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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
{
public struct MySqlDecimal : IMySqlValue
{
private byte precision;
private byte scale;
private string mValue;
private bool isNull;
internal MySqlDecimal(bool isNull)
{
this.isNull = isNull;
mValue = null;
precision = scale = 0;
}
internal MySqlDecimal(string val)
{
this.isNull = false;
precision = scale = 0;
mValue = val;
}
#region IMySqlValue Members
public bool IsNull
{
get { return isNull; }
}
MySqlDbType IMySqlValue.MySqlDbType
{
get { return MySqlDbType.Decimal; }
}
public byte Precision
{
get { return precision; }
set { precision = value; }
}
public byte Scale
{
get { return scale; }
set { scale = value; }
}
DbType IMySqlValue.DbType
{
get { return DbType.Decimal; }
}
object IMySqlValue.Value
{
get { return this.Value; }
}
public decimal Value
{
get { return Convert.ToDecimal(mValue, CultureInfo.InvariantCulture); }
}
public double ToDouble()
{
return Double.Parse(mValue);
}
public override string ToString()
{
return mValue;
}
Type IMySqlValue.SystemType
{
get { return typeof(decimal); }
}
string IMySqlValue.MySqlTypeName
{
get { return "DECIMAL"; }
}
void IMySqlValue.WriteValue(MySqlPacket packet, bool binary, object val, int length)
{
decimal v = (val is decimal) ? (decimal)val : Convert.ToDecimal(val);
string valStr = v.ToString(CultureInfo.InvariantCulture);
if (binary)
packet.WriteLenString(valStr);
else
packet.WriteStringNoNull(valStr);
}
IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
{
if (nullVal)
return new MySqlDecimal(true);
string s = String.Empty;
if (length == -1)
s = packet.ReadLenString();
else
s = packet.ReadString(length);
return new MySqlDecimal(s);
}
void IMySqlValue.SkipValue(MySqlPacket packet)
{
int len = (int)packet.ReadFieldLength();
packet.Position += len;
}
#endregion
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"] = "DECIMAL";
row["ProviderDbType"] = MySqlDbType.NewDecimal;
row["ColumnSize"] = 0;
row["CreateFormat"] = "DECIMAL({0},{1})";
row["CreateParameters"] = "precision,scale";
row["DataType"] = "System.Decimal";
row["IsAutoincrementable"] = false;
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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