typocomath/src/numbers/arithmetic.ts

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import type {configDependency} from '../core/Config.js'
import type {Dependencies, Signature} from '../interfaces/type.js'
export const add: Signature<'add', number> = (a, b) => a + b
export const unaryMinus: Signature<'unaryMinus', number> = a => -a
export const conj: Signature<'conj', number> = a => a
export const subtract: Signature<'subtract', number> = (a, b) => a - b
export const multiply: Signature<'multiply', number> = (a, b) => a * b
export const absquare: Signature<'absquare', number> = a => a * a
export const reciprocal: Signature<'reciprocal', number> = a => 1 / a
export const divide: Signature<'divide', number> = (a, b) => a / b
const basicSqrt = a => isNaN(a) ? NaN : Math.sqrt(a)
export const conservativeSqrt: Signature<'conservativeSqrt', number> = basicSqrt
export const sqrt =
(dep: configDependency & Dependencies<'complex', number>):
Signature<'sqrt', number> => {
if (dep.config.predictable || !dep.complex) return basicSqrt
return a => {
if (isNaN(a)) return NaN
if (a >= 0) return Math.sqrt(a)
return dep.complex(0, Math.sqrt(unaryMinus(a)))
}
}