pub fn unit_mm(data: &[u8], toc: &[Entry]) -> f64Expand description
Millimetres per length unit of the file (1 when the file names none or
one not known): the unit’s name follows Offset in the names
(string_xar) of the UnitSystemDef section – mm, in, …; other
systems give the metres per unit in double_xar[0].