Re: Unibyte characters, strings, and buffers

[Andreas Schwab]

David Kastrup <address@hidden> writes:

> "Stephen J. Turnbull" <address@hidden> writes:
>
>> I agree that having a way to represent "undecodable bytes" in a string
>> or buffer is extremely convenient.  XEmacs's lack of this capability
>> is surely a deficiency (Hi, David K!)
>
> Doing this in an utf-8 based internal coding is somewhat doable by
> employing non-utf-8 sequences.  Either using code points above the
> Unicode code range (2^20 + something, requiring 4 bytes), or by using
> non-minimal encodings (since the minimal ones are two bytes, requiring 3
> bytes).  Either way, the size increases significantly.

Emacs uses U3fff80-U3fffff for raw 8-bit bytes, internally represented
by 2 bytes.

Andreas.

-- 
Andreas Schwab, address@hidden
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