public int encodeByte(byte[] buffer, out byte[] output)
{
YEncEncoder encoder = new YEncEncoder();
int bytesRead = buffer.Length;
// Get the number of bytes for the number of bytes read
int destSize = encoder.GetByteCount(buffer, 0, bytesRead, true);
output = new byte[destSize];
int bytesWritten = encoder.GetBytes(buffer, 0, bytesRead, output, 0, true);
return bytesWritten;
}
public void ProcessFile(string dir, string fileName)
{
// Memory buffer
byte[] original = new byte[SegmentSize];
// Create yEnc temp dir
string yEncDir = Path.Combine(dir, "yEnc");
Directory.CreateDirectory(yEncDir);
using (FileStream fsInput = File.OpenRead(fileName))
{
FileInfo f = new FileInfo(fileName);
long fileSize = f.Length;
long nrSegments = fileSize / SegmentSize;
// Division ignores the remained. If there is a remainder increase the nrSegments with 1
if (fileSize % SegmentSize != 0)
nrSegments++;
writeLog("Files found: " + fileName + " File Size: " + fileSize.ToString() + " Nr of Segments: " + nrSegments);
YEncEncoder encoder = new YEncEncoder();
for (int i = 0; i < nrSegments; i++)
{
// Create Output file
string segmentFileName = Path.Combine(yEncDir, (i + 1).ToString("D8") + ".ync");
FileStream fsOutput = new FileStream(segmentFileName, FileMode.Create, FileAccess.Write, FileShare.Write);
bool flush = false;
int bytesRead = fsInput.Read(original, 0, SegmentSize);
if (((i + 1) * SegmentSize) >= fileSize)
flush = true;
// Get the number of bytes for the number of bytes read
int destSize = encoder.GetByteCount(original, 0, bytesRead, flush);
byte[] destBatch = new byte[destSize];
int bytesWritten = encoder.GetBytes(original, 0, bytesRead, destBatch, 0, true);
string header = "";
string trailer = "";
if (nrSegments == 1)
{
// Single Part
// =ybegin line=128 size=123456 name=mybinary.dat
header = "=ybegin line=128 size=" + bytesRead + " name=" + Path.GetFileName(fileName) + Environment.NewLine;
// Trailer
trailer = Environment.NewLine + "=yend size=" + bytesRead + " crc32=" + BitConverter.ToString(encoder.CRCHash).Replace("-", "").ToLower();
}
else
{
//Header
header = "=ybegin part=" + (i + 1).ToString() + " line = 128 size=" + bytesRead + " name=" + Path.GetFileName(fileName) + Environment.NewLine;
header += "=ypart begin=" + ((i * SegmentSize) + 1) + " end=" + ((i * SegmentSize) + bytesRead) + Environment.NewLine;
// Trailer
trailer = Environment.NewLine + "=yend size=" + bytesRead + " pcrc32=" + BitConverter.ToString(encoder.CRCHash).Replace("-", "").ToLower();
}
writeLog(header);
writeLog(trailer);
//here is where we would write off the batch to a file. Lets do that.
try
{
fsOutput.Write(Encoding.ASCII.GetBytes(header), 0, header.Length);
fsOutput.Write(destBatch, 0, bytesWritten);
fsOutput.Write(Encoding.ASCII.GetBytes(trailer), 0, trailer.Length);
}
finally
{
fsOutput.Close();
}
}
}
}
