@techmely/utils/numberPlusPrecision.js

Collection of helpful JavaScript / TypeScript utils

/*!
 * @techmely/utils
 * Copyright(c) 2021-2024 Techmely <techmely.creation@gmail.com>
 * MIT Licensed
 */

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/numberPlusPrecision.ts
var numberPlusPrecision_exports = {};
__export(numberPlusPrecision_exports, {
  plusPrecision: () => plusPrecision
});
module.exports = __toCommonJS(numberPlusPrecision_exports);

// src/numberCreateOperationPrecision.ts
function createOperationPrecision(operation) {
  return (...nums) => {
    const [first, ...others] = nums;
    return others.reduce((prev, next) => operation(prev, next), first);
  };
}

// src/numberDigitLengthPrecision.ts
function digitLengthPrecision(num) {
  const eSplit = num.toString().split(/[eE]/);
  const len = (eSplit[0].split(".")[1] || "").length - +(eSplit[1] || 0);
  return len > 0 ? len : 0;
}

// src/numberBoundaryStatePrecision.ts
var _boundaryCheckingState = true;
function checkBoundaryPrecision(num) {
  if (_boundaryCheckingState) {
    if (num > Number.MAX_SAFE_INTEGER || num < Number.MIN_SAFE_INTEGER) {
      console.warn(
        `${num} is beyond boundary when transfer to integer, the results may not be accurate`
      );
    }
  }
}

// src/numberStripPrecision.ts
function stripPrecision(num, precision = 15) {
  return +parseFloat(Number(num).toPrecision(precision));
}

// src/numberFloat2FixedPrecision.ts
function float2FixedPrecision(num) {
  if (num.toString().indexOf("e") === -1) {
    return Number(num.toString().replace(".", ""));
  }
  const dLen = digitLengthPrecision(num);
  const powDLen = 10 ** dLen;
  return dLen > 0 ? stripPrecision(Number(num) * powDLen) : Number(num);
}

// src/numberTimesPrecision.ts
var timesPrecision = createOperationPrecision((num1, num2) => {
  const num1Changed = float2FixedPrecision(num1);
  const num2Changed = float2FixedPrecision(num2);
  const baseNum = digitLengthPrecision(num1) + digitLengthPrecision(num2);
  const leftValue = num1Changed * num2Changed;
  checkBoundaryPrecision(leftValue);
  const baseNumPow = 10 ** baseNum;
  return leftValue / baseNumPow;
});

// src/numberPlusPrecision.ts
var plusPrecision = createOperationPrecision((num1, num2) => {
  const baseNum = 10 ** Math.max(digitLengthPrecision(num1), digitLengthPrecision(num2));
  return (timesPrecision(num1, baseNum) + timesPrecision(num2, baseNum)) / baseNum;
});
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  plusPrecision
});