Class BufferView

g2all/900/module/rw.js:29–63

// instances of BufferView will their have m_mode set to WastefulTypedArray
// since we use the .buffer getter to create a DataView
export class BufferView extends Uint8Array {
    constructor(...args) {
        super(...args);
        this._dview = new DataView(this.buffer, this.byteOffset);
    }

    read16(offset) {
        return this._dview.getUint16(offset, true);
    }

    read32(offset) {
        return this._dview.getUint32(offset, true);
    }

    read64(offset) {
        return new Int(
            this._dview.getUint32(offset, true),
            this._dview.getUint32(offset + 4, true),
        );
    }

    write16(offset, value) {
        this._dview.setUint16(offset, value, true);
    }

    write32(offset, value) {
        this._dview.setUint32(offset, value, true);
    }

    write64(offset, value) {
        const values = lohi_from_one(value);
        this._dview.setUint32(offset, values[0], true);
        this._dview.setUint32(offset + 4, values[1], true);
    }
}

// WARNING: These functions are now deprecated. use BufferView instead.