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// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
using System;
using System.Data;
using MySql.Data.MySqlClient;
using System.Globalization;
namespace MySql.Data.Types
{
internal struct MySqlByte : IMySqlValue
{
private sbyte mValue;
private bool isNull;
private bool treatAsBool;
public MySqlByte(bool isNull)
{
this.isNull = isNull;
mValue = 0;
treatAsBool = false;
}
public MySqlByte(sbyte val)
{
this.isNull = false;
mValue = val;
treatAsBool = false;
}
#region IMySqlValue Members
public bool IsNull
{
get { return isNull; }
}
MySqlDbType IMySqlValue.MySqlDbType
{
get { return MySqlDbType.Byte; }
}
DbType IMySqlValue.DbType
{
get
{
if (TreatAsBoolean)
return DbType.Boolean;
return DbType.SByte;
}
}
object IMySqlValue.Value
{
get
{
if (TreatAsBoolean)
return Convert.ToBoolean(mValue);
return mValue;
}
}
public sbyte Value
{
get { return mValue; }
set { mValue = value; }
}
Type IMySqlValue.SystemType
{
get
{
if (TreatAsBoolean)
return typeof(Boolean);
return typeof(sbyte);
}
}
string IMySqlValue.MySqlTypeName
{
get { return "TINYINT"; }
}
void IMySqlValue.WriteValue(MySqlPacket packet, bool binary, object val, int length)
{
sbyte v = (val is sbyte) ? (sbyte)val : Convert.ToSByte(val);
if (binary)
packet.WriteByte((byte)v);
else
packet.WriteStringNoNull(v.ToString());
}
IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
{
if (nullVal)
return new MySqlByte(true);
if (length == -1)
return new MySqlByte((sbyte)packet.ReadByte());
else
{
string s = packet.ReadString(length);
MySqlByte b = new MySqlByte(SByte.Parse(s, NumberStyles.Any, CultureInfo.InvariantCulture));
b.TreatAsBoolean = TreatAsBoolean;
return b;
}
}
void IMySqlValue.SkipValue(MySqlPacket packet)
{
packet.ReadByte();
}
#endregion
internal bool TreatAsBoolean
{
get { return treatAsBool; }
set { treatAsBool = value; }
}
internal static void SetDSInfo(DataTable dsTable)
{
// we use name indexing because this method will only be called
// when GetSchema is called for the DataSourceInformation
// collection and then it wil be cached.
DataRow row = dsTable.NewRow();
row["TypeName"] = "TINYINT";
row["ProviderDbType"] = MySqlDbType.Byte;
row["ColumnSize"] = 0;
row["CreateFormat"] = "TINYINT";
row["CreateParameters"] = null;
row["DataType"] = "System.SByte";
row["IsAutoincrementable"] = true;
row["IsBestMatch"] = true;
row["IsCaseSensitive"] = false;
row["IsFixedLength"] = true;
row["IsFixedPrecisionScale"] = true;
row["IsLong"] = false;
row["IsNullable"] = true;
row["IsSearchable"] = true;
row["IsSearchableWithLike"] = false;
row["IsUnsigned"] = false;
row["MaximumScale"] = 0;
row["MinimumScale"] = 0;
row["IsConcurrencyType"] = DBNull.Value;
row["IsLiteralSupported"] = false;
row["LiteralPrefix"] = null;
row["LiteralSuffix"] = null;
row["NativeDataType"] = null;
dsTable.Rows.Add(row);
}
}
}
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