/// <summary>
/// Finds all rows owned by <paramref name="key"/> in table <paramref name="tableSource"/>
/// whose index is <paramref name="keyColIndex"/>
/// </summary>
/// <param name="tableSource">Table to search</param>
/// <param name="keyColIndex">Key column index</param>
/// <param name="key">Key</param>
/// <returns>A <see cref="RidList"/> instance</returns>
protected RidList FindAllRows(MDTable tableSource, int keyColIndex, uint key)
{
uint startRid = BinarySearch(tableSource, keyColIndex, key);
if (tableSource.IsInvalidRID(startRid))
{
return(RidList.Empty);
}
uint endRid = startRid + 1;
var column = tableSource.TableInfo.Columns[keyColIndex];
for (; startRid > 1; startRid--)
{
if (!tablesStream.TryReadColumn24(tableSource, startRid - 1, column, out uint key2))
{
break; // Should never happen since startRid is valid
}
if (key != key2)
{
break;
}
}
for (; endRid <= tableSource.Rows; endRid++)
{
if (!tablesStream.TryReadColumn24(tableSource, endRid, column, out uint key2))
{
break; // Should never happen since endRid is valid
}
if (key != key2)
{
break;
}
}
return(RidList.Create(startRid, endRid - startRid));
}
/// <summary>
/// Reads a column
/// </summary>
/// <param name="table">The table</param>
/// <param name="rid">Row ID</param>
/// <param name="column">Column</param>
/// <param name="value">Result is put here or 0 if we return <c>false</c></param>
/// <returns><c>true</c> if we could read the column, <c>false</c> otherwise</returns>
public bool TryReadColumn(MDTable table, uint rid, ColumnInfo column, out uint value)
{
if (table.IsInvalidRID(rid))
{
value = 0;
return(false);
}
var cr = columnReader;
if (cr != null && cr.ReadColumn(table, rid, column, out value))
{
return(true);
}
var reader = table.DataReader;
reader.Position = (rid - 1) * (uint)table.TableInfo.RowSize + (uint)column.Offset;
value = column.Read(ref reader);
return(true);
}
internal bool TryReadColumn24(MDTable table, uint rid, ColumnInfo column, out uint value)
{
Debug.Assert(column.Size == 2 || column.Size == 4);
if (table.IsInvalidRID(rid))
{
value = 0;
return(false);
}
var cr = columnReader;
if (cr != null && cr.ReadColumn(table, rid, column, out value))
{
return(true);
}
var reader = table.DataReader;
reader.Position = (rid - 1) * (uint)table.TableInfo.RowSize + (uint)column.Offset;
value = column.Size == 2 ? reader.Unsafe_ReadUInt16() : reader.Unsafe_ReadUInt32();
return(true);
}