private void ReadEntries()
{
char[] signature = ArchiveReader.ReadChars(4);
if (!signature.SequenceEqual(SIGNATURE))
{
throw new InvalidDataException("Missing EPFS signature.");
}
UInt32 fatOffset = ArchiveReader.ReadUInt32();
byte unknown = ArchiveReader.ReadByte();
UInt16 numberOfFiles = ArchiveReader.ReadUInt16();
long dataPos = ArchiveReader.BaseStream.Position;
//Jump to file table at the end of the file
if (fatOffset > ArchiveReader.BaseStream.Length)
{
throw new FormatException("FAT offset is higher than archive file length.");
}
ArchiveReader.BaseStream.Position = fatOffset;
//Read file table entries
for (int i = 0; i < numberOfFiles; i++)
{
EPFArchiveEntry epfArchiveEntry = null;
if (_mode == EPFArchiveMode.Update)
{
epfArchiveEntry = new EPFArchiveEntryForUpdate(this, dataPos);
}
else if (_mode == EPFArchiveMode.Read)
{
epfArchiveEntry = new EPFArchiveEntryForRead(this, dataPos);
}
else
{
throw new InvalidOperationException("Reading archive entries only possible in Read or Update mode.");
}
epfArchiveEntry.ReadInfo(ArchiveReader);
if (_entryDictionary.ContainsKey(epfArchiveEntry.Name))
{
throw new InvalidOperationException($"Entry with name '{epfArchiveEntry.Name}' already exists.");
}
AddEntry(epfArchiveEntry);
dataPos += epfArchiveEntry.CompressedLength;
}
_hiddenDataPos = dataPos;
_hiddenDataLength = (int)(fatOffset - dataPos);
HasHiddenData = _hiddenDataLength > 0;
}
/// <summary>
/// Find entry with given name (case insensitive search) and returns entry object controller
/// </summary>
/// <param name="entryName"></param>
/// <returns></returns>
public EPFArchiveEntry FindEntry(string entryName)
{
if (entryName == null)
{
throw new ArgumentNullException("entryName");
}
if (_mode == EPFArchiveMode.Create)
{
throw new NotSupportedException("Cannot access entries in Create mode.");
}
EPFArchiveEntry entry = null;
_entryDictionary.TryGetValue(entryName, out entry);
return(entry);
}
public EntryChangedEventArgs(EPFArchiveEntry entry, EntryChangedEventType eventType)
{
Entry = entry;
EventType = eventType;
}
private void AddEntry(EPFArchiveEntry entry)
{
_entries.Add(entry);
_entryDictionary.Add(entry.Name, entry);
RaiseEntryChanged(entry, EntryChangedEventType.Added);
}
internal void RaiseEntryChanged(EPFArchiveEntry entry, EntryChangedEventType eventType)
{
OnEntryChanged(new EntryChangedEventArgs(entry, eventType));
}
