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 #if NET_2_0
  37         [System.Runtime.InteropServices.ComVisible (true)]
  38 #endif
  39         public struct SByte : IFormattable, IConvertible, IComparable
  40 #if NET_2_0
  41                 , IComparable<SByte>, IEquatable <SByte>
  42 #endif
  43         {
  44                 public const sbyte MinValue = -128;
  45                 public const sbyte MaxValue = 127;
  46
  47                 internal sbyte m_value;
  48
  49                 public int CompareTo (object obj)
  50                 {
  51                         if (obj == null)
  52                                 return 1;
  53
  54                         if (!(obj is System.SByte))
  55                                 throw new ArgumentException (Locale.GetText ("Value is not a System.SByte."));
  56
  57                         sbyte xv = (sbyte) obj;
  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 obj)
  67                 {
  68                         if (!(obj is System.SByte))
  69                                 return false;
  70
  71                         return ((sbyte) obj) == 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 (sbyte 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 (sbyte obj)
  91                 {
  92                         return obj == m_value;
  93                 }
  94 #endif
  95
  96                 internal static bool Parse (string s, bool tryParse, out sbyte result, out Exception exc)
  97                 {
  98                         int ival = 0;
  99                         int len;
 100                         int i;
 101                         bool neg = false;
 102                         bool digits_seen = false;
 103
 104                         result = 0;
 105                         exc = null;
 106
 107                         if (s == null) {
 108                                 if (!tryParse)
 109                                         exc = new ArgumentNullException ("s");
 110                                 return false;
 111                         }
 112
 113                         len = s.Length;
 114
 115                         char c;
 116                         for (i = 0; i < len; i++) {
 117                                 c = s [i];
 118                                 if (!Char.IsWhiteSpace (c))
 119                                         break;
 120                         }
 121
 122                         if (i == len) {
 123                                 if (!tryParse)
 124                                         exc = Int32.GetFormatException ();
 125                                 return false;
 126                         }
 127
 128                         c = s [i];
 129                         if (c == '+')
 130                                 i++;
 131                         else if (c == '-') {
 132                                 neg = true;
 133                                 i++;
 134                         }
 135
 136                         for (; i < len; i++) {
 137                                 c = s [i];
 138
 139                                 if (c >= '0' && c <= '9') {
 140                                         if (tryParse){
 141                                                 int intval = ival * 10 - (int) (c - '0');
 142
 143                                                 if (intval < MinValue)
 144                                                         return false;
 145                                                 ival = (sbyte) intval;
 146                                         } else
 147                                                 ival = checked (ival * 10 - (int) (c - '0'));
 148                                         digits_seen = true;
 149                                 } else {
 150                                         if (Char.IsWhiteSpace (c)) {
 151                                                 for (i++; i < len; i++) {
 152                                                         if (!Char.IsWhiteSpace (s [i])) {
 153                                                                 if (!tryParse)
 154                                                                         exc = Int32.GetFormatException ();
 155                                                                 return false;
 156                                                         }
 157                                                 }
 158                                                 break;
 159                                         } else {
 160                                                 if (!tryParse)
 161                                                         exc = Int32.GetFormatException ();
 162                                                 return false;
 163                                         }
 164                                 }
 165                         }
 166                         if (!digits_seen) {
 167                                 if (!tryParse)
 168                                         exc = Int32.GetFormatException ();
 169                                 return false;
 170                         }
 171
 172                         ival = neg ? ival : -ival;
 173                         if (ival < SByte.MinValue || ival > SByte.MaxValue) {
 174                                 if (!tryParse)
 175                                         exc = new OverflowException ();
 176                                 return false;
 177                         }
 178
 179                         result = (sbyte)ival;
 180                         return true;
 181                 }
 182
 183                 [CLSCompliant(false)]
 184                 public static sbyte Parse (string s, IFormatProvider provider)
 185                 {
 186                         return Parse (s, NumberStyles.Integer, provider);
 187                 }
 188
 189                 [CLSCompliant(false)]
 190                 public static sbyte Parse (string s, NumberStyles style)
 191                 {
 192                         return Parse (s, style, null);
 193                 }
 194
 195                 [CLSCompliant(false)]
 196                 public static sbyte Parse (string s, NumberStyles style, IFormatProvider provider)
 197                 {
 198                         int tmpResult = Int32.Parse (s, style, provider);
 199                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 200                                 throw new OverflowException (Locale.GetText ("Value too large or too small."));
 201
 202                         return (sbyte) tmpResult;
 203                 }
 204
 205                 [CLSCompliant(false)]
 206                 public static sbyte Parse (string s)
 207                 {
 208                         Exception exc;
 209                         sbyte res;
 210
 211                         if (!Parse (s, false, out res, out exc))
 212                                 throw exc;
 213
 214                         return res;
 215                 }
 216
 217 #if NET_2_0
 218                 [CLSCompliant(false)]
 219                 public static bool TryParse (string s, out sbyte result)
 220                 {
 221                         Exception exc;
 222                         if (!Parse (s, true, out result, out exc)) {
 223                                 result = 0;
 224                                 return false;
 225                         }
 226
 227                         return true;
 228                 }
 229
 230                 [CLSCompliant(false)]
 231                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out sbyte result)
 232                 {
 233                         int tmpResult;
 234                         result = 0;
 235
 236                         if (!Int32.TryParse (s, style, provider, out tmpResult))
 237                                 return false;
 238                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 239                                 return false;
 240
 241                         result = (sbyte)tmpResult;
 242                         return true;
 243                 }
 244 #endif
 245
 246                 public override string ToString ()
 247                 {
 248                         return NumberFormatter.NumberToString (m_value, null);
 249                 }
 250
 251                 public string ToString (IFormatProvider provider)
 252                 {
 253                         return NumberFormatter.NumberToString (m_value, provider);
 254                 }
 255
 256                 public string ToString (string format)
 257                 {
 258                         return ToString (format, null);
 259                 }
 260
 261                 public string ToString (string format, IFormatProvider provider)
 262                 {
 263                         return NumberFormatter.NumberToString (format, m_value, provider);
 264                 }
 265
 266                 // =========== ICovnertible Methods =========== //
 267                 public TypeCode GetTypeCode ()
 268                 {
 269                         return TypeCode.SByte;
 270                 }
 271
 272                 bool IConvertible.ToBoolean (IFormatProvider provider)
 273                 {
 274                         return System.Convert.ToBoolean (m_value);
 275                 }
 276
 277                 byte IConvertible.ToByte (IFormatProvider provider)
 278                 {
 279                         return System.Convert.ToByte (m_value);
 280                 }
 281
 282                 char IConvertible.ToChar (IFormatProvider provider)
 283                 {
 284                         return System.Convert.ToChar (m_value);
 285                 }
 286
 287                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 288                 {
 289                         return System.Convert.ToDateTime (m_value);
 290                 }
 291
 292                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 293                 {
 294                         return System.Convert.ToDecimal (m_value);
 295                 }
 296
 297                 double IConvertible.ToDouble (IFormatProvider provider)
 298                 {
 299                         return System.Convert.ToDouble (m_value);
 300                 }
 301
 302                 short IConvertible.ToInt16 (IFormatProvider provider)
 303                 {
 304                         return System.Convert.ToInt16 (m_value);
 305                 }
 306
 307                 int IConvertible.ToInt32 (IFormatProvider provider)
 308                 {
 309                         return System.Convert.ToInt32 (m_value);
 310                 }
 311
 312                 long IConvertible.ToInt64 (IFormatProvider provider)
 313                 {
 314                         return System.Convert.ToInt64 (m_value);
 315                 }
 316
 317                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 318                 {
 319                         return m_value;
 320                 }
 321
 322                 float IConvertible.ToSingle (IFormatProvider provider)
 323                 {
 324                         return System.Convert.ToSingle (m_value);
 325                 }
 326
 327                 object IConvertible.ToType (Type targetType, IFormatProvider provider)
 328                 {
 329                         if (targetType == null)
 330                                 throw new ArgumentNullException ("targetType");
 331                         return System.Convert.ToType (m_value, targetType, provider, false);
 332                 }
 333
 334                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 335                 {
 336                         return System.Convert.ToUInt16 (m_value);
 337                 }
 338
 339                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 340                 {
 341                         return System.Convert.ToUInt32 (m_value);
 342                 }
 343
 344                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 345                 {
 346                         return System.Convert.ToUInt64 (m_value);
 347                 }
 348         }
 349 }