mcs/class/Mono.Data.TdsClient/Mono.Data.TdsTypes/TdsBoolean.cs

   1 //
   2 // Mono.Data.TdsTypes.TdsBoolean
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //
   7 // (C) Copyright Tim Coleman, 2002
   8 //
   9
  10 using Mono.Data.TdsClient;
  11 using System;
  12 using System.Data.SqlTypes;
  13 using System.Globalization;
  14
  15 namespace Mono.Data.TdsTypes {
  16         public struct TdsBoolean : INullable, IComparable
  17         {
  18                 #region Fields
  19
  20                 byte value;
  21
  22                 // default is false
  23                 private bool notNull;
  24
  25                 public static readonly TdsBoolean False = new TdsBoolean (false);
  26                 public static readonly TdsBoolean Null;
  27                 public static readonly TdsBoolean One = new TdsBoolean (1);
  28                 public static readonly TdsBoolean True = new TdsBoolean (true);
  29                 public static readonly TdsBoolean Zero = new TdsBoolean (0);
  30
  31                 #endregion // Fields
  32
  33                 #region Constructors
  34
  35                 public TdsBoolean (bool value)
  36                 {
  37                         this.value = (byte) (value ? 1 : 0);
  38                         notNull = true;
  39                 }
  40
  41                 public TdsBoolean (int value)
  42                 {
  43                         this.value = (byte) (value != 0 ? 1 : 0);
  44                         notNull = true;
  45                 }
  46
  47                 #endregion // Constructors
  48
  49                 #region Properties
  50
  51                 public byte ByteValue {
  52                         get {
  53                                 if (this.IsNull)
  54                                         throw new TdsNullValueException(Locale.GetText("The property is set to null."));
  55                                 else
  56                                         return value;
  57                         }
  58                 }
  59
  60                 public bool IsFalse {
  61                         get {
  62                                 if (this.IsNull)
  63                                         return false;
  64                                 else
  65                                         return (value == 0);
  66                         }
  67                 }
  68
  69                 public bool IsNull {
  70                         get {
  71                                 return !notNull;
  72                         }
  73                 }
  74
  75                 public bool IsTrue {
  76                         get {
  77                                 if (this.IsNull)
  78                                         return false;
  79                                 else
  80                                         return (value != 0);
  81                         }
  82                 }
  83
  84                 public bool Value {
  85                         get {
  86                                 if (this.IsNull)
  87                                         throw new TdsNullValueException(Locale.GetText("The property is set to null."));
  88                                 else
  89                                         return this.IsTrue;
  90                         }
  91                 }
  92
  93                 #endregion // Properties
  94
  95                 public static TdsBoolean And (TdsBoolean x, TdsBoolean y)
  96                 {
  97                         return (x & y);
  98                 }
  99
 100                 public int CompareTo (object value)
 101                 {
 102                         if (value == null)
 103                                 return 1;
 104                         else if (!(value is TdsBoolean))
 105                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Data.TdsTypes.TdsBoolean"));
 106                         else if (((TdsBoolean)value).IsNull)
 107                                 return 1;
 108                         else
 109                                 return this.value.CompareTo (((TdsBoolean)value).ByteValue);
 110                 }
 111
 112                 public override bool Equals(object value)
 113                 {
 114                         if (!(value is TdsByte))
 115                                 return false;
 116                         else
 117                                 return (bool) (this == (TdsBoolean)value);
 118                 }
 119
 120                 public static TdsBoolean Equals(TdsBoolean x, TdsBoolean y)
 121                 {
 122                         return (x == y);
 123                 }
 124
 125                 public override int GetHashCode()
 126                 {
 127                         return (int)value;
 128                 }
 129
 130                 public static TdsBoolean NotEquals(TdsBoolean x, TdsBoolean y)
 131                 {
 132                         return (x != y);
 133                 }
 134
 135                 public static TdsBoolean OnesComplement(TdsBoolean x)
 136                 {
 137                         return ~x;
 138                 }
 139
 140                 public static TdsBoolean Or(TdsBoolean x, TdsBoolean y)
 141                 {
 142                         return (x | y);
 143                 }
 144
 145                 public static TdsBoolean Parse(string s)
 146                 {
 147                         return new TdsBoolean (Boolean.Parse (s));
 148                 }
 149
 150                 public TdsByte ToTdsByte()
 151                 {
 152                         return new TdsByte (value);
 153                 }
 154
 155                 // **************************************************
 156                 // Conversion from TdsBoolean to other TdsTypes
 157                 // **************************************************
 158
 159                 public TdsDecimal ToTdsDecimal()
 160                 {
 161                         return ((TdsDecimal)this);
 162                 }
 163
 164                 public TdsDouble ToTdsDouble()
 165                 {
 166                         return ((TdsDouble)this);
 167                 }
 168
 169                 public TdsInt16 ToTdsInt16()
 170                 {
 171                         return ((TdsInt16)this);
 172                 }
 173
 174                 public TdsInt32 ToTdsInt32()
 175                 {
 176                         return ((TdsInt32)this);
 177                 }
 178
 179                 public TdsInt64 ToTdsInt64()
 180                 {
 181                         return ((TdsInt64)this);
 182                 }
 183
 184                 public TdsMoney ToTdsMoney()
 185                 {
 186                         return ((TdsMoney)this);
 187                 }
 188
 189                 public TdsSingle ToTdsSingle()
 190                 {
 191                         return ((TdsSingle)this);
 192                 }
 193
 194                 public TdsString ToTdsString()
 195                 {
 196                         if (this.IsNull)
 197                                 return new TdsString ("Null");
 198                         if (this.IsTrue)
 199                                 return new TdsString ("True");
 200                         else
 201                                 return new TdsString ("False");
 202                 }
 203
 204                 public override string ToString()
 205                 {
 206                         if (this.IsNull)
 207                                 return "Null";
 208                         if (this.IsTrue)
 209                                 return "True";
 210                         else
 211                                 return "False";
 212                 }
 213
 214                 // Bitwise exclusive-OR (XOR)
 215                 public static TdsBoolean Xor(TdsBoolean x, TdsBoolean y)
 216                 {
 217                         return (x ^ y);
 218                 }
 219
 220                 // **************************************************
 221                 // Public Operators
 222                 // **************************************************
 223
 224                 // Bitwise AND
 225                 public static TdsBoolean operator & (TdsBoolean x, TdsBoolean y)
 226                 {
 227                         return new TdsBoolean (x.Value & y.Value);
 228                 }
 229
 230                 // Bitwise OR
 231                 public static TdsBoolean operator | (TdsBoolean x, TdsBoolean y)
 232                 {
 233                         return new TdsBoolean (x.Value | y.Value);
 234
 235                 }
 236
 237                 // Compares two instances for equality
 238                 public static TdsBoolean operator == (TdsBoolean x, TdsBoolean y)
 239                 {
 240                         if (x.IsNull || y.IsNull)
 241                                 return TdsBoolean.Null;
 242                         else
 243                                 return new TdsBoolean (x.Value == y.Value);
 244                 }
 245
 246                 // Bitwize exclusive-OR (XOR)
 247                 public static TdsBoolean operator ^ (TdsBoolean x, TdsBoolean y)
 248                 {
 249                         return new TdsBoolean (x.Value ^ y.Value);
 250                 }
 251
 252                 // test Value of TdsBoolean to determine it is false.
 253                 public static bool operator false (TdsBoolean x)
 254                 {
 255                         return x.IsFalse;
 256                 }
 257
 258                 // in-equality
 259                 public static TdsBoolean operator != (TdsBoolean x, TdsBoolean y)
 260                 {
 261                         if (x.IsNull || y.IsNull)
 262                                 return TdsBoolean.Null;
 263                         else
 264                                 return new TdsBoolean (x.Value != y.Value);
 265                 }
 266
 267                 // Logical NOT
 268                 public static TdsBoolean operator ! (TdsBoolean x)
 269                 {
 270                         if (x.IsNull)
 271                                 return TdsBoolean.Null;
 272                         else
 273                                 return new TdsBoolean (!x.Value);
 274                 }
 275
 276                 // One's Complement
 277                 public static TdsBoolean operator ~ (TdsBoolean x)
 278                 {
 279                         return new TdsBoolean (~x.ByteValue);
 280                 }
 281
 282                 // test to see if value is true
 283                 public static bool operator true (TdsBoolean x)
 284                 {
 285                         return x.IsTrue;
 286                 }
 287
 288                 // ****************************************
 289                 // Type Conversion
 290                 // ****************************************
 291
 292
 293                 // TdsBoolean to Boolean
 294                 public static explicit operator bool (TdsBoolean x)
 295                 {
 296                         return x.Value;
 297                 }
 298
 299
 300                 // TdsByte to TdsBoolean
 301                 public static explicit operator TdsBoolean (TdsByte x)
 302                 {
 303                         if (x.IsNull)
 304                                 return Null;
 305                         else
 306                                 return new TdsBoolean ((int)x.Value);
 307                 }
 308
 309                 // TdsDecimal to TdsBoolean
 310                 public static explicit operator TdsBoolean (TdsDecimal x)
 311                 {
 312                         if (x.IsNull)
 313                                 return Null;
 314                         else
 315                                 return new TdsBoolean ((int)x.Value);
 316                 }
 317
 318                 // TdsDouble to TdsBoolean
 319                 public static explicit operator TdsBoolean (TdsDouble x)
 320                 {
 321                         if (x.IsNull)
 322                                 return Null;
 323                         else
 324                                 return new TdsBoolean ((int)x.Value);
 325                 }
 326
 327                 // TdsInt16 to TdsBoolean
 328                 public static explicit operator TdsBoolean (TdsInt16 x)
 329                 {
 330                         if (x.IsNull)
 331                                 return Null;
 332                         else
 333                                 return new TdsBoolean ((int)x.Value);
 334                 }
 335
 336                 // TdsInt32 to TdsBoolean
 337                 public static explicit operator TdsBoolean (TdsInt32 x)
 338                 {
 339                         if (x.IsNull)
 340                                 return Null;
 341                         else
 342                                 return new TdsBoolean (x.Value);
 343                 }
 344
 345                 // TdsInt64 to TdsBoolean
 346                 public static explicit operator TdsBoolean (TdsInt64 x)
 347                 {
 348                         if (x.IsNull)
 349                                 return Null;
 350                         else
 351                                 return new TdsBoolean ((int)x.Value);
 352                 }
 353
 354                 // TdsMoney to TdsBoolean
 355                 public static explicit operator TdsBoolean (TdsMoney x)
 356                 {
 357                         if (x.IsNull)
 358                                 return Null;
 359                         else
 360                                 return new TdsBoolean ((int)x.Value);
 361                 }
 362
 363                 // TdsSingle to TdsBoolean
 364                 public static explicit operator TdsBoolean (TdsSingle x)
 365                 {
 366                         if (x.IsNull)
 367                                 return Null;
 368                         else
 369                                 return new TdsBoolean ((int)x.Value);
 370                 }
 371
 372                 // TdsString to TdsBoolean
 373                 public static explicit operator TdsBoolean (TdsString x)
 374                 {
 375                         return TdsBoolean.Parse (x.Value);
 376                 }
 377
 378                 // Boolean to TdsBoolean
 379                 public static implicit operator TdsBoolean (bool x)
 380                 {
 381                         return new TdsBoolean (x);
 382                 }
 383         }
 384 }