JezK
Edit File: _constants.py
# # Secret Labs' Regular Expression Engine # # various symbols used by the regular expression engine. # run this script to update the _sre include files! # # Copyright (c) 1998-2001 by Secret Labs AB. All rights reserved. # # See the __init__.py file for information on usage and redistribution. # """Internal support module for sre""" # update when constants are added or removed MAGIC = 20220615 from _sre import MAXREPEAT, MAXGROUPS # SRE standard exception (access as sre.error) # should this really be here? class error(Exception): """Exception raised for invalid regular expressions. Attributes: msg: The unformatted error message pattern: The regular expression pattern pos: The index in the pattern where compilation failed (may be None) lineno: The line corresponding to pos (may be None) colno: The column corresponding to pos (may be None) """ __module__ = 're' def __init__(self, msg, pattern=None, pos=None): self.msg = msg self.pattern = pattern self.pos = pos if pattern is not None and pos is not None: msg = '%s at position %d' % (msg, pos) if isinstance(pattern, str): newline = '\n' else: newline = b'\n' self.lineno = pattern.count(newline, 0, pos) + 1 self.colno = pos - pattern.rfind(newline, 0, pos) if newline in pattern: msg = '%s (line %d, column %d)' % (msg, self.lineno, self.colno) else: self.lineno = self.colno = None super().__init__(msg) class _NamedIntConstant(int): def __new__(cls, value, name): self = super(_NamedIntConstant, cls).__new__(cls, value) self.name = name return self def __repr__(self): return self.name __reduce__ = None MAXREPEAT = _NamedIntConstant(MAXREPEAT, 'MAXREPEAT') def _makecodes(*names): items = [_NamedIntConstant(i, name) for i, name in enumerate(names)] globals().update({item.name: item for item in items}) return items # operators OPCODES = _makecodes( # failure=0 success=1 (just because it looks better that way :-) 'FAILURE', 'SUCCESS', 'ANY', 'ANY_ALL', 'ASSERT', 'ASSERT_NOT', 'AT', 'BRANCH', 'CATEGORY', 'CHARSET', 'BIGCHARSET', 'GROUPREF', 'GROUPREF_EXISTS', 'IN', 'INFO', 'JUMP', 'LITERAL', 'MARK', 'MAX_UNTIL', 'MIN_UNTIL', 'NOT_LITERAL', 'NEGATE', 'RANGE', 'REPEAT', 'REPEAT_ONE', 'SUBPATTERN', 'MIN_REPEAT_ONE', 'ATOMIC_GROUP', 'POSSESSIVE_REPEAT', 'POSSESSIVE_REPEAT_ONE', 'GROUPREF_IGNORE', 'IN_IGNORE', 'LITERAL_IGNORE', 'NOT_LITERAL_IGNORE', 'GROUPREF_LOC_IGNORE', 'IN_LOC_IGNORE', 'LITERAL_LOC_IGNORE', 'NOT_LITERAL_LOC_IGNORE', 'GROUPREF_UNI_IGNORE', 'IN_UNI_IGNORE', 'LITERAL_UNI_IGNORE', 'NOT_LITERAL_UNI_IGNORE', 'RANGE_UNI_IGNORE', # The following opcodes are only occurred in the parser output, # but not in the compiled code. 'MIN_REPEAT', 'MAX_REPEAT', ) del OPCODES[-2:] # remove MIN_REPEAT and MAX_REPEAT # positions ATCODES = _makecodes( 'AT_BEGINNING', 'AT_BEGINNING_LINE', 'AT_BEGINNING_STRING', 'AT_BOUNDARY', 'AT_NON_BOUNDARY', 'AT_END', 'AT_END_LINE', 'AT_END_STRING', 'AT_LOC_BOUNDARY', 'AT_LOC_NON_BOUNDARY', 'AT_UNI_BOUNDARY', 'AT_UNI_NON_BOUNDARY', ) # categories CHCODES = _makecodes( 'CATEGORY_DIGIT', 'CATEGORY_NOT_DIGIT', 'CATEGORY_SPACE', 'CATEGORY_NOT_SPACE', 'CATEGORY_WORD', 'CATEGORY_NOT_WORD', 'CATEGORY_LINEBREAK', 'CATEGORY_NOT_LINEBREAK', 'CATEGORY_LOC_WORD', 'CATEGORY_LOC_NOT_WORD', 'CATEGORY_UNI_DIGIT', 'CATEGORY_UNI_NOT_DIGIT', 'CATEGORY_UNI_SPACE', 'CATEGORY_UNI_NOT_SPACE', 'CATEGORY_UNI_WORD', 'CATEGORY_UNI_NOT_WORD', 'CATEGORY_UNI_LINEBREAK', 'CATEGORY_UNI_NOT_LINEBREAK', ) # replacement operations for "ignore case" mode OP_IGNORE = { LITERAL: LITERAL_IGNORE, NOT_LITERAL: NOT_LITERAL_IGNORE, } OP_LOCALE_IGNORE = { LITERAL: LITERAL_LOC_IGNORE, NOT_LITERAL: NOT_LITERAL_LOC_IGNORE, } OP_UNICODE_IGNORE = { LITERAL: LITERAL_UNI_IGNORE, NOT_LITERAL: NOT_LITERAL_UNI_IGNORE, } AT_MULTILINE = { AT_BEGINNING: AT_BEGINNING_LINE, AT_END: AT_END_LINE } AT_LOCALE = { AT_BOUNDARY: AT_LOC_BOUNDARY, AT_NON_BOUNDARY: AT_LOC_NON_BOUNDARY } AT_UNICODE = { AT_BOUNDARY: AT_UNI_BOUNDARY, AT_NON_BOUNDARY: AT_UNI_NON_BOUNDARY } CH_LOCALE = { CATEGORY_DIGIT: CATEGORY_DIGIT, CATEGORY_NOT_DIGIT: CATEGORY_NOT_DIGIT, CATEGORY_SPACE: CATEGORY_SPACE, CATEGORY_NOT_SPACE: CATEGORY_NOT_SPACE, CATEGORY_WORD: CATEGORY_LOC_WORD, CATEGORY_NOT_WORD: CATEGORY_LOC_NOT_WORD, CATEGORY_LINEBREAK: CATEGORY_LINEBREAK, CATEGORY_NOT_LINEBREAK: CATEGORY_NOT_LINEBREAK } CH_UNICODE = { CATEGORY_DIGIT: CATEGORY_UNI_DIGIT, CATEGORY_NOT_DIGIT: CATEGORY_UNI_NOT_DIGIT, CATEGORY_SPACE: CATEGORY_UNI_SPACE, CATEGORY_NOT_SPACE: CATEGORY_UNI_NOT_SPACE, CATEGORY_WORD: CATEGORY_UNI_WORD, CATEGORY_NOT_WORD: CATEGORY_UNI_NOT_WORD, CATEGORY_LINEBREAK: CATEGORY_UNI_LINEBREAK, CATEGORY_NOT_LINEBREAK: CATEGORY_UNI_NOT_LINEBREAK } # flags SRE_FLAG_TEMPLATE = 1 # template mode (unknown purpose, deprecated) SRE_FLAG_IGNORECASE = 2 # case insensitive SRE_FLAG_LOCALE = 4 # honour system locale SRE_FLAG_MULTILINE = 8 # treat target as multiline string SRE_FLAG_DOTALL = 16 # treat target as a single string SRE_FLAG_UNICODE = 32 # use unicode "locale" SRE_FLAG_VERBOSE = 64 # ignore whitespace and comments SRE_FLAG_DEBUG = 128 # debugging SRE_FLAG_ASCII = 256 # use ascii "locale" # flags for INFO primitive SRE_INFO_PREFIX = 1 # has prefix SRE_INFO_LITERAL = 2 # entire pattern is literal (given by prefix) SRE_INFO_CHARSET = 4 # pattern starts with character from given set