FS D leading zero format (probably form Direct) is an unspecified
coordinate format where all numbers are specified with both leading
and trailing zeros.
Aperture macros can get complex with arithmetical operations,
variables and variables substitution.
Current pcb-tools code just read each macro block as an independent
unit, this cannot deal with variables that get changed after used.
This patch splits the task in two: first we parse all macro content
and creates a bytecode representation of all operations. This bytecode
representation will be executed when an AD command is issues passing
the required parameters.
Parsing is heavily based on gerbv using a Shunting Yard approach to
math parsing.
Integration with rs274x.py code is not finished as I need to figure out
how to integrate the final macro primitives with the graphical primitives
already in use.
* Add support to convert between metric/impertial
* AM primitives are now properly created and can be
converted between metric/imperial.
(only Outline primitive is supported, no rendering yet)
* Modify the way we parse parameters to allow more than
one parameter in a single line as in the following example:
%FSLAX55Y55*MOIN*%
%IR0*IPPOS*OFA0.00000B0.00000*MIA0B0*SFA1.00000B1.00000*%
(this is from OrCAD 16 default output)
* Add missing deprecated parameters.
* Change API to use given FileSettings on output. This allows
us to use pcb-tools to convert between FS formats.
