1 /* SPDX-License-Identifier: GPL-2.0 */
17 #define BOOTCONFIG_ALIGN_MASK	(BOOTCONFIG_ALIGN - 1)
20  * xbc_calc_checksum() - Calculate checksum of bootconfig
33 	while (size--)  in xbc_calc_checksum()
42 	u16 child;  member
49 /* Maximum size of boot config is 32KB - 1 */
50 #define XBC_DATA_MAX	(XBC_VALUE - 1)
65  * xbc_node_is_value() - Test the node is a value node
72 	return node->data & XBC_VALUE;  in xbc_node_is_value()
76  * xbc_node_is_key() - Test the node is a key node
87  * xbc_node_is_array() - Test the node is an arraied value node
94 	return xbc_node_is_value(node) && node->child != 0;  in xbc_node_is_array()
98  * xbc_node_is_leaf() - Test the node is a leaf key node
102  * or no child. Returns true if it is a leaf node, or false if not.
103  * Note that the leaf node can have subkey nodes in addition to the
109 		(!node->child || xbc_node_is_value(xbc_node_get_child(node)));  in xbc_node_is_leaf()
112 /* Tree-based key-value access APIs */
127  * xbc_find_value() - Find a value which matches the key
133  * Note that this can return 0-length string and store NULL in *@vnode for
134  * key-only (non-value) entry.
143  * xbc_find_node() - Find a node which matches the key
155  * xbc_node_get_subkey() - Return the first subkey node if exists
158  * Return the first subkey node of the @node. If the @node has no child
163 	struct xbc_node *child = xbc_node_get_child(node);  in xbc_node_get_subkey()  local
165 	if (child && xbc_node_is_value(child))  in xbc_node_get_subkey()
166 		return xbc_node_get_next(child);  in xbc_node_get_subkey()
168 		return child;  in xbc_node_get_subkey()
172  * xbc_array_for_each_value() - Iterate value nodes on an array
176  * Iterate array value nodes and values starts from @anode. This is expected to
186  * xbc_node_for_each_child() - Iterate child nodes
188  * @child: Iterated XBC node.
190  * Iterate child nodes of @parent. Each child nodes are stored to @child.
191  * The @child can be mixture of a value node and subkey nodes.
193 #define xbc_node_for_each_child(parent, child)				\  argument
194 	for (child = xbc_node_get_child(parent); child != NULL ;	\
195 	     child = xbc_node_get_next(child))
198  * xbc_node_for_each_subkey() - Iterate child subkey nodes
200  * @child: Iterated XBC node.
202  * Iterate subkey nodes of @parent. Each child nodes are stored to @child.
203  * The @child is only the subkey node.
205 #define xbc_node_for_each_subkey(parent, child)				\  argument
206 	for (child = xbc_node_get_subkey(parent); child != NULL ;	\
207 	     child = xbc_node_get_next(child))
210  * xbc_node_for_each_array_value() - Iterate array entries of geven key
221  * (key-only node), this does nothing. So don't use this for testing the
222  * key-value pair existence.
230  * xbc_node_for_each_key_value() - Iterate key-value pairs under a node
235  * Iterate key-value pairs under @node. Each key node and value string are
243  * xbc_for_each_key_value() - Iterate key-value pairs
247  * Iterate key-value pairs in whole XBC tree. Each key node and value string
258  * xbc_node_compose_key() - Compose full key string of the XBC node
263  * Compose the full-length key of the @node into @buf. Returns the total
264  * length of the key stored in @buf. Or returns -EINVAL if @node is NULL,
265  * and -ERANGE if the key depth is deeper than max depth.