public static void Serialize(Stream stream, PiaFile piaFile)
{
if (stream == null)
throw new ArgumentNullException("Stream");
if (piaFile == null)
throw new ArgumentNullException("PiaFile");
try
{
// Header
var headerString = piaFile.Header.ToString();
var headerBytes = Encoding.Default.GetBytes(headerString);
stream.Write(headerBytes, 0, headerBytes.Length);
// Nodes
var nodeString = _serializeNode(piaFile);
var nodeBytes = Encoding.Default.GetBytes(nodeString);
// Deflation
byte[] deflatedBytes;
var deflater = new Deflater(Deflater.DEFAULT_COMPRESSION);
using (var ms = new MemoryStream())
{
var deflateStream = new DeflaterOutputStream(ms, deflater);
deflateStream.Write(nodeBytes, 0, nodeBytes.Length);
deflateStream.Finish();
deflatedBytes = ms.ToArray();
}
// Checksum
var checkSum = new byte[12];
BitConverter.GetBytes(deflater.Adler).CopyTo(checkSum, 0); // Adler
BitConverter.GetBytes(nodeBytes.Length).CopyTo(checkSum, 4); // InflatedSize
BitConverter.GetBytes(deflatedBytes.Length).CopyTo(checkSum, 8); // DeflatedSize
stream.Write(checkSum, 0, checkSum.Length);
// Final write
stream.Write(deflatedBytes, 0, deflatedBytes.Length);
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// Creates a new DeflaterOutputStream with the given Deflater and
/// default buffer size.
/// </summary>
/// <param name="baseOutputStream">
/// the output stream where deflated output should be written.
/// </param>
/// <param name="deflater">
/// the underlying deflater.
/// </param>
public DeflaterOutputStream(Stream baseOutputStream, Deflater deflater)
: this(baseOutputStream, deflater, 512)
{
}
/// <summary>
/// Creates a new DeflaterOutputStream with the given Deflater and
/// buffer size.
/// </summary>
/// <param name="baseOutputStream">
/// The output stream where deflated output is written.
/// </param>
/// <param name="deflater">
/// The underlying deflater to use
/// </param>
/// <param name="bufferSize">
/// The buffer size in bytes to use when deflating (minimum value 512)
/// </param>
/// <exception cref="ArgumentOutOfRangeException">
/// bufsize is less than or equal to zero.
/// </exception>
/// <exception cref="ArgumentException">
/// baseOutputStream does not support writing
/// </exception>
/// <exception cref="ArgumentNullException">
/// deflater instance is null
/// </exception>
public DeflaterOutputStream(Stream baseOutputStream, Deflater deflater, int bufferSize)
{
if ( baseOutputStream == null ) {
throw new ArgumentNullException("baseOutputStream");
}
if (baseOutputStream.CanWrite == false) {
throw new ArgumentException("Must support writing", "baseOutputStream");
}
if (deflater == null) {
throw new ArgumentNullException("deflater");
}
if (bufferSize < 512) {
throw new ArgumentOutOfRangeException("bufferSize");
}
baseOutputStream_ = baseOutputStream;
buffer_ = new byte[bufferSize];
deflater_ = deflater;
}
