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43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
'use strict';
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var $TypeError = require('es-errors/type');
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var IsValidIntegerIndex = require('./IsValidIntegerIndex');
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var SetValueInBuffer = require('./SetValueInBuffer');
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var ToBigInt = require('./ToBigInt');
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var ToNumber = require('./ToNumber');
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var TypedArrayElementSize = require('./TypedArrayElementSize');
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var TypedArrayElementType = require('./TypedArrayElementType');
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var typedArrayBuffer = require('typed-array-buffer');
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var typedArrayByteOffset = require('typed-array-byte-offset');
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var whichTypedArray = require('which-typed-array');
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// https://262.ecma-international.org/13.0/#sec-integerindexedelementset
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module.exports = function IntegerIndexedElementSet(O, index, value) {
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var arrayTypeName = whichTypedArray(O);
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if (!arrayTypeName) {
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throw new $TypeError('Assertion failed: `O` must be a TypedArray');
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}
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if (typeof index !== 'number') {
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throw new $TypeError('Assertion failed: `index` must be a Number');
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}
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var contentType = arrayTypeName === 'BigInt64Array' || arrayTypeName === 'BigUint64Array' ? 'BigInt' : 'Number';
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var numValue = contentType === 'BigInt' ? ToBigInt(value) : ToNumber(value); // steps 1 - 2
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if (IsValidIntegerIndex(O, index)) { // step 3
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var offset = typedArrayByteOffset(O); // step 3.a
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var elementSize = TypedArrayElementSize(O); // step 3.b
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var indexedPosition = (index * elementSize) + offset; // step 3.c
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var elementType = TypedArrayElementType(O); // step 3.d
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SetValueInBuffer(typedArrayBuffer(O), indexedPosition, elementType, numValue, true, 'Unordered'); // step 3.e
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}
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};
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