private int SizeOfCodedToken(ClrCodedToken token)
{
CCodedTokenDef def = MetaModel.g_CodedTokens[(int)token];
int tagSize = CountBits(def.m_pTokens.Length - 1);
foreach (var tableMdt in def.m_pTokens)
{
ClrTable table = tableMdt.GetTable();
int rowIdxSize = CountBits(Math.Max(m_Schema.RowCount[table], 1) - 1);
if (tagSize + rowIdxSize > 16)
{
// one of the possible tables needs the 4 byte token.
return(4);
}
}
// we can index all possible tables with a 2-byte token.
return(2);
}
private int ColumnTypeSize(int type)
{
if (0 <= type && type <= MetaModel.iRidMax)
{
ClrTable table = (ClrTable)type;
long rowCount = m_Schema.RowCount[table];
return((rowCount > 0xFFFF) ? 4 : 2);
}
else if (MetaModel.iCodedToken <= type && type <= MetaModel.iCodedTokenMax)
{
ClrCodedToken cdtkn = (ClrCodedToken)(type - MetaModel.iCodedToken);
return(SizeOfCodedToken(cdtkn));
}
else if (type == MetaModel.iBYTE)
{
return(1);
}
else if (type == MetaModel.iSHORT || type == MetaModel.iUSHORT)
{
return(2);
}
else if (type == MetaModel.iLONG || type == MetaModel.iULONG)
{
return(4);
}
else if (type == MetaModel.iSTRING)
{
return(m_Schema.StringIndexSize);
}
else if (type == MetaModel.iGUID)
{
return(m_Schema.GuidIndexSize);
}
else if (type == MetaModel.iBLOB)
{
return(m_Schema.BlobIndexSize);
}
throw new ArgumentException("Unexpected metadata field type.");
}
