Module access_rule 

Clause 21 codec for BACnetAccessRule, the element of an Access Rights object’s Positive_Access_Rules and Negative_Access_Rules arrays (Clause 12.34.9.1).

A rule is a bare SEQUENCE and a whole array concatenates them with no wrapper, so the decoder reads one rule at offset and returns the offset just past it, the way the Access Credential element codecs do.

The decoder checks structure only. It keeps each specifier as received, a value outside the two named ones included, and doesn’t compare a specifier with the presence of its reference; the Access Rights object judges both. A specifier wider than 32 bits is malformed.

Functions

decode_access_rule

Decode one BACnetAccessRule SEQUENCE at offset.

encode_access_rule

Encode one BACnetAccessRule SEQUENCE: the time-range specifier as context [0], the time-range reference (when present) inside opening and closing tag 1, the location specifier as context [2], the location reference (when present) inside opening and closing tag 3, and the enable flag as context [4].