void *defval, size_t defsize)
 118 {
 119         void *value;
 120
 121         if (nvlist_exists_binary(nvl, name))
 122                 value = nvlist_take_binary(nvl, name, sizep);
 123         else {
 124                 if (sizep != NULL)
 125                         *sizep = defsize;
 126                 value = defval;
 127         }
 128         return (value);
 129 }
 130