Re: Encoding for a file containing filenames?

[Kenichi Handa]

In article <address@hidden>, Stefan Monnier <address@hidden> writes:

>>> But it will fail in Emacs-22 if the file (which contains file names)
>>> contains chars that Emacs-22 doesn't know how to encode to (and decode
>>> from) utf-8.
> > Are there any such chars that are likely to be used in filenames? Or is it
> > just the mule specific charsets that Emacs-22 cannot encode as utf-8.

> It's actually a bit worse: it shouldn't just be encodable with utf-8,
> but it should also be the case that encoding to utf-8 and back should
> return the exact same string (since these are filenames and will be
> compared with simple byte-comparison in the kernel).

I think the important thing is to assure the round-trip of
decode&encode (not encode&decode).  And utf-8 should
preserve exact byte sequence on decode&encode.

---
Kenichi Handa
address@hidden