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,
  37 #if NET_2_0
  38                 IComparable, IComparable<SByte>
  39 #else
  40                 IComparable
  41 #endif
  42         {
  43                 public const sbyte MinValue = -128;
  44                 public const sbyte MaxValue = 127;
  45
  46                 internal sbyte m_value;
  47
  48                 public int CompareTo (object v)
  49                 {
  50                         if (v == null)
  51                                 return 1;
  52
  53                         if (!(v is System.SByte))
  54                                 throw new ArgumentException (Locale.GetText ("Value is not a System.SByte."));
  55
  56                         sbyte xv = (sbyte) v;
  57                         if (m_value == xv)
  58                                 return 0;
  59                         if (m_value > xv)
  60                                 return 1;
  61                         else
  62                                 return -1;
  63                 }
  64
  65                 public override bool Equals (object o)
  66                 {
  67                         if (!(o is System.SByte))
  68                                 return false;
  69
  70                         return ((sbyte) o) == m_value;
  71                 }
  72
  73                 public override int GetHashCode ()
  74                 {
  75                         return m_value;
  76                 }
  77
  78 #if NET_2_0
  79                 public int CompareTo (sbyte value)
  80                 {
  81                         if (m_value == value)
  82                                 return 0;
  83                         if (m_value > value)
  84                                 return 1;
  85                         else
  86                                 return -1;
  87                 }
  88
  89                 public bool Equals (sbyte value)
  90                 {
  91                         return value == m_value;
  92                 }
  93 #endif
  94
  95                 internal static bool Parse (string s, bool tryParse, out sbyte result)
  96                 {
  97                         int ival = 0;
  98                         int len;
  99                         int i;
 100                         bool neg = false;
 101                         bool digits_seen = false;
 102
 103                         result = 0;
 104
 105                         if (s == null)
 106                                 if (tryParse)
 107                                         return false;
 108                                 else
 109                                         throw new ArgumentNullException ("s");
 110
 111                         len = s.Length;
 112
 113                         char c;
 114                         for (i = 0; i < len; i++) {
 115                                 c = s [i];
 116                                 if (!Char.IsWhiteSpace (c))
 117                                         break;
 118                         }
 119
 120                         if (i == len)
 121                                 if (tryParse)
 122                                         return false;
 123                                 else
 124                                         throw new FormatException ();
 125
 126                         c = s [i];
 127                         if (c == '+')
 128                                 i++;
 129                         else if (c == '-') {
 130                                 neg = true;
 131                                 i++;
 132                         }
 133
 134                         for (; i < len; i++) {
 135                                 c = s [i];
 136
 137                                 if (c >= '0' && c <= '9') {
 138                                         ival = checked (ival * 10 - (int) (c - '0'));
 139                                         digits_seen = true;
 140                                 } else {
 141                                         if (Char.IsWhiteSpace (c)) {
 142                                                 for (i++; i < len; i++) {
 143                                                         if (!Char.IsWhiteSpace (s [i]))
 144                                                                 if (tryParse)
 145                                                                         return false;
 146                                                                 else
 147                                                                         throw new FormatException ();
 148                                                 }
 149                                                 break;
 150                                         } else
 151                                                 if (tryParse)
 152                                                         return false;
 153                                                 else
 154                                                         throw new FormatException ();
 155                                 }
 156                         }
 157                         if (!digits_seen)
 158                                 if (tryParse)
 159                                         return false;
 160                                 else
 161                                         throw new FormatException ();
 162
 163                         ival = neg ? ival : -ival;
 164                         if (ival < SByte.MinValue || ival > SByte.MaxValue)
 165                                 if (tryParse)
 166                                         return false;
 167                                 else
 168                                         throw new OverflowException ();
 169
 170                         result = (sbyte)ival;
 171                         return true;
 172                 }
 173
 174                 [CLSCompliant(false)]
 175                 public static sbyte Parse (string s, IFormatProvider provider)
 176                 {
 177                         return Parse (s, NumberStyles.Integer, provider);
 178                 }
 179
 180                 [CLSCompliant(false)]
 181                 public static sbyte Parse (string s, NumberStyles style)
 182                 {
 183                         return Parse (s, style, null);
 184                 }
 185
 186                 [CLSCompliant(false)]
 187                 public static sbyte Parse (string s, NumberStyles style, IFormatProvider provider)
 188                 {
 189                         int tmpResult = Int32.Parse (s, style, provider);
 190                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 191                                 throw new OverflowException (Locale.GetText ("Value too large or too small."));
 192
 193                         return (sbyte) tmpResult;
 194                 }
 195
 196                 [CLSCompliant(false)]
 197                 public static sbyte Parse (string s) {
 198                         sbyte res;
 199
 200                         Parse (s, false, out res);
 201
 202                         return res;
 203                 }
 204
 205 #if NET_2_0
 206                 [CLSCompliant(false)]
 207                 public static bool TryParse (string s, out sbyte result) {
 208                         try {
 209                                 return Parse (s, true, out result);
 210                         }
 211                         catch (Exception) {
 212                                 result = 0;
 213                                 return false;
 214                         }
 215                 }
 216
 217                 [CLSCompliant(false)]
 218                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out sbyte result) {
 219                         try {
 220                                 int tmpResult;
 221
 222                                 if (!Int32.TryParse (s, style, provider, out tmpResult))
 223                                         return false;
 224                                 if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 225                                         return false;
 226                                 result = (sbyte)tmpResult;
 227                                 return true;
 228                         }
 229                         catch (Exception) {
 230                                 result = 0;
 231                                 return false;
 232                         }
 233                 }
 234 #endif
 235
 236                 public override string ToString ()
 237                 {
 238                         return ToString (null, null);
 239                 }
 240
 241                 public string ToString (IFormatProvider provider)
 242                 {
 243                         return ToString (null, 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
 255                         // use "G" when format is null or String.Empty
 256                         if ((format == null) || (format.Length == 0))
 257                                 format = "G";
 258
 259                         return IntegerFormatter.NumberToString (format, nfi, m_value);
 260                 }
 261
 262                 // =========== ICovnertible Methods =========== //
 263                 public TypeCode GetTypeCode ()
 264                 {
 265                         return TypeCode.SByte;
 266                 }
 267
 268                 bool IConvertible.ToBoolean (IFormatProvider provider)
 269                 {
 270                         return System.Convert.ToBoolean (m_value);
 271                 }
 272
 273                 byte IConvertible.ToByte (IFormatProvider provider)
 274                 {
 275                         return System.Convert.ToByte (m_value);
 276                 }
 277
 278                 char IConvertible.ToChar (IFormatProvider provider)
 279                 {
 280                         return System.Convert.ToChar (m_value);
 281                 }
 282
 283                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 284                 {
 285                         return System.Convert.ToDateTime (m_value);
 286                 }
 287
 288                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 289                 {
 290                         return System.Convert.ToDecimal (m_value);
 291                 }
 292
 293                 double IConvertible.ToDouble (IFormatProvider provider)
 294                 {
 295                         return System.Convert.ToDouble (m_value);
 296                 }
 297
 298                 short IConvertible.ToInt16 (IFormatProvider provider)
 299                 {
 300                         return System.Convert.ToInt16 (m_value);
 301                 }
 302
 303                 int IConvertible.ToInt32 (IFormatProvider provider)
 304                 {
 305                         return System.Convert.ToInt32 (m_value);
 306                 }
 307
 308                 long IConvertible.ToInt64 (IFormatProvider provider)
 309                 {
 310                         return System.Convert.ToInt64 (m_value);
 311                 }
 312
 313                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 314                 {
 315                         return m_value;
 316                 }
 317
 318                 float IConvertible.ToSingle (IFormatProvider provider)
 319                 {
 320                         return System.Convert.ToSingle (m_value);
 321                 }
 322
 323                 object IConvertible.ToType (Type conversionType, IFormatProvider provider)
 324                 {
 325                         return System.Convert.ToType (m_value, conversionType, provider);
 326                 }
 327
 328                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 329                 {
 330                         return System.Convert.ToUInt16 (m_value);
 331                 }
 332
 333                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 334                 {
 335                         return System.Convert.ToUInt32 (m_value);
 336                 }
 337
 338                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 339                 {
 340                         return System.Convert.ToUInt64 (m_value);
 341                 }
 342         }
 343 }