/// <summary>
/// Returns true if the path uses the device syntax (\\.\)
/// </summary>
internal static bool IsDevice(StringBuilder path)
{
return path != null && path.StartsWithOrdinal(DevicePathPrefix);
}
/// <summary>
/// Returns true if the path uses the extended UNC syntax (\\?\UNC\)
/// </summary>
internal static bool IsExtendedUnc(StringBuilder path)
{
return path != null && path.StartsWithOrdinal(UncExtendedPathPrefix);
}
/// <summary>
/// Adds the extended path prefix (\\?\) if not already present and if the path is not relative or a device (\\.\).
/// </summary>
internal static void EnsureExtendedPrefix(StringBuilder path)
{
if (IsExtended(path) || IsRelative(path) || IsDevice(path))
return;
// Given \\server\share in longpath becomes \\?\UNC\server\share
if (path.StartsWithOrdinal(UncPathPrefix))
{
path.Insert(2, PathInternal.UncExtendedPrefixToInsert);
return;
}
path.Insert(0, PathInternal.ExtendedPathPrefix);
}
