dnvlist.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2013 The FreeBSD Foundation
    5  *
    6  * This software was developed by Pawel Jakub Dawidek under sponsorship from
    7  * the FreeBSD Foundation.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following 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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #ifdef _KERNEL
   35 
   36 #include <sys/types.h>
   37 #include <sys/param.h>
   38 #include <sys/kernel.h>
   39 #include <sys/systm.h>
   40 #include <sys/malloc.h>
   41 
   42 #include <machine/stdarg.h>
   43 
   44 #else
   45 #include <stdarg.h>
   46 #include <stdbool.h>
   47 #include <stdint.h>
   48 #include <stdlib.h>
   49 #endif
   50 
   51 #include <sys/dnv.h>
   52 #include <sys/nv.h>
   53 
   54 #include "nv_impl.h"
   55 
   56 #define DNVLIST_GET(ftype, type)                                        \
   57 ftype                                                                   \
   58 dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval) \
   59 {                                                                       \
   60                                                                         \
   61         if (nvlist_exists_##type(nvl, name))                            \
   62                 return (nvlist_get_##type(nvl, name));                  \
   63         else                                                            \
   64                 return (defval);                                        \
   65 }
   66 
   67 DNVLIST_GET(bool, bool)
   68 DNVLIST_GET(uint64_t, number)
   69 DNVLIST_GET(const char *, string)
   70 DNVLIST_GET(const nvlist_t *, nvlist)
   71 #ifndef _KERNEL
   72 DNVLIST_GET(int, descriptor)
   73 #endif
   74 
   75 #undef  DNVLIST_GET
   76 
   77 const void *
   78 dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
   79     const void *defval, size_t defsize)
   80 {
   81         const void *value;
   82 
   83         if (nvlist_exists_binary(nvl, name))
   84                 value = nvlist_get_binary(nvl, name, sizep);
   85         else {
   86                 if (sizep != NULL)
   87                         *sizep = defsize;
   88                 value = defval;
   89         }
   90         return (value);
   91 }
   92 
   93 #define DNVLIST_TAKE(ftype, type)                                       \
   94 ftype                                                                   \
   95 dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval)      \
   96 {                                                                       \
   97                                                                         \
   98         if (nvlist_exists_##type(nvl, name))                            \
   99                 return (nvlist_take_##type(nvl, name));                 \
  100         else                                                            \
  101                 return (defval);                                        \
  102 }
  103 
  104 DNVLIST_TAKE(bool, bool)
  105 DNVLIST_TAKE(uint64_t, number)
  106 DNVLIST_TAKE(char *, string)
  107 DNVLIST_TAKE(nvlist_t *, nvlist)
  108 #ifndef _KERNEL
  109 DNVLIST_TAKE(int, descriptor)
  110 #endif
  111 
  112 #undef  DNVLIST_TAKE
  113 
  114 void *
  115 dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
  116     void *defval, size_t defsize)
  117 {
  118         void *value;
  119 
  120         if (nvlist_exists_binary(nvl, name))
  121                 value = nvlist_take_binary(nvl, name, sizep);
  122         else {
  123                 if (sizep != NULL)
  124                         *sizep = defsize;
  125                 value = defval;
  126         }
  127         return (value);
  128 }
  129

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FreeBSD/Linux Kernel Cross Reference sys/contrib/libnv/dnvlist.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/libnv/dnvlist.c