index 308523a4476a1b861ad134e43815d7372088b036..cb7f3e4bbe545e95bf9cd4b8108dbdee52ccfceb 100644 (file)
--- a/src/include/core/store.h
+++ b/src/include/core/store.h
sdb_store_service_attr(const char *hostname, const char *service,
const char *key, const sdb_data_t *value, sdb_time_t last_update);
+/*
+ * sdb_store_get_field:
+ * Get the value of a stored object's queryable field. The caller is
+ * responsible for freeing any dynamically allocated memory possibly stored in
+ * the returned value.
+ *
+ * Note: Retrieving the backend this way is not currently supported.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_store_get_field(sdb_store_obj_t *obj, int field, sdb_data_t *res);
+
/*
* Expressions specify arithmetic expressions.
*
sdb_store_expr_t *
sdb_store_expr_create(int op, sdb_store_expr_t *left, sdb_store_expr_t *right);
+/*
+ * sdb_store_expr_fieldvalue:
+ * Creates an expression which evaluates to the value of the specified
+ * queryable field of a stored object.
+ *
+ * Returns:
+ * - an expression object on success
+ * - NULL else
+ */
+sdb_store_expr_t *
+sdb_store_expr_fieldvalue(int field);
+
/*
* sdb_store_expr_constvalue:
* Creates an expression which evaluates to the specified constant value.
/*
* sdb_store_expr_eval:
- * Evaluate an expression and stores the result in 'res'. The result's value
- * will be allocated dynamically if necessary and, thus, should be free'd by
- * the caller (e.g. using sdb_data_free_datum);
+ * Evaluate an expression for the specified stored object and stores the
+ * result in 'res'. The result's value will be allocated dynamically if
+ * necessary and, thus, should be free'd by the caller (e.g. using
+ * sdb_data_free_datum). The object may be NULL, in which case the expression
+ * needs to evaluate to a constant value.
*
* Returns:
* - 0 on success
* - a negative value else
*/
int
-sdb_store_expr_eval(sdb_store_expr_t *expr, sdb_data_t *res);
+sdb_store_expr_eval(sdb_store_expr_t *expr, sdb_store_obj_t *obj,
+ sdb_data_t *res);
/*
* Conditionals may be used to lookup hosts from the store based on a
sdb_store_matcher_t *
sdb_store_gt_matcher(sdb_store_cond_t *cond);
+/*
+ * sdb_store_parse_field_name:
+ * Parse the name of a stored object's queryable field.
+ *
+ * Returns:
+ * - the field id on success
+ * - a negative value else
+ */
+int
+sdb_store_parse_field_name(const char *name);
+
/*
* sdb_store_matcher_parse_cmp:
* Parse a simple compare expression (<obj_type>.<attr> <op> <expression>).
sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
const char *op, sdb_store_expr_t *expr);
+/*
+ * sdb_store_matcher_parse_field_cmp:
+ * Parse a simple compare expression for queryable object fields (<field> <op>
+ * <expression>).
+ *
+ * Returns:
+ * - a matcher object on success
+ * - NULL else
+ */
+sdb_store_matcher_t *
+sdb_store_matcher_parse_field_cmp(const char *name, const char *op,
+ sdb_store_expr_t *expr);
+
/*
* sdb_store_dis_matcher:
* Creates a matcher matching the disjunction (logical OR) of two matchers.