mcs/class/corlib/System/SByte.cs

   1 //
   2 // System.SByte.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         [CLSCompliant(false)]
  35         [Serializable]
  36         public struct SByte : IFormattable, IConvertible, IComparable
  37 #if NET_2_0
  38                 , IComparable<SByte>, IEquatable <SByte>
  39 #endif
  40         {
  41                 public const sbyte MinValue = -128;
  42                 public const sbyte MaxValue = 127;
  43
  44                 internal sbyte m_value;
  45
  46                 public int CompareTo (object v)
  47                 {
  48                         if (v == null)
  49                                 return 1;
  50
  51                         if (!(v is System.SByte))
  52                                 throw new ArgumentException (Locale.GetText ("Value is not a System.SByte."));
  53
  54                         sbyte xv = (sbyte) 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.SByte))
  66                                 return false;
  67
  68                         return ((sbyte) 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 (sbyte 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 (sbyte value)
  88                 {
  89                         return value == m_value;
  90                 }
  91 #endif
  92
  93                 internal static bool Parse (string s, bool tryParse, out sbyte result, out Exception exc)
  94                 {
  95                         int ival = 0;
  96                         int len;
  97                         int i;
  98                         bool neg = false;
  99                         bool digits_seen = false;
 100
 101                         result = 0;
 102                         exc = null;
 103
 104                         if (s == null) {
 105                                 if (!tryParse)
 106                                         exc = new ArgumentNullException ("s");
 107                                 return false;
 108                         }
 109
 110                         len = s.Length;
 111
 112                         char c;
 113                         for (i = 0; i < len; i++) {
 114                                 c = s [i];
 115                                 if (!Char.IsWhiteSpace (c))
 116                                         break;
 117                         }
 118
 119                         if (i == len) {
 120                                 if (!tryParse)
 121                                         exc = Int32.GetFormatException ();
 122                                 return false;
 123                         }
 124
 125                         c = s [i];
 126                         if (c == '+')
 127                                 i++;
 128                         else if (c == '-') {
 129                                 neg = true;
 130                                 i++;
 131                         }
 132
 133                         for (; i < len; i++) {
 134                                 c = s [i];
 135
 136                                 if (c >= '0' && c <= '9') {
 137                                         ival = checked (ival * 10 - (int) (c - '0'));
 138                                         digits_seen = true;
 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                                         } else {
 150                                                 if (!tryParse)
 151                                                         exc = Int32.GetFormatException ();
 152                                                 return false;
 153                                         }
 154                                 }
 155                         }
 156                         if (!digits_seen) {
 157                                 if (!tryParse)
 158                                         exc = Int32.GetFormatException ();
 159                                 return false;
 160                         }
 161
 162                         ival = neg ? ival : -ival;
 163                         if (ival < SByte.MinValue || ival > SByte.MaxValue) {
 164                                 if (!tryParse)
 165                                         exc = new OverflowException ();
 166                                 return false;
 167                         }
 168
 169                         result = (sbyte)ival;
 170                         return true;
 171                 }
 172
 173                 [CLSCompliant(false)]
 174                 public static sbyte Parse (string s, IFormatProvider provider)
 175                 {
 176                         return Parse (s, NumberStyles.Integer, provider);
 177                 }
 178
 179                 [CLSCompliant(false)]
 180                 public static sbyte Parse (string s, NumberStyles style)
 181                 {
 182                         return Parse (s, style, null);
 183                 }
 184
 185                 [CLSCompliant(false)]
 186                 public static sbyte Parse (string s, NumberStyles style, IFormatProvider provider)
 187                 {
 188                         int tmpResult = Int32.Parse (s, style, provider);
 189                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 190                                 throw new OverflowException (Locale.GetText ("Value too large or too small."));
 191
 192                         return (sbyte) tmpResult;
 193                 }
 194
 195                 [CLSCompliant(false)]
 196                 public static sbyte Parse (string s)
 197                 {
 198                         Exception exc;
 199                         sbyte res;
 200
 201                         if (!Parse (s, false, out res, out exc))
 202                                 throw exc;
 203
 204                         return res;
 205                 }
 206
 207 #if NET_2_0
 208                 [CLSCompliant(false)]
 209                 public static bool TryParse (string s, out sbyte result)
 210                 {
 211                         Exception exc;
 212                         if (!Parse (s, true, out result, out exc)) {
 213                                 result = 0;
 214                                 return false;
 215                         }
 216
 217                         return true;
 218                 }
 219
 220                 [CLSCompliant(false)]
 221                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out sbyte result)
 222                 {
 223                         int tmpResult;
 224                         result = 0;
 225
 226                         if (!Int32.TryParse (s, style, provider, out tmpResult))
 227                                 return false;
 228                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 229                                 return false;
 230
 231                         result = (sbyte)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                 // =========== ICovnertible Methods =========== //
 258                 public TypeCode GetTypeCode ()
 259                 {
 260                         return TypeCode.SByte;
 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 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 System.Convert.ToUInt16 (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 }