internal bool TryGetDocument(string fullPath, out DocumentHandle documentHandle)
{
var fileName = FileNameUtilities.GetFileName(fullPath);
KeyValuePair <DocumentNameAndHandle, ImmutableArray <DocumentNameAndHandle> > documents;
if (!_map.TryGetValue(fileName, out documents))
{
documentHandle = default(DocumentHandle);
return(false);
}
// SymReader first attempts to find the document by the full path, then by file name with extension.
if (documents.Key.FileName != null)
{
// There is only one document with the specified file name.
// SymReader returns the document regardless of whether the path matches the name.
documentHandle = documents.Key.Handle;
return(true);
}
Debug.Assert(documents.Value.Length > 1);
// We have multiple candidates with the same file name. Find the one whose name matches the specified full path.
// If none does return the first one. It will be the one with the smallest handle, due to the multi-map construction implementation.
// First try to find candidate whose full name is exactly matching.
foreach (DocumentNameAndHandle candidate in documents.Value)
{
if (_reader.StringComparer.Equals(_reader.GetDocument(candidate.Handle).Name, fullPath, ignoreCase: false))
{
documentHandle = candidate.Handle;
return(true);
}
}
// Then try to find candidate whose full name is matching ignoring case.
foreach (DocumentNameAndHandle candidate in documents.Value)
{
if (_reader.StringComparer.Equals(_reader.GetDocument(candidate.Handle).Name, fullPath, ignoreCase: true))
{
documentHandle = candidate.Handle;
return(true);
}
}
// Then try to find candidate whose file name is matching exactly.
foreach (DocumentNameAndHandle candidate in documents.Value)
{
if (candidate.FileName == fileName)
{
documentHandle = candidate.Handle;
return(true);
}
}
documentHandle = documents.Value[0].Handle;
return(true);
}
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));
}