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  1. 'use strict';
  2. var global = require('../internals/global');
  3. var call = require('../internals/function-call');
  4. var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
  5. var lengthOfArrayLike = require('../internals/length-of-array-like');
  6. var toOffset = require('../internals/to-offset');
  7. var toIndexedObject = require('../internals/to-object');
  8. var fails = require('../internals/fails');
  9. var RangeError = global.RangeError;
  10. var Int8Array = global.Int8Array;
  11. var Int8ArrayPrototype = Int8Array && Int8Array.prototype;
  12. var $set = Int8ArrayPrototype && Int8ArrayPrototype.set;
  13. var aTypedArray = ArrayBufferViewCore.aTypedArray;
  14. var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
  15. var WORKS_WITH_OBJECTS_AND_GENERIC_ON_TYPED_ARRAYS = !fails(function () {
  16. // eslint-disable-next-line es/no-typed-arrays -- required for testing
  17. var array = new Uint8ClampedArray(2);
  18. call($set, array, { length: 1, 0: 3 }, 1);
  19. return array[1] !== 3;
  20. });
  21. // https://bugs.chromium.org/p/v8/issues/detail?id=11294 and other
  22. var TO_OBJECT_BUG = WORKS_WITH_OBJECTS_AND_GENERIC_ON_TYPED_ARRAYS && ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS && fails(function () {
  23. var array = new Int8Array(2);
  24. array.set(1);
  25. array.set('2', 1);
  26. return array[0] !== 0 || array[1] !== 2;
  27. });
  28. // `%TypedArray%.prototype.set` method
  29. // https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
  30. exportTypedArrayMethod('set', function set(arrayLike /* , offset */) {
  31. aTypedArray(this);
  32. var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
  33. var src = toIndexedObject(arrayLike);
  34. if (WORKS_WITH_OBJECTS_AND_GENERIC_ON_TYPED_ARRAYS) return call($set, this, src, offset);
  35. var length = this.length;
  36. var len = lengthOfArrayLike(src);
  37. var index = 0;
  38. if (len + offset > length) throw new RangeError('Wrong length');
  39. while (index < len) this[offset + index] = src[index++];
  40. }, !WORKS_WITH_OBJECTS_AND_GENERIC_ON_TYPED_ARRAYS || TO_OBJECT_BUG);