//
// Author:
// Miguel de Icaza (miguel@ximian.com)
+// Bob Smith (bob@thestuff.net)
//
// (C) Ximian, Inc. http://www.ximian.com
+// (C) Bob Smith. http://www.thestuff.net
//
using System.Globalization;
+using System.Runtime.CompilerServices;
namespace System {
- public struct Double : IComparable, IFormattable { //, IConvertible {
+ [Serializable]
+ public struct Double : IComparable, IFormattable, IConvertible {
public const double Epsilon = 4.9406564584124650e-324;
public const double MaxValue = 1.7976931348623157e308;
public const double MinValue = -1.7976931348623157e308;
public int CompareTo (object v)
{
+ if (v == null)
+ return 1;
+
if (!(v is System.Double))
- throw new ArgumentException ("Value is not a System.Double");
+ throw new ArgumentException (Locale.GetText ("Value is not a System.Double"));
- return (int) (value - ((double) v));
+ double dv = (double)v;
+
+ if (IsPositiveInfinity(value) && IsPositiveInfinity(dv))
+ return 0;
+
+ if (IsNegativeInfinity(value) && IsNegativeInfinity(dv))
+ return 0;
+
+ if (IsNaN(dv))
+ if (IsNaN(value))
+ return 0;
+ else
+ return 1;
+
+ if (IsNaN(value))
+ if (IsNaN(dv))
+ return 0;
+ else
+ return -1;
+
+ if (value > dv) return 1;
+ else if (value < dv) return -1;
+ else return 0;
}
public override bool Equals (object o)
if (!(o is System.Double))
return false;
+ if (IsNaN ((double)o)) {
+ if (IsNaN(value))
+ return true;
+ else
+ return false;
+ }
+
return ((double) o) == value;
}
return Parse (s, style, null);
}
- public static double Parse (string s, NumberStyles style, IFormatProvider fp)
+ // We're intentionally using constants here to avoid some bigger headaches in mcs.
+ // This struct must be compiled before System.Enum so we can't use enums here.
+ private const int State_AllowSign = 1;
+ private const int State_Digits = 2;
+ private const int State_Decimal = 3;
+ private const int State_ExponentSign = 4;
+ private const int State_Exponent = 5;
+ private const int State_ConsumeWhiteSpace = 6;
+
+ [MonoTODO("check if digits are group in correct numbers between the group separators")]
+ public static double Parse (string s, NumberStyles style, IFormatProvider provider)
{
- // TODO: Implement me
- return 0;
+ if (s == null) throw new ArgumentNullException();
+ if (style > NumberStyles.Any)
+ {
+ throw new ArgumentException();
+ }
+ NumberFormatInfo format = NumberFormatInfo.GetInstance(provider);
+ if (format == null) throw new Exception("How did this happen?");
+ if (s == format.NaNSymbol) return Double.NaN;
+ if (s == format.PositiveInfinitySymbol) return Double.PositiveInfinity;
+ if (s == format.NegativeInfinitySymbol) return Double.NegativeInfinity;
+
+ //
+ // validate and prepare string for C
+ //
+ int len = s.Length;
+ byte [] b = new byte [len + 1];
+ int didx = 0;
+ int sidx = 0;
+ char c;
+
+ if ((style & NumberStyles.AllowLeadingWhite) != 0){
+ while (sidx < len && Char.IsWhiteSpace (c = s [sidx]))
+ sidx++;
+
+ if (sidx == len)
+ throw new FormatException();
+ }
+
+ bool allow_trailing_white = ((style & NumberStyles.AllowTrailingWhite) != 0);
+
+ //
+ // Machine state
+ //
+ int state = State_AllowSign;
+
+ //
+ // Setup
+ //
+ string decimal_separator = null;
+ string group_separator = null;
+ int decimal_separator_len = 0;
+ int group_separator_len = 0;
+ if ((style & NumberStyles.AllowDecimalPoint) != 0){
+ decimal_separator = format.NumberDecimalSeparator;
+ decimal_separator_len = decimal_separator.Length;
+ }
+ if ((style & NumberStyles.AllowThousands) != 0){
+ group_separator = format.NumberGroupSeparator;
+ group_separator_len = group_separator.Length;
+ }
+ string positive = format.PositiveSign;
+ string negative = format.NegativeSign;
+
+ for (; sidx < len; sidx++){
+ c = s [sidx];
+
+ switch (state){
+ case State_AllowSign:
+ if ((style & NumberStyles.AllowLeadingSign) != 0){
+ if (c == positive [0] &&
+ s.Substring (sidx, positive.Length) == positive){
+ state = State_Digits;
+ sidx += positive.Length-1;
+ continue;
+ }
+
+ if (c == negative [0] &&
+ s.Substring (sidx, negative.Length) == negative){
+ state = State_Digits;
+ b [didx++] = (byte) '-';
+ sidx += negative.Length-1;
+ continue;
+ }
+ }
+ state = State_Digits;
+ goto case State_Digits;
+
+ case State_Digits:
+ if (Char.IsDigit (c)){
+ b [didx++] = (byte) c;
+ break;
+ }
+ if (c == 'e' || c == 'E')
+ goto case State_Decimal;
+
+ if (decimal_separator != null &&
+ decimal_separator [0] == c){
+ if (s.Substring (sidx, decimal_separator_len) ==
+ decimal_separator){
+ b [didx++] = (byte) '.';
+ sidx += decimal_separator_len-1;
+ state = State_Decimal;
+ break;
+ }
+ }
+ if (group_separator != null &&
+ group_separator [0] == c){
+ if (s.Substring (sidx, group_separator_len) ==
+ group_separator){
+ sidx += group_separator_len-1;
+ state = State_Digits;
+ break;
+ }
+ }
+
+ if (Char.IsWhiteSpace (c))
+ goto case State_ConsumeWhiteSpace;
+
+ throw new FormatException ("Unknown char: " + c);
+
+ case State_Decimal:
+ if (Char.IsDigit (c)){
+ b [didx++] = (byte) c;
+ break;
+ }
+
+ if (c == 'e' || c == 'E'){
+ if ((style & NumberStyles.AllowExponent) == 0)
+ throw new FormatException ("Unknown char: " + c);
+ b [didx++] = (byte) c;
+ state = State_ExponentSign;
+ break;
+ }
+
+ if (Char.IsWhiteSpace (c))
+ goto case State_ConsumeWhiteSpace;
+ throw new FormatException ("Unknown char: " + c);
+
+ case State_ExponentSign:
+ if (Char.IsDigit (c)){
+ state = State_Exponent;
+ goto case State_Exponent;
+ }
+
+ if (c == positive [0] &&
+ s.Substring (sidx, positive.Length) == positive){
+ state = State_Digits;
+ sidx += positive.Length-1;
+ continue;
+ }
+
+ if (c == negative [0] &&
+ s.Substring (sidx, negative.Length) == negative){
+ state = State_Digits;
+ b [didx++] = (byte) '-';
+ sidx += negative.Length-1;
+ continue;
+ }
+
+ if (Char.IsWhiteSpace (c))
+ goto case State_ConsumeWhiteSpace;
+
+ throw new FormatException ("Unknown char: " + c);
+
+ case State_Exponent:
+ if (Char.IsDigit (c)){
+ b [didx++] = (byte) c;
+ break;
+ }
+
+ if (Char.IsWhiteSpace (c))
+ goto case State_ConsumeWhiteSpace;
+ throw new FormatException ("Unknown char: " + c);
+
+ case State_ConsumeWhiteSpace:
+ if (allow_trailing_white && Char.IsWhiteSpace (c))
+ break;
+ throw new FormatException ("Unknown char");
+ }
+ }
+
+ b [didx] = 0;
+ unsafe {
+ fixed (byte *p = &b [0]){
+ double retVal = ParseImpl (p);
+ if (IsPositiveInfinity(retVal) || IsNegativeInfinity(retVal))
+ throw new OverflowException();
+
+ return retVal;
+ }
+ }
}
+ [MethodImplAttribute(MethodImplOptions.InternalCall)]
+ unsafe private static extern double ParseImpl (byte *byte_ptr);
+
public override string ToString ()
{
return ToString (null, null);
return ToString (format, null);
}
+ [MonoTODO]
public string ToString (string format, IFormatProvider fp)
{
- // TODO: Implement me.
- return "";
+ // FIXME: Need to pass format and provider info to this call too.
+ return ToStringImpl(value);
}
+ [MethodImplAttribute(MethodImplOptions.InternalCall)]
+ private static extern string ToStringImpl (double value);
+
// =========== IConvertible Methods =========== //
public TypeCode GetTypeCode ()
{
return TypeCode.Double;
}
+
+ object IConvertible.ToType (Type conversionType, IFormatProvider provider)
+ {
+ return System.Convert.ToType(value, conversionType, provider);
+ }
+
+ bool IConvertible.ToBoolean (IFormatProvider provider)
+ {
+ return System.Convert.ToBoolean(value);
+ }
+
+ byte IConvertible.ToByte (IFormatProvider provider)
+ {
+ return System.Convert.ToByte(value);
+ }
+
+ char IConvertible.ToChar (IFormatProvider provider)
+ {
+ throw new InvalidCastException();
+ }
+
+ [CLSCompliant(false)]
+ DateTime IConvertible.ToDateTime (IFormatProvider provider)
+ {
+ throw new InvalidCastException();
+ }
+
+ decimal IConvertible.ToDecimal (IFormatProvider provider)
+ {
+ return System.Convert.ToDecimal(value);
+ }
+
+ double IConvertible.ToDouble (IFormatProvider provider)
+ {
+ return System.Convert.ToDouble(value);
+ }
+
+ short IConvertible.ToInt16 (IFormatProvider provider)
+ {
+ return System.Convert.ToInt16(value);
+ }
+
+ int IConvertible.ToInt32 (IFormatProvider provider)
+ {
+ return System.Convert.ToInt32(value);
+ }
+
+ long IConvertible.ToInt64 (IFormatProvider provider)
+ {
+ return System.Convert.ToInt64(value);
+ }
+
+ [CLSCompliant(false)]
+ sbyte IConvertible.ToSByte (IFormatProvider provider)
+ {
+ return System.Convert.ToSByte(value);
+ }
+
+ float IConvertible.ToSingle (IFormatProvider provider)
+ {
+ return System.Convert.ToSingle(value);
+ }
+
+/*
+ string IConvertible.ToString (IFormatProvider provider)
+ {
+ return ToString(provider);
+ }
+*/
+
+ [CLSCompliant(false)]
+ ushort IConvertible.ToUInt16 (IFormatProvider provider)
+ {
+ return System.Convert.ToUInt16(value);
+ }
+
+ [CLSCompliant(false)]
+ uint IConvertible.ToUInt32 (IFormatProvider provider)
+ {
+ return System.Convert.ToUInt32(value);
+ }
+
+ [CLSCompliant(false)]
+ ulong IConvertible.ToUInt64 (IFormatProvider provider)
+ {
+ return System.Convert.ToUInt64(value);
+ }
}
}
projects / mono.git / blobdiff