ts_regex.py
上传用户:gyjinxi
上传日期:2007-01-04
资源大小:159k
文件大小:7k
- ##############################################################################
- #
- # Zope Public License (ZPL) Version 1.0
- # -------------------------------------
- #
- # Copyright (c) Digital Creations. All rights reserved.
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- # This license has been certified as Open Source(tm).
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- # Redistribution and use in source and binary forms, with or without
- # modification, are permitted provided that the following conditions are
- # met:
- #
- # 1. Redistributions in source code must retain the above copyright
- # notice, this list of conditions, and the following disclaimer.
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- # 2. Redistributions in binary form must reproduce the above copyright
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- # the documentation and/or other materials provided with the
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- # THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
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- # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- # SUCH DAMAGE.
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- # This software consists of contributions made by Digital Creations and
- # many individuals on behalf of Digital Creations. Specific
- # attributions are listed in the accompanying credits file.
- #
- ##############################################################################
- """Provide a thread-safe interface to regex
- """
- import regex, regsub #, Sync
- from regex import *
- from regsub import split, sub, gsub, splitx, capwords
- try:
- import thread
- except:
- class allocate_lock:
- def acquire(*args): pass
- def release(*args): pass
- else:
- class SafeFunction:
- _l=thread.allocate_lock()
- _a=_l.acquire
- _r=_l.release
- def __init__(self, f):
- self._f=f
- def __call__(self, *args, **kw):
- self._a()
- try: return apply(self._f, args, kw)
- finally: self._r()
- split=SafeFunction(split)
- sub=SafeFunction(sub)
- gsub=SafeFunction(gsub)
- splitx=SafeFunction(splitx)
- capwords=SafeFunction(capwords)
- allocate_lock=thread.allocate_lock
- class compile:
- _r=None
- groupindex=None
- def __init__(self, *args):
- self._r=r=apply(regex.compile,args)
- self._init(r)
- def _init(self, r):
- lock=allocate_lock()
- self.__a=lock.acquire
- self.__r=lock.release
- self.translate=r.translate
- self.givenpat=r.givenpat
- self.realpat=r.realpat
- def match(self, string, pos=0):
- self.__a()
- try: return self._r.match(string, pos)
- finally: self.__r()
- def search(self, string, pos=0):
- self.__a()
- try: return self._r.search(string, pos)
- finally: self.__r()
-
- def search_group(self, str, group, pos=0):
- """Search a string for a pattern.
- If the pattern was not found, then None is returned,
- otherwise, the location where the pattern was found,
- as well as any specified group are returned.
- """
- self.__a()
- try:
- r=self._r
- l=r.search(str, pos)
- if l < 0: return None
- return l, apply(r.group, group)
- finally: self.__r()
- def match_group(self, str, group, pos=0):
- """Match a pattern against a string
- If the string does not match the pattern, then None is
- returned, otherwise, the length of the match, as well
- as any specified group are returned.
- """
- self.__a()
- try:
- r=self._r
- l=r.match(str, pos)
- if l < 0: return None
- return l, apply(r.group, group)
- finally: self.__r()
- def search_regs(self, str, pos=0):
- """Search a string for a pattern.
- If the pattern was not found, then None is returned,
- otherwise, the 'regs' attribute of the expression is
- returned.
- """
- self.__a()
- try:
- r=self._r
- r.search(str, pos)
- return r.regs
- finally: self.__r()
- def match_regs(self, str, pos=0):
- """Match a pattern against a string
- If the string does not match the pattern, then None is
- returned, otherwise, the 'regs' attribute of the expression is
- returned.
- """
- self.__a()
- try:
- r=self._r
- r.match(str, pos)
- return r.regs
- finally: self.__r()
- class symcomp(compile):
- def __init__(self, *args):
- self._r=r=apply(regex.symcomp,args)
- self._init(r)
- self.groupindex=r.groupindex
-