private (DataHeader Header, Data Info) InsertInfo(int DataLen, int Pos)
{
var TotalLen = DataLen + HeadSize;
Data Gap;
Data Data;
if (PopGapMinLen(TotalLen, out Gap) == false)//// haven't free gap
{
var StreamLen = (int)Stream.Length;
Stream.AddLen(TotalLen);
Data = new Data()
{
From = StreamLen,
Len = TotalLen,
To = StreamLen + TotalLen - 1
};
}
else
{
Data = new Data()
{
From = Gap.From,
Len = TotalLen,
To = Gap.From + TotalLen - 1
};
if (Gap.Len > TotalLen)
{
Gap.Len = Gap.Len - TotalLen;
Gap.From = Gap.From + TotalLen;
var NextGap = Gap;
if (PopNextGap(ref NextGap))
{
Gap.Len += NextGap.Len;
Gap.To = NextGap.To;
}
InsertGap(Gap);
}
}
var Header = new DataHeader();
Header.DataLen = Data.Len;
Keys.Insert(Data, Pos);
if (Keys.Length == Pos + 1)
{
Header.NextData = -1;
}
else
{
Header.NextData = Keys[Pos + 1].From;
}
return(Header, Data);
}
public StreamCollection(System.IO.Stream Stream, int MinCount = 5000)
{
this.Stream = new DataWork.StreamController(Stream, 4, MinCount);
{
Keys = new Array <Data>();
GapsByFrom = new Array <DataByForm>();
GapsByLen = new Array <DataByLen>();
GapsByTo = new Array <DataByTo>();
var NextPos = BitConverter.ToInt32(this.Stream.GetHeader());
NextPos--;
if (NextPos != -1)
{
while (NextPos != -1)
{
this.Stream.Seek(NextPos, System.IO.SeekOrigin.Begin);
var Header = this.Stream.Read(HeadSize).Deserialize <DataHeader>();
Keys.Insert(new Data()
{
From = NextPos,
Len = Header.DataLen,
To = NextPos + Header.DataLen
});
NextPos = Header.NextData;
}
Length = Keys.Length;
var NewDatas = new Array <Data>();
NewDatas.BinaryInsert(Keys.ToArray());
var CurrentPos = 0;
for (int i = 0; i < NewDatas.Length; i++)
{
var NewData = NewDatas[i];
if (CurrentPos != NewData.From)
{
InsertGap(new Data()
{
From = CurrentPos,
Len = (NewData.From - CurrentPos),
To = NewData.From - 1
});
}
CurrentPos = NewData.To + 1;
}
}
}
Keys.ChangedNextSequence = (c) =>
{
if (c.Before == null)
{
if (Keys.Length > 0)
{
this.Stream.SetHeader(BitConverter.GetBytes(Keys[0].From + 1));
}
else
{
this.Stream.SetHeader(BitConverter.GetBytes(0));
}
}
else
{
var Data = c.Before.Value;
var Header = new DataHeader();
Header.DataLen = Data.Len;
if (c.Next == null)
{
Header.NextData = -1;
}
else
{
Header.NextData = c.Next.Value.From;
}
var Stream = this.Stream;
Stream.Seek(Data.From, System.IO.SeekOrigin.Begin);
Stream.Write(Header.Serialize(), 0, HeadSize);
}
};
}