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