mcs/class/System.Data/System.Data.SqlTypes/SqlDouble.cs

   1 //
   2 // System.Data.SqlTypes.SqlDouble
   3 //
   4 // Author:
   5 //   Tim Coleman <tim@timcoleman.com>
   6 //   Ville Palo <vi64pa@koti.soon.fi>
   7 //
   8 // (C) Copyright 2002 Tim Coleman
   9 //
  10
  11 using System;
  12 using System.Globalization;
  13
  14 namespace System.Data.SqlTypes
  15 {
  16         public struct SqlDouble : INullable, IComparable
  17         {
  18                 #region Fields
  19                 double value;
  20
  21                 private bool notNull;
  22
  23                 public static readonly SqlDouble MaxValue = new SqlDouble (1.7976931348623157E+308);
  24                 public static readonly SqlDouble MinValue = new SqlDouble (-1.7976931348623157E+308);
  25                 public static readonly SqlDouble Null;
  26                 public static readonly SqlDouble Zero = new SqlDouble (0);
  27
  28                 #endregion
  29
  30                 #region Constructors
  31
  32                 public SqlDouble (double value)
  33                 {
  34                         this.value = value;
  35                         notNull = true;
  36                 }
  37
  38                 #endregion
  39
  40                 #region Properties
  41
  42                 public bool IsNull {
  43                         get { return !notNull; }
  44                 }
  45
  46                 public double Value {
  47                         get {
  48                                 if (this.IsNull)
  49                                         throw new SqlNullValueException ();
  50                                 else
  51                                         return value;
  52                         }
  53                 }
  54
  55                 #endregion
  56
  57                 #region Methods
  58
  59                 public static SqlDouble Add (SqlDouble x, SqlDouble y)
  60                 {
  61                         return (x + y);
  62                 }
  63
  64                 public int CompareTo (object value)
  65                 {
  66                         if (value == null)
  67                                 return 1;
  68                         else if (!(value is SqlDouble))
  69                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Data.SqlTypes.SqlDouble"));
  70                         else if (((SqlDouble)value).IsNull)
  71                                 return 1;
  72                         else
  73                                 return this.value.CompareTo (((SqlDouble)value).Value);
  74                 }
  75
  76                 public static SqlDouble Divide (SqlDouble x, SqlDouble y)
  77                 {
  78                         return (x / y);
  79                 }
  80
  81                 public override bool Equals (object value)
  82                 {
  83                         if (!(value is SqlDouble))
  84                                 return false;
  85                         if (this.IsNull && ((SqlDouble)value).IsNull)
  86                                 return true;
  87                         else if (((SqlDouble)value).IsNull)
  88                                 return false;
  89                         else
  90                                 return (bool) (this == (SqlDouble)value);
  91                 }
  92
  93                 public static SqlBoolean Equals (SqlDouble x, SqlDouble y)
  94                 {
  95                         return (x == y);
  96                 }
  97                 public override int GetHashCode ()
  98                 {
  99                         long LongValue = (long)value;
 100                         return (int)(LongValue ^ (LongValue >> 32));
 101
 102                 }
 103
 104                 public static SqlBoolean GreaterThan (SqlDouble x, SqlDouble y)
 105                 {
 106                         return (x > y);
 107                 }
 108
 109                 public static SqlBoolean GreaterThanOrEqual (SqlDouble x, SqlDouble y)
 110                 {
 111                         return (x >= y);
 112                 }
 113
 114                 public static SqlBoolean LessThan (SqlDouble x, SqlDouble y)
 115                 {
 116                         return (x < y);
 117                 }
 118
 119                 public static SqlBoolean LessThanOrEqual (SqlDouble x, SqlDouble y)
 120                 {
 121                         return (x <= y);
 122                 }
 123
 124                 public static SqlDouble Multiply (SqlDouble x, SqlDouble y)
 125                 {
 126                         return (x * y);
 127                 }
 128
 129                 public static SqlBoolean NotEquals (SqlDouble x, SqlDouble y)
 130                 {
 131                         return (x != y);
 132                 }
 133
 134                 public static SqlDouble Parse (string s)
 135                 {
 136                         return new SqlDouble (Double.Parse (s));
 137                 }
 138
 139                 public static SqlDouble Subtract (SqlDouble x, SqlDouble y)
 140                 {
 141                         return (x - y);
 142                 }
 143
 144                 public SqlBoolean ToSqlBoolean ()
 145                 {
 146                         return ((SqlBoolean)this);
 147                 }
 148
 149                 public SqlByte ToSqlByte ()
 150                 {
 151                         return ((SqlByte)this);
 152                 }
 153
 154                 public SqlDecimal ToSqlDecimal ()
 155                 {
 156                         return ((SqlDecimal)this);
 157                 }
 158
 159                 public SqlInt16 ToSqlInt16 ()
 160                 {
 161                         return ((SqlInt16)this);
 162                 }
 163
 164                 public SqlInt32 ToSqlInt32 ()
 165                 {
 166                         return ((SqlInt32)this);
 167                 }
 168
 169                 public SqlInt64 ToSqlInt64 ()
 170                 {
 171                         return ((SqlInt64)this);
 172                 }
 173
 174                 public SqlMoney ToSqlMoney ()
 175                 {
 176                         return ((SqlMoney)this);
 177                 }
 178
 179                 public SqlSingle ToSqlSingle ()
 180                 {
 181                         return ((SqlSingle)this);
 182                 }
 183
 184                 public SqlString ToSqlString ()
 185                 {
 186                         return ((SqlString)this);
 187                 }
 188
 189                 public override string ToString ()
 190                 {
 191                         if (this.IsNull)
 192                                 return String.Empty;
 193                         else
 194                                 return value.ToString ();
 195                 }
 196
 197                 public static SqlDouble operator + (SqlDouble x, SqlDouble y)
 198                 {
 199                         checked {
 200                                 return new SqlDouble (x.Value + y.Value);
 201                         }
 202                 }
 203
 204                 public static SqlDouble operator / (SqlDouble x, SqlDouble y)
 205                 {
 206                         checked {
 207                                 return new SqlDouble (x.Value / y.Value);
 208                         }
 209                 }
 210
 211                 public static SqlBoolean operator == (SqlDouble x, SqlDouble y)
 212                 {
 213                         if (x.IsNull || y.IsNull)
 214                                 return SqlBoolean.Null;
 215                         else
 216                                 return new SqlBoolean (x.Value == y.Value);
 217                 }
 218
 219                 public static SqlBoolean operator > (SqlDouble x, SqlDouble y)
 220                 {
 221                         if (x.IsNull || y.IsNull)
 222                                 return SqlBoolean.Null;
 223                         else
 224                                 return new SqlBoolean (x.Value > y.Value);
 225                 }
 226
 227                 public static SqlBoolean operator >= (SqlDouble x, SqlDouble y)
 228                 {
 229                         if (x.IsNull || y.IsNull)
 230                                 return SqlBoolean.Null;
 231                         else
 232                                 return new SqlBoolean (x.Value >= y.Value);
 233                 }
 234
 235                 public static SqlBoolean operator != (SqlDouble x, SqlDouble y)
 236                 {
 237                         if (x.IsNull || y.IsNull)
 238                                 return SqlBoolean.Null;
 239                         else
 240                                 return new SqlBoolean (!(x.Value == y.Value));
 241                 }
 242
 243                 public static SqlBoolean operator < (SqlDouble x, SqlDouble y)
 244                 {
 245                         if (x.IsNull || y.IsNull)
 246                                 return SqlBoolean.Null;
 247                         else
 248                                 return new SqlBoolean (x.Value < y.Value);
 249                 }
 250
 251                 public static SqlBoolean operator <= (SqlDouble x, SqlDouble y)
 252                 {
 253                         if (x.IsNull || y.IsNull)
 254                                 return SqlBoolean.Null;
 255                         else
 256                                 return new SqlBoolean (x.Value <= y.Value);
 257                 }
 258
 259                 public static SqlDouble operator * (SqlDouble x, SqlDouble y)
 260                 {
 261                         checked {
 262                                 return new SqlDouble (x.Value * y.Value);
 263                         }
 264                 }
 265
 266                 public static SqlDouble operator - (SqlDouble x, SqlDouble y)
 267                 {
 268                         checked {
 269                                 return new SqlDouble (x.Value - y.Value);
 270                         }
 271                 }
 272
 273                 public static SqlDouble operator - (SqlDouble n)
 274                 {
 275                         return new SqlDouble (-(n.Value));
 276                 }
 277
 278                 public static explicit operator SqlDouble (SqlBoolean x)
 279                 {
 280                         if (x.IsNull)
 281                                 return Null;
 282                         else
 283                                 return new SqlDouble ((double)x.ByteValue);
 284                 }
 285
 286                 public static explicit operator double (SqlDouble x)
 287                 {
 288                         return x.Value;
 289                 }
 290
 291                 public static explicit operator SqlDouble (SqlString x)
 292                 {
 293                         checked {
 294                                 return SqlDouble.Parse (x.Value);
 295                         }
 296                 }
 297
 298                 public static implicit operator SqlDouble (double x)
 299                 {
 300                         return new SqlDouble (x);
 301                 }
 302
 303                 public static implicit operator SqlDouble (SqlByte x)
 304                 {
 305                         if (x.IsNull)
 306                                 return Null;
 307                         else
 308                                 return new SqlDouble ((double)x.Value);
 309                 }
 310
 311                 public static implicit operator SqlDouble (SqlDecimal x)
 312                 {
 313                         if (x.IsNull)
 314                                 return Null;
 315                         else
 316                                 return new SqlDouble (x.ToDouble ());
 317                 }
 318
 319                 public static implicit operator SqlDouble (SqlInt16 x)
 320                 {
 321                         if (x.IsNull)
 322                                 return Null;
 323                         else
 324                                 return new SqlDouble ((double)x.Value);
 325                 }
 326
 327                 public static implicit operator SqlDouble (SqlInt32 x)
 328                 {
 329                         if (x.IsNull)
 330                                 return Null;
 331                         else
 332                                 return new SqlDouble ((double)x.Value);
 333                 }
 334
 335                 public static implicit operator SqlDouble (SqlInt64 x)
 336                 {
 337                         if (x.IsNull)
 338                                 return Null;
 339                         else
 340                                 return new SqlDouble ((double)x.Value);
 341                 }
 342
 343                 public static implicit operator SqlDouble (SqlMoney x)
 344                 {
 345                         if (x.IsNull)
 346                                 return Null;
 347                         else
 348                                 return new SqlDouble ((double)x.Value);
 349                 }
 350
 351                 public static implicit operator SqlDouble (SqlSingle x)
 352                 {
 353                         if (x.IsNull)
 354                                 return Null;
 355                         else
 356                                 return new SqlDouble ((double)x.Value);
 357                 }
 358
 359                 #endregion
 360         }
 361 }
 362