111 lines
No EOL
3.5 KiB
Python
111 lines
No EOL
3.5 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2015 Garret Fick <garret@ficksworkshop.com>
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Excellon Tool Definition File module
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====================
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**Excellon file classes**
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This module provides Excellon file classes and parsing utilities
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"""
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import re
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try:
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from cStringIO import StringIO
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except(ImportError):
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from io import StringIO
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from .excellon_statements import ExcellonTool
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def loads(data, settings=None):
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""" Read tool file information and return a map of tools
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Parameters
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----------
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data : string
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string containing Excellon Tool Definition file contents
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Returns
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-------
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dict tool name: ExcellonTool
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"""
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return ExcellonToolDefinitionParser(settings).parse_raw(data)
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class ExcellonToolDefinitionParser(object):
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""" Excellon File Parser
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Parameters
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----------
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None
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"""
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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/.]+)')
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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]+')
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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]+')
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matchers = [
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(allegro_tool, 'mils'),
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(allegro_comment_mils, 'mils'),
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(allegro_comment_mm, 'mm'),
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]
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def __init__(self, settings=None):
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self.tools = {}
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self.settings = settings
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def parse_raw(self, data):
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for line in StringIO(data):
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self._parse(line.strip())
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return self.tools
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def _parse(self, line):
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for matcher in ExcellonToolDefinitionParser.matchers:
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m = matcher[0].match(line)
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if m:
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unit = matcher[1]
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size = float(m.group('size'))
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plated = m.group('plated')
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toolid = int(m.group('toolid'))
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xtol = float(m.group('xtol'))
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ytol = float(m.group('ytol'))
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size = self._convert_length(size, unit)
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xtol = self._convert_length(xtol, unit)
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ytol = self._convert_length(ytol, unit)
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tool = ExcellonTool(None, number=toolid, diameter=size)
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self.tools[tool.number] = tool
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break
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def _convert_length(self, value, unit):
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# Convert the value to mm
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if unit == 'mils':
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value /= 39.3700787402
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# Now convert to the settings unit
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if self.settings.units == 'inch':
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return value / 25.4
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else:
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# Already in mm
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return value
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