ts-mls/dist/codec/optional.js

[](https://github.com/LukaJCB/ts-mls/actions/workflows/ci.yml) [](https://badge.fury.io/js/ts-mls) [![Coverage Status](https://co

import { concatUint8Arrays } from "../util/byteArray.js";
import { decodeUint8, encodeUint8 } from "./number.js";
export function encodeOptional(encodeT) {
    return (t) => (t ? prependPresenceOctet(encodeT(t)) : new Uint8Array([0x0]));
}
export function decodeOptional(decodeT) {
    return (b, offset) => {
        const presenceOctet = decodeUint8(b, offset)?.[0];
        if (presenceOctet == 1) {
            const result = decodeT(b, offset + 1);
            return result === undefined ? undefined : [result[0], result[1] + 1];
        }
        else {
            return [undefined, 1];
        }
    };
}
function prependPresenceOctet(v) {
    return concatUint8Arrays(encodeUint8(0x1), v);
}
//# sourceMappingURL=optional.js.map