SqlDouble.cs

Go to the documentation of this file.

using System.Data.Common;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
 
namespace System.Data.SqlTypes;
 
[Serializable]
[XmlSchemaProvider("GetXsdType")]
[TypeForwardedFrom("System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
public struct SqlDouble : INullable, IComparable, IXmlSerializable
{
    private bool m_fNotNull;
 
    private double m_value;
 
    public static readonly SqlDouble Null = new SqlDouble(fNull: true);
 
    public static readonly SqlDouble Zero = new SqlDouble(0.0);
 
    public static readonly SqlDouble MinValue = new SqlDouble(double.MinValue);
 
    public static readonly SqlDouble MaxValue = new SqlDouble(double.MaxValue);
 
    public bool IsNull => !m_fNotNull;
 
    public double Value
    {
        get
        {
            if (m_fNotNull)
            {
                return m_value;
            }
            throw new SqlNullValueException();
        }
    }
 
    private SqlDouble(bool fNull)
    {
        m_fNotNull = false;
        m_value = 0.0;
    }
 
    public SqlDouble(double value)
    {
        if (!double.IsFinite(value))
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        m_value = value;
        m_fNotNull = true;
    }
 
    public static implicit operator SqlDouble(double x)
    {
        return new SqlDouble(x);
    }
 
    public static explicit operator double(SqlDouble x)
    {
        return x.Value;
    }
 
    public override string ToString()
    {
        if (!IsNull)
        {
            return m_value.ToString((IFormatProvider?)null);
        }
        return SQLResource.NullString;
    }
 
    public static SqlDouble Parse(string s)
    {
        if (s == SQLResource.NullString)
        {
            return Null;
        }
        return new SqlDouble(double.Parse(s, CultureInfo.InvariantCulture));
    }
 
    public static SqlDouble operator -(SqlDouble x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(0.0 - x.m_value);
        }
        return Null;
    }
 
    public static SqlDouble operator +(SqlDouble x, SqlDouble y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        double num = x.m_value + y.m_value;
        if (double.IsInfinity(num))
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlDouble(num);
    }
 
    public static SqlDouble operator -(SqlDouble x, SqlDouble y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        double num = x.m_value - y.m_value;
        if (double.IsInfinity(num))
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlDouble(num);
    }
 
    public static SqlDouble operator *(SqlDouble x, SqlDouble y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        double num = x.m_value * y.m_value;
        if (double.IsInfinity(num))
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlDouble(num);
    }
 
    public static SqlDouble operator /(SqlDouble x, SqlDouble y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        if (y.m_value == 0.0)
        {
            throw new DivideByZeroException(SQLResource.DivideByZeroMessage);
        }
        double num = x.m_value / y.m_value;
        if (double.IsInfinity(num))
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlDouble(num);
    }
 
    public static explicit operator SqlDouble(SqlBoolean x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble((int)x.ByteValue);
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlByte x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble((int)x.Value);
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlInt16 x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(x.Value);
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlInt32 x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(x.Value);
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlInt64 x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(x.Value);
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlSingle x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(x.Value);
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlMoney x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(x.ToDouble());
        }
        return Null;
    }
 
    public static implicit operator SqlDouble(SqlDecimal x)
    {
        if (!x.IsNull)
        {
            return new SqlDouble(x.ToDouble());
        }
        return Null;
    }
 
    public static explicit operator SqlDouble(SqlString x)
    {
        if (x.IsNull)
        {
            return Null;
        }
        return Parse(x.Value);
    }
 
    public static SqlBoolean operator ==(SqlDouble x, SqlDouble y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value == y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator !=(SqlDouble x, SqlDouble y)
    {
        return !(x == y);
    }
 
    public static SqlBoolean operator <(SqlDouble x, SqlDouble y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value < y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator >(SqlDouble x, SqlDouble y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value > y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator <=(SqlDouble x, SqlDouble y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value <= y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator >=(SqlDouble x, SqlDouble y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value >= y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlDouble Add(SqlDouble x, SqlDouble y)
    {
        return x + y;
    }
 
    public static SqlDouble Subtract(SqlDouble x, SqlDouble y)
    {
        return x - y;
    }
 
    public static SqlDouble Multiply(SqlDouble x, SqlDouble y)
    {
        return x * y;
    }
 
    public static SqlDouble Divide(SqlDouble x, SqlDouble y)
    {
        return x / y;
    }
 
    public static SqlBoolean Equals(SqlDouble x, SqlDouble y)
    {
        return x == y;
    }
 
    public static SqlBoolean NotEquals(SqlDouble x, SqlDouble y)
    {
        return x != y;
    }
 
    public static SqlBoolean LessThan(SqlDouble x, SqlDouble y)
    {
        return x < y;
    }
 
    public static SqlBoolean GreaterThan(SqlDouble x, SqlDouble y)
    {
        return x > y;
    }
 
    public static SqlBoolean LessThanOrEqual(SqlDouble x, SqlDouble y)
    {
        return x <= y;
    }
 
    public static SqlBoolean GreaterThanOrEqual(SqlDouble x, SqlDouble y)
    {
        return x >= y;
    }
 
    public SqlBoolean ToSqlBoolean()
    {
        return (SqlBoolean)this;
    }
 
    public SqlByte ToSqlByte()
    {
        return (SqlByte)this;
    }
 
    public SqlInt16 ToSqlInt16()
    {
        return (SqlInt16)this;
    }
 
    public SqlInt32 ToSqlInt32()
    {
        return (SqlInt32)this;
    }
 
    public SqlInt64 ToSqlInt64()
    {
        return (SqlInt64)this;
    }
 
    public SqlMoney ToSqlMoney()
    {
        return (SqlMoney)this;
    }
 
    public SqlDecimal ToSqlDecimal()
    {
        return (SqlDecimal)this;
    }
 
    public SqlSingle ToSqlSingle()
    {
        return (SqlSingle)this;
    }
 
    public SqlString ToSqlString()
    {
        return (SqlString)this;
    }
 
    public int CompareTo(object? value)
    {
        if (value is SqlDouble value2)
        {
            return CompareTo(value2);
        }
        throw ADP.WrongType(value.GetType(), typeof(SqlDouble));
    }
 
    public int CompareTo(SqlDouble value)
    {
        if (IsNull)
        {
            if (!value.IsNull)
            {
                return -1;
            }
            return 0;
        }
        if (value.IsNull)
        {
            return 1;
        }
        if (this < value)
        {
            return -1;
        }
        if (this > value)
        {
            return 1;
        }
        return 0;
    }
 
    public override bool Equals([NotNullWhen(true)] object? value)
    {
        if (!(value is SqlDouble sqlDouble))
        {
            return false;
        }
        if (sqlDouble.IsNull || IsNull)
        {
            if (sqlDouble.IsNull)
            {
                return IsNull;
            }
            return false;
        }
        return (this == sqlDouble).Value;
    }
 
    public override int GetHashCode()
    {
        if (!IsNull)
        {
            return Value.GetHashCode();
        }
        return 0;
    }
 
    XmlSchema IXmlSerializable.GetSchema()
    {
        return null;
    }
 
    void IXmlSerializable.ReadXml(XmlReader reader)
    {
        string attribute = reader.GetAttribute("nil", "http://www.w3.org/2001/XMLSchema-instance");
        if (attribute != null && XmlConvert.ToBoolean(attribute))
        {
            reader.ReadElementString();
            m_fNotNull = false;
        }
        else
        {
            m_value = XmlConvert.ToDouble(reader.ReadElementString());
            m_fNotNull = true;
        }
    }
 
    void IXmlSerializable.WriteXml(XmlWriter writer)
    {
        if (IsNull)
        {
            writer.WriteAttributeString("xsi", "nil", "http://www.w3.org/2001/XMLSchema-instance", "true");
        }
        else
        {
            writer.WriteString(XmlConvert.ToString(m_value));
        }
    }
 
    public static XmlQualifiedName GetXsdType(XmlSchemaSet schemaSet)
    {
        return new XmlQualifiedName("double", "http://www.w3.org/2001/XMLSchema");
    }
}