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- 'use strict';
- var $RangeError = require('es-errors/range');
- var $TypeError = require('es-errors/type');
- var isInteger = require('math-intrinsics/isInteger');
- var isTypedArray = require('is-typed-array');
- var whichTypedArray = require('which-typed-array');
- var Get = require('./Get');
- var IsTypedArrayOutOfBounds = require('./IsTypedArrayOutOfBounds');
- var LengthOfArrayLike = require('./LengthOfArrayLike');
- var MakeTypedArrayWithBufferWitnessRecord = require('./MakeTypedArrayWithBufferWitnessRecord');
- var ToObject = require('./ToObject');
- var ToString = require('./ToString');
- var TypedArrayLength = require('./TypedArrayLength');
- var TypedArraySetElement = require('./TypedArraySetElement');
- // https://262.ecma-international.org/15.0/#sec-settypedarrayfromarraylike
- module.exports = function SetTypedArrayFromArrayLike(target, targetOffset, source) {
- var whichTarget = whichTypedArray(target);
- if (!whichTarget) {
- throw new $TypeError('Assertion failed: `target` must be a Typed Array');
- }
- if (targetOffset !== Infinity && (!isInteger(targetOffset) || targetOffset < 0)) {
- throw new $TypeError('Assertion failed: `targetOffset` must be a non-negative integer or +Infinity');
- }
- if (isTypedArray(source)) {
- throw new $TypeError('Assertion failed: `source` must not be a Typed Array');
- }
- var targetRecord = MakeTypedArrayWithBufferWitnessRecord(target, 'SEQ-CST'); // step 1
- if (IsTypedArrayOutOfBounds(targetRecord)) {
- throw new $TypeError('target is out of bounds'); // step 2
- }
- var targetLength = TypedArrayLength(targetRecord); // step 3
- var src = ToObject(source); // step 4
- var srcLength = LengthOfArrayLike(src); // step 5
- if (targetOffset === Infinity) {
- throw new $RangeError('targetOffset must be a finite integer'); // step 6
- }
- if (srcLength + targetOffset > targetLength) {
- throw new $RangeError('targetOffset + srcLength must be <= target.length'); // step 7
- }
- var k = 0; // step 8
- while (k < srcLength) { // step 9
- var Pk = ToString(k); // step 9.a
- var value = Get(src, Pk); // step 9.b
- var targetIndex = targetOffset + k; // step 9.c
- TypedArraySetElement(target, targetIndex, value); // step 9.d
- k += 1; // step 9.e
- }
- };
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