protected override void _Unir(string fichero, string dirDest)
{
SplitterMergerInfo info = SplitterMergerInfo.GetInfoFromFile (fichero);
if (info != null)
{
if (info.Compression == SplitterMergerCompression.V3_COMPRESSION)
{
throw new FormatNotSupportedException ("Compression in Splitter&Merger 3.0 is not supported");
}
Stream fos = UtilidadesFicheros.CreateWriter (dirDest + Path.DirectorySeparatorChar + info.OriginalFileName);
ChecksumStream validator = null;
if (info.ValidateCrc)
{
validator = new ChecksumStream (fos, new Crc32 ());
fos = validator;
}
Stream smInput = new SplitterMergerStream (info);
Stream input = smInput;
if (info.Compression == SplitterMergerCompression.GZIP_COMPRESSION)
{
input = new GZipStream (input, CompressionMode.Decompress);
}
byte[] buffer = new byte[Consts.BUFFER_LENGTH];
int leidos = 0;
while ((leidos = input.Read (buffer, 0, buffer.Length)) > 0)
{
fos.Write (buffer, 0, leidos);
OnProgress(smInput.Position, info.Length);
}
fos.Close ();
if (info.ValidateCrc)
{
if (validator.Crc.Value != info.Crc)
{
throw new ChecksumVerificationException ("Checksum verification failed", fichero);
}
}
}
}
public override int Read(byte[] buffer, int offset, int count)
{
int leidos = 0;
if (dataStream == null)
{
leidos = inputStream.Read (tmpBuffer, 0, 3);
this.Count (leidos);
if (leidos != 3)
{
return 0;
}
StringBuilder sb = new StringBuilder ();
for (int i = 0; i < 3; i++)
{
sb.Append ((char)tmpBuffer[i]);
}
string it = sb.ToString ();
if (!it.Equals ("SDT") && !it.Equals ("FDA"))
{
throw new IOException ("Unexpected file start tag:[" + it + "]");
}
this.currentBlock = ReadBlockHeader ();
this.currentBlockNumber = 1;
crc.Reset ();
dataStream = new ChecksumStream (new SizeLimiterStream (inputStream, currentBlock.Size), crc);
}
leidos = dataStream.Read (buffer, offset, count);
this.Count (leidos);
// Se termina el bloque
if (leidos < count) {
if (this.crc.Value != this.currentBlock.Crc)
{
throw new IOException ("Invalid checksum " + this.currentEntry.Name + ":" + this.currentBlockNumber);
}
if (this.currentBlockNumber == this.currentEntry.NumBlocks)
{
return leidos;
}
this.currentBlock = ReadBlockHeader ();
this.currentBlockNumber++;
crc.Reset ();
dataStream = new ChecksumStream(new SizeLimiterStream (inputStream, currentBlock.Size), crc);
return leidos + this.Read (buffer, offset + leidos, count - leidos);
}
return leidos;
}
