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 #if NET_2_0
  37         [System.Runtime.InteropServices.ComVisible (true)]
  38 #endif
  39         public struct UInt16 : IFormattable, IConvertible, IComparable
  40 #if NET_2_0
  41                 , IComparable<UInt16>, IEquatable <UInt16>
  42 #endif
  43         {
  44                 public const ushort MaxValue = 0xffff;
  45                 public const ushort MinValue = 0;
  46
  47                 internal ushort m_value;
  48
  49                 public int CompareTo (object value)
  50                 {
  51                         if (value == null)
  52                                 return 1;
  53
  54                         if(!(value is System.UInt16))
  55                                 throw new ArgumentException (Locale.GetText ("Value is not a System.UInt16."));
  56
  57                         return this.m_value - ((ushort) value);
  58                 }
  59
  60                 public override bool Equals (object obj)
  61                 {
  62                         if (!(obj is System.UInt16))
  63                                 return false;
  64
  65                         return ((ushort) obj) == m_value;
  66                 }
  67
  68                 public override int GetHashCode ()
  69                 {
  70                         return m_value;
  71                 }
  72
  73 #if NET_2_0
  74                 public int CompareTo (ushort value)
  75                 {
  76                         if (m_value == value)
  77                                 return 0;
  78                         if (m_value > value)
  79                                 return 1;
  80                         else
  81                                 return -1;
  82                 }
  83
  84                 public bool Equals (ushort value)
  85                 {
  86                         return value == m_value;
  87                 }
  88 #endif
  89
  90                 internal static bool Parse (string s, bool tryParse, out ushort result, out Exception exc)
  91                 {
  92                         ushort val = 0;
  93                         int len;
  94                         int i;
  95                         bool digits_seen = false;
  96                         bool has_negative_sign = false;
  97
  98                         result = 0;
  99                         exc = null;
 100
 101                         if (s == null) {
 102                                 if (!tryParse)
 103                                         exc = new ArgumentNullException ("s");
 104                                 return false;
 105                         }
 106
 107                         len = s.Length;
 108
 109                         char c;
 110                         for (i = 0; i < len; i++) {
 111                                 c = s [i];
 112                                 if (!Char.IsWhiteSpace (c))
 113                                         break;
 114                         }
 115
 116                         if (i == len) {
 117                                 if (!tryParse)
 118                                         exc = Int32.GetFormatException ();
 119                                 return false;
 120                         }
 121
 122                         if (s [i] == '+')
 123                                 i++;
 124                         else
 125                                 if (s[i] == '-') {
 126                                         i++;
 127                                         has_negative_sign = true;
 128                                 }
 129
 130                         for (; i < len; i++) {
 131                                 c = s [i];
 132
 133                                 if (c >= '0' && c <= '9') {
 134                                         ushort d = (ushort) (c - '0');
 135
 136                                         val = checked ((ushort) (val * 10 + d));
 137                                         digits_seen = true;
 138                                 }
 139                                 else {
 140                                         if (Char.IsWhiteSpace (c)) {
 141                                                 for (i++; i < len; i++) {
 142                                                         if (!Char.IsWhiteSpace (s [i])) {
 143                                                                 if (!tryParse)
 144                                                                         exc = Int32.GetFormatException ();
 145                                                                 return false;
 146                                                         }
 147                                                 }
 148                                                 break;
 149                                         }
 150                                         else {
 151                                                 if (!tryParse)
 152                                                         exc = Int32.GetFormatException ();
 153                                                 return false;
 154                                         }
 155                                 }
 156                         }
 157                         if (!digits_seen) {
 158                                 if (!tryParse)
 159                                         exc = Int32.GetFormatException ();
 160                                 return false;
 161                         }
 162
 163                         // -0 is legal but other negative values are not
 164                         if (has_negative_sign && (val > 0)) {
 165                                 if (!tryParse)
 166                                         exc = new OverflowException (
 167                                             Locale.GetText ("Negative number"));
 168                                 return false;
 169                         }
 170
 171                         result = val;
 172                         return true;
 173                 }
 174
 175                 [CLSCompliant (false)]
 176                 public static ushort Parse (string s, IFormatProvider provider)
 177                 {
 178                         return Parse (s, NumberStyles.Integer, provider);
 179                 }
 180
 181                 [CLSCompliant (false)]
 182                 public static ushort Parse (string s, NumberStyles style)
 183                 {
 184                         return Parse (s, style, null);
 185                 }
 186
 187                 [CLSCompliant (false)]
 188                 public static ushort Parse (string s, NumberStyles style, IFormatProvider provider)
 189                 {
 190                         uint tmpResult = UInt32.Parse (s, style, provider);
 191                         if (tmpResult > UInt16.MaxValue || tmpResult < UInt16.MinValue)
 192                                 throw new OverflowException (Locale.GetText ("Value too large or too small."));
 193
 194                         return (ushort) tmpResult;
 195                 }
 196
 197                 [CLSCompliant(false)]
 198                 public static ushort Parse (string s)
 199                 {
 200                         Exception exc;
 201                         ushort res;
 202
 203                         if (!Parse (s, false, out res, out exc))
 204                                 throw exc;
 205
 206                         return res;
 207                 }
 208
 209 #if NET_2_0
 210                 [CLSCompliant(false)]
 211                 public static bool TryParse (string s, out ushort result)
 212                 {
 213                         Exception exc;
 214                         if (!Parse (s, true, out result, out exc)) {
 215                                 result = 0;
 216                                 return false;
 217                         }
 218
 219                         return true;
 220                 }
 221
 222                 [CLSCompliant(false)]
 223                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out ushort result)
 224                 {
 225                         uint tmpResult;
 226                         result = 0;
 227
 228                         if (!UInt32.TryParse (s, style, provider, out tmpResult))
 229                                 return false;
 230
 231                         if (tmpResult > UInt16.MaxValue || tmpResult < UInt16.MinValue)
 232                                 return false;
 233
 234                         result = (ushort)tmpResult;
 235                         return true;
 236                 }
 237 #endif
 238
 239                 public override string ToString ()
 240                 {
 241                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value));
 242                 }
 243
 244                 public string ToString (IFormatProvider provider)
 245                 {
 246                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value), provider);
 247                 }
 248
 249                 public string ToString (string format)
 250                 {
 251                         return ToString (format, null);
 252                 }
 253
 254                 public string ToString (string format, IFormatProvider provider)
 255                 {
 256                         NumberFormatInfo nfi = NumberFormatInfo.GetInstance (provider);
 257                         return NumberFormatter.NumberToString (format, m_value, nfi);
 258                 }
 259
 260                 // =========== IConvertible Methods =========== //
 261                 public TypeCode GetTypeCode ()
 262                 {
 263                         return TypeCode.UInt16;
 264                 }
 265
 266                 bool IConvertible.ToBoolean (IFormatProvider provider)
 267                 {
 268                         return System.Convert.ToBoolean (m_value);
 269                 }
 270
 271                 byte IConvertible.ToByte (IFormatProvider provider)
 272                 {
 273                         return System.Convert.ToByte (m_value);
 274                 }
 275
 276                 char IConvertible.ToChar (IFormatProvider provider)
 277                 {
 278                         return System.Convert.ToChar (m_value);
 279                 }
 280
 281                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 282                 {
 283                         return System.Convert.ToDateTime (m_value);
 284                 }
 285
 286                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 287                 {
 288                         return System.Convert.ToDecimal (m_value);
 289                 }
 290
 291                 double IConvertible.ToDouble (IFormatProvider provider)
 292                 {
 293                         return System.Convert.ToDouble (m_value);
 294                 }
 295
 296                 short IConvertible.ToInt16 (IFormatProvider provider)
 297                 {
 298                         return System.Convert.ToInt16 (m_value);
 299                 }
 300
 301                 int IConvertible.ToInt32 (IFormatProvider provider)
 302                 {
 303                         return System.Convert.ToInt32 (m_value);
 304                 }
 305
 306                 long IConvertible.ToInt64 (IFormatProvider provider)
 307                 {
 308                         return System.Convert.ToInt64 (m_value);
 309                 }
 310
 311                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 312                 {
 313                         return System.Convert.ToSByte (m_value);
 314                 }
 315
 316                 float IConvertible.ToSingle (IFormatProvider provider)
 317                 {
 318                         return System.Convert.ToSingle (m_value);
 319                 }
 320
 321                 object IConvertible.ToType (Type conversionType, IFormatProvider provider)
 322                 {
 323                         return System.Convert.ToType (m_value, conversionType, provider);
 324                 }
 325
 326                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 327                 {
 328                         return m_value;
 329                 }
 330
 331                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 332                 {
 333                         return System.Convert.ToUInt32 (m_value);
 334                 }
 335
 336                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 337                 {
 338                         return System.Convert.ToUInt64 (m_value);
 339                 }
 340         }
 341 }