8000 Make microlib · qwtel/typed-array-utils@f1ba6cf · GitHub
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Make microlib
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‎.gitignore

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node_modules
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*.tgz
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/*.d.ts
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/*.js
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/*.js.map
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/*.d.ts.map
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cjs

‎LICENSE.md

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# The MIT License
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Copyright (c) 2020 Florian Klampfer <mail@qwtel.com> (https://qwtel.com/)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.

‎index.ts

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// Buffer Source Conversion
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// ------------------------
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export const bufferSourceToUint8Array = (bs: BufferSource) => bs instanceof ArrayBuffer
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? new Uint8Array(bs)
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: new Uint8Array(bs.buffer, bs.byteOffset, bs.byteLength);
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const bs2u8 = bufferSourceToUint8Array;
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export const bufferSourceToDataView = (bs: BufferSource) => bs instanceof ArrayBuffer
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? new DataView(bs)
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: new DataView(bs.buffer, bs.byteOffset, bs.byteLength);
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const bs2dv = bufferSourceToDataView;
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// Hex Functions
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// -------------
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export const byteToHex = (byte: number) => byte.toString(16).padStart(2, '0');
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export const hexToByte = (hexOctet: string) => parseInt(hexOctet, 16);
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export const hexStringToBytes = (hexString: string) => new Uint8Array(hexString.match(/[0-9a-f]{1,2}/ig).map(hexToByte));
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export const bytesToHexString = (bufferSource: BufferSource) => Array.from(bs2u8(bufferSource), byte => byteToHex(byte)).join('');
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export const bytesToHexArray = (bufferSource: BufferSource) => Array.from(bs2u8(bufferSource), byte => byteToHex(byte));
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// Concatenation
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// -------------
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export function concatUint8Arrays(...uint8Arrays: Uint8Array[]) {
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const size = uint8Arrays.reduce((size, u8) => size + u8.length, 0);
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const res = new Uint8Array(size);
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let i = 0;
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for (const u8 of uint8Arrays) {
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res.set(u8, i);
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i += u8.length;
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}
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return res;
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}
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export function concatBufferSources(...bufferSources: BufferSource[]) {
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return concatUint8Arrays(...bufferSources.map(bs2u8));
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}
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// Splitting
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// ---------
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export function splitUint8Array(uint8Array: Uint8Array, ...indices: number[]) {
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const result: Uint8Array[] = new Array(indices.length + 1);
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let prev = 0;
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let i = 0;
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for (const index of indices) {
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result[i++] = uint8Array.subarray(prev, index);
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prev = index;
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}
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result[i] = uint8Array.subarray(prev);
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return result;
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}
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export function splitBufferSource(bufferSource: BufferSource, ...indices: number[]) {
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return splitUint8Array(bs2u8(bufferSource), ...indices);
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}
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// Comparison
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// ----------
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export function compareUint8Arrays(u8_1: Uint8Array, ...u8s: Uint8Array[]) {
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if (u8s.some(u8_i => u8_1.byteLength !== u8_i.byteLength)) return false;
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let res = true;
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for (const u8_i of u8s) {
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for (let i = 0; i !== u8_1.length; i++) {
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const r = u8_1[i] === u8_i[i];
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res = r && res;
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}
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}
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return res;
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}
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function compareDataViewsUint32(dv_1: DataView, ...dvs: DataView[]) {
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if (dvs.some(dv_i => dv_1.byteLength !== dv_i.byteLength)) return false;
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let res = true;
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for (const dv_i of dvs) {
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for (let i = 0; i !== dv_1.byteLength; i += 4) {
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const r = dv_1.getUint32(i) === dv_i.getUint32(i);
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res = r && res;
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}
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}
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return res;
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}
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export function compareBufferSources(bufferSource: BufferSource, ...bufferSources: BufferSource[]) {
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return compareDataViewsUint32(bs2dv(bufferSource), ...bufferSources.map(bs2dv));
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}
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export function unsafeCompareUint8Arrays(u8_1: Uint8Array, ...u8s: Uint8Array[]) {
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if (u8s.some(u8_i => u8_1.byteLength !== u8_i.byteLength)) return false;
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return u8s.every(u8_i => {
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for (let i = 0; i !== u8_1.length; i++) if (u8_1[i] !== u8_i[i]) return false;
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return true;
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});
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}
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function unsafeCompareDataViewsUint32(dv_1: DataView, ...dvs: DataView[]) {
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if (dvs.some((dv_i) => dv_1.byteLength !== dv_i.byteLength)) return false;
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return dvs.every(dv_i => {
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for (let i = 0; i !== dv_i.byteLength; i += 4) {
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if (dv_1.getUint32(i) !== dv_i.getUint32(i)) {
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return false;
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}
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}
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return true;
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});
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}
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export function unsafeCompareBufferSources(bufferSource: BufferSource, ...bufferSources: BufferSource[]) {
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return unsafeCompareDataViewsUint32(bs2dv(bufferSource), ...bufferSources.map(bs2dv));
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}

‎package-lock.json

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‎package.json

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{
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"name": "typed-array-utils",
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"version": "0.0.0",
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"description": "",
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"type": "module",
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"main": "cjs/index.js",
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"module": "index.js",
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"files": [
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"index*",
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"cjs",
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"tsconfig*.json"
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],
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"exports": {
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".": {
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"import": "./index.js",
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"require": "./cjs/index.cjs"
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}
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},
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"types": "./index.d.ts",
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"scripts": {
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"clean": "rm -f *.d.ts *.js *.js.map *.d.ts.map",
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"test": "echo \"Error: no test specified\" && exit 0",
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"build": "npm run build:mjs & npm run build:cjs & wait",
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"build:mjs": "tsc -d -p tsconfig.json",
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"build:cjs": "tsc -d -p tsconfig.cjs.json && sed -i '' -E 's/\\.js/.cjs/g' cjs/*.js && for f in cjs/*.js; do mv \"$f\" \"${f%.js}.cjs\"; done",
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"prepack": "npm run clean && npm run build"
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},
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"author": "Florian Klampfer <mail@qwtel.com> (https://qwtel.com/)",
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"license": "MIT",
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"devDependencies": {
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"typescript": "^4.1.2"
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}
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}

‎tsconfig.cjs.json

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{
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"compilerOptions": {
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"lib": ["ES2020", "WebWorker"],
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"target": "ES2015",
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"module": "CommonJS",
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"outDir": "cjs",
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"declaration": true,
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"declarationMap": true,
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"sourceMap": true,
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"inlineSources": true,
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},
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"include": [
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"index.ts"
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],
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"exclude": [],
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}

‎tsconfig.json

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{
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"compilerOptions": {
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"lib": ["ES2020", "WebWorker"],
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"target": "ES2018",
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"outDir": ".",
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"declaration": true,
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"declarationMap": true,
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"sourceMap": true,
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"inlineSources": true,
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},
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"include": [
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"index.ts",
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],
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"exclude": [],
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}

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