PCB element Python types
Stefan Schuermans commited on 2021-02-17 19:13:39
Showing 4 changed files, with 602 additions and 448 deletions.
- pcb_footpr_conv/.gitignore 0000000..a348e50
- pcb_footpr_conv/fp2dxf.py 4aba2d2..3e810ef
- pcb_footpr_conv/pcb_parser.py 0000000..6a5dabc
- pcb_footpr_conv/pcb_types.py 0000000..c05eea9
| ... | ... |
@@ -0,0 +1 @@ |
| 1 |
+/__pycache__/ |
| ... | ... |
@@ -1,457 +1,18 @@ |
| 1 | 1 |
#! /usr/bin/env python3 |
| 2 | 2 |
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+import pcb_parser |
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+import pcb_types |
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+ |
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import ezdxf |
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-import re |
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| 5 | 7 |
import sys |
| 6 | 8 |
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| 7 | 9 |
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-class ParseError(Exception): |
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- def __init__(self, msg: str, pos: str): |
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- super().__init__(self, msg, pos) |
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- self.msg = msg |
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- self.pos = pos |
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- |
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- def __repr__(self) -> str: |
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- return f'ParseError({repr(self.msg):s}, {repr(self.pos):s})'
|
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- |
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- def __str__(self) -> str: |
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- return f'ParseError: {self.msg:s} at {self.pos:s}'
|
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- |
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- |
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-class StringBuffer: |
|
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- """ |
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- Store a string, an index and provide some operations. |
|
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- """ |
|
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- |
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- def __init__(self, string: str): |
|
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- self._string = string |
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- self._index = 0 |
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- self._stack = [] |
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- |
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- def __enter__(self): |
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- self.enter() |
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- return self |
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- |
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- def __exit__(self, exc_type, _exc_value, _traceback): |
|
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- if exc_type is None: |
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- self.complete() |
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- else: |
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- self.backtrack() |
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- |
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- def advance(self, length: int): |
|
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- """ |
|
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- Advance the index by length. |
|
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- """ |
|
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- self._index = min(len(self._string), self._index + length) |
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- |
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- def backtrack(self): |
|
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- """ |
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- Track back from parsing something. |
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- Pop index from stack and use it as the new current index. |
|
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- """ |
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- self._index = self._stack[-1] |
|
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- del self._stack[-1] |
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- |
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- def check(self, s: str) -> bool: |
|
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- """ |
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- Check if string s follows index. |
|
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- If so, advance by length of s and return True |
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- Otherwise, keep index and return False. |
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- """ |
|
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- if self.peek(len(s)) == s: |
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- self.advance(len(s)) |
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- return True |
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- return False |
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- |
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- def complete(self): |
|
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- """ |
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- Complete parsing something. |
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- Pop index from stack and throw it away. |
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- """ |
|
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- del self._stack[-1] |
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- |
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- def enter(self): |
|
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- """ |
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- Enter parsing something. |
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- Push current index onto stack. |
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- """ |
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- self._stack.append(self._index) |
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- |
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- def expect(self, s: str): |
|
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- """ |
|
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- Check that string s follows index. |
|
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- If so, advance. |
|
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- If not, throw ParseError. |
|
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- """ |
|
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- if not self.check(s): |
|
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- raise ParseError(f'expected {repr(s):s}', self.pos())
|
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- |
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- def get(self, length: int) -> str: |
|
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- """ |
|
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- Return the next length characters and advance the index. |
|
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- """ |
|
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- s = self.peek(length) |
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- self.advance(length) |
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- return s |
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- |
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- def getRe(self, ptrn: re.Pattern): |
|
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- """ |
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- Return the matching the regular expression pattern and advance |
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- index or throw ParseError. |
|
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- """ |
|
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- m = ptrn.match(self._string[self._index:]) |
|
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- if not m: |
|
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- raise ParseError(f'expected pattern {repr(ptrn.pattern):s}',
|
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- self.pos()) |
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- self._index += len(m.group(0)) |
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- return m |
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- |
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- def peek(self, length: int) -> str: |
|
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- """ |
|
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- Return the next length characters without advancing the index. |
|
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- """ |
|
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- return self._string[self._index:self._index + length] |
|
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- |
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- def pos(self) -> str: |
|
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- """ |
|
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- Get string describing current position. |
|
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- """ |
|
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- before = self._string[:self._index].split('\n')
|
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- after = self._string[self._index:].split('\n')
|
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- line_no = len(before) |
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- column_no = len(before[-1]) + 1 |
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- rest = after[0] |
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- return f'line {line_no:d} column {column_no:d} {repr(rest):s}'
|
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- |
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- |
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-class PcbBaseParser(StringBuffer): |
|
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- """ |
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- Parser for the basic element of GNU PCB files. |
|
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- """ |
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- |
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- re_float = re.compile(r'^[+-]?(?:[0-9]+(?:\.[0-9]*)?|\.[0-9]+)' |
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- r'(?:[]eE[+-]?[0-9]\+)?') |
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- re_int = re.compile(r'^[+-]?[0-9]+') |
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- re_quoted = re.compile(r'^"([^"]*)"') |
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- re_space = re.compile(r'^\s+', re.MULTILINE) |
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- re_space_opt = re.compile(r'^\s*', re.MULTILINE) |
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- |
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- known_string_flags = set([ |
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- 'edge2', 'hole', 'nopaste', 'octagon', 'onsolder', 'pin', 'showname', |
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- 'square', 'via' |
|
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- ]) |
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- |
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- def parseCoord(self) -> float: |
|
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- """ |
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- Parse a coordinate. |
|
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- """ |
|
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- with self: |
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- f = self.parseFloat() |
|
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- if self.check('mil'):
|
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- f *= 100 # native unit == .01mil |
|
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- elif self.check('mm'):
|
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- f *= 1e5 / 25.4 # 25.4mm == 1inch == 1e5 * .01mil |
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- return f |
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- |
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- def parseFloat(self) -> float: |
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- """ |
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- Parse a floating point value. |
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- """ |
|
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- with self: |
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- s = self.getRe(self.re_float).group(0) |
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- try: |
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- return float(s) |
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- except ValueError as exc: |
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- raise ParseError(f'invalid floating point value {repr(s):s}',
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- self.pos()) |
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- |
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- def parseInt(self) -> int: |
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- """ |
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- Parse a decimal integer. |
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- """ |
|
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- with self: |
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- s = self.getRe(self.re_int).group(0) |
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- try: |
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- return int(s) |
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- except ValueError as exc: |
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- raise ParseError('invalid integer value {repr(s):s}',
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- self.pos()) |
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- |
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- def parseQuoted(self) -> str: |
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- """ |
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- Parse a quoted string. |
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- """ |
|
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- with self: |
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- return self.getRe(self.re_quoted).group(1) |
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- |
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- def parseStringFlags(self) -> list: |
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- """ |
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- Parse string flags. |
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- """ |
|
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- with self: |
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- q = self.parseQuoted() |
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- fs = set(q.split(','))
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- fs -= {''}
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- unk = fs - self.known_string_flags |
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- if unk: |
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- unknown = ','.join(sorted(unk)) |
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- raise ParseError(f'unknown string flags {unknown:s}',
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- self.pos()) |
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- return sorted(fs) |
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- |
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- def parseSpace(self): |
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- """ |
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- Parse at least one whitespace character or more. |
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- """ |
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- with self: |
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- self.getRe(self.re_space) |
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- |
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- def parseSpaceOpt(self): |
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- """ |
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- Parse any number of whitespace characters. |
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- """ |
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- with self: |
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- self.getRe(self.re_space_opt) |
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- |
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- |
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-class PcbFootprintParser(PcbBaseParser): |
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- """ |
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- Parser for a GNU PCB footprint file. |
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- """ |
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- |
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- def parseBody(self, contents: list): |
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- """ |
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- Parse a body of a block. |
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- contents: list of lambdas with options for recursive descent |
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- """ |
|
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- with self: |
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- self.parseOpen() |
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- while True: |
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- excs = [] # collect parse errors |
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- # end of body |
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- try: |
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- self.parseClose() |
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- break |
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- except ParseError as exc: |
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- excs.append(exc) |
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- # not end of body, try options |
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- # try options |
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- for c in contents: |
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- try: |
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- c() |
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- # option succeded, go to next content |
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- break |
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- except ParseError as exc: |
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- # an option failed, try next option |
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- excs.append(exc) |
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- # all options failed |
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- else: |
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- raise ParseError( |
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- 'invalid syntax, all options failed: ' + |
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- ', '.join([exc.msg for exc in excs]), self.pos()) |
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- |
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- def parseClose(self): |
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- """ |
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- Parse a closing parenthesis. |
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- """ |
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- with self: |
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- self.parseSpaceOpt() |
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- self.expect(')')
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- self.parseSpaceOpt() |
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- |
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- def parseElementArcClause(self): |
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- """ |
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- Parse a GNU PCB element arc clause. |
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- """ |
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- with self: |
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- self.parseSpaceOpt() |
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- self.expect('ElementArc')
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- self.parseSpaceOpt() |
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- self.expect('[')
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- self.parseSpaceOpt() |
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- r_x = self.parseCoord() |
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- self.parseSpace() |
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- r_y = self.parseCoord() |
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- self.parseSpace() |
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- width = self.parseCoord() |
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- self.parseSpace() |
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- height = self.parseCoord() |
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- self.parseSpace() |
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- start_angle = self.parseFloat() |
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- self.parseSpace() |
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- end_angle = self.parseFloat() |
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- self.parseSpace() |
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- thickness = self.parseCoord() |
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- self.parseSpaceOpt() |
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- self.expect(']')
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- self.parseSpaceOpt() |
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- |
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- def parseElementBlock(self): |
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- """ |
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- Parse a GNU PCB element block. |
|
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- """ |
|
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- with self: |
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- self.parseElementClause() |
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- self.parseBody([ |
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- # parse options |
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- lambda: self.parseElementArcClause(), |
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- lambda: self.parseElementLineClause(), |
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- lambda: self.parsePadClause(), |
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- lambda: self.parsePinClause() |
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- ]) |
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- |
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- def parseElementClause(self): |
|
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- """ |
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- Parse a GNU PCB element clause. |
|
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- """ |
|
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- with self: |
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- self.parseSpaceOpt() |
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- self.expect('Element')
|
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- self.parseSpaceOpt() |
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- self.expect('[')
|
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- self.parseSpaceOpt() |
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- s_flags = self.parseStringFlags() |
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- self.parseSpace() |
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- desc = self.parseQuoted() |
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- self.parseSpace() |
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- name = self.parseQuoted() |
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- self.parseSpace() |
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- value = self.parseQuoted() |
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- self.parseSpace() |
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- m_x = self.parseCoord() |
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- self.parseSpace() |
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- m_y = self.parseCoord() |
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- self.parseSpace() |
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- t_x = self.parseCoord() |
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- self.parseSpace() |
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- t_y = self.parseCoord() |
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- self.parseSpace() |
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- t_dir = self.parseInt() |
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- self.parseSpace() |
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- t_scale = self.parseInt() |
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- self.parseSpace() |
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- t_s_flags = self.parseStringFlags() |
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- self.parseSpaceOpt() |
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- self.expect(']')
|
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- self.parseSpaceOpt() |
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- |
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- def parseElementLineClause(self): |
|
| 339 |
- """ |
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- Parse a GNU PCB element line clause. |
|
| 341 |
- """ |
|
| 342 |
- with self: |
|
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- self.parseSpaceOpt() |
|
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- self.expect('ElementLine')
|
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| 345 |
- self.parseSpaceOpt() |
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- self.expect('[')
|
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| 347 |
- self.parseSpaceOpt() |
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| 348 |
- r_x1 = self.parseCoord() |
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| 349 |
- self.parseSpace() |
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| 350 |
- r_y1 = self.parseCoord() |
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| 351 |
- self.parseSpace() |
|
| 352 |
- r_x2 = self.parseCoord() |
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| 353 |
- self.parseSpace() |
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| 354 |
- r_y2 = self.parseCoord() |
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- self.parseSpace() |
|
| 356 |
- thickness = self.parseCoord() |
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| 357 |
- self.parseSpaceOpt() |
|
| 358 |
- self.expect(']')
|
|
| 359 |
- self.parseSpaceOpt() |
|
| 360 |
- |
|
| 361 |
- def parseOpen(self): |
|
| 362 |
- """ |
|
| 363 |
- Parse an opening parenthesis. |
|
| 364 |
- """ |
|
| 365 |
- with self: |
|
| 366 |
- self.parseSpaceOpt() |
|
| 367 |
- self.expect('(')
|
|
| 368 |
- self.parseSpaceOpt() |
|
| 369 |
- |
|
| 370 |
- def parsePadClause(self): |
|
| 371 |
- """ |
|
| 372 |
- Parse a GNU PCB pad clause. |
|
| 373 |
- """ |
|
| 374 |
- with self: |
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| 375 |
- self.parseSpaceOpt() |
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| 376 |
- self.expect('Pad')
|
|
| 377 |
- self.parseSpaceOpt() |
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| 378 |
- self.expect('[')
|
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| 379 |
- self.parseSpaceOpt() |
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| 380 |
- r_x1 = self.parseCoord() |
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| 381 |
- self.parseSpace() |
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| 382 |
- r_y1 = self.parseCoord() |
|
| 383 |
- self.parseSpace() |
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| 384 |
- r_x2 = self.parseCoord() |
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| 385 |
- self.parseSpace() |
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| 386 |
- r_y2 = self.parseCoord() |
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| 387 |
- self.parseSpace() |
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| 388 |
- thickness = self.parseCoord() |
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| 389 |
- self.parseSpace() |
|
| 390 |
- clearance = self.parseCoord() |
|
| 391 |
- self.parseSpace() |
|
| 392 |
- mask = self.parseCoord() |
|
| 393 |
- self.parseSpace() |
|
| 394 |
- name = self.parseQuoted() |
|
| 395 |
- self.parseSpace() |
|
| 396 |
- number = self.parseQuoted() |
|
| 397 |
- self.parseSpace() |
|
| 398 |
- s_flags = self.parseStringFlags() |
|
| 399 |
- self.parseSpaceOpt() |
|
| 400 |
- self.expect(']')
|
|
| 401 |
- self.parseSpaceOpt() |
|
| 402 |
- |
|
| 403 |
- def parsePinClause(self): |
|
| 404 |
- """ |
|
| 405 |
- Parse a GNU PCB pin clause. |
|
| 406 |
- """ |
|
| 407 |
- with self: |
|
| 408 |
- self.parseSpaceOpt() |
|
| 409 |
- self.expect('Pin')
|
|
| 410 |
- self.parseSpaceOpt() |
|
| 411 |
- self.expect('[')
|
|
| 412 |
- self.parseSpaceOpt() |
|
| 413 |
- r_x = self.parseCoord() |
|
| 414 |
- self.parseSpace() |
|
| 415 |
- r_y = self.parseCoord() |
|
| 416 |
- self.parseSpace() |
|
| 417 |
- thickness = self.parseCoord() |
|
| 418 |
- self.parseSpace() |
|
| 419 |
- clearance = self.parseCoord() |
|
| 420 |
- self.parseSpace() |
|
| 421 |
- mask = self.parseCoord() |
|
| 422 |
- self.parseSpace() |
|
| 423 |
- drill = self.parseCoord() |
|
| 424 |
- self.parseSpace() |
|
| 425 |
- name = self.parseQuoted() |
|
| 426 |
- self.parseSpace() |
|
| 427 |
- number = self.parseQuoted() |
|
| 428 |
- self.parseSpace() |
|
| 429 |
- s_flags = self.parseStringFlags() |
|
| 430 |
- self.parseSpaceOpt() |
|
| 431 |
- self.expect(']')
|
|
| 432 |
- self.parseSpaceOpt() |
|
| 433 |
- |
|
| 434 |
- |
|
| 435 |
-class PcbFootprint: |
|
| 436 |
- """ |
|
| 437 |
- A footprint of GNU PCB. |
|
| 438 |
- """ |
|
| 439 |
- |
|
| 440 |
- def __init__(self): |
|
| 441 |
- self.reset() |
|
| 442 |
- |
|
| 443 |
- def readPcb(self, file_name: str): |
|
| 444 |
- """ |
|
| 445 |
- Read a PCB footprint file. |
|
| 446 |
- """ |
|
| 447 |
- self.reset() |
|
| 10 |
+def read_footprint(file_name: str) -> pcb_types.Element: |
|
| 448 | 11 |
with open(file_name, 'r') as f: |
| 449 | 12 |
s = f.read() |
| 450 |
- p = PcbFootprintParser(s) |
|
| 451 |
- p.parseElementBlock() |
|
| 452 |
- |
|
| 453 |
- def reset(self): |
|
| 454 |
- pass |
|
| 13 |
+ parser = pcb_parser.PcbFootprintParser(s) |
|
| 14 |
+ element = parser.parseElementBlock() |
|
| 15 |
+ return element |
|
| 455 | 16 |
|
| 456 | 17 |
|
| 457 | 18 |
def write_dxf(file_name: str): |
| ... | ... |
@@ -462,8 +23,8 @@ def write_dxf(file_name: str): |
| 462 | 23 |
|
| 463 | 24 |
|
| 464 | 25 |
def main(): |
| 465 |
- fp = PcbFootprint() |
|
| 466 |
- fp.readPcb(sys.argv[1]) |
|
| 26 |
+ fp = read_footprint(sys.argv[1]) |
|
| 27 |
+ print(fp) |
|
| 467 | 28 |
|
| 468 | 29 |
|
| 469 | 30 |
if __name__ == '__main__': |
| ... | ... |
@@ -0,0 +1,445 @@ |
| 1 |
+""" |
|
| 2 |
+Parser for GNU PCB files. |
|
| 3 |
+""" |
|
| 4 |
+ |
|
| 5 |
+import re |
|
| 6 |
+ |
|
| 7 |
+import pcb_types |
|
| 8 |
+ |
|
| 9 |
+ |
|
| 10 |
+class ParseError(Exception): |
|
| 11 |
+ def __init__(self, msg: str, pos: str): |
|
| 12 |
+ super().__init__(self, msg, pos) |
|
| 13 |
+ self.msg = msg |
|
| 14 |
+ self.pos = pos |
|
| 15 |
+ |
|
| 16 |
+ def __repr__(self) -> str: |
|
| 17 |
+ return f'ParseError({repr(self.msg):s}, {repr(self.pos):s})'
|
|
| 18 |
+ |
|
| 19 |
+ def __str__(self) -> str: |
|
| 20 |
+ return f'ParseError: {self.msg:s} at {self.pos:s}'
|
|
| 21 |
+ |
|
| 22 |
+ |
|
| 23 |
+class StringBuffer: |
|
| 24 |
+ """ |
|
| 25 |
+ Store a string, an index and provide some operations. |
|
| 26 |
+ """ |
|
| 27 |
+ |
|
| 28 |
+ def __init__(self, string: str): |
|
| 29 |
+ self._string = string |
|
| 30 |
+ self._index = 0 |
|
| 31 |
+ self._stack = [] |
|
| 32 |
+ |
|
| 33 |
+ def __enter__(self): |
|
| 34 |
+ self.enter() |
|
| 35 |
+ return self |
|
| 36 |
+ |
|
| 37 |
+ def __exit__(self, exc_type, _exc_value, _traceback): |
|
| 38 |
+ if exc_type is None: |
|
| 39 |
+ self.complete() |
|
| 40 |
+ else: |
|
| 41 |
+ self.backtrack() |
|
| 42 |
+ |
|
| 43 |
+ def advance(self, length: int): |
|
| 44 |
+ """ |
|
| 45 |
+ Advance the index by length. |
|
| 46 |
+ """ |
|
| 47 |
+ self._index = min(len(self._string), self._index + length) |
|
| 48 |
+ |
|
| 49 |
+ def backtrack(self): |
|
| 50 |
+ """ |
|
| 51 |
+ Track back from parsing something. |
|
| 52 |
+ Pop index from stack and use it as the new current index. |
|
| 53 |
+ """ |
|
| 54 |
+ self._index = self._stack[-1] |
|
| 55 |
+ del self._stack[-1] |
|
| 56 |
+ |
|
| 57 |
+ def check(self, s: str) -> bool: |
|
| 58 |
+ """ |
|
| 59 |
+ Check if string s follows index. |
|
| 60 |
+ If so, advance by length of s and return True |
|
| 61 |
+ Otherwise, keep index and return False. |
|
| 62 |
+ """ |
|
| 63 |
+ if self.peek(len(s)) == s: |
|
| 64 |
+ self.advance(len(s)) |
|
| 65 |
+ return True |
|
| 66 |
+ return False |
|
| 67 |
+ |
|
| 68 |
+ def complete(self): |
|
| 69 |
+ """ |
|
| 70 |
+ Complete parsing something. |
|
| 71 |
+ Pop index from stack and throw it away. |
|
| 72 |
+ """ |
|
| 73 |
+ del self._stack[-1] |
|
| 74 |
+ |
|
| 75 |
+ def enter(self): |
|
| 76 |
+ """ |
|
| 77 |
+ Enter parsing something. |
|
| 78 |
+ Push current index onto stack. |
|
| 79 |
+ """ |
|
| 80 |
+ self._stack.append(self._index) |
|
| 81 |
+ |
|
| 82 |
+ def expect(self, s: str): |
|
| 83 |
+ """ |
|
| 84 |
+ Check that string s follows index. |
|
| 85 |
+ If so, advance. |
|
| 86 |
+ If not, throw ParseError. |
|
| 87 |
+ """ |
|
| 88 |
+ if not self.check(s): |
|
| 89 |
+ raise ParseError(f'expected {repr(s):s}', self.pos())
|
|
| 90 |
+ |
|
| 91 |
+ def get(self, length: int) -> str: |
|
| 92 |
+ """ |
|
| 93 |
+ Return the next length characters and advance the index. |
|
| 94 |
+ """ |
|
| 95 |
+ s = self.peek(length) |
|
| 96 |
+ self.advance(length) |
|
| 97 |
+ return s |
|
| 98 |
+ |
|
| 99 |
+ def getRe(self, ptrn: re.Pattern): |
|
| 100 |
+ """ |
|
| 101 |
+ Return the matching the regular expression pattern and advance |
|
| 102 |
+ index or throw ParseError. |
|
| 103 |
+ """ |
|
| 104 |
+ m = ptrn.match(self._string[self._index:]) |
|
| 105 |
+ if not m: |
|
| 106 |
+ raise ParseError(f'expected pattern {repr(ptrn.pattern):s}',
|
|
| 107 |
+ self.pos()) |
|
| 108 |
+ self._index += len(m.group(0)) |
|
| 109 |
+ return m |
|
| 110 |
+ |
|
| 111 |
+ def peek(self, length: int) -> str: |
|
| 112 |
+ """ |
|
| 113 |
+ Return the next length characters without advancing the index. |
|
| 114 |
+ """ |
|
| 115 |
+ return self._string[self._index:self._index + length] |
|
| 116 |
+ |
|
| 117 |
+ def pos(self) -> str: |
|
| 118 |
+ """ |
|
| 119 |
+ Get string describing current position. |
|
| 120 |
+ """ |
|
| 121 |
+ before = self._string[:self._index].split('\n')
|
|
| 122 |
+ after = self._string[self._index:].split('\n')
|
|
| 123 |
+ line_no = len(before) |
|
| 124 |
+ column_no = len(before[-1]) + 1 |
|
| 125 |
+ rest = after[0] |
|
| 126 |
+ return f'line {line_no:d} column {column_no:d} {repr(rest):s}'
|
|
| 127 |
+ |
|
| 128 |
+ |
|
| 129 |
+class PcbBaseParser(StringBuffer): |
|
| 130 |
+ """ |
|
| 131 |
+ Parser for the basic element of GNU PCB files. |
|
| 132 |
+ """ |
|
| 133 |
+ |
|
| 134 |
+ re_float = re.compile(r'^[+-]?(?:[0-9]+(?:\.[0-9]*)?|\.[0-9]+)' |
|
| 135 |
+ r'(?:[]eE[+-]?[0-9]\+)?') |
|
| 136 |
+ re_int = re.compile(r'^[+-]?[0-9]+') |
|
| 137 |
+ re_quoted = re.compile(r'^"([^"]*)"') |
|
| 138 |
+ re_space = re.compile(r'^\s+', re.MULTILINE) |
|
| 139 |
+ re_space_opt = re.compile(r'^\s*', re.MULTILINE) |
|
| 140 |
+ |
|
| 141 |
+ known_string_flags = set([ |
|
| 142 |
+ 'edge2', 'hole', 'nopaste', 'octagon', 'onsolder', 'pin', 'showname', |
|
| 143 |
+ 'square', 'via' |
|
| 144 |
+ ]) |
|
| 145 |
+ |
|
| 146 |
+ def parseCoord(self) -> float: |
|
| 147 |
+ """ |
|
| 148 |
+ Parse a coordinate. |
|
| 149 |
+ """ |
|
| 150 |
+ with self: |
|
| 151 |
+ f = self.parseFloat() |
|
| 152 |
+ if self.check('mil'):
|
|
| 153 |
+ f *= 100 # native unit == .01mil |
|
| 154 |
+ elif self.check('mm'):
|
|
| 155 |
+ f *= 1e5 / 25.4 # 25.4mm == 1inch == 1e5 * .01mil |
|
| 156 |
+ return f |
|
| 157 |
+ |
|
| 158 |
+ def parseFloat(self) -> float: |
|
| 159 |
+ """ |
|
| 160 |
+ Parse a floating point value. |
|
| 161 |
+ """ |
|
| 162 |
+ with self: |
|
| 163 |
+ s = self.getRe(self.re_float).group(0) |
|
| 164 |
+ try: |
|
| 165 |
+ return float(s) |
|
| 166 |
+ except ValueError as exc: |
|
| 167 |
+ raise ParseError(f'invalid floating point value {repr(s):s}',
|
|
| 168 |
+ self.pos()) |
|
| 169 |
+ |
|
| 170 |
+ def parseInt(self) -> int: |
|
| 171 |
+ """ |
|
| 172 |
+ Parse a decimal integer. |
|
| 173 |
+ """ |
|
| 174 |
+ with self: |
|
| 175 |
+ s = self.getRe(self.re_int).group(0) |
|
| 176 |
+ try: |
|
| 177 |
+ return int(s) |
|
| 178 |
+ except ValueError as exc: |
|
| 179 |
+ raise ParseError('invalid integer value {repr(s):s}',
|
|
| 180 |
+ self.pos()) |
|
| 181 |
+ |
|
| 182 |
+ def parseQuoted(self) -> str: |
|
| 183 |
+ """ |
|
| 184 |
+ Parse a quoted string. |
|
| 185 |
+ """ |
|
| 186 |
+ with self: |
|
| 187 |
+ return self.getRe(self.re_quoted).group(1) |
|
| 188 |
+ |
|
| 189 |
+ def parseStringFlags(self) -> list: |
|
| 190 |
+ """ |
|
| 191 |
+ Parse string flags. |
|
| 192 |
+ """ |
|
| 193 |
+ with self: |
|
| 194 |
+ q = self.parseQuoted() |
|
| 195 |
+ fs = set(q.split(','))
|
|
| 196 |
+ fs -= {''}
|
|
| 197 |
+ unk = fs - self.known_string_flags |
|
| 198 |
+ if unk: |
|
| 199 |
+ unknown = ','.join(sorted(unk)) |
|
| 200 |
+ raise ParseError(f'unknown string flags {unknown:s}',
|
|
| 201 |
+ self.pos()) |
|
| 202 |
+ return sorted(fs) |
|
| 203 |
+ |
|
| 204 |
+ def parseSpace(self): |
|
| 205 |
+ """ |
|
| 206 |
+ Parse at least one whitespace character or more. |
|
| 207 |
+ """ |
|
| 208 |
+ with self: |
|
| 209 |
+ self.getRe(self.re_space) |
|
| 210 |
+ |
|
| 211 |
+ def parseSpaceOpt(self): |
|
| 212 |
+ """ |
|
| 213 |
+ Parse any number of whitespace characters. |
|
| 214 |
+ """ |
|
| 215 |
+ with self: |
|
| 216 |
+ self.getRe(self.re_space_opt) |
|
| 217 |
+ |
|
| 218 |
+ |
|
| 219 |
+class PcbFootprintParser(PcbBaseParser): |
|
| 220 |
+ """ |
|
| 221 |
+ Parser for a GNU PCB footprint file. |
|
| 222 |
+ """ |
|
| 223 |
+ |
|
| 224 |
+ def parseBody(self, contents: list): |
|
| 225 |
+ """ |
|
| 226 |
+ Parse a body of a block. |
|
| 227 |
+ contents: list of lambdas with options for recursive descent |
|
| 228 |
+ """ |
|
| 229 |
+ with self: |
|
| 230 |
+ self.parseOpen() |
|
| 231 |
+ while True: |
|
| 232 |
+ excs = [] # collect parse errors |
|
| 233 |
+ # end of body |
|
| 234 |
+ try: |
|
| 235 |
+ self.parseClose() |
|
| 236 |
+ break |
|
| 237 |
+ except ParseError as exc: |
|
| 238 |
+ excs.append(exc) |
|
| 239 |
+ # not end of body, try options |
|
| 240 |
+ # try options |
|
| 241 |
+ for c in contents: |
|
| 242 |
+ try: |
|
| 243 |
+ c() |
|
| 244 |
+ # option succeded, go to next content |
|
| 245 |
+ break |
|
| 246 |
+ except ParseError as exc: |
|
| 247 |
+ # an option failed, try next option |
|
| 248 |
+ excs.append(exc) |
|
| 249 |
+ # all options failed |
|
| 250 |
+ else: |
|
| 251 |
+ raise ParseError( |
|
| 252 |
+ 'invalid syntax, all options failed: ' + |
|
| 253 |
+ ', '.join([exc.msg for exc in excs]), self.pos()) |
|
| 254 |
+ |
|
| 255 |
+ def parseClose(self): |
|
| 256 |
+ """ |
|
| 257 |
+ Parse a closing parenthesis. |
|
| 258 |
+ """ |
|
| 259 |
+ with self: |
|
| 260 |
+ self.parseSpaceOpt() |
|
| 261 |
+ self.expect(')')
|
|
| 262 |
+ self.parseSpaceOpt() |
|
| 263 |
+ |
|
| 264 |
+ def parseElementArcClause(self) -> pcb_types.ElementArc: |
|
| 265 |
+ """ |
|
| 266 |
+ Parse a GNU PCB element arc clause. |
|
| 267 |
+ """ |
|
| 268 |
+ with self: |
|
| 269 |
+ self.parseSpaceOpt() |
|
| 270 |
+ self.expect('ElementArc')
|
|
| 271 |
+ self.parseSpaceOpt() |
|
| 272 |
+ self.expect('[')
|
|
| 273 |
+ self.parseSpaceOpt() |
|
| 274 |
+ element_arc = pcb_types.ElementArc() |
|
| 275 |
+ element_arc.r_x = self.parseCoord() |
|
| 276 |
+ self.parseSpace() |
|
| 277 |
+ element_arc.r_y = self.parseCoord() |
|
| 278 |
+ self.parseSpace() |
|
| 279 |
+ element_arc.width = self.parseCoord() |
|
| 280 |
+ self.parseSpace() |
|
| 281 |
+ element_arc.height = self.parseCoord() |
|
| 282 |
+ self.parseSpace() |
|
| 283 |
+ element_arc.start_angle = self.parseFloat() |
|
| 284 |
+ self.parseSpace() |
|
| 285 |
+ element_arc.end_angle = self.parseFloat() |
|
| 286 |
+ self.parseSpace() |
|
| 287 |
+ element_arc.thickness = self.parseCoord() |
|
| 288 |
+ self.parseSpaceOpt() |
|
| 289 |
+ self.expect(']')
|
|
| 290 |
+ self.parseSpaceOpt() |
|
| 291 |
+ return element_arc |
|
| 292 |
+ |
|
| 293 |
+ def parseElementBlock(self) -> pcb_types.Element: |
|
| 294 |
+ """ |
|
| 295 |
+ Parse a GNU PCB element block. |
|
| 296 |
+ """ |
|
| 297 |
+ with self: |
|
| 298 |
+ element = self.parseElementClause() |
|
| 299 |
+ self.parseBody([ |
|
| 300 |
+ # parse options |
|
| 301 |
+ lambda: element.body.append(self.parseElementArcClause()), |
|
| 302 |
+ lambda: element.body.append(self.parseElementLineClause()), |
|
| 303 |
+ lambda: element.body.append(self.parsePadClause()), |
|
| 304 |
+ lambda: element.body.append(self.parsePinClause()) |
|
| 305 |
+ ]) |
|
| 306 |
+ return element |
|
| 307 |
+ |
|
| 308 |
+ def parseElementClause(self) -> pcb_types.Element: |
|
| 309 |
+ """ |
|
| 310 |
+ Parse a GNU PCB element clause. |
|
| 311 |
+ """ |
|
| 312 |
+ with self: |
|
| 313 |
+ self.parseSpaceOpt() |
|
| 314 |
+ self.expect('Element')
|
|
| 315 |
+ self.parseSpaceOpt() |
|
| 316 |
+ self.expect('[')
|
|
| 317 |
+ self.parseSpaceOpt() |
|
| 318 |
+ element = pcb_types.Element() |
|
| 319 |
+ element.s_flags = self.parseStringFlags() |
|
| 320 |
+ self.parseSpace() |
|
| 321 |
+ element.desc = self.parseQuoted() |
|
| 322 |
+ self.parseSpace() |
|
| 323 |
+ element.name = self.parseQuoted() |
|
| 324 |
+ self.parseSpace() |
|
| 325 |
+ element.value = self.parseQuoted() |
|
| 326 |
+ self.parseSpace() |
|
| 327 |
+ element.m_x = self.parseCoord() |
|
| 328 |
+ self.parseSpace() |
|
| 329 |
+ element.m_y = self.parseCoord() |
|
| 330 |
+ self.parseSpace() |
|
| 331 |
+ element.t_x = self.parseCoord() |
|
| 332 |
+ self.parseSpace() |
|
| 333 |
+ element.t_y = self.parseCoord() |
|
| 334 |
+ self.parseSpace() |
|
| 335 |
+ element.t_dir = self.parseInt() |
|
| 336 |
+ self.parseSpace() |
|
| 337 |
+ element.t_scale = self.parseInt() |
|
| 338 |
+ self.parseSpace() |
|
| 339 |
+ element.t_s_flags = self.parseStringFlags() |
|
| 340 |
+ self.parseSpaceOpt() |
|
| 341 |
+ self.expect(']')
|
|
| 342 |
+ self.parseSpaceOpt() |
|
| 343 |
+ return element |
|
| 344 |
+ |
|
| 345 |
+ def parseElementLineClause(self) -> pcb_types.ElementLine: |
|
| 346 |
+ """ |
|
| 347 |
+ Parse a GNU PCB element line clause. |
|
| 348 |
+ """ |
|
| 349 |
+ with self: |
|
| 350 |
+ self.parseSpaceOpt() |
|
| 351 |
+ self.expect('ElementLine')
|
|
| 352 |
+ self.parseSpaceOpt() |
|
| 353 |
+ self.expect('[')
|
|
| 354 |
+ self.parseSpaceOpt() |
|
| 355 |
+ element_line = pcb_types.ElementLine() |
|
| 356 |
+ element_line.r_x1 = self.parseCoord() |
|
| 357 |
+ self.parseSpace() |
|
| 358 |
+ element_line.r_y1 = self.parseCoord() |
|
| 359 |
+ self.parseSpace() |
|
| 360 |
+ element_line.r_x2 = self.parseCoord() |
|
| 361 |
+ self.parseSpace() |
|
| 362 |
+ element_line.r_y2 = self.parseCoord() |
|
| 363 |
+ self.parseSpace() |
|
| 364 |
+ element_line.thickness = self.parseCoord() |
|
| 365 |
+ self.parseSpaceOpt() |
|
| 366 |
+ self.expect(']')
|
|
| 367 |
+ self.parseSpaceOpt() |
|
| 368 |
+ return element_line |
|
| 369 |
+ |
|
| 370 |
+ def parseOpen(self): |
|
| 371 |
+ """ |
|
| 372 |
+ Parse an opening parenthesis. |
|
| 373 |
+ """ |
|
| 374 |
+ with self: |
|
| 375 |
+ self.parseSpaceOpt() |
|
| 376 |
+ self.expect('(')
|
|
| 377 |
+ self.parseSpaceOpt() |
|
| 378 |
+ |
|
| 379 |
+ def parsePadClause(self) -> pcb_types.Pad: |
|
| 380 |
+ """ |
|
| 381 |
+ Parse a GNU PCB pad clause. |
|
| 382 |
+ """ |
|
| 383 |
+ with self: |
|
| 384 |
+ self.parseSpaceOpt() |
|
| 385 |
+ self.expect('Pad')
|
|
| 386 |
+ self.parseSpaceOpt() |
|
| 387 |
+ self.expect('[')
|
|
| 388 |
+ self.parseSpaceOpt() |
|
| 389 |
+ pad = pcb_types.Pad() |
|
| 390 |
+ pad.r_x1 = self.parseCoord() |
|
| 391 |
+ self.parseSpace() |
|
| 392 |
+ pad.r_y1 = self.parseCoord() |
|
| 393 |
+ self.parseSpace() |
|
| 394 |
+ pad.r_x2 = self.parseCoord() |
|
| 395 |
+ self.parseSpace() |
|
| 396 |
+ pad.r_y2 = self.parseCoord() |
|
| 397 |
+ self.parseSpace() |
|
| 398 |
+ pad.thickness = self.parseCoord() |
|
| 399 |
+ self.parseSpace() |
|
| 400 |
+ pad.clearance = self.parseCoord() |
|
| 401 |
+ self.parseSpace() |
|
| 402 |
+ pad.mask = self.parseCoord() |
|
| 403 |
+ self.parseSpace() |
|
| 404 |
+ pad.name = self.parseQuoted() |
|
| 405 |
+ self.parseSpace() |
|
| 406 |
+ pad.number = self.parseQuoted() |
|
| 407 |
+ self.parseSpace() |
|
| 408 |
+ pad.s_flags = self.parseStringFlags() |
|
| 409 |
+ self.parseSpaceOpt() |
|
| 410 |
+ self.expect(']')
|
|
| 411 |
+ self.parseSpaceOpt() |
|
| 412 |
+ return pad |
|
| 413 |
+ |
|
| 414 |
+ def parsePinClause(self) -> pcb_types.Pin: |
|
| 415 |
+ """ |
|
| 416 |
+ Parse a GNU PCB pin clause. |
|
| 417 |
+ """ |
|
| 418 |
+ with self: |
|
| 419 |
+ self.parseSpaceOpt() |
|
| 420 |
+ self.expect('Pin')
|
|
| 421 |
+ self.parseSpaceOpt() |
|
| 422 |
+ self.expect('[')
|
|
| 423 |
+ self.parseSpaceOpt() |
|
| 424 |
+ pin = pcb_types.Pin() |
|
| 425 |
+ pin.r_x = self.parseCoord() |
|
| 426 |
+ self.parseSpace() |
|
| 427 |
+ pin.r_y = self.parseCoord() |
|
| 428 |
+ self.parseSpace() |
|
| 429 |
+ pin.thickness = self.parseCoord() |
|
| 430 |
+ self.parseSpace() |
|
| 431 |
+ pin.clearance = self.parseCoord() |
|
| 432 |
+ self.parseSpace() |
|
| 433 |
+ pin.mask = self.parseCoord() |
|
| 434 |
+ self.parseSpace() |
|
| 435 |
+ pin.drill = self.parseCoord() |
|
| 436 |
+ self.parseSpace() |
|
| 437 |
+ pin.name = self.parseQuoted() |
|
| 438 |
+ self.parseSpace() |
|
| 439 |
+ pin.number = self.parseQuoted() |
|
| 440 |
+ self.parseSpace() |
|
| 441 |
+ pin.s_flags = self.parseStringFlags() |
|
| 442 |
+ self.parseSpaceOpt() |
|
| 443 |
+ self.expect(']')
|
|
| 444 |
+ self.parseSpaceOpt() |
|
| 445 |
+ return pin |
| ... | ... |
@@ -0,0 +1,147 @@ |
| 1 |
+""" |
|
| 2 |
+Types representing entities of GNU PCB files. |
|
| 3 |
+""" |
|
| 4 |
+ |
|
| 5 |
+import collections |
|
| 6 |
+ |
|
| 7 |
+ |
|
| 8 |
+class Struct: |
|
| 9 |
+ """ |
|
| 10 |
+ Base class for struct-like Python objects |
|
| 11 |
+ """ |
|
| 12 |
+ |
|
| 13 |
+ _attrs = collections.OrderedDict() # attribute name: str -> default value |
|
| 14 |
+ |
|
| 15 |
+ def __init__(self, **kwargs): |
|
| 16 |
+ for name, def_val in self._attrs.items(): |
|
| 17 |
+ setattr(self, name, def_val) |
|
| 18 |
+ for name, val in kwargs.items(): |
|
| 19 |
+ if name not in self._attrs: |
|
| 20 |
+ raise ValueError( |
|
| 21 |
+ f'{type(self).__name__:s} does not have attribute {name:s}'
|
|
| 22 |
+ ) |
|
| 23 |
+ setattr(self, name, val) |
|
| 24 |
+ |
|
| 25 |
+ def __repr__(self) -> str: |
|
| 26 |
+ vals = ', '.join([ |
|
| 27 |
+ f'{name:s}={repr(getattr(self, name)):s}'
|
|
| 28 |
+ for name in self._attrs.keys() |
|
| 29 |
+ ]) |
|
| 30 |
+ return f'{type(self).__name__:s}({vals:s})'
|
|
| 31 |
+ |
|
| 32 |
+ def _compare(self, other) -> int: |
|
| 33 |
+ if self._attrs != other._attrs: |
|
| 34 |
+ raise ValueError(f'{type(self).__name__:s} cannot be'
|
|
| 35 |
+ f' compared to {type(other).__name__:s}')
|
|
| 36 |
+ for name in self._attrs: |
|
| 37 |
+ s = getattr(self, name) |
|
| 38 |
+ o = getattr(other, name) |
|
| 39 |
+ if s < o: |
|
| 40 |
+ return -1 |
|
| 41 |
+ if s > o: |
|
| 42 |
+ return 1 |
|
| 43 |
+ return 0 |
|
| 44 |
+ |
|
| 45 |
+ def __eq__(self, other) -> bool: |
|
| 46 |
+ return self._compare(other) == 0 |
|
| 47 |
+ |
|
| 48 |
+ def __ne__(self, other) -> bool: |
|
| 49 |
+ return self._compare(other) != 0 |
|
| 50 |
+ |
|
| 51 |
+ def __lt__(self, other) -> bool: |
|
| 52 |
+ return self._compare(other) < 0 |
|
| 53 |
+ |
|
| 54 |
+ def __le__(self, other) -> bool: |
|
| 55 |
+ return self._compare(other) <= 0 |
|
| 56 |
+ |
|
| 57 |
+ def __gt__(self, other) -> bool: |
|
| 58 |
+ return self._compare(other) > 0 |
|
| 59 |
+ |
|
| 60 |
+ def __ge__(self, other) -> bool: |
|
| 61 |
+ return self._compare(other) >= 0 |
|
| 62 |
+ |
|
| 63 |
+ |
|
| 64 |
+class Element(Struct): |
|
| 65 |
+ """ |
|
| 66 |
+ Element entity in a GNU PCB file. |
|
| 67 |
+ """ |
|
| 68 |
+ |
|
| 69 |
+ _attrs = collections.OrderedDict([('s_flags', []), ('desc', ''),
|
|
| 70 |
+ ('name', ''), ('value', ''),
|
|
| 71 |
+ ('m_x', 0.0), ('m_y', 0.0), ('t_x', 0.0),
|
|
| 72 |
+ ('t_y', 0.0), ('t_dir', 0),
|
|
| 73 |
+ ('t_scale', 0.0), ('t_s_flags', []),
|
|
| 74 |
+ ('body', [])])
|
|
| 75 |
+ |
|
| 76 |
+ def __init__(self, **kwargs): |
|
| 77 |
+ super().__init__(**kwargs) |
|
| 78 |
+ |
|
| 79 |
+ |
|
| 80 |
+class ElementArc(Struct): |
|
| 81 |
+ """ |
|
| 82 |
+ ElementArc entity in a GNU PCB file. |
|
| 83 |
+ """ |
|
| 84 |
+ |
|
| 85 |
+ _attrs = collections.OrderedDict([('r_x', 0.0), ('r_y', 0.0),
|
|
| 86 |
+ ('width', 0.0), ('height', 0.0),
|
|
| 87 |
+ ('start_angle', 0.0), ('end_angle', 0.0),
|
|
| 88 |
+ ('thickness', 0.0)])
|
|
| 89 |
+ |
|
| 90 |
+ def __init__(self, **kwargs): |
|
| 91 |
+ super().__init__(**kwargs) |
|
| 92 |
+ |
|
| 93 |
+ |
|
| 94 |
+class ElementLine(Struct): |
|
| 95 |
+ """ |
|
| 96 |
+ ElementLine entity in a GNU PCB file. |
|
| 97 |
+ """ |
|
| 98 |
+ |
|
| 99 |
+ _attrs = collections.OrderedDict([('r_x1', 0.0), ('r_y1', 0.0),
|
|
| 100 |
+ ('r_x2', 0.0), ('r_y2', 0.0),
|
|
| 101 |
+ ('thickness', 0.0)])
|
|
| 102 |
+ |
|
| 103 |
+ def __init__(self, **kwargs): |
|
| 104 |
+ super().__init__(**kwargs) |
|
| 105 |
+ |
|
| 106 |
+ |
|
| 107 |
+class Pad(Struct): |
|
| 108 |
+ """ |
|
| 109 |
+ Pad entity in a GNU PCB file. |
|
| 110 |
+ """ |
|
| 111 |
+ |
|
| 112 |
+ _attrs = collections.OrderedDict([ |
|
| 113 |
+ ('r_x1', 0.0),
|
|
| 114 |
+ ('r_y1', 0.0),
|
|
| 115 |
+ ('r_x2', 0.0),
|
|
| 116 |
+ ('r_y2', 0.0),
|
|
| 117 |
+ ('thickness', 0.0),
|
|
| 118 |
+ ('clearance', 0.0),
|
|
| 119 |
+ ('mask', 0.0),
|
|
| 120 |
+ ('name', ''),
|
|
| 121 |
+ ('number', ''),
|
|
| 122 |
+ ('s_flags', []),
|
|
| 123 |
+ ]) |
|
| 124 |
+ |
|
| 125 |
+ def __init__(self, **kwargs): |
|
| 126 |
+ super().__init__(**kwargs) |
|
| 127 |
+ |
|
| 128 |
+ |
|
| 129 |
+class Pin(Struct): |
|
| 130 |
+ """ |
|
| 131 |
+ Pin entity in a GNU PCB file. |
|
| 132 |
+ """ |
|
| 133 |
+ |
|
| 134 |
+ _attrs = collections.OrderedDict([ |
|
| 135 |
+ ('r_x', 0.0),
|
|
| 136 |
+ ('r_y', 0.0),
|
|
| 137 |
+ ('thickness', 0.0),
|
|
| 138 |
+ ('clearance', 0.0),
|
|
| 139 |
+ ('mask', 0.0),
|
|
| 140 |
+ ('drill', 0.0),
|
|
| 141 |
+ ('name', ''),
|
|
| 142 |
+ ('number', ''),
|
|
| 143 |
+ ('s_flags', []),
|
|
| 144 |
+ ]) |
|
| 145 |
+ |
|
| 146 |
+ def __init__(self, **kwargs): |
|
| 147 |
+ super().__init__(**kwargs) |
|
| 0 | 148 |