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  1. 'use strict';
  2. var $TypeError = require('es-errors/type');
  3. var IsArray = require('./IsArray');
  4. var isByteValue = require('../helpers/isByteValue');
  5. // https://262.ecma-international.org/12.0/#sec-bytelistequal
  6. module.exports = function ByteListEqual(xBytes, yBytes) {
  7. if (!IsArray(xBytes) || !IsArray(yBytes)) {
  8. throw new $TypeError('Assertion failed: `xBytes` and `yBytes` must be sequences of byte values (an integer 0-255, inclusive)');
  9. }
  10. if (xBytes.length !== yBytes.length) {
  11. return false;
  12. }
  13. for (var i = 0; i < xBytes.length; i += 1) {
  14. var xByte = xBytes[i];
  15. var yByte = yBytes[i];
  16. if (!isByteValue(xByte) || !isByteValue(yByte)) {
  17. throw new $TypeError('Assertion failed: `xBytes` and `yBytes` must be sequences of byte values (an integer 0-255, inclusive)');
  18. }
  19. if (xByte !== yByte) {
  20. return false;
  21. }
  22. }
  23. return true;
  24. };