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

   1 //
   2 // System.Data.SqlTypes.SqlSingle
   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 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Xml;
  36 using System.Xml.Schema;
  37 using System.Globalization;
  38 using System.Xml.Serialization;
  39
  40 namespace System.Data.SqlTypes
  41 {
  42 #if NET_2_0
  43         [SerializableAttribute]
  44         [XmlSchemaProvider ("GetSchema")]
  45 #endif
  46         public struct SqlSingle : INullable, IComparable
  47 #if NET_2_0
  48                                 , IXmlSerializable
  49 #endif
  50         {
  51                 #region Fields
  52
  53                 float value;
  54
  55                 private bool notNull;
  56
  57                 public static readonly SqlSingle MaxValue = new SqlSingle (3.40282346638528859E+38f);
  58                 public static readonly SqlSingle MinValue = new SqlSingle (-3.40282346638528859E+38f);
  59                 public static readonly SqlSingle Null;
  60                 public static readonly SqlSingle Zero = new SqlSingle (0);
  61
  62                 #endregion
  63
  64                 #region Constructors
  65
  66                 public SqlSingle (double value)
  67                 {
  68                         this.value = (float)value;
  69                         notNull = true;
  70                 }
  71
  72                 public SqlSingle (float value)
  73                 {
  74                         this.value = value;
  75                         notNull = true;
  76                 }
  77
  78                 #endregion
  79
  80                 #region Properties
  81
  82                 public bool IsNull {
  83                         get { return !notNull; }
  84                 }
  85
  86                 public float Value {
  87                         get {
  88                                 if (this.IsNull)
  89                                         throw new SqlNullValueException ();
  90                                 else
  91                                         return value;
  92                         }
  93                 }
  94
  95                 #endregion
  96
  97                 #region Methods
  98
  99                 public static SqlSingle Add (SqlSingle x, SqlSingle y)
 100                 {
 101                         return (x + y);
 102                 }
 103
 104                 public int CompareTo (object value)
 105                 {
 106                         if (value == null)
 107                                 return 1;
 108                         else if (!(value is SqlSingle))
 109                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Data.SqlTypes.SqlSingle"));
 110
 111                         return CompareSqlSingle ((SqlSingle) value);
 112                 }
 113
 114                 #if NET_2_0
 115                 public int CompareTo (SqlSingle value)
 116                 {
 117                         return CompareSqlSingle (value);
 118                 }
 119                 #endif
 120
 121                 private int CompareSqlSingle (SqlSingle value)
 122                 {
 123                         if (value.IsNull)
 124                                 return 1;
 125                         else
 126                                 return this.value.CompareTo (value.Value);
 127                 }
 128
 129                 public static SqlSingle Divide (SqlSingle x, SqlSingle y)
 130                 {
 131                         return (x / y);
 132                 }
 133
 134                 public override bool Equals (object value)
 135                 {
 136                         if (!(value is SqlSingle))
 137                                 return false;
 138                         else if (this.IsNull && ((SqlSingle)value).IsNull)
 139                                 return true;
 140                         else if (((SqlSingle)value).IsNull)
 141                                 return false;
 142                         else
 143                                 return (bool) (this == (SqlSingle)value);
 144                 }
 145
 146                 public static SqlBoolean Equals (SqlSingle x, SqlSingle y)
 147                 {
 148                         return (x == y);
 149                 }
 150
 151                 public override int GetHashCode ()
 152                 {
 153                         long LongValue = (long) value;
 154                         return (int)(LongValue ^ (LongValue >> 32));
 155                 }
 156
 157                 public static SqlBoolean GreaterThan (SqlSingle x, SqlSingle y)
 158                 {
 159                         return (x > y);
 160                 }
 161
 162                 public static SqlBoolean GreaterThanOrEqual (SqlSingle x, SqlSingle y)
 163                 {
 164                         return (x >= y);
 165                 }
 166
 167                 public static SqlBoolean LessThan (SqlSingle x, SqlSingle y)
 168                 {
 169                         return (x < y);
 170                 }
 171
 172                 public static SqlBoolean LessThanOrEqual (SqlSingle x, SqlSingle y)
 173                 {
 174                         return (x <= y);
 175                 }
 176
 177                 public static SqlSingle Multiply (SqlSingle x, SqlSingle y)
 178                 {
 179                         return (x * y);
 180                 }
 181
 182                 public static SqlBoolean NotEquals (SqlSingle x, SqlSingle y)
 183                 {
 184                         return (x != y);
 185                 }
 186
 187                 public static SqlSingle Parse (string s)
 188                 {
 189                         return new SqlSingle (Single.Parse (s));
 190                 }
 191
 192                 public static SqlSingle Subtract (SqlSingle x, SqlSingle y)
 193                 {
 194                         return (x - y);
 195                 }
 196
 197                 public SqlBoolean ToSqlBoolean ()
 198                 {
 199                         return ((SqlBoolean)this);
 200                 }
 201
 202                 public SqlByte ToSqlByte ()
 203                 {
 204                         return ((SqlByte)this);
 205                 }
 206
 207                 public SqlDecimal ToSqlDecimal ()
 208                 {
 209                         return ((SqlDecimal)this);
 210                 }
 211
 212                 public SqlDouble ToSqlDouble ()
 213                 {
 214                         return ((SqlDouble)this);
 215                 }
 216
 217                 public SqlInt16 ToSqlInt16 ()
 218                 {
 219                         return ((SqlInt16)this);
 220                 }
 221
 222                 public SqlInt32 ToSqlInt32 ()
 223                 {
 224                         return ((SqlInt32)this);
 225                 }
 226
 227                 public SqlInt64 ToSqlInt64 ()
 228                 {
 229                         return ((SqlInt64)this);
 230                 }
 231
 232                 public SqlMoney ToSqlMoney ()
 233                 {
 234                         return ((SqlMoney)this);
 235                 }
 236
 237
 238                 public SqlString ToSqlString ()
 239                 {
 240                         return ((SqlString)this);
 241                 }
 242
 243                 public override string ToString ()
 244                 {
 245                         if (!notNull)
 246                                 return "Null";
 247                         return value.ToString ();
 248                 }
 249
 250                 public static SqlSingle operator + (SqlSingle x, SqlSingle y)
 251                 {
 252                         float f = (float)(x.Value + y.Value);
 253
 254                         if (Single.IsInfinity (f))
 255                                 throw new OverflowException ();
 256
 257                         return new SqlSingle (f);
 258                 }
 259
 260                 public static SqlSingle operator / (SqlSingle x, SqlSingle y)
 261                 {
 262                         float f = (float)(x.Value / y.Value);
 263
 264                         if (Single.IsInfinity (f)) {
 265
 266                                 if (y.Value == 0d)
 267                                         throw new DivideByZeroException ();
 268                         }
 269
 270                         return new SqlSingle (x.Value / y.Value);
 271                 }
 272
 273                 public static SqlBoolean operator == (SqlSingle x, SqlSingle y)
 274                 {
 275                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 276                         return new SqlBoolean (x.Value == y.Value);
 277                 }
 278
 279                 public static SqlBoolean operator > (SqlSingle x, SqlSingle y)
 280                 {
 281                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 282                         return new SqlBoolean (x.Value > y.Value);
 283                 }
 284
 285                 public static SqlBoolean operator >= (SqlSingle x, SqlSingle y)
 286                 {
 287                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 288                         return new SqlBoolean (x.Value >= y.Value);
 289                 }
 290
 291                 public static SqlBoolean operator != (SqlSingle x, SqlSingle y)
 292                 {
 293                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 294                         return new SqlBoolean (!(x.Value == y.Value));
 295                 }
 296
 297                 public static SqlBoolean operator < (SqlSingle x, SqlSingle y)
 298                 {
 299                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 300                         return new SqlBoolean (x.Value < y.Value);
 301                 }
 302
 303                 public static SqlBoolean operator <= (SqlSingle x, SqlSingle y)
 304                 {
 305                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 306                         return new SqlBoolean (x.Value <= y.Value);
 307                 }
 308
 309                 public static SqlSingle operator * (SqlSingle x, SqlSingle y)
 310                 {
 311                         float f = (float)(x.Value * y.Value);
 312
 313                         if (Single.IsInfinity (f))
 314                                 throw new OverflowException ();
 315
 316                         return new SqlSingle (f);
 317                 }
 318
 319                 public static SqlSingle operator - (SqlSingle x, SqlSingle y)
 320                 {
 321                         float f = (float)(x.Value - y.Value);
 322
 323                         if (Single.IsInfinity (f))
 324                                 throw new OverflowException ();
 325
 326                         return new SqlSingle (f);
 327                 }
 328
 329                 public static SqlSingle operator - (SqlSingle n)
 330                 {
 331                         return new SqlSingle (-(n.Value));
 332                 }
 333
 334                 public static explicit operator SqlSingle (SqlBoolean x)
 335                 {
 336                         checked {
 337                                 if (x.IsNull)
 338                                         return Null;
 339
 340                                 return new SqlSingle((float)x.ByteValue);
 341                         }
 342                 }
 343
 344                 public static explicit operator SqlSingle (SqlDouble x)
 345                 {
 346                         if (x.IsNull)
 347                                 return Null;
 348
 349                         float f = (float)x.Value;
 350
 351                         if (Single.IsInfinity (f))
 352                                 throw new OverflowException ();
 353
 354                         return new SqlSingle(f);
 355                 }
 356
 357                 public static explicit operator float (SqlSingle x)
 358                 {
 359                         return x.Value;
 360                 }
 361
 362                 public static explicit operator SqlSingle (SqlString x)
 363                 {
 364                         checked {
 365                                 if (x.IsNull)
 366                                         return Null;
 367
 368                                 return SqlSingle.Parse (x.Value);
 369                         }
 370                 }
 371
 372                 public static implicit operator SqlSingle (float x)
 373                 {
 374                         return new SqlSingle (x);
 375                 }
 376
 377                 public static implicit operator SqlSingle (SqlByte x)
 378                 {
 379                         if (x.IsNull)
 380                                 return Null;
 381                         else
 382                                 return new SqlSingle((float)x.Value);
 383                 }
 384
 385                 public static implicit operator SqlSingle (SqlDecimal x)
 386                 {
 387                         if (x.IsNull)
 388                                 return Null;
 389                         else
 390                                 return new SqlSingle((float)x.Value);
 391                 }
 392
 393                 public static implicit operator SqlSingle (SqlInt16 x)
 394                 {
 395                         if (x.IsNull)
 396                                 return Null;
 397                         else
 398                                 return new SqlSingle((float)x.Value);
 399                 }
 400
 401                 public static implicit operator SqlSingle (SqlInt32 x)
 402                 {
 403                         if (x.IsNull)
 404                                 return Null;
 405                         else
 406                                 return new SqlSingle((float)x.Value);
 407                 }
 408
 409                 public static implicit operator SqlSingle (SqlInt64 x)
 410                 {
 411                         if (x.IsNull)
 412                                 return Null;
 413                         else
 414                                 return new SqlSingle((float)x.Value);
 415                 }
 416
 417                 public static implicit operator SqlSingle (SqlMoney x)
 418                 {
 419                         if (x.IsNull)
 420                                 return Null;
 421                         else
 422                                 return new SqlSingle((float)x.Value);
 423                 }
 424
 425 #if NET_2_0
 426                 [MonoTODO]
 427                 XmlSchema IXmlSerializable.GetSchema ()
 428                 {
 429                         throw new NotImplementedException ();
 430                 }
 431
 432                 [MonoTODO]
 433                 void IXmlSerializable.ReadXml (XmlReader reader)
 434                 {
 435                         throw new NotImplementedException ();
 436                 }
 437
 438                 [MonoTODO]
 439                 void IXmlSerializable.WriteXml (XmlWriter writer)
 440                 {
 441                         throw new NotImplementedException ();
 442                 }
 443 #endif
 444                 #endregion
 445         }
 446 }
 447