advent2021

commit 7ef5ddd38b62e5e0f587e8632281994345b43ff1
parent 8cd6edcd11d419092f195011c0640d01e06647e8
Author: bsandro <[email protected]>
Date:   Mon, 13 Dec 2021 03:09:42 +0200

strncpy boundaries checked

Diffstat:
M
day12/puzzle.c
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/day12/puzzle.c b/day12/puzzle.c
@@ -187,7 +187,7 @@ void add_path(struct array_t *nodes, const char *str) {
 		if (*token != '\0') {
 			assert(i < 2);
 			assert(strlen(token) < NAME_LEN);
-			strncpy(names[i], token, NAME_LEN);
+			strncpy(names[i], token, NAME_LEN-1);
 			++i;
 		}
 	}
@@ -226,7 +226,7 @@ int node_add(struct array_t *nodes, const char *name) {
 	struct node_t *data = (struct node_t *)nodes->data;
 	struct node_t *node = &data[nodes->count++];
 	node->id = last_id++;
-	strncpy(node->name, name, NAME_LEN);
+	strncpy(node->name, name, NAME_LEN-1);
 	if (strncmp(node->name, NAME_START, NAME_LEN) == 0) {
 		node->is_start = true;
 	} else if (strncmp(node->name, NAME_END, NAME_LEN) == 0) {