Steel Bank Common Lisp

Nicolas Neuss <neuss@...> writes:

> I have a file with German "Umlaute".  When I try to load it I get
>
> debugger invoked on a SB-INT:STREAM-DECODING-ERROR in thread
> #<THREAD "initial thread" {1002270781}>:
>   decoding error on stream
>     #<SB-SYS:FD-STREAM for "file
>     /home/neuss/Programming/lisp/stundenplan.lisp" {100306FB41}>
>       (:EXTERNAL-FORMAT :UTF-8):
>           the octet sequence (246 114 115 97) cannot be decoded.
>
> I guess that I have to switch SBCL to ISO-8859-1.  How is this done?
> (Is this somewhere in the manual?  I didn't find it.)

External-format support is sadly underdocumented in the manual for
now. You need to supply an :EXTERNAL-FORMAT argument to
LOAD/COMPILE-FILE/OPEN/WITH-OPEN-FILE.

 (mapcar #'caar sb-impl::*external-formats*)

Should give you a (non-exhaustive) list of valid argument values to
:EXTERNAL-FORMAT, which includes among others :ASCII, :LATIN-1,
:UTF-8, and naturally :EBDIC-US.

Cheers,

  -- Nikodemus              Schemer: "Buddha is small, clean, and serious."
                   Lispnik: "Buddha is big, has hairy armpits, and laughs."

Nikodemus Siivola <nikodemus@...> writes:

> External-format support is sadly underdocumented in the manual for
> now. You need to supply an :EXTERNAL-FORMAT argument to
> LOAD/COMPILE-FILE/OPEN/WITH-OPEN-FILE.

A little bit more detail on the "sadly underdocumented" bit: it isn't
so much that the documentation is incomplete as the implementation
itself; while what we have works for Unixish systems, we don't yet
have the kind of support for MSDOS and (Old)Mac line endings, Win32
byte-order marks, and the like that would let us properly document
things; additionally, the implementation is a little bit "smelly" in
that there are multiple pieces of functionality that have to be
implemented for external formats (FFI translations, string-to-octets,
and stream translations, for example) that are not implemented even
for all currently supported external formats.

Cheers,

Christophe

Nikodemus Siivola <nikodemus@...> writes:

> External-format support is sadly underdocumented in the manual for
> now. You need to supply an :EXTERNAL-FORMAT argument to
> LOAD/COMPILE-FILE/OPEN/WITH-OPEN-FILE.
>
>  (mapcar #'caar sb-impl::*external-formats*)
>
> Should give you a (non-exhaustive) list of valid argument values to
> :EXTERNAL-FORMAT, which includes among others :ASCII, :LATIN-1,
> :UTF-8, and naturally :EBDIC-US.

Thank you, (load ... :external-format :latin-1) works.

A connected question: is there a way to make SLIME use this option when I
press C-c C-k (slime-compile-and-load-file)?

Thanks again, Nicolas