Encoding & Decoding of D_FLOAT format

[Carl Inglis]

As part of a project for work, I need to be able to encode and decode
floating point numbers stored in the old VAX D_FLOAT format.

I have found the specifications for this format, however floating point
numbers are not my strong suit, and I'd rather use an existing module
or algorithm, as opposed to "rolling my own".

I've googled, but to little avail and would appreciate any pointers
which anyone can give me.

TIA,

Carl