Make ucs-names a hash table (Bug#28302)

* etc/NEWS: Mention the type change.
* lisp/descr-text.el (describe-char): Use gethash to access ucs-names.
Hardcode BEL's name into the function instead of needlessly mapping
over the hash table in the spirit of rassoc.
* lisp/international/mule-cmds.el (ucs-names): Fix variable and
function docstrings.  Initialize a hash table for ucs-names--the
number of entries is 42845 here.  Switch to hash-table
getters/setters.
(mule--ucs-names-annotation): Use hash-table getter.
(char-from-name): Upcase the string if ignore-case is truthy.
* lisp/leim/quail/latin-ltx.el: Use maphash instead of dolist.

1 files changed, 3 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 0889303f82e..d32b0e5bc89 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1155,6 +1155,9 @@ isn't compatible with previous Emacs versions.  This functionality can
 be disabled by setting 'byte-compile-cond-use-jump-table' to nil.
 
 ---
+** The alist 'ucs-names' is now a hash table.
+
+---
 ** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
 mode to send the same escape sequences that xterm does.  This makes
 things like forward-word in readline work.