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sre_constants.py
Source:sre_constants.py 
1#2# Secret Labs' Regular Expression Engine3#4# various symbols used by the regular expression engine.5# run this script to update the _sre include files!6#7# Copyright (c) 1998-2001 by Secret Labs AB. All rights reserved.8#9# See the sre.py file for information on usage and redistribution.10#11"""Internal support module for sre"""12# update when constants are added or removed13MAGIC = 2003101714# max code word in this release15MAXREPEAT = 6553516# SRE standard exception (access as sre.error)17# should this really be here?18class error(Exception):19 pass20# operators21FAILURE = "failure"22SUCCESS = "success"23ANY = "any"24ANY_ALL = "any_all"25ASSERT = "assert"26ASSERT_NOT = "assert_not"27AT = "at"28BIGCHARSET = "bigcharset"29BRANCH = "branch"30CALL = "call"31CATEGORY = "category"32CHARSET = "charset"33GROUPREF = "groupref"34GROUPREF_IGNORE = "groupref_ignore"35GROUPREF_EXISTS = "groupref_exists"36IN = "in"37IN_IGNORE = "in_ignore"38INFO = "info"39JUMP = "jump"40LITERAL = "literal"41LITERAL_IGNORE = "literal_ignore"42MARK = "mark"43MAX_REPEAT = "max_repeat"44MAX_UNTIL = "max_until"45MIN_REPEAT = "min_repeat"46MIN_UNTIL = "min_until"47NEGATE = "negate"48NOT_LITERAL = "not_literal"49NOT_LITERAL_IGNORE = "not_literal_ignore"50RANGE = "range"51REPEAT = "repeat"52REPEAT_ONE = "repeat_one"53SUBPATTERN = "subpattern"54MIN_REPEAT_ONE = "min_repeat_one"55# positions56AT_BEGINNING = "at_beginning"57AT_BEGINNING_LINE = "at_beginning_line"58AT_BEGINNING_STRING = "at_beginning_string"59AT_BOUNDARY = "at_boundary"60AT_NON_BOUNDARY = "at_non_boundary"61AT_END = "at_end"62AT_END_LINE = "at_end_line"63AT_END_STRING = "at_end_string"64AT_LOC_BOUNDARY = "at_loc_boundary"65AT_LOC_NON_BOUNDARY = "at_loc_non_boundary"66AT_UNI_BOUNDARY = "at_uni_boundary"67AT_UNI_NON_BOUNDARY = "at_uni_non_boundary"68# categories69CATEGORY_DIGIT = "category_digit"70CATEGORY_NOT_DIGIT = "category_not_digit"71CATEGORY_SPACE = "category_space"72CATEGORY_NOT_SPACE = "category_not_space"73CATEGORY_WORD = "category_word"74CATEGORY_NOT_WORD = "category_not_word"75CATEGORY_LINEBREAK = "category_linebreak"76CATEGORY_NOT_LINEBREAK = "category_not_linebreak"77CATEGORY_LOC_WORD = "category_loc_word"78CATEGORY_LOC_NOT_WORD = "category_loc_not_word"79CATEGORY_UNI_DIGIT = "category_uni_digit"80CATEGORY_UNI_NOT_DIGIT = "category_uni_not_digit"81CATEGORY_UNI_SPACE = "category_uni_space"82CATEGORY_UNI_NOT_SPACE = "category_uni_not_space"83CATEGORY_UNI_WORD = "category_uni_word"84CATEGORY_UNI_NOT_WORD = "category_uni_not_word"85CATEGORY_UNI_LINEBREAK = "category_uni_linebreak"86CATEGORY_UNI_NOT_LINEBREAK = "category_uni_not_linebreak"87OPCODES = [88 # failure=0 success=1 (just because it looks better that way :-)89 FAILURE, SUCCESS,90 ANY, ANY_ALL,91 ASSERT, ASSERT_NOT,92 AT,93 BRANCH,94 CALL,95 CATEGORY,96 CHARSET, BIGCHARSET,97 GROUPREF, GROUPREF_EXISTS, GROUPREF_IGNORE,98 IN, IN_IGNORE,99 INFO,100 JUMP,101 LITERAL, LITERAL_IGNORE,102 MARK,103 MAX_UNTIL,104 MIN_UNTIL,105 NOT_LITERAL, NOT_LITERAL_IGNORE,106 NEGATE,107 RANGE,108 REPEAT,109 REPEAT_ONE,110 SUBPATTERN,111 MIN_REPEAT_ONE112]113ATCODES = [114 AT_BEGINNING, AT_BEGINNING_LINE, AT_BEGINNING_STRING, AT_BOUNDARY,115 AT_NON_BOUNDARY, AT_END, AT_END_LINE, AT_END_STRING,116 AT_LOC_BOUNDARY, AT_LOC_NON_BOUNDARY, AT_UNI_BOUNDARY,117 AT_UNI_NON_BOUNDARY118]119CHCODES = [120 CATEGORY_DIGIT, CATEGORY_NOT_DIGIT, CATEGORY_SPACE,121 CATEGORY_NOT_SPACE, CATEGORY_WORD, CATEGORY_NOT_WORD,122 CATEGORY_LINEBREAK, CATEGORY_NOT_LINEBREAK, CATEGORY_LOC_WORD,123 CATEGORY_LOC_NOT_WORD, CATEGORY_UNI_DIGIT, CATEGORY_UNI_NOT_DIGIT,124 CATEGORY_UNI_SPACE, CATEGORY_UNI_NOT_SPACE, CATEGORY_UNI_WORD,125 CATEGORY_UNI_NOT_WORD, CATEGORY_UNI_LINEBREAK,126 CATEGORY_UNI_NOT_LINEBREAK127]128def makedict(list):129 d = {}130 i = 0131 for item in list:132 d[item] = i133 i = i + 1134 return d135OPCODES = makedict(OPCODES)136ATCODES = makedict(ATCODES)137CHCODES = makedict(CHCODES)138# replacement operations for "ignore case" mode139OP_IGNORE = {140 GROUPREF: GROUPREF_IGNORE,141 IN: IN_IGNORE,142 LITERAL: LITERAL_IGNORE,143 NOT_LITERAL: NOT_LITERAL_IGNORE144}145AT_MULTILINE = {146 AT_BEGINNING: AT_BEGINNING_LINE,147 AT_END: AT_END_LINE148}149AT_LOCALE = {150 AT_BOUNDARY: AT_LOC_BOUNDARY,151 AT_NON_BOUNDARY: AT_LOC_NON_BOUNDARY152}153AT_UNICODE = {154 AT_BOUNDARY: AT_UNI_BOUNDARY,155 AT_NON_BOUNDARY: AT_UNI_NON_BOUNDARY156}157CH_LOCALE = {158 CATEGORY_DIGIT: CATEGORY_DIGIT,159 CATEGORY_NOT_DIGIT: CATEGORY_NOT_DIGIT,160 CATEGORY_SPACE: CATEGORY_SPACE,161 CATEGORY_NOT_SPACE: CATEGORY_NOT_SPACE,162 CATEGORY_WORD: CATEGORY_LOC_WORD,163 CATEGORY_NOT_WORD: CATEGORY_LOC_NOT_WORD,164 CATEGORY_LINEBREAK: CATEGORY_LINEBREAK,165 CATEGORY_NOT_LINEBREAK: CATEGORY_NOT_LINEBREAK166}167CH_UNICODE = {168 CATEGORY_DIGIT: CATEGORY_UNI_DIGIT,169 CATEGORY_NOT_DIGIT: CATEGORY_UNI_NOT_DIGIT,170 CATEGORY_SPACE: CATEGORY_UNI_SPACE,171 CATEGORY_NOT_SPACE: CATEGORY_UNI_NOT_SPACE,172 CATEGORY_WORD: CATEGORY_UNI_WORD,173 CATEGORY_NOT_WORD: CATEGORY_UNI_NOT_WORD,174 CATEGORY_LINEBREAK: CATEGORY_UNI_LINEBREAK,175 CATEGORY_NOT_LINEBREAK: CATEGORY_UNI_NOT_LINEBREAK176}177# flags178SRE_FLAG_TEMPLATE = 1 # template mode (disable backtracking)179SRE_FLAG_IGNORECASE = 2 # case insensitive180SRE_FLAG_LOCALE = 4 # honour system locale181SRE_FLAG_MULTILINE = 8 # treat target as multiline string182SRE_FLAG_DOTALL = 16 # treat target as a single string183SRE_FLAG_UNICODE = 32 # use unicode locale184SRE_FLAG_VERBOSE = 64 # ignore whitespace and comments185SRE_FLAG_DEBUG = 128 # debugging186# flags for INFO primitive187SRE_INFO_PREFIX = 1 # has prefix188SRE_INFO_LITERAL = 2 # entire pattern is literal (given by prefix)189SRE_INFO_CHARSET = 4 # pattern starts with character from given set190if __name__ == "__main__":191 def dump(f, d, prefix):192 items = d.items()193 items.sort(key=lambda a: a[1])194 for k, v in items:195 f.write("#define %s_%s %s\n" % (prefix, k.upper(), v))196 f = open("sre_constants.h", "w")197 f.write("""\198/*199 * Secret Labs' Regular Expression Engine200 *201 * regular expression matching engine202 *203 * NOTE: This file is generated by sre_constants.py. If you need204 * to change anything in here, edit sre_constants.py and run it.205 *206 * Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.207 *208 * See the _sre.c file for information on usage and redistribution.209 */210""")211 f.write("#define SRE_MAGIC %d\n" % MAGIC)212 dump(f, OPCODES, "SRE_OP")213 dump(f, ATCODES, "SRE")214 dump(f, CHCODES, "SRE")215 f.write("#define SRE_FLAG_TEMPLATE %d\n" % SRE_FLAG_TEMPLATE)216 f.write("#define SRE_FLAG_IGNORECASE %d\n" % SRE_FLAG_IGNORECASE)217 f.write("#define SRE_FLAG_LOCALE %d\n" % SRE_FLAG_LOCALE)218 f.write("#define SRE_FLAG_MULTILINE %d\n" % SRE_FLAG_MULTILINE)219 f.write("#define SRE_FLAG_DOTALL %d\n" % SRE_FLAG_DOTALL)220 f.write("#define SRE_FLAG_UNICODE %d\n" % SRE_FLAG_UNICODE)221 f.write("#define SRE_FLAG_VERBOSE %d\n" % SRE_FLAG_VERBOSE)222 f.write("#define SRE_INFO_PREFIX %d\n" % SRE_INFO_PREFIX)223 f.write("#define SRE_INFO_LITERAL %d\n" % SRE_INFO_LITERAL)224 f.write("#define SRE_INFO_CHARSET %d\n" % SRE_INFO_CHARSET)225 f.close()...
test_lexer.py
Source:test_lexer.py
1from pugsql import lexer, context2from unittest import TestCase3ctx = context.Context('<literal>')4def at(line, col):5 return context.Context(ctx.sqlfile, line, col)6class LexTest(TestCase):7 def test_basic(self):8 l1 = lexer.Token('C', '-- :name username_for_id :1', at(1, 1))9 l2 = lexer.Token(10 'Q', 'select username from users where user_id = :user_id',11 at(2, 1))12 self.assertEqual(13 [l1, l2],14 lexer.lex(open('tests/sql/basic.sql', 'r').read(), ctx))15 def test_leading_comment_whitespace(self):16 l1 = lexer.Token('C', '-- :name username_for_id :1', at(1, 4))17 l2 = lexer.Token(18 'Q', 'select username from users where user_id = :user_id',19 at(2, 1))20 self.assertEqual(21 [l1, l2],22 lexer.lex(23 ' -- :name username_for_id :1\n'24 'select username from users where user_id = :user_id', ctx))25 def test_whitespace(self):26 l1 = lexer.Token('C', '-- :name username_for_id :1', at(1, 2))27 l2 = lexer.Token(28 'Q', 'select username from users where user_id = :user_id',29 at(2, 2))30 self.assertEqual(31 [l1, l2],32 lexer.lex(33 ' -- :name username_for_id :1 \n'34 ' select username from users where user_id = :user_id ', ctx))35 def test_blank_lines(self):36 l1 = lexer.Token('C', '-- :name username_for_id :1', at(1, 1))37 l2 = lexer.Token('Q', '', at(2, 1))38 l3 = lexer.Token(39 'Q', 'select username from users where user_id = :user_id',40 at(3, 1))41 self.assertEqual(42 [l1, l2, l3],43 lexer.lex(44 '-- :name username_for_id :1 \n'45 '\n'46 'select username from users where user_id = :user_id ', ctx))47class LexCommentTest(TestCase):48 def tok(self, comment):49 return lexer.Token('C', comment, at(1, 1))50 def test_no_keywords(self):51 self.assertIsNone(lexer.lex_comment(self.tok('-- foobar baz')))52 def test_not_a_comment(self):53 self.assertIsNone(lexer.lex_comment(self.tok('select 1')))54 def test_internal_keyword(self):55 self.assertIsNone(lexer.lex_comment(self.tok('-- stuff :foo bar')))56 def test_works(self):57 self.assertEqual({58 'keyword': lexer.Token('K', ':foo', at(1, 4)),59 'rest': lexer.Token('S', 'bar baz', at(1, 9)),60 }, lexer.lex_comment(self.tok('-- :foo bar baz')))61 def test_multiple_keywords(self):62 self.assertEqual({63 'keyword': lexer.Token('K', ':foo', at(1, 4)),64 'rest': lexer.Token('S', 'bar :baz', at(1, 9)),65 }, lexer.lex_comment(self.tok('-- :foo bar :baz')))66 def test_leading_whitespace(self):67 self.assertEqual({68 'keyword': lexer.Token('K', ':foo', at(1, 9)),69 'rest': lexer.Token('S', 'bar :baz', at(1, 14)),70 }, lexer.lex_comment(self.tok('-- :foo bar :baz')))71 def test_internal_whitespace(self):72 self.assertEqual({73 'keyword': lexer.Token('K', ':foo', at(1, 5)),74 'rest': lexer.Token('S', 'bar :baz', at(1, 12)),75 }, lexer.lex_comment(self.tok('-- :foo bar :baz')))76 def test_keyword_only(self):77 self.assertEqual({78 'keyword': lexer.Token('K', ':foo', at(1, 4)),79 'rest': lexer.Token('S', '', at(1, 8)),80 }, lexer.lex_comment(self.tok('-- :foo')))81 def test_no_space(self):82 self.assertEqual({83 'keyword': lexer.Token('K', ':foo', at(1, 3)),84 'rest': lexer.Token('S', '', at(1, 7)),85 }, lexer.lex_comment(self.tok('--:foo')))86class LexNameTest(TestCase):87 def tok(self, rest):88 return lexer.Token('S', rest, at(1, 1))89 def test_name_only(self):90 self.assertEqual({91 'name': lexer.Token('N', 'foo', at(1, 1)),92 'keyword': lexer.Token('K', None, at(1, 4)),93 'rest': lexer.Token('S', None, at(1, 4)),94 }, lexer.lex_name(self.tok('foo')))95 def test_name_rest_no_keyword(self):96 self.assertEqual({97 'name': lexer.Token('N', 'foo', at(1, 1)),98 'keyword': lexer.Token('K', None, at(1, 5)),99 'rest': lexer.Token('S', 'other stuff', at(1, 5)),100 }, lexer.lex_name(self.tok('foo other stuff')))101 def test_with_keyword(self):102 self.assertEqual({103 'name': lexer.Token('N', 'foo', at(1, 1)),104 'keyword': lexer.Token('K', ':bar', at(1, 5)),105 'rest': lexer.Token('S', None, at(1, 9)),106 }, lexer.lex_name(self.tok('foo :bar')))107 def test_with_rest(self):108 self.assertEqual({109 'name': lexer.Token('N', 'foo', at(1, 1)),110 'keyword': lexer.Token('K', ':bar', at(1, 5)),111 'rest': lexer.Token('S', 'other stuff', at(1, 10)),112 }, lexer.lex_name(self.tok('foo :bar other stuff')))113 def test_leading_whitespace(self):114 self.assertEqual({115 'name': lexer.Token('N', 'foo', at(1, 4)),116 'keyword': lexer.Token('K', ':bar', at(1, 8)),117 'rest': lexer.Token('S', 'other stuff', at(1, 13)),118 }, lexer.lex_name(self.tok(' foo :bar other stuff')))119 def test_trailing_whitespace(self):120 self.assertEqual({121 'name': lexer.Token('N', 'foo', at(1, 4)),122 'keyword': lexer.Token('K', ':bar', at(1, 8)),123 'rest': lexer.Token('S', 'other stuff', at(1, 13)),124 }, lexer.lex_name(self.tok(' foo :bar other stuff ')))125 def test_name_only_trailing_whitespace(self):126 self.assertEqual({127 'name': lexer.Token('N', 'foo', at(1, 1)),128 'keyword': lexer.Token('K', None, at(1, 4)),129 'rest': lexer.Token('S', None, at(1, 4)),130 }, lexer.lex_name(self.tok('foo ')))131 def test_with_keyword_trailing_whitespace(self):132 self.assertEqual({133 'name': lexer.Token('N', 'foo', at(1, 1)),134 'keyword': lexer.Token('K', ':bar', at(1, 5)),135 'rest': lexer.Token('S', None, at(1, 9)),136 }, lexer.lex_name(self.tok('foo :bar ')))137 def test_no_name(self):138 self.assertIsNone(lexer.lex_name(self.tok(' ')))139 def test_empty(self):140 self.assertIsNone(lexer.lex_name(self.tok('')))141class LexResultTest(TestCase):142 def tok(self, s):143 return lexer.Token('S', s, at(1, 1))144 def test_works(self):145 self.assertEqual({146 'keyword': lexer.Token('K', ':raw', at(1, 1)),147 'rest': lexer.Token('S', None, at(1, 5)),148 }, lexer.lex_result(self.tok(':raw')))149 def test_rest(self):150 self.assertEqual({151 'keyword': lexer.Token('K', ':raw', at(1, 1)),152 'rest': lexer.Token('S', ' stuff', at(1, 5)),153 }, lexer.lex_result(self.tok(':raw stuff')))154 def test_no_keyword(self):...
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