Int32 Keyboard::read()

in atari_py/ale_interface/src/emucore/Keyboard.cxx [79:183]

• 102 lines of code
• 36 McCabe index (conditional complexity)

Int32 Keyboard::read(AnalogPin pin)
{
  // NOTE: maximumResistance = GND, while minimumResistance = +5V

  if(pin == Nine)
  {
    if(myJack == Left)
    {
      if(!(myPinState & 0x01) && (myEvent.get(Event::KeyboardZero1) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x02) && (myEvent.get(Event::KeyboardZero4) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x04) && (myEvent.get(Event::KeyboardZero7) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x08) && (myEvent.get(Event::KeyboardZeroStar) != 0))
      {
        return maximumResistance;
      }
      else
      {
        return minimumResistance;
      }
    }
    else
    {
      if(!(myPinState & 0x01) && (myEvent.get(Event::KeyboardOne1) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x02) && (myEvent.get(Event::KeyboardOne4) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x04) && (myEvent.get(Event::KeyboardOne7) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x08) && (myEvent.get(Event::KeyboardOneStar) != 0))
      {
        return maximumResistance;
      }
      else
      {
        return minimumResistance;
      }
    }
  }
  else
  {
    if(myJack == Left)
    {
      if(!(myPinState & 0x01) && (myEvent.get(Event::KeyboardZero2) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x02) && (myEvent.get(Event::KeyboardZero5) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x04) && (myEvent.get(Event::KeyboardZero8) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x08) && (myEvent.get(Event::KeyboardZero0) != 0))
      {
        return maximumResistance;
      }
      else
      {
        return minimumResistance;
      }
    }
    else
    {
      if(!(myPinState & 0x01) && (myEvent.get(Event::KeyboardOne2) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x02) && (myEvent.get(Event::KeyboardOne5) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x04) && (myEvent.get(Event::KeyboardOne8) != 0))
      {
        return maximumResistance; 
      }
      else if(!(myPinState & 0x08) && (myEvent.get(Event::KeyboardOne0) != 0))
      {
        return maximumResistance;
      }
      else
      {
        return minimumResistance;
      }
    }
  }

  return minimumResistance;
}