Support the alternative syntax \C'uXXXX' for Unicode characters.

It is already documented in the Heirloom troff manual,
and groff handles it as well.

Bug reported by Bjarni Ingi Gislason <bjarniig at rhi dot hi dot is>
on <bug-groff at gnu dot org>.  Well, admittedly, that bug was reported
against groff, but mandoc was even more broken than groff with respect
to this syntax...

1 files changed, 4 insertions, 1 deletions

diff --git a/mandoc.c b/mandoc.c
index fab0c440..4cba828d 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -93,8 +93,11 @@ mandoc_escape(const char const **end, const char const **start, int *sz)
 	case ('C'):
 		if ('\'' != **start)
 			return(ESCAPE_ERROR);
-		gly = ESCAPE_SPECIAL;
 		*start = ++*end;
+		if ('u' == (*start)[0] && '\'' != (*start)[1])
+			gly = ESCAPE_UNICODE;
+		else
+			gly = ESCAPE_SPECIAL;
 		term = '\'';
 		break;