public int AddIndex(long position, Guid MetaHash = default(Guid))
{
lock (_locker)
{
long currentposition = this.IndexStream.Length;
// check to make sure it is the right position.
var left = currentposition % 24;
if (left != 0)
{
var count = (int)currentposition / 24;
if (count * 8 > currentposition)
{
currentposition = count * 24;
}
else
{
currentposition = (count + 1) * 24;
}
this.IndexStream.SetLength(currentposition);
}
this.IndexStream.Position = currentposition;
DocInfo info = new DocInfo()
{
Position = position, MetaHash = MetaHash
};
this.IndexStream.Write(info.ToBytes(), 0, 24);
int id = (int)(currentposition / 24);
this.Docs[id] = info;
return(id);
}
}
public void LoadIndex(string fileName = null)
{
if (fileName == null)
{
fileName = this.IndexFile;
}
if (File.Exists(fileName))
{
var allBytes = Lib.Helper.IOHelper.ReadAllBytes(fileName);
int len = allBytes.Length;
int maxindex = (int)(len / 24);
if (maxindex * 24 > len)
{
maxindex = maxindex - 1;
}
for (int i = 0; i < maxindex; i++)
{
DocInfo info = new DocInfo();
byte[] infobytes = new byte[24];
Buffer.BlockCopy(allBytes, i * 24, infobytes, 0, 24);
info.FromBytes(infobytes);
if (info.Position > 0)
{
this.Docs[i] = info;
}
}
}
}
public void UpdateIndex(int id, long newposition, string meta)
{
var position = id * 24;
Guid metahash = Lib.Security.Hash.ComputeGuidIgnoreCase(meta);
var total = this.IndexStream.Length;
if (total >= position + 24)
{
lock (_locker)
{
if (this.Docs.ContainsKey(id))
{
this.IndexStream.Position = position;
DocInfo newinfo = new DocInfo()
{
Position = newposition, MetaHash = metahash
};
this.IndexStream.Write(newinfo.ToBytes(), 0, 24);
this.Docs[id] = newinfo;
}
}
}
}
