Significantly improved parsing.
* Parsing complete for most of the non-deprecated gerber specification. * Initial evaluation machine in place, but no useful result yet.
This commit is contained in:
Paulo Henrique Silva
parent
d8f3aa9588
commit
35f0063876
1 changed files with 302 additions and 43 deletions
345
gerber/gerber.py
345
gerber/gerber.py
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@ -2,7 +2,6 @@
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# -*- coding: utf-8 -*-
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import re
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import string
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def red(s):
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@ -15,18 +14,114 @@ class Statement:
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class ParamStmt(Statement):
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def __init__(self):
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pass
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def __init__(self, type):
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self.type = type
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class FSParamStmt(ParamStmt):
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def __init__(self, type, zero, notation, x, y):
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ParamStmt.__init__(self, type)
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self.zero = zero
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self.notation = notation
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self.x = x
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self.y = y
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class MOParamStmt(ParamStmt):
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def __init__(self, type, mo):
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ParamStmt.__init__(self, type)
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self.mo = mo
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class IPParamStmt(ParamStmt):
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def __init__(self, type, ip):
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ParamStmt.__init__(self, type)
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self.ip = ip
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class OFParamStmt(ParamStmt):
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def __init__(self, type, a, b):
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ParamStmt.__init__(self, type)
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self.a = a
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self.b = b
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class LPParamStmt(ParamStmt):
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def __init__(self, type, lp):
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ParamStmt.__init__(self, type)
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self.lp = lp
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class ADParamStmt(ParamStmt):
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def __init__(self, type, d, shape):
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ParamStmt.__init__(self, type)
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self.d = d
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self.shape = shape
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class ADCircleParamStmt(ADParamStmt):
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def __init__(self, type, d, shape, definition):
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ADParamStmt.__init__(self, type, d, shape)
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self.definition = definition
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class ADRectParamStmt(ADParamStmt):
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def __init__(self, type, d, shape, definition):
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ADParamStmt.__init__(self, type, d, shape)
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self.definition = definition
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class ADObroundParamStmt(ADParamStmt):
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def __init__(self, type, d, shape, definition):
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ADParamStmt.__init__(self, type, d, shape)
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self.definition = definition
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class ADPolyParamStmt(ADParamStmt):
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def __init__(self, type, d, shape, definition):
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ADParamStmt.__init__(self, type, d, shape)
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self.definition = definition
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class ADMacroParamStmt(ADParamStmt):
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def __init__(self, type, d, name, definition):
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ADParamStmt.__init__(self, type, d, "M")
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self.name = name
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self.definition = definition
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class AMParamStmt(ParamStmt):
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def __init__(self, type, name, macro):
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ParamStmt.__init__(self, type)
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self.name = name
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self.macro = macro
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class INParamStmt(ParamStmt):
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def __init__(self, type, name):
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ParamStmt.__init__(self, type)
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self.name = name
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class LNParamStmt(ParamStmt):
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def __init__(self, type, name):
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ParamStmt.__init__(self, type)
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self.name = name
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class CoordStmt(Statement):
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def __init__(self):
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pass
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def __init__(self, function, x, y, i, j, op):
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self.function = function
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self.x = x
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self.y = y
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self.i = i
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self.j = j
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self.op = op
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class ApertureStmt(Statement):
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def __init__(self):
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pass
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def __init__(self, d):
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self.d = int(d)
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class CommentStmt(Statement):
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@ -43,62 +138,129 @@ class UnknownStmt(Statement):
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self.line = line
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IMAGE_POLARITY_POSITIVE = 1
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IMAGE_POLARITY_NEGATIVE = 2
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LEVEL_POLARITY_DARK = 1
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LEVEL_POLARITY_CLEAR = 2
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NOTATION_ABSOLUTE = 1
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NOTATION_INCREMENTAL = 2
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class GerberCoordFormat:
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def __init__(self, zeroes, x, y):
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self.omit_leading_zeroes = True if zeroes == "L" else False
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self.omit_trailing_zeroes = True if zeroes == "T" else False
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self.x_int_digits, self.x_dec_digits = [int(d) for d in x]
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self.y_int_digits, self.y_dec_digits = [int(d) for d in y]
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def resolve(self, x, y):
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return x, y
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class GerberContext:
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coord_format = None
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coord_notation = NOTATION_ABSOLUTE
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unit = None
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x = 0
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y = 0
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current_aperture = 0
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interpolation = None
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region_mode = False
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quadrant_mode = False
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image_polarity = IMAGE_POLARITY_POSITIVE
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level_polarity = LEVEL_POLARITY_DARK
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steps = (1, 1)
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repeat = (None, None)
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def __init__(self):
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pass
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def set_coord_format(self, zeroes, x, y):
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self.coord_format = GerberCoordFormat(zeroes, x, y)
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def set_coord_notation(self, notation):
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self.coord_notation = NOTATION_ABSOLUTE if notation == "A" else NOTATION_INCREMENTAL
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def set_image_polarity(self, polarity):
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self.image_polarity = IMAGE_POLARITY_POSITIVE if polarity == "POS" else IMAGE_POLARITY_NEGATIVE
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def set_level_polarity(self, polarity):
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self.level_polarity = LEVEL_POLARITY_DARK if polarity == "D" else LEVEL_POLARITY_CLEAR
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def move(self, x, y):
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self.x = x
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self.y = y
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def aperture(self, d):
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self.current_aperture = d
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class Gerber:
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NUMBER = r"[\+-]?\d+"
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FUNCTION = r"G\d{2}"
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STRING = r"[a-zA-Z0-9_+\-/!?<>”’(){}.\|&@# :]+"
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NAME = "[a-zA-Z_$][a-zA-Z_$0-9]+"
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COORD_OP = r"D[0]?[123]"
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PARAM_STMT = re.compile(r"%.*%")
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FS = r"(?P<type>FS)(?P<zero>(L|T))(?P<notation>(A|I))X(?P<x>[0-7][0-7])Y(?P<y>[0-7][0-7])"
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MO = r"(?P<type>MO)(?P<mo>(MM|IN))"
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IP = r"(?P<type>IP)(?P<ip>(POS|NEG))"
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LP = r"(?P<type>LP)(?P<lp>(D|C))"
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AD_CIRCLE = r"(?P<type>ADD)(?P<d>\d+)(?P<shape>C)(?P<definition>.*)"
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AD_RECT = r"(?P<type>ADD)(?P<d>\d+)(?P<shape>R)(?P<definition>.*)"
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AD_OBROUND = r"(?P<type>ADD)(?P<d>\d+)(?P<shape>O)(?P<definition>.*)"
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AD_POLY = r"(?P<type>ADD)(?P<d>\d+)(?P<shape>P)(?P<definition>.*)"
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AD_MACRO = r"(?P<type>ADD)(?P<d>\d+)(?P<name>[^CROP,].*)(?P<definition>.*)".format(name=NAME)
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AM = r"(?P<type>AM)(?P<name>{name})\*(?P<macro>.*)".format(name=NAME)
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# begin deprecated
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OF = r"(?P<type>OF)(A(?P<a>[+-]?\d+(.?\d*)))?(B(?P<b>[+-]?\d+(.?\d*)))?"
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IN = r"(?P<type>IN)(?P<name>.*)"
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LN = r"(?P<type>LN)(?P<name>.*)"
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# end deprecated
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PARAMS = (FS, MO, IP, LP, AD_CIRCLE, AD_RECT, AD_OBROUND, AD_MACRO, AD_POLY, AM, OF, IN, LN)
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PARAM_STMT = [re.compile(r"%{0}\*%".format(p)) for p in PARAMS]
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COORD_STMT = re.compile((
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r"(?P<f>{f})?"
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r"(?P<function>{function})?"
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r"(X(?P<x>{number}))?(Y(?P<y>{number}))?"
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r"(I(?P<i>{number}))?(J(?P<j>{number}))?"
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r"(?P<op>{op})?\*".format(number=NUMBER, f=FUNCTION, op=COORD_OP)))
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r"(?P<op>{op})?\*".format(number=NUMBER, function=FUNCTION, op=COORD_OP)))
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APERTURE_STMT = re.compile(r"(G54)?D\d+\*")
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APERTURE_STMT = re.compile(r"(G54)?D(?P<d>\d+)\*")
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COMMENT_STMT = re.compile(r"G04(?P<comment>{string})(\*)?".format(string=STRING))
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EOF_STMT = re.compile(r"M02\*")
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EOF_STMT = re.compile(r"(?P<eof>M02)\*")
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def __init__(self):
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self.tokens = []
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self.ctx = GerberContext()
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def parse(self, filename):
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fp = open(filename, "r")
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data = fp.readlines()
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self.tokens = list(self.tokenize(data))
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for token in self._tokenize(data):
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self._evaluate(token)
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for token in self.tokens:
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if isinstance(token, UnknownStmt):
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print filename
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print red("[INVALID TOKEN]")
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print "'%s'" % token.line
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def _match_one(self, expr, data):
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match = expr.match(data)
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if match is None:
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return {}
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else:
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return match.groupdict()
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def _match_many(self, expr, data):
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matches = expr.finditer(data)
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if not matches:
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return []
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else:
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return [match.groupdict() for match in matches]
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def tokenize(self, data):
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def _tokenize(self, data):
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multiline = None
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for i, line in enumerate(data):
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# remove EOL
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if multiline:
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if multiline:
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line = multiline + line.strip()
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else:
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line = line.strip()
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@ -114,23 +276,17 @@ class Gerber:
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else:
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multiline = None
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# parameter
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param = self._match_one(self.PARAM_STMT, line)
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if param:
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yield ParamStmt()
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continue
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# coord
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coords = self._match_many(self.COORD_STMT, line)
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if coords:
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for coord in coords:
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yield CoordStmt()
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yield CoordStmt(**coord)
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continue
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# aperture selection
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aperture = self._match_one(self.APERTURE_STMT, line)
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if aperture:
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yield ApertureStmt()
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yield ApertureStmt(**aperture)
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continue
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# comment
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@ -139,17 +295,120 @@ class Gerber:
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yield CommentStmt(comment["comment"])
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continue
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# parameter
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param = self._match_one_from_many(self.PARAM_STMT, line)
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if param:
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if param["type"] == "FS":
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yield FSParamStmt(**param)
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elif param["type"] == "MO":
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yield MOParamStmt(**param)
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elif param["type"] == "IP":
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yield IPParamStmt(**param)
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elif param["type"] == "LP":
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yield LPParamStmt(**param)
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elif param["type"] == "AD":
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if param["shape"] == "C":
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yield ADCircleParamStmt(**param)
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elif param["shape"] == "R":
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yield ADRectParamStmt(**param)
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elif param["shape"] == "O":
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yield ADObroundParamStmt(**param)
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elif param["shape"] == "P":
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yield ADPolyParamStmt(**param)
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else:
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yield ADMacroParamStmt(**param)
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elif param["type"] == "AM":
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yield AMParamStmt(**param)
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elif param["type"] == "OF":
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yield OFParamStmt(**param)
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elif param["type"] == "IN":
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yield INParamStmt(**param)
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elif param["type"] == "LN":
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yield LNParamStmt(**param)
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else:
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yield UnknownStmt(line)
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continue
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# eof
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eof = self._match_one(self.EOF_STMT, line)
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if eof:
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yield EofStmt()
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continue
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print red("UNKNOWN TOKEN")
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print "{0}:'{1}'".format(red(str(i+1)), line)
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if False:
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print self.COORD_STMT.pattern
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print self.APERTURE_STMT.pattern
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print self.COMMENT_STMT.pattern
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print self.EOF_STMT.pattern
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for i in self.PARAM_STMT:
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print i.pattern
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yield UnknownStmt(line)
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def _match_one(self, expr, data):
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match = expr.match(data)
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if match is None:
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return {}
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else:
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return match.groupdict()
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def _match_one_from_many(self, exprs, data):
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for expr in exprs:
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match = expr.match(data)
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if match:
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return match.groupdict()
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return {}
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def _match_many(self, expr, data):
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result = []
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pos = 0
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while True:
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match = expr.match(data, pos)
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if match:
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result.append(match.groupdict())
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pos = match.endpos
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else:
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break
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return result
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def _evaluate(self, token):
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if isinstance(token, (CommentStmt, UnknownStmt, EofStmt)):
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return
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elif isinstance(token, ParamStmt):
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self._evaluate_param(token)
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elif isinstance(token, CoordStmt):
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self._evaluate_coord(token)
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elif isinstance(token, ApertureStmt):
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self._evaluate_aperture(token)
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else:
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raise Exception("Invalid token to evaluate")
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def _evaluate_param(self, param):
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if param.type == "FS":
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self.ctx.set_coord_format(param.zero, param.x, param.y)
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self.ctx.set_coord_notation(param.notation)
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def _evaluate_coord(self, coord):
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self.ctx.move(coord.x, coord.y)
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def _evaluate_aperture(self, aperture):
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self.ctx.aperture(aperture.d)
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if __name__ == "__main__":
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import sys
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for f in sys.argv[1:]:
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print f
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g = Gerber()
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g.parse(f)
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