262 lines
7.2 KiB
Python
262 lines
7.2 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 = 20031017
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# max code word in this release
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MAXREPEAT = 65535
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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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pass
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# operators
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FAILURE = "failure"
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SUCCESS = "success"
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ANY = "any"
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ANY_ALL = "any_all"
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ASSERT = "assert"
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ASSERT_NOT = "assert_not"
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AT = "at"
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BIGCHARSET = "bigcharset"
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BRANCH = "branch"
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CALL = "call"
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CATEGORY = "category"
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CHARSET = "charset"
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GROUPREF = "groupref"
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GROUPREF_IGNORE = "groupref_ignore"
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GROUPREF_EXISTS = "groupref_exists"
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IN = "in"
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IN_IGNORE = "in_ignore"
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INFO = "info"
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JUMP = "jump"
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LITERAL = "literal"
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LITERAL_IGNORE = "literal_ignore"
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MARK = "mark"
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MAX_REPEAT = "max_repeat"
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MAX_UNTIL = "max_until"
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MIN_REPEAT = "min_repeat"
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MIN_UNTIL = "min_until"
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NEGATE = "negate"
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NOT_LITERAL = "not_literal"
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NOT_LITERAL_IGNORE = "not_literal_ignore"
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RANGE = "range"
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REPEAT = "repeat"
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REPEAT_ONE = "repeat_one"
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SUBPATTERN = "subpattern"
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MIN_REPEAT_ONE = "min_repeat_one"
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# positions
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AT_BEGINNING = "at_beginning"
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AT_BEGINNING_LINE = "at_beginning_line"
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AT_BEGINNING_STRING = "at_beginning_string"
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AT_BOUNDARY = "at_boundary"
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AT_NON_BOUNDARY = "at_non_boundary"
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AT_END = "at_end"
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AT_END_LINE = "at_end_line"
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AT_END_STRING = "at_end_string"
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AT_LOC_BOUNDARY = "at_loc_boundary"
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AT_LOC_NON_BOUNDARY = "at_loc_non_boundary"
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AT_UNI_BOUNDARY = "at_uni_boundary"
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AT_UNI_NON_BOUNDARY = "at_uni_non_boundary"
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# categories
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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_word"
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CATEGORY_NOT_WORD = "category_not_word"
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CATEGORY_LINEBREAK = "category_linebreak"
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CATEGORY_NOT_LINEBREAK = "category_not_linebreak"
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CATEGORY_LOC_WORD = "category_loc_word"
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CATEGORY_LOC_NOT_WORD = "category_loc_not_word"
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CATEGORY_UNI_DIGIT = "category_uni_digit"
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CATEGORY_UNI_NOT_DIGIT = "category_uni_not_digit"
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CATEGORY_UNI_SPACE = "category_uni_space"
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CATEGORY_UNI_NOT_SPACE = "category_uni_not_space"
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CATEGORY_UNI_WORD = "category_uni_word"
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CATEGORY_UNI_NOT_WORD = "category_uni_not_word"
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CATEGORY_UNI_LINEBREAK = "category_uni_linebreak"
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CATEGORY_UNI_NOT_LINEBREAK = "category_uni_not_linebreak"
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OPCODES = [
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# failure=0 success=1 (just because it looks better that way :-)
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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, GROUPREF_IGNORE,
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IN, IN_IGNORE,
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INFO,
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JUMP,
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LITERAL, LITERAL_IGNORE,
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MARK,
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MAX_UNTIL,
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MIN_UNTIL,
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NOT_LITERAL, NOT_LITERAL_IGNORE,
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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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]
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ATCODES = [
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AT_BEGINNING, AT_BEGINNING_LINE, AT_BEGINNING_STRING, AT_BOUNDARY,
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AT_NON_BOUNDARY, AT_END, AT_END_LINE, AT_END_STRING,
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AT_LOC_BOUNDARY, AT_LOC_NON_BOUNDARY, AT_UNI_BOUNDARY,
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AT_UNI_NON_BOUNDARY
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]
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CHCODES = [
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CATEGORY_DIGIT, CATEGORY_NOT_DIGIT, CATEGORY_SPACE,
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CATEGORY_NOT_SPACE, CATEGORY_WORD, CATEGORY_NOT_WORD,
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CATEGORY_LINEBREAK, CATEGORY_NOT_LINEBREAK, CATEGORY_LOC_WORD,
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CATEGORY_LOC_NOT_WORD, CATEGORY_UNI_DIGIT, CATEGORY_UNI_NOT_DIGIT,
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CATEGORY_UNI_SPACE, CATEGORY_UNI_NOT_SPACE, CATEGORY_UNI_WORD,
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CATEGORY_UNI_NOT_WORD, CATEGORY_UNI_LINEBREAK,
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CATEGORY_UNI_NOT_LINEBREAK
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]
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def makedict(list):
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d = {}
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i = 0
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for item in list:
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d[item] = i
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i = i + 1
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return d
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OPCODES = makedict(OPCODES)
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ATCODES = makedict(ATCODES)
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CHCODES = makedict(CHCODES)
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# replacement operations for "ignore case" mode
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OP_IGNORE = {
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GROUPREF: GROUPREF_IGNORE,
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IN: IN_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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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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# 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 = d.items()
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items.sort(key=lambda a: a[1])
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for k, v in items:
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f.write("#define %s_%s %s\n" % (prefix, k.upper(), v))
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f = open("sre_constants.h", "w")
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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_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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f.close()
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print "done"
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