Ar an dara lá is fiche de mí Iúil, scríobh Stephen J. Turnbull: The right thing; it returns a string consisting of a tilde. (The actual error octet can be specified at coding system creation, but it defaults to the ASCII value for tilde. This is inappropriate for EBCDIC.) The extant koi8-r coding system returns the string "\x92\xB0\xEC", which is not the right thing, for any sane understanding of “the right thing.” It seems to me that an API like (query-coding-region START END CODING-SYSTEM &optional BUFFER) returning, say, a list of buffer offsets and lengths, is the most appropriate general way to implement a UI for warning that a given coding system will not encode a given buffer. GNU’s safe-charset and safe-chars properties doesn’t work in our context, or even in theirs, since whether a given internal character can be encoded by a given coding system will vary from one invocation to the next, and will often (but not always) be dependent on its unicode mapping. My encode-coding-string example gives a string consisting of a single question mark there, for example. And you’ve come across the problems with the (decode-coding-region START END CODING-SYSTEM BUFFER FLAGS) API yourself. I’m not proposing to implement this right now, mind, but it’s an idea. Well, latin-unity deals with that problem for the 8859 coding systems, and in a way that’s compatible with 21.4, so I don’t necessarily see any reason to change that. Spoken like a true Lisper :-) . If I it weren’t for its terrible Unicode support I’d be on SXEmacs right now, without making a complaint here--because the situation is clear to everyone, right?--because of the terrible speed and memory usage of 21.5. Lots of people care about performance, but realise that complaining about it will rarely get them anywhere, since solving performance problems post facto is hard. The API is independent of the implementation. And maybe I wanted to learn some Lisp for a change. -- On the quay of the little Black Sea port, where the rescued pair came once more into contact with civilization, Dobrinton was bitten by a dog which was assumed to be mad, though it may only have been indiscriminating. (Saki) _______________________________________________ XEmacs-Patches mailing list XEmacs-Patches(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-patches