mcs/class/corlib/System/UInt16.cs

   1 //
   2 // System.UInt16.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 // Copyright (C) 2004 Novell (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Globalization;
  31
  32 namespace System
  33 {
  34         [Serializable]
  35         [CLSCompliant (false)]
  36         public struct UInt16 : IFormattable, IConvertible, IComparable
  37 #if NET_2_0
  38                 , IComparable<UInt16>, IEquatable <UInt16>
  39 #endif
  40         {
  41                 public const ushort MaxValue = 0xffff;
  42                 public const ushort MinValue = 0;
  43
  44                 internal ushort m_value;
  45
  46                 public int CompareTo (object value)
  47                 {
  48                         if (value == null)
  49                                 return 1;
  50
  51                         if(!(value is System.UInt16))
  52                                 throw new ArgumentException (Locale.GetText ("Value is not a System.UInt16."));
  53
  54                         return this.m_value - ((ushort) value);
  55                 }
  56
  57                 public override bool Equals (object obj)
  58                 {
  59                         if (!(obj is System.UInt16))
  60                                 return false;
  61
  62                         return ((ushort) obj) == m_value;
  63                 }
  64
  65                 public override int GetHashCode ()
  66                 {
  67                         return m_value;
  68                 }
  69
  70 #if NET_2_0
  71                 public int CompareTo (ushort value)
  72                 {
  73                         if (m_value == value)
  74                                 return 0;
  75                         if (m_value > value)
  76                                 return 1;
  77                         else
  78                                 return -1;
  79                 }
  80
  81                 public bool Equals (ushort value)
  82                 {
  83                         return value == m_value;
  84                 }
  85 #endif
  86
  87                 internal static bool Parse (string s, bool tryParse, out ushort result, out Exception exc)
  88                 {
  89                         ushort val = 0;
  90                         int len;
  91                         int i;
  92                         bool digits_seen = false;
  93                         bool has_negative_sign = false;
  94
  95                         result = 0;
  96                         exc = null;
  97
  98                         if (s == null) {
  99                                 if (!tryParse)
 100                                         exc = new ArgumentNullException ("s");
 101                                 return false;
 102                         }
 103
 104                         len = s.Length;
 105
 106                         char c;
 107                         for (i = 0; i < len; i++) {
 108                                 c = s [i];
 109                                 if (!Char.IsWhiteSpace (c))
 110                                         break;
 111                         }
 112
 113                         if (i == len) {
 114                                 if (!tryParse)
 115                                         exc = Int32.GetFormatException ();
 116                                 return false;
 117                         }
 118
 119                         if (s [i] == '+')
 120                                 i++;
 121                         else
 122                                 if (s[i] == '-') {
 123                                         i++;
 124                                         has_negative_sign = true;
 125                                 }
 126
 127                         for (; i < len; i++) {
 128                                 c = s [i];
 129
 130                                 if (c >= '0' && c <= '9') {
 131                                         ushort d = (ushort) (c - '0');
 132
 133                                         val = checked ((ushort) (val * 10 + d));
 134                                         digits_seen = true;
 135                                 }
 136                                 else {
 137                                         if (Char.IsWhiteSpace (c)) {
 138                                                 for (i++; i < len; i++) {
 139                                                         if (!Char.IsWhiteSpace (s [i])) {
 140                                                                 if (!tryParse)
 141                                                                         exc = Int32.GetFormatException ();
 142                                                                 return false;
 143                                                         }
 144                                                 }
 145                                                 break;
 146                                         }
 147                                         else {
 148                                                 if (!tryParse)
 149                                                         exc = Int32.GetFormatException ();
 150                                                 return false;
 151                                         }
 152                                 }
 153                         }
 154                         if (!digits_seen) {
 155                                 if (!tryParse)
 156                                         exc = Int32.GetFormatException ();
 157                                 return false;
 158                         }
 159
 160                         // -0 is legal but other negative values are not
 161                         if (has_negative_sign && (val > 0)) {
 162                                 if (!tryParse)
 163                                         exc = new OverflowException (
 164                                             Locale.GetText ("Negative number"));
 165                                 return false;
 166                         }
 167
 168                         result = val;
 169                         return true;
 170                 }
 171
 172                 [CLSCompliant (false)]
 173                 public static ushort Parse (string s, IFormatProvider provider)
 174                 {
 175                         return Parse (s, NumberStyles.Integer, provider);
 176                 }
 177
 178                 [CLSCompliant (false)]
 179                 public static ushort Parse (string s, NumberStyles style)
 180                 {
 181                         return Parse (s, style, null);
 182                 }
 183
 184                 [CLSCompliant (false)]
 185                 public static ushort Parse (string s, NumberStyles style, IFormatProvider provider)
 186                 {
 187                         uint tmpResult = UInt32.Parse (s, style, provider);
 188                         if (tmpResult > UInt16.MaxValue || tmpResult < UInt16.MinValue)
 189                                 throw new OverflowException (Locale.GetText ("Value too large or too small."));
 190
 191                         return (ushort) tmpResult;
 192                 }
 193
 194                 [CLSCompliant(false)]
 195                 public static ushort Parse (string s)
 196                 {
 197                         Exception exc;
 198                         ushort res;
 199
 200                         if (!Parse (s, false, out res, out exc))
 201                                 throw exc;
 202
 203                         return res;
 204                 }
 205
 206 #if NET_2_0
 207                 [CLSCompliant(false)]
 208                 public static bool TryParse (string s, out ushort result)
 209                 {
 210                         Exception exc;
 211                         if (!Parse (s, true, out result, out exc)) {
 212                                 result = 0;
 213                                 return false;
 214                         }
 215
 216                         return true;
 217                 }
 218
 219                 [CLSCompliant(false)]
 220                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out ushort result)
 221                 {
 222                         uint tmpResult;
 223                         result = 0;
 224
 225                         if (!UInt32.TryParse (s, style, provider, out tmpResult))
 226                                 return false;
 227
 228                         if (tmpResult > UInt16.MaxValue || tmpResult < UInt16.MinValue)
 229                                 return false;
 230
 231                         result = (ushort)tmpResult;
 232                         return true;
 233                 }
 234 #endif
 235
 236                 public override string ToString ()
 237                 {
 238                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value));
 239                 }
 240
 241                 public string ToString (IFormatProvider provider)
 242                 {
 243                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value), provider);
 244                 }
 245
 246                 public string ToString (string format)
 247                 {
 248                         return ToString (format, null);
 249                 }
 250
 251                 public string ToString (string format, IFormatProvider provider)
 252                 {
 253                         NumberFormatInfo nfi = NumberFormatInfo.GetInstance (provider);
 254                         return NumberFormatter.NumberToString (format, m_value, nfi);
 255                 }
 256
 257                 // =========== IConvertible Methods =========== //
 258                 public TypeCode GetTypeCode ()
 259                 {
 260                         return TypeCode.UInt16;
 261                 }
 262
 263                 bool IConvertible.ToBoolean (IFormatProvider provider)
 264                 {
 265                         return System.Convert.ToBoolean (m_value);
 266                 }
 267
 268                 byte IConvertible.ToByte (IFormatProvider provider)
 269                 {
 270                         return System.Convert.ToByte (m_value);
 271                 }
 272
 273                 char IConvertible.ToChar (IFormatProvider provider)
 274                 {
 275                         return System.Convert.ToChar (m_value);
 276                 }
 277
 278                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 279                 {
 280                         return System.Convert.ToDateTime (m_value);
 281                 }
 282
 283                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 284                 {
 285                         return System.Convert.ToDecimal (m_value);
 286                 }
 287
 288                 double IConvertible.ToDouble (IFormatProvider provider)
 289                 {
 290                         return System.Convert.ToDouble (m_value);
 291                 }
 292
 293                 short IConvertible.ToInt16 (IFormatProvider provider)
 294                 {
 295                         return System.Convert.ToInt16 (m_value);
 296                 }
 297
 298                 int IConvertible.ToInt32 (IFormatProvider provider)
 299                 {
 300                         return System.Convert.ToInt32 (m_value);
 301                 }
 302
 303                 long IConvertible.ToInt64 (IFormatProvider provider)
 304                 {
 305                         return System.Convert.ToInt64 (m_value);
 306                 }
 307
 308                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 309                 {
 310                         return System.Convert.ToSByte (m_value);
 311                 }
 312
 313                 float IConvertible.ToSingle (IFormatProvider provider)
 314                 {
 315                         return System.Convert.ToSingle (m_value);
 316                 }
 317
 318                 object IConvertible.ToType (Type conversionType, IFormatProvider provider)
 319                 {
 320                         return System.Convert.ToType (m_value, conversionType, provider);
 321                 }
 322
 323                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 324                 {
 325                         return m_value;
 326                 }
 327
 328                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 329                 {
 330                         return System.Convert.ToUInt32 (m_value);
 331                 }
 332
 333                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 334                 {
 335                         return System.Convert.ToUInt64 (m_value);
 336                 }
 337         }
 338 }