/// <summary>
/// Opens an existing virtual disk.
/// </summary>
/// <param name="path">The path of the virtual disk to open, can be a URI</param>
/// <param name="access">The desired access to the disk</param>
/// <param name="user">The user name to use for authentication (if necessary)</param>
/// <param name="password">The password to use for authentication (if necessary)</param>
/// <returns>The Virtual Disk, or <c>null</c> if an unknown disk format</returns>
public static VirtualDisk OpenDisk(string path, FileAccess access, string user, string password)
{
Uri uri = PathToUri(path);
VirtualDisk result = null;
VirtualDiskTransport transport;
if (!DiskTransports.TryGetValue(uri.Scheme.ToUpperInvariant(), out transport))
{
throw new FileNotFoundException(string.Format(CultureInfo.InvariantCulture, "Unable to parse path '{0}'", path), path);
}
try
{
transport.Connect(uri, user, password);
if (transport.IsRawDisk)
{
result = transport.OpenDisk(access);
}
else
{
string extension = Path.GetExtension(uri.AbsolutePath).ToUpperInvariant();
if (extension.StartsWith(".", StringComparison.Ordinal))
{
extension = extension.Substring(1);
}
VirtualDiskFactory factory;
if (ExtensionMap.TryGetValue(extension, out factory))
{
result = factory.OpenDisk(transport.GetFileLocator(), transport.GetFileName(), access);
}
}
if (result != null)
{
result._transport = transport;
transport = null;
}
return(result);
}
finally
{
if (transport != null)
{
transport.Dispose();
}
}
}
internal static VirtualDiskLayer OpenDiskLayer(FileLocator locator, string path, FileAccess access)
{
string extension = Path.GetExtension(path).ToUpperInvariant();
if (extension.StartsWith(".", StringComparison.Ordinal))
{
extension = extension.Substring(1);
}
VirtualDiskFactory factory;
if (ExtensionMap.TryGetValue(extension, out factory))
{
return(factory.OpenDiskLayer(locator, path, access));
}
return(null);
}
/// <summary>
/// Opens an existing virtual disk, possibly from within an existing disk.
/// </summary>
/// <param name="fs">The file system to open the disk on.</param>
/// <param name="path">The path of the virtual disk to open.</param>
/// <param name="access">The desired access to the disk.</param>
/// <returns>The Virtual Disk, or <c>null</c> if an unknown disk format.</returns>
public static VirtualDisk OpenDisk(DiscFileSystem fs, string path, FileAccess access)
{
if (fs == null)
{
return(OpenDisk(path, access));
}
string extension = Path.GetExtension(path).ToUpperInvariant();
if (extension.StartsWith(".", StringComparison.Ordinal))
{
extension = extension.Substring(1);
}
VirtualDiskFactory factory;
if (ExtensionMap.TryGetValue(extension, out factory))
{
return(factory.OpenDisk(fs, path, access));
}
return(null);
}