as-bignum


WebAssembly fixed length big numbers written on AssemblyScript

$3

Provide wide numeric types such as u128, u256, i128, i256 and fixed points and also its arithmetic operations.

Namespace safe contain equivalents with overflow/underflow traps.

All kind of types pretty useful for economical and cryptographic usages and provide deterministic behavior.

$3

> yarn add as-bignum

or

> npm i as-bignum

$3

``ts
import { u128 } from "as-bignum/assembly";
// Before 0.20.x
// import { u128 } from "as-bignum";

declare function logF64(value: f64): void;
declare function logU128(hi: u64, lo: u64): void;

var a = u128.One;
var b = u128.from(-32); // same as u128.from(-32)
var c = new u128(0x1, -0xF);
var d = u128.from(0x0123456789ABCDEF); // same as u128.from(0x0123456789ABCDEF)
var e = u128.from('0x0123456789ABCDEF01234567');
var f = u128.fromString('11100010101100101', 2); // same as u128.from('0b11100010101100101')
var r = d / c + (b << 5) + e;

logF64(r.as());
logU128(r.hi, r.lo);
`

$3

`ts
TODO
`

$3

- [x] u128 unsigned type (tested)
- [ ] u256 unsigned type (very basic)
- [ ] i128 signed type
- [ ] i256 signed type

---

- [x] safe.u128 unsigned type (tested)

- [ ] safe.u256 unsigned type
- [ ] safe.i128 signed type
- [ ] safe.i256 signed type

---

- [ ] fp128 generic fixed point signed type٭ (very basic for now)
- [ ] fp256 generic fixed point signed type٭

---

- [ ] safe.fp128 generic fixed point signed type٭
- [ ] safe.fp256 generic fixed point signed type٭

٭ _typename_ Q` _is a type representing count of fractional bits_