public static bool IsDmgFile(Stream stream)
{
long headerPos = stream.Length - DmgHeader.HeaderSize;
if (headerPos < 0)
{
return(false);
}
stream.Position = headerPos;
return(DmgHeader.TryRead(stream, out _));
}
public DmgVolume(DmgArchive archive, Stream stream, string fileName, Readers.ReaderOptions readerOptions)
: base(stream, readerOptions)
{
_archive = archive;
_fileName = fileName;
long pos = stream.Length - DmgHeader.HeaderSize;
if (pos < 0)
{
throw new InvalidFormatException("Invalid DMG volume");
}
stream.Position = pos;
if (DmgHeader.TryRead(stream, out var header))
{
Header = header !;
}
else
{
throw new InvalidFormatException("Invalid DMG volume");
}
}