text: /*-
   * Copyright (c) 2013 The FreeBSD Foundation
   * All rights reserved.
   *
   * This software was developed by Pawel Jakub Dawidek under sponsorship from
   * the FreeBSD Foundation.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: head/sys/contrib/libnv/dnvlist.c 285139 2015-07-04 16:33:37Z oshogbo $");
  
  #ifdef _KERNEL
  
  #include <sys/types.h>
  #include <sys/param.h>
  #include <sys/kernel.h>
  #include <sys/systm.h>
  #include <sys/malloc.h>
  
  #include <machine/stdarg.h>
  
  #else
  #include <stdarg.h>
  #include <stdbool.h>
  #include <stdint.h>
  #include <stdlib.h>
  #endif
  
  #include <sys/dnv.h>
  #include <sys/nv.h>
  
  #include "nv_impl.h"
  
  #define	DNVLIST_GET(ftype, type)					\
  ftype									\
  dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval)	\
  {									\
  									\
  	if (nvlist_exists_##type(nvl, name))				\
  		return (nvlist_get_##type(nvl, name));			\
  	else								\
  		return (defval);					\
  }
  
  DNVLIST_GET(bool, bool)
  DNVLIST_GET(uint64_t, number)
  DNVLIST_GET(const char *, string)
  DNVLIST_GET(const nvlist_t *, nvlist)
  #ifndef _KERNEL
  DNVLIST_GET(int, descriptor)
  #endif
  
  #undef	DNVLIST_GET
  
  const void *
  dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
      const void *defval, size_t defsize)
  {
  	const void *value;
  
  	if (nvlist_exists_binary(nvl, name))
  		value = nvlist_get_binary(nvl, name, sizep);
  	else {
  		if (sizep != NULL)
  			*sizep = defsize;
  		value = defval;
  	}
  	return (value);
  }
  
  #define	DNVLIST_TAKE(ftype, type)					\
  ftype									\
  dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval)	\
  {									\
  									\
  	if (nvlist_exists_##type(nvl, name))				\
  		return (nvlist_take_##type(nvl, name));			\
  	else								\
  		return (defval);					\
  }
  
  DNVLIST_TAKE(bool, bool)
  DNVLIST_TAKE(uint64_t, number)
  DNVLIST_TAKE(char *, string)
  DNVLIST_TAKE(nvlist_t *, nvlist)
  #ifndef _KERNEL
  DNVLIST_TAKE(int, descriptor)
  #endif
  
  #undef	DNVLIST_TAKE
  
  void *
  dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
      void *defval, size_t defsize)
  {
  	void *value;
  
  	if (nvlist_exists_binary(nvl, name))
  		value = nvlist_take_binary(nvl, name, sizep);
  	else {
  		if (sizep != NULL)
  			*sizep = defsize;
  		value = defval;
  	}
  	return (value);
  }
  
  