private static int getChannelFromFrequency()

in packages/@fbcmobile-signalscan/android/src/main/java/com/fbc/signalscan/WiFiScanResultsModule.java [172:192]

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

  private static int getChannelFromFrequency(int frequency) {
    // Hardcode channel 14 to 2482 which is designated for Japan
    if (frequency == HIGH_2_DOT_4GHZ) {
      return 14;
    }

    // Frequencies between 2412MHz and 2484MHz are in the 2.4GHz range.  The
    // starting freqency in that range is 2412 so we use that to calculate
    // the channel which has 5MHz width.
    if (frequency < HIGH_2_DOT_4GHZ) {
      return (frequency - LOW_2_DOT_4GHZ) / 5 + 1;
    }

    // Frequencies in the 5GHz range
    if (frequency > LOW_5GHZ && frequency < HIGH_5GHZ) {
      return frequency / 5 - 1000;
    }

    // Outside the 2.4GHz and 5GHz range we'll just return zero for the channel
    return 0;
  }