internal SequencePointCollection(MemoryBlock block, DocumentHandle document)
{
_block = block;
_document = document;
}
public bool MoveNext()
{
if (_reader.RemainingBytes == 0)
{
return(false);
}
DocumentHandle document = _current.Document;
int offset, deltaLines, deltaColumns, startLine;
ushort startColumn;
if (_reader.Offset == 0)
{
// header (skip local signature rid):
_reader.ReadCompressedInteger();
if (document.IsNil)
{
document = ReadDocumentHandle();
}
// IL offset:
offset = _reader.ReadCompressedInteger();
}
else
{
// skip all document records and update the current document accordingly:
int deltaOffset;
while ((deltaOffset = _reader.ReadCompressedInteger()) == 0)
{
document = ReadDocumentHandle();
}
// IL offset:
offset = AddOffsets(_current.Offset, deltaOffset);
}
ReadDeltaLinesAndColumns(out deltaLines, out deltaColumns);
// hidden
if (deltaLines == 0 && deltaColumns == 0)
{
_current = new SequencePoint(document, offset);
return(true);
}
// delta Start Line & Column:
if (_previousNonHiddenStartLine < 0)
{
Debug.Assert(_previousNonHiddenStartColumn == 0);
startLine = ReadLine();
startColumn = ReadColumn();
}
else
{
startLine = AddLines(_previousNonHiddenStartLine, _reader.ReadCompressedSignedInteger());
startColumn = AddColumns(_previousNonHiddenStartColumn, _reader.ReadCompressedSignedInteger());
}
_previousNonHiddenStartLine = startLine;
_previousNonHiddenStartColumn = startColumn;
_current = new SequencePoint(
document,
offset,
startLine,
startColumn,
AddLines(startLine, deltaLines),
AddColumns(startColumn, deltaColumns));
return(true);
}
public Document GetDocument(DocumentHandle handle)
{
return(new Document(this, handle));
}