Reject Unicode non-characters.

kilobyte · Jul 27, 2018 · 601e497 · 601e497
1 parent 669205b
commit 601e497
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/libtty/tty.c b/libtty/tty.c
@@ -363,6 +363,11 @@ export void tty_write(tty vt, const char *buf, int len)
                             continue;
                     }
                 }
+
+                if (c>0x10FFFF) // outside Unicode
+                    c=0xFFFD;
+                else if ((c&0xFFFF)>=0xFFFE || c>=0xFDD0 && c<0xFDF0)
+                    c=0xFFFD; // non-characters
             }
             else
             {