Vega strike Python Modules doc  0.5.1
Documentation of the " Modules " folder of Vega strike
 All Data Structures Namespaces Files Functions Variables
sre_constants.py
Go to the documentation of this file.
1 #
2 # Secret Labs' Regular Expression Engine
3 #
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 
12 """Internal support module for sre"""
13 
14 # update when constants are added or removed
15 
16 MAGIC = 20010701
17 
18 # max code word in this release
19 
20 MAXREPEAT = 65535
21 
22 # SRE standard exception (access as sre.error)
23 # should this really be here?
24 
25 class error(Exception):
26  pass
27 
28 # operators
29 
30 FAILURE = "failure"
31 SUCCESS = "success"
32 
33 ANY = "any"
34 ANY_ALL = "any_all"
35 ASSERT = "assert"
36 ASSERT_NOT = "assert_not"
37 AT = "at"
38 BIGCHARSET = "bigcharset"
39 BRANCH = "branch"
40 CALL = "call"
41 CATEGORY = "category"
42 CHARSET = "charset"
43 GROUPREF = "groupref"
44 GROUPREF_IGNORE = "groupref_ignore"
45 IN = "in"
46 IN_IGNORE = "in_ignore"
47 INFO = "info"
48 JUMP = "jump"
49 LITERAL = "literal"
50 LITERAL_IGNORE = "literal_ignore"
51 MARK = "mark"
52 MAX_REPEAT = "max_repeat"
53 MAX_UNTIL = "max_until"
54 MIN_REPEAT = "min_repeat"
55 MIN_UNTIL = "min_until"
56 NEGATE = "negate"
57 NOT_LITERAL = "not_literal"
58 NOT_LITERAL_IGNORE = "not_literal_ignore"
59 RANGE = "range"
60 REPEAT = "repeat"
61 REPEAT_ONE = "repeat_one"
62 SUBPATTERN = "subpattern"
63 
64 # positions
65 AT_BEGINNING = "at_beginning"
66 AT_BEGINNING_LINE = "at_beginning_line"
67 AT_BEGINNING_STRING = "at_beginning_string"
68 AT_BOUNDARY = "at_boundary"
69 AT_NON_BOUNDARY = "at_non_boundary"
70 AT_END = "at_end"
71 AT_END_LINE = "at_end_line"
72 AT_END_STRING = "at_end_string"
73 AT_LOC_BOUNDARY = "at_loc_boundary"
74 AT_LOC_NON_BOUNDARY = "at_loc_non_boundary"
75 AT_UNI_BOUNDARY = "at_uni_boundary"
76 AT_UNI_NON_BOUNDARY = "at_uni_non_boundary"
77 
78 # categories
79 CATEGORY_DIGIT = "category_digit"
80 CATEGORY_NOT_DIGIT = "category_not_digit"
81 CATEGORY_SPACE = "category_space"
82 CATEGORY_NOT_SPACE = "category_not_space"
83 CATEGORY_WORD = "category_word"
84 CATEGORY_NOT_WORD = "category_not_word"
85 CATEGORY_LINEBREAK = "category_linebreak"
86 CATEGORY_NOT_LINEBREAK = "category_not_linebreak"
87 CATEGORY_LOC_WORD = "category_loc_word"
88 CATEGORY_LOC_NOT_WORD = "category_loc_not_word"
89 CATEGORY_UNI_DIGIT = "category_uni_digit"
90 CATEGORY_UNI_NOT_DIGIT = "category_uni_not_digit"
91 CATEGORY_UNI_SPACE = "category_uni_space"
92 CATEGORY_UNI_NOT_SPACE = "category_uni_not_space"
93 CATEGORY_UNI_WORD = "category_uni_word"
94 CATEGORY_UNI_NOT_WORD = "category_uni_not_word"
95 CATEGORY_UNI_LINEBREAK = "category_uni_linebreak"
96 CATEGORY_UNI_NOT_LINEBREAK = "category_uni_not_linebreak"
97 
98 OPCODES = [
99 
100  # failure=0 success=1 (just because it looks better that way :-)
101  FAILURE, SUCCESS,
102 
103  ANY, ANY_ALL,
104  ASSERT, ASSERT_NOT,
105  AT,
106  BRANCH,
107  CALL,
108  CATEGORY,
109  CHARSET, BIGCHARSET,
110  GROUPREF, GROUPREF_IGNORE,
111  IN, IN_IGNORE,
112  INFO,
113  JUMP,
114  LITERAL, LITERAL_IGNORE,
115  MARK,
116  MAX_UNTIL,
117  MIN_UNTIL,
118  NOT_LITERAL, NOT_LITERAL_IGNORE,
119  NEGATE,
120  RANGE,
121  REPEAT,
122  REPEAT_ONE,
123  SUBPATTERN
124 
125 ]
126 
127 ATCODES = [
128  AT_BEGINNING, AT_BEGINNING_LINE, AT_BEGINNING_STRING, AT_BOUNDARY,
129  AT_NON_BOUNDARY, AT_END, AT_END_LINE, AT_END_STRING,
130  AT_LOC_BOUNDARY, AT_LOC_NON_BOUNDARY, AT_UNI_BOUNDARY,
131  AT_UNI_NON_BOUNDARY
132 ]
133 
134 CHCODES = [
135  CATEGORY_DIGIT, CATEGORY_NOT_DIGIT, CATEGORY_SPACE,
136  CATEGORY_NOT_SPACE, CATEGORY_WORD, CATEGORY_NOT_WORD,
137  CATEGORY_LINEBREAK, CATEGORY_NOT_LINEBREAK, CATEGORY_LOC_WORD,
138  CATEGORY_LOC_NOT_WORD, CATEGORY_UNI_DIGIT, CATEGORY_UNI_NOT_DIGIT,
139  CATEGORY_UNI_SPACE, CATEGORY_UNI_NOT_SPACE, CATEGORY_UNI_WORD,
140  CATEGORY_UNI_NOT_WORD, CATEGORY_UNI_LINEBREAK,
141  CATEGORY_UNI_NOT_LINEBREAK
142 ]
143 
144 def makedict(list):
145  d = {}
146  i = 0
147  for item in list:
148  d[item] = i
149  i = i + 1
150  return d
151 
152 OPCODES = makedict(OPCODES)
153 ATCODES = makedict(ATCODES)
154 CHCODES = makedict(CHCODES)
155 
156 # replacement operations for "ignore case" mode
157 OP_IGNORE = {
158  GROUPREF: GROUPREF_IGNORE,
159  IN: IN_IGNORE,
160  LITERAL: LITERAL_IGNORE,
161  NOT_LITERAL: NOT_LITERAL_IGNORE
162 }
163 
164 AT_MULTILINE = {
165  AT_BEGINNING: AT_BEGINNING_LINE,
166  AT_END: AT_END_LINE
167 }
168 
169 AT_LOCALE = {
170  AT_BOUNDARY: AT_LOC_BOUNDARY,
171  AT_NON_BOUNDARY: AT_LOC_NON_BOUNDARY
172 }
173 
174 AT_UNICODE = {
175  AT_BOUNDARY: AT_UNI_BOUNDARY,
176  AT_NON_BOUNDARY: AT_UNI_NON_BOUNDARY
177 }
178 
179 CH_LOCALE = {
180  CATEGORY_DIGIT: CATEGORY_DIGIT,
181  CATEGORY_NOT_DIGIT: CATEGORY_NOT_DIGIT,
182  CATEGORY_SPACE: CATEGORY_SPACE,
183  CATEGORY_NOT_SPACE: CATEGORY_NOT_SPACE,
184  CATEGORY_WORD: CATEGORY_LOC_WORD,
185  CATEGORY_NOT_WORD: CATEGORY_LOC_NOT_WORD,
186  CATEGORY_LINEBREAK: CATEGORY_LINEBREAK,
187  CATEGORY_NOT_LINEBREAK: CATEGORY_NOT_LINEBREAK
188 }
189 
190 CH_UNICODE = {
191  CATEGORY_DIGIT: CATEGORY_UNI_DIGIT,
192  CATEGORY_NOT_DIGIT: CATEGORY_UNI_NOT_DIGIT,
193  CATEGORY_SPACE: CATEGORY_UNI_SPACE,
194  CATEGORY_NOT_SPACE: CATEGORY_UNI_NOT_SPACE,
195  CATEGORY_WORD: CATEGORY_UNI_WORD,
196  CATEGORY_NOT_WORD: CATEGORY_UNI_NOT_WORD,
197  CATEGORY_LINEBREAK: CATEGORY_UNI_LINEBREAK,
198  CATEGORY_NOT_LINEBREAK: CATEGORY_UNI_NOT_LINEBREAK
199 }
200 
201 # flags
202 SRE_FLAG_TEMPLATE = 1 # template mode (disable backtracking)
203 SRE_FLAG_IGNORECASE = 2 # case insensitive
204 SRE_FLAG_LOCALE = 4 # honour system locale
205 SRE_FLAG_MULTILINE = 8 # treat target as multiline string
206 SRE_FLAG_DOTALL = 16 # treat target as a single string
207 SRE_FLAG_UNICODE = 32 # use unicode locale
208 SRE_FLAG_VERBOSE = 64 # ignore whitespace and comments
209 SRE_FLAG_DEBUG = 128 # debugging
210 
211 # flags for INFO primitive
212 SRE_INFO_PREFIX = 1 # has prefix
213 SRE_INFO_LITERAL = 2 # entire pattern is literal (given by prefix)
214 SRE_INFO_CHARSET = 4 # pattern starts with character from given set
215 
216 if __name__ == "__main__":
217  import string
218  def dump(f, d, prefix):
219  items = d.items()
220  items.sort(lambda a, b: cmp(a[1], b[1]))
221  for k, v in items:
222  f.write("#define %s_%s %s\n" % (prefix, string.upper(k), v))
223  f = open("sre_constants.h", "w")
224  f.write("""\
225 /*
226  * Secret Labs' Regular Expression Engine
227  *
228  * regular expression matching engine
229  *
230  * NOTE: This file is generated by sre_constants.py. If you need
231  * to change anything in here, edit sre_constants.py and run it.
232  *
233  * Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.
234  *
235  * See the _sre.c file for information on usage and redistribution.
236  */
237 
238 """)
239 
240  f.write("#define SRE_MAGIC %d\n" % MAGIC)
241 
242  dump(f, OPCODES, "SRE_OP")
243  dump(f, ATCODES, "SRE")
244  dump(f, CHCODES, "SRE")
245 
246  f.write("#define SRE_FLAG_TEMPLATE %d\n" % SRE_FLAG_TEMPLATE)
247  f.write("#define SRE_FLAG_IGNORECASE %d\n" % SRE_FLAG_IGNORECASE)
248  f.write("#define SRE_FLAG_LOCALE %d\n" % SRE_FLAG_LOCALE)
249  f.write("#define SRE_FLAG_MULTILINE %d\n" % SRE_FLAG_MULTILINE)
250  f.write("#define SRE_FLAG_DOTALL %d\n" % SRE_FLAG_DOTALL)
251  f.write("#define SRE_FLAG_UNICODE %d\n" % SRE_FLAG_UNICODE)
252  f.write("#define SRE_FLAG_VERBOSE %d\n" % SRE_FLAG_VERBOSE)
253 
254  f.write("#define SRE_INFO_PREFIX %d\n" % SRE_INFO_PREFIX)
255  f.write("#define SRE_INFO_LITERAL %d\n" % SRE_INFO_LITERAL)
256  f.write("#define SRE_INFO_CHARSET %d\n" % SRE_INFO_CHARSET)
257 
258  f.close()
259  print "done"