0bb5e6ef80
Those functions are problematic, because there is no way to report memory allocation problems without complicating the API, so we can either abort or potentially return invalid results. None of which is acceptable. In most cases the caller knows the size of the name, so he can allocate buffer on the stack and use snprintf(3) to prepare the name. After some discussion the conclusion is to removed those functions, which also simplifies the API. Discussed with: pjd, rstone Approved by: pjd (mentor)
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/*-
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* Copyright (c) 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef _KERNEL
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <machine/stdarg.h>
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#else
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#endif
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#include <sys/nv.h>
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#include <sys/nv_impl.h>
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#include <sys/dnv.h>
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#define DNVLIST_GET(ftype, type) \
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ftype \
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dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval) \
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{ \
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\
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if (nvlist_exists_##type(nvl, name)) \
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return (nvlist_get_##type(nvl, name)); \
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else \
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return (defval); \
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}
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DNVLIST_GET(bool, bool)
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DNVLIST_GET(uint64_t, number)
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DNVLIST_GET(const char *, string)
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DNVLIST_GET(const nvlist_t *, nvlist)
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#ifndef _KERNEL
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DNVLIST_GET(int, descriptor)
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#endif
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#undef DNVLIST_GET
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const void *
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dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
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const void *defval, size_t defsize)
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{
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const void *value;
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if (nvlist_exists_binary(nvl, name))
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value = nvlist_get_binary(nvl, name, sizep);
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else {
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if (sizep != NULL)
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*sizep = defsize;
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value = defval;
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}
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return (value);
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}
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#define DNVLIST_TAKE(ftype, type) \
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ftype \
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dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval) \
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{ \
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\
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if (nvlist_exists_##type(nvl, name)) \
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return (nvlist_take_##type(nvl, name)); \
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else \
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return (defval); \
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}
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DNVLIST_TAKE(bool, bool)
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DNVLIST_TAKE(uint64_t, number)
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DNVLIST_TAKE(char *, string)
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DNVLIST_TAKE(nvlist_t *, nvlist)
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#ifndef _KERNEL
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DNVLIST_TAKE(int, descriptor)
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#endif
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#undef DNVLIST_TAKE
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void *
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dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
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void *defval, size_t defsize)
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{
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void *value;
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if (nvlist_exists_binary(nvl, name))
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value = nvlist_take_binary(nvl, name, sizep);
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else {
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if (sizep != NULL)
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*sizep = defsize;
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value = defval;
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}
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return (value);
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}
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