static internal bool AreSame(SqlCollation a, SqlCollation b)
{
if (a == null || b == null)
{
return(a == b);
}
else
{
return(a.info == b.info && a.sortId == b.sortId);
}
}
internal virtual void CopyFrom(SqlMetaDataPriv original)
{
this.type = original.type;
this.tdsType = original.tdsType;
this.precision = original.precision;
this.scale = original.scale;
this.length = original.length;
this.collation = original.collation;
this.codePage = original.codePage;
this.encoding = original.encoding;
this.isNullable = original.isNullable;
this.xmlSchemaCollectionDatabase = original.xmlSchemaCollectionDatabase;
this.xmlSchemaCollectionOwningSchema = original.xmlSchemaCollectionOwningSchema;
this.xmlSchemaCollectionName = original.xmlSchemaCollectionName;
this.metaType = original.metaType;
}
// valid for character types: Char, VarChar, Text, NChar, NVarChar, NText
internal void SetString(string value, int offset, int length)
{
Debug.Assert(
SmiXetterAccessMap.IsSetterAccessValid(_metaData, SmiXetterTypeCode.XetString));
// ANSI types must convert to byte[] because that's the tool we have.
if (MetaDataUtilsSmi.IsAnsiType(_metaData.SqlDbType))
{
byte[] bytes;
// Optimize for common case of writing entire string
if (offset == 0 && value.Length <= length)
{
bytes = _stateObj.Parser._defaultEncoding.GetBytes(value);
}
else
{
char[] chars = value.ToCharArray(offset, length);
bytes = _stateObj.Parser._defaultEncoding.GetBytes(chars);
}
SetBytes(0, bytes, 0, bytes.Length);
SetBytesLength(bytes.Length);
}
else if (SqlDbType.Variant == _metaData.SqlDbType)
{
Debug.Assert(null != _variantType && SqlDbType.NVarChar == _variantType.SqlDbType, "Invalid variant type");
SqlCollation collation = new SqlCollation();
collation.LCID = checked ((int)_variantType.LocaleId);
collation.SqlCompareOptions = _variantType.CompareOptions;
if (length * ADP.CharSize > TdsEnums.TYPE_SIZE_LIMIT)
{ // send as varchar for length greater than 4000
byte[] bytes;
// Optimize for common case of writing entire string
if (offset == 0 && value.Length <= length)
{
bytes = _stateObj.Parser._defaultEncoding.GetBytes(value);
}
else
{
bytes = _stateObj.Parser._defaultEncoding.GetBytes(value.ToCharArray(offset, length));
}
_stateObj.Parser.WriteSqlVariantHeader(9 + bytes.Length, TdsEnums.SQLBIGVARCHAR, 7, _stateObj);
_stateObj.Parser.WriteUnsignedInt(collation.info, _stateObj); // propbytes: collation.Info
_stateObj.WriteByte(collation.sortId); // propbytes: collation.SortId
_stateObj.Parser.WriteShort(bytes.Length, _stateObj); // propbyte: varlen
_stateObj.WriteByteArray(bytes, bytes.Length, 0);
}
else
{
_stateObj.Parser.WriteSqlVariantHeader(9 + length * ADP.CharSize, TdsEnums.SQLNVARCHAR, 7, _stateObj);
_stateObj.Parser.WriteUnsignedInt(collation.info, _stateObj); // propbytes: collation.Info
_stateObj.WriteByte(collation.sortId); // propbytes: collation.SortId
_stateObj.Parser.WriteShort(length * ADP.CharSize, _stateObj); // propbyte: varlen
_stateObj.Parser.WriteString(value, length, offset, _stateObj);
}
_variantType = null;
}
else if (_isPlp)
{
// Send the string as a complete PLP chunk.
_stateObj.Parser.WriteLong(length * ADP.CharSize, _stateObj); // PLP total length
_stateObj.Parser.WriteInt(length * ADP.CharSize, _stateObj); // Chunk length
_stateObj.Parser.WriteString(value, length, offset, _stateObj); // Data
if (length != 0)
{
_stateObj.Parser.WriteInt(TdsEnums.SQL_PLP_CHUNK_TERMINATOR, _stateObj); // Terminator
}
}
else
{
_stateObj.Parser.WriteShort(length * ADP.CharSize, _stateObj);
_stateObj.Parser.WriteString(value, length, offset, _stateObj);
}
}
