Added excellon support and refactored project

1 files changed, 305 insertions, 0 deletions

diff --git a/gerber/gerber.py b/gerber/gerber.py
new file mode 100644
index 0000000..31d9b82
--- /dev/null
+++ b/gerber/gerber.py
@@ -0,0 +1,305 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
+# Modified from parser.py by Paulo Henrique Silva <ph.silva@gmail.com>
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import re
+import json
+from .statements import *
+
+
+
+
+class GerberFile(object):
+    """ A class representing a single gerber file
+    
+    The GerberFile class represents a single gerber file. 
+        
+    Parameters
+    ----------
+    filename : string
+        Parameter.
+        
+    zero_suppression : string
+        Zero-suppression mode. May be either 'leading' or 'trailing'
+
+    notation : string
+        Notation mode. May be either 'absolute' or 'incremental'
+        
+    format : tuple (int, int)
+        Gerber precision format expressed as a tuple containing: 
+        (number of integer-part digits, number of decimal-part digits)
+
+    Attributes
+    ----------
+    comments: list of strings
+        List of comments contained in the gerber file.
+
+    units : string
+        either 'inch' or 'metric'.
+        
+    size : tuple, (<float>, <float>)
+        Size in [self.units] of the layer described by the gerber file.
+
+    bounds: tuple, ((<float>, <float>), (<float>, <float>))
+        boundaries of the layer described by the gerber file.
+        `bounds` is stored as ((min x, max x), (min y, max y))
+
+    """
+    
+    @classmethod
+    def read(cls, filename):
+        """ Read data from filename and return a GerberFile
+        """
+        return GerberParser().parse(filename)
+    
+    def __init__(self, statements, settings, filename=None):
+        self.filename = filename
+        self.statements = statements
+        self.settings = settings
+        
+    @property
+    def comments(self):
+        return [comment.comment for comment in self.statements
+                if isinstance(comment, CommentStmt)]
+    
+    @property
+    def units(self):
+        return self.settings['units']
+    
+    @property
+    def size(self):
+        xbounds, ybounds = self.bounds
+        return (xbounds[1] - xbounds[0], ybounds[1] - ybounds[0])
+    
+    @property
+    def bounds(self):
+        xbounds = [0.0, 0.0]
+        ybounds = [0.0, 0.0]
+        for stmt in [stmt for stmt in self.statements if isinstance(stmt, CoordStmt)]:
+            if stmt.x is not None and stmt.x < xbounds[0]:
+                xbounds[0] = stmt.x
+            if stmt.x is not None and stmt.x > xbounds[1]:
+                xbounds[1] = stmt.x
+            if stmt.i is not None and stmt.i < xbounds[0]:
+                xbounds[0] = stmt.i
+            if stmt.i is not None and stmt.i > xbounds[1]:
+                xbounds[1] = stmt.i
+            if stmt.y is not None and stmt.y < ybounds[0]:
+                ybounds[0] = stmt.y
+            if stmt.y is not None and stmt.y > ybounds[1]:
+                ybounds[1] = stmt.y
+            if stmt.j is not None and stmt.j < ybounds[0]:
+                ybounds[0] = stmt.j
+            if stmt.j is not None and stmt.j > ybounds[1]:
+                ybounds[1] = stmt.j
+                
+        return (xbounds, ybounds) 
+    
+    def write(self, filename):
+        """ Write data out to a gerber file
+        """
+        with open(filename, 'w') as f:
+            for statement in self.statements:
+                f.write(statement.to_gerber())
+
+    def render(self, filename, ctx):
+        """ Generate image of layer.
+        """
+        ctx.set_bounds(self.bounds)
+        for statement in self.statements:
+            ctx.evaluate(statement)
+        ctx.dump(filename)
+        
+        
+
+class GerberParser(object):
+    """ GerberParser
+    """
+    NUMBER = r"[\+-]?\d+"
+    DECIMAL = r"[\+-]?\d+([.]?\d+)?"
+    STRING = r"[a-zA-Z0-9_+\-/!?<>”’(){}.\|&@# :]+"
+    NAME = "[a-zA-Z_$][a-zA-Z_$0-9]+"
+    FUNCTION = r"G\d{2}"
+
+    COORD_OP = r"D[0]?[123]"
+
+    FS = r"(?P<param>FS)(?P<zero>(L|T))?(?P<notation>(A|I))X(?P<x>[0-7][0-7])Y(?P<y>[0-7][0-7])"
+    MO = r"(?P<param>MO)(?P<mo>(MM|IN))"
+    IP = r"(?P<param>IP)(?P<ip>(POS|NEG))"
+    LP = r"(?P<param>LP)(?P<lp>(D|C))"
+    AD_CIRCLE = r"(?P<param>AD)D(?P<d>\d+)(?P<shape>C)[,](?P<modifiers>[^,]*)"
+    AD_RECT = r"(?P<param>AD)D(?P<d>\d+)(?P<shape>R)[,](?P<modifiers>[^,]*)"
+    AD_OBROUND = r"(?P<param>AD)D(?P<d>\d+)(?P<shape>O)[,](?P<modifiers>[^,]*)"
+    AD_POLY = r"(?P<param>AD)D(?P<d>\d+)(?P<shape>P)[,](?P<modifiers>[^,]*)"
+    AD_MACRO = r"(?P<param>AD)D(?P<d>\d+)+(?P<shape>{name})[,](?P<modifiers>[^,]*)".format(name=NAME)
+    AM = r"(?P<param>AM)(?P<name>{name})\*(?P<macro>.*)".format(name=NAME)
+
+    # begin deprecated
+    OF = r"(?P<param>OF)(A(?P<a>{decimal}))?(B(?P<b>{decimal}))?".format(decimal=DECIMAL)
+    IN = r"(?P<param>IN)(?P<name>.*)"
+    LN = r"(?P<param>LN)(?P<name>.*)"
+    # end deprecated
+
+    PARAMS = (FS, MO, IP, LP, AD_CIRCLE, AD_RECT, AD_OBROUND, AD_MACRO, AD_POLY, AM, OF, IN, LN)
+    PARAM_STMT = [re.compile(r"%{0}\*%".format(p)) for p in PARAMS]
+
+    COORD_STMT = re.compile((
+        r"(?P<function>{function})?"
+        r"(X(?P<x>{number}))?(Y(?P<y>{number}))?"
+        r"(I(?P<i>{number}))?(J(?P<j>{number}))?"
+        r"(?P<op>{op})?\*".format(number=NUMBER, function=FUNCTION, op=COORD_OP)))
+
+    APERTURE_STMT = re.compile(r"(G54)?D(?P<d>\d+)\*")
+
+    COMMENT_STMT = re.compile(r"G04(?P<comment>[^*]*)(\*)?")
+
+    EOF_STMT = re.compile(r"(?P<eof>M02)\*")
+
+    def __init__(self):
+        self.settings = {}
+        self.statements = []
+
+    def parse(self, filename):
+        fp = open(filename, "r")
+        data = fp.readlines()
+
+        for stmt in self._parse(data):
+            self.statements.append(stmt)
+                
+        return GerberFile(self.statements, self.settings, filename)
+
+    def dump_json(self):
+        stmts = {"statements": [stmt.__dict__ for stmt in self.statements]}
+        return json.dumps(stmts)
+
+    def dump_str(self):
+        s = ""
+        for stmt in self.statements:
+            s += str(stmt) + "\n"
+        return s
+
+    def _parse(self, data):
+        oldline = ''
+
+        for i, line in enumerate(data):
+            line = oldline + line.strip()
+        
+            # skip empty lines
+            if not len(line):
+                continue
+
+            # deal with multi-line parameters
+            if line.startswith("%") and not line.endswith("%"):
+                oldline = line
+                continue
+
+            did_something = True # make sure we do at least one loop
+            while did_something and len(line) > 0:
+                did_something = False
+                
+                # coord
+                (coord, r) = self._match_one(self.COORD_STMT, line)
+                if coord:
+                    yield CoordStmt.from_dict(coord, self.settings)
+                    line = r
+                    did_something = True
+                    continue
+
+                # aperture selection
+                (aperture, r) = self._match_one(self.APERTURE_STMT, line)
+                if aperture:
+                    yield ApertureStmt(**aperture)
+                    
+                    did_something = True
+                    line = r
+                    continue
+
+                # comment
+                (comment, r) = self._match_one(self.COMMENT_STMT, line)
+                if comment:
+                    yield CommentStmt(comment["comment"])
+                    did_something = True
+                    line = r
+                    continue
+
+                # parameter
+                (param, r) = self._match_one_from_many(self.PARAM_STMT, line)
+                if param:
+                    if param["param"] == "FS":
+                        stmt =  FSParamStmt.from_dict(param)
+                        self.settings = {'zero_suppression': stmt.zero_suppression,
+                                         'format': stmt.format,
+                                         'notation': stmt.notation}
+                        yield stmt
+                    elif param["param"] == "MO":
+                        stmt = MOParamStmt.from_dict(param)
+                        self.settings['units'] = stmt.mode
+                        yield stmt
+                    elif param["param"] == "IP":
+                        yield IPParamStmt.from_dict(param)
+                    elif param["param"] == "LP":
+                        yield LPParamStmt.from_dict(param)
+                    elif param["param"] == "AD":
+                        yield ADParamStmt.from_dict(param)
+                    elif param["param"] == "AM":
+                        yield AMParamStmt.from_dict(param)
+                    elif param["param"] == "OF":
+                        yield OFParamStmt.from_dict(param)
+                    elif param["param"] == "IN":
+                        yield INParamStmt.from_dict(param)
+                    elif param["param"] == "LN":
+                        yield LNParamStmtfrom_dict(param)
+                    else:
+                        yield UnknownStmt(line)
+                    did_something = True
+                    line = r
+                    continue
+
+                # eof
+                (eof, r) = self._match_one(self.EOF_STMT, line)
+                if eof:
+                    yield EofStmt()
+                    did_something = True
+                    line = r
+                    continue
+                
+                if False:
+                    print self.COORD_STMT.pattern
+                    print self.APERTURE_STMT.pattern
+                    print self.COMMENT_STMT.pattern
+                    print self.EOF_STMT.pattern
+                    for i in self.PARAM_STMT:
+                        print i.pattern
+
+                if line.find('*') > 0:
+                    yield UnknownStmt(line)
+            oldline = line
+
+    def _match_one(self, expr, data):
+        match = expr.match(data)
+        if match is None:
+            return ({}, None)
+        else:
+            return (match.groupdict(), data[match.end(0):])
+
+    def _match_one_from_many(self, exprs, data):
+        for expr in exprs:
+            match = expr.match(data)
+            if match:
+                return (match.groupdict(), data[match.end(0):])
+
+        return ({}, None)