2 // System.Data.SqlTypes.SqlBoolean
5 // Rodrigo Moya (rodrigo@ximian.com)
6 // Daniel Morgan (danmorg@sc.rr.com)
7 // Tim Coleman (tim@timcoleman.com)
9 // (C) Ximian, Inc. 2002
10 // (C) Copyright 2002 Tim Coleman
14 using System.Globalization;
16 namespace System.Data.SqlTypes
19 /// Represents an integer value that is either 1 or 0
20 /// to be stored in or retrieved from a database.
22 public struct SqlBoolean : INullable, IComparable
29 public static readonly SqlBoolean False = new SqlBoolean (false);
30 public static readonly SqlBoolean Null;
31 public static readonly SqlBoolean One = new SqlBoolean (1);
32 public static readonly SqlBoolean True = new SqlBoolean (true);
33 public static readonly SqlBoolean Zero = new SqlBoolean (0);
39 public SqlBoolean (bool value)
41 this.value = (byte) (value ? 1 : 0);
44 public SqlBoolean (int value)
46 this.value = (byte) (value != 0 ? 1 : 0);
49 #endregion // Constructors
53 public byte ByteValue {
56 throw new SqlNullValueException( "The property is set to null.");
72 get { return (bool) (this == Null); }
87 throw new SqlNullValueException( "The property is set to null.");
93 #endregion // Properties
95 public static SqlBoolean And (SqlBoolean x, SqlBoolean y)
100 public int CompareTo (object value)
104 else if (!(value is SqlBoolean))
105 throw new ArgumentException (Locale.GetText ("Value is not a System.Data.SqlTypes.SqlBoolean"));
106 else if (((SqlBoolean)value).IsNull)
109 return this.value.CompareTo (((SqlBoolean)value).ByteValue);
112 public override bool Equals(object value)
114 if (!(value is SqlByte))
117 return (bool) (this == (SqlBoolean)value);
120 public static SqlBoolean Equals(SqlBoolean x, SqlBoolean y)
125 public override int GetHashCode()
130 public static SqlBoolean NotEquals(SqlBoolean x, SqlBoolean y)
135 public static SqlBoolean OnesComplement(SqlBoolean x)
140 public static SqlBoolean Or(SqlBoolean x, SqlBoolean y)
145 public static SqlBoolean Parse(string s)
147 return new SqlBoolean (Boolean.Parse (s));
150 public SqlByte ToSqlByte()
152 return new SqlByte (value);
155 // **************************************************
156 // Conversion from SqlBoolean to other SqlTypes
157 // **************************************************
159 public SqlDecimal ToSqlDecimal()
161 return ((SqlDecimal)this);
164 public SqlDouble ToSqlDouble()
166 return ((SqlDouble)this);
169 public SqlInt16 ToSqlInt16()
171 return ((SqlInt16)this);
174 public SqlInt32 ToSqlInt32()
176 return ((SqlInt32)this);
179 public SqlInt64 ToSqlInt64()
181 return ((SqlInt64)this);
184 public SqlMoney ToSqlMoney()
186 return ((SqlMoney)this);
189 public SqlSingle ToSqlSingle()
191 return ((SqlSingle)this);
195 public SqlString ToSqlString()
197 throw new NotImplementedException ();
201 public override string ToString()
203 throw new NotImplementedException ();
206 // Bitwise exclusive-OR (XOR)
207 public static SqlBoolean Xor(SqlBoolean x, SqlBoolean y)
212 // **************************************************
214 // **************************************************
217 public static SqlBoolean operator & (SqlBoolean x, SqlBoolean y)
219 return new SqlBoolean (x.Value & y.Value);
223 public static SqlBoolean operator | (SqlBoolean x, SqlBoolean y)
225 return new SqlBoolean (x.Value | y.Value);
229 // Compares two instances for equality
230 public static SqlBoolean operator == (SqlBoolean x, SqlBoolean y)
232 if (x.IsNull || y.IsNull)
233 return SqlBoolean.Null;
235 return new SqlBoolean (x.Value == y.Value);
238 // Bitwize exclusive-OR (XOR)
239 public static SqlBoolean operator ^ (SqlBoolean x, SqlBoolean y)
241 return new SqlBoolean (x.Value ^ y.Value);
244 // test Value of SqlBoolean to determine it is false.
245 public static bool operator false (SqlBoolean x)
251 public static SqlBoolean operator != (SqlBoolean x, SqlBoolean y)
253 if (x.IsNull || y.IsNull)
254 return SqlBoolean.Null;
256 return new SqlBoolean (x.Value != y.Value);
260 public static SqlBoolean operator ! (SqlBoolean x)
263 return SqlBoolean.Null;
265 return new SqlBoolean (!x.Value);
269 public static SqlBoolean operator ~ (SqlBoolean x)
271 return new SqlBoolean (~x.ByteValue);
274 // test to see if value is true
275 public static bool operator true (SqlBoolean x)
280 // ****************************************
282 // ****************************************
285 // SqlBoolean to Boolean
286 public static explicit operator bool (SqlBoolean x)
292 // SqlByte to SqlBoolean
293 public static explicit operator SqlBoolean (SqlByte x)
298 return new SqlBoolean ((int)x.Value);
301 // SqlDecimal to SqlBoolean
302 public static explicit operator SqlBoolean (SqlDecimal x)
307 return new SqlBoolean ((int)x.Value);
310 // SqlDouble to SqlBoolean
311 public static explicit operator SqlBoolean (SqlDouble x)
316 return new SqlBoolean ((int)x.Value);
319 // SqlInt16 to SqlBoolean
320 public static explicit operator SqlBoolean (SqlInt16 x)
325 return new SqlBoolean ((int)x.Value);
328 // SqlInt32 to SqlBoolean
329 public static explicit operator SqlBoolean (SqlInt32 x)
334 return new SqlBoolean (x.Value);
337 // SqlInt64 to SqlBoolean
338 public static explicit operator SqlBoolean (SqlInt64 x)
343 return new SqlBoolean ((int)x.Value);
346 // SqlMoney to SqlBoolean
347 public static explicit operator SqlBoolean (SqlMoney x)
352 return new SqlBoolean ((int)x.Value);
355 // SqlSingle to SqlBoolean
356 public static explicit operator SqlBoolean (SqlSingle x)
361 return new SqlBoolean ((int)x.Value);
364 // SqlString to SqlBoolean
366 public static explicit operator SqlBoolean (SqlString x)
368 throw new NotImplementedException ();
371 // Boolean to SqlBoolean
372 public static implicit operator SqlBoolean (bool x)
374 return new SqlBoolean (x);