thematic-earth/gcslib/serializers/builders/byte-builder.class.js

HTML-based, whole-Earth thematic maps using locally hosted data layers

/* Copyright (c) 2023 Read Write Tools. Legal use subject to the Thematic Earth Software License Agreement. */
import expect from'../../softlib/expect.js';import aver from'../../softlib/aver.js';import terminal from'../../softlib/terminal.js';export default class ByteBuilder extends Array{constructor(){super()}push(e){expect(e,'Uint8Array'),super.push(e)}get itemCount(){return super.length}get byteSize(){var e=0;for(let r of this)e+=r.byteLength;return e}build(){var e=new ArrayBuffer(this.byteSize),r=new Uint8Array(e);let t=0;for(let e of this)r.set(e,t),t+=e.byteLength;return r}writeText(e){expect(e,['String','null','undefined']),null!=e&&null!=e||(e='');const r=(new TextEncoder).encode(e);this.push(r)}writeMarker(e){expect(e,'Uint8Array'),this.push(e)}writeInt8(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<=127),aver(e>=-128);var r=new ArrayBuffer(1);new DataView(r).setInt8(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeInt16(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<=32767),aver(e>=-32768);var r=new ArrayBuffer(2);new DataView(r).setInt16(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeInt32(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<=2147483647),aver(e>=-2147483648);var r=new ArrayBuffer(4);new DataView(r).setInt32(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeUint8(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<256),aver(e>=0);var r=new ArrayBuffer(1);new DataView(r).setUint8(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeUint16(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<65536),aver(e>=0);var r=new ArrayBuffer(2);new DataView(r).setUint16(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeUint32(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<4294967296),aver(e>=0);var r=new ArrayBuffer(4);new DataView(r).setUint32(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeFloat32(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0);var r=new ArrayBuffer(4);new DataView(r).setFloat32(0,e,!0);var t=new Uint8Array(r);this.push(t)}writeLenPrefixedText(e){if(expect(e,['String','Number','null','undefined']),null==e||null==e)return void this.writeUint8(0);'Number'==e.constructor.name&&(e=e.toString());const r=(new TextEncoder).encode(e);var t=r.byteLength;if(t>32767)return terminal.abnormal('text longer than 32767 bytes not supported'),void this.writeUint8(0);t<128?this.writeUint8(t):this.writeUint16BigEndian(t+32768),this.push(r)}writeUint16BigEndian(e){expect(e,['Number','null','undefined']),isNaN(e)&&(e=0),aver(e<65536),aver(e>=0);var r=new ArrayBuffer(2);new DataView(r).setUint16(0,e,!1);var t=new Uint8Array(r);this.push(t)}}