56 lines
1.6 KiB
Plaintext
56 lines
1.6 KiB
Plaintext
'use strict';
|
|
|
|
var forEach = require('for-each');
|
|
var availableTypedArrays = require('available-typed-arrays');
|
|
var callBound = require('call-bind/callBound');
|
|
var gOPD = require('gopd');
|
|
|
|
var $toString = callBound('Object.prototype.toString');
|
|
var hasToStringTag = require('has-tostringtag/shams')();
|
|
|
|
var g = typeof globalThis === 'undefined' ? global : globalThis;
|
|
var typedArrays = availableTypedArrays();
|
|
|
|
var $slice = callBound('String.prototype.slice');
|
|
var toStrTags = {};
|
|
var getPrototypeOf = Object.getPrototypeOf; // require('getprototypeof');
|
|
if (hasToStringTag && gOPD && getPrototypeOf) {
|
|
forEach(typedArrays, function (typedArray) {
|
|
if (typeof g[typedArray] === 'function') {
|
|
var arr = new g[typedArray]();
|
|
if (Symbol.toStringTag in arr) {
|
|
var proto = getPrototypeOf(arr);
|
|
var descriptor = gOPD(proto, Symbol.toStringTag);
|
|
if (!descriptor) {
|
|
var superProto = getPrototypeOf(proto);
|
|
descriptor = gOPD(superProto, Symbol.toStringTag);
|
|
}
|
|
toStrTags[typedArray] = descriptor.get;
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
var tryTypedArrays = function tryAllTypedArrays(value) {
|
|
var foundName = false;
|
|
forEach(toStrTags, function (getter, typedArray) {
|
|
if (!foundName) {
|
|
try {
|
|
var name = getter.call(value);
|
|
if (name === typedArray) {
|
|
foundName = name;
|
|
}
|
|
} catch (e) {}
|
|
}
|
|
});
|
|
return foundName;
|
|
};
|
|
|
|
var isTypedArray = require('is-typed-array');
|
|
|
|
module.exports = function whichTypedArray(value) {
|
|
if (!isTypedArray(value)) { return false; }
|
|
if (!hasToStringTag || !(Symbol.toStringTag in value)) { return $slice($toString(value), 8, -1); }
|
|
return tryTypedArrays(value);
|
|
};
|