Fixed bug in 'url_to_hostname' function

url_manipulation.c

@@ -20,7 +20,8 @@ char* url_to_proto(char* url) {
 char* url_to_hostname(char* url) {
 	/* This function relies on a hack-y assumption: that, given a string
 	that represents a URL (e.g. https://www.example.com/index.html), the length of the host portion 
-	of the address is the distance between the second slash (:/'/') and the third ('/'index.html). */
+	of the address is the distance between the second slash (:/'/') and the third ('/'index.html),
+	or the second slash and the end of the string, if the path isn't present. */
 
 	size_t length = strlen(url);
 	char* protocol = url_to_proto(url);
@@ -41,6 +42,11 @@ char* url_to_hostname(char* url) {
 			sentinel = i;
 		}
 	}
+
+
+	if (sentinel == 0) { /* If there are no more slashes */
+		return temp_substring;
+	}
 	strncpy(to_return,temp_substring,sentinel);
 	free(temp_substring);
 	return to_return;