Method #continueDecodeDoubleInteger

packages/client/lib/RESP/decoder.ts:372–403

(isNegative, integer, chunk)

  }

  #continueDecodeDoubleInteger(isNegative, integer, chunk) {
    let cursor = this.#cursor;
    do {
      const byte = chunk[cursor];
      switch (byte) {
        case ASCII['.']:
          this.#cursor = cursor + 1; // skip .
          return this.#cursor < chunk.length ?
            this.#decodeDoubleDecimal(isNegative, 0, integer, chunk) :
            this.#decodeDoubleDecimal.bind(this, isNegative, 0, integer);

        case ASCII.E:
        case ASCII.e: {
          this.#cursor = cursor + 1; // skip E/e
          const i = isNegative ? -integer : integer;
          return this.#cursor < chunk.length ?
            this.#decodeDoubleExponent(i, chunk) :
            this.#decodeDoubleExponent.bind(this, i);
        }

        case ASCII['\r']:
          this.#cursor = cursor + 2; // skip \r\n
          return isNegative ? -integer : integer;

        default:
          integer = integer * 10 + byte - ASCII['0'];
      }
    } while (++cursor < chunk.length);

    this.#cursor = cursor;
    return this.#continueDecodeDoubleInteger.bind(this, isNegative, integer);
  }

  // Precalculated multipliers for decimal points to improve performance
  // "... about 15 to 17 decimal places ..."