Implement the \: (optional line break) escape sequence,

documented in the Ossanna-Kernighan-Ritter troff manual
and also supported by groff.

Missing feature reported by Steffen Nurpmeso <sdaoden at gmail dot com>.

1 files changed, 14 insertions, 5 deletions

diff --git a/mandocdb.c b/mandocdb.c
index 8be546b3..4a7dd1f6 100644
--- a/mandocdb.c
+++ b/mandocdb.c
@@ -1664,7 +1664,7 @@ static void
 render_key(struct mchars *mc, struct str *key)
 {
 	size_t		 sz, bsz, pos;
-	char		 utfbuf[7], res[5];
+	char		 utfbuf[7], res[6];
 	char		*buf;
 	const char	*seq, *cpp, *val;
 	int		 len, u;
@@ -1676,7 +1676,8 @@ render_key(struct mchars *mc, struct str *key)
 	res[1] = '\t';
 	res[2] = ASCII_NBRSP;
 	res[3] = ASCII_HYPH;
-	res[4] = '\0';
+	res[4] = ASCII_BREAK;
+	res[5] = '\0';
 
 	val = key->key;
 	bsz = strlen(val);
@@ -1707,15 +1708,23 @@ render_key(struct mchars *mc, struct str *key)
 			val += sz;
 		}
 
-		if (ASCII_HYPH == *val) {
+		switch (*val) {
+		case (ASCII_HYPH):
 			buf[pos++] = '-';
 			val++;
 			continue;
-		} else if ('\t' == *val || ASCII_NBRSP == *val) {
+		case ('\t'):
+			/* FALLTHROUGH */
+		case (ASCII_NBRSP):
 			buf[pos++] = ' ';
 			val++;
+			/* FALLTHROUGH */
+		case (ASCII_BREAK):
 			continue;
-		} else if ('\\' != *val)
+		default:
+			break;
+		}
+		if ('\\' != *val)
 			break;
 
 		/* Read past the slash. */