From bf6d09e99ab8354075dff9e39aea716825cba214 Mon Sep 17 00:00:00 2001
From: bjoernf <bjoern.foersterling@web.de>
Date: Sat, 30 Dec 2023 05:02:49 +0100
Subject: [PATCH] added asserts to prevent segfaults from dereferencing null
 pointers

---
 src/parse_ics.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/parse_ics.c b/src/parse_ics.c
index 13a4bba..683557f 100644
--- a/src/parse_ics.c
+++ b/src/parse_ics.c
@@ -3,6 +3,7 @@
 #include "string_handling.h"
 #include <stdlib.h>
 #include <string.h>
+#include <assert.h>
 
 void parse_event(char event_string[], struct event **head) {
 	char *start_date = strstr(event_string, "\r\nDTSTART;");
@@ -20,6 +21,13 @@ void parse_event(char event_string[], struct event **head) {
 	memset(end_date_str, '\0', 256);
 	memset(summary_str, '\0', 512);
 
+	assert(start_date != NULL);
+	assert(end_date != NULL);
+	assert(sequence != NULL);
+	assert(summary != NULL);
+	assert(location != NULL);
+	assert(transp != NULL);
+
 	strncpy(start_date_str, start_date, end_date - start_date);
 
 	strncpy(end_date_str, end_date, sequence - end_date);