private void UnpackMegFileFlatDirectoryHierarchy(MegFileHolder holder, string targetDirectory,
MegFileDataEntry megFileDataEntry)
{
string filePath = m_fileSystem.Path.Combine(targetDirectory, megFileDataEntry.RelativeFilePath);
filePath = m_fileSystem.Path.Combine(targetDirectory, m_fileSystem.Path.GetFileName(filePath));
using BinaryReader reader = GetBinaryReaderForFileHolder(holder);
ExtractFileFromMegArchive(reader, megFileDataEntry, filePath);
}
private void UnpackMegFilePreservingDirectoryHierarchy(MegFileHolder holder, string targetDirectory,
MegFileDataEntry megFileDataEntry)
{
string filePath = m_fileSystem.Path.Combine(targetDirectory, megFileDataEntry.RelativeFilePath);
string path = m_fileSystem.FileInfo.FromFileName(filePath).Directory.FullName;
CreateTargetDirectoryIfNotExists(path);
using BinaryReader reader = GetBinaryReaderForFileHolder(holder);
ExtractFileFromMegArchive(reader, megFileDataEntry, filePath);
}
private void ExtractFileFromMegArchive(BinaryReader readStream, MegFileDataEntry megFileDataEntry,
string filePath)
{
byte[] buffer = new byte[BUFFER_SIZE];
readStream.BaseStream.Seek(megFileDataEntry.Offset, SeekOrigin.Begin);
using Stream writeStream =
m_fileSystem.FileStream.Create(filePath, FileMode.Append, FileAccess.Write, FileShare.None);
int bytesRead;
int bytesToWrite = Convert.ToInt32(megFileDataEntry.Size);
while ((bytesRead = readStream.Read(buffer, 0, Math.Min(buffer.Length, bytesToWrite))) > 0)
{
bytesToWrite -= bytesRead;
writeStream.Write(buffer, 0, bytesRead);
}
}
