mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
87 lines
2.3 KiB
V
87 lines
2.3 KiB
V
import bignum
|
|
|
|
fn test_new_bignum(){
|
|
n := bignum.new_bignum()
|
|
assert sizeof( bignum.Number ) == 128
|
|
assert n.hexstr() == '0'
|
|
}
|
|
|
|
fn test_from_int(){
|
|
assert bignum.from_int(255).hexstr() == 'ff'
|
|
assert bignum.from_int(127).hexstr() == '7f'
|
|
assert bignum.from_int(1024).hexstr() == '400'
|
|
assert bignum.from_int(2147483647).hexstr() == '7fffffff'
|
|
assert bignum.from_int(-1).hexstr() == 'ffffffffffffffff'
|
|
}
|
|
|
|
fn test_from_u64(){
|
|
assert bignum.from_u64(255).hexstr() == 'ff'
|
|
assert bignum.from_u64(127).hexstr() == '7f'
|
|
assert bignum.from_u64(1024).hexstr() == '400'
|
|
assert bignum.from_u64(4294967295).hexstr() == 'ffffffff'
|
|
assert bignum.from_u64(4398046511104).hexstr() == '40000000000'
|
|
assert bignum.from_u64(-1).hexstr() == 'ffffffffffffffff'
|
|
}
|
|
|
|
fn test_plus(){
|
|
a := bignum.from_u64(2)
|
|
b := bignum.from_u64(3)
|
|
c := a + b
|
|
assert c.hexstr() == '5'
|
|
assert (bignum.from_u64(1024) + bignum.from_u64(1024)).hexstr() == '800'
|
|
}
|
|
|
|
fn test_minus(){
|
|
a := bignum.from_u64(2)
|
|
b := bignum.from_u64(3)
|
|
c := b - a
|
|
assert c.hexstr() == '1'
|
|
e := bignum.from_u64(1024)
|
|
ee := e - e
|
|
assert ee.hexstr() == '0'
|
|
}
|
|
|
|
fn test_divide(){
|
|
a := bignum.from_u64(2)
|
|
b := bignum.from_u64(3)
|
|
c := b / a
|
|
assert c.hexstr() == '1'
|
|
assert (b % a ).hexstr() == '1'
|
|
e := bignum.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 := bignum.from_u64(2)
|
|
b := bignum.from_u64(3)
|
|
c := b * a
|
|
assert c.hexstr() == '6'
|
|
e := bignum.from_u64(1024)
|
|
e2 := e * e
|
|
e4 := e2 * e2
|
|
e8 := e2 * e2 * e2 * e2
|
|
e9 := e8 + bignum.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 (bignum.from_u64(13) % bignum.from_u64(10) ).int() == 3
|
|
assert (bignum.from_u64(13) % bignum.from_u64(9) ).int() == 4
|
|
assert (bignum.from_u64(7) % bignum.from_u64(5) ).int() == 2
|
|
}
|
|
|
|
|
|
fn test_factorial(){
|
|
f5 := bignum.factorial( bignum.from_u64(5) )
|
|
assert f5.hexstr() == '78'
|
|
f100 := bignum.factorial( bignum.from_u64(100) )
|
|
assert f100.hexstr() == '1b30964ec395dc24069528d54bbda40d16e966ef9a70eb21b5b2943a321cdf10391745570cca9420c6ecb3b72ed2ee8b02ea2735c61a000000000000000000000000'
|
|
}
|