import Foundation
import CoreFoundation
func parseFrom(_ stream: InputStream) -> Bool {
   let _chunkSize = 512
   guard let buffer = malloc(_chunkSize)?.bindMemory(to: UInt8.self, capacity: _chunkSize) else { return false }
   defer { free(buffer) }

   stream.open()
   defer { stream.close() }

   switch stream.read(buffer, maxLength: _chunkSize) {
   case let len where len > 0:
      print("Result was > 0")
   case ..<0:
      print("Result was < 0")
   case 0:
      print("Result was = 0")
   }

   return true
}