Method floor

packages/bigdecimal/index.ts:408–430

()

  }

  floor(): BigDecimal {
    if (this._special !== SpecialValue.NONE) return this
    if (this._mantissa === 0n) return this
    if (this._exponent >= 0) return this // already an integer

    const divisor = bigintPow10(-this._exponent)
    const m = this._mantissa
    let q = m / divisor

    // Floor: round toward -infinity
    // For negative numbers with remainder, subtract 1
    if (m < 0n && m % divisor !== 0n) {
      q -= 1n
    }

    if (q === 0n) {
      // Check if we should return -0
      const negZero = this._mantissa < 0n
      return BigDecimal._create(0n, 0, SpecialValue.NONE, negZero)
    }
    const [nm, ne] = removeTrailingZeros(q, 0)
    return BigDecimal._create(nm, ne, SpecialValue.NONE, false)
  }

  ceil(): BigDecimal {
    if (this._special !== SpecialValue.NONE) return this