49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
import { converse } from '@converse/headless/core.js';
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const { u } = converse.env;
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export function appendArrayBuffer (buffer1, buffer2) {
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const tmp = new Uint8Array(buffer1.byteLength + buffer2.byteLength);
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tmp.set(new Uint8Array(buffer1), 0);
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tmp.set(new Uint8Array(buffer2), buffer1.byteLength);
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return tmp.buffer;
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}
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export function arrayBufferToHex (ab) {
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// https://stackoverflow.com/questions/40031688/javascript-arraybuffer-to-hex#40031979
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return Array.prototype.map.call(new Uint8Array(ab), x => ('00' + x.toString(16)).slice(-2)).join('');
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}
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export function arrayBufferToString (ab) {
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return new TextDecoder("utf-8").decode(ab);
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}
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export function stringToArrayBuffer (string) {
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const bytes = new TextEncoder("utf-8").encode(string);
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return bytes.buffer;
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}
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export function arrayBufferToBase64 (ab) {
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return btoa((new Uint8Array(ab)).reduce((data, byte) => data + String.fromCharCode(byte), ''));
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}
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export function base64ToArrayBuffer (b64) {
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const binary_string = window.atob(b64),
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len = binary_string.length,
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bytes = new Uint8Array(len);
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for (let i = 0; i < len; i++) {
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bytes[i] = binary_string.charCodeAt(i)
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}
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return bytes.buffer
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}
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export function hexToArrayBuffer (hex) {
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const typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(h => parseInt(h, 16)))
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return typedArray.buffer
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}
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Object.assign(u, { arrayBufferToHex, arrayBufferToString, stringToArrayBuffer, arrayBufferToBase64, base64ToArrayBuffer });
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