xdroom
(xdroom entity)
The xdroom function returns the free space size in bytes available for extended entity data (xdata) to attach to the specified entity.
Arguments
entity specifies the entity name.
Return Value
The return value is an integer. In case of error nil is returned.
: (xdroom (entlast))
16383
The function returns 16383 if the last entity has no extended entity data.