+_STACK *sk_deep_copy(_STACK *sk, void *(*copy_func)(void *),
+ void (*free_func)(void *))
+ {
+ _STACK *ret;
+ int i;
+
+ if ((ret = OPENSSL_malloc(sizeof(_STACK))) == NULL)
+ return ret;
+ ret->comp = sk->comp;
+ ret->sorted = sk->sorted;
+ ret->num = sk->num;
+ ret->num_alloc = sk->num > MIN_NODES ? sk->num : MIN_NODES;
+ ret->data = OPENSSL_malloc(sizeof(char *) * ret->num_alloc);
+ if (ret->data == NULL)
+ {
+ OPENSSL_free(ret);
+ return NULL;
+ }
+ for (i = 0; i < ret->num_alloc; i++)
+ ret->data[i] = NULL;
+
+ for (i = 0; i < ret->num; ++i)
+ {
+ if (sk->data[i] == NULL)
+ continue;
+ if ((ret->data[i] = copy_func(sk->data[i])) == NULL)
+ {
+ while (--i >= 0)
+ if (ret->data[i] != NULL)
+ free_func(ret->data[i]);
+ sk_free(ret);
+ return NULL;
+ }
+ }
+ return ret;
+ }
+