Gerber support for single quadrant arcs (G74).

bugs/excellonparse.rst

@@ -0,0 +1,35 @@
+Excellon Parser
+===============
+
+List of test files and their settings
+-------------------------------------
+
+========================== ============== ========= ===================
+File                       Settings       Parsed Ok Example
+========================== ============== ========= ===================
+FlatCAM_Drilling_Test.drl  METRIC         YES       X76324 -> 76mm
+Drill_All.drl              METRIC         NO        X019708 -> 1.97mm X
+TFTadapter.drl             METRIC,TZ      YES?      X4.572 -> 4.57mm
+rfduino dip.drl_           METRIC,TZ      NO        X236220 -> 23mm X
+X-Y CONTROLLER - Drill...  METRIC         YES       X76213 -> 76mm
+ucontrllerBoard.drl        INCH,TZ        YES       X1.96572
+holes.drl                  INCH           YES       Y+019500 -> 1.95in
+BLDC2003Through.drl        INCH           YES       X+023625 -> 2.3in
+PlacaReles.drl             INCH,TZ        YES       Y-8200 -> -0.82in
+AVR_Transistor_Tester.DRL  INCH           YES       X033000 -> 3.3in
+DRL                        INCH,00.0000   YES/NO*   X004759 -> 0.47in
+========================== ============== ========= ===================
+
+(*) The units format is not recognized, thus it is parsed correctly
+as long as the project is set for inches already.
+
+Parser was:
+
+.. code-block:: python
+
+   def parse_number(self, number_str):
+     if self.zeros == "L":
+       match = self.leadingzeros_re.search(number_str)
+       return float(number_str)/(10**(len(match.group(1)) + len(match.group(2)) - 2))
+     else:  # Trailing
+       return float(number_str)/10000