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         [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                         return CompareTo ((sbyte) obj);
  53                 }
  54
  55                 public override bool Equals (object obj)
  56                 {
  57                         if (!(obj is System.SByte))
  58                                 return false;
  59
  60                         return ((sbyte) obj) == m_value;
  61                 }
  62
  63                 public override int GetHashCode ()
  64                 {
  65                         return m_value;
  66                 }
  67
  68                 public int CompareTo (sbyte value)
  69                 {
  70                         return m_value - value;
  71                 }
  72
  73                 public bool Equals (sbyte obj)
  74                 {
  75                         return obj == m_value;
  76                 }
  77
  78                 internal static bool Parse (string s, bool tryParse, out sbyte result, out Exception exc)
  79                 {
  80                         int ival = 0;
  81                         int len;
  82                         int i;
  83                         bool neg = false;
  84                         bool digits_seen = false;
  85
  86                         result = 0;
  87                         exc = null;
  88
  89                         if (s == null) {
  90                                 if (!tryParse)
  91                                         exc = new ArgumentNullException ("s");
  92                                 return false;
  93                         }
  94
  95                         len = s.Length;
  96
  97                         char c;
  98                         for (i = 0; i < len; i++) {
  99                                 c = s [i];
 100                                 if (!Char.IsWhiteSpace (c))
 101                                         break;
 102                         }
 103
 104                         if (i == len) {
 105                                 if (!tryParse)
 106                                         exc = Int32.GetFormatException ();
 107                                 return false;
 108                         }
 109
 110                         c = s [i];
 111                         if (c == '+')
 112                                 i++;
 113                         else if (c == '-') {
 114                                 neg = true;
 115                                 i++;
 116                         }
 117
 118                         for (; i < len; i++) {
 119                                 c = s [i];
 120
 121                                 if (c >= '0' && c <= '9') {
 122                                         if (tryParse){
 123                                                 int intval = ival * 10 - (int) (c - '0');
 124
 125                                                 if (intval < MinValue)
 126                                                         return false;
 127                                                 ival = (sbyte) intval;
 128                                         } else
 129                                                 ival = checked (ival * 10 - (int) (c - '0'));
 130                                         digits_seen = true;
 131                                 } else {
 132                                         if (Char.IsWhiteSpace (c)) {
 133                                                 for (i++; i < len; i++) {
 134                                                         if (!Char.IsWhiteSpace (s [i])) {
 135                                                                 if (!tryParse)
 136                                                                         exc = Int32.GetFormatException ();
 137                                                                 return false;
 138                                                         }
 139                                                 }
 140                                                 break;
 141                                         } else {
 142                                                 if (!tryParse)
 143                                                         exc = Int32.GetFormatException ();
 144                                                 return false;
 145                                         }
 146                                 }
 147                         }
 148                         if (!digits_seen) {
 149                                 if (!tryParse)
 150                                         exc = Int32.GetFormatException ();
 151                                 return false;
 152                         }
 153
 154                         ival = neg ? ival : -ival;
 155                         if (ival < SByte.MinValue || ival > SByte.MaxValue) {
 156                                 if (!tryParse)
 157                                         exc = new OverflowException ();
 158                                 return false;
 159                         }
 160
 161                         result = (sbyte)ival;
 162                         return true;
 163                 }
 164
 165                 [CLSCompliant(false)]
 166                 public static sbyte Parse (string s, IFormatProvider provider)
 167                 {
 168                         return Parse (s, NumberStyles.Integer, provider);
 169                 }
 170
 171                 [CLSCompliant(false)]
 172                 public static sbyte Parse (string s, NumberStyles style)
 173                 {
 174                         return Parse (s, style, null);
 175                 }
 176
 177                 [CLSCompliant(false)]
 178                 public static sbyte Parse (string s, NumberStyles style, IFormatProvider provider)
 179                 {
 180                         int tmpResult = Int32.Parse (s, style, provider);
 181                         if ((style & NumberStyles.AllowHexSpecifier) != 0) {
 182                                 if (tmpResult >= 0 && tmpResult <= byte.MaxValue)
 183                                         return (sbyte) tmpResult;
 184                         } else if (tmpResult <= MaxValue && tmpResult >= MinValue) {
 185                                 return (sbyte) tmpResult;
 186                         }
 187
 188                         throw new OverflowException (Locale.GetText ("Value too large or too small."));
 189                 }
 190
 191                 [CLSCompliant(false)]
 192                 public static sbyte Parse (string s)
 193                 {
 194                         Exception exc;
 195                         sbyte res;
 196
 197                         if (!Parse (s, false, out res, out exc))
 198                                 throw exc;
 199
 200                         return res;
 201                 }
 202
 203                 [CLSCompliant(false)]
 204                 public static bool TryParse (string s, out sbyte result)
 205                 {
 206                         Exception exc;
 207                         if (!Parse (s, true, out result, out exc)) {
 208                                 result = 0;
 209                                 return false;
 210                         }
 211
 212                         return true;
 213                 }
 214
 215                 [CLSCompliant(false)]
 216                 public static bool TryParse (string s, NumberStyles style, IFormatProvider provider, out sbyte result)
 217                 {
 218                         int tmpResult;
 219                         result = 0;
 220
 221                         if (!Int32.TryParse (s, style, provider, out tmpResult))
 222                                 return false;
 223                         if (tmpResult > SByte.MaxValue || tmpResult < SByte.MinValue)
 224                                 return false;
 225
 226                         result = (sbyte)tmpResult;
 227                         return true;
 228                 }
 229
 230                 public override string ToString ()
 231                 {
 232                         return NumberFormatter.NumberToString (m_value, null);
 233                 }
 234
 235                 public string ToString (IFormatProvider provider)
 236                 {
 237                         return NumberFormatter.NumberToString (m_value, provider);
 238                 }
 239
 240                 public string ToString (string format)
 241                 {
 242                         return ToString (format, null);
 243                 }
 244
 245                 public string ToString (string format, IFormatProvider provider)
 246                 {
 247                         return NumberFormatter.NumberToString (format, m_value, provider);
 248                 }
 249
 250                 // =========== ICovnertible Methods =========== //
 251                 public TypeCode GetTypeCode ()
 252                 {
 253                         return TypeCode.SByte;
 254                 }
 255
 256                 bool IConvertible.ToBoolean (IFormatProvider provider)
 257                 {
 258                         return System.Convert.ToBoolean (m_value);
 259                 }
 260
 261                 byte IConvertible.ToByte (IFormatProvider provider)
 262                 {
 263                         return System.Convert.ToByte (m_value);
 264                 }
 265
 266                 char IConvertible.ToChar (IFormatProvider provider)
 267                 {
 268                         return System.Convert.ToChar (m_value);
 269                 }
 270
 271                 DateTime IConvertible.ToDateTime (IFormatProvider provider)
 272                 {
 273                         return System.Convert.ToDateTime (m_value);
 274                 }
 275
 276                 decimal IConvertible.ToDecimal (IFormatProvider provider)
 277                 {
 278                         return System.Convert.ToDecimal (m_value);
 279                 }
 280
 281                 double IConvertible.ToDouble (IFormatProvider provider)
 282                 {
 283                         return System.Convert.ToDouble (m_value);
 284                 }
 285
 286                 short IConvertible.ToInt16 (IFormatProvider provider)
 287                 {
 288                         return System.Convert.ToInt16 (m_value);
 289                 }
 290
 291                 int IConvertible.ToInt32 (IFormatProvider provider)
 292                 {
 293                         return System.Convert.ToInt32 (m_value);
 294                 }
 295
 296                 long IConvertible.ToInt64 (IFormatProvider provider)
 297                 {
 298                         return System.Convert.ToInt64 (m_value);
 299                 }
 300
 301                 sbyte IConvertible.ToSByte (IFormatProvider provider)
 302                 {
 303                         return m_value;
 304                 }
 305
 306                 float IConvertible.ToSingle (IFormatProvider provider)
 307                 {
 308                         return System.Convert.ToSingle (m_value);
 309                 }
 310
 311                 object IConvertible.ToType (Type targetType, IFormatProvider provider)
 312                 {
 313                         if (targetType == null)
 314                                 throw new ArgumentNullException ("targetType");
 315                         return System.Convert.ToType (m_value, targetType, provider, false);
 316                 }
 317
 318                 ushort IConvertible.ToUInt16 (IFormatProvider provider)
 319                 {
 320                         return System.Convert.ToUInt16 (m_value);
 321                 }
 322
 323                 uint IConvertible.ToUInt32 (IFormatProvider provider)
 324                 {
 325                         return System.Convert.ToUInt32 (m_value);
 326                 }
 327
 328                 ulong IConvertible.ToUInt64 (IFormatProvider provider)
 329                 {
 330                         return System.Convert.ToUInt64 (m_value);
 331                 }
 332         }
 333 }