v10.4.3

Remove toStringTag declaration for type compatibility

.npmignore

@@ -1,2 +1,3 @@
 test
-excluded
+excluded
+.*

.travis.yml

@@ -1,6 +1,17 @@
 language: node_js
 node_js:
   - "node"
+  - "18"
+  - "17"
+  - "16"
+  - "15"
+  - "14"
+  - "13"
+  - "12"
+  - "11"
+  - "10"
+  - "9"
+  - "8"
   - "7"
   - "6"
   - "5"
@@ -9,5 +20,4 @@ node_js:
   - "0.11"
   - "0.10"
   - "0.8"
-  - "0.6"
   - "iojs"

CHANGELOG.md

@@ -1,3 +1,139 @@
+#### 10.4.3
+* 04/12/2022
+* #211 Remove `toStringTag` declaration for type compatibility.
+
+#### 10.4.2
+* 12/10/2022
+* #209 Correct return type.
+
+#### 10.4.1
+* 16/09/2022
+* #205 Add './decimal' subpath to *package.json* `exports`.
+
+#### 10.4.0
+* 14/08/2022
+* #201 Add `exports` field to *package.json*.
+* #203 Preserve license comment after bundling.
+* #198 Use type predicate on `isDecimal`.
+
+#### 10.3.1
+* 25/06/2021
+* Remove minified versions. Refresh *README*.
+
+#### 10.3.0
+* 22/06/2021
+* Support underscores as separators.
+* #101 Add `Decimal.clamp` method.
+* #161 Fix Decimal instances deemed plain objects.
+* #100 Add `Decimal.sum` method.
+* #146 `Symbol.for` to `Symbol['for']` for IE8.
+* #132 Fix possible infinite loop when `minE` is very low.
+* #180 Accept Decimals of different origin.
+* Update Typescript definitions.
+* Update minification examples in *README*.
+* Add minified versions for both *decimal.js* and *decimal.mjs*.
+* Add *files* field to *package.json*, and remove build script.
+
+#### 10.2.1
+* 28/09/2020
+* Correct `sqrt` initial estimate.
+
+#### 10.2.0
+* 08/05/2019
+* #128 Workaround V8 `Math.pow` change.
+* #93 Accept `+` prefix when parsing string values.
+* #129 Fix typo.
+
+#### 10.1.1
+* 27/02/2019
+* Check `Symbol` properly.
+
+#### 10.1.0
+* 26/02/2019
+* #122 Add custom `util.inspect()` function.
+* Add `Symbol.toStringTag`.
+* #121 Constructor: add range check for arguments of type number and Decimal.
+* Remove premable from uglifyjs build script.
+* Move *decimal.min.js.map* to root directory.
+
+#### 10.0.2
+* 13/12/2018
+* #114 Remove soureMappingURL from *decimal.min.js*.
+* Remove *bower.json*.
+
+#### 10.0.1
+* 24/05/2018
+* Add `browser` field to *package.json*.
+
+#### 10.0.0
+* 10/03/2018
+* #88 `toNearest` to return the nearest multiple in the direction of the rounding mode.
+* #82 #91 `const` to `var`.
+* Add trigonometric precision limit explanantion to documentation.
+* Put global ts definitions in separate file (see *bignumber.js* #143).
+
+#### 9.0.1
+* 15/12/2017
+* #80 Typings: correct return type.
+
+#### 9.0.0
+* 14/12/2017
+* #78 Typings: remove `toFormat`.
+
+#### 8.0.0
+* 10/12/2017
+* Correct typings: `toFraction` returns `Decimal[]`.
+* Type-checking: add `Decimal.isDecimal` method.
+* Enable configuration reset with `defaults: true`.
+* Add named export, Decimal, to *decimal.mjs*.
+
+#### 7.5.1
+* 03/12/2017
+* Remove typo.
+
+#### 7.5.0
+* 03/12/2017
+* Use TypeScript declarations outside modules.
+
+#### 7.4.0
+* 25/11/2017
+* Add TypeScript typings.
+
+#### 7.3.0
+* 26/09/2017
+* Rename *decimal.es6.js* to *decimal.mjs*.
+* Amend  *.travis.yml*.
+
+#### 7.2.4
+* 09/09/2017
+* Update docs regarding `global.crypto`.
+* Fix `import` issues.
+
+#### 7.2.3
+* 27/06/2017
+* Bugfix: #58 `pow` sometimes throws when result is `Infinity`.
+
+#### 7.2.2
+* 25/06/2017
+* Bugfix: #57 Powers of -1 for integers over `Number.MAX_SAFE_INTEGER`.
+
+#### 7.2.1
+* 04/05/2017
+* Fix *README* badges.
+
+#### 7.2.0
+* 09/04/2017
+* Add *decimal.es6.js*
+
+#### 7.1.2
+* 05/04/2017
+* `Decimal.default` to `Decimal['default']` IE8 issue
+
+#### 7.1.1
+* 10/01/2017
+* Remove duplicated for-loop
+* Minor refactoring
+
 #### 7.1.0
 * 09/11/2016
 * Support ES6 imports.

LICENCE.md

@@ -1,6 +1,6 @@
 The MIT Licence.
 
-Copyright (c) 2016 Michael Mclaughlin
+Copyright (c) 2022 Michael Mclaughlin
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

README.md

@@ -2,8 +2,11 @@
 
 An arbitrary-precision Decimal type for JavaScript.
 
-<br>
+[![npm version](https://img.shields.io/npm/v/decimal.js.svg)](https://www.npmjs.com/package/decimal.js)
+[![npm downloads](https://img.shields.io/npm/dw/decimal.js)](https://www.npmjs.com/package/decimal.js)
 [![Build Status](https://travis-ci.org/MikeMcl/decimal.js.svg)](https://travis-ci.org/MikeMcl/decimal.js)
+[![CDNJS](https://img.shields.io/cdnjs/v/decimal.js.svg)](https://cdnjs.com/libraries/decimal.js)
+
 <br>
 
 ## Features
@@ -15,7 +18,9 @@ An arbitrary-precision Decimal type for JavaScript.
   - Faster, smaller, and perhaps easier to use than JavaScript versions of Java's BigDecimal
   - No dependencies
   - Wide platform compatibility: uses JavaScript 1.5 (ECMAScript 3) features only
-  - Comprehensive [documentation](http://mikemcl.github.io/decimal.js/) and test set
+  - Comprehensive [documentation](https://mikemcl.github.io/decimal.js/) and test set
+  - Used under the hood by [math.js](https://github.com/josdejong/mathjs)
+  - Includes a TypeScript declaration file: *decimal.d.ts*
 
 ![API](https://raw.githubusercontent.com/MikeMcl/decimal.js/gh-pages/API.png)
 
@@ -28,47 +33,43 @@ This library also adds the trigonometric functions, among others, and supports n
 which makes it a significantly larger library than *bignumber.js* and the even smaller
 [big.js](https://github.com/MikeMcl/big.js/).
 
-For a lighter version of this library without the trigonometric functions see the
-[v4.x.x](https://github.com/MikeMcl/decimal.js/tree/v4.x.x) branch where version 4 continues to be supported, or better, see [decimal.js-light](https://github.com/MikeMcl/decimal.js-light/), which is lighter still.
+For a lighter version of this library without the trigonometric functions see
+[decimal.js-light](https://github.com/MikeMcl/decimal.js-light/).
 
 ## Load
 
-The library is the single JavaScript file *decimal.js* (or minified, *decimal.min.js*).
+The library is the single JavaScript file *decimal.js* or ES module *decimal.mjs*.
 
-It can be loaded using a script tag in an HTML document for the browser
+Browser:
 
 ```html
 <script src='path/to/decimal.js'></script>
+
+<script type="module">
+  import Decimal from './path/to/decimal.mjs';
+  ...
+</script>
 ```
 
-or as a [Node.js](http://nodejs.org) module using `require`.
-
-```js
-var Decimal = require('decimal.js');
-```
-
-For Node, the library is available from the [npm](https://npmjs.org/) registry
+[Node.js](https://nodejs.org):
 
 ```bash
-$ npm install decimal.js
+npm install decimal.js
 ```
-
-To load with AMD loader libraries such as [requireJS](http://requirejs.org/):
-
 ```js
-require(['decimal'], function(Decimal) {
-    // Use Decimal here in local scope. No global Decimal.
-});
+const Decimal = require('decimal.js');
+
+import Decimal from 'decimal.js';
+
+import {Decimal} from 'decimal.js';
 ```
 
 ## Use
 
-*In all examples below, `var`, semicolons and `toString` calls are not shown.
+*In all examples below, semicolons and `toString` calls are not shown.
 If a commented-out value is in quotes it means `toString` has been called on the preceding expression.*
 
-The library exports a single function object, `Decimal`, the constructor of Decimal instances.
-
-It accepts a value of type number, string or Decimal.
+The library exports a single constructor function, `Decimal`, which expects a single argument that is a number, string or Decimal instance.
 
 ```js
 x = new Decimal(123.4567)
@@ -77,7 +78,29 @@ z = new Decimal(x)
 x.equals(y) && y.equals(z) && x.equals(z)        // true
 ```
 
-A value can also be in binary, hexadecimal or octal if the appropriate prefix is included.
+If using values with more than a few digits, it is recommended to pass strings rather than numbers to avoid a potential loss of precision.
+
+```js
+// Precision loss from using numeric literals with more than 15 significant digits.
+new Decimal(1.0000000000000001)         // '1'
+new Decimal(88259496234518.57)          // '88259496234518.56'
+new Decimal(99999999999999999999)       // '100000000000000000000'
+
+// Precision loss from using numeric literals outside the range of Number values.
+new Decimal(2e+308)                     // 'Infinity'
+new Decimal(1e-324)                     // '0'
+
+// Precision loss from the unexpected result of arithmetic with Number values.
+new Decimal(0.7 + 0.1)                  // '0.7999999999999999'
+```
+
+As with JavaScript numbers, strings can contain underscores as separators to improve readability.
+
+```js
+x = new Decimal('2_147_483_647')
+```
+
+String values in binary, hexadecimal or octal notation are also accepted if the appropriate prefix is included.
 
 ```js
 x = new Decimal('0xff.f')            // '255.9375'
@@ -86,9 +109,13 @@ z = x.plus(y)                        // '427.9375'
 
 z.toBinary()                         // '0b110101011.1111'
 z.toBinary(13)                       // '0b1.101010111111p+8'
+
+// Using binary exponential notation to create a Decimal with the value of `Number.MAX_VALUE`.
+x = new Decimal('0b1.1111111111111111111111111111111111111111111111111111p+1023')
+// '1.7976931348623157081e+308'
 ```
 
-A Decimal is immutable in the sense that it is not changed by its methods.
+Decimal instances are immutable in the sense that they are not changed by their methods.
 
 ```js
 0.3 - 0.1                     // 0.19999999999999998
@@ -107,27 +134,28 @@ x.times('1.23456780123456789e+9').plus(9876.5432321).dividedBy('4444562598.11177
 Many method names have a shorter alias.
 
 ```js
-x.squareRoot().dividedBy(y).toPower(3).equals(x.sqrt().div(y).pow(3))         // true
-x.cmp(y.mod(z).neg()) == 1 && x.comparedTo(y.modulo(z).negated()) == 1        // true
+x.squareRoot().dividedBy(y).toPower(3).equals(x.sqrt().div(y).pow(3))     // true
+x.comparedTo(y.modulo(z).negated() === x.cmp(y.mod(z).neg())              // true
 ```
 
-Like JavaScript's Number type, there are `toExponential`, `toFixed` and `toPrecision` methods,
+Most of the methods of JavaScript's `Number.prototype` and `Math` objects are replicated.
 
 ```js
 x = new Decimal(255.5)
-x.toExponential(5)              // '2.55500e+2'
-x.toFixed(5)                    // '255.50000'
-x.toPrecision(5)                // '255.50'
-```
+x.toExponential(5)                       // '2.55500e+2'
+x.toFixed(5)                             // '255.50000'
+x.toPrecision(5)                         // '255.50'
 
-and almost all of the methods of JavaScript's Math object are also replicated.
-
-```js
 Decimal.sqrt('6.98372465832e+9823')      // '8.3568682281821340204e+4911'
 Decimal.pow(2, 0.0979843)                // '1.0702770511687781839'
+
+// Using `toFixed()` to avoid exponential notation:
+x = new Decimal('0.0000001')
+x.toString()                             // '1e-7'
+x.toFixed()                              // '0.0000001'
 ```
 
-There are `isNaN` and `isFinite` methods, as `NaN` and `Infinity` are valid `Decimal` values,
+And there are `isNaN` and `isFinite` methods, as `NaN` and `Infinity` are valid `Decimal` values.
 
 ```js
 x = new Decimal(NaN)                                           // 'NaN'
@@ -135,7 +163,7 @@ y = new Decimal(Infinity)                                      // 'Infinity'
 x.isNaN() && !y.isNaN() && !x.isFinite() && !y.isFinite()      // true
 ```
 
-and a `toFraction` method with an optional *maximum denominator* argument
+There is also a `toFraction` method with an optional *maximum denominator* argument.
 
 ```js
 z = new Decimal(355)
@@ -144,27 +172,27 @@ pi.toFraction()              // [ '7853982301', '2500000000' ]
 pi.toFraction(1000)          // [ '355', '113' ]
 ```
 
-All calculations are rounded according to the number of significant digits and rounding mode
-specified by the `precision` and `rounding` properties of the Decimal constructor.
+All calculations are rounded according to the number of significant digits and rounding mode specified
+by the `precision` and `rounding` properties of the Decimal constructor.
 
-Multiple Decimal constructors can be created, each with their own independent configuration which
-applies to all Decimal numbers created from it.
+For advanced usage, multiple Decimal constructors can be created, each with their own independent
+configuration which applies to all Decimal numbers created from it.
 
 ```js
 // Set the precision and rounding of the default Decimal constructor
 Decimal.set({ precision: 5, rounding: 4 })
 
 // Create another Decimal constructor, optionally passing in a configuration object
-Decimal10 = Decimal.clone({ precision: 10, rounding: 1 })
+Dec = Decimal.clone({ precision: 9, rounding: 1 })
 
 x = new Decimal(5)
-y = new Decimal10(5)
+y = new Dec(5)
 
 x.div(3)                           // '1.6667'
-y.div(3)                           // '1.666666666'
+y.div(3)                           // '1.66666666'
 ```
 
-The value of a Decimal is stored in a floating point format in terms of its digits, exponent and sign.
+The value of a Decimal is stored in a floating point format in terms of its digits, exponent and sign, but these properties should be considered read-only.
 
 ```js
 x = new Decimal(-12345.67);
@@ -177,54 +205,42 @@ For further information see the [API](http://mikemcl.github.io/decimal.js/) refe
 
 ## Test
 
-The library can be tested using Node.js or a browser.
-
-The *test* directory contains the file *test.js* which runs all the tests when executed by Node,
-and the file *test.html* which runs all the tests when opened in a browser.
-
-To run all the tests, from a command-line at the root directory using npm
+To run the tests using Node.js from the root directory:
 
 ```bash
-$ npm test
+npm test
 ```
 
-or at the *test* directory using Node
+Each separate test module can also be executed individually, for example:
 
 ```bash
-$ node test
+node test/modules/toFraction
 ```
 
-Each separate test module can also be executed individually, for example, at the *test/modules* directory
+To run the tests in a browser, open *test/test.html*.
 
-```bash
-$ node toFraction
-```
+## Minify
 
-## Build
+Two minification examples:
 
-For Node, if [uglify-js](https://github.com/mishoo/UglifyJS2) is installed
+Using [uglify-js](https://github.com/mishoo/UglifyJS) to minify the *decimal.js* file:
 
 ```bash
 npm install uglify-js -g
+uglifyjs decimal.js --source-map url=decimal.min.js.map -c -m -o decimal.min.js
 ```
 
-then
+Using [terser](https://github.com/terser/terser) to minify the ES module version, *decimal.mjs*:
 
 ```bash
-npm run build
+npm install terser -g
+terser decimal.mjs --source-map url=decimal.min.mjs.map -c -m --toplevel -o decimal.min.mjs
 ```
 
-will create *decimal.min.js*, and a source map will also be added to the *doc* directory.
-
-
-## Feedback
-
-<a href='mailto:M8ch88l@gmail.com'>M8ch88l@gmail.com</a>
-
-BTC 16MjxmTB5EZxY5Uk9xyhfsu4n9gYxEJYkY
+```js
+import Decimal from './decimal.min.mjs';
+```
 
 ## Licence
 
-MIT.
-
-See *LICENCE.md*
+[The MIT Licence (Expat).](LICENCE.md)

bower.json

@@ -1,33 +0,0 @@
-{
-  "name": "decimal.js",
-  "main": "decimal.js",
-  "version": "7.1.0",
-  "homepage": "https://github.com/MikeMcl/decimal.js",
-  "authors": [
-    "Michael Mclaughlin <M8ch88l@gmail.com>"
-  ],
-  "description": "An arbitrary-precision Decimal type for JavaScript",
-  "moduleType": [
-    "amd",
-    "globals",
-    "node"
-  ],
-  "keywords": [
-    "arbitrary",
-    "precision",
-    "arithmetic",
-    "bignumber",
-    "decimal",
-    "float",
-    "biginteger",
-    "bigdecimal",
-    "bignum",
-    "math"
-  ],
-  "license": "MIT",
-  "ignore": [
-    ".*",
-    "*.json",
-    "test"
-  ]
-}

decimal.d.ts

@@ -0,0 +1,299 @@
+// Type definitions for decimal.js >=7.0.0
+// Project: https://github.com/MikeMcl/decimal.js
+// Definitions by: Michael Mclaughlin <https://github.com/MikeMcl>
+// Definitions: https://github.com/MikeMcl/decimal.js
+//
+// Documentation: http://mikemcl.github.io/decimal.js/
+//
+// Exports:
+//
+//   class     Decimal (default export)
+//   type      Decimal.Constructor
+//   type      Decimal.Instance
+//   type      Decimal.Modulo
+//   type      Decimal.Rounding
+//   type      Decimal.Value
+//   interface Decimal.Config
+//
+// Example (alternative syntax commented-out):
+//
+//   import {Decimal} from "decimal.js"
+//   //import Decimal from "decimal.js"
+//
+//   let r: Decimal.Rounding = Decimal.ROUND_UP;
+//   let c: Decimal.Configuration = {precision: 4, rounding: r};
+//   Decimal.set(c);
+//   let v: Decimal.Value = '12345.6789';
+//   let d: Decimal = new Decimal(v);
+//   //let d: Decimal.Instance = new Decimal(v);
+//
+// The use of compiler option `--strictNullChecks` is recommended.
+
+export default Decimal;
+
+export namespace Decimal {
+  export type Constructor = typeof Decimal;
+  export type Instance = Decimal;
+  export type Rounding = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8;
+  export type Modulo = Rounding | 9;
+  export type Value = string | number | Decimal;
+
+  // http://mikemcl.github.io/decimal.js/#constructor-properties
+  export interface Config {
+    precision?: number;
+    rounding?: Rounding;
+    toExpNeg?: number;
+    toExpPos?: number;
+    minE?: number;
+    maxE?: number;
+    crypto?: boolean;
+    modulo?: Modulo;
+    defaults?: boolean;
+  }
+}
+
+export declare class Decimal {
+  readonly d: number[];
+  readonly e: number;
+  readonly s: number;
+
+  constructor(n: Decimal.Value);
+
+  absoluteValue(): Decimal;
+  abs(): Decimal;
+
+  ceil(): Decimal;
+  
+  clampedTo(min: Decimal.Value, max: Decimal.Value): Decimal;
+  clamp(min: Decimal.Value, max: Decimal.Value): Decimal;
+
+  comparedTo(n: Decimal.Value): number;
+  cmp(n: Decimal.Value): number;
+
+  cosine(): Decimal;
+  cos(): Decimal;
+
+  cubeRoot(): Decimal;
+  cbrt(): Decimal;
+
+  decimalPlaces(): number;
+  dp(): number;
+
+  dividedBy(n: Decimal.Value): Decimal;
+  div(n: Decimal.Value): Decimal;
+
+  dividedToIntegerBy(n: Decimal.Value): Decimal;
+  divToInt(n: Decimal.Value): Decimal;
+
+  equals(n: Decimal.Value): boolean;
+  eq(n: Decimal.Value): boolean;
+
+  floor(): Decimal;
+
+  greaterThan(n: Decimal.Value): boolean;
+  gt(n: Decimal.Value): boolean;
+
+  greaterThanOrEqualTo(n: Decimal.Value): boolean;
+  gte(n: Decimal.Value): boolean;
+
+  hyperbolicCosine(): Decimal;
+  cosh(): Decimal;
+
+  hyperbolicSine(): Decimal;
+  sinh(): Decimal;
+
+  hyperbolicTangent(): Decimal;
+  tanh(): Decimal;
+
+  inverseCosine(): Decimal;
+  acos(): Decimal;
+
+  inverseHyperbolicCosine(): Decimal;
+  acosh(): Decimal;
+
+  inverseHyperbolicSine(): Decimal;
+  asinh(): Decimal;
+
+  inverseHyperbolicTangent(): Decimal;
+  atanh(): Decimal;
+
+  inverseSine(): Decimal;
+  asin(): Decimal;
+
+  inverseTangent(): Decimal;
+  atan(): Decimal;
+
+  isFinite(): boolean;
+
+  isInteger(): boolean;
+  isInt(): boolean;
+
+  isNaN(): boolean;
+
+  isNegative(): boolean;
+  isNeg(): boolean;
+
+  isPositive(): boolean;
+  isPos(): boolean;
+
+  isZero(): boolean;
+
+  lessThan(n: Decimal.Value): boolean;
+  lt(n: Decimal.Value): boolean;
+
+  lessThanOrEqualTo(n: Decimal.Value): boolean;
+  lte(n: Decimal.Value): boolean;
+
+  logarithm(n?: Decimal.Value): Decimal;
+  log(n?: Decimal.Value): Decimal;
+
+  minus(n: Decimal.Value): Decimal;
+  sub(n: Decimal.Value): Decimal;
+
+  modulo(n: Decimal.Value): Decimal;
+  mod(n: Decimal.Value): Decimal;
+
+  naturalExponential(): Decimal;
+  exp(): Decimal;
+
+  naturalLogarithm(): Decimal;
+  ln(): Decimal;
+
+  negated(): Decimal;
+  neg(): Decimal;
+
+  plus(n: Decimal.Value): Decimal;
+  add(n: Decimal.Value): Decimal;
+
+  precision(includeZeros?: boolean): number;
+  sd(includeZeros?: boolean): number;
+
+  round(): Decimal;
+
+  sine() : Decimal;
+  sin() : Decimal;
+
+  squareRoot(): Decimal;
+  sqrt(): Decimal;
+
+  tangent() : Decimal;
+  tan() : Decimal;
+
+  times(n: Decimal.Value): Decimal;
+  mul(n: Decimal.Value) : Decimal;
+
+  toBinary(significantDigits?: number): string;
+  toBinary(significantDigits: number, rounding: Decimal.Rounding): string;
+
+  toDecimalPlaces(decimalPlaces?: number): Decimal;
+  toDecimalPlaces(decimalPlaces: number, rounding: Decimal.Rounding): Decimal;
+  toDP(decimalPlaces?: number): Decimal;
+  toDP(decimalPlaces: number, rounding: Decimal.Rounding): Decimal;
+
+  toExponential(decimalPlaces?: number): string;
+  toExponential(decimalPlaces: number, rounding: Decimal.Rounding): string;
+
+  toFixed(decimalPlaces?: number): string;
+  toFixed(decimalPlaces: number, rounding: Decimal.Rounding): string;
+
+  toFraction(max_denominator?: Decimal.Value): Decimal[];
+
+  toHexadecimal(significantDigits?: number): string;
+  toHexadecimal(significantDigits: number, rounding: Decimal.Rounding): string;
+  toHex(significantDigits?: number): string;
+  toHex(significantDigits: number, rounding?: Decimal.Rounding): string;
+
+  toJSON(): string;
+
+  toNearest(n: Decimal.Value, rounding?: Decimal.Rounding): Decimal;
+
+  toNumber(): number;
+
+  toOctal(significantDigits?: number): string;
+  toOctal(significantDigits: number, rounding: Decimal.Rounding): string;
+
+  toPower(n: Decimal.Value): Decimal;
+  pow(n: Decimal.Value): Decimal;
+
+  toPrecision(significantDigits?: number): string;
+  toPrecision(significantDigits: number, rounding: Decimal.Rounding): string;
+
+  toSignificantDigits(significantDigits?: number): Decimal;
+  toSignificantDigits(significantDigits: number, rounding: Decimal.Rounding): Decimal;
+  toSD(significantDigits?: number): Decimal;
+  toSD(significantDigits: number, rounding: Decimal.Rounding): Decimal;
+
+  toString(): string;
+
+  truncated(): Decimal;
+  trunc(): Decimal;
+
+  valueOf(): string;
+
+  static abs(n: Decimal.Value): Decimal;
+  static acos(n: Decimal.Value): Decimal;
+  static acosh(n: Decimal.Value): Decimal;
+  static add(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static asin(n: Decimal.Value): Decimal;
+  static asinh(n: Decimal.Value): Decimal;
+  static atan(n: Decimal.Value): Decimal;
+  static atanh(n: Decimal.Value): Decimal;
+  static atan2(y: Decimal.Value, x: Decimal.Value): Decimal;
+  static cbrt(n: Decimal.Value): Decimal;
+  static ceil(n: Decimal.Value): Decimal;
+  static clamp(n: Decimal.Value, min: Decimal.Value, max: Decimal.Value): Decimal;
+  static clone(object?: Decimal.Config): Decimal.Constructor;
+  static config(object: Decimal.Config): Decimal.Constructor;
+  static cos(n: Decimal.Value): Decimal;
+  static cosh(n: Decimal.Value): Decimal;
+  static div(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static exp(n: Decimal.Value): Decimal;
+  static floor(n: Decimal.Value): Decimal;
+  static hypot(...n: Decimal.Value[]): Decimal;
+  static isDecimal(object: any): object is Decimal;
+  static ln(n: Decimal.Value): Decimal;
+  static log(n: Decimal.Value, base?: Decimal.Value): Decimal;
+  static log2(n: Decimal.Value): Decimal;
+  static log10(n: Decimal.Value): Decimal;
+  static max(...n: Decimal.Value[]): Decimal;
+  static min(...n: Decimal.Value[]): Decimal;
+  static mod(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static mul(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static noConflict(): Decimal.Constructor;   // Browser only
+  static pow(base: Decimal.Value, exponent: Decimal.Value): Decimal;
+  static random(significantDigits?: number): Decimal;
+  static round(n: Decimal.Value): Decimal;
+  static set(object: Decimal.Config): Decimal.Constructor;
+  static sign(n: Decimal.Value): number;
+  static sin(n: Decimal.Value): Decimal;
+  static sinh(n: Decimal.Value): Decimal;
+  static sqrt(n: Decimal.Value): Decimal;
+  static sub(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static sum(...n: Decimal.Value[]): Decimal;
+  static tan(n: Decimal.Value): Decimal;
+  static tanh(n: Decimal.Value): Decimal;
+  static trunc(n: Decimal.Value): Decimal;
+
+  static readonly default?: Decimal.Constructor;
+  static readonly Decimal?: Decimal.Constructor;
+
+  static readonly precision: number;
+  static readonly rounding: Decimal.Rounding;
+  static readonly toExpNeg: number;
+  static readonly toExpPos: number;
+  static readonly minE: number;
+  static readonly maxE: number;
+  static readonly crypto: boolean;
+  static readonly modulo: Decimal.Modulo;
+
+  static readonly ROUND_UP: 0;
+  static readonly ROUND_DOWN: 1;
+  static readonly ROUND_CEIL: 2;
+  static readonly ROUND_FLOOR: 3;
+  static readonly ROUND_HALF_UP: 4;
+  static readonly ROUND_HALF_DOWN: 5;
+  static readonly ROUND_HALF_EVEN: 6;
+  static readonly ROUND_HALF_CEIL: 7;
+  static readonly ROUND_HALF_FLOOR: 8;
+  static readonly EUCLID: 9;
+}

decimal.global.d.ts

@@ -0,0 +1,320 @@
+// Type definitions for decimal.js >=7.0.0
+// Project: https://github.com/MikeMcl/decimal.js
+// Definitions by: Michael Mclaughlin <https://github.com/MikeMcl>
+// Definitions: https://github.com/MikeMcl/decimal.js
+//
+// Documentation: http://mikemcl.github.io/decimal.js/
+//
+// Exports (available globally or when using import):
+//
+//   class     Decimal (default export)
+//   type      Decimal.Constructor
+//   type      Decimal.Instance
+//   type      Decimal.Modulo
+//   type      Decimal.Rounding
+//   type      Decimal.Value
+//   interface Decimal.Config
+//
+// Example (alternative syntax commented-out):
+//
+//   import {Decimal} from "decimal.js"
+//   //import Decimal from "decimal.js"
+//
+//   let r: Decimal.Rounding = Decimal.ROUND_UP;
+//   let c: Decimal.Configuration = {precision: 4, rounding: r};
+//   Decimal.set(c);
+//   let v: Decimal.Value = '12345.6789';
+//   let d: Decimal = new Decimal(v);
+//   //let d: Decimal.Instance = new Decimal(v);
+//
+// The use of compiler option `--strictNullChecks` is recommended.
+
+export default Decimal;
+
+export namespace Decimal {
+  export type Config = DecimalConfig;
+  export type Constructor = DecimalConstructor;
+  export type Instance = DecimalInstance;
+  export type Modulo = DecimalModulo;
+  export type Rounding = DecimalRounding;
+  export type Value = DecimalValue;
+}
+
+declare global {
+  const Decimal: DecimalConstructor;
+  type Decimal = DecimalInstance;
+
+  namespace Decimal {
+    type Config = DecimalConfig;
+    type Constructor = DecimalConstructor;
+    type Instance = DecimalInstance;
+    type Modulo = DecimalModulo;
+    type Rounding = DecimalRounding;
+    type Value = DecimalValue;
+  }
+}
+
+type DecimalInstance = Decimal;
+type DecimalConstructor = typeof Decimal;
+type DecimalValue = string | number | Decimal;
+type DecimalRounding = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8;
+type DecimalModulo = DecimalRounding | 9;
+
+// http://mikemcl.github.io/decimal.js/#constructor-properties
+interface DecimalConfig {
+  precision?: number;
+  rounding?: DecimalRounding;
+  toExpNeg?: number;
+  toExpPos?: number;
+  minE?: number;
+  maxE?: number;
+  crypto?: boolean;
+  modulo?: DecimalModulo;
+  defaults?: boolean;
+}
+
+export declare class Decimal {
+  readonly d: number[];
+  readonly e: number;
+  readonly s: number;
+
+  constructor(n: DecimalValue);
+
+  absoluteValue(): Decimal;
+  abs(): Decimal;
+
+  ceil(): Decimal;
+  
+  clampedTo(min: Decimal.Value, max: Decimal.Value): Decimal;
+  clamp(min: Decimal.Value, max: Decimal.Value): Decimal;
+
+  comparedTo(n: DecimalValue): number;
+  cmp(n: DecimalValue): number;
+
+  cosine(): Decimal;
+  cos(): Decimal;
+
+  cubeRoot(): Decimal;
+  cbrt(): Decimal;
+
+  decimalPlaces(): number;
+  dp(): number;
+
+  dividedBy(n: DecimalValue): Decimal;
+  div(n: DecimalValue): Decimal;
+
+  dividedToIntegerBy(n: DecimalValue): Decimal;
+  divToInt(n: DecimalValue): Decimal;
+
+  equals(n: DecimalValue): boolean;
+  eq(n: DecimalValue): boolean;
+
+  floor(): Decimal;
+
+  greaterThan(n: DecimalValue): boolean;
+  gt(n: DecimalValue): boolean;
+
+  greaterThanOrEqualTo(n: DecimalValue): boolean;
+  gte(n: DecimalValue): boolean;
+
+  hyperbolicCosine(): Decimal;
+  cosh(): Decimal;
+
+  hyperbolicSine(): Decimal;
+  sinh(): Decimal;
+
+  hyperbolicTangent(): Decimal;
+  tanh(): Decimal;
+
+  inverseCosine(): Decimal;
+  acos(): Decimal;
+
+  inverseHyperbolicCosine(): Decimal;
+  acosh(): Decimal;
+
+  inverseHyperbolicSine(): Decimal;
+  asinh(): Decimal;
+
+  inverseHyperbolicTangent(): Decimal;
+  atanh(): Decimal;
+
+  inverseSine(): Decimal;
+  asin(): Decimal;
+
+  inverseTangent(): Decimal;
+  atan(): Decimal;
+
+  isFinite(): boolean;
+
+  isInteger(): boolean;
+  isInt(): boolean;
+
+  isNaN(): boolean;
+
+  isNegative(): boolean;
+  isNeg(): boolean;
+
+  isPositive(): boolean;
+  isPos(): boolean;
+
+  isZero(): boolean;
+
+  lessThan(n: DecimalValue): boolean;
+  lt(n: DecimalValue): boolean;
+
+  lessThanOrEqualTo(n: DecimalValue): boolean;
+  lte(n: DecimalValue): boolean;
+
+  logarithm(n?: DecimalValue): Decimal;
+  log(n?: DecimalValue): Decimal;
+
+  minus(n: DecimalValue): Decimal;
+  sub(n: DecimalValue): Decimal;
+
+  modulo(n: DecimalValue): Decimal;
+  mod(n: DecimalValue): Decimal;
+
+  naturalExponential(): Decimal;
+  exp(): Decimal;
+
+  naturalLogarithm(): Decimal;
+  ln(): Decimal;
+
+  negated(): Decimal;
+  neg(): Decimal;
+
+  plus(n: DecimalValue): Decimal;
+  add(n: DecimalValue): Decimal;
+
+  precision(includeZeros?: boolean): number;
+  sd(includeZeros?: boolean): number;
+
+  round(): Decimal;
+
+  sine() : Decimal;
+  sin() : Decimal;
+
+  squareRoot(): Decimal;
+  sqrt(): Decimal;
+
+  tangent() : Decimal;
+  tan() : Decimal;
+
+  times(n: DecimalValue): Decimal;
+  mul(n: DecimalValue) : Decimal;
+
+  toBinary(significantDigits?: number): string;
+  toBinary(significantDigits: number, rounding: DecimalRounding): string;
+
+  toDecimalPlaces(decimalPlaces?: number): Decimal;
+  toDecimalPlaces(decimalPlaces: number, rounding: DecimalRounding): Decimal;
+  toDP(decimalPlaces?: number): Decimal;
+  toDP(decimalPlaces: number, rounding: DecimalRounding): Decimal;
+
+  toExponential(decimalPlaces?: number): string;
+  toExponential(decimalPlaces: number, rounding: DecimalRounding): string;
+
+  toFixed(decimalPlaces?: number): string;
+  toFixed(decimalPlaces: number, rounding: DecimalRounding): string;
+
+  toFraction(max_denominator?: DecimalValue): Decimal[];
+
+  toHexadecimal(significantDigits?: number): string;
+  toHexadecimal(significantDigits: number, rounding: DecimalRounding): string;
+  toHex(significantDigits?: number): string;
+  toHex(significantDigits: number, rounding?: DecimalRounding): string;
+
+  toJSON(): string;
+
+  toNearest(n: DecimalValue, rounding?: DecimalRounding): Decimal;
+
+  toNumber(): number;
+
+  toOctal(significantDigits?: number): string;
+  toOctal(significantDigits: number, rounding: DecimalRounding): string;
+
+  toPower(n: DecimalValue): Decimal;
+  pow(n: DecimalValue): Decimal;
+
+  toPrecision(significantDigits?: number): string;
+  toPrecision(significantDigits: number, rounding: DecimalRounding): string;
+
+  toSignificantDigits(significantDigits?: number): Decimal;
+  toSignificantDigits(significantDigits: number, rounding: DecimalRounding): Decimal;
+  toSD(significantDigits?: number): Decimal;
+  toSD(significantDigits: number, rounding: DecimalRounding): Decimal;
+
+  toString(): string;
+
+  truncated(): Decimal;
+  trunc(): Decimal;
+
+  valueOf(): string;
+
+  static abs(n: DecimalValue): Decimal;
+  static acos(n: DecimalValue): Decimal;
+  static acosh(n: DecimalValue): Decimal;
+  static add(x: DecimalValue, y: DecimalValue): Decimal;
+  static asin(n: DecimalValue): Decimal;
+  static asinh(n: DecimalValue): Decimal;
+  static atan(n: DecimalValue): Decimal;
+  static atanh(n: DecimalValue): Decimal;
+  static atan2(y: DecimalValue, x: DecimalValue): Decimal;
+  static cbrt(n: DecimalValue): Decimal;
+  static ceil(n: DecimalValue): Decimal;
+  static clamp(n: Decimal.Value, min: Decimal.Value, max: Decimal.Value): Decimal;
+  static clone(object?: DecimalConfig): DecimalConstructor;
+  static config(object: DecimalConfig): DecimalConstructor;
+  static cos(n: DecimalValue): Decimal;
+  static cosh(n: DecimalValue): Decimal;
+  static div(x: DecimalValue, y: DecimalValue): Decimal;
+  static exp(n: DecimalValue): Decimal;
+  static floor(n: DecimalValue): Decimal;
+  static hypot(...n: DecimalValue[]): Decimal;
+  static isDecimal(object: any): object is Decimal;
+  static ln(n: DecimalValue): Decimal;
+  static log(n: DecimalValue, base?: DecimalValue): Decimal;
+  static log2(n: DecimalValue): Decimal;
+  static log10(n: DecimalValue): Decimal;
+  static max(...n: DecimalValue[]): Decimal;
+  static min(...n: DecimalValue[]): Decimal;
+  static mod(x: DecimalValue, y: DecimalValue): Decimal;
+  static mul(x: DecimalValue, y: DecimalValue): Decimal;
+  static noConflict(): DecimalConstructor;   // Browser only
+  static pow(base: DecimalValue, exponent: DecimalValue): Decimal;
+  static random(significantDigits?: number): Decimal;
+  static round(n: DecimalValue): Decimal;
+  static set(object: DecimalConfig): DecimalConstructor;
+  static sign(n: DecimalValue): number;
+  static sin(n: DecimalValue): Decimal;
+  static sinh(n: DecimalValue): Decimal;
+  static sqrt(n: DecimalValue): Decimal;
+  static sub(x: DecimalValue, y: DecimalValue): Decimal;
+  static sum(...n: Decimal.Value[]): Decimal;
+  static tan(n: DecimalValue): Decimal;
+  static tanh(n: DecimalValue): Decimal;
+  static trunc(n: DecimalValue): Decimal;
+
+  static readonly default?: DecimalConstructor;
+  static readonly Decimal?: DecimalConstructor;
+
+  static readonly precision: number;
+  static readonly rounding: DecimalRounding;
+  static readonly toExpNeg: number;
+  static readonly toExpPos: number;
+  static readonly minE: number;
+  static readonly maxE: number;
+  static readonly crypto: boolean;
+  static readonly modulo: DecimalModulo;
+
+  static readonly ROUND_UP: 0;
+  static readonly ROUND_DOWN: 1;
+  static readonly ROUND_CEIL: 2;
+  static readonly ROUND_FLOOR: 3;
+  static readonly ROUND_HALF_UP: 4;
+  static readonly ROUND_HALF_DOWN: 5;
+  static readonly ROUND_HALF_EVEN: 6;
+  static readonly ROUND_HALF_CEIL: 7;
+  static readonly ROUND_HALF_FLOOR: 8;
+  static readonly EUCLID: 9;
+}

decimal.js

@@ -1,13 +1,12 @@
-/*! decimal.js v7.1.0 https://github.com/MikeMcl/decimal.js/LICENCE */
 ;(function (globalScope) {
   'use strict';
 
 
-  /*
-   *  decimal.js v7.1.0
+  /*!
+   *  decimal.js v10.4.3
    *  An arbitrary-precision Decimal type for JavaScript.
    *  https://github.com/MikeMcl/decimal.js
-   *  Copyright (c) 2016 Michael Mclaughlin <M8ch88l@gmail.com>
+   *  Copyright (c) 2022 Michael Mclaughlin <M8ch88l@gmail.com>
    *  MIT Licence
    */
 
@@ -34,7 +33,7 @@
 
 
     // The initial configuration properties of the Decimal constructor.
-    Decimal = {
+    DEFAULTS = {
 
       // These values must be integers within the stated ranges (inclusive).
       // Most of these values can be changed at run-time using the `Decimal.config` method.
@@ -99,13 +98,14 @@
   // ----------------------------------- END OF EDITABLE DEFAULTS ------------------------------- //
 
 
-    inexact, noConflict, quadrant,
+    Decimal, inexact, noConflict, quadrant,
     external = true,
 
     decimalError = '[DecimalError] ',
     invalidArgument = decimalError + 'Invalid argument: ',
     precisionLimitExceeded = decimalError + 'Precision limit exceeded',
     cryptoUnavailable = decimalError + 'crypto unavailable',
+    tag = '[object Decimal]',
 
     mathfloor = Math.floor,
     mathpow = Math.pow,
@@ -123,7 +123,7 @@
     PI_PRECISION = PI.length - 1,
 
     // Decimal.prototype object
-    P = {};
+    P = { toStringTag: tag };
 
 
   // Decimal prototype methods
@@ -132,6 +132,7 @@
   /*
    *  absoluteValue             abs
    *  ceil
+   *  clampedTo                 clamp
    *  comparedTo                cmp
    *  cosine                    cos
    *  cubeRoot                  cbrt
@@ -213,6 +214,27 @@
   };
 
 
+  /*
+   * Return a new Decimal whose value is the value of this Decimal clamped to the range
+   * delineated by `min` and `max`.
+   *
+   * min {number|string|Decimal}
+   * max {number|string|Decimal}
+   *
+   */
+  P.clampedTo = P.clamp = function (min, max) {
+    var k,
+      x = this,
+      Ctor = x.constructor;
+    min = new Ctor(min);
+    max = new Ctor(max);
+    if (!min.s || !max.s) return new Ctor(NaN);
+    if (min.gt(max)) throw Error(invalidArgument + max);
+    k = x.cmp(min);
+    return k < 0 ? min : x.cmp(max) > 0 ? max : new Ctor(x);
+  };
+
+
   /*
    * Return
    *   1    if the value of this Decimal is greater than the value of `y`,
@@ -318,7 +340,7 @@
     external = false;
 
     // Initial estimate.
-    s = x.s * Math.pow(x.s * x, 1 / 3);
+    s = x.s * mathpow(x.s * x, 1 / 3);
 
      // Math.cbrt underflow/overflow?
      // Pass x to Math.pow as integer, then adjust the exponent of the result.
@@ -328,7 +350,7 @@
 
       // Adjust n exponent so it is a multiple of 3 away from x exponent.
       if (s = (e - n.length + 1) % 3) n += (s == 1 || s == -2 ? '0' : '00');
-      s = Math.pow(n, 1 / 3);
+      s = mathpow(n, 1 / 3);
 
       // Rarely, e may be one less than the result exponent value.
       e = mathfloor((e + 1) / 3) - (e % 3 == (e < 0 ? -1 : 2));
@@ -547,7 +569,7 @@
     // TODO? Estimation reused from cosine() and may not be optimal here.
     if (len < 32) {
       k = Math.ceil(len / 3);
-      n = Math.pow(4, -k).toString();
+      n = (1 / tinyPow(4, k)).toString();
     } else {
       k = 16;
       n = '2.3283064365386962890625e-10';
@@ -627,8 +649,7 @@
       k = 1.4 * Math.sqrt(len);
       k = k > 16 ? 16 : k | 0;
 
-      x = x.times(Math.pow(5, -k));
-
+      x = x.times(1 / tinyPow(5, k));
       x = taylorSeries(Ctor, 2, x, x, true);
 
       // Reverse argument reduction
@@ -1730,7 +1751,7 @@
       e = mathfloor((e + 1) / 2) - (e < 0 || e % 2);
 
       if (s == 1 / 0) {
-        n = '1e' + e;
+        n = '5e' + e;
       } else {
         n = s.toExponential();
         n = n.slice(0, n.indexOf('e') + 1) + e;
@@ -1909,9 +1930,6 @@
     if (carry) ++e;
     else r.shift();
 
-    // Remove trailing zeros.
-    for (i = r.length; !r[--i];) r.pop();
-
     y.d = r;
     y.e = getBase10Exponent(r, e);
 
@@ -2115,16 +2133,9 @@
   };
 
 
-
   /*
-   * Returns a new Decimal whose value is the nearest multiple of the magnitude of `y` to the value
-   * of this Decimal.
-   *
-   * If the value of this Decimal is equidistant from two multiples of `y`, the rounding mode `rm`,
-   * or `Decimal.rounding` if `rm` is omitted, determines the direction of the nearest multiple.
-   *
-   * In the context of this method, rounding mode 4 (ROUND_HALF_UP) is the same as rounding mode 0
-   * (ROUND_UP), and so on.
+   * Returns a new Decimal whose value is the nearest multiple of `y` in the direction of rounding
+   * mode `rm`, or `Decimal.rounding` if `rm` is omitted, to the value of this Decimal.
    *
    * The return value will always have the same sign as this Decimal, unless either this Decimal
    * or `y` is NaN, in which case the return value will be also be NaN.
@@ -2153,7 +2164,11 @@
       rm = Ctor.rounding;
     } else {
       y = new Ctor(y);
-      if (rm !== void 0) checkInt32(rm, 0, 8);
+      if (rm === void 0) {
+        rm = Ctor.rounding;
+      } else {
+        checkInt32(rm, 0, 8);
+      }
 
       // If x is not finite, return x if y is not NaN, else NaN.
       if (!x.d) return y.s ? x : y;
@@ -2168,7 +2183,6 @@
     // If y is not zero, calculate the nearest multiple of y to x.
     if (y.d[0]) {
       external = false;
-      if (rm < 4) rm = [4, 5, 7, 8][rm];
       x = divide(x, y, 0, rm, 1).times(y);
       external = true;
       finalise(x);
@@ -2252,13 +2266,13 @@
    *
    */
   P.toPower = P.pow = function (y) {
-    var e, k, pr, r, rm, sign, yIsInt,
+    var e, k, pr, r, rm, s,
       x = this,
       Ctor = x.constructor,
       yn = +(y = new Ctor(y));
 
     // Either ±Infinity, NaN or ±0?
-    if (!x.d || !y.d || !x.d[0] || !y.d[0]) return  new Ctor(mathpow(+x, yn));
+    if (!x.d || !y.d || !x.d[0] || !y.d[0]) return new Ctor(mathpow(+x, yn));
 
     x = new Ctor(x);
 
@@ -2269,22 +2283,32 @@
 
     if (y.eq(1)) return finalise(x, pr, rm);
 
+    // y exponent
     e = mathfloor(y.e / LOG_BASE);
-    k = y.d.length - 1;
-    yIsInt = e >= k;
-    sign = x.s;
-
-    if (!yIsInt) {
-      if (sign < 0) return new Ctor(NaN);
 
     // If y is a small integer use the 'exponentiation by squaring' algorithm.
-    } else if ((k = yn < 0 ? -yn : yn) <= MAX_SAFE_INTEGER) {
+    if (e >= y.d.length - 1 && (k = yn < 0 ? -yn : yn) <= MAX_SAFE_INTEGER) {
       r = intPow(Ctor, x, k, pr);
       return y.s < 0 ? new Ctor(1).div(r) : finalise(r, pr, rm);
     }
 
-    // Result is negative if x is negative and the last digit of integer y is odd.
-    sign = sign < 0 && y.d[Math.max(e, k)] & 1 ? -1 : 1;
+    s = x.s;
+
+    // if x is negative
+    if (s < 0) {
+
+      // if y is not an integer
+      if (e < y.d.length - 1) return new Ctor(NaN);
+
+      // Result is positive if x is negative and the last digit of integer y is even.
+      if ((y.d[e] & 1) == 0) s = 1;
+
+      // if x.eq(-1)
+      if (x.e == 0 && x.d[0] == 1 && x.d.length == 1) {
+        x.s = s;
+        return x;
+      }
+    }
 
     // Estimate result exponent.
     // x^y = 10^e,  where e = y * log10(x)
@@ -2295,10 +2319,10 @@
       ? mathfloor(yn * (Math.log('0.' + digitsToString(x.d)) / Math.LN10 + x.e + 1))
       : new Ctor(k + '').e;
 
-    // Estimate may be incorrect e.g. x: 0.999999999999999999, y: 2.29, e: 0, r.e: -1.
+    // Exponent estimate may be incorrect e.g. x: 0.999999999999999999, y: 2.29, e: 0, r.e: -1.
 
     // Overflow/underflow?
-    if (e > Ctor.maxE + 1 || e < Ctor.minE - 1) return new Ctor(e > 0 ? sign / 0 : 0);
+    if (e > Ctor.maxE + 1 || e < Ctor.minE - 1) return new Ctor(e > 0 ? s / 0 : 0);
 
     external = false;
     Ctor.rounding = x.s = 1;
@@ -2312,24 +2336,28 @@
     // r = x^y = exp(y*ln(x))
     r = naturalExponential(y.times(naturalLogarithm(x, pr + k)), pr);
 
-    // Truncate to the required precision plus five rounding digits.
-    r = finalise(r, pr + 5, 1);
+    // r may be Infinity, e.g. (0.9999999999999999).pow(-1e+40)
+    if (r.d) {
 
-    // If the rounding digits are [49]9999 or [50]0000 increase the precision by 10 and recalculate
-    // the result.
-    if (checkRoundingDigits(r.d, pr, rm)) {
-      e = pr + 10;
+      // Truncate to the required precision plus five rounding digits.
+      r = finalise(r, pr + 5, 1);
 
-      // Truncate to the increased precision plus five rounding digits.
-      r = finalise(naturalExponential(y.times(naturalLogarithm(x, e + k)), e), e + 5, 1);
+      // If the rounding digits are [49]9999 or [50]0000 increase the precision by 10 and recalculate
+      // the result.
+      if (checkRoundingDigits(r.d, pr, rm)) {
+        e = pr + 10;
 
-      // Check for 14 nines from the 2nd rounding digit (the first rounding digit may be 4 or 9).
-      if (+digitsToString(r.d).slice(pr + 1, pr + 15) + 1 == 1e14) {
-        r = finalise(r, pr + 1, 0);
+        // Truncate to the increased precision plus five rounding digits.
+        r = finalise(naturalExponential(y.times(naturalLogarithm(x, e + k)), e), e + 5, 1);
+
+        // Check for 14 nines from the 2nd rounding digit (the first rounding digit may be 4 or 9).
+        if (+digitsToString(r.d).slice(pr + 1, pr + 15) + 1 == 1e14) {
+          r = finalise(r, pr + 1, 0);
+        }
       }
     }
 
-    r.s = sign;
+    r.s = s;
     external = true;
     Ctor.rounding = rm;
 
@@ -2440,18 +2468,6 @@
   };
 
 
-  /*
-  // Add aliases to match BigDecimal method names.
-  // P.add = P.plus;
-  P.subtract = P.minus;
-  P.multiply = P.times;
-  P.divide = P.div;
-  P.remainder = P.mod;
-  P.compareTo = P.cmp;
-  P.negate = P.neg;
-   */
-
-
   // Helper functions for Decimal.prototype (P) and/or Decimal methods, and their callers.
 
 
@@ -2623,16 +2639,18 @@
    *
    */
   function cosine(Ctor, x) {
-    var k, y,
-      len = x.d.length;
+    var k, len, y;
+
+    if (x.isZero()) return x;
 
     // Argument reduction: cos(4x) = 8*(cos^4(x) - cos^2(x)) + 1
     // i.e. cos(x) = 8*(cos^4(x/4) - cos^2(x/4)) + 1
 
     // Estimate the optimum number of times to use the argument reduction.
+    len = x.d.length;
     if (len < 32) {
       k = Math.ceil(len / 3);
-      y = Math.pow(4, -k).toString();
+      y = (1 / tinyPow(4, k)).toString();
     } else {
       k = 16;
       y = '2.3283064365386962890625e-10';
@@ -3127,14 +3145,15 @@
 
   // Calculate the base 10 exponent from the base 1e7 exponent.
   function getBase10Exponent(digits, e) {
+    var w = digits[0];
 
-    // First get the number of digits of the first word of the digits array.
-    for (var i = 1, w = digits[0]; w >= 10; w /= 10) i++;
-    return i + e * LOG_BASE - 1;
+    // Add the number of digits of the first word of the digits array.
+    for ( e *= LOG_BASE; w >= 10; w /= 10) e++;
+    return e;
   }
 
 
-   function getLn10(Ctor, sd, pr) {
+  function getLn10(Ctor, sd, pr) {
     if (sd > LN10_PRECISION) {
 
       // Reset global state in case the exception is caught.
@@ -3580,7 +3599,10 @@
   function parseOther(x, str) {
     var base, Ctor, divisor, i, isFloat, len, p, xd, xe;
 
-    if (str === 'Infinity' || str === 'NaN') {
+    if (str.indexOf('_') > -1) {
+      str = str.replace(/(\d)_(?=\d)/g, '$1');
+      if (isDecimal.test(str)) return parseDecimal(x, str);
+    } else if (str === 'Infinity' || str === 'NaN') {
       if (!+str) x.s = NaN;
       x.e = NaN;
       x.d = null;
@@ -3642,7 +3664,7 @@
     if (isFloat) x = divide(x, divisor, len * 4);
 
     // Multiply by the binary exponent part if present.
-    if (p) x = x.times(Math.abs(p) < 54 ? Math.pow(2, p) : Decimal.pow(2, p));
+    if (p) x = x.times(Math.abs(p) < 54 ? mathpow(2, p) : Decimal.pow(2, p));
     external = true;
 
     return x;
@@ -3658,7 +3680,9 @@
     var k,
       len = x.d.length;
 
-    if (len < 3) return taylorSeries(Ctor, 2, x, x);
+    if (len < 3) {
+      return x.isZero() ? x : taylorSeries(Ctor, 2, x, x);
+    }
 
     // Argument reduction: sin(5x) = 16*sin^5(x) - 20*sin^3(x) + 5*sin(x)
     // i.e. sin(x) = 16*sin^5(x/5) - 20*sin^3(x/5) + 5*sin(x/5)
@@ -3668,8 +3692,7 @@
     k = 1.4 * Math.sqrt(len);
     k = k > 16 ? 16 : k | 0;
 
-    // Max k before Math.pow precision loss is 22
-    x = x.times(Math.pow(5, -k));
+    x = x.times(1 / tinyPow(5, k));
     x = taylorSeries(Ctor, 2, x, x);
 
     // Reverse argument reduction
@@ -3722,6 +3745,14 @@
   }
 
 
+  // Exponent e must be positive and non-zero.
+  function tinyPow(b, e) {
+    var n = b;
+    while (--e) n *= b;
+    return n;
+  }
+
+
   // Return the absolute value of `x` reduced to less than or equal to half pi.
   function toLessThanHalfPi(Ctor, x) {
     var t,
@@ -3917,6 +3948,7 @@
    *  atan2
    *  cbrt
    *  ceil
+   *  clamp
    *  clone
    *  config
    *  cos
@@ -3942,6 +3974,7 @@
    *  sinh
    *  sqrt
    *  sub
+   *  sum
    *  tan
    *  tanh
    *  trunc
@@ -4135,6 +4168,19 @@
   }
 
 
+  /*
+   * Return a new Decimal whose value is `x` clamped to the range delineated by `min` and `max`.
+   *
+   * x {number|string|Decimal}
+   * min {number|string|Decimal}
+   * max {number|string|Decimal}
+   *
+   */
+  function clamp(x, min, max) {
+    return new this(x).clamp(min, max);
+  }
+
+
   /*
    * Configure global settings for a Decimal constructor.
    *
@@ -4148,6 +4194,7 @@
    *   minE       {number}
    *   modulo     {number}
    *   crypto     {boolean|number}
+   *   defaults   {true}
    *
    * E.g. Decimal.config({ precision: 20, rounding: 4 })
    *
@@ -4155,6 +4202,7 @@
   function config(obj) {
     if (!obj || typeof obj !== 'object') throw Error(decimalError + 'Object expected');
     var i, p, v,
+      useDefaults = obj.defaults === true,
       ps = [
         'precision', 1, MAX_DIGITS,
         'rounding', 0, 8,
@@ -4166,13 +4214,15 @@
       ];
 
     for (i = 0; i < ps.length; i += 3) {
-      if ((v = obj[p = ps[i]]) !== void 0) {
+      if (p = ps[i], useDefaults) this[p] = DEFAULTS[p];
+      if ((v = obj[p]) !== void 0) {
         if (mathfloor(v) === v && v >= ps[i + 1] && v <= ps[i + 2]) this[p] = v;
         else throw Error(invalidArgument + p + ': ' + v);
       }
     }
 
-    if ((v = obj[p = 'crypto']) !== void 0) {
+    if (p = 'crypto', useDefaults) this[p] = DEFAULTS[p];
+    if ((v = obj[p]) !== void 0) {
       if (v === true || v === false || v === 0 || v === 1) {
         if (v) {
           if (typeof crypto != 'undefined' && crypto &&
@@ -4244,10 +4294,29 @@
       x.constructor = Decimal;
 
       // Duplicate.
-      if (v instanceof Decimal) {
+      if (isDecimalInstance(v)) {
         x.s = v.s;
-        x.e = v.e;
-        x.d = (v = v.d) ? v.slice() : v;
+
+        if (external) {
+          if (!v.d || v.e > Decimal.maxE) {
+
+            // Infinity.
+            x.e = NaN;
+            x.d = null;
+          } else if (v.e < Decimal.minE) {
+
+            // Zero.
+            x.e = 0;
+            x.d = [0];
+          } else {
+            x.e = v.e;
+            x.d = v.d.slice();
+          }
+        } else {
+          x.e = v.e;
+          x.d = v.d ? v.d.slice() : v.d;
+        }
+
         return;
       }
 
@@ -4271,8 +4340,23 @@
         // Fast path for small integers.
         if (v === ~~v && v < 1e7) {
           for (e = 0, i = v; i >= 10; i /= 10) e++;
-          x.e = e;
-          x.d = [v];
+
+          if (external) {
+            if (e > Decimal.maxE) {
+              x.e = NaN;
+              x.d = null;
+            } else if (e < Decimal.minE) {
+              x.e = 0;
+              x.d = [0];
+            } else {
+              x.e = e;
+              x.d = [v];
+            }
+          } else {
+            x.e = e;
+            x.d = [v];
+          }
+
           return;
 
         // Infinity, NaN.
@@ -4290,10 +4374,12 @@
       }
 
       // Minus sign?
-      if (v.charCodeAt(0) === 45) {
+      if ((i = v.charCodeAt(0)) === 45) {
         v = v.slice(1);
         x.s = -1;
       } else {
+        // Plus sign?
+        if (i === 43) v = v.slice(1);
         x.s = 1;
       }
 
@@ -4315,6 +4401,7 @@
 
     Decimal.config = Decimal.set = config;
     Decimal.clone = clone;
+    Decimal.isDecimal = isDecimalInstance;
 
     Decimal.abs = abs;
     Decimal.acos = acos;
@@ -4327,6 +4414,7 @@
     Decimal.atan2 = atan2;
     Decimal.cbrt = cbrt;          // ES6
     Decimal.ceil = ceil;
+    Decimal.clamp = clamp;
     Decimal.cos = cos;
     Decimal.cosh = cosh;          // ES6
     Decimal.div = div;
@@ -4349,14 +4437,17 @@
     Decimal.sinh = sinh;          // ES6
     Decimal.sqrt = sqrt;
     Decimal.sub = sub;
+    Decimal.sum = sum;
     Decimal.tan = tan;
     Decimal.tanh = tanh;          // ES6
     Decimal.trunc = trunc;        // ES6
 
     if (obj === void 0) obj = {};
     if (obj) {
-      ps = ['precision', 'rounding', 'toExpNeg', 'toExpPos', 'maxE', 'minE', 'modulo', 'crypto'];
-      for (i = 0; i < ps.length;) if (!obj.hasOwnProperty(p = ps[i++])) obj[p] = this[p];
+      if (obj.defaults !== true) {
+        ps = ['precision', 'rounding', 'toExpNeg', 'toExpPos', 'maxE', 'minE', 'modulo', 'crypto'];
+        for (i = 0; i < ps.length;) if (!obj.hasOwnProperty(p = ps[i++])) obj[p] = this[p];
+      }
     }
 
     Decimal.config(obj);
@@ -4407,6 +4498,8 @@
    *
    * hypot(a, b, ...) = sqrt(a^2 + b^2 + ...)
    *
+   * arguments {number|string|Decimal}
+   *
    */
   function hypot() {
     var i, n,
@@ -4433,6 +4526,16 @@
   }
 
 
+  /*
+   * Return true if object is a Decimal instance (where Decimal is any Decimal constructor),
+   * otherwise return false.
+   *
+   */
+  function isDecimalInstance(obj) {
+    return obj instanceof Decimal || obj && obj.toStringTag === tag || false;
+  }
+
+
   /*
    * Return a new Decimal whose value is the natural logarithm of `x`, rounded to `precision`
    * significant digits using rounding mode `rounding`.
@@ -4671,6 +4774,8 @@
    *  -0    if x is -0,
    *   NaN  otherwise
    *
+   * x {number|string|Decimal}
+   *
    */
   function sign(x) {
     x = new this(x);
@@ -4727,6 +4832,28 @@
   }
 
 
+  /*
+   * Return a new Decimal whose value is the sum of the arguments, rounded to `precision`
+   * significant digits using rounding mode `rounding`.
+   *
+   * Only the result is rounded, not the intermediate calculations.
+   *
+   * arguments {number|string|Decimal}
+   *
+   */
+  function sum() {
+    var i = 0,
+      args = arguments,
+      x = new this(args[i]);
+
+    external = false;
+    for (; x.s && ++i < args.length;) x = x.plus(args[i]);
+    external = true;
+
+    return finalise(x, this.precision, this.rounding);
+  }
+
+
   /*
    * Return a new Decimal whose value is the tangent of `x`, rounded to `precision` significant
    * digits using rounding mode `rounding`.
@@ -4763,7 +4890,9 @@
 
 
   // Create and configure initial Decimal constructor.
-  Decimal = clone(Decimal);
+  Decimal = clone(DEFAULTS);
+  Decimal.prototype.constructor = Decimal;
+  Decimal['default'] = Decimal.Decimal = Decimal;
 
   // Create the internal constants from their string values.
   LN10 = new Decimal(LN10);
@@ -4781,13 +4910,17 @@
 
   // Node and other environments that support module.exports.
   } else if (typeof module != 'undefined' && module.exports) {
-    module.exports = Decimal.default = Decimal.Decimal = Decimal;
+    if (typeof Symbol == 'function' && typeof Symbol.iterator == 'symbol') {
+      P[Symbol['for']('nodejs.util.inspect.custom')] = P.toString;
+      P[Symbol.toStringTag] = 'Decimal';
+    }
+
+    module.exports = Decimal;
 
   // Browser.
   } else {
     if (!globalScope) {
-      globalScope = typeof self != 'undefined' && self && self.self == self
-        ? self : Function('return this')();
+      globalScope = typeof self != 'undefined' && self && self.self == self ? self : window;
     }
 
     noConflict = globalScope.Decimal;

doc/API.html

@@ -76,13 +76,15 @@ li span{float:right;margin-right:10px;color:#c0c0c0}
       <li><a href="#Datan2"     >atan2</a></li>
       <li><a href="#Dcbrt"      >cbrt</a></li>
       <li><a href="#Dceil"      >ceil</a></li>
-      <li><a href="#Dclone"     ><strong>clone</strong></a></li>
+      <li><a href="#Dclamp"     >clamp</a></li>
+      <li><a href="#Dclone"     >clone</a></li>
       <li><a href="#Dcos"       >cos</a></li>
       <li><a href="#Dcosh"      >cosh</a></li>
       <li><a href="#Ddiv"       >div</a></li>
       <li><a href="#Dexp"       >exp</a></li>
       <li><a href="#Dfloor"     >floor</a></li>
       <li><a href="#Dhypot"     >hypot</a></li>
+      <li><a href="#DisDecimal" >isDecimal</a></li>
       <li><a href="#Dln"        >ln</a></li>
       <li><a href="#Dlog"       >log</a></li>
       <li><a href="#Dlog2"      >log2</a></li>
@@ -91,16 +93,17 @@ li span{float:right;margin-right:10px;color:#c0c0c0}
       <li><a href="#Dmin"       >min</a></li>
       <li><a href="#Dmod"       >mod</a></li>
       <li><a href="#Dmul"       >mul</a></li>
-      <li><a href="#DnoConflict"><strong>noConflict</strong></a></li>
+      <li><a href="#DnoConflict">noConflict</a></li>
       <li><a href="#Dpow"       >pow</a></li>
       <li><a href="#Drandom"    >random</a></li>
       <li><a href="#Dround"     >round</a></li>
-      <li><a href="#Dset"       ><strong>set</strong></a></li>
+      <li><a href="#Dset"       >set</a></li>
       <li><a href="#Dsign"      >sign</a></li>
       <li><a href="#Dsin"       >sin</a></li>
       <li><a href="#Dsinh"      >sinh</a></li>
       <li><a href="#Dsqrt"      >sqrt</a></li>
       <li><a href="#Dsub"       >sub</a></li>
+      <li><a href="#Dsum"       >sum</a></li>
       <li><a href="#Dtan"       >tan</a></li>
       <li><a href="#Dtanh"      >tanh</a></li>
       <li><a href="#Dtrunc"     >trunc</a></li>
@@ -136,6 +139,7 @@ li span{float:right;margin-right:10px;color:#c0c0c0}
       <li><a href="#abs"          >absoluteValue           </a><span>abs</span>     </li>
       <li><a href="#ceil"         >ceil                    </a>                     </li>
       <li><a href="#cmp"          >comparedTo              </a><span>cmp</span>     </li>
+      <li><a href="#clamp"        >clampedTo               </a><span>clamp</span>   </li>
       <li><a href="#cos"          >cosine                  </a><span>cos</span>     </li>
       <li><a href="#cbrt"         >cubeRoot                </a><span>cbrt</span>    </li>
       <li><a href="#dp"           >decimalPlaces           </a><span>dp</span>      </li>
@@ -195,9 +199,9 @@ li span{float:right;margin-right:10px;color:#c0c0c0}
 
     <a href="#instance-properties">Properties</a>
     <ul>
-      <li><a href="#digits"  >d</a><span>digits</span></li>
-      <li><a href="#exponent">e</a><span>exponent</span></li>
-      <li><a href="#sign"    >s</a><span>sign</span></li>
+      <li><a href="#digits"   >d</a><span>digits</span></li>
+      <li><a href="#exponent" >e</a><span>exponent</span></li>
+      <li><a href="#sign"     >s</a><span>sign</span></li>
     </ul>
 
     <a href="#zero-nan-infinity">Zero, NaN &amp; Infinity</a>
@@ -297,6 +301,7 @@ new Decimal('0xff.8')                    // '255.5'
 
 new Decimal(0.046875)                    // '0.046875'
 new Decimal('0.046875000000')            // '0.046875'
+new Decimal('0.046_875_000_000')         // '0.046875'
 
 new Decimal(4.6875e-2)                   // '0.046875'
 new Decimal('468.75e-4')                 // '0.046875'
@@ -435,6 +440,16 @@ a.equals(b)                    // true</pre>
 
 
 
+    <h5 id="Dclamp">clamp<code class='inset'>.clamp(min, max) <i>&rArr; Decimal</i></code></h5>
+    <p>
+      <code>min</code>: <i>number|string|Decimal</i><br />
+      <code>max</code>: <i>number|string|Decimal</i>
+    </p>
+    <p>See <code><a href='#clamp'>clampedTo</a></code>.</p>
+    <pre>Decimal.clamp(10.1, 0, 10)     // '10'</pre>
+
+
+
     <h5 id="Dclone">
       clone
       <code class='inset'>.clone([object]) <i>&rArr; Decimal constructor</i></code>
@@ -446,24 +461,32 @@ a.equals(b)                    // true</pre>
       settings as <code>this</code> Decimal constructor if <code>object</code> is omitted.
     </p>
     <pre>Decimal.set({ precision: 5 })
-D9 = Decimal.clone({ precision: 9 })
+Decimal9 = Decimal.clone({ precision: 9 })
 
 a = new Decimal(1)
-b = new D9(1)
+b = new Decimal9(1)
 
 a.div(3)                           // 0.33333
 b.div(3)                           // 0.333333333
 
-// D9 = Decimal.clone({ precision: 9 }) is equivalent to:
-D9 = Decimal.clone()
-D9.set({ precision: 9 })</pre>
+// Decimal9 = Decimal.clone({ precision: 9 }) is equivalent to:
+Decimal9 = Decimal.clone()
+Decimal9.set({ precision: 9 })</pre>
+    <p>
+      If <code>object</code> has a <code>'defaults'</code> property with value <code>true</code>
+      then the new constructor will use the default configuration.
+    </p>
+    <pre>
+D1 = Decimal.clone({ defaults: true })
+
+// Use the defaults except for precision
+D2 = Decimal.clone({ defaults: true, precision: 50 })</pre>
     <p>
       It is not inefficient in terms of memory usage to use multiple Decimal constructors as
       functions are shared between them.
     </p>
 
 
-
     <h5 id="Dcos">cos<code class='inset'>.cos(x) <i>&rArr; Decimal</i></code></h5>
     <p><code>x</code>: <i>number|string|Decimal</i></p>
     <p>See <code><a href='#cos'>cosine</a></code>.</p>
@@ -537,6 +560,22 @@ a.equals(b)                    // true</pre>
 
 
 
+    <h5 id="DisDecimal">
+      isDecimal<code class='inset'>.isDecimal(object) <i>&rArr; boolean</i></code>
+    </h5>
+    <p><code>object</code>: <i>any</i></p>
+    <p>
+      Returns <code>true</code> if <code>object</code> is a Decimal instance (where Decimal is any
+      Decimal constructor), or <code>false</code> if it is not.
+    </p>
+    <pre>a = new Decimal(1)
+b = {}
+a instanceof Decimal           // true
+Decimal.isDecimal(a)           // true
+Decimal.isDecimal(b)           // false</pre>
+
+
+
     <h5 id="Dlog">log<code class='inset'>.log(x [, base]) <i>&rArr; Decimal</i></code></h5>
     <p>
       <code>x</code>: <i>number|string|Decimal</i><br />
@@ -576,7 +615,7 @@ a.equals(b)                    // true</pre>
 
 
     <h5 id="Dmax">
-      max<code class='inset'>.max([x [, y, ...]]) <i>&rArr; Decimal</i></code>
+      max<code class='inset'>.max(x [, y, ...]) <i>&rArr; Decimal</i></code>
     </h5>
     <p>
       <code>x</code>: <i>number|string|Decimal</i><br />
@@ -588,7 +627,7 @@ a.equals(b)                    // true</pre>
 
 
     <h5 id="Dmin">
-      min<code class='inset'>.min([x [, y, ...]]) <i>&rArr; Decimal</i></code>
+      min<code class='inset'>.min(x [, y, ...]) <i>&rArr; Decimal</i></code>
     </h5>
     <p>
       <code>x</code>: <i>number|string|Decimal</i><br />
@@ -672,12 +711,14 @@ a.equals(b)                    // true</pre>
     <p>
       If the value of <code>this</code> Decimal constructor's
       <a href='#crypto'><code>crypto</code></a> property is <code>true</code>, and the
-      <code>crypto</code> object is available in the host environment, the random digits of the
-      return value are generated by either <code>crypto.getRandomValues</code> (Web Cryptography API
-      in modern browsers) or <code>crypto.randomBytes</code> (Node.js), otherwise, if the the value
-      of the property is <code>false</code> the return value is generated by
+      <code>crypto</code> object is available globally in the host environment, the random digits of
+      the return value are generated by either <code>crypto.getRandomValues</code> (Web Cryptography
+      API in modern browsers) or <code>crypto.randomBytes</code> (Node.js), otherwise, if the the
+      value of the property is <code>false</code> the return value is generated by
       <code>Math.random</code> (fastest).
     </p>
+    <p>To make the <code>crypto</code> object available globally in Node.js use</p>
+    <pre>global.crypto = require('crypto')</pre>
     <p>
       If the value of <code>this</code> Decimal constructor's
       <a href='#crypto'><code>crypto</code></a> property is set <code>true</code> and the
@@ -693,7 +734,6 @@ Decimal.random()                    // '0.4117936847'
 Decimal.random(20)                  // '0.78193327636914089009'</pre>
 
 
-
     <h5 id="Dround">round<code class='inset'>.round(x) <i>&rArr; Decimal</i></code></h5>
     <p><code>x</code>: <i>number|string|Decimal</i></p>
     <p>See <code><a href='#round'>round</a></code>.</p>
@@ -719,6 +759,10 @@ a.equals(b)                    // true</pre>
       The values of the configuration object properties are checked for validity and then stored as
       equivalently-named properties of <code>this</code> Decimal constructor.
     </p>
+    <p>
+      If <code>object</code> has a <code>'defaults'</code> property with value <code>true</code>
+      then any unspecified properties will be reset to their default values.
+    </p>
     <p>Throws on an invalid <code>object</code> or configuration property value.</p>
     <pre>
 // Defaults
@@ -731,11 +775,17 @@ Decimal.set({
     minE: -9e15,
     modulo: 1,
     crypto: false
-})</pre>
+})
+
+// Reset all properties to their default values
+Decimal.set({ defaults: true })
+
+// Set precision to 50 and all other properties to their default values
+Decimal.set({ precision: 50, defaults: true })</pre>
     <p>
       The properties of a Decimal constructor can also be set by direct assignment, but that will
       by-pass the validity checking that this method performs - this is not a problem if the user
-      knows that the assingment is valid.
+      knows that the assignment is valid.
     </p>
     <pre>Decimal.precision = 40</pre>
 
@@ -797,7 +847,7 @@ a.equals(b)                    // true</pre>
 
 
 
-      <h5 id="Dsub">sub<code class='inset'>.sub(x, y) <i>&rArr; Decimal</i></code></h5>
+    <h5 id="Dsub">sub<code class='inset'>.sub(x, y) <i>&rArr; Decimal</i></code></h5>
     <p>
       <code>x</code>: <i>number|string|Decimal</i><br />
       <code>y</code>: <i>number|string|Decimal</i>
@@ -809,7 +859,26 @@ a.equals(b)                    // true</pre>
 
 
 
-     <h5 id="Dtan">tan<code class='inset'>.tan(x) <i>&rArr; Decimal</i></code></h5>
+    <h5 id="Dsum">sum<code class='inset'>.sum(x [, y, ...]) <i>&rArr; Decimal</i></code></h5>
+    <p>
+      <code>x</code>: <i>number|string|Decimal</i><br />
+      <code>y</code>: <i>number|string|Decimal</i>
+    </p>
+    <p>
+      Returns a new Decimal whose value is the sum of the <code>arguments</code>,
+      rounded to <a href='#precision'><code>precision</code></a> significant digits using
+      rounding mode <a href='#rounding'><code>rounding</code></a>.<br />
+      Only the result is rounded, not the intermediate summations.
+    </p>
+    <pre>
+x = 5
+y = '16'
+z = new Decimal(-11)
+Decimal.sum(x, y, z)           // '10'</pre>
+
+
+
+    <h5 id="Dtan">tan<code class='inset'>.tan(x) <i>&rArr; Decimal</i></code></h5>
     <p><code>x</code>: <i>number|string|Decimal</i></p>
     <p>See <code><a href='#tan'>tangent</a></code>.</p>
     <pre>a = Decimal.tan(x)
@@ -874,12 +943,18 @@ Decimal.precision = 0
       All functions which return a Decimal will round the return value to <code>precision</code>
       significant digits except <a href='#decimal'><code>Decimal</code></a>,
       <a href='#abs'><code>absoluteValue</code></a>,
-      <a href='#ceil'><code>ceil</code></a>, <a href='#floor'><code>floor</code></a>,
-      <a href='#neg'><code>negated</code></a>, <a href='#round'><code>round</code></a>,
+      <a href='#ceil'><code>ceil</code></a>,
+      <a href='#clamp'><code>clampedTo</code></a>,
+      <a href='#floor'><code>floor</code></a>,
+      <a href='#neg'><code>negated</code></a>,
+      <a href='#round'><code>round</code></a>,
       <a href='#toDP'><code>toDecimalPlaces</code></a>,
       <a href='#toNearest'><code>toNearest</code></a> and
       <a href='#trunc'><code>truncated</code></a>.
     </p>
+    <p>
+      See <code><a href='#Pi'>Pi</a></code> for the precision limit of the trigonometric methods.
+    </p>
     <pre>Decimal.set({ precision: 5 })
 Decimal.precision                  // 5</pre>
 
@@ -934,7 +1009,7 @@ new Decimal('1e-500')              // '1e-500'
 new Decimal('9.9e-501')            // '0'
 
 Decimal.set({ minE: -3 })
-new Decimal(0.001)                 // '0.01'       e is -3
+new Decimal(0.001)                 // '0.001'       e is -3
 new Decimal(0.0001)                // '0'          e is -4</pre>
     <p>
       The smallest possible magnitude of a non-zero Decimal is <code>1e-9000000000000000</code>
@@ -1097,7 +1172,11 @@ Decimal.modulo                     // 9</pre>
       used.
     </p>
     <p>See <a href='#Drandom'><code>random</code></a>.</p>
-    <pre>Decimal.crypto                     // false
+    <pre>
+// Node.js
+global.crypto = require('crypto')
+
+Decimal.crypto                     // false
 Decimal.set({ crypto: true })
 Decimal.crypto                     // true</pre>
 
@@ -1201,6 +1280,28 @@ y.ceil()                      // '-1'</pre>
 
 
 
+    <h5 id="clamp">clampedTo<code class='inset'>.clamp(min, max) <i>&rArr; Decimal</i></code></h5>
+    <p>
+      <code>min</code>: <i>number|string|Decimal</i><br />
+      <code>max</code>: <i>number|string|Decimal</i>
+    </p>
+    <p>
+      Returns a new Decimal whose value is the value of this Decimal clamped to the range
+      delineated by <code>min</code> and <code>max</code>.
+    </p>
+    <p>
+      The return value is not affected by the value of the
+      <a href='#precision'><code>precision</code></a> setting.
+    </p>
+    <pre>
+x = new Decimal(5)
+min = new Decimal(100)
+max = new Decimal(Infinity)
+x.clampedTo(min, max)         // '100'
+x.clamp(-10, -0.1)            // '-0.1'</pre>
+
+
+
     <h5 id="cmp">comparedTo<code class='inset'>.cmp(x) <i>&rArr; number</i></code></h5>
     <p><code>x</code>: <i>number|string|Decimal</i></p>
     <table>
@@ -1241,7 +1342,7 @@ y.cmp(NaN)                     // NaN</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-1, 1</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0.25)
 x.cosine()                      // '0.96891242171064478414'
@@ -1391,7 +1492,7 @@ new Decimal(1).gte(x)                    // true</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>1, Infinity</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(1)
 x.hyperbolicCosine()                     // '1.5430806348152437785'
@@ -1410,7 +1511,7 @@ y.cosh()                                 // '1.1276259652063807852'</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-Infinity, Infinity</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(1)
 x.hyperbolicSine()                       // '1.1752011936438014569'
@@ -1429,7 +1530,7 @@ y.sinh()                                 // '0.52109530549374736162'</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-1, 1</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(1)
 x.hyperbolicTangent()                    // '0.76159415595576488812'
@@ -1448,7 +1549,7 @@ y.tanh()                                 // '0.4621171572600097585'</pre>
       Domain: [<code>-1, 1</code>]<br />
       Range: [<code>0, pi</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0)
 x.inverseCosine()                        // '1.5707963267948966192'
@@ -1469,7 +1570,7 @@ y.acos()                                 // '1.0471975511965977462'</pre>
       Domain: [<code>1, Infinity</code>]<br />
       Range: [<code>0, Infinity</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(5)
 x.inverseHyperbolicCosine()              // '2.2924316695611776878'
@@ -1490,7 +1591,7 @@ y.acosh()                                // '4.6050701709847571595'</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-Infinity, Infinity</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(5)
 x.inverseHyperbolicSine()                // '2.3124383412727526203'
@@ -1511,7 +1612,7 @@ y.asinh()                                // '4.6052701709914238266'</pre>
       Domain: [<code>-1, 1</code>]<br />
       Range: [<code>-Infinity, Infinity</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0.5)
 x.inverseHyperbolicTangent()             // '0.5493061443340548457'
@@ -1530,7 +1631,7 @@ y.atanh()                                // '0.97295507452765665255'</pre>
       Domain: [<code>-1, 1</code>]<br />
       Range: [<code>-pi/2, pi/2</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0.5)
 x.inverseSine()                          // '0.52359877559829887308'
@@ -1549,7 +1650,7 @@ y.asin()                                 // '0.84806207898148100805'</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-pi/2, pi/2</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0.5)
 x.inverseTangent()                       // '0.46364760900080611621'
@@ -1570,10 +1671,6 @@ x = new Decimal(1)
 x.isFinite()                             // true
 y = new Decimal(Infinity)
 y.isFinite()                             // false</pre>
-    <p>
-      Note: The native method <code>isFinite()</code> can be used if
-      <code>n &lt;= Number.MAX_VALUE</code>.
-    </p>
 
 
 
@@ -1600,7 +1697,6 @@ x = new Decimal(NaN)
 x.isNaN()                                // true
 y = new Decimal('Infinity')
 y.isNaN()                                // false</pre>
-    <p>Note: The native method <code>isNaN()</code> can also be used.</p>
 
 
 
@@ -1614,7 +1710,14 @@ x = new Decimal(-0)
 x.isNegative()                           // true
 y = new Decimal(2)
 y.isNeg                                  // false</pre>
-    <p>Note: <code>n &lt; 0</code> can be used if <code>n &lt;= -Number.MIN_VALUE</code>.</p>
+    <p>Note that zero is signed.</p>
+    <pre>
+new Decimal(0).valueOf()                 // '0'
+new Decimal(0).isNegative()              // false
+new Decimal(0).negated().valueOf()       // '-0'
+new Decimal(0).negated().isNegative()    // true
+new Decimal(-0).isNegative()             // true
+    </pre>
 
 
 
@@ -1628,7 +1731,6 @@ x = new Decimal(0)
 x.isPositive()                           // true
 y = new Decimal(-2)
 y.isPos                                  // false</pre>
-    <p>Note: <code>n &lt; 0</code> can be used if <code>n &lt;= -Number.MIN_VALUE</code>.</p>
 
 
 
@@ -1642,7 +1744,6 @@ x = new Decimal(-0)
 x.isZero() && x.isNeg()                  // true
 y = new Decimal(Infinity)
 y.isZero()                               // false</pre>
-    <p>Note: <code>n == 0</code> can be used if <code>n &gt;= Number.MIN_VALUE</code>.</p>
 
 
 
@@ -1701,7 +1802,8 @@ y.log(2)                                 // '8'</pre>
     <p>Logarithms to base <code>2</code> or <code>10</code> will always be correctly rounded.</p>
     <p>
       See <a href='#pow'><code>toPower</code></a> for the circumstances in which this method may
-      return an incorrectly rounded result.
+      return an incorrectly rounded result, and see <a href='#ln'><code>naturalLogarithm</code></a>
+      for the precision limit.
     </p>
     <p>The performance of this method degrades exponentially with increasing digits.</p>
 
@@ -1888,7 +1990,7 @@ x                                        // '1234.5'</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-1, 1</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0.5)
 x.sine()                                 // '0.47942553860420300027'
@@ -1930,7 +2032,7 @@ y.sqrt().eq( y.pow(0.5) )                // true</pre>
       Domain: [<code>-Infinity, Infinity</code>]<br />
       Range: [<code>-Infinity, Infinity</code>]
     </p>
-    <p>See <a href='#Pi'><code>Pi</code></a>.</p>
+    <p>See <a href='#Pi'><code>Pi</code></a> for the precision limit of this method.</p>
     <pre>
 x = new Decimal(0.5)
 x.tangent()                              // '0.54630248984379051326'
@@ -2004,9 +2106,9 @@ x.toBinary(1)                            // '0b1p+8'</pre>
     </p>
     <p>Throws on an invalid <code>dp</code> or <code>rm</code> value.</p>
     <pre>
-x = new Decimal(12.24567)
-x.toDecimalPlaces(0)                // '12'
-x.toDecimalPlaces(1, 0)             // '12.3'
+x = new Decimal(12.34567)
+x.toDecimalPlaces(0)                      // '12'
+x.toDecimalPlaces(1, Decimal.ROUND_UP)    // '12.4'
 
 y = new Decimal(9876.54321)
 y.toDP(3)                           // '9876.543'
@@ -2042,16 +2144,16 @@ y.toDP(1, Decimal.ROUND_DOWN)       // '9876.5'</pre>
     <p>Throws on an invalid <code>dp</code> or <code>rm</code> value.</p>
     <pre>
 x = 45.6
-b = new Decimal(x)
-x.toExponential()              // '4.56e+1'
-y.toExponential()              // '4.56e+1'
-x.toExponential(0)             // '5e+1'
-y.toExponential(0)             // '5e+1'
-x.toExponential(1)             // '4.6e+1'
-y.toExponential(1)             // '4.6e+1'
-y.toExponential(1, 1)          // '4.5e+1'  (ROUND_DOWN)
-x.toExponential(3)             // '4.560e+1'
-y.toExponential(3)             // '4.560e+1'</pre>
+y = new Decimal(x)
+x.toExponential()                        // '4.56e+1'
+y.toExponential()                        // '4.56e+1'
+x.toExponential(0)                       // '5e+1'
+y.toExponential(0)                       // '5e+1'
+x.toExponential(1)                       // '4.6e+1'
+y.toExponential(1)                       // '4.6e+1'
+y.toExponential(1, Decimal.ROUND_DOWN)   // '4.5e+1'
+x.toExponential(3)                       // '4.560e+1'
+y.toExponential(3)                       // '4.560e+1'</pre>
 
 
 
@@ -2090,15 +2192,15 @@ y.toExponential(3)             // '4.560e+1'</pre>
     <p>Throws on an invalid <code>dp</code> or <code>rm</code> value.</p>
     <pre>
 x = 3.456
-b = new Decimal(x)
-x.toFixed()              // '3'
-y.toFixed()              // '3.456'
-y.toFixed(0)             // '3'
-x.toFixed(2)             // '3.46'
-y.toFixed(2)             // '3.46'
-y.toFixed(2, 1)          // '3.45'  (ROUND_DOWN)
-x.toFixed(5)             // '3.45600'
-y.toFixed(5)             // '3.45600'</pre>
+y = new Decimal(x)
+x.toFixed()                       // '3'
+y.toFixed()                       // '3.456'
+y.toFixed(0)                      // '3'
+x.toFixed(2)                      // '3.46'
+y.toFixed(2)                      // '3.46'
+y.toFixed(2, Decimal.ROUND_DOWN)  // '3.45'
+x.toFixed(5)                      // '3.45600'
+y.toFixed(5)                      // '3.45600'</pre>
 
 
 
@@ -2170,25 +2272,16 @@ x.toHex(1)                               // '0x1p+8'</pre>
 
 
     <h5 id="toNearest">
-      toNearest<code class='inset'>.toNearest(n [, rm]) <i>&rArr; Decimal</i></code>
+      toNearest<code class='inset'>.toNearest(x [, rm]) <i>&rArr; Decimal</i></code>
     </h5>
     <p>
       <code>x</code>: <i>number|string|Decimal</i><br />
       <code>rm</code>: <i>number</i>: integer, <code>0</code> to <code>8</code> inclusive
     </p>
     <p>
-      Returns a new Decimal whose value is the nearest multiple of <code>x</code> to the value of
-      this Decimal.
-    </p>
-     <p>
-      If the value of this Decimal is equidistant from two multiples of <code>x</code>, the rounding
-      mode <code>rm</code>, or <a href='#rounding'><code>rounding</code></a> if <code>rm</code> is
-      omitted, determines the direction of the nearest.
-    </p>
-    <p>
-      In this context, rounding mode <a href='#rounding'><code>ROUND_HALF_UP</code></a> is
-      interpreted the same as rounding mode <a href='#rounding'><code>ROUND_UP</code></a>, and so
-      on, i.e. the rounding is either up, down, to ceil, to floor or to even.
+      Returns a new Decimal whose value is the nearest multiple of <code>x</code> in the direction
+      of rounding mode <code>rm</code>, or <a href='#rounding'><code>rounding</code></a> if
+      <code>rm</code> is omitted, to the value of this Decimal.
     </p>
     <p>
       The return value will always have the same sign as this Decimal, unless either this Decimal
@@ -2201,11 +2294,11 @@ x.toHex(1)                               // '0x1p+8'</pre>
     </p>
     <pre>
 x = new Decimal(1.39)
-x.toNearest(0.25)              // '1.5'
+x.toNearest(0.25)                        // '1.5'
 
-y = new Decimal(0.75)          // equidistant from 0.5 and 1
-y.toNearest(0.5, 0)            // '1'    (ROUND_UP)
-y.toNearest(0.5, 1)            // '0.5'  (ROUND_DOWN)</pre>
+y = new Decimal(9.499)
+y.toNearest(0.5, Decimal.ROUND_UP)       // '9.5'
+y.toNearest(0.5, Decimal.ROUND_DOWN)     // '9'</pre>
 
 
 
@@ -2348,13 +2441,13 @@ new Decimal(28).pow('6.166675020000903537297764507632802193308677149')
     <p>Throws on an invalid <code>sd</code> or <code>rm</code> value.</p>
     <pre>
 x = 45.6
-b = new Decimal(x)
+y = new Decimal(x)
 x.toPrecision()                          // '45.6'
 y.toPrecision()                          // '45.6'
 x.toPrecision(1)                         // '5e+1'
 y.toPrecision(1)                         // '5e+1'
-y.toPrecision(2, 0)                      // '4.6e+1'  (ROUND_UP)
-y.toPrecision(2, 1)                      // '4.5e+1'  (ROUND_DOWN)
+y.toPrecision(2, Decimal.ROUND_UP)       // '46'
+y.toPrecision(2, Decimal.ROUND_DOWN)     // '45'
 x.toPrecision(5)                         // '45.600'
 y.toPrecision(5)                         // '45.600'</pre>
 
@@ -2473,9 +2566,9 @@ x.valueOf()                              // '-0'</pre>
         <td><code>-1</code>, <code>1</code>, or <code>NaN</code></td>
       </tr>
     </table>
-    <p>The properties are best considered to be read-only.</p>
+    <p>All the properties are best considered to be read-only.</p>
     <p>
-      As with JavaScript numbers, the original exponent and fractional trailing zeros of a number
+      As with JavaScript numbers, the original exponent and fractional trailing zeros of a value
       are not preserved.
     </p>
     <pre>
@@ -2563,13 +2656,27 @@ try {
     </p>
     <p>
       It has a precision of <code>1025</code> digits, meaning that the trigonometric methods
-      can accurately calculate up to at least <code>1000</code> digits.
+      can calculate up to just over <code>1000</code> digits, but the actual figure depends on the
+      precision of the argument passed to them. To calculate the actual figure use:
+    </p>
+    <p><b>maximum_result_precision = 1000 - argument_precision</b></p>
+      For example, the following both work fine:
+    <pre>
+Decimal.set({precision: 991}).tan(123456789)
+Decimal.set({precision: 9}).tan(991_digit_number)</pre>
+    <p>
+      as, for each, the result precision plus the argument precision, i.e. <code>991 + 9</code> and
+      <code>9 + 991</code>, is less than or equal to <code>1000</code>.
     </p>
     <p>
       If greater precision is required then the value of <code>PI</code> will need to be extended to
-      about <code>25</code> digits more than the precision required.
+      about <code>25</code> digits more than the precision required. The time taken by the methods
+      will then be the limiting factor.
+    </p>
+    <p>
+      The value can also be shortened to reduce the size of the source file if such high precision
+      is not required.
     </p>
-    <p>The value can also be shortened to reduce the size of the source file.</p>
     <p>To get the value of pi:</p>
     <pre>
 pi = Decimal.acos(-1)</pre>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "decimal.js",
   "description": "An arbitrary-precision Decimal type for JavaScript.",
-  "version": "7.1.0",
+  "version": "10.4.3",
   "keywords": [
     "arbitrary",
     "precision",
@@ -20,14 +20,36 @@
     "type": "git",
     "url": "https://github.com/MikeMcl/decimal.js.git"
   },
-  "main": "decimal.js",
+  "main": "decimal",
+  "module": "decimal.mjs",
+  "browser": "decimal.js",
+  "exports": {
+    ".": {
+      "types": "./decimal.d.ts",
+      "import": "./decimal.mjs",
+      "require": "./decimal.js"
+    },
+    "./decimal.mjs": "./decimal.mjs",
+    "./decimal.js": "./decimal.js",
+    "./package.json": "./package.json",
+    "./decimal": {
+      "types": "./decimal.d.ts",
+      "import": "./decimal.mjs",
+      "require": "./decimal.js"
+    }
+  },
   "author": {
     "name": "Michael Mclaughlin",
     "email": "M8ch88l@gmail.com"
   },
   "license": "MIT",
   "scripts": {
-    "test": "node ./test/test.js",
-    "build": "uglifyjs decimal.js --source-map doc/decimal.js.map -c -m -o decimal.min.js --preamble \"/* decimal.js v7.1.0 https://github.com/MikeMcl/decimal.js/LICENCE */\""
-  }
+    "test": "node ./test/test.js"
+  },
+  "types": "decimal.d.ts",
+  "files": [
+    "decimal.js",
+    "decimal.mjs",
+    "decimal.d.ts"
+  ]
 }

test/modules/Decimal.js

@@ -124,6 +124,7 @@ T('Decimal', function () {
   t('0', '0b0');
   t('0', '0B0');
   t('-5', '-0b101');
+  t('5', '+0b101');
   t('1.5', '0b1.1');
   t('-1.5', '-0b1.1');
 
@@ -139,6 +140,7 @@ T('Decimal', function () {
   // Octal.
   t('8', '0o10');
   t('-8.5', '-0O010.4');
+  t('8.5', '+0O010.4');
   t('-262144.000000059604644775390625', '-0o1000000.00000001');
   t('572315667420.390625', '0o10250053005734.31');
 
@@ -146,6 +148,7 @@ T('Decimal', function () {
   t('1', '0x00001');
   t('255', '0xff');
   t('-15.5', '-0Xf.8');
+  t('15.5', '+0Xf.8');
   t('-16777216.00000000023283064365386962890625', '-0x1000000.00000001');
   t('325927753012307620476767402981591827744994693483231017778102969592507', '0xc16de7aa5bf90c3755ef4dea45e982b351b6e00cd25a82dcfe0646abb');
 
@@ -156,14 +159,18 @@ T('Decimal', function () {
   }
 
   t('NaN', NaN);
+  t('NaN', -NaN);
   t('NaN', 'NaN');
   t('NaN', '-NaN');
+  t('NaN', '+NaN');
 
   tx(function () {new Decimal(' NaN')}, "' NaN'");
   tx(function () {new Decimal('NaN ')}, "'NaN '");
   tx(function () {new Decimal(' NaN ')}, "' NaN '");
-  tx(function () {new Decimal('+NaN')}, "'+NaN'");
+  tx(function () {new Decimal(' -NaN')}, "' -NaN'");
   tx(function () {new Decimal(' +NaN')}, "' +NaN'");
+  tx(function () {new Decimal('-NaN ')}, "'-NaN '");
+  tx(function () {new Decimal('+NaN ')}, "'+NaN '");
   tx(function () {new Decimal('.NaN')}, "'.NaN'");
   tx(function () {new Decimal('NaN.')}, "'NaN.'");
 
@@ -171,11 +178,12 @@ T('Decimal', function () {
   t('-Infinity', -Infinity);
   t('Infinity', 'Infinity');
   t('-Infinity', '-Infinity');
+  t('Infinity', '+Infinity');
 
   tx(function () {new Decimal(' Infinity')}, "' Infinity '");
   tx(function () {new Decimal('Infinity ')}, "'Infinity '");
   tx(function () {new Decimal(' Infinity ')}, "' Infinity '");
-  tx(function () {new Decimal('+Infinity')}, "'+Infinity'");
+  tx(function () {new Decimal(' -Infinity')}, "' -Infinity'");
   tx(function () {new Decimal(' +Infinity')}, "' +Infinity'");
   tx(function () {new Decimal('.Infinity')}, "'.Infinity'");
   tx(function () {new Decimal('Infinity.')}, "'Infinity.'");
@@ -197,7 +205,7 @@ T('Decimal', function () {
   tx(function () {new Decimal('0-')}, "'0-'");
   tx(function () {new Decimal(' -0')}, "' -0'");
   tx(function () {new Decimal('-0 ')}, "'-0 '");
-  tx(function () {new Decimal('+0')}, "'+0'");
+  tx(function () {new Decimal('+0 ')}, "'+0 '");
   tx(function () {new Decimal(' +0')}, "' +0'");
   tx(function () {new Decimal(' .0')}, "' .0'");
   tx(function () {new Decimal('0. ')}, "'0. '");
@@ -222,12 +230,16 @@ T('Decimal', function () {
   t('0.1', '.1');
   t('0.1', '.1');
   t('-0.1', '-.1');
+  t('0.1', '+.1');
   t('1', '1.');
   t('1', '1.0');
   t('-1', '-1.');
+  t('1', '+1.');
   t('-1', '-1.0000');
+  t('1', '1.0000');
   t('1', '1.00000000');
   t('-1', '-1.000000000000000000000000');
+  t('1', '+1.000000000000000000000000');
 
   tx(function () {new Decimal(' 1')}, "' 1'");
   tx(function () {new Decimal('1 ')}, "'1 '");
@@ -235,8 +247,8 @@ T('Decimal', function () {
   tx(function () {new Decimal('1-')}, "'1-'");
   tx(function () {new Decimal(' -1')}, "' -1'");
   tx(function () {new Decimal('-1 ')}, "'-1 '");
-  tx(function () {new Decimal('+1')}, "'+1'");
   tx(function () {new Decimal(' +1')}, "' +1'");
+  tx(function () {new Decimal('+1 ')}, "'+1'");
   tx(function () {new Decimal('.1.')}, "'.1.'");
   tx(function () {new Decimal('+-1')}, "'+-1'");
   tx(function () {new Decimal('-+1')}, "'-+1'");
@@ -262,8 +274,9 @@ T('Decimal', function () {
 
   t('123.456789', 123.456789);
   t('-123.456789', -123.456789);
-  t('123.456789', '123.456789');
   t('-123.456789', '-123.456789');
+  t('123.456789', '123.456789');
+  t('123.456789', '+123.456789');
 
   tx(function () {new Decimal(void 0)}, "void 0");
   tx(function () {new Decimal('undefined')}, "'undefined'");
@@ -282,7 +295,9 @@ T('Decimal', function () {
   tx(function () {new Decimal('ff')}, "'ff'");
   tx(function () {new Decimal('0xg')}, "'oxg'");
   tx(function () {new Decimal('0Xfi')}, "'0Xfi'");
+  tx(function () {new Decimal('++45')}, "'++45'");
   tx(function () {new Decimal('--45')}, "'--45'");
   tx(function () {new Decimal('9.99--')}, "'9.99--'");
+  tx(function () {new Decimal('9.99++')}, "'9.99++'");
   tx(function () {new Decimal('0 0')}, "'0 0'");
 });

test/modules/clamp.js

@@ -0,0 +1,45 @@
+if (typeof T === 'undefined') require('../setup');
+
+T('clamp', function () {
+
+  function t(x, min, max, expected) {
+    //T.assertEqual(expected, new Decimal(x).clampedTo(min, max).valueOf());
+    T.assertEqual(expected, new Decimal(x).clamp(min, max).valueOf());
+    //T.assertEqual(expected, Decimal.clamp(x, min, max).valueOf());
+  }
+
+  t('-0', '0', '0', '-0');
+  t('-0', '-0', '0', '-0');
+  t('-0', '0', '-0', '-0');
+  t('-0', '-0', '-0', '-0');
+  
+  t('0', '0', '0', '0');
+  t('0', '-0', '0', '0');
+  t('0', '0', '-0', '0');
+  t('0', '-0', '-0', '0');
+  
+  t(0, 0, 1, '0');
+  t(-1, 0, 1, '0');
+  t(-2, 0, 1, '0');
+  t(1, 0, 1, '1');
+  t(2, 0, 1, '1');
+  
+  t(1, 1, 1, '1');
+  t(-1, 1, 1, '1');
+  t(-1, -1, 1, '-1');
+  t(2, 1, 2, '2');
+  t(3, 1, 2, '2');
+  t(1, 0, 1, '1');
+  t(2, 0, 1, '1');
+  
+  t(Infinity, 0, 1, '1');
+  t(0, -Infinity, 0, '0');
+  t(-Infinity, 0, 1, '0');
+  t(-Infinity, -Infinity, Infinity, '-Infinity');
+  t(Infinity, -Infinity, Infinity, 'Infinity');
+  t(0, 1, Infinity, '1');
+  
+  t(0, NaN, 1, 'NaN');
+  t(0, 0, NaN, 'NaN');
+  t(NaN, 0, 1, 'NaN');
+});

test/modules/clone.js

@@ -105,5 +105,40 @@ T('clone', function () {
   t(new D8(1).constructor !== new D9(1).constructor);
 
   T.assertException(function () { Decimal.clone(null) }, "Decimal.clone(null)");
+
+  // defaults: true
+
+  Decimal.config({
+    precision: 100,
+    rounding: 2,
+    toExpNeg: -100,
+    toExpPos: 200,
+    defaults: true
+  });
+
+  t(Decimal.precision === 100);
+  t(Decimal.rounding === 2);
+  t(Decimal.toExpNeg === -100);
+  t(Decimal.toExpPos === 200);
+  t(Decimal.defaults === undefined);
+
+  D1 = Decimal.clone({ defaults: true });
+
+  t(D1.precision === 20);
+  t(D1.rounding === 4);
+  t(D1.toExpNeg === -7);
+  t(D1.toExpPos === 21);
+  t(D1.defaults === undefined);
+
+  D2 = Decimal.clone({ defaults: true, rounding: 5 });
+
+  t(D2.precision === 20);
+  t(D2.rounding === 5);
+  t(D2.toExpNeg === -7);
+  t(D2.toExpPos === 21);
+
+  D3 = Decimal.clone({ defaults: false });
+
+  t(D3.rounding === 2);
 });
 

test/modules/config.js

@@ -338,5 +338,36 @@ T('config', function () {
 
   t(9, {modulo: void 0});
 
+  // defaults
+
+  t = function (actual) {
+    T.assert(actual);
+  }
+
+  Decimal.config({
+    precision: 100,
+    rounding: 2,
+    toExpNeg: -100,
+    toExpPos: 200,
+  });
+
+  t(Decimal.precision === 100);
+
+  Decimal.config({ defaults: true });
+
+  t(Decimal.precision === 20);
+  t(Decimal.rounding === 4);
+  t(Decimal.toExpNeg === -7);
+  t(Decimal.toExpPos === 21);
+  t(Decimal.defaults === undefined);
+
+  Decimal.rounding = 3;
+
+  Decimal.config({ precision: 50, defaults: true });
+
+  t(Decimal.precision === 50);
+  t(Decimal.rounding === 4);
+
+  // Decimal.set is an alias for Decimal.config
   T.assertEqual(Decimal.set, Decimal.config);
 });

test/modules/isFiniteEtc.js

@@ -1,6 +1,6 @@
 if (typeof T === 'undefined') require('../setup');
 
-T('isFinite, isInteger, isNaN, isNegative, isZero', function () {
+T('isFinite, isInteger, isNaN, isNegative, isZero, isDecimal', function () {
 
   function t(actual) {
     T.assert(actual);
@@ -257,4 +257,22 @@ T('isFinite, isInteger, isNaN, isNegative, isZero', function () {
   t(!new Decimal('0.999999999999999999999').isInteger());
   t(new Decimal('4e4').isInteger());
   t(new Decimal('-4e4').isInteger());
+
+  // Decimal.isDecimal
+
+  t(Decimal.isDecimal(new Decimal(1)));
+  t(Decimal.isDecimal(new Decimal('-2.3')));
+  t(Decimal.isDecimal(new Decimal(NaN)));
+  t(Decimal.isDecimal(new Decimal('Infinity')));
+
+  t(!Decimal.isDecimal());
+  t(!Decimal.isDecimal(0));
+  t(!Decimal.isDecimal(1));
+  t(!Decimal.isDecimal('-2.3'));
+  t(!Decimal.isDecimal(NaN));
+  t(!Decimal.isDecimal(Infinity));
+  t(!Decimal.isDecimal(undefined));
+  t(!Decimal.isDecimal({}));
+  t(!Decimal.isDecimal({isDecimal: true}));
+  t(!Decimal.isDecimal(new Number(4)));
 });

test/modules/pow.js

@@ -109,6 +109,11 @@ T('pow', function () {
   t('8.97', '-1', '0.111482720178', 12, 3);
   t('61766796871807246.3278075', '-1', '0.00000000000000001618993', 7, 0);
 
+  t('-1', '101', '-1', 100, 1);
+  t('-1', '9999999999999999999999999999999999999999999999999999999999999999999999999', '-1', 100, 1);
+  t('-1', '1e307', '1', 100, 1);
+  t('-1', '1e309', '1', 100, 1);
+  
   Decimal.toExpNeg = Decimal.toExpPos = 0;
 
   t('9.9999999999999', '2220.75', '5.623413251778e+2220', 13, 1);
@@ -126,4 +131,9 @@ T('pow', function () {
   t('908948247.896330216349750387912923575076135766138', '11.38907521122213262858256836', '1.0702278292293091784680297675223031e+102', 35, 3);
   t('4.485925762349120387154391E+47', '1677945.16766265206929939', '8.53959030215133943e+79957194', 18, 5);
   t('2.8448989811706207675566E+89', '2.368592228588521845032068137267440272102614', '7.58940197453762187722508511706932e+211', 33, 5);
+  
+  t('0.9999999999999999', '-1e+30', '1.530863912e+43429448190325', 10, 1);
+  t('0.9999999999999999999999999999999999999999999999999', '-1e+32', '1.00000000000000001000000000000000005e+0', 36, 1);
+  t('0.9999999999999999', '-1e+50', 'Infinity', 40, 1);
+  t('0.9999999999999999999999999999999899999999999999994403269002375809806554775739676251993670310626872684', '-1.49181945463118148622657269735650603014891811120124843379694396257337810020127409048127397077199569e+271', 'Infinity', 100, 1);
 });

test/modules/sum.js

@@ -0,0 +1,64 @@
+if (typeof T === 'undefined') require('../setup');
+
+T('sum', function () {
+  var expected;
+
+  function t() {
+    T.assertEqualDecimal(expected, Decimal.sum.apply(Decimal, arguments));
+  }
+
+  expected = new Decimal(0);
+
+  t('0');
+  t('0', new Decimal(0));
+  t(1, 0, '-1');
+  t(0, new Decimal('-10'), 0, 0, 0, 0, 0, 10);
+  t(11, -11);
+  t(1, '2', new Decimal(3), new Decimal('4'), -10);
+  t(new Decimal(-10), '9', new Decimal(0.01), 0.99);
+  
+  expected = new Decimal(10);
+
+  t('10');
+  t('0', new Decimal('10'));
+  t(10, 0);
+  t(0, 0, 0, 0, 0, 0, 10);
+  t(11, -1);
+  t(1, '2', new Decimal(3), new Decimal('4'));
+  t('9', new Decimal(0.01), 0.99);
+
+  expected = new Decimal(600);
+
+  t(100, 200, 300);
+  t('100', '200', '300');
+  t(new Decimal(100), new Decimal(200), new Decimal(300));
+  t(100, '200', new Decimal(300));
+  t(99.9, 200.05, 300.05);
+
+  expected = new Decimal(NaN);
+
+  t(NaN);
+  t('1', NaN);
+  t(100, 200, NaN);
+  t(NaN, 0, '9', new Decimal(0), 11, Infinity);
+  t(0, new Decimal('-Infinity'), '9', new Decimal(NaN), 11);
+  t(4, '-Infinity', 0, '9', new Decimal(0), Infinity, 2);
+
+  expected = new Decimal(Infinity);
+
+  t(Infinity);
+  t(1, '1e10000000000000000000000000000000000000000', '4');
+  t(100, 200, 'Infinity');
+  t(0, new Decimal('Infinity'), '9', new Decimal(0), 11);
+  t(0, '9', new Decimal(0), 11, Infinity);
+  t(4, new Decimal(Infinity), 0, '9', new Decimal(0), Infinity, 2);
+
+  expected = new Decimal(-Infinity);
+
+  t(-Infinity);
+  t(1, '-1e10000000000000000000000000000000000000000', '4');
+  t(100, 200, '-Infinity');
+  t(0, new Decimal('-Infinity'), '9', new Decimal(0), 11);
+  t(0, '9', new Decimal(0), 11, -Infinity);
+  t(4, new Decimal(-Infinity), 0, '9', new Decimal(0), -Infinity, 2);
+});

test/modules/toNearest.js

@@ -27,8 +27,7 @@ T('toNearest', function () {
   t(!isMinusZero(new Decimal(1).toNearest(-3)));
   t( isMinusZero(new Decimal(-1).toNearest(-3)));
 
-  t = function (expected, n, v, sd, rm) {
-    if (sd) Decimal.precision = sd;
+  t = function (expected, n, v, rm) {
     T.assertEqual(expected, new Decimal(n).toNearest(v, rm).valueOf());
   }
 
@@ -67,9 +66,9 @@ T('toNearest', function () {
 
   t('0', 1, -3);
   t('-0', -1, -3);
-  t('3', 1.5, -3, 20, 0);
-  t('-0', -1.5, -3, 20, 1);
-  t('-3', -1.5, -3, 20, 2);
+  t('3', 1.5, -3, 0);
+  t('-0', -1.5, -3, 1);
+  t('-3', -1.5, -3, 2);
 
   t('123', 123.456);
   t('123', 123.456, 1);
@@ -87,68 +86,145 @@ T('toNearest', function () {
   t('123.46', 123.456, '-0.02');
   t('123.456', 123.456, '-0.002');
 
-  t('83105511540', '83105511539.5', 1, 11, 4);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 11, 4);
-  t('83105511539', '83105511539.5', '1', 11, 5);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 11, 5);
+  t('83105511540', '83105511539.5', 1, 4);
+  t('83105511539', '83105511539.499999999999999999999999999999', 1, 4);
+  t('83105511539', '83105511539.5', '1', 5);
+  t('83105511540', '83105511539.5000000000000000000001', 1, 5);
 
-  t('83105511540', '83105511539.5', new Decimal(1), 3, 4);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 3, 4);
-  t('83105511539', '83105511539.5', new Decimal('1'), 3, 5);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 3, 5);
+  Decimal.precision = 3;
 
-  t('83105511540', '83105511539.5', Decimal.ONE, 30, 4);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 4);
-  t('83105511539', '83105511539.5', 1, 30, 5);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 30, 5);
+  t('83105511540', '83105511539.5', new Decimal(1), 4);
+  t('83105511539', '83105511539.499999999999999999999999999999', 1, 4);
+  t('83105511539', '83105511539.5', new Decimal('1'), 5);
+  t('83105511540', '83105511539.5000000000000000000001', 1, 5);
 
-  t('83105511540', '83105511539.5', -1, 11, 4);
-  t('83105511539', '83105511539.499999999999999999999999999999', -1, 11, 4);
-  t('83105511539', '83105511539.5', '-1', 11, 5);
-  t('83105511540', '83105511539.5000000000000000000001', -1, 11, 5);
+  Decimal.precision = 20;
 
-  t('83105511540', '83105511539.5', new Decimal(-1), 3, 4);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 3, 4);
-  t('83105511539', '83105511539.5', new Decimal('-1'), 3, 5);
-  t('83105511540', '83105511539.5000000000000000000001', -1, 3, 5);
+  t('83105511540', '83105511539.5', -1, 4);
+  t('83105511539', '83105511539.499999999999999999999999999999', -1, 4);
+  t('83105511539', '83105511539.5', '-1', 5);
+  t('83105511540', '83105511539.5000000000000000000001', -1, 5);
 
-  t('83105511540', '83105511539.5', 1, 30, 0);
-  t('83105511539', '83105511539.5', 1, 30, 1);
-  t('83105511540', '83105511539.5', 1, 30, 2);
-  t('83105511539', '83105511539.5', 1, 30, 3);
-  t('83105511540', '83105511539.5', 1, 30, 4);
-  t('83105511539', '83105511539.5', 1, 30, 5);
-  t('83105511540', '83105511539.5', 1, 30, 6);
-  t('83105511540', '83105511539.5', 1, 30, 7);
-  t('83105511539', '83105511539.5', 1, 30, 8);
-  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 0);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 1);
-  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 2);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 3);
-  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 4);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 5);
-  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 6);
-  t('83105511539', '83105511539.499999999999999999999999999999', 1, 30, 7);
-  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 30, 8);
-  t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 0);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 30, 1);
-  t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 2);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 30, 3);
-  t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 4);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 30, 5);
-  t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 6);
-  t('83105511540', '83105511539.5000000000000000000001', 1, 30, 7);
-  t('83105511540', '83105511539.5000000000000000000001', void 0, 30, 8);
+  t('-83105511540', '-83105511539.5', new Decimal(-1), 4);
+  t('-83105511539', '-83105511539.499999999999999999999999999999', 1, 4);
+  t('-83105511539', '-83105511539.5', new Decimal('-1'), 5);
+  t('-83105511540', '-83105511539.5000000000000000000001', -1, 5);
+
+  t('83105511540', '83105511539.5', 1, 0);
+  t('83105511539', '83105511539.5', 1, 1);
+  t('83105511540', '83105511539.5', 1, 2);
+  t('83105511539', '83105511539.5', 1, 3);
+  t('83105511540', '83105511539.5', 1, 4);
+  t('83105511539', '83105511539.5', 1, 5);
+  t('83105511540', '83105511539.5', 1, 6);
+  t('83105511540', '83105511539.5', 1, 7);
+  t('83105511539', '83105511539.5', 1, 8);
+  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 0);
+  t('83105511539', '83105511539.499999999999999999999999999999', 1, 1);
+  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 2);
+  t('83105511539', '83105511539.499999999999999999999999999999', 1, 3);
+  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 4);
+  t('83105511539', '83105511539.499999999999999999999999999999', 1, 5);
+  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 6);
+  t('83105511539', '83105511539.499999999999999999999999999999', 1, 7);
+  t('83105511539', '83105511539.499999999999999999999999999999', void 0, 8);
+  t('83105511540', '83105511539.5000000000000000000001', void 0, 0);
+  t('83105511539', '83105511539.5000000000000000000001', 1, 1);
+  t('83105511540', '83105511539.5000000000000000000001', void 0, 2);
+  t('83105511539', '83105511539.5000000000000000000001', 1, 3);
+  t('83105511540', '83105511539.5000000000000000000001', void 0, 4);
+  t('83105511540', '83105511539.5000000000000000000001', 1, 5);
+  t('83105511540', '83105511539.5000000000000000000001', void 0, 6);
+  t('83105511540', '83105511539.5000000000000000000001', 1, 7);
+  t('83105511540', '83105511539.5000000000000000000001', void 0, 8);
 
   Decimal.rounding = 0;
-  t('83105511540', '83105511539.5', void 0, 11);
+  t('83105511540', '83105511539.5');
 
   Decimal.rounding = 1;
-  t('83105511539', '83105511539.5', void 0, 11);
+  t('83105511539', '83105511539.5');
 
-  t('3847560', '3847561.00000749', 10, 11, 0);
-  t('42840000000000000', '42835000000000001', '1e+13', 2, 0);
-  t('42840000000000000', '42835000000000001', '1e+13', 2, 1);
-  t('42840000000000000', '42835000000000000.0002', '1e+13', 200, 0);
-  t('42840000000000000', '42835000000000000.0002', '1e+13', 200, 1);
+  t('3847570', '3847561.00000749', 10, 0);
+  t('42840000000000000', '42835000000000001', '1e+13', 0);
+  t('42830000000000000', '42835000000000001', '1e+13', 1);
+  t('42840000000000000', '42835000000000000.0002', '1e+13', 0);
+  t('42830000000000000', '42835000000000000.0002', '1e+13', 1);
+
+  t('500', '449.999', 100, 0);
+  t('400', '449.999', 100, 1);
+  t('500', '449.999', 100, 2);
+  t('400', '449.999', 100, 3);
+  t('400', '449.999', 100, 4);
+  t('400', '449.999', 100, 5);
+  t('400', '449.999', 100, 6);
+  t('400', '449.999', 100, 7);
+  t('400', '449.999', 100, 8);
+
+  t('-500', '-449.999', 100, 0);
+  t('-400', '-449.999', 100, 1);
+  t('-400', '-449.999', 100, 2);
+  t('-500', '-449.999', 100, 3);
+  t('-400', '-449.999', 100, 4);
+  t('-400', '-449.999', 100, 5);
+  t('-400', '-449.999', 100, 6);
+  t('-400', '-449.999', 100, 7);
+  t('-400', '-449.999', 100, 8);
+
+  t('500', '450', 100, 0);
+  t('400', '450', 100, 1);
+  t('500', '450', 100, 2);
+  t('400', '450', 100, 3);
+  t('500', '450', 100, 4);
+  t('400', '450', 100, 5);
+  t('400', '450', 100, 6);
+  t('500', '450', 100, 7);
+  t('400', '450', 100, 8);
+
+  t('-500', '-450', 100, 0);
+  t('-400', '-450', 100, 1);
+  t('-400', '-450', 100, 2);
+  t('-500', '-450', 100, 3);
+  t('-500', '-450', 100, 4);
+  t('-400', '-450', 100, 5);
+  t('-400', '-450', 100, 6);
+  t('-400', '-450', 100, 7);
+  t('-500', '-450', 100, 8);
+
+  Decimal.rounding = 0;
+  t('500', '450.001', 100);
+  Decimal.rounding = 1;
+  t('400', '450.001', 100);
+  Decimal.rounding = 2;
+  t('500', '450.001', 100);
+  Decimal.rounding = 3;
+  t('400', '450.001', 100);
+  Decimal.rounding = 4;
+  t('500', '450.001', 100);
+  Decimal.rounding = 5;
+  t('500', '450.001', 100);
+  Decimal.rounding = 6;
+  t('500', '450.001', 100);
+  Decimal.rounding = 7;
+  t('500', '450.001', 100);
+  Decimal.rounding = 8;
+  t('500', '450.001', 100);
+
+  Decimal.rounding = 0;
+  t('-500', '-450.001', 100);
+  Decimal.rounding = 1;
+  t('-400', '-450.001', 100);
+  Decimal.rounding = 2;
+  t('-400', '-450.001', 100);
+  Decimal.rounding = 3;
+  t('-500', '-450.001', 100);
+  Decimal.rounding = 4;
+  t('-500', '-450.001', 100);
+  Decimal.rounding = 5;
+  t('-500', '-450.001', 100);
+  Decimal.rounding = 6;
+  t('-500', '-450.001', 100);
+  Decimal.rounding = 7;
+  t('-500', '-450.001', 100);
+  Decimal.rounding = 8;
+  t('-500', '-450.001', 100);
 });

test/test.html

@@ -28,6 +28,7 @@
     'atanh',
     'cbrt',
     'ceil',
+    'clamp',
     'clone',
     'cmp',
     'config',
@@ -59,6 +60,7 @@
     'sin',
     'sinh',
     'sqrt',
+    'sum',
     'tan',
     'tanh',
     'times',

test/test.js

@@ -15,6 +15,7 @@ console.log('\n Testing decimal.js\n');
   'atanh',
   'cbrt',
   'ceil',
+  'clamp',
   'clone',
   'cmp',
   'config',
@@ -46,6 +47,7 @@ console.log('\n Testing decimal.js\n');
   'sin',
   'sinh',
   'sqrt',
+  'sum',
   'tan',
   'tanh',
   'times',