alf: Use 0 datestamp if year out of range; unalf: Display 0 datestamps as <none>.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/listalf.c b/src/listalf.c
index 34078e5..33b2bfe 100644
--- a/src/listalf.c
+++ b/src/listalf.c
@@ -50,14 +50,16 @@ void format_msdos_date(char *buf) {
 	/* year actually ranges 1980 to 2107... */
 	year = (d >> 9) + 1980;
 
-	/* valid months range 1 to 12. values 0, 13, 14, 15 are possible
-	   but invalid (print as ???) */
+	/* valid months range 1 to 12 */
 	month = (d >> 5) & 0x0f;
 
-	/* valid day range is 1 to 31. 0 is invalid, print as-is. */
+	/* valid day range is 1 to 31. 0 is invalid. */
 	day = d & 0x1f;
 
-	snprintf(buf, 12, "%2d %3s %04d", day, monthnames[month], year);
+	if(day == 0 || month == 0 || month > 12)
+		strncpy(buf, "<none>", 12);
+	else
+		snprintf(buf, 12, "%2d %3s %04d", day, monthnames[month], year);
 }
 
 /* small files may be "compressed" larger than the original, so this