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Integer literal '255' overflows when stored into 'Int8'

I have the following code and i get the following error. Integer literal '255' overflows when stored into 'Int8'

func decodeIDArrayItem(index:Int, tokenArray:UnsafeMutablePointer<CChar>){

    var value = tokenArray[index * 4] & 0xFF
    value <<= 8;
    value |= tokenArray [index * 4 + 1] & 0xFF
    value <<= 8;
    value |= tokenArray [index * 4 + 2] & 0xFF
    value <<= 8;
    value |= tokenArray [index * 4 + 3] & 0xFF

}

Any thoughts?

Solution 
  • func decodeIDArrayItem(index:Int, tokenArray:UnsafeMutablePointer<CChar>) -> UInt32{

    var value:UInt32 = UInt32(tokenArray[index * 4]) & 0xFF

    value <<= 8
    value |= UInt32(tokenArray [index * 4 + 1]) & 0xFF
    value <<= 8
    value |= UInt32(tokenArray [index * 4 + 2]) & 0xFF
    value <<= 8
    value |= UInt32(tokenArray [index * 4 + 3]) & 0xFF


    return value

}