Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / SQLTypes / SQLInt64.cs / 1 / SQLInt64.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //junfang //[....] //[....] //----------------------------------------------------------------------------- //************************************************************************* // @File: SqlInt64.cs // // Create by: JunFang // // Purpose: Implementation of SqlInt64 which is equivalent to // data type "bigint" in SQL Server // // Notes: // // History: // // 10/28/99 JunFang Created. // // @EndHeader@ //************************************************************************* using System; using System.Data.Common; using System.Runtime.InteropServices; using System.Globalization; using System.Xml; using System.Xml.Schema; using System.Xml.Serialization; namespace System.Data.SqlTypes { ////// [Serializable] [StructLayout(LayoutKind.Sequential)] [XmlSchemaProvider("GetXsdType")] public struct SqlInt64 : INullable, IComparable, IXmlSerializable { private bool m_fNotNull; // false if null private long m_value; private static readonly long x_lLowIntMask = 0xffffffff; private static readonly long x_lHighIntMask = unchecked((long)0xffffffff00000000); // constructor // construct a Null private SqlInt64(bool fNull) { m_fNotNull = false; m_value = 0; } ////// Represents a 64-bit signed integer to be stored in /// or retrieved from a database. /// ////// public SqlInt64(long value) { m_value = value; m_fNotNull = true; } // INullable ///[To be supplied.] ////// public bool IsNull { get { return !m_fNotNull;} } // property: Value ///[To be supplied.] ////// public long Value { get { if (m_fNotNull) return m_value; else throw new SqlNullValueException(); } } // Implicit conversion from long to SqlInt64 ///[To be supplied.] ////// public static implicit operator SqlInt64(long x) { return new SqlInt64(x); } // Explicit conversion from SqlInt64 to long. Throw exception if x is Null. ///[To be supplied.] ////// public static explicit operator long(SqlInt64 x) { return x.Value; } ///[To be supplied.] ////// public override String ToString() { return IsNull ? SQLResource.NullString : m_value.ToString((IFormatProvider)null); } ///[To be supplied.] ////// public static SqlInt64 Parse(String s) { if (s == SQLResource.NullString) return SqlInt64.Null; else return new SqlInt64(Int64.Parse(s, (IFormatProvider)null)); } // Unary operators ///[To be supplied.] ////// public static SqlInt64 operator -(SqlInt64 x) { return x.IsNull ? Null : new SqlInt64(-x.m_value); } ///[To be supplied.] ////// public static SqlInt64 operator ~(SqlInt64 x) { return x.IsNull ? Null : new SqlInt64(~x.m_value); } // Binary operators // Arithmetic operators ///[To be supplied.] ////// public static SqlInt64 operator +(SqlInt64 x, SqlInt64 y) { if (x.IsNull || y.IsNull) return Null; long lResult = x.m_value + y.m_value; if (SameSignLong(x.m_value, y.m_value) && !SameSignLong(x.m_value, lResult)) throw new OverflowException(SQLResource.ArithOverflowMessage); else return new SqlInt64(lResult); } ///[To be supplied.] ////// public static SqlInt64 operator -(SqlInt64 x, SqlInt64 y) { if (x.IsNull || y.IsNull) return Null; long lResult = x.m_value - y.m_value; if (!SameSignLong(x.m_value, y.m_value) && SameSignLong(y.m_value, lResult)) throw new OverflowException(SQLResource.ArithOverflowMessage); else return new SqlInt64(lResult); } ///[To be supplied.] ////// public static SqlInt64 operator *(SqlInt64 x, SqlInt64 y) { if (x.IsNull || y.IsNull) return Null; bool fNeg = false; long lOp1 = x.m_value; long lOp2 = y.m_value; long lResult; long lPartialResult = 0; if (lOp1 < 0) { fNeg = true; lOp1 = - lOp1; } if (lOp2 < 0) { fNeg = !fNeg; lOp2 = - lOp2; } long lLow1 = lOp1 & x_lLowIntMask; long lHigh1 = (lOp1 >> 32) & x_lLowIntMask; long lLow2 = lOp2 & x_lLowIntMask; long lHigh2 = (lOp2 >> 32) & x_lLowIntMask; // if both of the high order dwords are non-zero then overflow results if (lHigh1 != 0 && lHigh2 != 0) throw new OverflowException(SQLResource.ArithOverflowMessage); lResult = lLow1 * lLow2; if (lResult < 0) throw new OverflowException(SQLResource.ArithOverflowMessage); if (lHigh1 != 0) { SQLDebug.Check(lHigh2 == 0); lPartialResult = lHigh1 * lLow2; if (lPartialResult < 0 || lPartialResult > Int64.MaxValue) throw new OverflowException(SQLResource.ArithOverflowMessage); } else if (lHigh2 != 0) { SQLDebug.Check(lHigh1 == 0); lPartialResult = lLow1 * lHigh2; if (lPartialResult < 0 || lPartialResult > Int64.MaxValue) throw new OverflowException(SQLResource.ArithOverflowMessage); } lResult += lPartialResult << 32; if (lResult < 0) throw new OverflowException(SQLResource.ArithOverflowMessage); if (fNeg) lResult = - lResult; return new SqlInt64(lResult); } ///[To be supplied.] ////// public static SqlInt64 operator /(SqlInt64 x, SqlInt64 y) { if (x.IsNull || y.IsNull) return Null; if (y.m_value != 0) { if ((x.m_value == Int64.MinValue) && (y.m_value == -1)) throw new OverflowException(SQLResource.ArithOverflowMessage); return new SqlInt64(x.m_value / y.m_value); } else throw new DivideByZeroException(SQLResource.DivideByZeroMessage); } ///[To be supplied.] ////// public static SqlInt64 operator %(SqlInt64 x, SqlInt64 y) { if (x.IsNull || y.IsNull) return Null; if (y.m_value != 0) { if ((x.m_value == Int64.MinValue) && (y.m_value == -1)) throw new OverflowException(SQLResource.ArithOverflowMessage); return new SqlInt64(x.m_value % y.m_value); } else throw new DivideByZeroException(SQLResource.DivideByZeroMessage); } // Bitwise operators ///[To be supplied.] ////// public static SqlInt64 operator &(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? Null : new SqlInt64(x.m_value & y.m_value); } ///[To be supplied.] ////// public static SqlInt64 operator |(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? Null : new SqlInt64(x.m_value | y.m_value); } ///[To be supplied.] ////// public static SqlInt64 operator ^(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? Null : new SqlInt64(x.m_value ^ y.m_value); } // Implicit conversions // Implicit conversion from SqlBoolean to SqlInt64 ///[To be supplied.] ////// public static explicit operator SqlInt64(SqlBoolean x) { return x.IsNull ? Null : new SqlInt64((long)x.ByteValue); } // Implicit conversion from SqlByte to SqlInt64 ///[To be supplied.] ////// public static implicit operator SqlInt64(SqlByte x) { return x.IsNull ? Null : new SqlInt64((long)(x.Value)); } // Implicit conversion from SqlInt16 to SqlInt64 ///[To be supplied.] ////// public static implicit operator SqlInt64(SqlInt16 x) { return x.IsNull ? Null : new SqlInt64((long)(x.Value)); } // Implicit conversion from SqlInt32 to SqlInt64 ///[To be supplied.] ////// public static implicit operator SqlInt64(SqlInt32 x) { return x.IsNull ? Null : new SqlInt64((long)(x.Value)); } // Explicit conversions // Explicit conversion from SqlSingle to SqlInt64 ///[To be supplied.] ////// public static explicit operator SqlInt64(SqlSingle x) { if (x.IsNull) return Null; float value = x.Value; if (value > (float)Int64.MaxValue || value < (float)Int64.MinValue) throw new OverflowException(SQLResource.ArithOverflowMessage); else return new SqlInt64((long)value); } // Explicit conversion from SqlDouble to SqlInt64 ///[To be supplied.] ////// public static explicit operator SqlInt64(SqlDouble x) { if (x.IsNull) return Null; double value = x.Value; if (value > (double)Int64.MaxValue || value < (double)Int64.MinValue) throw new OverflowException(SQLResource.ArithOverflowMessage); else return new SqlInt64((long)value); } // Explicit conversion from SqlMoney to SqlInt64 ///[To be supplied.] ////// public static explicit operator SqlInt64(SqlMoney x) { return x.IsNull ? Null : new SqlInt64(x.ToInt64()); } // Explicit conversion from SqlDecimal to SqlInt64 ///[To be supplied.] ////// public static explicit operator SqlInt64(SqlDecimal x) { if (x.IsNull) return SqlInt64.Null; SqlDecimal ssnumTemp = x; long llRetVal; // Throw away decimal portion ssnumTemp.AdjustScale (-ssnumTemp.m_bScale, false); // More than 8 bytes of data will always overflow if (ssnumTemp.m_bLen > 2) throw new OverflowException(SQLResource.ConversionOverflowMessage); // If 8 bytes of data, see if fits in LONGLONG if (ssnumTemp.m_bLen == 2) { ulong dwl = SqlDecimal.DWL(ssnumTemp.m_data1, ssnumTemp.m_data2); if (dwl > SqlDecimal.x_llMax && (ssnumTemp.IsPositive || dwl != 1 + SqlDecimal.x_llMax)) throw new OverflowException(SQLResource.ConversionOverflowMessage); llRetVal = (long) dwl; } // 4 bytes of data always fits in a LONGLONG else llRetVal = (long) ssnumTemp.m_data1; //negate result if ssnumTemp negative if (!ssnumTemp.IsPositive) llRetVal = -llRetVal; return new SqlInt64(llRetVal); } // Explicit conversion from SqlString to SqlInt // Throws FormatException or OverflowException if necessary. ///[To be supplied.] ////// public static explicit operator SqlInt64(SqlString x) { return x.IsNull ? Null : new SqlInt64(Int64.Parse(x.Value, (IFormatProvider)null)); } // Utility functions private static bool SameSignLong(long x, long y) { return((x ^ y) & unchecked((long)0x8000000000000000L)) == 0; } // Overloading comparison operators ///[To be supplied.] ////// public static SqlBoolean operator==(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? SqlBoolean.Null : new SqlBoolean(x.m_value == y.m_value); } ///[To be supplied.] ////// public static SqlBoolean operator!=(SqlInt64 x, SqlInt64 y) { return ! (x == y); } ///[To be supplied.] ////// public static SqlBoolean operator<(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? SqlBoolean.Null : new SqlBoolean(x.m_value < y.m_value); } ///[To be supplied.] ////// public static SqlBoolean operator>(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? SqlBoolean.Null : new SqlBoolean(x.m_value > y.m_value); } ///[To be supplied.] ////// public static SqlBoolean operator<=(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? SqlBoolean.Null : new SqlBoolean(x.m_value <= y.m_value); } ///[To be supplied.] ////// public static SqlBoolean operator>=(SqlInt64 x, SqlInt64 y) { return(x.IsNull || y.IsNull) ? SqlBoolean.Null : new SqlBoolean(x.m_value >= y.m_value); } //-------------------------------------------------- // Alternative methods for overloaded operators //-------------------------------------------------- // Alternative method for operator ~ public static SqlInt64 OnesComplement(SqlInt64 x) { return ~x; } // Alternative method for operator + public static SqlInt64 Add(SqlInt64 x, SqlInt64 y) { return x + y; } // Alternative method for operator - public static SqlInt64 Subtract(SqlInt64 x, SqlInt64 y) { return x - y; } // Alternative method for operator * public static SqlInt64 Multiply(SqlInt64 x, SqlInt64 y) { return x * y; } // Alternative method for operator / public static SqlInt64 Divide(SqlInt64 x, SqlInt64 y) { return x / y; } // Alternative method for operator % public static SqlInt64 Mod(SqlInt64 x, SqlInt64 y) { return x % y; } public static SqlInt64 Modulus(SqlInt64 x, SqlInt64 y) { return x % y; } // Alternative method for operator & public static SqlInt64 BitwiseAnd(SqlInt64 x, SqlInt64 y) { return x & y; } // Alternative method for operator | public static SqlInt64 BitwiseOr(SqlInt64 x, SqlInt64 y) { return x | y; } // Alternative method for operator ^ public static SqlInt64 Xor(SqlInt64 x, SqlInt64 y) { return x ^ y; } // Alternative method for operator == public static SqlBoolean Equals(SqlInt64 x, SqlInt64 y) { return (x == y); } // Alternative method for operator != public static SqlBoolean NotEquals(SqlInt64 x, SqlInt64 y) { return (x != y); } // Alternative method for operator < public static SqlBoolean LessThan(SqlInt64 x, SqlInt64 y) { return (x < y); } // Alternative method for operator > public static SqlBoolean GreaterThan(SqlInt64 x, SqlInt64 y) { return (x > y); } // Alternative method for operator <= public static SqlBoolean LessThanOrEqual(SqlInt64 x, SqlInt64 y) { return (x <= y); } // Alternative method for operator >= public static SqlBoolean GreaterThanOrEqual(SqlInt64 x, SqlInt64 y) { return (x >= y); } // Alternative method for conversions. public SqlBoolean ToSqlBoolean() { return (SqlBoolean)this; } public SqlByte ToSqlByte() { return (SqlByte)this; } public SqlDouble ToSqlDouble() { return (SqlDouble)this; } public SqlInt16 ToSqlInt16() { return (SqlInt16)this; } public SqlInt32 ToSqlInt32() { return (SqlInt32)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; } // IComparable // Compares this object to another object, returning an integer that // indicates the relationship. // Returns a value less than zero if this < object, zero if this = object, // or a value greater than zero if this > object. // null is considered to be less than any instance. // If object is not of same type, this method throws an ArgumentException. ///[To be supplied.] ////// public int CompareTo(Object value) { if (value is SqlInt64) { SqlInt64 i = (SqlInt64)value; return CompareTo(i); } throw ADP.WrongType(value.GetType(), typeof(SqlInt64)); } public int CompareTo(SqlInt64 value) { // If both Null, consider them equal. // Otherwise, Null is less than anything. if (IsNull) return value.IsNull ? 0 : -1; else if (value.IsNull) return 1; if (this < value) return -1; if (this > value) return 1; return 0; } // Compares this instance with a specified object ///[To be supplied.] ////// public override bool Equals(Object value) { if (!(value is SqlInt64)) { return false; } SqlInt64 i = (SqlInt64)value; if (i.IsNull || IsNull) return (i.IsNull && IsNull); else return (this == i).Value; } // For hashing purpose ///[To be supplied.] ////// public override int GetHashCode() { return IsNull ? 0 : Value.GetHashCode(); } ///[To be supplied.] ////// XmlSchema IXmlSerializable.GetSchema() { return null; } ///[To be supplied.] ////// void IXmlSerializable.ReadXml(XmlReader reader) { string isNull = reader.GetAttribute("nil", XmlSchema.InstanceNamespace); if (isNull != null && XmlConvert.ToBoolean(isNull)) { m_fNotNull = false; } else { m_value = XmlConvert.ToInt64(reader.ReadElementString()); m_fNotNull = true; } } ///[To be supplied.] ////// void IXmlSerializable.WriteXml(XmlWriter writer) { if (IsNull) { writer.WriteAttributeString("xsi", "nil", XmlSchema.InstanceNamespace, "true"); } else { writer.WriteString(XmlConvert.ToString(m_value)); } } ///[To be supplied.] ////// public static XmlQualifiedName GetXsdType(XmlSchemaSet schemaSet) { return new XmlQualifiedName("long", XmlSchema.Namespace); } ///[To be supplied.] ////// public static readonly SqlInt64 Null = new SqlInt64(true); ///[To be supplied.] ////// public static readonly SqlInt64 Zero = new SqlInt64(0); ///[To be supplied.] ////// public static readonly SqlInt64 MinValue = new SqlInt64(Int64.MinValue); ///[To be supplied.] ////// public static readonly SqlInt64 MaxValue = new SqlInt64(Int64.MaxValue); } // SqlInt64 } // namespace System.Data.SqlTypes // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.[To be supplied.] ///
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