internal ClrMetadataAccessor(PeDotNetInformation mdParent, Stream peStream, STORAGESTREAM streamInfo, long baseOffset)
{
_mdParent = mdParent;
long offset = baseOffset + streamInfo.iOffset;
long end = offset + streamInfo.iSize;
peStream.Seek(offset, SeekOrigin.Begin);
_md = new CMiniMdBase(peStream);
_tables = new MetadataTableBase[_md.TableCount];
peStream.AlignToBytes(4);
for (int i = 0; i < _tables.Length; i++)
{
ClrTable table = (ClrTable)i;
Type recordType = _md[table].m_RecordType;
Type tableType = typeof(MetadataTable <>).MakeGenericType(recordType);
long startPosition = peStream.Position;
long tableSize = _md[table].m_cbRec * _md.Schema.RowCount[table];
long expectedEnd = startPosition + tableSize;
_tables[i] = (MetadataTableBase)Activator.CreateInstance(tableType, _md, table, peStream);
Debug.Assert(peStream.Position == expectedEnd);
}
long diff = peStream.Position - end;
Debug.Assert(diff == 0 || diff == -2 || diff == -4);
ulong validBits = _md.Schema.TableValidityBits;
for (int i = 0;
i < _tables.Length;
i++, validBits >>= 1)
{
if ((validBits & 1) != 0)
{
Debug.Assert(_tables[i].RowCount > 0, "used table has no rows.");
}
else
{
Debug.Assert(_tables[i].RowCount == 0, "unused table has rows.");
}
}
}
private STORAGESTREAM[] GetStreams(Stream peStream, int nStreams)
{
var streams = new STORAGESTREAM[nStreams];
for (int i = 0; i < nStreams; i++)
{
streams[i].iOffset = peStream.Read <uint>();
streams[i].iSize = peStream.Read <uint>();
streams[i].rcName = peStream.ReadUtf8ZeroTerminated();
peStream.AlignToBytes(4);
}
return(streams);
}