From 7a469bb4f18514255f88c7f07c67787f75bdfa2c Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Wed, 23 Mar 2022 19:54:37 -0400
Subject: datetime: Change sanity checks

Check if the year is earlier than 1900 instead of 1970.

Step one of eliminating timegm().
---
(limited to 'src')

diff --git a/src/datetime.c b/src/datetime.c
index 5caa1b7..ccf4c29 100644
--- a/src/datetime.c
+++ b/src/datetime.c
@@ -175,7 +175,7 @@ datetime_parse(struct tm *now_tm, const char *input, time_t *arg_sec)
 		end = strptime(input, fmt_buf, &arg_tm);
 		if (end != NULL && *end == '\0') {
 			_datetime_normalize(now_tm, &arg_tm, arg_sec);
-			if (datetime_diff_epoch(*arg_sec) >= 0) {
+			if (arg_tm.tm_year >= 0) {
 				free(fmt_buf);
 				return 0;
 			}
@@ -196,7 +196,7 @@ datetime_parse(struct tm *now_tm, const char *input, time_t *arg_sec)
 			end = strptime(input, fmt_buf, &arg_tm);
 			if (end != NULL && *end == '\0') {
 				_datetime_normalize(now_tm, &arg_tm, arg_sec);
-				if (datetime_diff_epoch(*arg_sec) >= 0) {
+				if (arg_tm.tm_year >= 0) {
 					free(fmt_buf);
 					return 0;
 				}
@@ -218,7 +218,7 @@ datetime_parse(struct tm *now_tm, const char *input, time_t *arg_sec)
 			end = strptime(input, fmt_buf, &arg_tm);
 			if (end != NULL && *end == '\0') {
 				_datetime_normalize(now_tm, &arg_tm, arg_sec);
-				if (datetime_diff_epoch(*arg_sec) >= 0) {
+				if (arg_tm.tm_year >= 0) {
 					free(fmt_buf);
 					return 0;
 				}
@@ -233,7 +233,7 @@ datetime_parse(struct tm *now_tm, const char *input, time_t *arg_sec)
 		end = strptime(input, fmt_buf, &arg_tm);
 		if (end != NULL && *end == '\0') {
 			_datetime_normalize(now_tm, &arg_tm, arg_sec);
-			if (datetime_diff_epoch(*arg_sec) >= 0) {
+			if (arg_tm.tm_year >= 0) {
 				free(fmt_buf);
 				return 0;
 			}
--
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