* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/**
+ * Interface to manage the ecoli nodes.
+ *
+ * A node is a main structure of the ecoli library, used to define how
+ * to match and complete the input tokens. A node is a generic object
+ * that implements:
+ * - a parse(node, input) method: check if an input matches
+ * - a complete(node, input) method: return possible completions for
+ * a given input
+ * - some other methods to initialize, free, ...
+ *
+ * One basic example is the string node (ec_node_str). A node
+ * ec_node_str("foo") will match any token list starting with "foo",
+ * for example:
+ * - ["foo"]
+ * - ["foo", "bar", ...]
+ * But will not match:
+ * - []
+ * - ["bar", ...]
+ *
+ * A node ec_node_str("foo") will complete with "foo" if the input
+ * contains one token, with the same beginning than "foo":
+ * - [""]
+ * - ["f"]
+ * - ["fo"]
+ * - ["foo"]
+ * But it will not complete:
+ * - []
+ * - ["bar"]
+ * - ["f", ""]
+ * - ["", "f"]
+ *
+ * A node can have child nodes. For instance, a sequence node
+ * ec_node_seq(ec_node_str("foo"), ec_node_str("bar")) will match
+ * ["foo", "bar"].
+ */
+
#ifndef ECOLI_NODE_
#define ECOLI_NODE_
#include <sys/types.h>
#include <stdio.h>
+#define EC_NO_ID "no-id"
+
#define EC_NODE_ENDLIST ((void *)1)
struct ec_node;
struct ec_strvec;
struct ec_keyval;
-/* return 0 on success, else -errno. */
-typedef int (*ec_node_build_t)(struct ec_node *node);
-
-typedef struct ec_parsed *(*ec_node_parse_t)(const struct ec_node *node,
- const struct ec_strvec *strvec);
-typedef struct ec_completed *(*ec_node_complete_t)(const struct ec_node *node,
- const struct ec_strvec *strvec);
-typedef const char * (*ec_node_desc_t)(const struct ec_node *);
-typedef void (*ec_node_init_priv_t)(struct ec_node *);
-typedef void (*ec_node_free_priv_t)(struct ec_node *);
-
#define EC_NODE_TYPE_REGISTER(t) \
static void ec_node_init_##t(void); \
static void __attribute__((constructor, used)) \
TAILQ_HEAD(ec_node_type_list, ec_node_type);
+/* return 0 on success, else -errno. */
+typedef int (*ec_node_build_t)(struct ec_node *node);
+
+typedef int (*ec_node_parse_t)(const struct ec_node *node,
+ struct ec_parsed *state,
+ const struct ec_strvec *strvec);
+typedef int (*ec_node_complete_t)(const struct ec_node *node,
+ struct ec_completed *completed_state,
+ const struct ec_strvec *strvec);
+typedef size_t (*ec_node_get_max_parse_len_t)(const struct ec_node *node);
+typedef const char * (*ec_node_desc_t)(const struct ec_node *);
+typedef int (*ec_node_init_priv_t)(struct ec_node *);
+typedef void (*ec_node_free_priv_t)(struct ec_node *);
+
/**
* A structure describing a node type.
*/
struct ec_node_type {
TAILQ_ENTRY(ec_node_type) next; /**< Next in list. */
- const char *name; /**< Node type name. */
- ec_node_build_t build; /* (re)build the node, called by generic parse */
+ const char *name; /**< Node type name. */
+ ec_node_build_t build; /**< (Re)build the node */
ec_node_parse_t parse;
ec_node_complete_t complete;
+ ec_node_get_max_parse_len_t get_max_parse_len;
ec_node_desc_t desc;
size_t size;
ec_node_init_priv_t init_priv;
*/
void ec_node_type_dump(FILE *out);
-TAILQ_HEAD(ec_node_list, ec_node);
-
struct ec_node {
const struct ec_node_type *type;
char *id;
char *desc;
struct ec_keyval *attrs;
- /* XXX ensure parent and child are properly set in all nodes */
- struct ec_node *parent;
unsigned int refcnt;
-#define EC_NODE_F_BUILT 0x0001 /** set if configuration is built */
- unsigned int flags;
-
- TAILQ_ENTRY(ec_node) next;
- struct ec_node_list children;
+ struct ec_node **children; /* array of children */
+ size_t n_children; /* number of children in the array */
};
/* create a new node when the type is known, typically called from the node
struct ec_node *ec_node_clone(struct ec_node *node);
void ec_node_free(struct ec_node *node);
+size_t ec_node_get_children_count(const struct ec_node *node);
+struct ec_node *
+ec_node_get_child(const struct ec_node *node, size_t i);
+int ec_node_add_child(struct ec_node *node, struct ec_node *child);
+int ec_node_del_child(struct ec_node *node, struct ec_node *child);
+
+/**
+ * Get the max len of strvec that can be parsed by this node
+ *
+ * If there is no maximum, return SIZE_MAX.
+ */
+size_t ec_node_get_max_parse_len(const struct ec_node *node);
+
/* XXX add more accessors */
struct ec_keyval *ec_node_attrs(const struct ec_node *node);
-struct ec_node *ec_node_parent(const struct ec_node *node);
const char *ec_node_id(const struct ec_node *node);
const char *ec_node_desc(const struct ec_node *node);
void ec_node_dump(FILE *out, const struct ec_node *node);
struct ec_node *ec_node_find(struct ec_node *node, const char *id);
+/* check the type of a node */
+int ec_node_check_type(const struct ec_node *node,
+ const struct ec_node_type *type);
+
#endif