swh:1:snp:a72e953ecd624a7df6e6196bbdd05851996c5e40
Tip revision: a7b73fca6a308d84baa63c3b42dc6477f9cfbc18 authored by Fredrik Ekre on 15 May 2021, 09:48:09 UTC
[doc] fix keyword argument in docs for current_exceptions.
[doc] fix keyword argument in docs for current_exceptions.
Tip revision: a7b73fc
gmp.jl
# This file is a part of Julia. License is MIT: https://julialang.org/license
using Random, Serialization
a = parse(BigInt,"123456789012345678901234567890")
b = parse(BigInt,"123456789012345678901234567891")
c = parse(BigInt,"246913578024691357802469135780")
d = parse(BigInt,"-246913578024691357802469135780")
ee = typemax(Int64)
@testset "basics" begin
@test BigInt <: Signed
@test big(1) isa Signed
let x = big(1)
@test signed(x) === x
@test convert(Signed, x) === x
@test Signed(x) === x
@test_throws MethodError convert(Unsigned, x) # could change in the future
end
@test a+BigInt(1) == b
@test typeof(a+1) == BigInt
@test a+1 == b
@test isequal(a+1, b)
@test b == a+1
@test !(b == a)
@test b > a
@test b >= a
@test !(b < a)
@test !(b <= a)
@test typeof(a * 2) == BigInt
@test a*2 == c
@test c-a == a
@test c == a + a
@test c+1 == a+b
@test typeof(d) == BigInt
@test d == -c
@test typeof(BigInt(ee)) == BigInt
@test BigInt(ee)+1 == parse(BigInt,"9223372036854775808")
@testset "printing" begin
#Multiple calls for sanity check, since we're doing direct memory manipulation
@test string(a) == "123456789012345678901234567890"
@test string(b) == "123456789012345678901234567891"
@test string(c) == "246913578024691357802469135780"
@test string(d) == "-246913578024691357802469135780"
@test string(a) == "123456789012345678901234567890"
end
@testset "constructors" begin
@test typeof(BigInt(typemax(Int8))) == BigInt
@test typeof(BigInt(typemax(Int16))) == BigInt
@test typeof(BigInt(typemax(Int32))) == BigInt
@test typeof(BigInt(typemax(Int64))) == BigInt
@test typeof(BigInt(typemax(Int128))) == BigInt
@test typeof(BigInt(true)) == BigInt
@test typeof(BigInt(typemax(UInt8))) == BigInt
@test typeof(BigInt(typemax(UInt16))) == BigInt
@test typeof(BigInt(typemax(UInt32))) == BigInt
@test typeof(BigInt(typemax(UInt64))) == BigInt
@test typeof(BigInt(typemax(UInt128))) == BigInt
@test typeof(BigInt(BigInt(1))) == BigInt
for x in (Int16(0), 1, 3//4, big(5//6), big(9))
@test big(typeof(x)) == typeof(big(x))
@test big(typeof(complex(x, x))) == typeof(big(complex(x, x)))
end
end
@testset "division" begin
oz = big(1 // 0)
zo = big(0 // 1)
@test_throws DivideError() oz / oz
@test oz == oz / one(oz)
@test -oz == oz / (-one(oz))
@test zero(oz) == one(oz) / oz
@test_throws DivideError() zo / zo
@test one(zo) / zo == big(1//0)
@test -one(zo) / zo == big(-1//0)
end
end
@testset "div, fld, mod, rem" begin
for i = -10:10, j = [-10:-1; 1:10]
@test div(BigInt(i), BigInt(j)) == div(i,j)
@test fld(BigInt(i), BigInt(j)) == fld(i,j)
@test mod(BigInt(i), BigInt(j)) == mod(i,j)
@test rem(BigInt(i), BigInt(j)) == rem(i,j)
end
end
@testset "copysign / sign" begin
x = BigInt(1)
y = BigInt(-1)
@test copysign(x, y) == y
@test copysign(y, x) == x
@test sign(BigInt(-3)) == -1
@test sign(BigInt( 0)) == 0
@test sign(BigInt( 3)) == 1
end
@testset "Signed addition" begin
@test a+Int8(1) == b
@test a+Int16(1) == b
@test a+Int32(1) == b
@test a+Int64(1) == b
@test a+Int128(1) == b
@test Int8(1)+ a == b
@test Int16(1)+a == b
@test Int32(1)+a == b
@test Int64(1)+a == b
@test b+Int8(-1) == a
@test b+Int16(-1) == a
@test b+Int32(-1) == a
@test b+Int64(-1) == a
@test Int8(-1)+ b == a
@test Int16(-1)+b == a
@test Int32(-1)+b == a
@test Int64(-1)+b == a
end
@testset "Unsigned addition" begin
@test a+true == b
@test a+UInt8(1) == b
@test a+UInt16(1) == b
@test a+UInt32(1) == b
@test a+UInt64(1) == b
@test a+UInt128(1) == b
@test true+a == b
@test UInt8(1)+ a == b
@test UInt16(1)+a == b
@test UInt32(1)+a == b
@test UInt64(1)+a == b
end
@testset "Signed subtraction" begin
@test b-Int8(1) == a
@test b-Int16(1) == a
@test b-Int32(1) == a
@test b-Int64(1) == a
@test Int8(1)- b == -a
@test Int16(1)-b == -a
@test Int32(1)-b == -a
@test Int64(1)-b == -a
@test a-Int8(-1) == b
@test a-Int16(-1) == b
@test a-Int32(-1) == b
@test a-Int64(-1) == b
@test Int8(-1)- a == -b
@test Int16(-1)-a == -b
@test Int32(-1)-a == -b
@test Int64(-1)-a == -b
end
@testset "Unsigned subtraction" begin
@test b-true == a
@test b-UInt8(1) == a
@test b-UInt16(1) == a
@test b-UInt32(1) == a
@test b-UInt64(1) == a
@test true-b == -a
@test UInt8(1)- b == -a
@test UInt16(1)-b == -a
@test UInt32(1)-b == -a
@test UInt64(1)-b == -a
end
@testset "Signed multiplication" begin
@test a*Int8(1) == a
@test a*Int16(1) == a
@test a*Int32(1) == a
@test a*Int64(1) == a
@test Int8(1)* a == a
@test Int16(1)*a == a
@test Int32(1)*a == a
@test Int64(1)*a == a
@test a*Int8(-1) == -a
@test a*Int16(-1) == -a
@test a*Int32(-1) == -a
@test a*Int64(-1) == -a
@test Int8(-1)* a == -a
@test Int16(-1)*a == -a
@test Int32(-1)*a == -a
@test Int64(-1)*a == -a
end
@testset "Unsigned multiplication" begin
@test a*true == a
@test a*UInt8(1) == a
@test a*UInt16(1) == a
@test a*UInt32(1) == a
@test a*UInt64(1) == a
@test true*a == a
@test UInt8(1)* a == a
@test UInt16(1)*a == a
@test UInt32(1)*a == a
@test UInt64(1)*a == a
end
@testset "bitshifts" begin
@test BigInt(5) << 3 == 40
@test BigInt(5) >> 1 == 2
@test BigInt(-5) << 3 == -40
@test BigInt(-5) >> 1 == -3
@test BigInt(5) >> -3 == 40
@test BigInt(5) << -1 == 2
@test BigInt(-5) >> -3 == -40
@test BigInt(-5) << -1 == -3
end
@testset "boolean ops" begin
@test ~BigInt(123) == -124
@test BigInt(123) & BigInt(234) == 106
@test BigInt(123) | BigInt(234) == 251
@test BigInt(123) ⊻ BigInt(234) == 145
@test gcd(BigInt(48), BigInt(180)) == 12
@test lcm(BigInt(48), BigInt(180)) == 720
end
@testset "combinatorics" begin
@test factorial(BigInt(40)) == parse(BigInt,"815915283247897734345611269596115894272000000000")
@test binomial(BigInt(1), -1) == BigInt(0)
@test binomial(BigInt(1), 2) == BigInt(0)
@test binomial(BigInt(-53), 42) == parse(BigInt,"959509335087854414441273718")
@test binomial(BigInt(113), BigInt(42)) == parse(BigInt,"18672199984318438125634054194360")
end
let a, b
a = rand(1:100, 10000)
b = map(BigInt, a)
@test sum(a) == sum(b)
end
@testset "Iterated arithmetic" begin
local a, b, c, d, f, g
a = parse(BigInt,"315135")
b = parse(BigInt,"12412")
c = parse(BigInt,"3426495623485904783478347")
d = parse(BigInt,"-1398984130")
f = parse(BigInt,"2413804710837418037418307081437315263635345357386985747464")
g = parse(BigInt,"-1")
@test +(a, b) == parse(BigInt,"327547")
@test +(a, b, c) == parse(BigInt,"3426495623485904783805894")
@test +(a, b, c, d) == parse(BigInt,"3426495623485903384821764")
@test +(a, b, c, d, f) == parse(BigInt,"2413804710837418037418307081437318690130968843290370569228")
@test +(a, b, c, d, f, g) == parse(BigInt,"2413804710837418037418307081437318690130968843290370569227")
@test *(a, b) == parse(BigInt,"3911455620")
@test *(a, b, c) == parse(BigInt,"13402585563389346256121263521460140")
@test *(a, b, c, d) == parse(BigInt,"-18750004504148804423388563022070650287578200")
@test *(a, b, c, d, f) == parse(BigInt,"-45258849200337190631492857400003938881995610529251881450243326128168934937055005474972396281351684800")
@test *(a, b, c, d, f, g) == parse(BigInt,"45258849200337190631492857400003938881995610529251881450243326128168934937055005474972396281351684800")
@test xor(a, b) == parse(BigInt,"327299")
@test xor(a, b, c) == parse(BigInt,"3426495623485904783798472")
@test xor(a, b, c, d) == parse(BigInt,"-3426495623485906178489610")
@test xor(a, b, c, d, f) == parse(BigInt,"-2413804710837418037418307081437316711364709261074607933698")
@test xor(a, b, c, d, f, g) == parse(BigInt,"2413804710837418037418307081437316711364709261074607933697")
@test nand(a, b) == parse(BigInt,"-125")
@test ⊼(a, b) == parse(BigInt,"-125")
@test nor(a, b) == parse(BigInt,"-327424")
@test ⊽(a, b) == parse(BigInt,"-327424")
@test (&)(a, b) == parse(BigInt,"124")
@test (&)(a, b, c) == parse(BigInt,"72")
@test (&)(a, b, c, d) == parse(BigInt,"8")
@test (&)(a, b, c, d, f) == parse(BigInt,"8")
@test (&)(a, b, c, d, f, g) == parse(BigInt,"8")
@test (|)(a, b) == parse(BigInt,"327423")
@test (|)(a, b, c) == parse(BigInt,"3426495623485904783802111")
@test (|)(a, b, c, d) == parse(BigInt,"-1396834561")
@test (|)(a, b, c, d, f) == parse(BigInt,"-1358954753")
@test (|)(a, b, c, d, f, g) == parse(BigInt,"-1")
@test trailing_ones(a) == 8
@test trailing_zeros(b) == 2
@test count_ones(a) == 14
end
# Large Fibonacci to exercise BigInt
# from Bill Hart, https://groups.google.com/group/julia-dev/browse_frm/thread/798e2d1322daf633
function mul(a::Vector{BigInt}, b::Vector{BigInt})
x = a[2]*b[2]
c = Vector{BigInt}(undef, 3)
c[1] = a[1]*b[1] + x
c[2] = a[1]*b[2] + a[2]*b[3]
c[3] = x + a[3]*b[3]
return c
end
function bigfib(n)
n == 0 && return BigInt(0)
n -= 1
r = [BigInt(1), BigInt(1), BigInt(0)]
s = [BigInt(1), BigInt(0), BigInt(1)]
while true
(n & 1) == 1 && (s = mul(s,r))
(n >>= 1) == 0 && return s[1]
r = mul(r,r)
end
end
@test [bigfib(n) for n=0:10] == [0,1,1,2,3,5,8,13,21,34,55]
let s, n = bigfib(1000001)
@test ndigits(n) == 208988
@test mod(n,big(10)^15) == 359244926937501
@test div(n,big(10)^208973) == 316047687386689
s = string(n)
@test length(s) == 208988
@test endswith(s, "359244926937501")
@test startswith(s, "316047687386689")
end
@testset "digits" begin
n = Int64(2080310129088201558)
N = big(n)
for base in (2,7,10,11,16,30,50,62,64,100), pad in (0,1,10,100)
@test digits(n; base, pad) == digits(N; base, pad)
@test digits(-n; base, pad) == digits(-N; base, pad)
@test digits!(Vector{Int}(undef, pad), n; base) == digits!(Vector{Int}(undef, pad), N; base)
end
end
# serialization (#5133)
let n = parse(BigInt, "359334085968622831041960188598043661065388726959079837"),
b = IOBuffer()
serialize(b, n)
seek(b, 0)
@test deserialize(b) == n
end
@testset "issue #5873" begin
@test ndigits(big(90)) == 2
@test ndigits(big(99)) == 2
ndigits_mismatch(n) = ndigits(n) != ndigits(BigInt(n))
@test !any(ndigits_mismatch, 8:9)
@test !any(ndigits_mismatch, 64:99)
@test !any(ndigits_mismatch, 512:999)
@test !any(ndigits_mismatch, 8192:9999)
end
# The following should not crash (#16579)
ndigits(big(rand(Int)), base=rand(63:typemax(Int)))
ndigits(big(rand(Int)), base=big(2)^rand(2:999))
for x in big.([-20:20; rand(Int)])
for _base in -1:1
@test_throws DomainError ndigits(x, base=_base)
end
end
@test Base.ndigits0zpb(big(0), big(rand(2:100))) == 0
# digits with BigInt bases (#16844)
@test digits(big(2)^256, base = big(2)^128) == [0, 0, 1]
@testset "conversion from float" begin
@test BigInt(2.0) == BigInt(2.0f0) == BigInt(big(2.0)) == 2
@test_throws InexactError convert(BigInt, 2.1)
@test_throws InexactError convert(BigInt, big(2.1))
end
@testset "issue #13367" begin
@test trunc(BigInt,2.1) == 2
@test round(BigInt,2.1) == 2
@test floor(BigInt,2.1) == 2
@test ceil(BigInt,2.1) == 3
@test trunc(BigInt,2.1f0) == 2
@test round(BigInt,2.1f0) == 2
@test floor(BigInt,2.1f0) == 2
@test ceil(BigInt,2.1f0) == 3
@test_throws InexactError trunc(BigInt,Inf)
@test_throws InexactError round(BigInt,Inf)
@test_throws InexactError floor(BigInt,Inf)
@test_throws InexactError ceil(BigInt,Inf)
@test string(big(3), base = 2) == "11"
@test string(big(9), base = 8) == "11"
@test string(-big(9), base = 8) == "-11"
@test string(big(12), base = 16) == "c"
end
@testset "Issue #18849" begin
# bin, oct, dec, hex should not call sizeof on BigInts
# when padding is desired
padding = 4
low = big(4)
high = big(2^20)
@test string(low, pad = padding, base = 2) == "0100"
@test string(low, pad = padding, base = 8) == "0004"
@test string(low, pad = padding, base = 10) == "0004"
@test string(low, pad = padding, base = 16) == "0004"
@test string(high, pad = padding, base = 2) == "100000000000000000000"
@test string(high, pad = padding, base = 8) == "4000000"
@test string(high, pad = padding, base = 10) == "1048576"
@test string(high, pad = padding, base = 16) == "100000"
@test string(-low, pad = padding, base = 2) == "-0100" # handle negative numbers correctly
@test string(-low, pad = padding, base = 8) == "-0004"
@test string(-low, pad = padding, base = 10) == "-0004"
@test string(-low, pad = padding, base = 16) == "-0004"
@test string(-high, pad = padding, base = 2) == "-100000000000000000000"
@test string(-high, pad = padding, base = 8) == "-4000000"
@test string(-high, pad = padding, base = 10) == "-1048576"
@test string(-high, pad = padding, base = 16) == "-100000"
end
# respect 0-padding on big(0)
for base in (2, 8, 10, 16)
local base
@test string(big(0), base=base, pad=0) == ""
end
@test string(big(0), base = rand(2:62), pad = 0) == ""
@test isqrt(big(4)) == 2
@test isqrt(big(5)) == 2
@test big(5)^true == big(5)
@test big(5)^false == one(BigInt)
@testset "math ops returning BigFloat" begin
# operations that when applied to Int64 give Float64, should give BigFloat
@test typeof(exp(a)) == BigFloat
@test typeof(exp2(a)) == BigFloat
@test typeof(exp10(a)) == BigFloat
@test typeof(expm1(a)) == BigFloat
@test typeof(cosh(a)) == BigFloat
@test typeof(sinh(a)) == BigFloat
@test typeof(tanh(a)) == BigFloat
@test typeof(sech(a)) == BigFloat
@test typeof(csch(a)) == BigFloat
@test typeof(coth(a)) == BigFloat
@test typeof(cbrt(a)) == BigFloat
@test typeof(tan(a)) == BigFloat
@test typeof(cos(a)) == BigFloat
@test typeof(sin(a)) == BigFloat
end
# Issue #24298
@test mod(BigInt(6), UInt(5)) == mod(6, 5)
@test iseven(zero(BigInt))
@test isodd(BigInt(typemax(UInt)))
@testset "cmp has values in [-1, 0, 1], issue #28780" begin
# _rand produces values whose log2 is better distributed than rand
_rand(::Type{BigInt}, n=1000) = let x = big(2)^rand(1:rand(1:n))
rand(-x:x)
end
_rand(F::Type{<:AbstractFloat}) = F(_rand(BigInt, round(Int, log2(floatmax(F))))) + rand(F)
_rand(T) = rand(T)
for T in (Base.BitInteger_types..., BigInt, Float64, Float32, Float16)
@test cmp(big(2)^130, one(T)) === 1
@test cmp(-big(2)^130, one(T)) === -1
c = cmp(_rand(BigInt), _rand(T))
@test c ∈ (-1, 0, 1)
@test c isa Int
(T <: Integer && T !== BigInt) || continue
x = rand(T)
@test cmp(big(2)^130, x) === cmp(x, -big(2)^130) === 1
@test cmp(-big(2)^130, x) === cmp(x, big(2)^130) === -1
@test cmp(big(x), x) === cmp(x, big(x)) === 0
end
c = cmp(_rand(BigInt), _rand(BigInt))
@test c ∈ (-1, 0, 1)
@test c isa Int
end
@testset "generic conversion from Integer" begin
x = rand(Int128)
@test BigInt(x) % Int128 === x
y = rand(UInt128)
@test BigInt(y) % UInt128 === y
end
@testset "conversion from typemin(T)" begin
@test big(Int8(-128)) == big"-128"
@test big(Int16(-32768)) == big"-32768"
@test big(Int32(-2147483648)) == big"-2147483648"
@test big(Int64(-9223372036854775808)) == big"-9223372036854775808"
@test big(Int128(-170141183460469231731687303715884105728)) == big"-170141183460469231731687303715884105728"
end
@testset "type conversion with Signed, Unsigned" begin
x = BigInt(typemin(Int128)) - 1
@test x % Signed === x
@test_throws MethodError x % Unsigned
y = BigInt(1)
@test y % Signed === y
@test_throws MethodError y % Unsigned
end
@testset "conversion to Float" begin
x = big"2"^256 + big"2"^(256-53) + 1
@test Float64(x) == reinterpret(Float64, 0x4ff0000000000001)
@test Float64(-x) == -Float64(x)
x = (x >> 1) + 1
@test Float64(x) == reinterpret(Float64, 0x4fe0000000000001)
@test Float64(-x) == -Float64(x)
x = big"2"^64 + big"2"^(64-24) + 1
@test Float32(x) == reinterpret(Float32, 0x5f800001)
@test Float32(-x) == -Float32(x)
x = (x >> 1) + 1
@test Float32(x) == reinterpret(Float32, 0x5f000001)
@test Float32(-x) == -Float32(x)
x = big"2"^15 + big"2"^(15-11) + 1
@test Float16(x) == reinterpret(Float16, 0x7801)
@test Float16(-x) == -Float16(x)
x = (x >> 1) + 1
@test Float16(x) == reinterpret(Float16, 0x7401)
@test Float16(-x) == -Float16(x)
for T in (Float16, Float32, Float64)
n = exponent(floatmax(T))
@test T(big"2"^(n+1)) === T(Inf)
@test T(big"2"^(n+1) - big"2"^(n-precision(T))) === T(Inf)
@test T(big"2"^(n+1) - big"2"^(n-precision(T)) - 1) === floatmax(T)
end
end