Commit 1231274c authored by Andreas Jung's avatar Andreas Jung

- integrated Hotfix-2008-08-12

parent 8e34419c
################################################################
# Monkey patch for LP #257276 (Hotfix-2008-08-12)
#
# This code is taken from the encodings module of Python 2.4.
# Note that this code is originally (C) CNRI and it is possibly not compatible
# with the ZPL and therefore should not live within svn.zope.org. However this
# checkin is blessed by Jim Fulton for now. The fix is no longer required with
# Python 2.5 and hopefully fixed in Python 2.4.6 release.
################################################################
# Written by Marc-Andre Lemburg (mal@lemburg.com).
# (c) Copyright CNRI, All Rights Reserved. NO WARRANTY.
def search_function(encoding):
# Cache lookup
entry = _cache.get(encoding, _unknown)
if entry is not _unknown:
return entry
# Import the module:
#
# First try to find an alias for the normalized encoding
# name and lookup the module using the aliased name, then try to
# lookup the module using the standard import scheme, i.e. first
# try in the encodings package, then at top-level.
#
norm_encoding = normalize_encoding(encoding)
aliased_encoding = _aliases.get(norm_encoding) or \
_aliases.get(norm_encoding.replace('.', '_'))
if aliased_encoding is not None:
modnames = [aliased_encoding,
norm_encoding]
else:
modnames = [norm_encoding]
for modname in modnames:
if not modname or '.' in modname:
continue
try:
mod = __import__(modname,
globals(), locals(), _import_tail)
if not mod.__name__.startswith('encodings.'):
continue
except ImportError:
pass
else:
break
else:
mod = None
try:
getregentry = mod.getregentry
except AttributeError:
# Not a codec module
mod = None
if mod is None:
# Cache misses
_cache[encoding] = None
return None
# Now ask the module for the registry entry
entry = tuple(getregentry())
if len(entry) != 4:
raise CodecRegistryError,\
'module "%s" (%s) failed to register' % \
(mod.__name__, mod.__file__)
for obj in entry:
if not callable(obj):
raise CodecRegistryError,\
'incompatible codecs in module "%s" (%s)' % \
(mod.__name__, mod.__file__)
# Cache the codec registry entry
_cache[encoding] = entry
# Register its aliases (without overwriting previously registered
# aliases)
try:
codecaliases = mod.getaliases()
except AttributeError:
pass
else:
for alias in codecaliases:
if not _aliases.has_key(alias):
_aliases[alias] = modname
# Return the registry entry
return entry
import encodings
encodings.search_function.func_code = search_function.func_code
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