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)
  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
  97                         if (s == null)
  98                                 if (tryParse)
  99                                         return false;
 100                                 else
 101                                         throw new ArgumentNullException ("s");
 102
 103                         len = s.Length;
 104
 105                         char c;
 106                         for (i = 0; i < len; i++) {
 107                                 c = s [i];
 108                                 if (!Char.IsWhiteSpace (c))
 109                                         break;
 110                         }
 111
 112                         if (i == len)
 113                                 if (tryParse)
 114                                         return false;
 115                                 else
 116                                         throw new FormatException ();
 117
 118                         if (s [i] == '+')
 119                                 i++;
 120                         else
 121                                 if (s[i] == '-') {
 122                                         i++;
 123                                         has_negative_sign = true;
 124                                 }
 125
 126                         for (; i < len; i++) {
 127                                 c = s [i];
 128
 129                                 if (c >= '0' && c <= '9') {
 130                                         ushort d = (ushort) (c - '0');
 131
 132                                         val = checked ((ushort) (val * 10 + d));
 133                                         digits_seen = true;
 134                                 }
 135                                 else {
 136                                         if (Char.IsWhiteSpace (c)) {
 137                                                 for (i++; i < len; i++) {
 138                                                         if (!Char.IsWhiteSpace (s [i]))
 139                                                                 if (tryParse)
 140                                                                         return false;
 141                                                                 else
 142                                                                         throw new FormatException ();
 143                                                 }
 144                                                 break;
 145                                         }
 146                                         else
 147                                                 if (tryParse)
 148                                                         return false;
 149                                                 else
 150                                                         throw new FormatException ();
 151                                 }
 152                         }
 153                         if (!digits_seen)
 154                                 if (tryParse)
 155                                         return false;
 156                                 else
 157                                         throw new FormatException ();
 158
 159                         // -0 is legal but other negative values are not
 160                         if (has_negative_sign && (val > 0)) {
 161                                 if (tryParse)
 162                                         return false;
 163                                 else
 164                                         throw new OverflowException (
 165                                             Locale.GetText ("Negative number"));
 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                         ushort res;
 197
 198                         Parse (s, false, out res);
 199
 200                         return res;
 201                 }
 202
 203 #if NET_2_0
 204                 [CLSCompliant(false)]
 205                 public static bool TryParse (string s, out ushort result) {
 206                         try {
 207                                 return Parse (s, true, out result);
 208                         }
 209                         catch (Exception) {
 210                                 result = 0;
 211                                 return false;
 212                         }
 213                 }
 214
 215                 [CLSCompliant(false)]
 216                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out ushort result) {
 217                         try {
 218                                 uint tmpResult;
 219
 220                                 result = 0;
 221                                 if (!UInt32.TryParse (s, style, provider, out tmpResult))
 222                                         return false;
 223                                 if (tmpResult > UInt16.MaxValue || tmpResult < UInt16.MinValue)
 224                                         return false;
 225                                 result = (ushort)tmpResult;
 226                                 return true;
 227                         }
 228                         catch (Exception) {
 229                                 result = 0;
 230                                 return false;
 231                         }
 232                 }
 233 #endif
 234
 235                 public override string ToString ()
 236                 {
 237                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value));
 238                 }
 239
 240                 public string ToString (IFormatProvider provider)
 241                 {
 242                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value), provider);
 243                 }
 244
 245                 public string ToString (string format)
 246                 {
 247                         return ToString (format, null);
 248                 }
 249
 250                 public string ToString (string format, IFormatProvider provider)
 251                 {
 252                         NumberFormatInfo nfi = NumberFormatInfo.GetInstance (provider);
 253                         return NumberFormatter.NumberToString (format, m_value, nfi);
 254                 }
 255
 256                 // =========== IConvertible Methods =========== //
 257                 public TypeCode GetTypeCode ()
 258                 {
 259                         return TypeCode.UInt16;
 260                 }
 261
 262                 bool IConvertible.ToBoolean (IFormatProvider provider)
 263                 {
 264                         return System.Convert.ToBoolean (m_value);
 265                 }
 266
 267                 byte IConvertible.ToByte (IFormatProvider provider)
 268                 {
 269                         return System.Convert.ToByte (m_value);
 270                 }
 271
 272                 char IConvertible.ToChar (IFormatProvider provider)
 273                 {
 274                         return System.Convert.ToChar (m_value);
 275                 }
 276
 277                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 278                 {
 279                         return System.Convert.ToDateTime (m_value);
 280                 }
 281
 282                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 283                 {
 284                         return System.Convert.ToDecimal (m_value);
 285                 }
 286
 287                 double IConvertible.ToDouble (IFormatProvider provider)
 288                 {
 289                         return System.Convert.ToDouble (m_value);
 290                 }
 291
 292                 short IConvertible.ToInt16 (IFormatProvider provider)
 293                 {
 294                         return System.Convert.ToInt16 (m_value);
 295                 }
 296
 297                 int IConvertible.ToInt32 (IFormatProvider provider)
 298                 {
 299                         return System.Convert.ToInt32 (m_value);
 300                 }
 301
 302                 long IConvertible.ToInt64 (IFormatProvider provider)
 303                 {
 304                         return System.Convert.ToInt64 (m_value);
 305                 }
 306
 307                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 308                 {
 309                         return System.Convert.ToSByte (m_value);
 310                 }
 311
 312                 float IConvertible.ToSingle (IFormatProvider provider)
 313                 {
 314                         return System.Convert.ToSingle (m_value);
 315                 }
 316
 317                 object IConvertible.ToType (Type conversionType, IFormatProvider provider)
 318                 {
 319                         return System.Convert.ToType (m_value, conversionType, provider);
 320                 }
 321
 322                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 323                 {
 324                         return m_value;
 325                 }
 326
 327                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 328                 {
 329                         return System.Convert.ToUInt32 (m_value);
 330                 }
 331
 332                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 333                 {
 334                         return System.Convert.ToUInt64 (m_value);
 335                 }
 336         }
 337 }