mod.ts

const ENCODER = new TextEncoder
const HEAP = 16 * 1024
const SEED_LENGTH = 8
const DEFAULT_SEED = new Uint8Array(SEED_LENGTH) // default to zeros

const DIGEST_DATA = new Uint8Array(BigUint64Array.BYTES_PER_ELEMENT)
const DIGEST_VIEW = new DataView(DIGEST_DATA.buffer)

type Data = Uint8Array | string
type Digests = Uint8Array | bigint | string
type InternalHasher = {
    Hash_GetBuffer: () => number,
    Hash_Init: () => undefined,
    Hash_Update: (length: number) => any,
    Hash_Final: () => undefined
}

export interface Hasher {
    reset: () => Hasher
    reseed: (seed: Uint8Array) => Hasher
    update: (data: Data) => Hasher
    digest: (format?: string) => Digests
    hash: (data: Data, format?: string) => Digests
}

class XXHasher implements Hasher {
    private internal: InternalHasher
    private memory: Uint8Array
    private seed: Uint8Array

    constructor(instance: WebAssembly.Instance, seed: Uint8Array) {
        this.internal = instance.exports as InternalHasher
        this.memory = new Uint8Array(
            (instance.exports.memory as WebAssembly.Memory).buffer,
            this.internal.Hash_GetBuffer(), HEAP
        )
        this.seed = seed
        this.reset()
    }

    reset() {
        this.memory.set(this.seed)
        this.internal.Hash_Init()
        return this
    }

    reseed(seed: Uint8Array) {
        this.seed = seed
        return this.reset()
    }

    update(data: Data) {
        if (typeof data === 'string') data = ENCODER.encode(data)

        let updated = 0
        while (updated < data.length) {
            const block = data.subarray(updated, updated + HEAP)
            this.memory.set(block)
            this.internal.Hash_Update(block.length)
            updated += block.length
        }
        return this
    }

    digest(format: string = 'raw'): Digests {
        this.internal.Hash_Final()
        const length = DIGEST_DATA.byteLength

        if (format === 'bigint') {
            DIGEST_DATA.set(this.memory.subarray(0, length))
            // read digest bytes as a little-endian uint64
            return DIGEST_VIEW.getBigUint64(0, true)
        }

        if (format === 'hex') {
            // return digest as a hex string
            return [...this.memory.subarray(0, length)].map(
                b => b.toString(16).padStart(2, '0')
            ).join('')
        }

        // return a copy of the raw digest bytes
        return this.memory.slice(0, length)
    }

    hash(data: Data, format: string = 'raw'): Digests {
        return this.reset().update(data).digest(format)
    }
}

// xxHash64 WASM implementation from https://github.com/Daninet/hash-wasm/blob/master/src/xxhash64.c (4.10.0)
const WASM2 = "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"

// xxHash3 WASM implementation from https://github.com/Daninet/hash-wasm/blob/master/src/xxhash3.c (4.10.0)
const WASM3 = "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"

function fromBase64(base64: string) {
    return Uint8Array.from(atob(base64), char => char.charCodeAt(0))
}

const XXHash64 = WebAssembly.compile(fromBase64(WASM2))
const XXHash3 = WebAssembly.compile(fromBase64(WASM3))

type SeedData = Iterable<unknown>
function generateSeed(data: SeedData): Uint8Array {
    const seed = new Uint8Array(SEED_LENGTH)
    let index = 0
    for (const item of data) seed[index++ % SEED_LENGTH] ^= item as number
    return seed
}

async function construct(
    code: WebAssembly.Module,
    seedData?: SeedData
): Promise<Hasher> {
    const instance = await WebAssembly.instantiate(code)
    const seed = seedData ? generateSeed(seedData) : DEFAULT_SEED
    return new XXHasher(instance, seed)
}

export async function create(seedData?: SeedData): Promise<Hasher> {
    return construct(await XXHash64, seedData)
}

export async function create3(seedData?: SeedData): Promise<Hasher> {
    return construct(await XXHash3, seedData)
}