crazy structs i need to fit into a StructView

gmp.h

/* Available random number generation algorithms.  */
typedef enum
{
  GMP_RAND_ALG_DEFAULT = 0,
  GMP_RAND_ALG_LC = GMP_RAND_ALG_DEFAULT /* Linear congruential.  */
} gmp_randalg_t;

/* Random state struct.  */
typedef struct
{
  mpz_t _mp_seed;	  /* _mp_d member points to state of the generator. */
  gmp_randalg_t _mp_alg;  /* Currently unused. */
  union {
    void *_mp_lc;         /* Pointer to function pointers structure.  */
  } _mp_algdata;
} __gmp_randstate_struct;
typedef __gmp_randstate_struct gmp_randstate_t[1];

questions.txt

Main Question: How do I represent a gmp_randstate_t as a StructView?

a) The last line, "typedef __gmp_randstate_struct gmp_randstate_t[1];" means that a gmp_randstate_t is really an array of two __gmp_randstate_structs, right?

b) The union around a single void pointer is just the same size as a pointer, right?
c) gmp_randalg_t is typedef'd as an enum but that's just the same size as an integer, right?
d) I already have a function that returns a gmp_t StructView - is there a simple way to embed this stuff?