function decodeValue()

in backend/columnar.js [300:329]

• 30 lines of code
• 12 McCabe index (conditional complexity)

function decodeValue(sizeTag, bytes) {
  if (sizeTag === VALUE_TYPE.NULL) {
    return {value: null}
  } else if (sizeTag === VALUE_TYPE.FALSE) {
    return {value: false}
  } else if (sizeTag === VALUE_TYPE.TRUE) {
    return {value: true}
  } else if (sizeTag % 16 === VALUE_TYPE.UTF8) {
    return {value: utf8ToString(bytes)}
  } else {
    if (sizeTag % 16 === VALUE_TYPE.LEB128_UINT) {
      return {value: new Decoder(bytes).readUint53(), datatype: "uint"}
    } else if (sizeTag % 16 === VALUE_TYPE.LEB128_INT) {
      return {value: new Decoder(bytes).readInt53(), datatype: "int"}
    } else if (sizeTag % 16 === VALUE_TYPE.IEEE754) {
      const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength)
      if (bytes.byteLength === 8) {
        return {value: view.getFloat64(0, true), datatype: "float64"}
      } else {
        throw new RangeError(`Invalid length for floating point number: ${bytes.byteLength}`)
      }
    } else if (sizeTag % 16 === VALUE_TYPE.COUNTER) {
      return {value: new Decoder(bytes).readInt53(), datatype: 'counter'}
    } else if (sizeTag % 16 === VALUE_TYPE.TIMESTAMP) {
      return {value: new Decoder(bytes).readInt53(), datatype: 'timestamp'}
    } else {
      return {value: bytes, datatype: sizeTag % 16}
    }
  }
}