BITLEN2BIGNUMLEN
#define BIG_CHUNKS_FOR_160BITS BITLEN2BIGNUMLEN(160)
rwords = BITLEN2BIGNUMLEN(rlen);
if ((brv = big_extend(&(dhkey.x), BITLEN2BIGNUMLEN(bkey->value_bits)))
len = BITLEN2BIGNUMLEN(size);
len = BITLEN2BIGNUMLEN(size);
plen = BITLEN2BIGNUMLEN(psize);
qlen = BITLEN2BIGNUMLEN(qsize);
keylen = BITLEN2BIGNUMLEN(size);