43 lines
1.5 KiB
JavaScript
43 lines
1.5 KiB
JavaScript
'use strict';
|
|
|
|
var $TypeError = require('es-errors/type');
|
|
|
|
var IsValidIntegerIndex = require('./IsValidIntegerIndex');
|
|
var SetValueInBuffer = require('./SetValueInBuffer');
|
|
var ToBigInt = require('./ToBigInt');
|
|
var ToNumber = require('./ToNumber');
|
|
var TypedArrayElementSize = require('./TypedArrayElementSize');
|
|
var TypedArrayElementType = require('./TypedArrayElementType');
|
|
|
|
var typedArrayBuffer = require('typed-array-buffer');
|
|
var typedArrayByteOffset = require('typed-array-byte-offset');
|
|
var whichTypedArray = require('which-typed-array');
|
|
|
|
// http://www.ecma-international.org/ecma-262/15.0/#sec-typedarraysetelement
|
|
|
|
module.exports = function TypedArraySetElement(O, index, value) {
|
|
var which = whichTypedArray(O);
|
|
if (!which) {
|
|
throw new $TypeError('Assertion failed: `O` must be a Typed Array');
|
|
}
|
|
if (typeof index !== 'number') {
|
|
throw new $TypeError('Assertion failed: `index` must be a Number');
|
|
}
|
|
|
|
var contentType = which === 'BigInt64Array' || which === 'BigUint64Array' ? 'BIGINT' : 'NUMBER';
|
|
|
|
var numValue = contentType === 'BIGINT' ? ToBigInt(value) : ToNumber(value); // steps 1 - 2
|
|
|
|
if (IsValidIntegerIndex(O, index)) { // step 3
|
|
var offset = typedArrayByteOffset(O); // step 3.a
|
|
|
|
var elementSize = TypedArrayElementSize(O); // step 3.b
|
|
|
|
var byteIndexInBuffer = (index * elementSize) + offset; // step 3.c
|
|
|
|
var elementType = TypedArrayElementType(O); // step 3.d
|
|
|
|
SetValueInBuffer(typedArrayBuffer(O), byteIndexInBuffer, elementType, numValue, true, 'UNORDERED'); // step 3.e
|
|
}
|
|
};
|