/// <summary>
/// Load a Cache File from the Disk
/// </summary>
/// <param name="flname">the name of the File</param>
/// <param name="withprogress">true if you want to set the Progress in the current Wait control</param>
/// <exception cref="CacheException">Thrown if the File is not readable (ie, wrong Version or Signature)</exception>
public void Load(string flname, bool withprogress)
{
this.filename = flname;
containers.Clear();
if (!System.IO.File.Exists(flname))
{
return;
}
StreamItem si = StreamFactory.UseStream(flname, FileAccess.Read, true);
try
{
BinaryReader reader = new BinaryReader(si.FileStream);
try
{
ulong sig = reader.ReadUInt64();
if (sig != SIGNATURE)
{
throw new CacheException("Unknown Cache File Signature (" + Helper.HexString(sig) + ")", flname, 0);
}
version = reader.ReadByte();
if (version > VERSION)
{
throw new CacheException("Unable to read Cache", flname, version);
}
int count = reader.ReadInt32();
if (withprogress)
{
Wait.MaxProgress = count;
}
for (int i = 0; i < count; i++)
{
CacheContainer cc = new CacheContainer(DEFAULT_TYPE);
cc.Load(reader);
containers.Add(cc);
if (withprogress)
{
Wait.Progress = i;
}
if (i % 10 == 0)
{
System.Windows.Forms.Application.DoEvents();
}
}
}
finally
{
reader.Close();
}
}
finally
{
si.Close();
}
}
/// <summary>
/// Save a Cache File to the Disk
/// </summary>
/// <param name="flname">the name of the File</param>
public void Save(string flname)
{
this.filename = flname;
this.version = VERSION;
StreamItem si = StreamFactory.UseStream(flname, FileAccess.Write, true);
try
{
CleanUp();
si.FileStream.Seek(0, SeekOrigin.Begin);
si.FileStream.SetLength(0);
BinaryWriter writer = new BinaryWriter(si.FileStream);
writer.Write(SIGNATURE);
writer.Write(version);
writer.Write((int)containers.Count);
ArrayList offsets = new ArrayList();
//prepare the Index
for (int i = 0; i < containers.Count; i++)
{
offsets.Add(writer.BaseStream.Position);
containers[i].Save(writer, -1);
}
//write the Data
for (int i = 0; i < containers.Count; i++)
{
long offset = writer.BaseStream.Position;
writer.BaseStream.Seek((long)offsets[i], SeekOrigin.Begin);
containers[i].Save(writer, (int)offset);
}
}
finally
{
si.Close();
}
}