dnvlist.c revision 302408
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: stable/11/sys/contrib/libnv/dnvlist.c 285139 2015-07-04 16:33:37Z oshogbo $"); 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/dnv.h> 51#include <sys/nv.h> 52 53#include "nv_impl.h" 54 55#define DNVLIST_GET(ftype, type) \ 56ftype \ 57dnvlist_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 66DNVLIST_GET(bool, bool) 67DNVLIST_GET(uint64_t, number) 68DNVLIST_GET(const char *, string) 69DNVLIST_GET(const nvlist_t *, nvlist) 70#ifndef _KERNEL 71DNVLIST_GET(int, descriptor) 72#endif 73 74#undef DNVLIST_GET 75 76const void * 77dnvlist_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) \ 93ftype \ 94dnvlist_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 103DNVLIST_TAKE(bool, bool) 104DNVLIST_TAKE(uint64_t, number) 105DNVLIST_TAKE(char *, string) 106DNVLIST_TAKE(nvlist_t *, nvlist) 107#ifndef _KERNEL 108DNVLIST_TAKE(int, descriptor) 109#endif 110 111#undef DNVLIST_TAKE 112 113void * 114dnvlist_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} 128 129