Int32.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Int32.cs / 1 / Int32.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  Int32 
**
** 
** Purpose: A representation of a 32 bit 2's complement
**          integer.
**
** 
===========================================================*/
namespace System { 
 
    using System;
    using System.Globalization; 
    using System.Runtime.InteropServices;

    [Serializable, System.Runtime.InteropServices.StructLayout(LayoutKind.Sequential)]
[System.Runtime.InteropServices.ComVisible(true)] 
    public struct Int32 : IComparable, IFormattable, IConvertible
#if GENERICS_WORK 
        , IComparable, IEquatable 
#endif
    { 
        internal int m_value;

        public const int MaxValue = 0x7fffffff;
        public const int MinValue = unchecked((int)0x80000000); 

        // Compares this object to another object, returning an integer that 
        // indicates the relationship. 
        // Returns a value less than zero if this  object
        // null is considered to be less than any instance. 
        // If object is not of type Int32, this method throws an ArgumentException.
        //
        public int CompareTo(Object value) {
            if (value == null) { 
                return 1;
            } 
            if (value is Int32) { 
                // Need to use compare because subtraction will wrap
                // to positive for very large neg numbers, etc. 
                int i = (int)value;
                if (m_value < i) return -1;
                if (m_value > i) return 1;
                return 0; 
            }
            throw new ArgumentException (Environment.GetResourceString("Arg_MustBeInt32")); 
        } 

        public int CompareTo(int value) { 
            // Need to use compare because subtraction will wrap
            // to positive for very large neg numbers, etc.
            if (m_value < value) return -1;
            if (m_value > value) return 1; 
            return 0;
        } 
 
        public override bool Equals(Object obj) {
            if (!(obj is Int32)) { 
                return false;
            }
            return m_value == ((Int32)obj).m_value;
        } 

        public bool Equals(Int32 obj) 
        { 
            return m_value == obj;
        } 

        // The absolute value of the int contained.
        public override int GetHashCode() {
            return m_value; 
        }
 
        public override String ToString() { 
            return Number.FormatInt32(m_value, null, NumberFormatInfo.CurrentInfo);
        } 

        public String ToString(String format) {
            return Number.FormatInt32(m_value, format, NumberFormatInfo.CurrentInfo);
        } 

        public String ToString(IFormatProvider provider) { 
            return Number.FormatInt32(m_value, null, NumberFormatInfo.GetInstance(provider)); 
        }
 
        public String ToString(String format, IFormatProvider provider) {
            return Number.FormatInt32(m_value, format, NumberFormatInfo.GetInstance(provider));
        }
 
        public static int Parse(String s) {
            return Number.ParseInt32(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo); 
        } 

        public static int Parse(String s, NumberStyles style) { 
            NumberFormatInfo.ValidateParseStyleInteger(style);
            return Number.ParseInt32(s, style, NumberFormatInfo.CurrentInfo);
        }
 
    	// Parses an integer from a String in the given style.  If
    	// a NumberFormatInfo isn't specified, the current culture's 
    	// NumberFormatInfo is assumed. 
    	//
    	public static int Parse(String s, IFormatProvider provider) { 
            return Number.ParseInt32(s, NumberStyles.Integer, NumberFormatInfo.GetInstance(provider));
        }

    	// Parses an integer from a String in the given style.  If 
    	// a NumberFormatInfo isn't specified, the current culture's
    	// NumberFormatInfo is assumed. 
    	// 
    	public static int Parse(String s, NumberStyles style, IFormatProvider provider) {
            NumberFormatInfo.ValidateParseStyleInteger(style); 
            return Number.ParseInt32(s, style, NumberFormatInfo.GetInstance(provider));
        }

        // Parses an integer from a String. Returns false rather 
        // than throwing exceptin if input is invalid
        // 
        public static bool TryParse(String s, out Int32 result) { 
            return Number.TryParseInt32(s, NumberStyles.Integer, NumberFormatInfo.CurrentInfo, out result);
        } 

        // Parses an integer from a String in the given style. Returns false rather
        // than throwing exceptin if input is invalid
        // 
        public static bool TryParse(String s, NumberStyles style, IFormatProvider provider, out Int32 result) {
            NumberFormatInfo.ValidateParseStyleInteger(style); 
            return Number.TryParseInt32(s, style, NumberFormatInfo.GetInstance(provider), out result); 
        }
 
        //
        // IValue implementation
        //
 
        public TypeCode GetTypeCode() {
            return TypeCode.Int32; 
        } 

        ///  
        bool IConvertible.ToBoolean(IFormatProvider provider) {
            return Convert.ToBoolean(m_value);
        }
 
        /// 
        char IConvertible.ToChar(IFormatProvider provider) { 
            return Convert.ToChar(m_value); 
        }
 
        /// 
        sbyte IConvertible.ToSByte(IFormatProvider provider) {
            return Convert.ToSByte(m_value);
        } 

        ///  
        byte IConvertible.ToByte(IFormatProvider provider) { 
            return Convert.ToByte(m_value);
        } 

        /// 
        short IConvertible.ToInt16(IFormatProvider provider) {
            return Convert.ToInt16(m_value); 
        }
 
        ///  
        ushort IConvertible.ToUInt16(IFormatProvider provider) {
            return Convert.ToUInt16(m_value); 
        }

        /// 
        int IConvertible.ToInt32(IFormatProvider provider) { 
            return m_value;
        } 
 
        /// 
        uint IConvertible.ToUInt32(IFormatProvider provider) { 
            return Convert.ToUInt32(m_value);
        }

        ///  
        long IConvertible.ToInt64(IFormatProvider provider) {
            return Convert.ToInt64(m_value); 
        } 

        ///  
        ulong IConvertible.ToUInt64(IFormatProvider provider) {
            return Convert.ToUInt64(m_value);
        }
 
        /// 
        float IConvertible.ToSingle(IFormatProvider provider) { 
            return Convert.ToSingle(m_value); 
        }
 
        /// 
        double IConvertible.ToDouble(IFormatProvider provider) {
            return Convert.ToDouble(m_value);
        } 

        ///  
        Decimal IConvertible.ToDecimal(IFormatProvider provider) { 
            return Convert.ToDecimal(m_value);
        } 

        /// 
        DateTime IConvertible.ToDateTime(IFormatProvider provider) {
            throw new InvalidCastException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidCast_FromTo"), "Int32", "DateTime")); 
        }
 
        ///  
        Object IConvertible.ToType(Type type, IFormatProvider provider) {
            return Convert.DefaultToType((IConvertible)this, type, provider); 
        }
    }
}

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