/// <summary>
/// Create a new UnshieldReader from an existing cabinet, index, and file descriptor
/// </summary>
public static Reader Create(InstallShieldCabinet cabinet, int index, FileDescriptor fileDescriptor)
{
var reader = new Reader
{
Cabinet = cabinet,
Index = (uint)index,
FileDescriptor = fileDescriptor,
};
for (; ;)
{
if (!reader.OpenVolume(fileDescriptor.Volume))
{
Console.Error.WriteLine($"Failed to open volume {fileDescriptor.Volume}");
return(null);
}
// Start with the correct volume for IS5 cabinets
if (reader.Cabinet.HeaderList.MajorVersion <= 5 && index > (int)reader.VolumeHeader.LastFileIndex)
{
fileDescriptor.Volume++;
continue;
}
break;
}
return(reader);
}
/// <summary>
/// Open a file as an InstallShield CAB, forcing a version
/// </summary>
public static InstallShieldCabinet OpenForceVersion(string filename, int version)
{
var cabinet = new InstallShieldCabinet();
if (!cabinet.CreateFilenamePattern(filename))
{
Console.Error.WriteLine("Failed to create filename pattern");
return(null);
}
if (!cabinet.ReadHeaders(version))
{
Console.Error.WriteLine("Failed to read header files");
return(null);
}
return(cabinet);
}