source: imaps-frontend/node_modules/set-function-length/index.js@ 0c6b92a

'use strict';

var GetIntrinsic = require('get-intrinsic');
var define = require('define-data-property');
var hasDescriptors = require('has-property-descriptors')();
var gOPD = require('gopd');

var $TypeError = require('es-errors/type');
var $floor = GetIntrinsic('%Math.floor%');

/** @type {import('.')} */
module.exports = function setFunctionLength(fn, length) {
        if (typeof fn !== 'function') {
                throw new $TypeError('`fn` is not a function');
        }
        if (typeof length !== 'number' || length < 0 || length > 0xFFFFFFFF || $floor(length) !== length) {
                throw new $TypeError('`length` must be a positive 32-bit integer');
        }

        var loose = arguments.length > 2 && !!arguments[2];

        var functionLengthIsConfigurable = true;
        var functionLengthIsWritable = true;
        if ('length' in fn && gOPD) {
                var desc = gOPD(fn, 'length');
                if (desc && !desc.configurable) {
                        functionLengthIsConfigurable = false;
                }
                if (desc && !desc.writable) {
                        functionLengthIsWritable = false;
                }
        }

        if (functionLengthIsConfigurable || functionLengthIsWritable || !loose) {
                if (hasDescriptors) {
                        define(/** @type {Parameters<define>[0]} */ (fn), 'length', length, true, true);
                } else {
                        define(/** @type {Parameters<define>[0]} */ (fn), 'length', length);
                }
        }
        return fn;
};