[issue12892] UTF-16 and UTF-32 codecs should reject (lone) surrogates

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

UTF-16 codec still fast enough. Let first make it correct and then will try optimize it. I have an idea how restore 3.3 performance (if it worth, the code already complicated enough).

The converting to/from wchar_t* uses different code.

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<http://bugs.python.org/issue12892>
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