/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2021 OmniOS Community Edition (OmniOSce) Association.
 */

#ifndef _COMPAT_FREEBSD_SYS_NV_H_
#define _COMPAT_FREEBSD_SYS_NV_H_

#include <assert.h>
#include <libnvpair.h>

#define NV_TYPE_NVLIST  DATA_TYPE_NVLIST
#define NV_TYPE_STRING  DATA_TYPE_STRING

static inline const char *
nvlist_next(const nvlist_t *nvl, int *type, void **cookie)
{
        nvpair_t *nvp = *cookie;

        nvp = nvlist_next_nvpair((nvlist_t *)nvl, nvp);
        if (nvp == NULL)
                return (NULL);

        *cookie = nvp;
        *type = nvpair_type(nvp);
        return (nvpair_name(nvp));
}

static inline nvlist_t *
nvlist_create(int flag)
{
        nvlist_t *nvl;

        /*
         * We only emulate this with flag == 0, which is equivalent to the
         * illumos NV_UNIQUE_NAME.
         */
        assert(flag == 0);

        if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
                return (NULL);
        return (nvl);
}

static inline bool
nvlist_exists_nvlist(const nvlist_t *nvl, const char *name)
{
        nvlist_t *snvl;

        return (nvlist_lookup_nvlist((nvlist_t *)nvl, name, &snvl) == 0);
}

static inline nvlist_t *
nvlist_get_nvlist(const nvlist_t *nvl, const char *name)
{
        nvlist_t *snvl;

        if (nvlist_lookup_nvlist((nvlist_t *)nvl, name, &snvl) == 0)
                return (snvl);
        return (NULL);
}

static inline bool
nvlist_exists_string(const nvlist_t *nvl, const char *name)
{
        char *str;

        return (nvlist_lookup_string((nvlist_t *)nvl, name, &str) == 0);
}

static inline char *
nvlist_get_string(const nvlist_t *nvl, const char *name)
{
        char *str;

        if (nvlist_lookup_string((nvlist_t *)nvl, name, &str) == 0)
                return (str);
        return (NULL);
}

#define nvlist_free_string(nvl, name) nvlist_remove_all((nvl), (name))

#endif /* _COMPAT_FREEBSD_SYS_NV_H_ */