source: imaps-frontend/node_modules/typed-array-byte-offset/index.js

'use strict';

var forEach = require('for-each');
var callBind = require('call-bind');

var typedArrays = require('available-typed-arrays')();

/** @typedef {Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array | BigInt64Array | BigUint64Array} TypedArray */
/** @typedef {(x: TypedArray) => number} ByteOffsetGetter */

/** @type {Object.<typeof typedArrays, ByteOffsetGetter>} */
var getters = {};
var hasProto = require('has-proto')();

var gOPD = require('gopd');
var oDP = Object.defineProperty;
if (gOPD) {
        /** @type {ByteOffsetGetter} */
        var getByteOffset = function (x) {
                return x.byteOffset;
        };
        forEach(typedArrays, function (typedArray) {
                // In Safari 7, Typed Array constructors are typeof object
                if (typeof global[typedArray] === 'function' || typeof global[typedArray] === 'object') {
                        var Proto = global[typedArray].prototype;
                        // @ts-expect-error TS can't guarantee the callback is invoked sync
                        var descriptor = gOPD(Proto, 'byteOffset');
                        if (!descriptor && hasProto) {
                                // @ts-expect-error hush, TS, every object has a dunder proto
                                var superProto = Proto.__proto__; // eslint-disable-line no-proto
                                // @ts-expect-error TS can't guarantee the callback is invoked sync
                                descriptor = gOPD(superProto, 'byteOffset');
                        }
                        // Opera 12.16 has a magic byteOffset data property on instances AND on Proto
                        if (descriptor && descriptor.get) {
                                getters[typedArray] = callBind(descriptor.get);
                        } else if (oDP) {
                                // this is likely an engine where instances have a magic byteOffset data property
                                var arr = new global[typedArray](2);
                                // @ts-expect-error TS can't guarantee the callback is invoked sync
                                descriptor = gOPD(arr, 'byteOffset');
                                if (descriptor && descriptor.configurable) {
                                        oDP(arr, 'length', { value: 3 });
                                }
                                if (arr.length === 2) {
                                        getters[typedArray] = getByteOffset;
                                }
                        }
                }
        });
}

/** @type {ByteOffsetGetter} */
var tryTypedArrays = function tryAllTypedArrays(value) {
        /** @type {number} */ var foundOffset;
        forEach(getters, /** @type {(getter: ByteOffsetGetter) => void} */ function (getter) {
                if (typeof foundOffset !== 'number') {
                        try {
                                var offset = getter(value);
                                if (typeof offset === 'number') {
                                        foundOffset = offset;
                                }
                        } catch (e) {}
                }
        });
        // @ts-expect-error TS can't guarantee the callback is invoked sync
        return foundOffset;
};

var isTypedArray = require('is-typed-array');

/** @type {import('.')} */
module.exports = function typedArrayByteOffset(value) {
        if (!isTypedArray(value)) {
                return false;
        }
        return tryTypedArrays(value);
};