User: aidan Date: 05/03/01 00:36:34 Modified: xemacs/src ChangeLog unicode.c Log: Add details about losing data to the unicode-to-char docstring. The Mule character encoding model means that extant Unicode coding systems will lose data. Make this clear in the docstring of unicode-to-char, give sample code to implement support for some desired code points should our distributors want to do that. Revision Changes Path 1.797 +8 -0 XEmacs/xemacs/src/ChangeLog Index: ChangeLog =================================================================== RCS file: /pack/xemacscvs/XEmacs/xemacs/src/ChangeLog,v retrieving revision 1.796 retrieving revision 1.797 diff -u -r1.796 -r1.797 --- ChangeLog 2005/02/28 20:21:48 1.796 +++ ChangeLog 2005/02/28 23:36:30 1.797 ＠＠ -1,3 +1,11 ＠＠ +2005-03-01 Aidan Kehoe <kehoea(a)parhasard.net&gt; + + * unicode.c: The Mule character encoding model means that extant + Unicode coding systems will lose data. Make this clear in the + docstring of unicode-to-char, give sample code to implement + support for some desired code points should our distributors want + to do that. + 2005-02-28 Aidan Kehoe <kehoea(a)parhasard.net&gt; * select-gtk.c (emacs_gtk_selection_handle): 1.26 +32 -0 XEmacs/xemacs/src/unicode.c Index: unicode.c =================================================================== RCS file: /pack/xemacscvs/XEmacs/xemacs/src/unicode.c,v retrieving revision 1.25 retrieving revision 1.26 diff -u -r1.25 -r1.26 --- unicode.c 2005/02/03 16:14:08 1.25 +++ unicode.c 2005/02/28 23:36:32 1.26 ＠＠ -1281,6 +1281,38 ＠＠ When there is no international support (i.e. the 'mule feature is not present), this function simply does `int-to-char' and ignores the CHARSETS argument. + +Note that the current XEmacs internal encoding has no mapping for many +Unicode code points, and if you use characters that are vaguely obscure with +XEmacs' Unicode coding systems, you will lose data. + +To add support for some desired code point in the short term--note that our +intention is to move to a Unicode-compatible internal encoding soon, for +some value of soon--if you are a distributor, add something like the +following to `site-start.el.' + +(make-charset 'distro-name-private + "Private character set for DISTRO" + '(dimension 1 + chars 96 + columns 1 + final ?5 ;; Change this--see docs for make-charset + long-name "Private charset for some Unicode char support." + short-name "Distro-Private")) + +(set-unicode-conversion + (make-char 'distro-name-private #x20) #x263A) ;; WHITE SMILING FACE + +(set-unicode-conversion + (make-char 'distro-name-private #x21) #x3030) ;; WAVY DASH + +;; ... +;;; Repeat as necessary. + +Redisplay will work on the sjt-xft branch, but not with server-side X11 +fonts as is the default. However, data read in will be preserved when they +are written out again. + */ (code, USED_IF_MULE (charsets))) {