[e29cc2e] | 1 | /*
|
---|
| 2 | * base64-arraybuffer 1.0.1 <https://github.com/niklasvh/base64-arraybuffer>
|
---|
| 3 | * Copyright (c) 2021 Niklas von Hertzen <https://hertzen.com>
|
---|
| 4 | * Released under MIT License
|
---|
| 5 | */
|
---|
| 6 | var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
|
---|
| 7 | // Use a lookup table to find the index.
|
---|
| 8 | var lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
|
---|
| 9 | for (var i = 0; i < chars.length; i++) {
|
---|
| 10 | lookup[chars.charCodeAt(i)] = i;
|
---|
| 11 | }
|
---|
| 12 | var encode = function (arraybuffer) {
|
---|
| 13 | var bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';
|
---|
| 14 | for (i = 0; i < len; i += 3) {
|
---|
| 15 | base64 += chars[bytes[i] >> 2];
|
---|
| 16 | base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
|
---|
| 17 | base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
|
---|
| 18 | base64 += chars[bytes[i + 2] & 63];
|
---|
| 19 | }
|
---|
| 20 | if (len % 3 === 2) {
|
---|
| 21 | base64 = base64.substring(0, base64.length - 1) + '=';
|
---|
| 22 | }
|
---|
| 23 | else if (len % 3 === 1) {
|
---|
| 24 | base64 = base64.substring(0, base64.length - 2) + '==';
|
---|
| 25 | }
|
---|
| 26 | return base64;
|
---|
| 27 | };
|
---|
| 28 | var decode = function (base64) {
|
---|
| 29 | var bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
|
---|
| 30 | if (base64[base64.length - 1] === '=') {
|
---|
| 31 | bufferLength--;
|
---|
| 32 | if (base64[base64.length - 2] === '=') {
|
---|
| 33 | bufferLength--;
|
---|
| 34 | }
|
---|
| 35 | }
|
---|
| 36 | var arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);
|
---|
| 37 | for (i = 0; i < len; i += 4) {
|
---|
| 38 | encoded1 = lookup[base64.charCodeAt(i)];
|
---|
| 39 | encoded2 = lookup[base64.charCodeAt(i + 1)];
|
---|
| 40 | encoded3 = lookup[base64.charCodeAt(i + 2)];
|
---|
| 41 | encoded4 = lookup[base64.charCodeAt(i + 3)];
|
---|
| 42 | bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
|
---|
| 43 | bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
|
---|
| 44 | bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
|
---|
| 45 | }
|
---|
| 46 | return arraybuffer;
|
---|
| 47 | };
|
---|
| 48 |
|
---|
| 49 | export { decode, encode };
|
---|
| 50 | //# sourceMappingURL=base64-arraybuffer.es5.js.map
|
---|