mirror of
https://github.com/josdejong/mathjs.git
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82 lines
3.3 KiB
JavaScript
82 lines
3.3 KiB
JavaScript
'use strict'
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const object = require('./utils/object')
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const 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', 'Error: Constant uninitialized is removed since v4.0.0. Use null instead')
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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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} 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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if (type.Complex) {
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setConstant(math, 'i', type.Complex.I)
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}
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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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