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- 'use strict';
- var $RangeError = require('es-errors/range');
- var $TypeError = require('es-errors/type');
- var isTypedArray = require('is-typed-array');
- var typedArrayBuffer = require('typed-array-buffer');
- var typedArrayByteOffset = require('typed-array-byte-offset');
- var typedArrayLength = require('typed-array-length');
- var whichTypedArray = require('which-typed-array');
- var isInteger = require('math-intrinsics/isInteger');
- var Get = require('./Get');
- var IsBigIntElementType = require('./IsBigIntElementType');
- var IsDetachedBuffer = require('./IsDetachedBuffer');
- var LengthOfArrayLike = require('./LengthOfArrayLike');
- var SetValueInBuffer = require('./SetValueInBuffer');
- var ToBigInt = require('./ToBigInt');
- var ToNumber = require('./ToNumber');
- var ToObject = require('./ToObject');
- var ToString = require('./ToString');
- var tableTAO = require('./tables/typed-array-objects');
- // https://262.ecma-international.org/12.0/#sec-settypedarrayfromarraylike
- module.exports = function SetTypedArrayFromArrayLike(target, targetOffset, source) {
- var whichTarget = whichTypedArray(target);
- if (!whichTarget) {
- throw new $TypeError('Assertion failed: target must be a TypedArray instance');
- }
- 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 TypedArray instance'); // step 1
- }
- var targetBuffer = typedArrayBuffer(target); // step 2
- if (IsDetachedBuffer(targetBuffer)) {
- throw new $TypeError('target’s buffer is detached'); // step 3
- }
- var targetLength = typedArrayLength(target); // step 4
- var targetName = whichTarget; // step 5
- var targetType = tableTAO.name['$' + targetName]; // step 7
- var targetElementSize = tableTAO.size['$' + targetType]; // step 6
- var targetByteOffset = typedArrayByteOffset(target); // step 8
- var src = ToObject(source); // step 9
- var srcLength = LengthOfArrayLike(src); // step 10
- if (targetOffset === Infinity) {
- throw new $RangeError('targetOffset must be a finite integer'); // step 11
- }
- if (srcLength + targetOffset > targetLength) {
- throw new $RangeError('targetOffset + srcLength must be <= target.length'); // step 12
- }
- var targetByteIndex = (targetOffset * targetElementSize) + targetByteOffset; // step 13
- var k = 0; // step 14
- var limit = targetByteIndex + (targetElementSize * srcLength); // step 15
- while (targetByteIndex < limit) { // step 16
- var Pk = ToString(k); // step 16.a
- var value = Get(src, Pk); // step 16.b
- if (IsBigIntElementType(targetType)) {
- value = ToBigInt(value); // step 16.c
- } else {
- value = ToNumber(value); // step 16.d
- }
- if (IsDetachedBuffer(targetBuffer)) {
- throw new $TypeError('target’s buffer is detached'); // step 16.e
- }
- SetValueInBuffer(targetBuffer, targetByteIndex, targetType, value, true, 'Unordered'); // step 16.f
- k += 1; // step 16.g
- targetByteIndex += targetElementSize; // step 16.h
- }
- };
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