public static ArchiveBlockDescriptor Create(uint magic, BinaryReader reader)
{
ArchiveBlockDescriptor ret = null;
switch (magic)
{
case Signatures.ArchiveIndex:
ret = new ArchiveIndex();
ret.Populate(magic, reader);
break;
case Signatures.Pack:
ret = new PackDescriptor();
ret.Populate(magic, reader);
break;
case Signatures.Archive:
ret = new AssetArchiveResourceContainerDescriptor();
ret.Populate(magic, reader);
break;
}
//if (ret == null)
// Debug.WriteLine($"WARN: Unknown magic: {magic:X8}");
return(ret);
}
private IEnumerable <ArchiveBlockDescriptor> GetDescriptors(BlockTable blockTable)
{
foreach (var entry in blockTable)
{
if (entry.BlockSize == 0)
{
continue;
}
using (var mappedStream = File.CreateViewStream(entry.DirectoryOffset, entry.BlockSize, MemoryMappedFileAccess.Read))
using (var binaryReader = new BinaryReader(mappedStream))
{
var magic = binaryReader.ReadUInt32();
var blockDescriptor = ArchiveBlockDescriptor.Create(magic, binaryReader);
if (blockDescriptor != null)
{
yield return(blockDescriptor);
}
}
}
}
