From 597427d785d6f44348fe15631f2c184504195fb0 Mon Sep 17 00:00:00 2001
From: Hamilton Kibbe <hamilton.kibbe@gmail.com>
Date: Mon, 6 Oct 2014 08:33:53 -0400
Subject: add excellon statements

---
 gerber/excellon.py | 128 +++++++++--------------------------------------------
 1 file changed, 20 insertions(+), 108 deletions(-)

(limited to 'gerber/excellon.py')

diff --git a/gerber/excellon.py b/gerber/excellon.py
index 7c7d0c6..6ae182b 100755
--- a/gerber/excellon.py
+++ b/gerber/excellon.py
@@ -22,6 +22,7 @@ Excellon module
 This module provides Excellon file classes and parsing utilities
 """
 import re
+from .excellon_statements import *
 from .utils import parse_gerber_value
 from .cnc import CncFile, FileSettings
 
@@ -74,108 +75,6 @@ class ExcellonFile(CncFile):
         ctx.dump(filename)
 
 
-class ExcellonTool(object):
-    """ Excellon Tool class
-
-    Parameters
-    ----------
-    settings : FileSettings (dict-like)
-        File-wide settings.
-
-    kwargs : dict-like
-        Tool settings from the excellon statement. Valid keys are:
-            diameter : Tool diameter [expressed in file units]
-            rpm : Tool RPM
-            feed_rate : Z-axis tool feed rate
-            retract_rate : Z-axis tool retraction rate
-            max_hit_count : Number of hits allowed before a tool change
-            depth_offset : Offset of tool depth from tip of tool.
-
-    Attributes
-    ----------
-    number : integer
-        Tool number from the excellon file
-
-    diameter : float
-        Tool diameter in file units
-
-    rpm : float
-        Tool RPM
-
-    feed_rate : float
-        Tool Z-axis feed rate.
-
-    retract_rate : float
-        Tool Z-axis retract rate
-
-    depth_offset : float
-        Offset of depth measurement from tip of tool
-
-    max_hit_count : integer
-        Maximum number of tool hits allowed before a tool change
-
-    hit_count : integer
-        Number of tool hits in excellon file.
-    """
-
-    @classmethod
-    def from_line(cls, line, settings):
-        """ Create a Tool from an excellon gile tool definition line.
-
-        Parameters
-        ----------
-        line : string
-            Tool definition line from an excellon file.
-
-        settings : FileSettings (dict-like)
-            Excellon file-wide settings
-
-        Returns
-        -------
-        tool : Tool
-            An ExcellonTool representing the tool defined in `line`
-        """
-        commands = re.split('([BCFHSTZ])', line)[1:]
-        commands = [(command, value) for command, value in pairwise(commands)]
-        args = {}
-        format = settings['format']
-        zero_suppression = settings['zero_suppression']
-        for cmd, val in commands:
-            if cmd == 'B':
-                args['retract_rate'] = parse_gerber_value(val, format, zero_suppression)
-            elif cmd == 'C':
-                args['diameter'] = parse_gerber_value(val, format, zero_suppression)
-            elif cmd == 'F':
-                args['feed_rate'] = parse_gerber_value(val, format, zero_suppression)
-            elif cmd == 'H':
-                args['max_hit_count'] = parse_gerber_value(val, format, zero_suppression)
-            elif cmd == 'S':
-                args['rpm'] = 1000 * parse_gerber_value(val, format, zero_suppression)
-            elif cmd == 'T':
-                args['number'] = int(val)
-            elif cmd == 'Z':
-                args['depth_offset'] = parse_gerber_value(val, format, zero_suppression)
-        return cls(settings, **args)
-
-    def __init__(self, settings, **kwargs):
-        self.number = kwargs.get('number')
-        self.feed_rate = kwargs.get('feed_rate')
-        self.retract_rate = kwargs.get('retract_rate')
-        self.rpm = kwargs.get('rpm')
-        self.diameter = kwargs.get('diameter')
-        self.max_hit_count = kwargs.get('max_hit_count')
-        self.depth_offset = kwargs.get('depth_offset')
-        self.units = settings.get('units', 'inch')
-        self.hit_count = 0
-
-    def _hit(self):
-        self.hit_count += 1
-
-    def __repr__(self):
-        unit = 'in.' if self.units == 'inch' else 'mm'
-        return '<ExcellonTool %d: %0.3f%s dia.>' % (self.number, self.diameter, unit)
-
-
 class ExcellonParser(object):
     """ Excellon File Parser
     """
@@ -186,6 +85,7 @@ class ExcellonParser(object):
         self.zero_suppression = 'trailing'
         self.format = (2, 5)
         self.state = 'INIT'
+        self.statements = []
         self.tools = {}
         self.hits = []
         self.active_tool = None
@@ -206,15 +106,23 @@ class ExcellonParser(object):
 
     def _parse(self, line):
         if 'M48' in line:
+            self.statements.append(HeaderBeginStmt())
             self.state = 'HEADER'
 
-        if 'G00' in line:
-            self.state = 'ROUT'
+        elif line[0] == '%':
+            self.statements.append(RewindStopStmt())
+            if self.state == 'HEADER':
+                self.state = 'DRILL'
 
-        if 'G05' in line:
-            self.state = 'DRILL'
+        elif 'M95' in line:
+            self.statements.append(HeaderEndStmt())
+            if self.state == 'HEADER':
+                self.state = 'DRILL'
+
+        elif 'G00' in line:
+            self.state = 'ROUT'
 
-        elif line[0] == '%' and self.state == 'HEADER':
+        elif 'G05' in line:
             self.state = 'DRILL'
 
         if 'INCH' in line or line.strip() == 'M72':
@@ -279,11 +187,15 @@ class ExcellonParser(object):
                             notation=self.notation)
 
 
-
 def pairwise(iterator):
+    """ Iterate over list taking two elements at a time.
+
+    e.g. [1, 2, 3, 4, 5, 6] ==> [(1, 2), (3, 4), (5, 6)]
+    """
     itr = iter(iterator)
     while True:
         yield tuple([itr.next() for i in range(2)])
+        
 
 if __name__ == '__main__':
     p = parser()
-- 
cgit