uint_fast64_t
static uint_fast64_t
static uint_fast64_t entropy_buffer[max(1, 256 / sizeof(uint_fast64_t))];
uint_fast64_t rand_max = RAND_MAX,
uint_fast64_t rmax1 = rmax;
uint_fast64_t r;
uint_fast64_t base = alphabetlen;
uint_fast64_t base__6 = base * base * base * base * base * base;
uint_fast64_t unfair_min = - ((UINTMAX_MAX % base__6 + 1) % base__6);
convert64(uint_fast64_t val, char *buf)