/*
* OK, here is the fun. We want to lookup a field that is:
- * - either in the current scope, but prior to the current field.
- * - or in a parent scope (or parent of parent ...) still in a field
- * prior to the current field position within the parents.
- * A reaching through a dynamic scoping (e.g. from payload structure to
- * event header structure), the parent fields are always entirely prior
- * to the child.
+ * - either in the same dynamic scope:
+ * - either in the current scope, but prior to the current field.
+ * - or in a parent scope (or parent of parent ...) still in a field
+ * prior to the current field position within the parents.
+ * - or in a different dynamic scope:
+ * - either in a upper dynamic scope (walk down a targeted scope from
+ * the dynamic scope root)
+ * - or in a lower dynamic scope (failure)
+ * The dynamic scope roots are linked together, so we can access the
+ * parent dynamic scope from the child dynamic scope by walking up to
+ * the parent.
* If we cannot find such a field that is prior to our current path, we
* return NULL.
*
return 0;
}
-struct definition_scope *
- new_definition_scope(struct definition_scope *parent_scope,
- GQuark field_name)
+static struct definition_scope *
+ _new_definition_scope(struct definition_scope *parent_scope,
+ int scope_path_len)
{
struct definition_scope *scope = g_new(struct definition_scope, 1);
- int scope_path_len = 1;
scope->definitions = g_hash_table_new_full(g_direct_hash,
g_direct_equal, NULL,
(GDestroyNotify) definition_unref);
scope->parent_scope = parent_scope;
- if (scope->parent_scope)
- scope_path_len += scope->parent_scope->scope_path->len;
scope->scope_path = g_array_sized_new(FALSE, TRUE, sizeof(GQuark),
scope_path_len);
g_array_set_size(scope->scope_path, scope_path_len);
- if (scope->parent_scope)
- memcpy(scope->scope_path, scope->parent_scope->scope_path,
+ return scope;
+}
+
+struct definition_scope *
+ new_definition_scope(struct definition_scope *parent_scope,
+ GQuark field_name)
+{
+ struct definition_scope *scope;
+ int scope_path_len = 1;
+
+ if (parent_scope)
+ scope_path_len += parent_scope->scope_path->len;
+ scope = _new_definition_scope(parent_scope, scope_path_len);
+ if (parent_scope)
+ memcpy(scope->scope_path, parent_scope->scope_path,
sizeof(GQuark) * (scope_path_len - 1));
g_array_index(scope->scope_path, GQuark, scope_path_len - 1) =
field_name;
return scope;
}
+/*
+ * Same as new_definition_scope, but reset the scope path.
+ */
+struct definition_scope *
+ new_dynamic_definition_scope(struct definition_scope *parent_scope,
+ GQuark field_name)
+{
+ struct definition_scope *scope;
+
+ scope = _new_definition_scope(parent_scope, 1);
+ g_array_index(scope->scope_path, GQuark, 0) = field_name;
+ return scope;
+}
+
void free_definition_scope(struct definition_scope *scope)
{
g_array_free(scope->scope_path, TRUE);