C++ (Cpp) nvpair_pack_null Examples

Example #1

File: subr_nvlist.c Project: fengsi/freebsd

static void *
nvlist_xpack(const nvlist_t *nvl, int64_t *fdidxp, size_t *sizep)
{
	unsigned char *buf, *ptr;
	size_t left, size;
	const nvlist_t *tmpnvl;
	nvpair_t *nvp, *tmpnvp;
	void *cookie;

	NVLIST_ASSERT(nvl);

	if (nvl->nvl_error != 0) {
		ERRNO_SET(nvl->nvl_error);
		return (NULL);
	}

	size = nvlist_size(nvl);
	buf = nv_malloc(size);
	if (buf == NULL)
		return (NULL);

	ptr = buf;
	left = size;

	ptr = nvlist_pack_header(nvl, ptr, &left);

	nvp = nvlist_first_nvpair(nvl);
	while (nvp != NULL) {
		NVPAIR_ASSERT(nvp);

		nvpair_init_datasize(nvp);
		ptr = nvpair_pack_header(nvp, ptr, &left);
		if (ptr == NULL) {
			nv_free(buf);
			return (NULL);
		}
		switch (nvpair_type(nvp)) {
		case NV_TYPE_NULL:
			ptr = nvpair_pack_null(nvp, ptr, &left);
			break;
		case NV_TYPE_BOOL:
			ptr = nvpair_pack_bool(nvp, ptr, &left);
			break;
		case NV_TYPE_NUMBER:
			ptr = nvpair_pack_number(nvp, ptr, &left);
			break;
		case NV_TYPE_STRING:
			ptr = nvpair_pack_string(nvp, ptr, &left);
			break;
		case NV_TYPE_NVLIST:
			tmpnvl = nvpair_get_nvlist(nvp);
			ptr = nvlist_pack_header(tmpnvl, ptr, &left);
			if (ptr == NULL)
				goto out;
			tmpnvp = nvlist_first_nvpair(tmpnvl);
			if (tmpnvp != NULL) {
				nvl = tmpnvl;
				nvp = tmpnvp;
				continue;
			}
			ptr = nvpair_pack_nvlist_up(ptr, &left);
			break;
#ifndef _KERNEL
		case NV_TYPE_DESCRIPTOR:
			ptr = nvpair_pack_descriptor(nvp, ptr, fdidxp, &left);
			break;
#endif
		case NV_TYPE_BINARY:
			ptr = nvpair_pack_binary(nvp, ptr, &left);
			break;
		default:
			PJDLOG_ABORT("Invalid type (%d).", nvpair_type(nvp));
		}
		if (ptr == NULL) {
			nv_free(buf);
			return (NULL);
		}
		while ((nvp = nvlist_next_nvpair(nvl, nvp)) == NULL) {
			cookie = NULL;
			nvl = nvlist_get_parent(nvl, &cookie);
			if (nvl == NULL)
				goto out;
			nvp = cookie;
			ptr = nvpair_pack_nvlist_up(ptr, &left);
			if (ptr == NULL)
				goto out;
		}
	}

out:
	if (sizep != NULL)
		*sizep = size;
	return (buf);
}

Example #2

static void *
nvlist_xpack(const nvlist_t *nvl, int64_t *fdidxp, size_t *sizep)
{
	unsigned char *buf, *ptr;
	size_t left, size;
	const nvlist_t *tmpnvl;
	nvpair_t *nvp, *tmpnvp;
	void *cookie;

	NVLIST_ASSERT(nvl);

	if (nvl->nvl_error != 0) {
		ERRNO_SET(nvl->nvl_error);
		return (NULL);
	}

	size = nvlist_size(nvl);
	buf = nv_malloc(size);
	if (buf == NULL)
		return (NULL);

	ptr = buf;
	left = size;

	ptr = nvlist_pack_header(nvl, ptr, &left);

	nvp = nvlist_first_nvpair(nvl);
	while (nvp != NULL) {
		NVPAIR_ASSERT(nvp);

		nvpair_init_datasize(nvp);
		ptr = nvpair_pack_header(nvp, ptr, &left);
		if (ptr == NULL)
			goto fail;
		switch (nvpair_type(nvp)) {
		case NV_TYPE_NULL:
			ptr = nvpair_pack_null(nvp, ptr, &left);
			break;
		case NV_TYPE_BOOL:
			ptr = nvpair_pack_bool(nvp, ptr, &left);
			break;
		case NV_TYPE_NUMBER:
			ptr = nvpair_pack_number(nvp, ptr, &left);
			break;
		case NV_TYPE_STRING:
			ptr = nvpair_pack_string(nvp, ptr, &left);
			break;
		case NV_TYPE_NVLIST:
			tmpnvl = nvpair_get_nvlist(nvp);
			ptr = nvlist_pack_header(tmpnvl, ptr, &left);
			if (ptr == NULL)
				goto fail;
			tmpnvp = nvlist_first_nvpair(tmpnvl);
			if (tmpnvp != NULL) {
				nvl = tmpnvl;
				nvp = tmpnvp;
				continue;
			}
			ptr = nvpair_pack_nvlist_up(ptr, &left);
			break;
#ifndef _KERNEL
		case NV_TYPE_DESCRIPTOR:
			ptr = nvpair_pack_descriptor(nvp, ptr, fdidxp, &left);
			break;
		case NV_TYPE_DESCRIPTOR_ARRAY:
			ptr = nvpair_pack_descriptor_array(nvp, ptr, fdidxp,
			    &left);
			break;
#endif
		case NV_TYPE_BINARY:
			ptr = nvpair_pack_binary(nvp, ptr, &left);
			break;
		case NV_TYPE_BOOL_ARRAY:
			ptr = nvpair_pack_bool_array(nvp, ptr, &left);
			break;
		case NV_TYPE_NUMBER_ARRAY:
			ptr = nvpair_pack_number_array(nvp, ptr, &left);
			break;
		case NV_TYPE_STRING_ARRAY:
			ptr = nvpair_pack_string_array(nvp, ptr, &left);
			break;
		case NV_TYPE_NVLIST_ARRAY:
		    {
			const nvlist_t * const * value;
			size_t nitems;
			unsigned int ii;

			tmpnvl = NULL;
			value = nvpair_get_nvlist_array(nvp, &nitems);
			for (ii = 0; ii < nitems; ii++) {
				ptr = nvlist_pack_header(value[ii], ptr, &left);
				if (ptr == NULL)
					goto out;
				tmpnvp = nvlist_first_nvpair(value[ii]);
				if (tmpnvp != NULL) {
					tmpnvl = value[ii];
					break;
				}
				ptr = nvpair_pack_nvlist_array_next(ptr, &left);
				if (ptr == NULL)
					goto out;
			}
			if (tmpnvl != NULL) {
				nvl = tmpnvl;
				nvp = tmpnvp;
				continue;
			}
			break;
		    }
		default:
			PJDLOG_ABORT("Invalid type (%d).", nvpair_type(nvp));
		}
		if (ptr == NULL)
			goto fail;
		while ((nvp = nvlist_next_nvpair(nvl, nvp)) == NULL) {
			do {
				cookie = NULL;
				if (nvlist_in_array(nvl)) {
					ptr = nvpair_pack_nvlist_array_next(ptr,
					    &left);
					if (ptr == NULL)
						goto fail;
				}
				nvl = nvlist_get_pararr(nvl, &cookie);
				if (nvl == NULL)
					goto out;
				if (nvlist_in_array(nvl) && cookie == NULL) {
					nvp = nvlist_first_nvpair(nvl);
					ptr = nvlist_pack_header(nvl, ptr,
					    &left);
					if (ptr == NULL)
						goto fail;
				} else if (nvpair_type((nvpair_t *)cookie) !=
				    NV_TYPE_NVLIST_ARRAY) {
					ptr = nvpair_pack_nvlist_up(ptr, &left);
					if (ptr == NULL)
						goto fail;
					nvp = cookie;
				} else {
					nvp = cookie;
				}
			} while (nvp == NULL);
			if (nvlist_in_array(nvl) && cookie == NULL)
				break;
		}
	}

out:
	if (sizep != NULL)
		*sizep = size;
	return (buf);
fail:
	nv_free(buf);
	return (NULL);
}