Allow files to be read from strings per #37

Adds a loads() method to the top level module which generates a GerberFile or ExcellonFile from a string

1 files changed, 14 insertions, 10 deletions

diff --git a/gerber/rs274x.py b/gerber/rs274x.py
index 1df3646..000f7a1 100644
--- a/gerber/rs274x.py
+++ b/gerber/rs274x.py
@@ -21,6 +21,7 @@
 import copy
 import json
 import re
+from cStringIO import StringIO
 
 from .gerber_statements import *
 from .primitives import *
@@ -43,6 +44,9 @@ def read(filename):
     return GerberParser().parse(filename)
 
 
+def loads(data):
+    return GerberParser().parse_raw(data)
+
 class GerberFile(CamFile):
     """ A class representing a single gerber file
 
@@ -75,7 +79,6 @@ class GerberFile(CamFile):
     def __init__(self, statements, settings, primitives, filename=None):
         super(GerberFile, self).__init__(statements, settings, primitives, filename)
 
-
     @property
     def comments(self):
         return [comment.comment for comment in self.statements
@@ -205,12 +208,14 @@ class GerberParser(object):
         self.quadrant_mode = 'multi-quadrant'
         self.step_and_repeat = (1, 1, 0, 0)
 
-
     def parse(self, filename):
-        fp = open(filename, "r")
-        data = fp.readlines()
+        with open(filename, "r") as fp:
+            data = fp.read()
+        return self.parse_raw(data, filename=None)
 
-        for stmt in self._parse(data):
+    def parse_raw(self, data, filename=None):
+        lines = [line for line in StringIO(data)]
+        for stmt in self._parse(lines):
             self.evaluate(stmt)
             self.statements.append(stmt)
 
@@ -225,10 +230,10 @@ class GerberParser(object):
         return json.dumps(stmts)
 
     def dump_str(self):
-        s = ""
+        string = ""
         for stmt in self.statements:
-            s += str(stmt) + "\n"
-        return s
+            string += str(stmt) + "\n"
+        return string
 
     def _parse(self, data):
         oldline = ''
@@ -404,7 +409,6 @@ class GerberParser(object):
         else:
             raise Exception("Invalid statement to evaluate")
 
-
     def _define_aperture(self, d, shape, modifiers):
         aperture = None
         if shape == 'C':
@@ -490,7 +494,7 @@ class GerberParser(object):
                         self.current_region = [Arc(start, end, center, self.direction, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units),]
                     else:
                         self.current_region.append(Arc(start, end, center, self.direction, self.apertures[self.aperture], level_polarity=self.level_polarity, units=self.settings.units))
-                                
+
         elif self.op == "D02":
             pass