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         [System.Runtime.InteropServices.ComVisible (true)]
  37         public struct SByte : IFormattable, IConvertible, IComparable, IComparable<SByte>, IEquatable <SByte>
  38         {
  39                 public const sbyte MinValue = -128;
  40                 public const sbyte MaxValue = 127;
  41
  42                 internal sbyte m_value;
  43
  44                 public int CompareTo (object obj)
  45                 {
  46                         if (obj == null)
  47                                 return 1;
  48
  49                         if (!(obj is System.SByte))
  50                                 throw new ArgumentException (Locale.GetText ("Value is not a System.SByte."));
  51
  52                         sbyte xv = (sbyte) obj;
  53                         if (m_value == xv)
  54                                 return 0;
  55                         if (m_value > xv)
  56                                 return 1;
  57                         else
  58                                 return -1;
  59                 }
  60
  61                 public override bool Equals (object obj)
  62                 {
  63                         if (!(obj is System.SByte))
  64                                 return false;
  65
  66                         return ((sbyte) obj) == m_value;
  67                 }
  68
  69                 public override int GetHashCode ()
  70                 {
  71                         return m_value;
  72                 }
  73
  74                 public int CompareTo (sbyte value)
  75                 {
  76                         if (m_value == value)
  77                                 return 0;
  78                         if (m_value > value)
  79                                 return 1;
  80                         else
  81                                 return -1;
  82                 }
  83
  84                 public bool Equals (sbyte obj)
  85                 {
  86                         return obj == m_value;
  87                 }
  88
  89                 internal static bool Parse (string s, bool tryParse, out sbyte result, out Exception exc)
  90                 {
  91                         int ival = 0;
  92                         int len;
  93                         int i;
  94                         bool neg = false;
  95                         bool digits_seen = false;
  96
  97                         result = 0;
  98                         exc = null;
  99
 100                         if (s == null) {
 101                                 if (!tryParse)
 102                                         exc = new ArgumentNullException ("s");
 103                                 return false;
 104                         }
 105
 106                         len = s.Length;
 107
 108                         char c;
 109                         for (i = 0; i < len; i++) {
 110                                 c = s [i];
 111                                 if (!Char.IsWhiteSpace (c))
 112                                         break;
 113                         }
 114
 115                         if (i == len) {
 116                                 if (!tryParse)
 117                                         exc = Int32.GetFormatException ();
 118                                 return false;
 119                         }
 120
 121                         c = s [i];
 122                         if (c == '+')
 123                                 i++;
 124                         else if (c == '-') {
 125                                 neg = true;
 126                                 i++;
 127                         }
 128
 129                         for (; i < len; i++) {
 130                                 c = s [i];
 131
 132                                 if (c >= '0' && c <= '9') {
 133                                         if (tryParse){
 134                                                 int intval = ival * 10 - (int) (c - '0');
 135
 136                                                 if (intval < MinValue)
 137                                                         return false;
 138                                                 ival = (sbyte) intval;
 139                                         } else
 140                                                 ival = checked (ival * 10 - (int) (c - '0'));
 141                                         digits_seen = true;
 142                                 } else {
 143                                         if (Char.IsWhiteSpace (c)) {
 144                                                 for (i++; i < len; i++) {
 145                                                         if (!Char.IsWhiteSpace (s [i])) {
 146                                                                 if (!tryParse)
 147                                                                         exc = Int32.GetFormatException ();
 148                                                                 return false;
 149                                                         }
 150                                                 }
 151                                                 break;
 152                                         } else {
 153                                                 if (!tryParse)
 154                                                         exc = Int32.GetFormatException ();
 155                                                 return false;
 156                                         }
 157                                 }
 158                         }
 159                         if (!digits_seen) {
 160                                 if (!tryParse)
 161                                         exc = Int32.GetFormatException ();
 162                                 return false;
 163                         }
 164
 165                         ival = neg ? ival : -ival;
 166                         if (ival < SByte.MinValue || ival > SByte.MaxValue) {
 167                                 if (!tryParse)
 168                                         exc = new OverflowException ();
 169                                 return false;
 170                         }
 171
 172                         result = (sbyte)ival;
 173                         return true;
 174                 }
 175
 176                 [CLSCompliant(false)]
 177                 public static sbyte Parse (string s, IFormatProvider provider)
 178                 {
 179                         return Parse (s, NumberStyles.Integer, provider);
 180                 }
 181
 182                 [CLSCompliant(false)]
 183                 public static sbyte Parse (string s, NumberStyles style)
 184                 {
 185                         return Parse (s, style, null);
 186                 }
 187
 188                 [CLSCompliant(false)]
 189                 public static sbyte Parse (string s, NumberStyles style, IFormatProvider provider)
 190                 {
 191                         int tmpResult = Int32.Parse (s, style, provider);
 192                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 193                                 throw new OverflowException (Locale.GetText ("Value too large or too small."));
 194
 195                         return (sbyte) tmpResult;
 196                 }
 197
 198                 [CLSCompliant(false)]
 199                 public static sbyte Parse (string s)
 200                 {
 201                         Exception exc;
 202                         sbyte res;
 203
 204                         if (!Parse (s, false, out res, out exc))
 205                                 throw exc;
 206
 207                         return res;
 208                 }
 209
 210                 [CLSCompliant(false)]
 211                 public static bool TryParse (string s, out sbyte result)
 212                 {
 213                         Exception exc;
 214                         if (!Parse (s, true, out result, out exc)) {
 215                                 result = 0;
 216                                 return false;
 217                         }
 218
 219                         return true;
 220                 }
 221
 222                 [CLSCompliant(false)]
 223                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out sbyte result)
 224                 {
 225                         int tmpResult;
 226                         result = 0;
 227
 228                         if (!Int32.TryParse (s, style, provider, out tmpResult))
 229                                 return false;
 230                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 231                                 return false;
 232
 233                         result = (sbyte)tmpResult;
 234                         return true;
 235                 }
 236
 237                 public override string ToString ()
 238                 {
 239                         return NumberFormatter.NumberToString (m_value, null);
 240                 }
 241
 242                 public string ToString (IFormatProvider provider)
 243                 {
 244                         return NumberFormatter.NumberToString (m_value, provider);
 245                 }
 246
 247                 public string ToString (string format)
 248                 {
 249                         return ToString (format, null);
 250                 }
 251
 252                 public string ToString (string format, IFormatProvider provider)
 253                 {
 254                         return NumberFormatter.NumberToString (format, m_value, provider);
 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 targetType, IFormatProvider provider)
 319                 {
 320                         if (targetType == null)
 321                                 throw new ArgumentNullException ("targetType");
 322                         return System.Convert.ToType (m_value, targetType, provider, false);
 323                 }
 324
 325                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 326                 {
 327                         return System.Convert.ToUInt16 (m_value);
 328                 }
 329
 330                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 331                 {
 332                         return System.Convert.ToUInt32 (m_value);
 333                 }
 334
 335                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 336                 {
 337                         return System.Convert.ToUInt64 (m_value);
 338                 }
 339         }
 340 }