/// <summary>
/// Create a new, blank, compound file.
/// </summary>
/// <param name="cfsVersion">Use a specific Compound File Version to set 512 or 4096 bytes sectors</param>
/// <param name="sectorRecycle">If true, recycle unused sectors</param>
/// <example>
/// <code>
///
/// byte[] b = new byte[10000];
/// for (int i = 0; i < 10000; i++)
/// {
/// b[i % 120] = (byte)i;
/// }
///
/// CompoundFile cf = new CompoundFile(CFSVersion.Ver_4, true, true);
/// CFStream myStream = cf.RootStorage.AddStream("MyStream");
///
/// Assert.IsNotNull(myStream);
/// myStream.SetData(b);
/// cf.Save("MyCompoundFile.cfs");
/// cf.Close();
///
/// </code>
/// </example>
/// <remarks>
/// Sector recycling reduces data writing performances but avoids space wasting in scenarios with frequently
/// data manipulation of the same streams. The new compound file is open in Update mode.
/// </remarks>
public CompoundFile(CFSVersion cfsVersion, bool sectorRecycle)
{
_header = new Header((ushort) cfsVersion);
_sectorRecycle = sectorRecycle;
_difatSectorFATEntriesCount = (GetSectorSize()/4) - 1;
_fatSectorEntriesCount = (GetSectorSize()/4);
//Root --
RootStorage = new CFStorage(this);
RootStorage.DirEntry.SetEntryName("Root Entry");
RootStorage.DirEntry.StgType = StgType.StgRoot;
}
/// <summary>
/// Load compound file from an existing stream.
/// </summary>
/// <param name="stream">Stream to load compound file from</param>
private void Load(Stream stream)
{
try
{
_header = new Header();
_directoryEntries = new List<IDirectoryEntry>();
SourceStream = stream;
_header.Read(stream);
var numberOfSectors = Ceiling(((stream.Length - GetSectorSize())/(double) GetSectorSize()));
if (stream.Length > 0x7FFFFF0)
TransactionLockAllocated = true;
_sectors = new SectorCollection();
for (var i = 0; i < numberOfSectors; i++)
_sectors.Add(null);
LoadDirectories();
RootStorage = new CFStorage(this, _directoryEntries[0]);
}
catch (Exception)
{
if (stream != null)
stream.Close();
throw;
}
}
/// <summary>
/// Create a blank, version 3 compound file.
/// Sector recycle is turned off to achieve the best reading/writing
/// performance in most common scenarios.
/// </summary>
/// <example>
/// <code>
///
/// byte[] b = new byte[10000];
/// for (int i = 0; i < 10000; i++)
/// {
/// b[i % 120] = (byte)i;
/// }
///
/// CompoundFile cf = new CompoundFile();
/// CFStream myStream = cf.RootStorage.AddStream("MyStream");
///
/// Assert.IsNotNull(myStream);
/// myStream.SetData(b);
/// cf.Save("MyCompoundFile.cfs");
/// cf.Close();
///
/// </code>
/// </example>
public CompoundFile()
{
_header = new Header();
_sectorRecycle = false;
_difatSectorFATEntriesCount = (GetSectorSize()/4) - 1;
_fatSectorEntriesCount = (GetSectorSize()/4);
//Root --
RootStorage = new CFStorage(this);
RootStorage.DirEntry.SetEntryName("Root Entry");
RootStorage.DirEntry.StgType = StgType.StgRoot;
}
/// <summary>
/// When called from user code, release all resources, otherwise, in the case runtime called it,
/// only unmanagd resources are released.
/// </summary>
/// <param name="disposing">If true, method has been called from User code, if false it's been called from .net runtime</param>
protected virtual void Dispose(bool disposing)
{
try
{
if (!IsClosed)
{
lock (_lockObject)
{
if (disposing)
{
// Call from user code...
if (_sectors != null)
{
_sectors.Clear();
_sectors = null;
}
RootStorage = null; // Some problem releasing resources...
_header = null;
_directoryEntries.Clear();
_directoryEntries = null;
_lockObject = null;
_buffer = null;
}
if (SourceStream != null)
SourceStream.Close();
}
}
}
finally
{
IsClosed = true;
}
}
