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  1. 'use strict';
  2. var $RangeError = require('es-errors/range');
  3. var $TypeError = require('es-errors/type');
  4. var isInteger = require('math-intrinsics/isInteger');
  5. var isTypedArray = require('is-typed-array');
  6. var typedArrayBuffer = require('typed-array-buffer');
  7. var typedArrayByteOffset = require('typed-array-byte-offset');
  8. var typedArrayLength = require('typed-array-length');
  9. var whichTypedArray = require('which-typed-array');
  10. var Get = require('./Get');
  11. var IsBigIntElementType = require('./IsBigIntElementType');
  12. var IsDetachedBuffer = require('./IsDetachedBuffer');
  13. var LengthOfArrayLike = require('./LengthOfArrayLike');
  14. var SetValueInBuffer = require('./SetValueInBuffer');
  15. var ToBigInt = require('./ToBigInt');
  16. var ToNumber = require('./ToNumber');
  17. var ToObject = require('./ToObject');
  18. var ToString = require('./ToString');
  19. var TypedArrayElementSize = require('./TypedArrayElementSize');
  20. var TypedArrayElementType = require('./TypedArrayElementType');
  21. // https://262.ecma-international.org/13.0/#sec-settypedarrayfromarraylike
  22. module.exports = function SetTypedArrayFromArrayLike(target, targetOffset, source) {
  23. var whichTarget = whichTypedArray(target);
  24. if (!whichTarget) {
  25. throw new $TypeError('Assertion failed: target must be a TypedArray instance');
  26. }
  27. if (targetOffset !== Infinity && (!isInteger(targetOffset) || targetOffset < 0)) {
  28. throw new $TypeError('Assertion failed: targetOffset must be a non-negative integer or +Infinity');
  29. }
  30. if (isTypedArray(source)) {
  31. throw new $TypeError('Assertion failed: source must not be a TypedArray instance');
  32. }
  33. var targetBuffer = typedArrayBuffer(target); // step 1
  34. if (IsDetachedBuffer(targetBuffer)) {
  35. throw new $TypeError('target’s buffer is detached'); // step 2
  36. }
  37. var targetLength = typedArrayLength(target); // step 3
  38. var targetElementSize = TypedArrayElementSize(target); // step 4
  39. var targetType = TypedArrayElementType(target); // step 5
  40. var targetByteOffset = typedArrayByteOffset(target); // step 6
  41. var src = ToObject(source); // step 7
  42. var srcLength = LengthOfArrayLike(src); // step 8
  43. if (targetOffset === Infinity) {
  44. throw new $RangeError('targetOffset must be a finite integer'); // step 9
  45. }
  46. if (srcLength + targetOffset > targetLength) {
  47. throw new $RangeError('targetOffset + srcLength must be <= target.length'); // step 10
  48. }
  49. var targetByteIndex = (targetOffset * targetElementSize) + targetByteOffset; // step 11
  50. var k = 0; // step 12
  51. var limit = targetByteIndex + (targetElementSize * srcLength); // step 13
  52. while (targetByteIndex < limit) { // step 14
  53. var Pk = ToString(k); // step 14.a
  54. var value = Get(src, Pk); // step 14.b
  55. if (IsBigIntElementType(targetType)) {
  56. value = ToBigInt(value); // step 14.c
  57. } else {
  58. value = ToNumber(value); // step 14.d
  59. }
  60. if (IsDetachedBuffer(targetBuffer)) {
  61. throw new $TypeError('target’s buffer is detached'); // step 14.e
  62. }
  63. SetValueInBuffer(targetBuffer, targetByteIndex, targetType, value, true, 'Unordered'); // step 14.f
  64. k += 1; // step 14.g
  65. targetByteIndex += targetElementSize; // step 14.h
  66. }
  67. };