29 lines
1.1 KiB
TypeScript
29 lines
1.1 KiB
TypeScript
import { Config } from '../core/Config.js'
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import type { Complex } from '../Complex/type.js'
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export const add = (a: number, b: number): number => a + b
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export const addReal = add
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export const unaryMinus = (a: number): number => -a
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export const conj = (a: number): number => a
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export const subtract = (a: number, b: number): number => a - b
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export const multiply = (a: number, b: number): number => a * b
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export const absquare = (a: number): number => a * a
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export const reciprocal = (a: number): number => 1 / a
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export const divide = (a: number, b: number): number => a / b
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export const divideByReal = divide
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export const conservativeSqrt = (a: number): number => isNaN(a) ? NaN : Math.sqrt(a)
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export const sqrt =
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(dep: {
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config: Config,
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complex: (re: number, im: number) => Complex<number>
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}): (a: number) => number | Complex<number> => {
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if (dep.config.predictable || !dep.complex) return conservativeSqrt
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return a => {
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if (isNaN(a)) return NaN
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if (a >= 0) return Math.sqrt(a)
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return dep.complex(0, Math.sqrt(unaryMinus(a)))
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}
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}
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