public static InArchiveFormat CheckSignature(string fileName)
{
using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
try
{
return(FileChecker.CheckSignature((Stream)fileStream));
}
catch (ArgumentException ex)
{
return(Formats.FormatByFileName(fileName, true));
}
}
}
private void Init(string archiveFullName)
{
this._FileName = archiveFullName;
this._Format = FileChecker.CheckSignature(archiveFullName);
SevenZipLibraryManager.LoadLibrary((object)this, (Enum)this._Format);
try
{
this._Archive = SevenZipLibraryManager.InArchive(this._Format, (object)this);
}
catch (SevenZipLibraryException ex)
{
SevenZipLibraryManager.FreeLibrary((object)this, (Enum)this._Format);
throw;
}
}
private void Init(Stream stream)
{
SevenZipExtractor.ValidateStream(stream);
this._Format = FileChecker.CheckSignature(stream);
SevenZipLibraryManager.LoadLibrary((object)this, (Enum)this._Format);
try
{
this._InStream = stream;
this._Archive = SevenZipLibraryManager.InArchive(this._Format, (object)this);
this._PackedSize = new long?(stream.Length);
}
catch (SevenZipLibraryException ex)
{
SevenZipLibraryManager.FreeLibrary((object)this, (Enum)this._Format);
throw;
}
}