1import { SheetColumnRowKey } from "../../models/common/SheetColumnRowKey";
 2import { Complex } from "../../models/common/Types";
 3import { Converters } from "../../utils/Converters";
 4import { AbstractFormula } from "../AbstractFormula";
 5import { FormulaName } from "../FormulaName";
 6
 7export class EVEN extends AbstractFormula {
 8  static SELF: EVEN = new EVEN();
 9  NAME = FormulaName.EVEN;
10
11  internal(origin: SheetColumnRowKey, ...values: Array<Complex>) {
12    AbstractFormula.checkLength(values.length, 1, this.NAME);
13    const value = Converters.toNumber(Converters.first(this.collateralLookup(origin, values[0])));
14    let rounded;
15    if (value < 0) {
16      rounded = Math.floor(value);
17      if (rounded % 2 != 0) {
18        return rounded - 1.0;
19      }
20    } else {
21      rounded = Math.ceil(value);
22      if (rounded % 2 != 0) {
23        return rounded + 1.0;
24      }
25    }
26    return rounded;
27  }
28}