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.Globalization;
  36
  37 namespace System.Data.SqlTypes
  38 {
  39         public struct SqlSingle : INullable, IComparable
  40         {
  41                 #region Fields
  42
  43                 float value;
  44
  45                 private bool notNull;
  46
  47                 public static readonly SqlSingle MaxValue = new SqlSingle (3.40282346638528859E+38f);
  48                 public static readonly SqlSingle MinValue = new SqlSingle (-3.40282346638528859E+38f);
  49                 public static readonly SqlSingle Null;
  50                 public static readonly SqlSingle Zero = new SqlSingle (0);
  51
  52                 #endregion
  53
  54                 #region Constructors
  55
  56                 public SqlSingle (double value)
  57                 {
  58                         this.value = (float)value;
  59                         notNull = true;
  60                 }
  61
  62                 public SqlSingle (float value)
  63                 {
  64                         this.value = value;
  65                         notNull = true;
  66                 }
  67
  68                 #endregion
  69
  70                 #region Properties
  71
  72                 public bool IsNull {
  73                         get { return !notNull; }
  74                 }
  75
  76                 public float Value {
  77                         get {
  78                                 if (this.IsNull)
  79                                         throw new SqlNullValueException ();
  80                                 else
  81                                         return value;
  82                         }
  83                 }
  84
  85                 #endregion
  86
  87                 #region Methods
  88
  89                 public static SqlSingle Add (SqlSingle x, SqlSingle y)
  90                 {
  91                         return (x + y);
  92                 }
  93
  94                 public int CompareTo (object value)
  95                 {
  96                         if (value == null)
  97                                 return 1;
  98                         else if (!(value is SqlSingle))
  99                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Data.SqlTypes.SqlSingle"));
 100
 101                         return CompareSqlSingle ((SqlSingle) value);
 102                 }
 103
 104                 #if NET_2_0
 105                 public int CompareTo (SqlSingle value)
 106                 {
 107                         return CompareSqlSingle (value);
 108                 }
 109                 #endif
 110
 111                 private int CompareSqlSingle (SqlSingle value)
 112                 {
 113                         if (value.IsNull)
 114                                 return 1;
 115                         else
 116                                 return this.value.CompareTo (value.Value);
 117                 }
 118
 119                 public static SqlSingle Divide (SqlSingle x, SqlSingle y)
 120                 {
 121                         return (x / y);
 122                 }
 123
 124                 public override bool Equals (object value)
 125                 {
 126                         if (!(value is SqlSingle))
 127                                 return false;
 128                         else if (this.IsNull && ((SqlSingle)value).IsNull)
 129                                 return true;
 130                         else if (((SqlSingle)value).IsNull)
 131                                 return false;
 132                         else
 133                                 return (bool) (this == (SqlSingle)value);
 134                 }
 135
 136                 public static SqlBoolean Equals (SqlSingle x, SqlSingle y)
 137                 {
 138                         return (x == y);
 139                 }
 140
 141                 public override int GetHashCode ()
 142                 {
 143                         long LongValue = (long) value;
 144                         return (int)(LongValue ^ (LongValue >> 32));
 145                 }
 146
 147                 public static SqlBoolean GreaterThan (SqlSingle x, SqlSingle y)
 148                 {
 149                         return (x > y);
 150                 }
 151
 152                 public static SqlBoolean GreaterThanOrEqual (SqlSingle x, SqlSingle y)
 153                 {
 154                         return (x >= y);
 155                 }
 156
 157                 public static SqlBoolean LessThan (SqlSingle x, SqlSingle y)
 158                 {
 159                         return (x < y);
 160                 }
 161
 162                 public static SqlBoolean LessThanOrEqual (SqlSingle x, SqlSingle y)
 163                 {
 164                         return (x <= y);
 165                 }
 166
 167                 public static SqlSingle Multiply (SqlSingle x, SqlSingle y)
 168                 {
 169                         return (x * y);
 170                 }
 171
 172                 public static SqlBoolean NotEquals (SqlSingle x, SqlSingle y)
 173                 {
 174                         return (x != y);
 175                 }
 176
 177                 public static SqlSingle Parse (string s)
 178                 {
 179                         return new SqlSingle (Single.Parse (s));
 180                 }
 181
 182                 public static SqlSingle Subtract (SqlSingle x, SqlSingle y)
 183                 {
 184                         return (x - y);
 185                 }
 186
 187                 public SqlBoolean ToSqlBoolean ()
 188                 {
 189                         return ((SqlBoolean)this);
 190                 }
 191
 192                 public SqlByte ToSqlByte ()
 193                 {
 194                         return ((SqlByte)this);
 195                 }
 196
 197                 public SqlDecimal ToSqlDecimal ()
 198                 {
 199                         return ((SqlDecimal)this);
 200                 }
 201
 202                 public SqlDouble ToSqlDouble ()
 203                 {
 204                         return ((SqlDouble)this);
 205                 }
 206
 207                 public SqlInt16 ToSqlInt16 ()
 208                 {
 209                         return ((SqlInt16)this);
 210                 }
 211
 212                 public SqlInt32 ToSqlInt32 ()
 213                 {
 214                         return ((SqlInt32)this);
 215                 }
 216
 217                 public SqlInt64 ToSqlInt64 ()
 218                 {
 219                         return ((SqlInt64)this);
 220                 }
 221
 222                 public SqlMoney ToSqlMoney ()
 223                 {
 224                         return ((SqlMoney)this);
 225                 }
 226
 227
 228                 public SqlString ToSqlString ()
 229                 {
 230                         return ((SqlString)this);
 231                 }
 232
 233                 public override string ToString ()
 234                 {
 235                         if (!notNull)
 236                                 return "Null";
 237                         return value.ToString ();
 238                 }
 239
 240                 public static SqlSingle operator + (SqlSingle x, SqlSingle y)
 241                 {
 242                         float f = (float)(x.Value + y.Value);
 243
 244                         if (Single.IsInfinity (f))
 245                                 throw new OverflowException ();
 246
 247                         return new SqlSingle (f);
 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
 256                                 if (y.Value == 0d)
 257                                         throw new DivideByZeroException ();
 258                         }
 259
 260                         return new SqlSingle (x.Value / y.Value);
 261                 }
 262
 263                 public static SqlBoolean operator == (SqlSingle x, SqlSingle y)
 264                 {
 265                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 266                         return new SqlBoolean (x.Value == y.Value);
 267                 }
 268
 269                 public static SqlBoolean operator > (SqlSingle x, SqlSingle y)
 270                 {
 271                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 272                         return new SqlBoolean (x.Value > y.Value);
 273                 }
 274
 275                 public static SqlBoolean operator >= (SqlSingle x, SqlSingle y)
 276                 {
 277                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 278                         return new SqlBoolean (x.Value >= y.Value);
 279                 }
 280
 281                 public static SqlBoolean operator != (SqlSingle x, SqlSingle y)
 282                 {
 283                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 284                         return new SqlBoolean (!(x.Value == y.Value));
 285                 }
 286
 287                 public static SqlBoolean operator < (SqlSingle x, SqlSingle y)
 288                 {
 289                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 290                         return new SqlBoolean (x.Value < y.Value);
 291                 }
 292
 293                 public static SqlBoolean operator <= (SqlSingle x, SqlSingle y)
 294                 {
 295                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 296                         return new SqlBoolean (x.Value <= y.Value);
 297                 }
 298
 299                 public static SqlSingle operator * (SqlSingle x, SqlSingle y)
 300                 {
 301                         float f = (float)(x.Value * y.Value);
 302
 303                         if (Single.IsInfinity (f))
 304                                 throw new OverflowException ();
 305
 306                         return new SqlSingle (f);
 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 n)
 320                 {
 321                         return new SqlSingle (-(n.Value));
 322                 }
 323
 324                 public static explicit operator SqlSingle (SqlBoolean x)
 325                 {
 326                         checked {
 327                                 if (x.IsNull)
 328                                         return Null;
 329
 330                                 return new SqlSingle((float)x.ByteValue);
 331                         }
 332                 }
 333
 334                 public static explicit operator SqlSingle (SqlDouble x)
 335                 {
 336                         if (x.IsNull)
 337                                 return Null;
 338
 339                         float f = (float)x.Value;
 340
 341                         if (Single.IsInfinity (f))
 342                                 throw new OverflowException ();
 343
 344                         return new SqlSingle(f);
 345                 }
 346
 347                 public static explicit operator float (SqlSingle x)
 348                 {
 349                         return x.Value;
 350                 }
 351
 352                 public static explicit operator SqlSingle (SqlString x)
 353                 {
 354                         checked {
 355                                 if (x.IsNull)
 356                                         return Null;
 357
 358                                 return SqlSingle.Parse (x.Value);
 359                         }
 360                 }
 361
 362                 public static implicit operator SqlSingle (float x)
 363                 {
 364                         return new SqlSingle (x);
 365                 }
 366
 367                 public static implicit operator SqlSingle (SqlByte x)
 368                 {
 369                         if (x.IsNull)
 370                                 return Null;
 371                         else
 372                                 return new SqlSingle((float)x.Value);
 373                 }
 374
 375                 public static implicit operator SqlSingle (SqlDecimal x)
 376                 {
 377                         if (x.IsNull)
 378                                 return Null;
 379                         else
 380                                 return new SqlSingle((float)x.Value);
 381                 }
 382
 383                 public static implicit operator SqlSingle (SqlInt16 x)
 384                 {
 385                         if (x.IsNull)
 386                                 return Null;
 387                         else
 388                                 return new SqlSingle((float)x.Value);
 389                 }
 390
 391                 public static implicit operator SqlSingle (SqlInt32 x)
 392                 {
 393                         if (x.IsNull)
 394                                 return Null;
 395                         else
 396                                 return new SqlSingle((float)x.Value);
 397                 }
 398
 399                 public static implicit operator SqlSingle (SqlInt64 x)
 400                 {
 401                         if (x.IsNull)
 402                                 return Null;
 403                         else
 404                                 return new SqlSingle((float)x.Value);
 405                 }
 406
 407                 public static implicit operator SqlSingle (SqlMoney x)
 408                 {
 409                         if (x.IsNull)
 410                                 return Null;
 411                         else
 412                                 return new SqlSingle((float)x.Value);
 413                 }
 414
 415                 #endregion
 416         }
 417 }
 418