BitVec.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Query / ResultAssembly / BitVec.cs / 1 / BitVec.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
namespace System.Data.Query.ResultAssembly {
    using System.Diagnostics; 
    using System.Text;

    /// 
    /// BitVector helper class; used to keep track of the used columns 
    /// in the result assembly.
    ///  
    ///  
    /// BitVec can be a struct because it contains a readonly reference to an int[].
    /// This code is a copy of System.Collections.BitArray so that we can have an efficient implementation of Minus. 
    /// 
    internal struct BitVec {
        private readonly int[] m_array;
        private readonly int m_length; 

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] 
        internal BitVec(int length) 
        {
            Debug.Assert(0 < length, "zero length"); 
            m_array = new int[(length + 31) / 32];
            m_length = length;
        }
        internal int Count { 
            get { return m_length; }
        } 
 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal void Set(int index) 
        {
            Debug.Assert(unchecked((uint)index < (uint)m_length), "index out of range");
            m_array[index / 32] |= (1 << (index % 32));
        } 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal void ClearAll() { 
            for (int i = 0; i < m_array.Length; i++) { 
                m_array[i] = 0;
            } 
        }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal bool IsEmpty() {
            for (int i = 0; i < m_array.Length; i++) { 
                if (0 != m_array[i]) {
                    return false; 
                } 
            }
            return true; 
        }
        internal bool IsSet(int index) {
            Debug.Assert(unchecked((uint)index < (uint)m_length), "index out of range");
            return (m_array[index / 32] & (1 << (index % 32))) != 0; 
        }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] 
        internal void Or(BitVec value) { 
            Debug.Assert(m_length ==  value.m_length, "unequal sized bitvec");
            for (int i = 0; i < m_array.Length; i++) { 
                m_array[i] |= value.m_array[i];
            }
        }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] 
        internal void Minus(BitVec value) {
            Debug.Assert(m_length ==  value.m_length, "unequal sized bitvec"); 
            for (int i = 0; i < m_array.Length; i++) { 
                m_array[i] &= ~value.m_array[i];
            } 
        }
        public override string ToString() {
            StringBuilder sb = new StringBuilder(3 * Count);
            string separator = string.Empty; 
            for (int i = 0; i < Count; i++) {
                if (IsSet(i)) { 
                    sb.Append(separator); 
                    sb.Append(i);
                    separator = ","; 
                }
            }
            return sb.ToString();
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
namespace System.Data.Query.ResultAssembly {
    using System.Diagnostics; 
    using System.Text;

    /// 
    /// BitVector helper class; used to keep track of the used columns 
    /// in the result assembly.
    ///  
    ///  
    /// BitVec can be a struct because it contains a readonly reference to an int[].
    /// This code is a copy of System.Collections.BitArray so that we can have an efficient implementation of Minus. 
    /// 
    internal struct BitVec {
        private readonly int[] m_array;
        private readonly int m_length; 

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] 
        internal BitVec(int length) 
        {
            Debug.Assert(0 < length, "zero length"); 
            m_array = new int[(length + 31) / 32];
            m_length = length;
        }
        internal int Count { 
            get { return m_length; }
        } 
 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal void Set(int index) 
        {
            Debug.Assert(unchecked((uint)index < (uint)m_length), "index out of range");
            m_array[index / 32] |= (1 << (index % 32));
        } 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal void ClearAll() { 
            for (int i = 0; i < m_array.Length; i++) { 
                m_array[i] = 0;
            } 
        }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
        internal bool IsEmpty() {
            for (int i = 0; i < m_array.Length; i++) { 
                if (0 != m_array[i]) {
                    return false; 
                } 
            }
            return true; 
        }
        internal bool IsSet(int index) {
            Debug.Assert(unchecked((uint)index < (uint)m_length), "index out of range");
            return (m_array[index / 32] & (1 << (index % 32))) != 0; 
        }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] 
        internal void Or(BitVec value) { 
            Debug.Assert(m_length ==  value.m_length, "unequal sized bitvec");
            for (int i = 0; i < m_array.Length; i++) { 
                m_array[i] |= value.m_array[i];
            }
        }
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] 
        internal void Minus(BitVec value) {
            Debug.Assert(m_length ==  value.m_length, "unequal sized bitvec"); 
            for (int i = 0; i < m_array.Length; i++) { 
                m_array[i] &= ~value.m_array[i];
            } 
        }
        public override string ToString() {
            StringBuilder sb = new StringBuilder(3 * Count);
            string separator = string.Empty; 
            for (int i = 0; i < Count; i++) {
                if (IsSet(i)) { 
                    sb.Append(separator); 
                    sb.Append(i);
                    separator = ","; 
                }
            }
            return sb.ToString();
        } 
    }
} 

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

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