es.uint8-array.set-from-base64.js 1.3 KB

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  1. 'use strict';
  2. var $ = require('../internals/export');
  3. var globalThis = require('../internals/global-this');
  4. var $fromBase64 = require('../internals/uint8-from-base64');
  5. var anUint8Array = require('../internals/an-uint8-array');
  6. var Uint8Array = globalThis.Uint8Array;
  7. var INCORRECT_BEHAVIOR_OR_DOESNT_EXISTS = !Uint8Array || !Uint8Array.prototype.setFromBase64 || !function () {
  8. var target = new Uint8Array([255, 255, 255, 255, 255]);
  9. try {
  10. target.setFromBase64('', null);
  11. return;
  12. } catch (error) { /* empty */ }
  13. // Webkit not throw an error on odd length string
  14. try {
  15. target.setFromBase64('a');
  16. return;
  17. } catch (error) { /* empty */ }
  18. try {
  19. target.setFromBase64('MjYyZg===');
  20. } catch (error) {
  21. return target[0] === 50 && target[1] === 54 && target[2] === 50 && target[3] === 255 && target[4] === 255;
  22. }
  23. }();
  24. // `Uint8Array.prototype.setFromBase64` method
  25. // https://github.com/tc39/proposal-arraybuffer-base64
  26. if (Uint8Array) $({ target: 'Uint8Array', proto: true, forced: INCORRECT_BEHAVIOR_OR_DOESNT_EXISTS }, {
  27. setFromBase64: function setFromBase64(string /* , options */) {
  28. anUint8Array(this);
  29. var result = $fromBase64(string, arguments.length > 1 ? arguments[1] : undefined, this, this.length);
  30. return { read: result.read, written: result.written };
  31. }
  32. });