From 8f1be1d0db978b5da2fb9a84f9228397af5b5f6f Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Wed, 01 Sep 2021 11:57:53 -0400
Subject: main: Skip empty formats

This was previously done in _datetime_strftime() but in a way that would
overflow the array if an empty format was at the end.  Moving this logic
into the caller is safer and makes a little more sense.
---
diff --git a/src/main.c b/src/main.c
index 8e5d2f7..10630e8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -94,18 +94,27 @@ _list_formats(void)
 	puts("Time formats:");
 	i = 0;
 	while (datetime_strftime_time(tm, &out, &buf_sz, &buf, &i) > 0) {
+		if (out[0] == '\0') {
+			continue;
+		}
 		printf("  * %s\n", out);
 	}
 
 	puts("Date formats:");
 	i = 0;
 	while (datetime_strftime_date(tm, &out, &buf_sz, &buf, &i) > 0) {
+		if (out[0] == '\0') {
+			continue;
+		}
 		printf("  * %s\n", out);
 	}
 
 	puts("Additional formats:");
 	i = 0;
 	while (datetime_strftime_misc(tm, &out, &buf_sz, &buf, &i) > 0) {
+		if (out[0] == '\0') {
+			continue;
+		}
 		printf("  * %s\n", out);
 	}
 }
--
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