'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('../helpers/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 } };