SqlInt16.cs

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using System.Data.Common;
using System.Diagnostics.CodeAnalysis;
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 SqlInt16 : INullable, IComparable, IXmlSerializable
{
    private bool m_fNotNull;
 
    private short m_value;
 
    public static readonly SqlInt16 Null = new SqlInt16(fNull: true);
 
    public static readonly SqlInt16 Zero = new SqlInt16(0);
 
    public static readonly SqlInt16 MinValue = new SqlInt16(short.MinValue);
 
    public static readonly SqlInt16 MaxValue = new SqlInt16(short.MaxValue);
 
    public bool IsNull => !m_fNotNull;
 
    public short Value
    {
        get
        {
            if (m_fNotNull)
            {
                return m_value;
            }
            throw new SqlNullValueException();
        }
    }
 
    private SqlInt16(bool fNull)
    {
        m_fNotNull = false;
        m_value = 0;
    }
 
    public SqlInt16(short value)
    {
        m_value = value;
        m_fNotNull = true;
    }
 
    public static implicit operator SqlInt16(short x)
    {
        return new SqlInt16(x);
    }
 
    public static explicit operator short(SqlInt16 x)
    {
        return x.Value;
    }
 
    public override string ToString()
    {
        if (!IsNull)
        {
            return m_value.ToString((IFormatProvider?)null);
        }
        return SQLResource.NullString;
    }
 
    public static SqlInt16 Parse(string s)
    {
        if (s == SQLResource.NullString)
        {
            return Null;
        }
        return new SqlInt16(short.Parse(s, null));
    }
 
    public static SqlInt16 operator -(SqlInt16 x)
    {
        if (!x.IsNull)
        {
            return new SqlInt16((short)(-x.m_value));
        }
        return Null;
    }
 
    public static SqlInt16 operator ~(SqlInt16 x)
    {
        if (!x.IsNull)
        {
            return new SqlInt16((short)(~x.m_value));
        }
        return Null;
    }
 
    public static SqlInt16 operator +(SqlInt16 x, SqlInt16 y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        int num = x.m_value + y.m_value;
        if (((uint)((num >> 15) ^ (num >> 16)) & (true ? 1u : 0u)) != 0)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)num);
    }
 
    public static SqlInt16 operator -(SqlInt16 x, SqlInt16 y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        int num = x.m_value - y.m_value;
        if (((uint)((num >> 15) ^ (num >> 16)) & (true ? 1u : 0u)) != 0)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)num);
    }
 
    public static SqlInt16 operator *(SqlInt16 x, SqlInt16 y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        int num = x.m_value * y.m_value;
        int num2 = num & -32768;
        if (num2 != 0 && num2 != -32768)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)num);
    }
 
    public static SqlInt16 operator /(SqlInt16 x, SqlInt16 y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        if (y.m_value != 0)
        {
            if (x.m_value == short.MinValue && y.m_value == -1)
            {
                throw new OverflowException(SQLResource.ArithOverflowMessage);
            }
            return new SqlInt16((short)(x.m_value / y.m_value));
        }
        throw new DivideByZeroException(SQLResource.DivideByZeroMessage);
    }
 
    public static SqlInt16 operator %(SqlInt16 x, SqlInt16 y)
    {
        if (x.IsNull || y.IsNull)
        {
            return Null;
        }
        if (y.m_value != 0)
        {
            if (x.m_value == short.MinValue && y.m_value == -1)
            {
                throw new OverflowException(SQLResource.ArithOverflowMessage);
            }
            return new SqlInt16((short)(x.m_value % y.m_value));
        }
        throw new DivideByZeroException(SQLResource.DivideByZeroMessage);
    }
 
    public static SqlInt16 operator &(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlInt16((short)(x.m_value & y.m_value));
        }
        return Null;
    }
 
    public static SqlInt16 operator |(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlInt16((short)((ushort)x.m_value | (ushort)y.m_value));
        }
        return Null;
    }
 
    public static SqlInt16 operator ^(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlInt16((short)(x.m_value ^ y.m_value));
        }
        return Null;
    }
 
    public static explicit operator SqlInt16(SqlBoolean x)
    {
        if (!x.IsNull)
        {
            return new SqlInt16(x.ByteValue);
        }
        return Null;
    }
 
    public static implicit operator SqlInt16(SqlByte x)
    {
        if (!x.IsNull)
        {
            return new SqlInt16(x.Value);
        }
        return Null;
    }
 
    public static explicit operator SqlInt16(SqlInt32 x)
    {
        if (x.IsNull)
        {
            return Null;
        }
        int value = x.Value;
        if (value > 32767 || value < -32768)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)value);
    }
 
    public static explicit operator SqlInt16(SqlInt64 x)
    {
        if (x.IsNull)
        {
            return Null;
        }
        long value = x.Value;
        if (value > 32767 || value < -32768)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)value);
    }
 
    public static explicit operator SqlInt16(SqlSingle x)
    {
        if (x.IsNull)
        {
            return Null;
        }
        float value = x.Value;
        if (value < -32768f || value > 32767f)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)value);
    }
 
    public static explicit operator SqlInt16(SqlDouble x)
    {
        if (x.IsNull)
        {
            return Null;
        }
        double value = x.Value;
        if (value < -32768.0 || value > 32767.0)
        {
            throw new OverflowException(SQLResource.ArithOverflowMessage);
        }
        return new SqlInt16((short)value);
    }
 
    public static explicit operator SqlInt16(SqlMoney x)
    {
        if (!x.IsNull)
        {
            return new SqlInt16(checked((short)x.ToInt32()));
        }
        return Null;
    }
 
    public static explicit operator SqlInt16(SqlDecimal x)
    {
        return (SqlInt16)(SqlInt32)x;
    }
 
    public static explicit operator SqlInt16(SqlString x)
    {
        if (!x.IsNull)
        {
            return new SqlInt16(short.Parse(x.Value, null));
        }
        return Null;
    }
 
    public static SqlBoolean operator ==(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value == y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator !=(SqlInt16 x, SqlInt16 y)
    {
        return !(x == y);
    }
 
    public static SqlBoolean operator <(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value < y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator >(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value > y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator <=(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value <= y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlBoolean operator >=(SqlInt16 x, SqlInt16 y)
    {
        if (!x.IsNull && !y.IsNull)
        {
            return new SqlBoolean(x.m_value >= y.m_value);
        }
        return SqlBoolean.Null;
    }
 
    public static SqlInt16 OnesComplement(SqlInt16 x)
    {
        return ~x;
    }
 
    public static SqlInt16 Add(SqlInt16 x, SqlInt16 y)
    {
        return x + y;
    }
 
    public static SqlInt16 Subtract(SqlInt16 x, SqlInt16 y)
    {
        return x - y;
    }
 
    public static SqlInt16 Multiply(SqlInt16 x, SqlInt16 y)
    {
        return x * y;
    }
 
    public static SqlInt16 Divide(SqlInt16 x, SqlInt16 y)
    {
        return x / y;
    }
 
    public static SqlInt16 Mod(SqlInt16 x, SqlInt16 y)
    {
        return x % y;
    }
 
    public static SqlInt16 Modulus(SqlInt16 x, SqlInt16 y)
    {
        return x % y;
    }
 
    public static SqlInt16 BitwiseAnd(SqlInt16 x, SqlInt16 y)
    {
        return x & y;
    }
 
    public static SqlInt16 BitwiseOr(SqlInt16 x, SqlInt16 y)
    {
        return x | y;
    }
 
    public static SqlInt16 Xor(SqlInt16 x, SqlInt16 y)
    {
        return x ^ y;
    }
 
    public static SqlBoolean Equals(SqlInt16 x, SqlInt16 y)
    {
        return x == y;
    }
 
    public static SqlBoolean NotEquals(SqlInt16 x, SqlInt16 y)
    {
        return x != y;
    }
 
    public static SqlBoolean LessThan(SqlInt16 x, SqlInt16 y)
    {
        return x < y;
    }
 
    public static SqlBoolean GreaterThan(SqlInt16 x, SqlInt16 y)
    {
        return x > y;
    }
 
    public static SqlBoolean LessThanOrEqual(SqlInt16 x, SqlInt16 y)
    {
        return x <= y;
    }
 
    public static SqlBoolean GreaterThanOrEqual(SqlInt16 x, SqlInt16 y)
    {
        return x >= y;
    }
 
    public SqlBoolean ToSqlBoolean()
    {
        return (SqlBoolean)this;
    }
 
    public SqlByte ToSqlByte()
    {
        return (SqlByte)this;
    }
 
    public SqlDouble ToSqlDouble()
    {
        return this;
    }
 
    public SqlInt32 ToSqlInt32()
    {
        return this;
    }
 
    public SqlInt64 ToSqlInt64()
    {
        return this;
    }
 
    public SqlMoney ToSqlMoney()
    {
        return this;
    }
 
    public SqlDecimal ToSqlDecimal()
    {
        return this;
    }
 
    public SqlSingle ToSqlSingle()
    {
        return this;
    }
 
    public SqlString ToSqlString()
    {
        return (SqlString)this;
    }
 
    public int CompareTo(object? value)
    {
        if (value is SqlInt16 value2)
        {
            return CompareTo(value2);
        }
        throw ADP.WrongType(value.GetType(), typeof(SqlInt16));
    }
 
    public int CompareTo(SqlInt16 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 SqlInt16 sqlInt))
        {
            return false;
        }
        if (sqlInt.IsNull || IsNull)
        {
            if (sqlInt.IsNull)
            {
                return IsNull;
            }
            return false;
        }
        return (this == sqlInt).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.ToInt16(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("short", "http://www.w3.org/2001/XMLSchema");
    }
}