Merge p3yk branch with the trunk up to revision 45595. This breaks a fair

number of tests, all because of the codecs/_multibytecodecs issue described
here (it's not a Py3K issue, just something Py3K discovers):
http://mail.python.org/pipermail/python-dev/2006-April/064051.html

Hye-Shik Chang promised to look for a fix, so no need to fix it here. The
tests that are expected to break are:

test_codecencodings_cn
test_codecencodings_hk
test_codecencodings_jp
test_codecencodings_kr
test_codecencodings_tw
test_codecs
test_multibytecodec

This merge fixes an actual test failure (test_weakref) in this branch,
though, so I believe merging is the right thing to do anyway.

25 files changed, 635 insertions, 449 deletions

diff --git a/Lib/encodings/big5.py b/Lib/encodings/big5.py
index d56aa1b..7adeb0e 100644
--- a/Lib/encodings/big5.py
+++ b/Lib/encodings/big5.py
@@ -2,10 +2,10 @@
 # big5.py: Python Unicode Codec for BIG5
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: big5.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_tw, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_tw.getcodec('big5')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='big5',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/big5hkscs.py b/Lib/encodings/big5hkscs.py
index 443997f..350df37 100644
--- a/Lib/encodings/big5hkscs.py
+++ b/Lib/encodings/big5hkscs.py
@@ -2,10 +2,10 @@
 # big5hkscs.py: Python Unicode Codec for BIG5HKSCS
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: big5hkscs.py,v 1.1 2004/06/29 05:14:27 perky Exp $
 #
 
 import _codecs_hk, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_hk.getcodec('big5hkscs')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='big5hkscs',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/cp932.py b/Lib/encodings/cp932.py
index 38937f5..e01f59b 100644
--- a/Lib/encodings/cp932.py
+++ b/Lib/encodings/cp932.py
@@ -2,10 +2,10 @@
 # cp932.py: Python Unicode Codec for CP932
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: cp932.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('cp932')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='cp932',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/cp949.py b/Lib/encodings/cp949.py
index 0f3c847..627c871 100644
--- a/Lib/encodings/cp949.py
+++ b/Lib/encodings/cp949.py
@@ -2,10 +2,10 @@
 # cp949.py: Python Unicode Codec for CP949
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: cp949.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_kr, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_kr.getcodec('cp949')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='cp949',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/cp950.py b/Lib/encodings/cp950.py
index dab3e28..39eec5e 100644
--- a/Lib/encodings/cp950.py
+++ b/Lib/encodings/cp950.py
@@ -2,10 +2,10 @@
 # cp950.py: Python Unicode Codec for CP950
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: cp950.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_tw, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_tw.getcodec('cp950')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='cp950',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/euc_jis_2004.py b/Lib/encodings/euc_jis_2004.py
index 02d55ca..72b87aea 100644
--- a/Lib/encodings/euc_jis_2004.py
+++ b/Lib/encodings/euc_jis_2004.py
@@ -2,10 +2,10 @@
 # euc_jis_2004.py: Python Unicode Codec for EUC_JIS_2004
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: euc_jis_2004.py,v 1.1 2004/07/07 16:18:25 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('euc_jis_2004')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='euc_jis_2004',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/euc_jisx0213.py b/Lib/encodings/euc_jisx0213.py
index 30f173e..cc47d04 100644
--- a/Lib/encodings/euc_jisx0213.py
+++ b/Lib/encodings/euc_jisx0213.py
@@ -2,10 +2,10 @@
 # euc_jisx0213.py: Python Unicode Codec for EUC_JISX0213
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: euc_jisx0213.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('euc_jisx0213')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='euc_jisx0213',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/euc_jp.py b/Lib/encodings/euc_jp.py
index a3947a3..7bcbe41 100644
--- a/Lib/encodings/euc_jp.py
+++ b/Lib/encodings/euc_jp.py
@@ -2,10 +2,10 @@
 # euc_jp.py: Python Unicode Codec for EUC_JP
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: euc_jp.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('euc_jp')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='euc_jp',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/euc_kr.py b/Lib/encodings/euc_kr.py
index bbebee8..c1fb126 100644
--- a/Lib/encodings/euc_kr.py
+++ b/Lib/encodings/euc_kr.py
@@ -2,10 +2,10 @@
 # euc_kr.py: Python Unicode Codec for EUC_KR
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: euc_kr.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_kr, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_kr.getcodec('euc_kr')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='euc_kr',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/gb18030.py b/Lib/encodings/gb18030.py
index 7eca319..34fb6c3 100644
--- a/Lib/encodings/gb18030.py
+++ b/Lib/encodings/gb18030.py
@@ -2,10 +2,10 @@
 # gb18030.py: Python Unicode Codec for GB18030
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: gb18030.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_cn, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_cn.getcodec('gb18030')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='gb18030',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/gb2312.py b/Lib/encodings/gb2312.py
index 5130efa..3c3b837 100644
--- a/Lib/encodings/gb2312.py
+++ b/Lib/encodings/gb2312.py
@@ -2,10 +2,10 @@
 # gb2312.py: Python Unicode Codec for GB2312
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: gb2312.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_cn, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_cn.getcodec('gb2312')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='gb2312',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/gbk.py b/Lib/encodings/gbk.py
index 67854bc..1b45db8 100644
--- a/Lib/encodings/gbk.py
+++ b/Lib/encodings/gbk.py
@@ -2,10 +2,10 @@
 # gbk.py: Python Unicode Codec for GBK
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: gbk.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_cn, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_cn.getcodec('gbk')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='gbk',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/hz.py b/Lib/encodings/hz.py
index 3940894..383442a 100644
--- a/Lib/encodings/hz.py
+++ b/Lib/encodings/hz.py
@@ -2,10 +2,10 @@
 # hz.py: Python Unicode Codec for HZ
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: hz.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_cn, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_cn.getcodec('hz')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='hz',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/idna.py b/Lib/encodings/idna.py
index 8bdae32..ea90d67 100644
--- a/Lib/encodings/idna.py
+++ b/Lib/encodings/idna.py
@@ -35,7 +35,7 @@ def nameprep(label):
            stringprep.in_table_c7(c) or \
            stringprep.in_table_c8(c) or \
            stringprep.in_table_c9(c):
-            raise UnicodeError, "Invalid character %s" % repr(c)
+            raise UnicodeError("Invalid character %r" % c)
 
     # Check bidi
     RandAL = map(stringprep.in_table_d1, label)
@@ -48,14 +48,14 @@ def nameprep(label):
             # 2) If a string contains any RandALCat character, the string
             # MUST NOT contain any LCat character.
             if filter(stringprep.in_table_d2, label):
-                raise UnicodeError, "Violation of BIDI requirement 2"
+                raise UnicodeError("Violation of BIDI requirement 2")
 
             # 3) If a string contains any RandALCat character, a
             # RandALCat character MUST be the first character of the
             # string, and a RandALCat character MUST be the last
             # character of the string.
             if not RandAL[0] or not RandAL[-1]:
-                raise UnicodeError, "Violation of BIDI requirement 3"
+                raise UnicodeError("Violation of BIDI requirement 3")
 
     return label
 
@@ -70,7 +70,7 @@ def ToASCII(label):
         # Skip to step 8.
         if 0 < len(label) < 64:
             return label
-        raise UnicodeError, "label too long"
+        raise UnicodeError("label empty or too long")
 
     # Step 2: nameprep
     label = nameprep(label)
@@ -85,11 +85,11 @@ def ToASCII(label):
         # Skip to step 8.
         if 0 < len(label) < 64:
             return label
-        raise UnicodeError, "label too long"
+        raise UnicodeError("label empty or too long")
 
     # Step 5: Check ACE prefix
     if label.startswith(uace_prefix):
-        raise UnicodeError, "Label starts with ACE prefix"
+        raise UnicodeError("Label starts with ACE prefix")
 
     # Step 6: Encode with PUNYCODE
     label = label.encode("punycode")
@@ -100,7 +100,7 @@ def ToASCII(label):
     # Step 8: Check size
     if 0 < len(label) < 64:
         return label
-    raise UnicodeError, "label too long"
+    raise UnicodeError("label empty or too long")
 
 def ToUnicode(label):
     # Step 1: Check for ASCII
@@ -119,7 +119,7 @@ def ToUnicode(label):
         try:
             label = label.encode("ascii")
         except UnicodeError:
-            raise UnicodeError, "Invalid character in IDN label"
+            raise UnicodeError("Invalid character in IDN label")
     # Step 3: Check for ACE prefix
     if not label.startswith(ace_prefix):
         return unicode(label, "ascii")
@@ -136,7 +136,7 @@ def ToUnicode(label):
     # Step 7: Compare the result of step 6 with the one of step 3
     # label2 will already be in lower case.
     if label.lower() != label2:
-        raise UnicodeError, ("IDNA does not round-trip", label, label2)
+        raise UnicodeError("IDNA does not round-trip", label, label2)
 
     # Step 8: return the result of step 5
     return result
@@ -148,7 +148,7 @@ class Codec(codecs.Codec):
 
         if errors != 'strict':
             # IDNA is quite clear that implementations must be strict
-            raise UnicodeError, "unsupported error handling "+errors
+            raise UnicodeError("unsupported error handling "+errors)
 
         if not input:
             return "", 0
@@ -168,7 +168,7 @@ class Codec(codecs.Codec):
     def decode(self,input,errors='strict'):
 
         if errors != 'strict':
-            raise UnicodeError, "Unsupported error handling "+errors
+            raise UnicodeError("Unsupported error handling "+errors)
 
         if not input:
             return u"", 0
@@ -194,13 +194,79 @@ class Codec(codecs.Codec):
 
         return u".".join(result)+trailing_dot, len(input)
 
-class IncrementalEncoder(codecs.IncrementalEncoder):
-    def encode(self, input, final=False):
-        return Codec().encode(input, self.errors)[0]
+class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
+    def _buffer_encode(self, input, errors, final):
+        if errors != 'strict':
+            # IDNA is quite clear that implementations must be strict
+            raise UnicodeError("unsupported error handling "+errors)
+
+        if not input:
+            return ("", 0)
+
+        labels = dots.split(input)
+        trailing_dot = u''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = '.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = '.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(ToASCII(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        # Join with U+002E
+        result = ".".join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result, size)
+
+class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
+    def _buffer_decode(self, input, errors, final):
+        if errors != 'strict':
+            raise UnicodeError("Unsupported error handling "+errors)
+
+        if not input:
+            return (u"", 0)
+
+        # IDNA allows decoding to operate on Unicode strings, too.
+        if isinstance(input, unicode):
+            labels = dots.split(input)
+        else:
+            # Must be ASCII string
+            input = str(input)
+            unicode(input, "ascii")
+            labels = input.split(".")
+
+        trailing_dot = u''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = u'.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = u'.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(ToUnicode(label))
+            if size:
+                size += 1
+            size += len(label)
 
-class IncrementalDecoder(codecs.IncrementalDecoder):
-    def decode(self, input, final=False):
-        return Codec().decode(input, self.errors)[0]
+        result = u".".join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result, size)
 
 class StreamWriter(Codec,codecs.StreamWriter):
     pass
diff --git a/Lib/encodings/iso2022_jp.py b/Lib/encodings/iso2022_jp.py
index 109658b..ab04060 100644
--- a/Lib/encodings/iso2022_jp.py
+++ b/Lib/encodings/iso2022_jp.py
@@ -2,10 +2,10 @@
 # iso2022_jp.py: Python Unicode Codec for ISO2022_JP
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_jp.py,v 1.2 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_jp')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_jp',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/iso2022_jp_1.py b/Lib/encodings/iso2022_jp_1.py
index 201bd28..997044d 100644
--- a/Lib/encodings/iso2022_jp_1.py
+++ b/Lib/encodings/iso2022_jp_1.py
@@ -2,10 +2,10 @@
 # iso2022_jp_1.py: Python Unicode Codec for ISO2022_JP_1
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_jp_1.py,v 1.2 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_jp_1')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_jp_1',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/iso2022_jp_2.py b/Lib/encodings/iso2022_jp_2.py
index 7a61018..9106bf7 100644
--- a/Lib/encodings/iso2022_jp_2.py
+++ b/Lib/encodings/iso2022_jp_2.py
@@ -2,10 +2,10 @@
 # iso2022_jp_2.py: Python Unicode Codec for ISO2022_JP_2
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_jp_2.py,v 1.2 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_jp_2')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_jp_2',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/iso2022_jp_2004.py b/Lib/encodings/iso2022_jp_2004.py
index 2497124..40198bf 100644
--- a/Lib/encodings/iso2022_jp_2004.py
+++ b/Lib/encodings/iso2022_jp_2004.py
@@ -2,10 +2,10 @@
 # iso2022_jp_2004.py: Python Unicode Codec for ISO2022_JP_2004
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_jp_2004.py,v 1.1 2004/07/07 16:18:25 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_jp_2004')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_jp_2004',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/iso2022_jp_3.py b/Lib/encodings/iso2022_jp_3.py
index 8b2ed00..346e08b 100644
--- a/Lib/encodings/iso2022_jp_3.py
+++ b/Lib/encodings/iso2022_jp_3.py
@@ -2,10 +2,10 @@
 # iso2022_jp_3.py: Python Unicode Codec for ISO2022_JP_3
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_jp_3.py,v 1.2 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_jp_3')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_jp_3',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/iso2022_jp_ext.py b/Lib/encodings/iso2022_jp_ext.py
index 97cb4e7..752bab9 100644
--- a/Lib/encodings/iso2022_jp_ext.py
+++ b/Lib/encodings/iso2022_jp_ext.py
@@ -2,10 +2,10 @@
 # iso2022_jp_ext.py: Python Unicode Codec for ISO2022_JP_EXT
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_jp_ext.py,v 1.2 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_jp_ext')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_jp_ext',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/iso2022_kr.py b/Lib/encodings/iso2022_kr.py
index f5549ca..bf70187 100644
--- a/Lib/encodings/iso2022_kr.py
+++ b/Lib/encodings/iso2022_kr.py
@@ -2,10 +2,10 @@
 # iso2022_kr.py: Python Unicode Codec for ISO2022_KR
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: iso2022_kr.py,v 1.2 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_iso2022, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_iso2022.getcodec('iso2022_kr')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='iso2022_kr',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/johab.py b/Lib/encodings/johab.py
index b6a87d7..512aeeb 100644
--- a/Lib/encodings/johab.py
+++ b/Lib/encodings/johab.py
@@ -2,10 +2,10 @@
 # johab.py: Python Unicode Codec for JOHAB
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: johab.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_kr, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_kr.getcodec('johab')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='johab',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/shift_jis.py b/Lib/encodings/shift_jis.py
index ec5e517..8338117 100644
--- a/Lib/encodings/shift_jis.py
+++ b/Lib/encodings/shift_jis.py
@@ -2,10 +2,10 @@
 # shift_jis.py: Python Unicode Codec for SHIFT_JIS
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: shift_jis.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('shift_jis')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='shift_jis',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/shift_jis_2004.py b/Lib/encodings/shift_jis_2004.py
index 446cd7c..161b1e8 100644
--- a/Lib/encodings/shift_jis_2004.py
+++ b/Lib/encodings/shift_jis_2004.py
@@ -2,10 +2,10 @@
 # shift_jis_2004.py: Python Unicode Codec for SHIFT_JIS_2004
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: shift_jis_2004.py,v 1.1 2004/07/07 16:18:25 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('shift_jis_2004')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='shift_jis_2004',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )
diff --git a/Lib/encodings/shift_jisx0213.py b/Lib/encodings/shift_jisx0213.py
index 495468b..cb653f5 100644
--- a/Lib/encodings/shift_jisx0213.py
+++ b/Lib/encodings/shift_jisx0213.py
@@ -2,10 +2,10 @@
 # shift_jisx0213.py: Python Unicode Codec for SHIFT_JISX0213
 #
 # Written by Hye-Shik Chang <perky@FreeBSD.org>
-# $CJKCodecs: shift_jisx0213.py,v 1.8 2004/06/28 18:16:03 perky Exp $
 #
 
 import _codecs_jp, codecs
+import _multibytecodec as mbc
 
 codec = _codecs_jp.getcodec('shift_jisx0213')
 
@@ -13,22 +13,27 @@ class Codec(codecs.Codec):
     encode = codec.encode
     decode = codec.decode
 
-class StreamReader(Codec, codecs.StreamReader):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamReader.__init__(self, stream, errors)
-        __codec = codec.StreamReader(stream, errors)
-        self.read = __codec.read
-        self.readline = __codec.readline
-        self.readlines = __codec.readlines
-        self.reset = __codec.reset
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    def __init__(self, stream, errors='strict'):
-        codecs.StreamWriter.__init__(self, stream, errors)
-        __codec = codec.StreamWriter(stream, errors)
-        self.write = __codec.write
-        self.writelines = __codec.writelines
-        self.reset = __codec.reset
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
 
 def getregentry():
-    return (codec.encode, codec.decode, StreamReader, StreamWriter)
+    return codecs.CodecInfo(
+        name='shift_jisx0213',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )