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Copyright 2013 Lovell Fuller and others.
SPDX-License-Identifier: Apache-2.0
*/
/**
* Is this value defined and not null?
* @private
*/
const defined = (val) => typeof val !== 'undefined' && val !== null;
/**
* Is this value an object?
* @private
*/
const object = (val) => typeof val === 'object';
/**
* Is this value a plain object?
* @private
*/
const plainObject = (val) => Object.prototype.toString.call(val) === '[object Object]';
/**
* Is this value a function?
* @private
*/
const fn = (val) => typeof val === 'function';
/**
* Is this value a boolean?
* @private
*/
const bool = (val) => typeof val === 'boolean';
/**
* Is this value a Buffer object?
* @private
*/
const buffer = (val) => val instanceof Buffer;
/**
* Is this value a typed array object?. E.g. Uint8Array or Uint8ClampedArray?
* @private
*/
const typedArray = (val) => {
if (defined(val)) {
switch (val.constructor) {
case Uint8Array:
case Uint8ClampedArray:
case Int8Array:
case Uint16Array:
case Int16Array:
case Uint32Array:
case Int32Array:
case Float32Array:
case Float64Array:
return true;
}
}
return false;
};
/**
* Is this value an ArrayBuffer object?
* @private
*/
const arrayBuffer = (val) => val instanceof ArrayBuffer;
/**
* Is this value a non-empty string?
* @private
*/
const string = (val) => typeof val === 'string' && val.length > 0;
/**
* Is this value a real number?
* @private
*/
const number = (val) => typeof val === 'number' && !Number.isNaN(val);
/**
* Is this value an integer?
* @private
*/
const integer = (val) => Number.isInteger(val);
/**
* Is this value within an inclusive given range?
* @private
*/
const inRange = (val, min, max) => val >= min && val <= max;
/**
* Is this value within the elements of an array?
* @private
*/
const inArray = (val, list) => list.includes(val);
/**
* Create an Error with a message relating to an invalid parameter.
*
* @param {string} name - parameter name.
* @param {string} expected - description of the type/value/range expected.
* @param {*} actual - the value received.
* @returns {Error} Containing the formatted message.
* @private
*/
const invalidParameterError = (name, expected, actual) => new Error(
`Expected ${expected} for ${name} but received ${actual} of type ${typeof actual}`
);
/**
* Ensures an Error from C++ contains a JS stack.
*
* @param {Error} native - Error with message from C++.
* @param {Error} context - Error with stack from JS.
* @returns {Error} Error with message and stack.
* @private
*/
const nativeError = (native, context) => {
context.message = native.message;
return context;
};
module.exports = {
defined,
object,
plainObject,
fn,
bool,
buffer,
typedArray,
arrayBuffer,
string,
number,
integer,
inRange,
inArray,
invalidParameterError,
nativeError
};
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