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8759409a69
* attempt big int min value fix * cast value for correct comparison * update edge case * add one more test
461 lines
15 KiB
V
461 lines
15 KiB
V
import math.big
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fn test_integer_from_int() {
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assert big.integer_from_int(0).hex() == '0'
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assert big.integer_from_int(1).hex() == '1'
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assert big.integer_from_int(255).hex() == 'ff'
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assert big.integer_from_int(127).hex() == '7f'
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assert big.integer_from_int(1024).hex() == '400'
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assert big.integer_from_int(2147483647).hex() == '7fffffff'
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}
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fn test_integer_from_u64() {
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assert big.integer_from_u64(0).hex() == '0'
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assert big.integer_from_u64(1).hex() == '1'
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assert big.integer_from_u64(255).hex() == 'ff'
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assert big.integer_from_u64(127).hex() == '7f'
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assert big.integer_from_u64(1024).hex() == '400'
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assert big.integer_from_u64(4294967295).hex() == 'ffffffff'
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assert big.integer_from_u64(4398046511104).hex() == '40000000000'
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max_value := big.integer_from_u64(u64(-1))
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assert max_value.hex() == 'ffffffffffffffff'
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}
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fn test_integer_from_bytes() {
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assert big.integer_from_bytes([]).hex() == '0'
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assert big.integer_from_bytes([u8(0)]).hex() == '0'
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assert big.integer_from_bytes([u8(0x13), 0x37]).hex() == '1337'
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assert big.integer_from_bytes([u8(0x13), 0x37, 0xca]).hex() == '1337ca'
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assert big.integer_from_bytes([u8(0x13), 0x37, 0xca, 0xfe]).hex() == '1337cafe'
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assert big.integer_from_bytes([u8(0x13), 0x37, 0xca, 0xfe, 0xba]).hex() == '1337cafeba'
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assert big.integer_from_bytes([u8(0x13), 0x37, 0xca, 0xfe, 0xba, 0xbe]).hex() == '1337cafebabe'
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mut bytes := []u8{cap: 1024}
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mut expected := ''
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for i := 0; i < bytes.cap; i++ {
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bytes << u8(i)
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expected = expected + u8(i).hex()
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}
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assert big.integer_from_bytes(bytes).hex() == expected.trim_left('0')
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}
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fn test_bytes() {
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result1, sign1 := big.integer_from_u64(0x1337cafebabe).bytes()
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assert result1 == [u8(0x13), 0x37, 0xca, 0xfe, 0xba, 0xbe]
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assert sign1 == 1
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mut bytes := []u8{cap: 1024}
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mut expected := ''
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for i := 0; i < bytes.cap; i++ {
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bytes << u8(i | 1)
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expected = expected + u8(i).hex()
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}
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result2, sign2 := big.integer_from_bytes(bytes).bytes()
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assert result2 == bytes
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assert sign2 == 1
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}
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fn test_addition() {
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a := big.integer_from_int(2)
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b := big.integer_from_int(3)
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c := a + b
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assert c.hex() == '5'
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assert (big.integer_from_int(1024) + big.integer_from_int(1024)).hex() == '800'
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fib1 := big.integer_from_string('84885164052257330097714121751630835360966663883732297726369399') or {
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panic('Cannot read decimal')
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}
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fib2 := big.integer_from_string('137347080577163115432025771710279131845700275212767467264610201') or {
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panic('Cannot read decimal')
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}
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assert (fib1 + fib2).str() == '222232244629420445529739893461909967206666939096499764990979600'
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}
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fn test_subtraction() {
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a := big.integer_from_int(2)
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b := big.integer_from_int(3)
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assert (a - b).hex() == '-1'
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assert (b - a).hex() == '1'
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c := big.integer_from_int(1024)
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assert (c - c) == big.zero_int
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assert big.integer_from_int(-37) - big.integer_from_int(-54) == big.integer_from_int(17)
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}
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fn test_multiplication() {
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a := big.integer_from_int(2)
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b := big.integer_from_int(3)
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c := big.integer_from_int(6)
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assert a * b == c
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assert big.integer_from_int(-869) * big.integer_from_int(789) == big.integer_from_int(-685641)
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e := big.integer_from_u32(1024)
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e2 := e * e
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e4 := e2 * e2
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e8 := e2 * e2 * e2 * e2
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e9 := e8 + big.one_int
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d := ((e9 * e9) + b) * c
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assert e4.hex() == '10000000000'
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assert e8.hex() == '100000000000000000000'
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assert e9.hex() == '100000000000000000001'
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assert d.hex() == '60000000000000000000c00000000000000000018'
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}
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fn test_division() {
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a := big.integer_from_u64(2)
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b := big.integer_from_u64(3)
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c := b / a
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assert c.hex() == '1'
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assert (b % a).hex() == '1'
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e := big.integer_from_u64(1024) // dec(1024) == hex(0x400)
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ee := e / e
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assert ee.hex() == '1'
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assert (e / a).hex() == '200'
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assert (e / (a * a)).hex() == '100'
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assert (b / a).hex() == '1'
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}
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fn test_mod() {
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assert (big.integer_from_u64(13) % big.integer_from_u64(10)).int() == 3
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assert (big.integer_from_u64(13) % big.integer_from_u64(9)).int() == 4
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assert (big.integer_from_u64(7) % big.integer_from_u64(5)).int() == 2
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}
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fn test_divmod() {
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x, y := big.integer_from_u64(13).div_mod(big.integer_from_u64(10))
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assert x.int() == 1
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assert y.int() == 3
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p, q := big.integer_from_u64(13).div_mod(big.integer_from_u64(9))
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assert p.int() == 1
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assert q.int() == 4
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c, d := big.integer_from_u64(7).div_mod(big.integer_from_u64(5))
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assert c.int() == 1
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assert d.int() == 2
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x1 := big.integer_from_string('2103180314840157') or { panic('Cannot read decimal') }
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y1 := big.integer_from_string('1631403814113') or { panic('Cannot read decimal') }
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q0 := big.integer_from_int(1289)
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r0 := big.integer_from_string('300798448500') or { panic('Cannot read decimal') }
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q1, r1 := x1.div_mod(y1)
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assert q1 == q0
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assert r1 == r0
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e := big.integer_from_string('21408410031413414147401') or { panic('Cannot read decimal') }
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f := big.integer_from_string('3130541314113413') or { panic('Cannot read decimal') }
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g, h := e.div_mod(f)
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assert g.str() == '6838564'
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assert h.str() == '2900204736088469'
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}
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fn test_comparison() {
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values := [-3, 13, 52, 6, 41]
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for value in values {
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x := big.integer_from_int(value)
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assert x == x
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assert x <= x
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assert x >= x
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}
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a := big.integer_from_int(-45)
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b := big.integer_from_int(35)
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assert a < b
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assert a <= b
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assert b > a
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assert b >= a
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}
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fn test_conversion() {
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ten := big.integer_from_int(10)
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mut n := big.integer_from_u64(u64(-1))
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mut digits := []rune{}
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for n.signum != 0 {
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quot, rem := n.div_mod(ten)
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digits << rune(rem.int()) + `0`
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n = quot
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}
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assert digits.reverse().string() == '18446744073709551615'
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}
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fn test_integer_from_string() {
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a := big.integer_from_string('00000000') or { panic('Zero int test fails') }
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assert a == big.zero_int
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b := big.integer_from_radix('00', 4) or { panic('Zero int test fails') }
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assert b == big.zero_int
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assert a == b
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string_values := ['0', '1', '0012', '1349173614', '+24', '-325']
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int_values := [0, 1, 12, 1349173614, 24, -325]
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for index in 0 .. string_values.len {
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x := big.integer_from_string(string_values[index]) or {
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panic('Could not convert decimal string')
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}
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y := big.integer_from_int(int_values[index])
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assert x == y
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}
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imin := big.integer_from_string('-2147483648') or {
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panic('Minimum signed 32-bit int test fails.')
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}
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assert imin.int() == -2147483648
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imax := big.integer_from_string('2147483647') or {
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panic('Maximum signed 32-bit int test fails.')
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}
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assert imax.int() == 2147483647
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}
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fn test_integer_from_powers_of_2() {
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assert (big.integer_from_radix('101010', 2) or { panic('Cannot read binary') }).int() == 42
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assert (big.integer_from_radix('1010', 2) or { panic('Cannot read binary') }).int() == 10
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assert (big.integer_from_radix('-0000101', 2) or { panic('Cannot read binary') }).int() == -5
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assert (big.integer_from_radix('CAFE', 16) or { panic('Cannot read hexadecimal') }).int() == 0xCAFE
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assert (big.integer_from_radix('DED', 16) or { panic('Cannot read hexadecimal') }).int() == 0xDED
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assert (big.integer_from_radix('-abcd', 16) or { panic('Cannot read hexadecimal') }).int() == -0xabcd
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}
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fn test_from_and_to_hex() {
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assert (big.integer_from_radix('123', 16) or { panic('Cannot read hexadecimal') }).hex() == '123'
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for i in 1 .. 33 {
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input := 'e'.repeat(i)
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output := (big.integer_from_radix(input, 16) or { panic('Cannot read hexadecimal') }).hex()
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assert input == output
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}
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assert (big.integer_from_string('0') or { panic('Cannot read decimal') }).str() == '0'
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}
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fn test_str() {
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assert big.integer_from_u64(255).str() == '255'
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assert big.integer_from_u64(127).str() == '127'
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assert big.integer_from_u64(1024).str() == '1024'
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assert big.integer_from_u64(4294967295).str() == '4294967295'
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assert big.integer_from_u64(4398046511104).str() == '4398046511104'
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assert big.integer_from_u64(u64(-1)).str() == '18446744073709551615'
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assert (big.integer_from_radix('e'.repeat(80), 16) or { panic('Cannot read hexadecimal') }).str() == '1993587900192849410235353592424915306962524220866209251950572167300738410728597846688097947807470'
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}
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fn test_exponentiation() {
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a := big.integer_from_int(2)
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assert a.pow(0).int() == 1
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assert a.pow(1).int() == 2
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assert a.pow(5).int() == 32
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assert a.pow(10).int() == 1024
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assert a.pow(30).int() == 1073741824
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exp_array := [u32(5), 7, 234, 524, 291, 13051]
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for exp in exp_array {
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expected := '1' + '0'.repeat(int(exp))
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actual := a.pow(exp)
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assert actual.binary_str() == expected
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}
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result := '66325146064916587705822805477951823674769212922003325230500180789514487101799702287247301347816140714887582527826252837635296749781071351621748491469338347097923896026211183517655658952346069454893422558286798338709431368762851475568899541999504754550056265493269010870696623999709399529395247064542825851568385196637089440522882877102429945439977107582295420418108331098961838419917230847980056560488541780255425015021238743932289115066701337398107639567748102191005710201353615093246958907555634902309636451244444952203735074916066229982498598205421944122042066749035283837586883383420374291325389757869347147357807188516650352693616763867685354382631931356465247637321960345782811272139101785279798666504361229957479336436466489780129445016691164329417001378480690804715301830926348058624'
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assert big.integer_from_int(324).pow(u32(315)).str() == result
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}
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fn test_mod_exponentiation() {
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divisor := big.integer_from_int(632)
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assert big.integer_from_int(324).mod_pow(u32(315), divisor) == big.integer_from_int(512)
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a := big.integer_from_int(65)
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b := big.integer_from_int(2790)
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div := big.integer_from_int(3233)
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assert a.mod_pow(17, div) == b
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assert b.mod_pow(413, div) == a
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}
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fn test_big_mod_exponentiation_1() {
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a := big.integer_from_int(23)
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b := big.integer_from_int(35)
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c := big.integer_from_int(4205)
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result := big.integer_from_int(552)
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assert a.big_mod_pow(b, c) == result
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}
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fn test_big_mod_exponentiation_2() {
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a := big.integer_from_string('2222589987119231759186196754430278233855361024') or {
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panic('Could not read big integer')
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}
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b := big.integer_from_string('3104719823194124242') or { panic('Could not read big integer') }
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c := big.integer_from_string('15121308410741') or { panic('Could not read big integer') }
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result := big.integer_from_string('487881863537') or { panic('Could not read big integer') }
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assert a.big_mod_pow(b, c) == result
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}
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fn test_big_mod_exponentiation_3() {
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a := big.integer_from_string('3192874698137469817346981364918346578619384619387463987413') or {
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panic('Could not read big integer')
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}
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b := big.integer_from_string('3104981983749813749137493871037') or {
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panic('Could not read big integer')
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}
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c := big.integer_from_string('2137476918375698711341313') or {
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panic('Could not read big integer')
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}
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result := big.integer_from_string('418107071760838517119254') or {
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panic('Could not read big integer')
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}
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assert a.big_mod_pow(b, c) == result
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}
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fn test_gcd() {
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assert big.integer_from_int(0).gcd(big.integer_from_int(0)) == big.zero_int
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assert big.integer_from_int(10).gcd(big.integer_from_int(0)) == big.integer_from_int(10)
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assert big.integer_from_int(0).gcd(big.integer_from_int(-18)) == big.integer_from_int(18)
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assert big.integer_from_int(51).gcd(big.integer_from_int(22)) == big.one_int
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assert big.integer_from_int(98).gcd(big.integer_from_int(56)) == big.integer_from_int(14)
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assert big.integer_from_int(98).gcd(big.integer_from_int(56)) == big.integer_from_int(14)
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a := big.integer_from_string('67116917544110') or { panic('Could not read decimal') }
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b := big.integer_from_string('60943431483592') or { panic('Could not read decimal') }
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c := big.integer_from_string('6299482') or { panic('Could not read decimal') }
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assert a.gcd(b) == c
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}
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fn test_factorial() {
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f5 := big.integer_from_u64(5).factorial()
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assert f5.hex() == '78'
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f100 := big.integer_from_u64(100).factorial()
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assert f100.hex() == '1b30964ec395dc24069528d54bbda40d16e966ef9a70eb21b5b2943a321cdf10391745570cca9420c6ecb3b72ed2ee8b02ea2735c61a000000000000000000000000'
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}
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fn test_inc_and_dec() {
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mut a := big.integer_from_int(2)
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mut b := big.integer_from_int(3)
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mut c := big.integer_from_int(4)
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a.inc()
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c.dec()
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assert a == b
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assert b == c
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}
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fn test_lshift() {
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assert big.integer_from_int(45).lshift(2) == big.integer_from_int(45 * 4)
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assert big.integer_from_int(45).lshift(3) == big.integer_from_int(45 * 8)
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assert big.integer_from_int(45).lshift(4) == big.integer_from_int(45 * 16)
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assert big.integer_from_int(45).lshift(5) == big.integer_from_int(45 * 32)
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assert big.integer_from_u64(0xabcedabcde).lshift(20) == big.integer_from_u64(0xabcedabcde00000)
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assert big.integer_from_bytes([u8(1), 1, 1]).lshift(56) == big.integer_from_bytes([
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u8(1),
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1,
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1,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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])
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}
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fn test_rshift() {
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assert big.integer_from_int(45).rshift(3) == big.integer_from_int(5)
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assert big.integer_from_int(0x13374956).rshift(16) == big.integer_from_int(0x1337)
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assert big.integer_from_bytes([
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u8(1),
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1,
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1,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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]).rshift(56) == big.integer_from_bytes([u8(1), 1, 1])
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}
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fn test_isqrt() {
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for i in 0 .. 1000 {
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a := big.integer_from_int(i)
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b := big.integer_from_int(i * i)
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assert b.isqrt() == a
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}
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values := [
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'314',
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'213149',
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'2198614',
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'318014',
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'1000000000',
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'1000131039410',
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'2148170394871039847019843349714981',
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]
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for value in values {
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a := big.integer_from_string(value) or { panic('Cannot read from decimal') }
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b := a * a
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assert b.isqrt() == a
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}
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}
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fn test_bitwise_ops() {
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a := big.integer_from_int(1).lshift(512)
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b := a - big.one_int
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assert a.bitwise_and(b) == big.zero_int
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assert b.bitwise_xor(b) == big.zero_int
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assert b.bitwise_or(b) == b
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assert b.bitwise_and(b) == b
|
|
assert b.bitwise_not() == big.zero_int
|
|
}
|
|
|
|
fn test_get_bit() {
|
|
x := big.integer_from_int(42)
|
|
assert x.get_bit(0) == false
|
|
assert x.get_bit(1) == true
|
|
assert x.get_bit(2) == false
|
|
assert x.get_bit(3) == true
|
|
assert x.get_bit(4) == false
|
|
assert x.get_bit(5) == true
|
|
assert x.get_bit(10) == false
|
|
|
|
values := ['1001001001001010010010100100100101011101001001010',
|
|
'1111111111111111111111111111111111111111111111111',
|
|
'0000000000000000000000000000000000000000010000', '1110010', '0001001']
|
|
for value in values {
|
|
a := big.integer_from_radix(value, 2) or { panic('Could not read binary') }
|
|
bits := []bool{len: value.len, init: value[value.len - 1 - index] == `1`}
|
|
for i in 0 .. value.len {
|
|
assert a.get_bit(i) == bits[i]
|
|
}
|
|
}
|
|
}
|
|
|
|
fn test_set_bit() {
|
|
mut a := big.integer_from_int(32)
|
|
a.set_bit(1, true)
|
|
assert a.int() == 34
|
|
a.set_bit(1, false)
|
|
a.set_bit(3, true)
|
|
assert a.int() == 40
|
|
a.set_bit(50, true)
|
|
assert a == big.one_int.lshift(50) + big.integer_from_int(40)
|
|
b := a
|
|
a.set_bit(100, false)
|
|
assert a == b
|
|
}
|
|
|
|
fn test_bit_len() ? {
|
|
assert big.zero_int.bit_len() == 0
|
|
assert big.one_int.bit_len() == 1
|
|
|
|
assert big.integer_from_u32(0xffffffff).bit_len() == 32
|
|
|
|
assert big.one_int.lshift(1239).bit_len() == 1240
|
|
|
|
mut num := big.integer_from_string('4338476092346017364013796407961305761039463198075691378460917856')!
|
|
assert num.bit_len() == 212
|
|
for num.bit_len() > 0 {
|
|
num = num.rshift(8)
|
|
assert true
|
|
}
|
|
}
|