@bignum/core - npm Package Compare versions

Comparing version 0.5.0 to 0.6.0

lib/index.d.ts

@@ -35,2 +35,3 @@ type OverflowContext = {
     add(augend: Num | Inf): Num | Inf;
+    subtract(subtrahend: Num): Num;
     subtract(subtrahend: Num | Inf): Num | Inf;
@@ -43,6 +44,8 @@ multiply(multiplicand: Num): Num;
     modulo(divisor: Num | Inf): Num | Inf | null;
+    pow(n: Num, options?: PowOptions): Num | null;
     pow(n: Num | Inf, options?: PowOptions): Num | Inf | null;
     scaleByPowerOfTen(n: Num | Inf): Num | Inf | null;
     sqrt(options?: SqrtOptions): Num;
-    nthRoot(n: Num | Inf, options?: SqrtOptions): Num | Inf | null;
+    nthRoot(n: Num, options?: NthRootOptions): Num;
+    nthRoot(n: Num | Inf, options?: NthRootOptions): Num | Inf | null;
     trunc(): Num;
@@ -49,0 +52,0 @@ round(): Num;

lib/index.js

@@ -54,2 +54,8 @@ // src/nth-root-utils.mts
 }
+function getDivForPowOptions(options = {}) {
+  return {
+    overflow: (ctx) => ctx.scale > 0n && ctx.precision > 20n,
+    ...options
+  };
+}
 var Num = class _Num {
@@ -167,10 +173,18 @@ constructor(intValue, exponent) {
     }
-    const bn = n.toBigInt();
-    if (bn >= 0n)
-      return new _Num(this.i ** bn, this.e * bn);
-    const divideOptions = {
-      overflow: (ctx) => ctx.scale > 0n && ctx.precision > 20n,
-      ...options
-    };
-    return ONE.divide(new _Num(this.i ** -bn, this.e * -bn), divideOptions);
+    const bn = abs(n.#trunc());
+    let a = new _Num(this.i ** bn, this.e * bn);
+    if (n.#scale()) {
+      if (this.i < 0n)
+        return null;
+      const decimal = n.subtract(n.trunc());
+      const [nI, nD] = reduceFractions(abs(decimal.i), decimal.d);
+      a = a.multiply(
+        this.nthRoot(new _Num(nD, 0n), getDivForPowOptions(options)).pow(
+          new _Num(nI, 0n)
+        )
+      );
+    }
+    if (n.i >= 0n)
+      return a;
+    return ONE.divide(a, getDivForPowOptions(options));
   }
@@ -180,4 +194,7 @@ scaleByPowerOfTen(n) {
       return n.signum() < 0 ? ZERO : !this.i ? null : this.i >= 0n ? INF : N_INF;
-    const bn = n.toBigInt();
-    return new _Num(this.i, this.e + bn);
+    if (!n.#scale()) {
+      const bn = n.#trunc();
+      return new _Num(this.i, this.e + bn);
+    }
+    return this.multiply(new _Num(10n, 0n).pow(n));
   }
@@ -236,8 +253,8 @@ sqrt(options) {
       return this.pow(n);
-    if (!this.i)
+    if (!n.i)
       return this.pow(INF);
-    if (n.i < 0n || this.i < 0n)
+    if (this.i < 0n)
       throw new Error("Negative number");
     const overflow = parseOFOption(options, this.#scale());
-    const iN = n.toBigInt();
+    const iN = n.abs().toBigInt();
     const powOfTen = 10n ** iN;
@@ -281,3 +298,6 @@ const decimalLength = this.#scale();
     }
-    return new _Num(digits, exponent);
+    const a = new _Num(digits, exponent);
+    if (n.i >= 0n)
+      return a;
+    return ONE.divide(a, getDivForPowOptions(options));
   }
@@ -394,2 +414,9 @@ trunc() {
 }
+function reduceFractions(n, d) {
+  const g = gcd(n, d);
+  return [n / g, d / g];
+  function gcd(a, b) {
+    return b ? gcd(b, a % b) : a;
+  }
+}
 
@@ -396,0 +423,0 @@ // src/inf.mts

package.json

 {
   "name": "@bignum/core",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "description": "Arbitrary-precision decimal arithmetic with BigInt.",
@@ -5,0 +5,0 @@ "type": "module",

README.md

@@ -81,4 +81,2 @@ # @bignum/core
 
-If `n` is given a non-integer value, an error will be raised.
-
 An object can be given as an option. It's the same option for `divide()`. This is used in negative pows.
@@ -107,4 +105,2 @@
 
-If `n` is given a non-integer value, an error will be raised.
-
 ### BigNum.prototype.sqrt([options]): BigNum
@@ -122,3 +118,3 @@
 
-If this BigNum or `n` are negative value, an error will be raised.\
+If this BigNum is a negative value, an error will be raised.\
 If `n` is given a non-integer value, an error will be raised.
@@ -125,0 +121,0 @@

No alert changes

Improved metrics

Total package byte prevSize

52596

increased by2.88%

Lines of code

1459

increased by4.07%

Worsened metrics

Number of lines in readme file

166

decreased by-2.35%

No dependency changes