SimpleBitVector32.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Configuration / System / Configuration / SimpleBitVector32.cs / 1305376 / SimpleBitVector32.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Configuration { 
    using System; 

    // 
    // This is a cut down copy of System.Collections.Specialized.BitVector32. The
    // reason this is here is because it is used rather intensively by Control and
    // WebControl. As a result, being able to inline this operations results in a
    // measurable performance gain, at the expense of some maintainability. 
    //
    [Serializable] 
    internal struct SimpleBitVector32 { 
        private int data;
 
        internal SimpleBitVector32(int data) {
            this.data = data;
        }
 
        internal int Data {
            get { return data; } 
#if UNUSED_CODE 
            set { data = value; }
#endif 
        }

        internal bool this[int bit] {
            get { 
                return (data & bit) == bit;
            } 
            set { 
                int _data = data;
                if(value) { 
                    data = _data | bit;
                }
                else {
                    data = _data & ~bit; 
                }
            } 
        } 

#if UNUSED_CODE 
        internal void Set(int bit) {
            data |= bit;
        }
 
        internal void Clear(int bit) {
            data &= ~bit; 
        } 

        internal void Toggle(int bit) { 
            data ^= bit;
        }

        /* 
         * COPY_FLAG copies the value of flags from a source field
         * into a destination field. 
         * 
         * In the macro:
         * + "&flag" limits the outer xor operation to just the flag we're interested in. 
         * + These are the results of the two xor operations:
         *
         * fieldDst    fieldSrc    inner xor   outer xor
         * 0           0           0           0 
         * 0           1           1           1
         * 1           0           1           0 
         * 1           1           0           1 
         */
        internal void Copy(SimpleBitVector32 src, int bit) { 
            data ^= (data ^ src.data) & bit;
        }
#endif
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK