| # |
| # 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 sre.py file for information on usage and redistribution. |
| # |
| |
| """Internal support module for sre""" |
| |
| # update when constants are added or removed |
| |
| MAGIC = 20171005 |
| |
| 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 |
| |
| MAXREPEAT = _NamedIntConstant(MAXREPEAT, 'MAXREPEAT') |
| |
| def _makecodes(names): |
| names = names.strip().split() |
| items = [_NamedIntConstant(i, name) for i, name in enumerate(names)] |
| globals().update({item.name: item for item in items}) |
| return items |
| |
| # operators |
| # failure=0 success=1 (just because it looks better that way :-) |
| OPCODES = _makecodes(""" |
| FAILURE SUCCESS |
| |
| ANY ANY_ALL |
| ASSERT ASSERT_NOT |
| AT |
| BRANCH |
| CALL |
| 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 |
| |
| 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 |
| |
| 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 (disable backtracking) |
| 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 |
| |
| if __name__ == "__main__": |
| def dump(f, d, prefix): |
| items = sorted(d) |
| for item in items: |
| f.write("#define %s_%s %d\n" % (prefix, item, item)) |
| with open("sre_constants.h", "w") as f: |
| f.write("""\ |
| /* |
| * Secret Labs' Regular Expression Engine |
| * |
| * regular expression matching engine |
| * |
| * NOTE: This file is generated by sre_constants.py. If you need |
| * to change anything in here, edit sre_constants.py and run it. |
| * |
| * Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved. |
| * |
| * See the _sre.c file for information on usage and redistribution. |
| */ |
| |
| """) |
| |
| f.write("#define SRE_MAGIC %d\n" % MAGIC) |
| |
| dump(f, OPCODES, "SRE_OP") |
| dump(f, ATCODES, "SRE") |
| dump(f, CHCODES, "SRE") |
| |
| f.write("#define SRE_FLAG_TEMPLATE %d\n" % SRE_FLAG_TEMPLATE) |
| f.write("#define SRE_FLAG_IGNORECASE %d\n" % SRE_FLAG_IGNORECASE) |
| f.write("#define SRE_FLAG_LOCALE %d\n" % SRE_FLAG_LOCALE) |
| f.write("#define SRE_FLAG_MULTILINE %d\n" % SRE_FLAG_MULTILINE) |
| f.write("#define SRE_FLAG_DOTALL %d\n" % SRE_FLAG_DOTALL) |
| f.write("#define SRE_FLAG_UNICODE %d\n" % SRE_FLAG_UNICODE) |
| f.write("#define SRE_FLAG_VERBOSE %d\n" % SRE_FLAG_VERBOSE) |
| f.write("#define SRE_FLAG_DEBUG %d\n" % SRE_FLAG_DEBUG) |
| f.write("#define SRE_FLAG_ASCII %d\n" % SRE_FLAG_ASCII) |
| |
| f.write("#define SRE_INFO_PREFIX %d\n" % SRE_INFO_PREFIX) |
| f.write("#define SRE_INFO_LITERAL %d\n" % SRE_INFO_LITERAL) |
| f.write("#define SRE_INFO_CHARSET %d\n" % SRE_INFO_CHARSET) |
| |
| print("done") |
