index 30ad0ab386b81517128c47fbe0995d8dcf030c86..94a571345852481b89479fd6664f2fc484c103b9 100644 (file)
--- a/src/include/core/store.h
+++ b/src/include/core/store.h
SDB_FIELD_AGE, /* type: datetime */
SDB_FIELD_INTERVAL, /* type: datetime */
SDB_FIELD_BACKEND, /* type: array of strings */
+ SDB_FIELD_VALUE, /* attributes only; type: type of the value */
};
#define SDB_STORE_TYPE_TO_NAME(t) \
(((t) == SDB_HOST) ? "host" \
: ((f) == SDB_FIELD_LAST_UPDATE) ? "last-update" \
: ((f) == SDB_FIELD_AGE) ? "age" \
: ((f) == SDB_FIELD_INTERVAL) ? "interval" \
- : ((f) == SDB_FIELD_BACKEND) ? "backend" : "unknown")
+ : ((f) == SDB_FIELD_BACKEND) ? "backend" \
+ : ((f) == SDB_FIELD_VALUE) ? "value" \
+ : "unknown")
#define SDB_FIELD_TYPE(f) \
(((f) == SDB_FIELD_NAME) ? SDB_TYPE_STRING \
: ((f) == SDB_FIELD_AGE) ? SDB_TYPE_DATETIME \
: ((f) == SDB_FIELD_INTERVAL) ? SDB_TYPE_DATETIME \
: ((f) == SDB_FIELD_BACKEND) ? (SDB_TYPE_ARRAY | SDB_TYPE_STRING) \
+ : ((f) == SDB_FIELD_VALUE) ? -1 /* unknown */ \
: -1)
/*
typedef struct sdb_store_expr sdb_store_expr_t;
#define SDB_STORE_EXPR(obj) ((sdb_store_expr_t *)(obj))
+/*
+ * An expression iterator iterates over the values of an iterable expression
+ * (see sdb_store_expr_iterable).
+ */
+struct sdb_store_expr_iter;
+typedef struct sdb_store_expr_iter sdb_store_expr_iter_t;
+
/*
* Store matchers may be used to lookup hosts from the store based on their
* various attributes. Service and attribute matchers are applied to a host's
sdb_store_expr_eval(sdb_store_expr_t *expr, sdb_store_obj_t *obj,
sdb_data_t *res, sdb_store_matcher_t *filter);
+/*
+ * sdb_store_expr_iterable:
+ * Check whether an expression, evaluated in the specified context (HOST,
+ * SERVICE, METRIC) is iterable, that is, if it may evaluate to multiple
+ * values.
+ */
+bool
+sdb_store_expr_iterable(sdb_store_expr_t *expr, int context);
+
+/*
+ * sdb_store_expr_iter:
+ * Iterate over the elements of an iterable expression. sdb_store_expr_iter
+ * returns NULL if the expression is not iterable (for the specified object).
+ * See also sdb_store_expr_iterable.
+ *
+ * sdb_store_expr_iter_get_next returns NULL if there is no next element.
+ */
+sdb_store_expr_iter_t *
+sdb_store_expr_iter(sdb_store_expr_t *expr, sdb_store_obj_t *obj,
+ sdb_store_matcher_t *filter);
+void
+sdb_store_expr_iter_destroy(sdb_store_expr_iter_t *iter);
+
+bool
+sdb_store_expr_iter_has_next(sdb_store_expr_iter_t *iter);
+sdb_data_t
+sdb_store_expr_iter_get_next(sdb_store_expr_iter_t *iter);
+
/*
* sdb_store_dis_matcher:
* Creates a matcher matching the disjunction (logical OR) of two matchers.
/*
* sdb_store_any_matcher:
- * Creates a matcher iterating over objects of the specified type. It matches
- * if *any* of those objects match 'm'.
+ * Creates a matcher iterating over values of the first expression (which has
+ * to be iterable). It matches if *any* of those elements match 'm'. 'm' has
+ * to be an ary operation with the left operand unset.
*/
sdb_store_matcher_t *
-sdb_store_any_matcher(int type, sdb_store_matcher_t *m);
+sdb_store_any_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m);
/*
* sdb_store_all_matcher:
- * Creates a matcher iterating over objects of the specified type. It matches
- * if *all* of those objects match 'm'.
+ * Creates a matcher iterating over values of the first expression (which has
+ * to be iterable). It matches if *all* of those elements match 'm'. 'm' has
+ * to be an ary operation with the left operand unset.
*/
sdb_store_matcher_t *
-sdb_store_all_matcher(int type, sdb_store_matcher_t *m);
+sdb_store_all_matcher(sdb_store_expr_t *iter, sdb_store_matcher_t *m);
/*
* sdb_store_in_matcher:
sdb_store_matcher_t *
sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right);
+/*
+ * sdb_store_nin_matcher:
+ * Like sdb_store_in_matcher but matches if the left value is not included in
+ * the right value.
+ */
+sdb_store_matcher_t *
+sdb_store_nin_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right);
+
/*
* sdb_store_lt_matcher, sdb_store_le_matcher, sdb_store_eq_matcher,
* sdb_store_ge_matcher, sdb_store_gt_matcher: