freebsd-dev/lib/libnv/dnvlist.c
Pawel Jakub Dawidek 36da5199bb Bring in libnv library for managing name/value pairs. The following types
are currently supported:

- NV_TYPE_NULL - only name, no data;
- NV_TYPE_BOOL - boolean (true or false);
- NV_TYPE_NUMBER - 64bit unsigned integer;
- NV_TYPE_STRING - C string;
- NV_TYPE_NVLIST - nested nvlist;
- NV_TYPE_DESCRIPTOR - file descriptor;
- NV_TYPE_BINARY - binary data.

For detailed documentation and examples see nv(3) manual page.

Sponsored by:	The FreeBSD Foundation
2013-11-12 19:39:14 +00:00

253 lines
6.5 KiB
C

/*-
* 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("$FreeBSD$");
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include "nv.h"
#include "nv_impl.h"
#include "dnv.h"
#define DNVLIST_GET(ftype, type) \
ftype \
dnvlist_get_##type(const nvlist_t *nvl, const char *name, ftype defval) \
{ \
\
return (dnvlist_getf_##type(nvl, defval, "%s", name)); \
}
DNVLIST_GET(bool, bool)
DNVLIST_GET(uint64_t, number)
DNVLIST_GET(const char *, string)
DNVLIST_GET(const nvlist_t *, nvlist)
DNVLIST_GET(int, descriptor)
#undef DNVLIST_GET
const void *
dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep,
const void *defval, size_t defsize)
{
return (dnvlist_getf_binary(nvl, sizep, defval, defsize, "%s", name));
}
#define DNVLIST_GETF(ftype, type) \
ftype \
dnvlist_getf_##type(const nvlist_t *nvl, ftype defval, \
const char *namefmt, ...) \
{ \
va_list nameap; \
ftype value; \
\
va_start(nameap, namefmt); \
value = dnvlist_getv_##type(nvl, defval, namefmt, nameap); \
va_end(nameap); \
\
return (value); \
}
DNVLIST_GETF(bool, bool)
DNVLIST_GETF(uint64_t, number)
DNVLIST_GETF(const char *, string)
DNVLIST_GETF(const nvlist_t *, nvlist)
DNVLIST_GETF(int, descriptor)
#undef DNVLIST_GETF
const void *
dnvlist_getf_binary(const nvlist_t *nvl, size_t *sizep, const void *defval,
size_t defsize, const char *namefmt, ...)
{
va_list nameap;
const void *value;
va_start(nameap, namefmt);
value = dnvlist_getv_binary(nvl, sizep, defval, defsize, namefmt,
nameap);
va_end(nameap);
return (value);
}
#define DNVLIST_GETV(ftype, type) \
ftype \
dnvlist_getv_##type(const nvlist_t *nvl, ftype defval, \
const char *namefmt, va_list nameap) \
{ \
va_list cnameap; \
ftype value; \
\
va_copy(cnameap, nameap); \
if (nvlist_existsv_##type(nvl, namefmt, cnameap)) \
value = nvlist_getv_##type(nvl, namefmt, nameap); \
else \
value = defval; \
va_end(cnameap); \
return (value); \
}
DNVLIST_GETV(bool, bool)
DNVLIST_GETV(uint64_t, number)
DNVLIST_GETV(const char *, string)
DNVLIST_GETV(const nvlist_t *, nvlist)
DNVLIST_GETV(int, descriptor)
#undef DNVLIST_GETV
const void *
dnvlist_getv_binary(const nvlist_t *nvl, size_t *sizep, const void *defval,
size_t defsize, const char *namefmt, va_list nameap)
{
va_list cnameap;
const void *value;
va_copy(cnameap, nameap);
if (nvlist_existsv_binary(nvl, namefmt, cnameap)) {
value = nvlist_getv_binary(nvl, sizep, namefmt, nameap);
} else {
if (sizep != NULL)
*sizep = defsize;
value = defval;
}
va_end(cnameap);
return (value);
}
#define DNVLIST_TAKE(ftype, type) \
ftype \
dnvlist_take_##type(nvlist_t *nvl, const char *name, ftype defval) \
{ \
\
return (dnvlist_takef_##type(nvl, defval, "%s", name)); \
}
DNVLIST_TAKE(bool, bool)
DNVLIST_TAKE(uint64_t, number)
DNVLIST_TAKE(char *, string)
DNVLIST_TAKE(nvlist_t *, nvlist)
DNVLIST_TAKE(int, descriptor)
#undef DNVLIST_TAKE
void *
dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep,
void *defval, size_t defsize)
{
return (dnvlist_takef_binary(nvl, sizep, defval, defsize, "%s", name));
}
#define DNVLIST_TAKEF(ftype, type) \
ftype \
dnvlist_takef_##type(nvlist_t *nvl, ftype defval, \
const char *namefmt, ...) \
{ \
va_list nameap; \
ftype value; \
\
va_start(nameap, namefmt); \
value = dnvlist_takev_##type(nvl, defval, namefmt, nameap); \
va_end(nameap); \
\
return (value); \
}
DNVLIST_TAKEF(bool, bool)
DNVLIST_TAKEF(uint64_t, number)
DNVLIST_TAKEF(char *, string)
DNVLIST_TAKEF(nvlist_t *, nvlist)
DNVLIST_TAKEF(int, descriptor)
#undef DNVLIST_TAKEF
void *
dnvlist_takef_binary(nvlist_t *nvl, size_t *sizep, void *defval,
size_t defsize, const char *namefmt, ...)
{
va_list nameap;
void *value;
va_start(nameap, namefmt);
value = dnvlist_takev_binary(nvl, sizep, defval, defsize, namefmt,
nameap);
va_end(nameap);
return (value);
}
#define DNVLIST_TAKEV(ftype, type) \
ftype \
dnvlist_takev_##type(nvlist_t *nvl, ftype defval, const char *namefmt, \
va_list nameap) \
{ \
va_list cnameap; \
ftype value; \
\
va_copy(cnameap, nameap); \
if (nvlist_existsv_##type(nvl, namefmt, cnameap)) \
value = nvlist_takev_##type(nvl, namefmt, nameap); \
else \
value = defval; \
va_end(cnameap); \
return (value); \
}
DNVLIST_TAKEV(bool, bool)
DNVLIST_TAKEV(uint64_t, number)
DNVLIST_TAKEV(char *, string)
DNVLIST_TAKEV(nvlist_t *, nvlist)
DNVLIST_TAKEV(int, descriptor)
#undef DNVLIST_TAKEV
void *
dnvlist_takev_binary(nvlist_t *nvl, size_t *sizep, void *defval,
size_t defsize, const char *namefmt, va_list nameap)
{
va_list cnameap;
void *value;
va_copy(cnameap, nameap);
if (nvlist_existsv_binary(nvl, namefmt, cnameap)) {
value = nvlist_takev_binary(nvl, sizep, namefmt, nameap);
} else {
if (sizep != NULL)
*sizep = defsize;
value = defval;
}
va_end(cnameap);
return (value);
}