import big fn test_new_big(){ n := big.new() assert sizeof( big.Number ) == 128 assert n.hexstr() == '0' } fn test_from_int(){ assert big.from_int(255).hexstr() == 'ff' assert big.from_int(127).hexstr() == '7f' assert big.from_int(1024).hexstr() == '400' assert big.from_int(2147483647).hexstr() == '7fffffff' assert big.from_int(-1).hexstr() == 'ffffffffffffffff' } fn test_from_u64(){ assert big.from_u64(255).hexstr() == 'ff' assert big.from_u64(127).hexstr() == '7f' assert big.from_u64(1024).hexstr() == '400' assert big.from_u64(4294967295).hexstr() == 'ffffffff' assert big.from_u64(4398046511104).hexstr() == '40000000000' assert big.from_u64(-1).hexstr() == 'ffffffffffffffff' } fn test_plus(){ a := big.from_u64(2) b := big.from_u64(3) c := a + b assert c.hexstr() == '5' assert (big.from_u64(1024) + big.from_u64(1024)).hexstr() == '800' } fn test_minus(){ a := big.from_u64(2) b := big.from_u64(3) c := b - a assert c.hexstr() == '1' e := big.from_u64(1024) ee := e - e assert ee.hexstr() == '0' } fn test_divide(){ a := big.from_u64(2) b := big.from_u64(3) c := b / a assert c.hexstr() == '1' assert (b % a ).hexstr() == '1' e := big.from_u64(1024) // dec(1024) == hex(0x400) ee := e / e assert ee.hexstr() == '1' assert (e / a).hexstr() == '200' assert (e / (a*a)).hexstr() == '100' } fn test_multiply(){ a := big.from_u64(2) b := big.from_u64(3) c := b * a assert c.hexstr() == '6' e := big.from_u64(1024) e2 := e * e e4 := e2 * e2 e8 := e2 * e2 * e2 * e2 e9 := e8 + big.from_u64(1) d := ((e9 * e9) + b) * c assert e4.hexstr() == '10000000000' assert e8.hexstr() == '100000000000000000000' assert e9.hexstr() == '100000000000000000001' assert d.hexstr() == '60000000000000000000c00000000000000000018' } fn test_mod(){ assert (big.from_u64(13) % big.from_u64(10) ).int() == 3 assert (big.from_u64(13) % big.from_u64(9) ).int() == 4 assert (big.from_u64(7) % big.from_u64(5) ).int() == 2 } fn test_factorial(){ f5 := big.factorial( big.from_u64(5) ) assert f5.hexstr() == '78' f100 := big.factorial( big.from_u64(100) ) assert f100.hexstr() == '1b30964ec395dc24069528d54bbda40d16e966ef9a70eb21b5b2943a321cdf10391745570cca9420c6ecb3b72ed2ee8b02ea2735c61a000000000000000000000000' }