123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869 |
- import { defineProperties } from "../../utils/properties.js";
- import { Typed } from "../typed.js";
- import { Coder } from "./abstract-coder.js";
- import { pack, unpack } from "./array.js";
- import type { Reader, Writer } from "./abstract-coder.js";
- /**
- * @_ignore
- */
- export class TupleCoder extends Coder {
- readonly coders!: ReadonlyArray<Coder>;
- constructor(coders: Array<Coder>, localName: string) {
- let dynamic = false;
- const types: Array<string> = [];
- coders.forEach((coder) => {
- if (coder.dynamic) { dynamic = true; }
- types.push(coder.type);
- });
- const type = ("tuple(" + types.join(",") + ")");
- super("tuple", type, localName, dynamic);
- defineProperties<TupleCoder>(this, { coders: Object.freeze(coders.slice()) });
- }
- defaultValue(): any {
- const values: any = [ ];
- this.coders.forEach((coder) => {
- values.push(coder.defaultValue());
- });
- // We only output named properties for uniquely named coders
- const uniqueNames = this.coders.reduce((accum, coder) => {
- const name = coder.localName;
- if (name) {
- if (!accum[name]) { accum[name] = 0; }
- accum[name]++;
- }
- return accum;
- }, <{ [ name: string ]: number }>{ });
- // Add named values
- this.coders.forEach((coder: Coder, index: number) => {
- let name = coder.localName;
- if (!name || uniqueNames[name] !== 1) { return; }
- if (name === "length") { name = "_length"; }
- if (values[name] != null) { return; }
- values[name] = values[index];
- });
- return Object.freeze(values);
- }
- encode(writer: Writer, _value: Array<any> | { [ name: string ]: any } | Typed): number {
- const value = Typed.dereference(_value, "tuple");
- return pack(writer, this.coders, value);
- }
- decode(reader: Reader): any {
- return unpack(reader, this.coders);
- }
- }
|