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 ("GetXsdType")]
  45 #endif
  46         public struct SqlSingle : INullable, IComparable
  47 #if NET_2_0
  48                                 , IXmlSerializable
  49 #endif
  50         {
  51                 #region Fields
  52
  53                 private float value;
  54                 private bool notNull;
  55
  56                 public static readonly SqlSingle MaxValue = new SqlSingle (3.40282346638528859E+38f);
  57                 public static readonly SqlSingle MinValue = new SqlSingle (-3.40282346638528859E+38f);
  58                 public static readonly SqlSingle Null;
  59                 public static readonly SqlSingle Zero = new SqlSingle (0);
  60
  61                 #endregion
  62
  63                 #region Constructors
  64
  65                 public SqlSingle (double value)
  66                 {
  67                         this.value = (float)value;
  68                         notNull = true;
  69                 }
  70
  71                 public SqlSingle (float value)
  72                 {
  73                         this.value = value;
  74                         notNull = true;
  75                 }
  76
  77                 #endregion
  78
  79                 #region Properties
  80
  81                 public bool IsNull {
  82                         get { return !notNull; }
  83                 }
  84
  85                 public float Value {
  86                         get {
  87                                 if (this.IsNull)
  88                                         throw new SqlNullValueException ();
  89                                 else
  90                                         return value;
  91                         }
  92                 }
  93
  94                 #endregion
  95
  96                 #region Methods
  97
  98                 public static SqlSingle Add (SqlSingle x, SqlSingle y)
  99                 {
 100                         return (x + y);
 101                 }
 102
 103                 public int CompareTo (object value)
 104                 {
 105                         if (value == null)
 106                                 return 1;
 107                         else if (!(value is SqlSingle))
 108                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Data.SqlTypes.SqlSingle"));
 109
 110                         return CompareSqlSingle ((SqlSingle) value);
 111                 }
 112
 113 #if NET_2_0
 114                 public int CompareTo (SqlSingle value)
 115                 {
 116                         return CompareSqlSingle (value);
 117                 }
 118 #endif
 119
 120                 private int CompareSqlSingle (SqlSingle value)
 121                 {
 122                         if (value.IsNull)
 123                                 return 1;
 124                         else
 125                                 return this.value.CompareTo (value.Value);
 126                 }
 127
 128                 public static SqlSingle Divide (SqlSingle x, SqlSingle y)
 129                 {
 130                         return (x / y);
 131                 }
 132
 133                 public override bool Equals (object value)
 134                 {
 135                         if (!(value is SqlSingle))
 136                                 return false;
 137                         else if (this.IsNull)
 138                                 return ((SqlSingle)value).IsNull;
 139                         else if (((SqlSingle)value).IsNull)
 140                                 return false;
 141                         else
 142                                 return (bool) (this == (SqlSingle)value);
 143                 }
 144
 145                 public static SqlBoolean Equals (SqlSingle x, SqlSingle y)
 146                 {
 147                         return (x == y);
 148                 }
 149
 150                 public override int GetHashCode ()
 151                 {
 152                         long LongValue = (long) value;
 153                         return (int) (LongValue ^ (LongValue >> 32));
 154                 }
 155
 156                 public static SqlBoolean GreaterThan (SqlSingle x, SqlSingle y)
 157                 {
 158                         return (x > y);
 159                 }
 160
 161                 public static SqlBoolean GreaterThanOrEqual (SqlSingle x, SqlSingle y)
 162                 {
 163                         return (x >= y);
 164                 }
 165
 166                 public static SqlBoolean LessThan (SqlSingle x, SqlSingle y)
 167                 {
 168                         return (x < y);
 169                 }
 170
 171                 public static SqlBoolean LessThanOrEqual (SqlSingle x, SqlSingle y)
 172                 {
 173                         return (x <= y);
 174                 }
 175
 176                 public static SqlSingle Multiply (SqlSingle x, SqlSingle y)
 177                 {
 178                         return (x * y);
 179                 }
 180
 181                 public static SqlBoolean NotEquals (SqlSingle x, SqlSingle y)
 182                 {
 183                         return (x != y);
 184                 }
 185
 186                 public static SqlSingle Parse (string s)
 187                 {
 188                         return new SqlSingle (Single.Parse (s));
 189                 }
 190
 191                 public static SqlSingle Subtract (SqlSingle x, SqlSingle y)
 192                 {
 193                         return (x - y);
 194                 }
 195
 196                 public SqlBoolean ToSqlBoolean ()
 197                 {
 198                         return ((SqlBoolean) this);
 199                 }
 200
 201                 public SqlByte ToSqlByte ()
 202                 {
 203                         return ((SqlByte) this);
 204                 }
 205
 206                 public SqlDecimal ToSqlDecimal ()
 207                 {
 208                         return ((SqlDecimal) this);
 209                 }
 210
 211                 public SqlDouble ToSqlDouble ()
 212                 {
 213                         return ((SqlDouble) this);
 214                 }
 215
 216                 public SqlInt16 ToSqlInt16 ()
 217                 {
 218                         return ((SqlInt16) this);
 219                 }
 220
 221                 public SqlInt32 ToSqlInt32 ()
 222                 {
 223                         return ((SqlInt32) this);
 224                 }
 225
 226                 public SqlInt64 ToSqlInt64 ()
 227                 {
 228                         return ((SqlInt64) this);
 229                 }
 230
 231                 public SqlMoney ToSqlMoney ()
 232                 {
 233                         return ((SqlMoney) this);
 234                 }
 235
 236                 public SqlString ToSqlString ()
 237                 {
 238                         return ((SqlString) this);
 239                 }
 240
 241                 public override string ToString ()
 242                 {
 243                         if (!notNull)
 244                                 return "Null";
 245                         return value.ToString ();
 246                 }
 247
 248                 public static SqlSingle operator + (SqlSingle x, SqlSingle y)
 249                 {
 250                         float f = (float) (x.Value + y.Value);
 251
 252                         if (Single.IsInfinity (f))
 253                                 throw new OverflowException ();
 254
 255                         return new SqlSingle (f);
 256                 }
 257
 258                 public static SqlSingle operator / (SqlSingle x, SqlSingle y)
 259                 {
 260                         float f = (float) (x.Value / y.Value);
 261
 262                         if (Single.IsInfinity (f)) {
 263                                 if (y.Value == 0d)
 264                                         throw new DivideByZeroException ();
 265                         }
 266
 267                         return new SqlSingle (x.Value / y.Value);
 268                 }
 269
 270                 public static SqlBoolean operator == (SqlSingle x, SqlSingle y)
 271                 {
 272                         if (x.IsNull || y .IsNull)
 273                                 return SqlBoolean.Null;
 274                         return new SqlBoolean (x.Value == y.Value);
 275                 }
 276
 277                 public static SqlBoolean operator > (SqlSingle x, SqlSingle y)
 278                 {
 279                         if (x.IsNull || y .IsNull)
 280                                 return SqlBoolean.Null;
 281                         return new SqlBoolean (x.Value > y.Value);
 282                 }
 283
 284                 public static SqlBoolean operator >= (SqlSingle x, SqlSingle y)
 285                 {
 286                         if (x.IsNull || y .IsNull)
 287                                 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)
 294                                 return SqlBoolean.Null;
 295                         return new SqlBoolean (!(x.Value == y.Value));
 296                 }
 297
 298                 public static SqlBoolean operator < (SqlSingle x, SqlSingle y)
 299                 {
 300                         if (x.IsNull || y .IsNull)
 301                                 return SqlBoolean.Null;
 302                         return new SqlBoolean (x.Value < y.Value);
 303                 }
 304
 305                 public static SqlBoolean operator <= (SqlSingle x, SqlSingle y)
 306                 {
 307                         if (x.IsNull || y .IsNull)
 308                                 return SqlBoolean.Null;
 309                         return new SqlBoolean (x.Value <= y.Value);
 310                 }
 311
 312                 public static SqlSingle operator * (SqlSingle x, SqlSingle y)
 313                 {
 314                         float f = (float) (x.Value * y.Value);
 315
 316                         if (Single.IsInfinity (f))
 317                                 throw new OverflowException ();
 318
 319                         return new SqlSingle (f);
 320                 }
 321
 322                 public static SqlSingle operator - (SqlSingle x, SqlSingle y)
 323                 {
 324                         float f = (float) (x.Value - y.Value);
 325
 326                         if (Single.IsInfinity (f))
 327                                 throw new OverflowException ();
 328
 329                         return new SqlSingle (f);
 330                 }
 331
 332                 public static SqlSingle operator - (SqlSingle x)
 333                 {
 334                         return new SqlSingle (-(x.Value));
 335                 }
 336
 337                 public static explicit operator SqlSingle (SqlBoolean x)
 338                 {
 339                         checked {
 340                                 if (x.IsNull)
 341                                         return Null;
 342
 343                                 return new SqlSingle((float)x.ByteValue);
 344                         }
 345                 }
 346
 347                 public static explicit operator SqlSingle (SqlDouble x)
 348                 {
 349                         if (x.IsNull)
 350                                 return Null;
 351
 352                         float f = (float)x.Value;
 353
 354                         if (Single.IsInfinity (f))
 355                                 throw new OverflowException ();
 356
 357                         return new SqlSingle(f);
 358                 }
 359
 360                 public static explicit operator float (SqlSingle x)
 361                 {
 362                         return x.Value;
 363                 }
 364
 365                 public static explicit operator SqlSingle (SqlString x)
 366                 {
 367                         checked {
 368                                 if (x.IsNull)
 369                                         return Null;
 370
 371                                 return SqlSingle.Parse (x.Value);
 372                         }
 373                 }
 374
 375                 public static implicit operator SqlSingle (float x)
 376                 {
 377                         return new SqlSingle (x);
 378                 }
 379
 380                 public static implicit operator SqlSingle (SqlByte x)
 381                 {
 382                         if (x.IsNull)
 383                                 return Null;
 384                         else
 385                                 return new SqlSingle((float) x.Value);
 386                 }
 387
 388                 public static implicit operator SqlSingle (SqlDecimal x)
 389                 {
 390                         if (x.IsNull)
 391                                 return Null;
 392                         else
 393                                 return new SqlSingle((float) x.Value);
 394                 }
 395
 396                 public static implicit operator SqlSingle (SqlInt16 x)
 397                 {
 398                         if (x.IsNull)
 399                                 return Null;
 400                         else
 401                                 return new SqlSingle((float) x.Value);
 402                 }
 403
 404                 public static implicit operator SqlSingle (SqlInt32 x)
 405                 {
 406                         if (x.IsNull)
 407                                 return Null;
 408                         else
 409                                 return new SqlSingle((float) x.Value);
 410                 }
 411
 412                 public static implicit operator SqlSingle (SqlInt64 x)
 413                 {
 414                         if (x.IsNull)
 415                                 return Null;
 416                         else
 417                                 return new SqlSingle((float) x.Value);
 418                 }
 419
 420                 public static implicit operator SqlSingle (SqlMoney x)
 421                 {
 422                         if (x.IsNull)
 423                                 return Null;
 424                         else
 425                                 return new SqlSingle((float) x.Value);
 426                 }
 427
 428 #if NET_2_0
 429                 public static XmlQualifiedName GetXsdType (XmlSchemaSet schemaSet)
 430                 {
 431                         XmlQualifiedName qualifiedName = new XmlQualifiedName ("float", "http://www.w3.org/2001/XMLSchema");
 432                         return qualifiedName;
 433                 }
 434
 435                 [MonoTODO]
 436                 XmlSchema IXmlSerializable.GetSchema ()
 437                 {
 438                         throw new NotImplementedException ();
 439                 }
 440
 441                 [MonoTODO]
 442                 void IXmlSerializable.ReadXml (XmlReader reader)
 443                 {
 444                         throw new NotImplementedException ();
 445                 }
 446
 447                 [MonoTODO]
 448                 void IXmlSerializable.WriteXml (XmlWriter writer)
 449                 {
 450                         throw new NotImplementedException ();
 451                 }
 452 #endif
 453
 454                 #endregion
 455         }
 456 }