Class LongArray

g2all/900/module/view.js:159–201

export class Word extends VariableMixin(View4) {}

export class LongArray {
    constructor(length) {
        this.buffer = new DataView(new ArrayBuffer(length * 8));
    }

    get addr() {
        return mt.get_view_vector(this.buffer);
    }

    addr_at(index) {
        return this.addr.add(index * 8);
    }

    get length() {
        return this.buffer.length / 8;
    }

    get size() {
        return this.buffer.byteLength;
    }

    get byteLength() {
        return this.size;
    }

    get(index) {
        const buffer = this.buffer;
        const base = index * 8;
        return new Int(
            buffer.getUint32(base, true),
            buffer.getUint32(base + 4, true),
        );
    }

    set(index, value) {
        const buffer = this.buffer;
        const base = index * 8;
        const values = lohi_from_one(value);

        buffer.setUint32(base, values[0], true);
        buffer.setUint32(base + 4, values[1], true);
    }
}

// mutable Int (we are explicitly using Int's private fields)
const Word64Mixin = superclass => class extends superclass {