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42 lines
1.5 KiB
42 lines
1.5 KiB
'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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