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                         else if (((SqlSingle)value).IsNull)
 101                                 return 1;
 102                         else
 103                                 return this.value.CompareTo (((SqlSingle)value).Value);
 104                 }
 105
 106                 public static SqlSingle Divide (SqlSingle x, SqlSingle y)
 107                 {
 108                         return (x / y);
 109                 }
 110
 111                 public override bool Equals (object value)
 112                 {
 113                         if (!(value is SqlSingle))
 114                                 return false;
 115                         else if (this.IsNull && ((SqlSingle)value).IsNull)
 116                                 return true;
 117                         else if (((SqlSingle)value).IsNull)
 118                                 return false;
 119                         else
 120                                 return (bool) (this == (SqlSingle)value);
 121                 }
 122
 123                 public static SqlBoolean Equals (SqlSingle x, SqlSingle y)
 124                 {
 125                         return (x == y);
 126                 }
 127
 128                 public override int GetHashCode ()
 129                 {
 130                         long LongValue = (long) value;
 131                         return (int)(LongValue ^ (LongValue >> 32));
 132                 }
 133
 134                 public static SqlBoolean GreaterThan (SqlSingle x, SqlSingle y)
 135                 {
 136                         return (x > y);
 137                 }
 138
 139                 public static SqlBoolean GreaterThanOrEqual (SqlSingle x, SqlSingle y)
 140                 {
 141                         return (x >= y);
 142                 }
 143
 144                 public static SqlBoolean LessThan (SqlSingle x, SqlSingle y)
 145                 {
 146                         return (x < y);
 147                 }
 148
 149                 public static SqlBoolean LessThanOrEqual (SqlSingle x, SqlSingle y)
 150                 {
 151                         return (x <= y);
 152                 }
 153
 154                 public static SqlSingle Multiply (SqlSingle x, SqlSingle y)
 155                 {
 156                         return (x * y);
 157                 }
 158
 159                 public static SqlBoolean NotEquals (SqlSingle x, SqlSingle y)
 160                 {
 161                         return (x != y);
 162                 }
 163
 164                 public static SqlSingle Parse (string s)
 165                 {
 166                         return new SqlSingle (Single.Parse (s));
 167                 }
 168
 169                 public static SqlSingle Subtract (SqlSingle x, SqlSingle y)
 170                 {
 171                         return (x - y);
 172                 }
 173
 174                 public SqlBoolean ToSqlBoolean ()
 175                 {
 176                         return ((SqlBoolean)this);
 177                 }
 178
 179                 public SqlByte ToSqlByte ()
 180                 {
 181                         return ((SqlByte)this);
 182                 }
 183
 184                 public SqlDecimal ToSqlDecimal ()
 185                 {
 186                         return ((SqlDecimal)this);
 187                 }
 188
 189                 public SqlDouble ToSqlDouble ()
 190                 {
 191                         return ((SqlDouble)this);
 192                 }
 193
 194                 public SqlInt16 ToSqlInt16 ()
 195                 {
 196                         return ((SqlInt16)this);
 197                 }
 198
 199                 public SqlInt32 ToSqlInt32 ()
 200                 {
 201                         return ((SqlInt32)this);
 202                 }
 203
 204                 public SqlInt64 ToSqlInt64 ()
 205                 {
 206                         return ((SqlInt64)this);
 207                 }
 208
 209                 public SqlMoney ToSqlMoney ()
 210                 {
 211                         return ((SqlMoney)this);
 212                 }
 213
 214
 215                 public SqlString ToSqlString ()
 216                 {
 217                         return ((SqlString)this);
 218                 }
 219
 220                 public override string ToString ()
 221                 {
 222                         if (!notNull)
 223                                 return "Null";
 224                         return value.ToString ();
 225                 }
 226
 227                 public static SqlSingle operator + (SqlSingle x, SqlSingle y)
 228                 {
 229                         float f = (float)(x.Value + y.Value);
 230
 231                         if (Single.IsInfinity (f))
 232                                 throw new OverflowException ();
 233
 234                         return new SqlSingle (f);
 235                 }
 236
 237                 public static SqlSingle operator / (SqlSingle x, SqlSingle y)
 238                 {
 239                         float f = (float)(x.Value / y.Value);
 240
 241                         if (Single.IsInfinity (f)) {
 242
 243                                 if (y.Value == 0d)
 244                                         throw new DivideByZeroException ();
 245                         }
 246
 247                         return new SqlSingle (x.Value / y.Value);
 248                 }
 249
 250                 public static SqlBoolean operator == (SqlSingle x, SqlSingle y)
 251                 {
 252                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 253                         return new SqlBoolean (x.Value == y.Value);
 254                 }
 255
 256                 public static SqlBoolean operator > (SqlSingle x, SqlSingle y)
 257                 {
 258                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 259                         return new SqlBoolean (x.Value > y.Value);
 260                 }
 261
 262                 public static SqlBoolean operator >= (SqlSingle x, SqlSingle y)
 263                 {
 264                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 265                         return new SqlBoolean (x.Value >= y.Value);
 266                 }
 267
 268                 public static SqlBoolean operator != (SqlSingle x, SqlSingle y)
 269                 {
 270                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 271                         return new SqlBoolean (!(x.Value == y.Value));
 272                 }
 273
 274                 public static SqlBoolean operator < (SqlSingle x, SqlSingle y)
 275                 {
 276                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 277                         return new SqlBoolean (x.Value < y.Value);
 278                 }
 279
 280                 public static SqlBoolean operator <= (SqlSingle x, SqlSingle y)
 281                 {
 282                         if (x.IsNull || y .IsNull) return SqlBoolean.Null;
 283                         return new SqlBoolean (x.Value <= y.Value);
 284                 }
 285
 286                 public static SqlSingle operator * (SqlSingle x, SqlSingle y)
 287                 {
 288                         float f = (float)(x.Value * y.Value);
 289
 290                         if (Single.IsInfinity (f))
 291                                 throw new OverflowException ();
 292
 293                         return new SqlSingle (f);
 294                 }
 295
 296                 public static SqlSingle operator - (SqlSingle x, SqlSingle y)
 297                 {
 298                         float f = (float)(x.Value - y.Value);
 299
 300                         if (Single.IsInfinity (f))
 301                                 throw new OverflowException ();
 302
 303                         return new SqlSingle (f);
 304                 }
 305
 306                 public static SqlSingle operator - (SqlSingle n)
 307                 {
 308                         return new SqlSingle (-(n.Value));
 309                 }
 310
 311                 public static explicit operator SqlSingle (SqlBoolean x)
 312                 {
 313                         checked {
 314                                 if (x.IsNull)
 315                                         return Null;
 316
 317                                 return new SqlSingle((float)x.ByteValue);
 318                         }
 319                 }
 320
 321                 public static explicit operator SqlSingle (SqlDouble x)
 322                 {
 323                         if (x.IsNull)
 324                                 return Null;
 325
 326                         float f = (float)x.Value;
 327
 328                         if (Single.IsInfinity (f))
 329                                 throw new OverflowException ();
 330
 331                         return new SqlSingle(f);
 332                 }
 333
 334                 public static explicit operator float (SqlSingle x)
 335                 {
 336                         return x.Value;
 337                 }
 338
 339                 public static explicit operator SqlSingle (SqlString x)
 340                 {
 341                         checked {
 342                                 if (x.IsNull)
 343                                         return Null;
 344
 345                                 return SqlSingle.Parse (x.Value);
 346                         }
 347                 }
 348
 349                 public static implicit operator SqlSingle (float x)
 350                 {
 351                         return new SqlSingle (x);
 352                 }
 353
 354                 public static implicit operator SqlSingle (SqlByte x)
 355                 {
 356                         if (x.IsNull)
 357                                 return Null;
 358                         else
 359                                 return new SqlSingle((float)x.Value);
 360                 }
 361
 362                 public static implicit operator SqlSingle (SqlDecimal x)
 363                 {
 364                         if (x.IsNull)
 365                                 return Null;
 366                         else
 367                                 return new SqlSingle((float)x.Value);
 368                 }
 369
 370                 public static implicit operator SqlSingle (SqlInt16 x)
 371                 {
 372                         if (x.IsNull)
 373                                 return Null;
 374                         else
 375                                 return new SqlSingle((float)x.Value);
 376                 }
 377
 378                 public static implicit operator SqlSingle (SqlInt32 x)
 379                 {
 380                         if (x.IsNull)
 381                                 return Null;
 382                         else
 383                                 return new SqlSingle((float)x.Value);
 384                 }
 385
 386                 public static implicit operator SqlSingle (SqlInt64 x)
 387                 {
 388                         if (x.IsNull)
 389                                 return Null;
 390                         else
 391                                 return new SqlSingle((float)x.Value);
 392                 }
 393
 394                 public static implicit operator SqlSingle (SqlMoney x)
 395                 {
 396                         if (x.IsNull)
 397                                 return Null;
 398                         else
 399                                 return new SqlSingle((float)x.Value);
 400                 }
 401
 402                 #endregion
 403         }
 404 }
 405