mirror of
https://github.com/josdejong/mathjs.git
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80 lines
3.4 KiB
JavaScript
80 lines
3.4 KiB
JavaScript
'use strict';
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var object = require('./utils/object');
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var bigConstants = require('./utils/bignumber/constants');
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function factory (type, config, load, typed, math) {
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// listen for changed in the configuration, automatically reload
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// constants when needed
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math.on('config', function (curr, prev) {
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if (curr.number !== prev.number) {
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factory(type, config, load, typed, math);
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}
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});
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setConstant(math, 'true', true);
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setConstant(math, 'false', false);
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setConstant(math, 'null', null);
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setConstant(math, 'uninitialized', require('./utils/array').UNINITIALIZED);
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if (config.number === 'BigNumber') {
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setConstant(math, 'Infinity', new type.BigNumber(Infinity));
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setConstant(math, 'NaN', new type.BigNumber(NaN));
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setLazyConstant(math, 'pi', function () {return bigConstants.pi(type.BigNumber)});
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setLazyConstant(math, 'tau', function () {return bigConstants.tau(type.BigNumber)});
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setLazyConstant(math, 'e', function () {return bigConstants.e(type.BigNumber)});
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setLazyConstant(math, 'phi', function () {return bigConstants.phi(type.BigNumber)}); // golden ratio, (1+sqrt(5))/2
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// uppercase constants (for compatibility with built-in Math)
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setLazyConstant(math, 'E', function () {return math.e;});
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setLazyConstant(math, 'LN2', function () {return new type.BigNumber(2).ln();});
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setLazyConstant(math, 'LN10', function () {return new type.BigNumber(10).ln()});
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setLazyConstant(math, 'LOG2E', function () {return new type.BigNumber(1).div(new type.BigNumber(2).ln());});
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setLazyConstant(math, 'LOG10E', function () {return new type.BigNumber(1).div(new type.BigNumber(10).ln())});
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setLazyConstant(math, 'PI', function () {return math.pi});
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setLazyConstant(math, 'SQRT1_2', function () {return new type.BigNumber('0.5').sqrt()});
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setLazyConstant(math, 'SQRT2', function () {return new type.BigNumber(2).sqrt()});
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}
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else {
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setConstant(math, 'Infinity', Infinity);
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setConstant(math, 'NaN', NaN);
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setConstant(math, 'pi', Math.PI);
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setConstant(math, 'tau', Math.PI * 2);
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setConstant(math, 'e', Math.E);
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setConstant(math, 'phi', 1.61803398874989484820458683436563811772030917980576286213545); // golden ratio, (1+sqrt(5))/2
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// uppercase constants (for compatibility with built-in Math)
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setConstant(math, 'E', math.e);
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setConstant(math, 'LN2', Math.LN2);
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setConstant(math, 'LN10', Math.LN10);
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setConstant(math, 'LOG2E', Math.LOG2E);
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setConstant(math, 'LOG10E', Math.LOG10E);
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setConstant(math, 'PI', math.pi);
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setConstant(math, 'SQRT1_2', Math.SQRT1_2);
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setConstant(math, 'SQRT2', Math.SQRT2);
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}
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// complex i
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setConstant(math, 'i', type.Complex.I);
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// meta information
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setConstant(math, 'version', require('./version'));
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}
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// create a constant in both math and mathWithTransform
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function setConstant(math, name, value) {
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math[name] = value;
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math.expression.mathWithTransform[name] = value;
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}
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// create a lazy constant in both math and mathWithTransform
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function setLazyConstant (math, name, resolver) {
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object.lazy(math, name, resolver);
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object.lazy(math.expression.mathWithTransform, name, resolver);
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}
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exports.factory = factory;
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exports.lazy = false; // no lazy loading of constants, the constants themselves are lazy when needed
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exports.math = true; // request access to the math namespace
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