diff options
Diffstat (limited to 'Lib/sre_constants.py')
| -rw-r--r-- | Lib/sre_constants.py | 259 |
1 files changed, 110 insertions, 149 deletions
diff --git a/Lib/sre_constants.py b/Lib/sre_constants.py index 23e3516..fc684ae 100644 --- a/Lib/sre_constants.py +++ b/Lib/sre_constants.py @@ -13,153 +13,115 @@ # update when constants are added or removed -MAGIC = 20031017 +MAGIC = 20140917 -from _sre import MAXREPEAT +from _sre import MAXREPEAT, MAXGROUPS # SRE standard exception (access as sre.error) # should this really be here? class error(Exception): - pass + 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 __str__(self): + return self.name + + __repr__ = __str__ + +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 GROUPREF_IGNORE + IN IN_IGNORE + INFO + JUMP + LITERAL LITERAL_IGNORE + MARK + MAX_UNTIL + MIN_UNTIL + NOT_LITERAL NOT_LITERAL_IGNORE + NEGATE + RANGE + REPEAT + REPEAT_ONE + SUBPATTERN + MIN_REPEAT_ONE + RANGE_IGNORE -FAILURE = "failure" -SUCCESS = "success" - -ANY = "any" -ANY_ALL = "any_all" -ASSERT = "assert" -ASSERT_NOT = "assert_not" -AT = "at" -BIGCHARSET = "bigcharset" -BRANCH = "branch" -CALL = "call" -CATEGORY = "category" -CHARSET = "charset" -GROUPREF = "groupref" -GROUPREF_IGNORE = "groupref_ignore" -GROUPREF_EXISTS = "groupref_exists" -IN = "in" -IN_IGNORE = "in_ignore" -INFO = "info" -JUMP = "jump" -LITERAL = "literal" -LITERAL_IGNORE = "literal_ignore" -MARK = "mark" -MAX_REPEAT = "max_repeat" -MAX_UNTIL = "max_until" -MIN_REPEAT = "min_repeat" -MIN_UNTIL = "min_until" -NEGATE = "negate" -NOT_LITERAL = "not_literal" -NOT_LITERAL_IGNORE = "not_literal_ignore" -RANGE = "range" -REPEAT = "repeat" -REPEAT_ONE = "repeat_one" -SUBPATTERN = "subpattern" -MIN_REPEAT_ONE = "min_repeat_one" + MIN_REPEAT MAX_REPEAT +""") +del OPCODES[-2:] # remove MIN_REPEAT and MAX_REPEAT # positions -AT_BEGINNING = "at_beginning" -AT_BEGINNING_LINE = "at_beginning_line" -AT_BEGINNING_STRING = "at_beginning_string" -AT_BOUNDARY = "at_boundary" -AT_NON_BOUNDARY = "at_non_boundary" -AT_END = "at_end" -AT_END_LINE = "at_end_line" -AT_END_STRING = "at_end_string" -AT_LOC_BOUNDARY = "at_loc_boundary" -AT_LOC_NON_BOUNDARY = "at_loc_non_boundary" -AT_UNI_BOUNDARY = "at_uni_boundary" -AT_UNI_NON_BOUNDARY = "at_uni_non_boundary" +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 -CATEGORY_DIGIT = "category_digit" -CATEGORY_NOT_DIGIT = "category_not_digit" -CATEGORY_SPACE = "category_space" -CATEGORY_NOT_SPACE = "category_not_space" -CATEGORY_WORD = "category_word" -CATEGORY_NOT_WORD = "category_not_word" -CATEGORY_LINEBREAK = "category_linebreak" -CATEGORY_NOT_LINEBREAK = "category_not_linebreak" -CATEGORY_LOC_WORD = "category_loc_word" -CATEGORY_LOC_NOT_WORD = "category_loc_not_word" -CATEGORY_UNI_DIGIT = "category_uni_digit" -CATEGORY_UNI_NOT_DIGIT = "category_uni_not_digit" -CATEGORY_UNI_SPACE = "category_uni_space" -CATEGORY_UNI_NOT_SPACE = "category_uni_not_space" -CATEGORY_UNI_WORD = "category_uni_word" -CATEGORY_UNI_NOT_WORD = "category_uni_not_word" -CATEGORY_UNI_LINEBREAK = "category_uni_linebreak" -CATEGORY_UNI_NOT_LINEBREAK = "category_uni_not_linebreak" - -OPCODES = [ - - # failure=0 success=1 (just because it looks better that way :-) - FAILURE, SUCCESS, - - ANY, ANY_ALL, - ASSERT, ASSERT_NOT, - AT, - BRANCH, - CALL, - CATEGORY, - CHARSET, BIGCHARSET, - GROUPREF, GROUPREF_EXISTS, GROUPREF_IGNORE, - IN, IN_IGNORE, - INFO, - JUMP, - LITERAL, LITERAL_IGNORE, - MARK, - MAX_UNTIL, - MIN_UNTIL, - NOT_LITERAL, NOT_LITERAL_IGNORE, - NEGATE, - RANGE, - REPEAT, - REPEAT_ONE, - SUBPATTERN, - MIN_REPEAT_ONE +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 +""") -] - -ATCODES = [ - 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 -] - -CHCODES = [ - 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 -] - -def makedict(list): - d = {} - i = 0 - for item in list: - d[item] = i - i = i + 1 - return d - -OPCODES = makedict(OPCODES) -ATCODES = makedict(ATCODES) -CHCODES = makedict(CHCODES) # replacement operations for "ignore case" mode OP_IGNORE = { GROUPREF: GROUPREF_IGNORE, IN: IN_IGNORE, LITERAL: LITERAL_IGNORE, - NOT_LITERAL: NOT_LITERAL_IGNORE + NOT_LITERAL: NOT_LITERAL_IGNORE, + RANGE: RANGE_IGNORE, } AT_MULTILINE = { @@ -217,11 +179,11 @@ SRE_INFO_CHARSET = 4 # pattern starts with character from given set if __name__ == "__main__": def dump(f, d, prefix): - items = sorted(d.items(), key=lambda a: a[1]) - for k, v in items: - f.write("#define %s_%s %s\n" % (prefix, k.upper(), v)) - f = open("sre_constants.h", "w") - f.write("""\ + 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 * @@ -237,25 +199,24 @@ if __name__ == "__main__": """) - f.write("#define SRE_MAGIC %d\n" % MAGIC) + f.write("#define SRE_MAGIC %d\n" % MAGIC) - dump(f, OPCODES, "SRE_OP") - dump(f, ATCODES, "SRE") - dump(f, CHCODES, "SRE") + 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_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) + 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) - f.close() print("done") |