long long int i8_choose ( long long int n, long long int k );
long long int i8_huge ( );
double i8_huge_normalizer ( );
long long int i8_max ( long long int i1, long long int i2 );
long long int i8_min ( long long int i1, long long int i2 );
long long int i8_power ( long long int i, long long int j );
long long int i8_reverse_bytes ( long long int x );
unsigned long long int i8_xor ( unsigned long long int i, 
  unsigned long long int j );
double r8i8_uniform ( double a, double b, long long int *seed );
double r8i8_uniform_01 ( long long int *seed );
void timestamp ( );