private static string GetFileName(MetadataReader reader, DocumentHandle documentHandle)
{
var document = reader.GetDocument(documentHandle);
if (document.Name.IsNil)
{
return null;
}
var nameReader = reader.GetBlobReader(document.Name);
int separator = nameReader.ReadByte();
if (!FileNameUtilities.IsDirectorySeparator((char)separator))
{
return FileNameUtilities.GetFileName(reader.GetString(document.Name));
}
// find the last part handle:
BlobHandle partHandle = default(BlobHandle);
while (nameReader.RemainingBytes > 0)
{
partHandle = nameReader.ReadBlobHandle();
}
if (partHandle.IsNil)
{
return string.Empty;
}
var partReader = reader.GetBlobReader(partHandle);
var part = partReader.ReadUTF8(partReader.Length);
if (part.IndexOf('\0') >= 0)
{
// bad metadata
return null;
}
// it is valid to encode document name so that the parts contain directory separators:
return FileNameUtilities.GetFileName(part);
}
