-char **os_AddStrArray(char *str, char **array);
-void os_FreeArray(char *ch1, char **ch2);
-int os_IsStrOnArray(char *str, char **array);
-char *os_LoadString(char *at, char *str);
+char **os_AddStrArray(const char *str, char **array);
+void os_FreeArray(char *ch1, char **ch2);
+int os_IsStrOnArray(const char *str, char **array);
+char *os_LoadString(char *at, const char *str) __attribute__((nonnull(2)));
+void *memset_secure(void *v, int c, size_t n) __attribute__((nonnull));