bug#1051: 23.0.60; rmail decoding bug

[Kenichi Handa <handa@m17n.org>]

In article <uiqsdkfmo.fsf@gnu.org>, Eli Zaretskii <eliz@gnu.org> writes:

> > It may be good to provide byte-after, following-byte, and
> > preceding-byte (all signal an error if the character is not
> > an ASCII nor eight-bit character).  What do you think?

> I agree that it would be nice to have such a feature, but perhaps a
> single API

>   (get-byte POS)

> would be enough?  This could default to point if POS is nil or
> omitted, and could even read from a string if POS is a string.

Ah!  How about something like this?

(defun get-byte (pos &optional string)
  "Return a byte at position POS of the current buffer..
If POS is nil, it defaults to point.
If the second optional arg STRING is non-nil, return a byte in
STRING at index POS.
An error is signaled if the character at POS is not ASCII
nor eight-bit character."
  ...)

---
Kenichi Handa
handa@ni.aist.go.jp