int64_t

64bit integer in pure Javascript


Usage

Int64 is the class which is a 64bit signed interger.
UInt64 is the class which is a 64bit unsigned interger.

``js
const { Int64, UInt64 } = require('int64_t');
let i = new Int64(0x12345678, 0x9abcdef0);
console.log(i.toString()); // 1311768467463790320
`

Constructor

Int64 & UInt64

* new Int64(buffer)
`js
let i = new Int64(Buffer.from([
0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0
]);
`

* new Int64(high, low)
`js
let i = new Int64(0x12345678, 0x9abcdef0);
`
　:warning: negative number is unacceptable

* new Int64(int)
`js
let i = new Int64(0x123456789)
`
　:warning: up to 2^53 - 1

Feature

$3

* add(int64) (+)
`js
let i1 = new Int64(0x12345678, 0x9abcdef0);
let i2 = new Int64(0x11111111, 0x11111111);
console.log(i1.add(i2).toString(16, true)); // 0x23456789abcdf001
`

* sub(int64) (-)
`js
let i1 = new Int64(0x12345678, 0x9abcdef0);
let i2 = new Int64(0x11111111, 0x11111111);
console.log(i1.sub(i2).toString(16, true)); // 0x123456789abcddf
`

mul(int64) ()
`js
let i1 = new Int64(0xf, 0x1234567678);
let i2 = new Int64(0x0, 0xf);
console.log(i1.mul(i2).toString(16, true)); // 0xe211111108
`

* div(int64) (/)
`js
let i1 = new Int64(0x12345678, 0x9abcdef0);
let i2 = new Int64(0x0, 0xf);
console.log(i1.div(i2).toString(16, true)); // 0x136b06e70b74210
`

* mod(int64) (%)
`js
let i1 = new Int64(0x12345678, 0x9abcdef0);
let i2 = new Int64(0x0, 0xe);
console.log(i1.mod(i2).toString(16, true)); // 0xc
`

$3

* and(int64) (&)
`js
let i = new UInt64(0x12345678, 0x9abcdef0);
console.log(i.add(new UInt64(0x0f0f0f0f, 0x0f0f0f0f)).toString(16, true)); // 0x020406080a0c0e00
`

* or(int64) (|)
`js
let i = new UInt64(0x12345678, 0x9abcdef0);
console.log(i.or(new UInt64(0x0f0f0f0f, 0x0f0f0f0f)).toString(16, true)); // 0x1f3f5f7f9fbfdfff
`

* xor(int64) (^)
`js
let i = new UInt64(0x12345678, 0x9abcdef0);
console.log(i.xor(new UInt64(0xffffffff, 0xffffffff)).toString(16, true)); // 0xedcba9876543210f
`

* shiftRight(number, logical) (>>, >>>)
`js
let i = new Int64(0x89abcdef, 0x01234567);
console.log(i.toShiftRight(1).toString(16, true)); // -0x3b2a19087f6e5d4d
console.log(i.toShiftRight(1, true).toString(16, true)); // 0x44d5e6f78091a2b3
`

* shiftLeft(number) (<<)
`js
let i = new Int64(0x12345678, 0x9abcdef0);
console.log(i.toShiftLeft(1).toString(16, true)); // 0x2468acf13579bde0
`

$3


* equal(i)
`js
let i = new UInt64(0x12345678, 0x9abcdef0);
console.log(i.equal(new UInt64(0x12345678, 0x9abcdef0))); // bool: true
console.log(i.equal(new UInt64(0x12345678, 0x9abcdef1))); // bool: false
console.log(i.equal(new UInt64(0x12345679, 0x9abcdef0))); // bool: false
console.log(i.equal(new Int64(0x12345678, 0x9abcdef0))); // bool: false
`

* compare(i)
`js
let i = new UInt64(0x12345678, 0x9abcdef0);
console.log(i.compare(new UInt64(0x12345678, 0x0))); // 1
console.log(i.compare(new UInt64(0x20000000, 0x0))); // -1
console.log(i.compare(new UInt64(0x12345678, 0x9abcdef0))); // 0
`

$3

* toString(radix, prefix)
default radix is 10
default prefix is false
`js
let i = new Int64(0x12345678, 0x9abcdef0);
console.log(i.toString()); //
console.log(i.toString(16)); // 123456789abcdef0
console.log(i.toString(16, true); // 0x123456789abcdef0
`

* toBuffer()
`js
let i = new Int64(0x12345678, 0x9abcdef0);
console.log(i.toBuffer()); //
`

* toUnsigned(), toSigned()
`js
let i = new Int64(0x12345678, 0x9abcdef0);
let ui = i.toUnsigned();
console.log(ui); // UInt64 { buffer: }
console.log(ui.toSigned()); // Int64 { buffer: }
`

* toNegative() (only Int64)
`js
let i = new Int64(0x12345678, 0x9abcdef0);
console.log(i.toNegative()); // Int64 { buffer: }
`

* isNegative() (only Int64)
`js
let i = new Int64(0x890abcde, 0xf1234567)
console.log(i.isNegative()); // bool: true
``

License

MIT