private unsafe void ReadLookupTable()
{
_file.Position = _header.LookupTable.OffsetInWim;
ulong entries = _header.LookupTable.OriginalSize / (ulong)sizeof(LookupEntry);
var entryArray = new LookupEntry[entries];
for (ulong i = 0; i < entries; i++)
{
byte[] bEntry = _reader.ReadBytes(sizeof(LookupEntry));
fixed(byte *pEntry = bEntry)
{
entryArray[i] = Marshal.PtrToStructure <LookupEntry>((IntPtr)pEntry);
}
}
_lookupTable = new LookupTable(entryArray);
}
private unsafe void LoadImageMetadata(int imageIndex)
{
if (_lookupTable == null)
{
ReadLookupTable();
}
if (imageIndex >= _header.ImageCount)
{
throw new ArgumentOutOfRangeException(nameof(imageIndex));
}
LookupEntry metadataEntry = _lookupTable.Entries.Where(l => (l.Flags & ResourceHeaderFlags.Metadata) == ResourceHeaderFlags.Metadata).OrderBy(l => l.OffsetInWim).Skip(imageIndex).First();
_file.Position = metadataEntry.OffsetInWim;
byte[] bTable = _reader.ReadBytes(sizeof(SecurityTableHeader));
SecurityTableHeader stHeader;
fixed(byte *pTable = bTable)
{
stHeader = Marshal.PtrToStructure <SecurityTableHeader>((IntPtr)pTable);
}
var sdLengths = new ulong[stHeader.EntryCount];
for (int i = 0; i < sdLengths.Length; i++)
{
sdLengths[i] = _reader.ReadUInt64();
}
var sdDescriptors = new byte[stHeader.EntryCount][];
for (int i = 0; i < sdLengths.Length; i++)
{
sdDescriptors[i] = _reader.ReadBytes((int)sdLengths[i]);
}
SecurityTable st = new SecurityTable(stHeader, sdDescriptors);
var dirEntries = new List <DirectoryTableEntry>();
while (_file.Position < metadataEntry.OffsetInWim + (long)metadataEntry.SizeInWim)
{
long startPosition = _file.Position;
byte[] bdEntry = _reader.ReadBytes(sizeof(DirectoryEntry));
DirectoryEntry dEntry;
fixed(byte *pdEntry = bdEntry)
{
dEntry = Marshal.PtrToStructure <DirectoryEntry>((IntPtr)pdEntry);
}
string name = Encoding.Unicode.GetString(_reader.ReadBytes(dEntry.FileNameLength));
var altStreams = new Dictionary <string, StreamEntry>(dEntry.Streams);
for (int i = 0; i < dEntry.Streams; i++)
{
byte[] bsEntry = _reader.ReadBytes(sizeof(StreamEntry));
StreamEntry sEntry;
fixed(byte *psEntry = bsEntry)
{
sEntry = Marshal.PtrToStructure <StreamEntry>((IntPtr)psEntry);
}
string sName = Encoding.Unicode.GetString(_reader.ReadBytes(sEntry.StreamNameLength));
altStreams.Add(sName, sEntry);
}
dirEntries.Add(new DirectoryTableEntry(name, dEntry, altStreams));
// TODO: Transveral logic
}
_images[imageIndex] = new WimImage(st, dirEntries.ToArray());
}
