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Diffstat (limited to 'gerber/excellon_tool.py')
| -rw-r--r-- | gerber/excellon_tool.py | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/gerber/excellon_tool.py b/gerber/excellon_tool.py new file mode 100644 index 0000000..b7d67d4 --- /dev/null +++ b/gerber/excellon_tool.py @@ -0,0 +1,111 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +# Copyright 2015 Garret Fick <garret@ficksworkshop.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. + +""" +Excellon Tool Definition File module +==================== +**Excellon file classes** + +This module provides Excellon file classes and parsing utilities +""" + +import re +try: + from cStringIO import StringIO +except(ImportError): + from io import StringIO + +from .excellon_statements import ExcellonTool + +def loads(data, settings=None): + """ Read tool file information and return a map of tools + Parameters + ---------- + data : string + string containing Excellon Tool Definition file contents + + Returns + ------- + dict tool name: ExcellonTool + + """ + return ExcellonToolDefinitionParser(settings).parse_raw(data) + +class ExcellonToolDefinitionParser(object): + """ Excellon File Parser + + Parameters + ---------- + None + """ + + allegro_tool = re.compile(r'(?P<size>[0-9/.]+)\s+(?P<plated>P|N)\s+T(?P<toolid>[0-9]{2})\s+(?P<xtol>[0-9/.]+)\s+(?P<ytol>[0-9/.]+)') + allegro_comment_mils = re.compile('Holesize (?P<toolid>[0-9]{1,2})\. = (?P<size>[0-9/.]+) Tolerance = \+(?P<xtol>[0-9/.]+)/-(?P<ytol>[0-9/.]+) (?P<plated>(PLATED)|(NON_PLATED)) MILS Quantity = [0-9]+') + allegro_comment_mm = re.compile('Holesize (?P<toolid>[0-9]{1,2})\. = (?P<size>[0-9/.]+) Tolerance = \+(?P<xtol>[0-9/.]+)/-(?P<ytol>[0-9/.]+) (?P<plated>(PLATED)|(NON_PLATED)) MM Quantity = [0-9]+') + + matchers = [ + (allegro_tool, 'mils'), + (allegro_comment_mils, 'mils'), + (allegro_comment_mils, 'mm'), + ] + + def __init__(self, settings=None): + self.tools = {} + self.settings = settings + + def parse_raw(self, data): + for line in StringIO(data): + self._parse(line.strip()) + + return self.tools + + def _parse(self, line): + + for matcher in ExcellonToolDefinitionParser.matchers: + m = matcher[0].match(line) + if m: + unit = matcher[1] + + size = float(m.group('size')) + plated = m.group('plated') + toolid = int(m.group('toolid')) + xtol = float(m.group('xtol')) + ytol = float(m.group('ytol')) + + size = self._convert_length(size, unit) + xtol = self._convert_length(xtol, unit) + ytol = self._convert_length(ytol, unit) + + tool = ExcellonTool(None, number=toolid, diameter=size) + + self.tools[tool.number] = tool + + break + + def _convert_length(self, value, unit): + + # Convert the value to mm + if unit == 'mils': + value /= 39.3700787402 + + # Now convert to the settings unit + if self.settings.units == 'inch': + return value / 25.4 + else: + # Already in mm + return value +
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