mcs/class/corlib/System/Int64.cs

   1 //
   2 // System.Int64.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 using System.Globalization;
  11
  12 namespace System {
  13
  14         public struct Int64 : IComparable, IFormattable { //, IConvertible {
  15
  16                 public const long MaxValue = 0x7fffffffffffffff;
  17                 public const long MinValue = -9223372036854775808;
  18
  19                 public long value;
  20
  21                 public int CompareTo (object v)
  22                 {
  23                         if (v == null)
  24                                 return 1;
  25
  26                         if (!(v is System.Int64))
  27                                 throw new ArgumentException (Locale.GetText ("Value is not a System.Int64"));
  28
  29                         if (value == (long) v)
  30                                 return 0;
  31
  32                         if (value < (long) v)
  33                                 return -1;
  34
  35                         return 1;
  36                 }
  37
  38                 public override bool Equals (object o)
  39                 {
  40                         if (!(o is System.Int64))
  41                                 return false;
  42
  43                         return ((long) o) == value;
  44                 }
  45
  46                 public override int GetHashCode ()
  47                 {
  48                         return (int)(value & 0xffffffff) ^ (int)(value >> 32);
  49                 }
  50
  51                 public static long Parse (string s)
  52                 {
  53                         long val = 0;
  54                         int len;
  55                         int i;
  56                         bool neg = false;
  57                         bool digits_seen = false;
  58
  59                         if (s == null)
  60                                 throw new ArgumentNullException (Locale.GetText ("s is null"));
  61
  62                         len = s.Length;
  63
  64                         char c;
  65                         for (i = 0; i < len; i++){
  66                                 c = s [i];
  67                                 if (!Char.IsWhiteSpace (c))
  68                                         break;
  69                         }
  70
  71                         if (i == len)
  72                                 throw new FormatException ();
  73
  74                         c = s [i];
  75                         if (c == '+')
  76                                 i++;
  77                         else if (c == '-'){
  78                                 neg = true;
  79                                 i++;
  80                         }
  81
  82                         for (; i < len; i++){
  83                                 c = s [i];
  84
  85                                 if (c >= '0' && c <= '9'){
  86                                         val = checked (val * 10 + (c - '0'));
  87                                         digits_seen = true;
  88                                 } else {
  89                                         if (Char.IsWhiteSpace (c)){
  90                                                 for (i++; i < len; i++){
  91                                                         if (!Char.IsWhiteSpace (s [i]))
  92                                                                 throw new FormatException ();
  93                                                 }
  94                                                 break;
  95                                         } else
  96                                                 throw new FormatException ();
  97                                 }
  98                         }
  99                         if (!digits_seen)
 100                                 throw new FormatException ();
 101
 102                         if (neg)
 103                                 val = -val;
 104
 105                         return val;
 106                 }
 107
 108                 public static long Parse (string s, IFormatProvider fp)
 109                 {
 110                         return Parse (s, NumberStyles.Integer, fp);
 111                 }
 112
 113                 public static long Parse (string s, NumberStyles style)
 114                 {
 115                         return Parse (s, style, null);
 116                 }
 117
 118                 [MonoTODO]
 119                 public static long Parse (string s, NumberStyles style, IFormatProvider fp)
 120                 {
 121                         // TODO: Implement me
 122                         // throw new NotImplementedException ();
 123                         // good enough for now
 124                         return Parse (s);
 125                 }
 126
 127                 public override string ToString ()
 128                 {
 129                         return ToString (null, null);
 130                 }
 131
 132                 public string ToString (IFormatProvider fp)
 133                 {
 134                         return ToString (null, fp);
 135                 }
 136
 137                 public string ToString (string format)
 138                 {
 139                         return ToString (format, null);
 140                 }
 141
 142                 public string ToString (string format, IFormatProvider fp)
 143                 {
 144                         NumberFormatInfo nfi = NumberFormatInfo.GetInstance( fp );
 145
 146                         if ( format == null )
 147                                 format = "G";
 148
 149                         return IntegerFormatter.NumberToString (format, nfi, value);
 150                 }
 151
 152                 // =========== IConvertible Methods =========== //
 153
 154                 public TypeCode GetTypeCode ()
 155                 {
 156                         return TypeCode.Int64;
 157                 }
 158         }
 159 }