bigint_length_t bigint_length_b(const bigint_t *a);
bigint_length_t bigint_length_B(const bigint_t *a);
void bigint_copy(bigint_t *dest, const bigint_t *src);
bigint_length_t bigint_length_b(const bigint_t *a);
bigint_length_t bigint_length_B(const bigint_t *a);
void bigint_copy(bigint_t *dest, const bigint_t *src);