+unsigned long int range_set_scan (const struct range_set *,
+ unsigned long int start);
+
+static inline bool range_set_is_empty (const struct range_set *);
+
+static inline const struct range_set_node *range_set_first (
+ const struct range_set *);
+static inline const struct range_set_node *range_set_next (
+ const struct range_set *, const struct range_set_node *);
+static inline const struct range_set_node *range_set_last (
+ const struct range_set *);
+static inline const struct range_set_node *range_set_prev (
+ const struct range_set *, const struct range_set_node *);
+static inline unsigned long int range_set_node_get_start (
+ const struct range_set_node *);
+static inline unsigned long int range_set_node_get_end (
+ const struct range_set_node *);
+static inline unsigned long int range_set_node_get_width (
+ const struct range_set_node *);
+\f
+/* Inline functions. */
+
+static inline struct range_set_node *range_set_node_from_bt__ (
+ const struct bt_node *);
+static inline struct range_set_node *range_set_next__ (
+ const struct range_set *, const struct range_set_node *);
+static inline struct range_set_node *range_set_first__ (
+ const struct range_set *);
+static inline struct range_set_node *range_set_prev__ (
+ const struct range_set *, const struct range_set_node *);
+static inline struct range_set_node *range_set_last__ (
+ const struct range_set *);
+
+/* Returns true if RS contains no 1-bits, false otherwise. */
+static inline bool
+range_set_is_empty (const struct range_set *rs)
+{
+ return bt_count (&rs->bt) == 0;
+}
+
+/* Returns the node representing the first contiguous region of
+ 1-bits in RS, or a null pointer if RS is empty.
+ Any call to range_set_insert, range_set_delete, or
+ range_set_allocate invalidates the returned node. */
+static inline const struct range_set_node *
+range_set_first (const struct range_set *rs)
+{
+ return range_set_first__ (rs);
+}
+
+/* If NODE is nonnull, returns the node representing the next
+ contiguous region of 1-bits in RS following NODE, or a null
+ pointer if NODE is the last region in RS.
+ If NODE is null, returns the first region in RS, as for
+ range_set_first.
+ Any call to range_set_insert, range_set_delete, or
+ range_set_allocate invalidates the returned node. */
+static inline const struct range_set_node *
+range_set_next (const struct range_set *rs, const struct range_set_node *node)
+{
+ return (node != NULL
+ ? range_set_next__ (rs, (struct range_set_node *) node)
+ : range_set_first__ (rs));
+}
+
+/* Returns the node representing the last contiguous region of
+ 1-bits in RS, or a null pointer if RS is empty.
+ Any call to range_set_insert, range_set_delete, or
+ range_set_allocate invalidates the returned node. */
+static inline const struct range_set_node *
+range_set_last (const struct range_set *rs)
+{
+ return range_set_last__ (rs);
+}
+
+/* If NODE is nonnull, returns the node representing the previous
+ contiguous region of 1-bits in RS following NODE, or a null
+ pointer if NODE is the first region in RS.
+ If NODE is null, returns the last region in RS, as for
+ range_set_last.
+ Any call to range_set_insert, range_set_delete, or
+ range_set_allocate invalidates the returned node. */
+static inline const struct range_set_node *
+range_set_prev (const struct range_set *rs, const struct range_set_node *node)
+{
+ return (node != NULL
+ ? range_set_prev__ (rs, (struct range_set_node *) node)
+ : range_set_last__ (rs));
+}
+
+/* Returns the position of the first 1-bit in NODE. */
+static inline unsigned long int
+range_set_node_get_start (const struct range_set_node *node)
+{
+ return node->start;
+}
+
+/* Returns one past the position of the last 1-bit in NODE. */
+static inline unsigned long int
+range_set_node_get_end (const struct range_set_node *node)
+{
+ return node->end;
+}
+
+/* Returns the number of contiguous 1-bits in NODE. */
+static inline unsigned long int
+range_set_node_get_width (const struct range_set_node *node)
+{
+ return node->end - node->start;
+}
+\f
+/* Internal helper functions. */
+
+/* Returns the range_set_node corresponding to the given
+ BT_NODE. Returns a null pointer if BT_NODE is null. */
+static inline struct range_set_node *
+range_set_node_from_bt__ (const struct bt_node *bt_node)
+{
+ return bt_node ? bt_data (bt_node, struct range_set_node, bt_node) : NULL;
+}
+
+/* Returns the next range_set_node in RS after NODE,
+ or a null pointer if NODE is the last node in RS. */
+static inline struct range_set_node *
+range_set_next__ (const struct range_set *rs,
+ const struct range_set_node *node)
+{
+ return range_set_node_from_bt__ (bt_next (&rs->bt, &node->bt_node));
+}
+
+/* Returns the first range_set_node in RS,
+ or a null pointer if RS is empty. */
+static inline struct range_set_node *
+range_set_first__ (const struct range_set *rs)
+{
+ return range_set_node_from_bt__ (bt_first (&rs->bt));
+}