mcs/class/corlib/System/Int16.cs

   1 //
   2 // System.Int16.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 #if NET_2_0
  36         [System.Runtime.InteropServices.ComVisible (true)]
  37 #endif
  38         public struct Int16 : IFormattable, IConvertible, IComparable
  39 #if NET_2_0
  40                 , IComparable<Int16>, IEquatable <Int16>
  41 #endif
  42         {
  43
  44                 public const short MaxValue =  32767;
  45                 public const short MinValue = -32768;
  46
  47                 internal short m_value;
  48
  49                 public int CompareTo (object v)
  50                 {
  51                         if (v == null)
  52                                 return 1;
  53
  54                         if (!(v is System.Int16))
  55                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Int16"));
  56
  57                         short xv = (short) v;
  58                         if (m_value == xv)
  59                                 return 0;
  60                         if (m_value > xv)
  61                                 return 1;
  62                         else
  63                                 return -1;
  64                 }
  65
  66                 public override bool Equals (object o)
  67                 {
  68                         if (!(o is System.Int16))
  69                                 return false;
  70
  71                         return ((short) o) == m_value;
  72                 }
  73
  74                 public override int GetHashCode ()
  75                 {
  76                         return m_value;
  77                 }
  78
  79 #if NET_2_0
  80                 public int CompareTo (short value)
  81                 {
  82                         if (m_value == value)
  83                                 return 0;
  84                         if (m_value > value)
  85                                 return 1;
  86                         else
  87                                 return -1;
  88                 }
  89
  90                 public bool Equals (short value)
  91                 {
  92                         return value == m_value;
  93                 }
  94 #endif
  95
  96                 internal static bool Parse (string s, bool tryParse, out short result, out Exception exc)
  97                 {
  98                         short val = 0;
  99                         int len;
 100                         int i, sign = 1;
 101                         bool digits_seen = false;
 102
 103                         result = 0;
 104                         exc = null;
 105
 106                         if (s == null) {
 107                                 if (!tryParse)
 108                                         exc = new ArgumentNullException ("s");
 109                                 return false;
 110                         }
 111
 112                         len = s.Length;
 113
 114                         char c;
 115                         for (i = 0; i < len; i++){
 116                                 c = s [i];
 117                                 if (!Char.IsWhiteSpace (c))
 118                                         break;
 119                         }
 120
 121                         if (i == len) {
 122                                 if (!tryParse)
 123                                         exc = Int32.GetFormatException ();
 124                                 return false;
 125                         }
 126
 127                         c = s [i];
 128                         if (c == '+')
 129                                 i++;
 130                         else if (c == '-'){
 131                                 sign = -1;
 132                                 i++;
 133                         }
 134
 135                         for (; i < len; i++){
 136                                 c = s [i];
 137
 138                                 if (c >= '0' && c <= '9'){
 139                                         val = checked ((short) (val * 10 + (c - '0') * sign));
 140                                         digits_seen = true;
 141                                 } else {
 142                                         if (Char.IsWhiteSpace (c)){
 143                                                 for (i++; i < len; i++){
 144                                                         if (!Char.IsWhiteSpace (s [i])) {
 145                                                                 if (!tryParse)
 146                                                                         exc = Int32.GetFormatException ();
 147                                                                 return false;
 148                                                         }
 149                                                 }
 150                                                 break;
 151                                         } else {
 152                                                 if (!tryParse)
 153                                                         exc = Int32.GetFormatException ();
 154                                                 return false;
 155                                         }
 156                                 }
 157                         }
 158                         if (!digits_seen) {
 159                                 if (!tryParse)
 160                                         exc = Int32.GetFormatException ();
 161                                 return false;
 162                         }
 163
 164                         result = val;
 165                         return true;
 166                 }
 167
 168                 public static short Parse (string s, IFormatProvider fp)
 169                 {
 170                         return Parse (s, NumberStyles.Integer, fp);
 171                 }
 172
 173                 public static short Parse (string s, NumberStyles style)
 174                 {
 175                         return Parse (s, style, null);
 176                 }
 177
 178                 public static short Parse (string s, NumberStyles style, IFormatProvider fp)
 179                 {
 180                         int tmpResult = Int32.Parse (s, style, fp);
 181                         if (tmpResult > Int16.MaxValue || tmpResult < Int16.MinValue)
 182                                 throw new OverflowException ("Value too large or too small.");
 183
 184                         return (short) tmpResult;
 185                 }
 186
 187                 public static short Parse (string s)
 188                 {
 189                         Exception exc;
 190                         short res;
 191
 192                         if (!Parse (s, false, out res, out exc))
 193                                 throw exc;
 194
 195                         return res;
 196                 }
 197
 198 #if NET_2_0
 199                 public static bool TryParse (string s, out short result)
 200                 {
 201                         Exception exc;
 202                         if (!Parse (s, true, out result, out exc)) {
 203                                 result = 0;
 204                                 return false;
 205                         }
 206
 207                         return true;
 208                 }
 209
 210                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out short result)
 211                 {
 212                         int tmpResult;
 213                         result = 0;
 214
 215                         if (!Int32.TryParse (s, style, provider, out tmpResult))
 216                                 return false;
 217
 218                         if (tmpResult > Int16.MaxValue || tmpResult < Int16.MinValue)
 219                                 return false;
 220
 221                         result = (short)tmpResult;
 222                         return true;
 223                 }
 224 #endif
 225
 226                 public override string ToString ()
 227                 {
 228                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value));
 229                 }
 230
 231                 public string ToString (IFormatProvider fp)
 232                 {
 233                         return NumberFormatter.FormatGeneral (new NumberFormatter.NumberStore (m_value), fp);
 234                 }
 235
 236                 public string ToString (string format)
 237                 {
 238                         return ToString (format, null);
 239                 }
 240
 241                 public string ToString (string format, IFormatProvider fp)
 242                 {
 243                         NumberFormatInfo nfi = NumberFormatInfo.GetInstance( fp );
 244                         return NumberFormatter.NumberToString(format, m_value, nfi);
 245                 }
 246
 247                 // =========== IConvertible Methods =========== //
 248
 249                 public TypeCode GetTypeCode ()
 250                 {
 251                         return TypeCode.Int16;
 252                 }
 253
 254                 bool IConvertible.ToBoolean (IFormatProvider provider)
 255                 {
 256                         return System.Convert.ToBoolean (m_value);
 257                 }
 258
 259                 byte IConvertible.ToByte (IFormatProvider provider)
 260                 {
 261                         return System.Convert.ToByte (m_value);
 262                 }
 263
 264                 char IConvertible.ToChar (IFormatProvider provider)
 265                 {
 266                         return System.Convert.ToChar (m_value);
 267                 }
 268
 269                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 270                 {
 271                         return System.Convert.ToDateTime (m_value);
 272                 }
 273
 274                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 275                 {
 276                         return System.Convert.ToDecimal (m_value);
 277                 }
 278
 279                 double IConvertible.ToDouble (IFormatProvider provider)
 280                 {
 281                         return System.Convert.ToDouble (m_value);
 282                 }
 283
 284                 short IConvertible.ToInt16 (IFormatProvider provider)
 285                 {
 286                         return System.Convert.ToInt16 (m_value);
 287                 }
 288
 289                 int IConvertible.ToInt32 (IFormatProvider provider)
 290                 {
 291                         return System.Convert.ToInt32 (m_value);
 292                 }
 293
 294                 long IConvertible.ToInt64 (IFormatProvider provider)
 295                 {
 296                         return System.Convert.ToInt64 (m_value);
 297                 }
 298
 299                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 300                 {
 301                         return System.Convert.ToSByte (m_value);
 302                 }
 303
 304                 float IConvertible.ToSingle (IFormatProvider provider)
 305                 {
 306                         return System.Convert.ToSingle (m_value);
 307                 }
 308
 309                 object IConvertible.ToType (Type conversionType, IFormatProvider provider)
 310                 {
 311                         return System.Convert.ToType (m_value, conversionType, provider);
 312                 }
 313
 314                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 315                 {
 316                         return System.Convert.ToUInt16 (m_value);
 317                 }
 318
 319                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 320                 {
 321                         return System.Convert.ToUInt32 (m_value);
 322                 }
 323
 324                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 325                 {
 326                         return System.Convert.ToUInt64 (m_value);
 327                 }
 328         }
 329 }