Merge part of the trunk changes into the p3yk branch. This merges from 43030
(branch-creation time) up to 43067. 43068 and 43069 contain a little
swapping action between re.py and sre.py, and this mightily confuses svn
merge, so later changes are going in separately.

This merge should break no additional tests.

The last-merged revision is going in a 'last_merge' property on '.' (the
branch directory.) Arbitrarily chosen, really; if there's a BCP for this, I
couldn't find it, but we can easily change it afterwards ;)
diff --git a/Include/codecs.h b/Include/codecs.h
index 82f18cd..0d76241 100644
--- a/Include/codecs.h
+++ b/Include/codecs.h
@@ -29,15 +29,15 @@
 
 /* Codec register lookup API.
 
-   Looks up the given encoding and returns a tuple (encoder, decoder,
-   stream reader, stream writer) of functions which implement the
-   different aspects of processing the encoding.
+   Looks up the given encoding and returns a CodecInfo object with
+   function attributes which implement the different aspects of
+   processing the encoding.
 
    The encoding string is looked up converted to all lower-case
    characters. This makes encodings looked up through this mechanism
    effectively case-insensitive.
 
-   If no codec is found, a KeyError is set and NULL returned. 
+   If no codec is found, a KeyError is set and NULL returned.
 
    As side effect, this tries to load the encodings package, if not
    yet done. This is part of the lazy load strategy for the encodings
@@ -101,6 +101,20 @@
        const char *encoding
        );
 
+/* Get a IncrementalEncoder object for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_IncrementalEncoder(
+       const char *encoding,
+       const char *errors
+       );
+
+/* Get a IncrementalDecoder object function for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_IncrementalDecoder(
+       const char *encoding,
+       const char *errors
+       );
+
 /* Get a StreamReader factory function for the given encoding. */
 
 PyAPI_FUNC(PyObject *) PyCodec_StreamReader(