typia/lib/internal/_decimal.js

Superfast runtime validators with only one line

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports._decimalGcd = exports._decimalPower = exports._decimalToNumber = exports._decimalIntegerStep = exports._decimalDivide = exports._decimalDecompose = void 0;
const _decimalDecompose = (value) => {
    if (Number.isFinite(value) === false)
        return null;
    const [mantissa = "0", exponentText = "0"] = value.toString().split("e");
    const negative = mantissa.startsWith("-");
    const unsigned = negative ? mantissa.slice(1) : mantissa;
    const point = unsigned.indexOf(".");
    const decimals = point === -1 ? 0 : unsigned.length - point - 1;
    const digits = BigInt(unsigned.replace(".", ""));
    return {
        coefficient: negative ? -digits : digits,
        exponent: Number(exponentText) - decimals,
    };
};
exports._decimalDecompose = _decimalDecompose;
const _decimalDivide = (value, divisor) => {
    const dividend = (0, exports._decimalDecompose)(value);
    if (dividend === null || divisor.coefficient === BigInt(0))
        return null;
    const exponent = dividend.exponent - divisor.exponent;
    return exponent >= 0
        ? {
            numerator: dividend.coefficient * (0, exports._decimalPower)(exponent),
            denominator: divisor.coefficient,
        }
        : {
            numerator: dividend.coefficient,
            denominator: divisor.coefficient * (0, exports._decimalPower)(-exponent),
        };
};
exports._decimalDivide = _decimalDivide;
const _decimalIntegerStep = (value) => {
    const decimal = (0, exports._decimalDecompose)(value);
    if (decimal === null || decimal.coefficient <= BigInt(0))
        return null;
    if (decimal.exponent >= 0)
        return {
            coefficient: decimal.coefficient * (0, exports._decimalPower)(decimal.exponent),
            exponent: 0,
        };
    const denominator = (0, exports._decimalPower)(-decimal.exponent);
    return {
        coefficient: decimal.coefficient / (0, exports._decimalGcd)(decimal.coefficient, denominator),
        exponent: 0,
    };
};
exports._decimalIntegerStep = _decimalIntegerStep;
const _decimalToNumber = (value) => Number(`${value.coefficient}e${value.exponent}`);
exports._decimalToNumber = _decimalToNumber;
const _decimalPower = (exponent) => BigInt(10) ** BigInt(exponent);
exports._decimalPower = _decimalPower;
const _decimalGcd = (x, y) => {
    while (y !== BigInt(0))
        [x, y] = [y, x % y];
    return x < BigInt(0) ? -x : x;
};
exports._decimalGcd = _decimalGcd;
//# sourceMappingURL=_decimal.js.map