private Mogo.Util.PackageInfo GetPackageInfo(FileStream fileStream, long fileSize)
{
Mogo.Util.PackageInfo info = new Mogo.Util.PackageInfo();
if (fileSize < Mogo.Util.PackageInfo.GetPackageSize())
{
return(new Mogo.Util.PackageInfo());
}
fileStream.Position = fileSize - Mogo.Util.PackageInfo.GetPackageSize();
byte[] buffer = new byte[Mogo.Util.PackageInfo.GetPackageSize()];
fileStream.Read(buffer, 0, Mogo.Util.PackageInfo.GetPackageSize());
int index = 0;
info.IndexOffset = EncodeDecoder.DecodeUInt32(buffer, ref index);
return(info);
}
private void GetIndexInfo(long fileSize, bool needBackUpIndex)
{
lock (m_locker)
{
this.m_packageInfo = this.GetPackageInfo(this.m_fileStream, fileSize);
if ((this.m_packageInfo != null) && (this.m_packageInfo.IndexOffset != 0))
{
int count = (int)((fileSize - Mogo.Util.PackageInfo.GetPackageSize()) - this.m_packageInfo.IndexOffset);
byte[] buffer = new byte[count];
this.m_fileStream.Position = this.m_packageInfo.IndexOffset;
this.m_fileStream.Read(buffer, 0, count);
this.LoadIndexInfo(buffer, needBackUpIndex);
}
}
}
private bool CheckBackUpIndex()
{
string path = Path.Combine(Path.GetDirectoryName(this.m_fileFullName), this.BACK_UP).Replace(@"\", "/");
if (File.Exists(path))
{
FileInfo info = new FileInfo(path);
long length = info.Length;
FileStream fileStream = File.Open(path, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
this.m_packageInfo = this.GetPackageInfo(fileStream, length);
if ((this.m_packageInfo != null) && (this.m_packageInfo.IndexOffset != 0))
{
int count = ((int)length) - Mogo.Util.PackageInfo.GetPackageSize();
byte[] buffer = new byte[count];
fileStream.Position = 0L;
fileStream.Read(buffer, 0, count);
this.LoadIndexInfo(buffer, false);
}
return(true);
}
return(false);
}
