FileStream.md

File Input Stream

FileInputStream is used for reading data from a file. It can be added to a ciphers chain

let inputFileStream = FileInputStream(with: try! FileHandle(forReadingFrom: originalFileURL))
try inputFileStream.open()

guard let inputFileStream = FileInputStream(with: originalFileURL) else {
  // file not exist
  return
}
try inputFileStream.open()

let tmpBufferLen = 1<<16 // 65KB buffer
var tmpBuffer = Array<UInt8>(repeating: 0, count: tmpBufferLen)
while inputFileStream.hasBytesAvailable {
  let readLen = inputFileStream.read(&tmpBuffer, maxLength: tmpBufferLen)
  try compressingStream.write(tmpBuffer, length: readLen)
}