wxPython/samples/stxview/StructuredText/ts_regex.py

   1 ##############################################################################
   2 #
   3 # Zope Public License (ZPL) Version 1.0
   4 # -------------------------------------
   5 #
   6 # Copyright (c) Digital Creations.  All rights reserved.
   7 #
   8 # This license has been certified as Open Source(tm).
   9 #
  10 # Redistribution and use in source and binary forms, with or without
  11 # modification, are permitted provided that the following conditions are
  12 # met:
  13 #
  14 # 1. Redistributions in source code must retain the above copyright
  15 #    notice, this list of conditions, and the following disclaimer.
  16 #
  17 # 2. Redistributions in binary form must reproduce the above copyright
  18 #    notice, this list of conditions, and the following disclaimer in
  19 #    the documentation and/or other materials provided with the
  20 #    distribution.
  21 #
  22 # 3. Digital Creations requests that attribution be given to Zope
  23 #    in any manner possible. Zope includes a "Powered by Zope"
  24 #    button that is installed by default. While it is not a license
  25 #    violation to remove this button, it is requested that the
  26 #    attribution remain. A significant investment has been put
  27 #    into Zope, and this effort will continue if the Zope community
  28 #    continues to grow. This is one way to assure that growth.
  29 #
  30 # 4. All advertising materials and documentation mentioning
  31 #    features derived from or use of this software must display
  32 #    the following acknowledgement:
  33 #
  34 #      "This product includes software developed by Digital Creations
  35 #      for use in the Z Object Publishing Environment
  36 #      (http://www.zope.org/)."
  37 #
  38 #    In the event that the product being advertised includes an
  39 #    intact Zope distribution (with copyright and license included)
  40 #    then this clause is waived.
  41 #
  42 # 5. Names associated with Zope or Digital Creations must not be used to
  43 #    endorse or promote products derived from this software without
  44 #    prior written permission from Digital Creations.
  45 #
  46 # 6. Modified redistributions of any form whatsoever must retain
  47 #    the following acknowledgment:
  48 #
  49 #      "This product includes software developed by Digital Creations
  50 #      for use in the Z Object Publishing Environment
  51 #      (http://www.zope.org/)."
  52 #
  53 #    Intact (re-)distributions of any official Zope release do not
  54 #    require an external acknowledgement.
  55 #
  56 # 7. Modifications are encouraged but must be packaged separately as
  57 #    patches to official Zope releases.  Distributions that do not
  58 #    clearly separate the patches from the original work must be clearly
  59 #    labeled as unofficial distributions.  Modifications which do not
  60 #    carry the name Zope may be packaged in any form, as long as they
  61 #    conform to all of the clauses above.
  62 #
  63 #
  64 # Disclaimer
  65 #
  66 #   THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
  67 #   EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  68 #   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  69 #   PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
  70 #   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  71 #   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  72 #   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  73 #   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  74 #   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  75 #   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  76 #   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  77 #   SUCH DAMAGE.
  78 #
  79 #
  80 # This software consists of contributions made by Digital Creations and
  81 # many individuals on behalf of Digital Creations.  Specific
  82 # attributions are listed in the accompanying credits file.
  83 #
  84 ##############################################################################
  85 """Provide a thread-safe interface to regex
  86 """
  87 import regex, regsub #, Sync
  88 from regex import *
  89 from regsub import split, sub, gsub, splitx, capwords
  90
  91 try:
  92     import thread
  93 except:
  94     class allocate_lock:
  95         def acquire(*args): pass
  96         def release(*args): pass
  97
  98 else:
  99     class SafeFunction:
 100         _l=thread.allocate_lock()
 101         _a=_l.acquire
 102         _r=_l.release
 103
 104         def __init__(self, f):
 105             self._f=f
 106
 107         def __call__(self, *args, **kw):
 108             self._a()
 109             try: return apply(self._f, args, kw)
 110             finally: self._r()
 111
 112     split=SafeFunction(split)
 113     sub=SafeFunction(sub)
 114     gsub=SafeFunction(gsub)
 115     splitx=SafeFunction(splitx)
 116     capwords=SafeFunction(capwords)
 117
 118     allocate_lock=thread.allocate_lock
 119
 120 class compile:
 121
 122     _r=None
 123     groupindex=None
 124
 125     def __init__(self, *args):
 126         self._r=r=apply(regex.compile,args)
 127         self._init(r)
 128
 129     def _init(self, r):
 130         lock=allocate_lock()
 131         self.__a=lock.acquire
 132         self.__r=lock.release
 133         self.translate=r.translate
 134         self.givenpat=r.givenpat
 135         self.realpat=r.realpat
 136
 137     def match(self, string, pos=0):
 138         self.__a()
 139         try: return self._r.match(string, pos)
 140         finally: self.__r()
 141
 142     def search(self, string, pos=0):
 143         self.__a()
 144         try: return self._r.search(string, pos)
 145         finally: self.__r()
 146
 147     def search_group(self, str, group, pos=0):
 148         """Search a string for a pattern.
 149
 150         If the pattern was not found, then None is returned,
 151         otherwise, the location where the pattern was found,
 152         as well as any specified group are returned.
 153         """
 154         self.__a()
 155         try:
 156             r=self._r
 157             l=r.search(str, pos)
 158             if l < 0: return None
 159             return l, apply(r.group, group)
 160         finally: self.__r()
 161
 162     def match_group(self, str, group, pos=0):
 163         """Match a pattern against a string
 164
 165         If the string does not match the pattern, then None is
 166         returned, otherwise, the length of the match, as well
 167         as any specified group are returned.
 168         """
 169         self.__a()
 170         try:
 171             r=self._r
 172             l=r.match(str, pos)
 173             if l < 0: return None
 174             return l, apply(r.group, group)
 175         finally: self.__r()
 176
 177     def search_regs(self, str, pos=0):
 178         """Search a string for a pattern.
 179
 180         If the pattern was not found, then None is returned,
 181         otherwise, the 'regs' attribute of the expression is
 182         returned.
 183         """
 184         self.__a()
 185         try:
 186             r=self._r
 187             r.search(str, pos)
 188             return r.regs
 189         finally: self.__r()
 190
 191     def match_regs(self, str, pos=0):
 192         """Match a pattern against a string
 193
 194         If the string does not match the pattern, then None is
 195         returned, otherwise, the 'regs' attribute of the expression is
 196         returned.
 197         """
 198         self.__a()
 199         try:
 200             r=self._r
 201             r.match(str, pos)
 202             return r.regs
 203         finally: self.__r()
 204
 205 class symcomp(compile):
 206
 207     def __init__(self, *args):
 208         self._r=r=apply(regex.symcomp,args)
 209         self._init(r)
 210         self.groupindex=r.groupindex
 211
 212
 213
 214
 215