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##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# 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.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# 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.
#
#
# 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
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