39 lines
883 B
Plaintext
39 lines
883 B
Plaintext
|
'use strict';
|
||
|
|
|
||
|
|
var $SyntaxError = require('es-errors/syntax');
|
||
|
|
var $TypeError = require('es-errors/type');
|
||
|
|
|
||
|
|
var isInteger = require('../helpers/isInteger');
|
||
|
|
|
||
|
|
var whichTypedArray = require('which-typed-array');
|
||
|
|
|
||
|
|
// https://262.ecma-international.org/13.0/#sec-typedarrayelementsize
|
||
|
|
|
||
|
|
var table71 = {
|
||
|
|
__proto__: null,
|
||
|
|
$Int8Array: 1,
|
||
|
|
$Uint8Array: 1,
|
||
|
|
$Uint8ClampedArray: 1,
|
||
|
|
$Int16Array: 2,
|
||
|
|
$Uint16Array: 2,
|
||
|
|
$Int32Array: 4,
|
||
|
|
$Uint32Array: 4,
|
||
|
|
$BigInt64Array: 8,
|
||
|
|
$BigUint64Array: 8,
|
||
|
|
$Float32Array: 4,
|
||
|
|
$Float64Array: 8
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = function TypedArrayElementSize(O) {
|
||
|
|
var type = whichTypedArray(O);
|
||
|
|
if (type === false) {
|
||
|
|
throw new $TypeError('Assertion failed: `O` must be a TypedArray');
|
||
|
|
}
|
||
|
|
var size = table71['$' + type];
|
||
|
|
if (!isInteger(size) || size < 0) {
|
||
|
|
throw new $SyntaxError('Assertion failed: Unknown TypedArray type `' + type + '`');
|
||
|
|
}
|
||
|
|
|
||
|
|
return size;
|
||
|
|
};
|