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e8ff3c92f6
Previously, pickling did not fail, but the result could not be unpickled.
(cherry picked from commit 6d0d547033)
262 lines
7.0 KiB
Python
262 lines
7.0 KiB
Python
#
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# Secret Labs' Regular Expression Engine
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#
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# various symbols used by the regular expression engine.
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# run this script to update the _sre include files!
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#
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# Copyright (c) 1998-2001 by Secret Labs AB. All rights reserved.
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#
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# See the sre.py file for information on usage and redistribution.
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#
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"""Internal support module for sre"""
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# update when constants are added or removed
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MAGIC = 20171005
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from _sre import MAXREPEAT, MAXGROUPS
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# SRE standard exception (access as sre.error)
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# should this really be here?
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class error(Exception):
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"""Exception raised for invalid regular expressions.
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Attributes:
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msg: The unformatted error message
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pattern: The regular expression pattern
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pos: The index in the pattern where compilation failed (may be None)
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lineno: The line corresponding to pos (may be None)
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colno: The column corresponding to pos (may be None)
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"""
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__module__ = 're'
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def __init__(self, msg, pattern=None, pos=None):
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self.msg = msg
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self.pattern = pattern
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self.pos = pos
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if pattern is not None and pos is not None:
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msg = '%s at position %d' % (msg, pos)
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if isinstance(pattern, str):
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newline = '\n'
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else:
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newline = b'\n'
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self.lineno = pattern.count(newline, 0, pos) + 1
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self.colno = pos - pattern.rfind(newline, 0, pos)
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if newline in pattern:
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msg = '%s (line %d, column %d)' % (msg, self.lineno, self.colno)
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else:
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self.lineno = self.colno = None
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super().__init__(msg)
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class _NamedIntConstant(int):
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def __new__(cls, value, name):
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self = super(_NamedIntConstant, cls).__new__(cls, value)
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self.name = name
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return self
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def __repr__(self):
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return self.name
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__reduce__ = None
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MAXREPEAT = _NamedIntConstant(MAXREPEAT, 'MAXREPEAT')
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def _makecodes(names):
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names = names.strip().split()
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items = [_NamedIntConstant(i, name) for i, name in enumerate(names)]
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globals().update({item.name: item for item in items})
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return items
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# operators
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# failure=0 success=1 (just because it looks better that way :-)
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OPCODES = _makecodes("""
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FAILURE SUCCESS
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ANY ANY_ALL
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ASSERT ASSERT_NOT
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AT
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BRANCH
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CALL
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CATEGORY
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CHARSET BIGCHARSET
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GROUPREF GROUPREF_EXISTS
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IN
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INFO
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JUMP
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LITERAL
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MARK
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MAX_UNTIL
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MIN_UNTIL
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NOT_LITERAL
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NEGATE
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RANGE
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REPEAT
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REPEAT_ONE
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SUBPATTERN
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MIN_REPEAT_ONE
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GROUPREF_IGNORE
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IN_IGNORE
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LITERAL_IGNORE
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NOT_LITERAL_IGNORE
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GROUPREF_LOC_IGNORE
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IN_LOC_IGNORE
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LITERAL_LOC_IGNORE
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NOT_LITERAL_LOC_IGNORE
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GROUPREF_UNI_IGNORE
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IN_UNI_IGNORE
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LITERAL_UNI_IGNORE
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NOT_LITERAL_UNI_IGNORE
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RANGE_UNI_IGNORE
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MIN_REPEAT MAX_REPEAT
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""")
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del OPCODES[-2:] # remove MIN_REPEAT and MAX_REPEAT
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# positions
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ATCODES = _makecodes("""
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AT_BEGINNING AT_BEGINNING_LINE AT_BEGINNING_STRING
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AT_BOUNDARY AT_NON_BOUNDARY
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AT_END AT_END_LINE AT_END_STRING
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AT_LOC_BOUNDARY AT_LOC_NON_BOUNDARY
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AT_UNI_BOUNDARY AT_UNI_NON_BOUNDARY
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""")
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# categories
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CHCODES = _makecodes("""
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CATEGORY_DIGIT CATEGORY_NOT_DIGIT
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CATEGORY_SPACE CATEGORY_NOT_SPACE
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CATEGORY_WORD CATEGORY_NOT_WORD
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CATEGORY_LINEBREAK CATEGORY_NOT_LINEBREAK
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CATEGORY_LOC_WORD CATEGORY_LOC_NOT_WORD
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CATEGORY_UNI_DIGIT CATEGORY_UNI_NOT_DIGIT
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CATEGORY_UNI_SPACE CATEGORY_UNI_NOT_SPACE
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CATEGORY_UNI_WORD CATEGORY_UNI_NOT_WORD
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CATEGORY_UNI_LINEBREAK CATEGORY_UNI_NOT_LINEBREAK
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""")
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# replacement operations for "ignore case" mode
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OP_IGNORE = {
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LITERAL: LITERAL_IGNORE,
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NOT_LITERAL: NOT_LITERAL_IGNORE,
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}
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OP_LOCALE_IGNORE = {
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LITERAL: LITERAL_LOC_IGNORE,
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NOT_LITERAL: NOT_LITERAL_LOC_IGNORE,
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}
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OP_UNICODE_IGNORE = {
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LITERAL: LITERAL_UNI_IGNORE,
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NOT_LITERAL: NOT_LITERAL_UNI_IGNORE,
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}
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AT_MULTILINE = {
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AT_BEGINNING: AT_BEGINNING_LINE,
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AT_END: AT_END_LINE
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}
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AT_LOCALE = {
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AT_BOUNDARY: AT_LOC_BOUNDARY,
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AT_NON_BOUNDARY: AT_LOC_NON_BOUNDARY
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}
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AT_UNICODE = {
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AT_BOUNDARY: AT_UNI_BOUNDARY,
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AT_NON_BOUNDARY: AT_UNI_NON_BOUNDARY
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}
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CH_LOCALE = {
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CATEGORY_DIGIT: CATEGORY_DIGIT,
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CATEGORY_NOT_DIGIT: CATEGORY_NOT_DIGIT,
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CATEGORY_SPACE: CATEGORY_SPACE,
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CATEGORY_NOT_SPACE: CATEGORY_NOT_SPACE,
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CATEGORY_WORD: CATEGORY_LOC_WORD,
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CATEGORY_NOT_WORD: CATEGORY_LOC_NOT_WORD,
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CATEGORY_LINEBREAK: CATEGORY_LINEBREAK,
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CATEGORY_NOT_LINEBREAK: CATEGORY_NOT_LINEBREAK
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}
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CH_UNICODE = {
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CATEGORY_DIGIT: CATEGORY_UNI_DIGIT,
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CATEGORY_NOT_DIGIT: CATEGORY_UNI_NOT_DIGIT,
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CATEGORY_SPACE: CATEGORY_UNI_SPACE,
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CATEGORY_NOT_SPACE: CATEGORY_UNI_NOT_SPACE,
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CATEGORY_WORD: CATEGORY_UNI_WORD,
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CATEGORY_NOT_WORD: CATEGORY_UNI_NOT_WORD,
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CATEGORY_LINEBREAK: CATEGORY_UNI_LINEBREAK,
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CATEGORY_NOT_LINEBREAK: CATEGORY_UNI_NOT_LINEBREAK
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}
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# flags
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SRE_FLAG_TEMPLATE = 1 # template mode (disable backtracking)
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SRE_FLAG_IGNORECASE = 2 # case insensitive
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SRE_FLAG_LOCALE = 4 # honour system locale
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SRE_FLAG_MULTILINE = 8 # treat target as multiline string
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SRE_FLAG_DOTALL = 16 # treat target as a single string
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SRE_FLAG_UNICODE = 32 # use unicode "locale"
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SRE_FLAG_VERBOSE = 64 # ignore whitespace and comments
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SRE_FLAG_DEBUG = 128 # debugging
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SRE_FLAG_ASCII = 256 # use ascii "locale"
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# flags for INFO primitive
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SRE_INFO_PREFIX = 1 # has prefix
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SRE_INFO_LITERAL = 2 # entire pattern is literal (given by prefix)
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SRE_INFO_CHARSET = 4 # pattern starts with character from given set
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if __name__ == "__main__":
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def dump(f, d, prefix):
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items = sorted(d)
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for item in items:
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f.write("#define %s_%s %d\n" % (prefix, item, item))
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with open("sre_constants.h", "w") as f:
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f.write("""\
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/*
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* Secret Labs' Regular Expression Engine
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*
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* regular expression matching engine
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*
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* NOTE: This file is generated by sre_constants.py. If you need
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* to change anything in here, edit sre_constants.py and run it.
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*
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* Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.
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*
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* See the _sre.c file for information on usage and redistribution.
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*/
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""")
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f.write("#define SRE_MAGIC %d\n" % MAGIC)
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dump(f, OPCODES, "SRE_OP")
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dump(f, ATCODES, "SRE")
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dump(f, CHCODES, "SRE")
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f.write("#define SRE_FLAG_TEMPLATE %d\n" % SRE_FLAG_TEMPLATE)
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f.write("#define SRE_FLAG_IGNORECASE %d\n" % SRE_FLAG_IGNORECASE)
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f.write("#define SRE_FLAG_LOCALE %d\n" % SRE_FLAG_LOCALE)
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f.write("#define SRE_FLAG_MULTILINE %d\n" % SRE_FLAG_MULTILINE)
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f.write("#define SRE_FLAG_DOTALL %d\n" % SRE_FLAG_DOTALL)
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f.write("#define SRE_FLAG_UNICODE %d\n" % SRE_FLAG_UNICODE)
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f.write("#define SRE_FLAG_VERBOSE %d\n" % SRE_FLAG_VERBOSE)
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f.write("#define SRE_FLAG_DEBUG %d\n" % SRE_FLAG_DEBUG)
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f.write("#define SRE_FLAG_ASCII %d\n" % SRE_FLAG_ASCII)
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f.write("#define SRE_INFO_PREFIX %d\n" % SRE_INFO_PREFIX)
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f.write("#define SRE_INFO_LITERAL %d\n" % SRE_INFO_LITERAL)
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f.write("#define SRE_INFO_CHARSET %d\n" % SRE_INFO_CHARSET)
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print("done")
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