RFR: JDK-8039751: UTF-8 decoder fails to handle some edge cases correctly

[Alan Bateman]

On 09/04/2014 22:51, Xueming Shen wrote:
> Hi,
>
> Please help review the fix for JDK-8039751.
>
> Issue:     https://bugs.openjdk.java.net/browse/JDK-8039751
> webrev:  http://cr.openjdk.java.net/~sherman/8039751/webrev/
>
>
> This is the corner case (in 4 bytes sequence) we missed when fixing 
> 7096080 [1].
> The UTF_8 decoder correctly returns the malformed length for some 
> malformed
> 4-byte illegal byte sequence (via Decoder.malformedN(...)), but it 
> fails to do so if
> there is no enough (< 4 bytes) bytes in input buffer (via 
> isMalfromed4_2(...))
This looks okay to me although I think it would be useful to put in an 
addition comment or two to make these corner cases a bit easier to 
understand when looking at this code.

-Alan.