@yaffle/bigdecimal - npm Package Compare versions

Comparing version 1.0.25 to 1.0.26

BigDecimal.js

		@@ -33,3 +33,2 @@ /jslint bigint: true, vars: true, indent: 2/
		// BigDecimal.sqrt(a, rounding)
		// BigDecimal.cbrt(a, rounding)
		// "simple" Math functions:
		@@ -701,3 +700,3 @@ // BigDecimal.abs(a)
		const internalRounding = {
		maximumSignificantDigits: Math.ceil(Math.max(rounding.maximumSignificantDigits \|\| (rounding.maximumFractionDigits + 1 + getExpectedResultIntegerDigits(x) - 1), significandDigits(x)) * Math.cbrt(2**(i - 1))) + 2 + (BASE === 2 ? 1 : 0),
		maximumSignificantDigits: Math.ceil(Math.max(rounding.maximumSignificantDigits \|\| (rounding.maximumFractionDigits + 1 + getExpectedResultIntegerDigits(x) - 1), significandDigits(x)) * Math.pow(2, Math.ceil((i - 1) / 3))) + 2 + (BASE === 2 ? 1 : 0),
		roundingMode: "half-even"
		@@ -914,10 +913,5 @@ };

		function nthRoot(x, n, rounding) {
		const exponentiateX = function (x, n) {
		return n === 1 ? x : (n % 2 === 0 ? exponentiateX(BigDecimal.multiply(x, x), n / 2) : BigDecimal.multiply(x, exponentiate(x, n - 1)));
		};
		BigDecimal.sqrt = function (x, rounding) {
		if (BigDecimal.lessThan(x, BigDecimal.BigDecimal(0))) {
		if (n % 2 === 0) {
		throw new RangeError();
		}
		throw new RangeError();
		}
		@@ -928,15 +922,15 @@ if (BigDecimal.equal(x, BigDecimal.BigDecimal(0))) {
		// https://en.wikipedia.org/wiki/Nth_root#Using_Newton's_method
		const e = getCountOfDigits(x) / BigInt(n);
		const e = getCountOfDigits(x) / 2n;
		const t = exponentiate(BASE, e);
		const y = BigDecimal.multiply(x, exponentiate(BASE, -(BigInt(n) * e)));
		const y = BigDecimal.multiply(x, exponentiate(BASE, -(2n * e)));
		const k = Math.floor(Math.log2(Number.MAX_SAFE_INTEGER + 1) / Math.log2(BASE)) - 1;
		const xn = BigDecimal.toNumber(BigDecimal.round(BigDecimal.multiply(y, exponentiate(BASE, k)), {maximumFractionDigits: 0, roundingMode: "half-even"})) / BASE**k;
		const r = n === 2 ? Math.sqrt(xn) : (n === 3 ? Math.cbrt(xn) : Math.exp(Math.log(xn) / n));
		const resultSignificantDigits = 8 * (rounding.maximumSignificantDigits \|\| (rounding.maximumFractionDigits + Math.ceil(significandDigits(x) / n)) \|\| 1);
		const r = Math.sqrt(xn);
		//TODO: fix
		const resultSignificantDigits = 2 * (rounding.maximumSignificantDigits \|\| (rounding.maximumFractionDigits + Math.ceil(significandDigits(x) / 2)) \|\| 1);
		let result = BigDecimal.multiply(BigDecimal.BigDecimal(Math.sign(r) * Math.floor(Math.abs(r) * BASE**k + 0.5)), exponentiate(BASE, -k));
		const iteration = function (result, rounding) {
		const resultInNm1 = exponentiateX(result, n - 1);
		return BigDecimal.divide(BigDecimal.add(y, BigDecimal.multiply(BigDecimal.BigDecimal(n - 1), BigDecimal.multiply(result, resultInNm1))), BigDecimal.multiply(BigDecimal.BigDecimal(n), resultInNm1), rounding);
		const iteration = function (result, internalRounding) {
		return BigDecimal.divide(BigDecimal.add(y, BigDecimal.multiply(result, result)), BigDecimal.multiply(BigDecimal.BigDecimal(2), result), internalRounding);
		};
		for (let i = Math.max(k - (n - 1), 1); i < resultSignificantDigits; i *= 2) {
		for (let i = Math.max(k - 1, 1); i <= resultSignificantDigits; i *= 2) {
		const internalRounding = {maximumSignificantDigits: i, roundingMode: "half-even"};
		@@ -947,12 +941,4 @@ result = iteration(result, internalRounding);
		return BigDecimal.multiply(result, t);
		}

		BigDecimal.sqrt = function (x, rounding) {
		return nthRoot(x, 2, rounding);
		};

		BigDecimal.cbrt = function (x, rounding) {
		return nthRoot(x, 3, rounding);
		};

		return BigDecimal;
		@@ -959,0 +945,0 @@ };

package.json

		{
		"name": "@yaffle/bigdecimal",
		"version": "1.0.25",
		"version": "1.0.26",
		"description": "Arbitrary precision decimal arithmetic library. Polyfill for decimal proposal. Implemented on the top of BigInt.",
		@@ -5,0 +5,0 @@ "main": "BigDecimal.js",

README.md

		@@ -53,3 +53,2 @@ # BigDecimal
		BigDecimal.sqrt(a, rounding)
		BigDecimal.cbrt(a, rounding)

		@@ -56,0 +55,0 @@ The `rounding` argument may look like `{maximumFractionDigits: 10, roundingMode: "half-even"}` or `{maximumSignificantDigits: 10, roundingMode: "half-even"}`,

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