[Cuis-dev] [DEFECT] Can neither write nor read DoubleByteArray instances

[Juan Vuletich]

Hi Gerald,

The same should happen with WordArray. The issue here is that files are 
byte sequential. Storing multibyte objects requires defining an 
endianess. A double byte array written to a file may be in Big Endian or 
Little Endian format. So, the protocol would need to change. Perhaps 
#nextPutAll:isLittleEndian: or similar.

Cheers,

On 7/30/2023 10:04 AM, Gerald Klix via Cuis-dev wrote:
> Hi all, Hi Juan,
>
> I just found out that I can neither write nor read
> instances of a DoubleByteArray with the new UniFileStream.
>
> The writing issue can be fixed easily by adding:
>
> asUtf8Bytes
>     "Answer me as UTF8 bytes for writing on a UniFileStream."
>
>     ^ self
>
> to DoubleByteArray.
>
> Reading a whole junk into a double byte array
> fails completely, because the #next:into:startingAt:
> tries to do this byte by byte (and fails).
>
>
> Test code:
>
> 'test.bytes' asFileEntry forceWriteStreamDo: [ :stream |
>     stream nextPutAll: (DoubleByteArray with: 4711) ].
>
> 'test.bytes' asFileEntry readStreamDo: [ :stream | | a |
>     a := DoubleByteArray new: 1.
>     a byteSize print.
>     stream next: a byteSize into: a startingAt: 1.
>     a explore ]
>
>
> Best Regards,
>
> Gerald
>
>
> PS: Needless to sya that DoubleWordArray has the same problems.


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Juan Vuletich
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