Fix bug #16043 with crashes when displaying new bidi control characters.

 src/bidi.c (bidi_get_type, bidi_get_category): Handle the isolate
 directional control characters.  Update type and category
 determination according to the UBA from Unicode v6.3.
 (bidi_category_t): New category EXPLICIT_FORMATTING.
 src/dispextern.h (bidi_type_t): Update to include new bidirectional
 properties introduced with Unicode v6.3.

 admin/unidata/unidata-gen.el (unidata-prop-alist): Update bidi-class
 to include the new isolate-related classes introduced with Unicode
 v6.3.
 (unidata-encode-val): Accept an additional optional argument, a
 warning message to emit when UnicodeData.txt defines bidi-class
 values that are not in unidata-prop-alist.  Add a comment
 explaining what should maintainers do if/when such a warning ever
 appears.
 (unidata-gen-table): Call unidata-encode-val with 3rd arg non-nil
 when generating uni-bidi.el.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index 2ce0a8f4c99..7de4edf2196 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -1895,6 +1895,10 @@ typedef enum {
   RLE,          /* right-to-left embedding */
   RLO,          /* right-to-left override */
   PDF,          /* pop directional format */
+  LRI,          /* left-to-right isolate */
+  RLI,          /* right-to-left isolate */
+  FSI,          /* first strong isolate */
+  PDI,          /* pop directional isolate */
   WEAK_ES,      /* european number separator */
   WEAK_ET,      /* european number terminator */
   WEAK_CS,      /* common separator */