internal CompoundDocument(Stream stream, FileHeader header)
{
this.FileStorage = stream;
this.Reader = new BinaryReader(this.FileStorage);
// added this "if" to prevent exception when file is read only
if( this.FileStorage.CanWrite )
this.Writer = new BinaryWriter(this.FileStorage, Encoding.Unicode);
this.Header = header;
this.SectorSize = (int)Math.Pow(2, Header.SectorSizeInPot);
// prevent errors by limiting sector size to a most used value of 2^9
// compare it to zero because this integer can overflow
if (this.SectorSize < 0)
this.SectorSize = 512;
this.ShortSectorSize = (int)Math.Pow(2, Header.ShortSectorSizeInPot);
// prevent errors by limiting sector size to a most used value of 2^6
// compare it to zero because this integer can overflow
if (this.ShortSectorSize < 0)
this.ShortSectorSize = 64;
this.TotalSectors = stream.Length == 0 ? 0
: (int)(stream.Length - 512) / this.SectorSize;
this.MasterSectorAllocation = new MasterSectorAllocation(this);
this.SectorAllocation = new SectorAllocation(this);
this.ShortSectorAllocation = new ShortSectorAllocation(this);
}
private byte[] GetShortStreamDataAsBytes(int StartSSID)
{
List <int> chain = ShortSectorAllocation.GetSIDChain(StartSSID);
List <byte> data = new List <byte>();
foreach (int sid in chain)
{
data.AddRange(ReadShortSectorDataAsBytes(sid));
}
return(data.ToArray());
}
internal CompoundDocument(Stream stream, FileHeader header)
{
this.FileStorage = stream;
this.Reader = new BinaryReader(this.FileStorage);
this.Writer = new BinaryWriter(this.FileStorage, Encoding.Unicode);
this.Header = header;
checked
{
this.SectorSize = (int)Math.Pow(2.0, (double)this.Header.SectorSizeInPot);
this.ShortSectorSize = (int)Math.Pow(2.0, (double)this.Header.ShortSectorSizeInPot);
this.TotalSectors = ((stream.Length == 0L) ? 0 : ((int)(stream.Length - 512L) / this.SectorSize));
this.MasterSectorAllocation = new MasterSectorAllocation(this);
this.SectorAllocation = new SectorAllocation(this);
this.ShortSectorAllocation = new ShortSectorAllocation(this);
}
}
internal CompoundDocument(Stream stream, FileHeader header)
{
this.FileStorage = stream;
this.Reader = new BinaryReader(this.FileStorage);
this.Writer = new BinaryWriter(this.FileStorage, Encoding.Unicode);
this.Header = header;
this.SectorSize = (int)Math.Pow(2, Header.SectorSizeInPot);
this.ShortSectorSize = (int)Math.Pow(2, Header.ShortSectorSizeInPot);
this.TotalSectors = stream.Length == 0 ? 0
: (int)(stream.Length - 512) / this.SectorSize;
this.MasterSectorAllocation = new MasterSectorAllocation(this);
this.SectorAllocation = new SectorAllocation(this);
this.ShortSectorAllocation = new ShortSectorAllocation(this);
}
internal void WriteShortStreamData(int startSID, byte[] data)
{
int prev_sid = SID.EOC;
int sid = startSID;
int index = 0;
while (index < data.Length)
{
if (sid == SID.EOC)
{
if (prev_sid == SID.EOC)
{
sid = this.ShortSectorAllocation.AllocateSector();
}
else
{
sid = this.ShortSectorAllocation.AllocateSectorAfter(prev_sid);
}
}
int offset = GetShortSectorOffset(sid);
ShortStreamContainer.Position = offset;
if (index + ShortSectorSize < data.Length)
{
ShortStreamContainer.Write(data, index, ShortSectorSize);
}
else
{
ShortStreamContainer.Write(data, index, data.Length - index);
}
index += ShortSectorSize;
prev_sid = sid;
sid = this.ShortSectorAllocation.GetNextSectorID(prev_sid);
}
if (sid != SID.EOC && prev_sid != SID.EOC)
{
ShortSectorAllocation.LinkSectorID(prev_sid, SID.EOC);
while (sid != SID.EOC)
{
int next_sid = ShortSectorAllocation.GetNextSectorID(sid);
ShortSectorAllocation.LinkSectorID(sid, SID.Free);
sid = next_sid;
}
}
}
internal CompoundDocument(Stream stream, FileHeader header)
{
this.FileStorage = stream;
this.Reader = new BinaryReader(this.FileStorage);
if (stream.CanWrite)
{
this.Writer = new BinaryWriter(this.FileStorage, Encoding.Unicode);
}
this.Header = header;
this.SectorSize = (int)Math.Pow(2, Header.SectorSizeInPot);
this.ShortSectorSize = (int)Math.Pow(2, Header.ShortSectorSizeInPot);
this.TotalSectors = stream.Length == 0 ? 0
: (int)(stream.Length - 512) / this.SectorSize;
this.MasterSectorAllocation = new MasterSectorAllocation(this);
this.SectorAllocation = new SectorAllocation(this);
this.ShortSectorAllocation = new ShortSectorAllocation(this);
}
internal CompoundDocument(Stream stream, FileHeader header)
{
this.FileStorage = stream;
this.Reader = new BinaryReader(this.FileStorage);
try
{
this.Writer = new BinaryWriter(this.FileStorage, Encoding.Unicode);
}
catch (Exception StreamNotReadable)
{
Console.Write("stream not readable");
}
this.Header = header;
this.SectorSize = (int)Math.Pow(2, Header.SectorSizeInPot);
this.ShortSectorSize = (int)Math.Pow(2, Header.ShortSectorSizeInPot);
this.TotalSectors = stream.Length == 0 ? 0
: (int)(stream.Length - 512) / this.SectorSize;
this.MasterSectorAllocation = new MasterSectorAllocation(this);
this.SectorAllocation = new SectorAllocation(this);
this.ShortSectorAllocation = new ShortSectorAllocation(this);
}