5 // Miguel de Icaza (miguel@ximian.com)
7 // (C) Ximian, Inc. http://www.ximian.com
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
13 // Permission is hereby granted, free of charge, to any person obtaining
14 // a copy of this software and associated documentation files (the
15 // "Software"), to deal in the Software without restriction, including
16 // without limitation the rights to use, copy, modify, merge, publish,
17 // distribute, sublicense, and/or sell copies of the Software, and to
18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 using System.Globalization;
38 public struct Single : IComparable, IFormattable, IConvertible
40 public const float Epsilon = 1.4e-45f;
41 public const float MaxValue = 3.40282346638528859e38f;
42 public const float MinValue = -3.40282346638528859e38f;
43 public const float NaN = 0.0f / 0.0f;
44 public const float PositiveInfinity = 1.0f / 0.0f;
45 public const float NegativeInfinity = -1.0f / 0.0f;
47 internal float m_value;
49 public int CompareTo (object v)
54 if (!(v is System.Single))
55 throw new ArgumentException (Locale.GetText ("Value is not a System.Single."));
59 if (IsPositiveInfinity (m_value) && IsPositiveInfinity (fv))
62 if (IsNegativeInfinity (m_value) && IsNegativeInfinity (fv))
77 if (this.m_value == fv)
79 else if (this.m_value > fv)
85 public override bool Equals (object o)
87 if (!(o is System.Single))
90 if (IsNaN ((float) o)) {
91 return IsNaN (m_value);
94 return ((float) o) == m_value;
97 public unsafe override int GetHashCode ()
103 public static bool IsInfinity (float f)
105 return (f == PositiveInfinity || f == NegativeInfinity);
108 public static bool IsNaN (float f)
113 public static bool IsNegativeInfinity (float f)
115 return (f < 0.0f && (f == NegativeInfinity || f == PositiveInfinity));
118 public static bool IsPositiveInfinity (float f)
120 return (f > 0.0f && (f == NegativeInfinity || f == PositiveInfinity));
123 public static float Parse (string s)
125 double parsed_value = Double.Parse (
126 s, (NumberStyles.Float | NumberStyles.AllowThousands), null);
127 if (parsed_value > (double) float.MaxValue)
128 throw new OverflowException();
130 return (float) parsed_value;
133 public static float Parse (string s, IFormatProvider provider)
135 double parsed_value = Double.Parse (
136 s, (NumberStyles.Float | NumberStyles.AllowThousands), provider);
137 if (parsed_value > (double) float.MaxValue)
138 throw new OverflowException();
140 return (float) parsed_value;
143 public static float Parse (string s, NumberStyles style)
145 double parsed_value = Double.Parse (s, style, null);
146 if (parsed_value > (double) float.MaxValue)
147 throw new OverflowException();
149 return (float) parsed_value;
152 public static float Parse (string s, NumberStyles style, IFormatProvider provider)
154 double parsed_value = Double.Parse (s, style, provider);
155 if (parsed_value > (double) float.MaxValue)
156 throw new OverflowException();
158 return (float) parsed_value;
161 public override string ToString ()
163 return ToString (null, null);
166 public string ToString (IFormatProvider provider)
168 return ToString (null, provider);
171 public string ToString (string format)
173 return ToString (format, null);
176 public string ToString (string format, IFormatProvider provider)
178 if (provider is CultureInfo)
179 return SingleFormatter.NumberToString (format, ((CultureInfo) provider).NumberFormat, m_value);
181 return SingleFormatter.NumberToString (format, (NumberFormatInfo) provider, m_value);
184 // ============= IConvertible Methods ============ //
185 public TypeCode GetTypeCode ()
187 return TypeCode.Single;
190 bool IConvertible.ToBoolean (IFormatProvider provider)
192 return System.Convert.ToBoolean (m_value);
195 byte IConvertible.ToByte (IFormatProvider provider)
197 return System.Convert.ToByte (m_value);
200 char IConvertible.ToChar (IFormatProvider provider)
202 return System.Convert.ToChar (m_value);
205 DateTime IConvertible.ToDateTime (IFormatProvider provider)
207 return System.Convert.ToDateTime (m_value);
210 decimal IConvertible.ToDecimal (IFormatProvider provider)
212 return System.Convert.ToDecimal (m_value);
215 double IConvertible.ToDouble (IFormatProvider provider)
217 return System.Convert.ToDouble (m_value);
220 short IConvertible.ToInt16 (IFormatProvider provider)
222 return System.Convert.ToInt16 (m_value);
225 int IConvertible.ToInt32 (IFormatProvider provider)
227 return System.Convert.ToInt32 (m_value);
230 long IConvertible.ToInt64 (IFormatProvider provider)
232 return System.Convert.ToInt64 (m_value);
235 sbyte IConvertible.ToSByte (IFormatProvider provider)
237 return System.Convert.ToSByte (m_value);
240 float IConvertible.ToSingle (IFormatProvider provider)
242 return System.Convert.ToSingle (m_value);
245 object IConvertible.ToType (Type conversionType, IFormatProvider provider)
247 return System.Convert.ToType (m_value, conversionType, provider);
250 ushort IConvertible.ToUInt16 (IFormatProvider provider)
252 return System.Convert.ToUInt16 (m_value);
255 uint IConvertible.ToUInt32 (IFormatProvider provider)
257 return System.Convert.ToUInt32 (m_value);
260 ulong IConvertible.ToUInt64 (IFormatProvider provider)
262 return System.Convert.ToUInt64 (m_value);