学用ASP.NetのSystemCollections.Specialized.BitVector 32構造

BitVector 32の構成は32ビットサイズの格納スペース(Intel 32と同様)のみを提供する、これによりブール値や小整数(例えば7以内や15以内の小整数など)に素早くアクセスできる.
主要メンバー:

/*    */
Data; //  32        ,   ;           BitVector32    

/*      */
BitVector32.CreateMask();    //   Mask
BitVector32.CreateSection(); //   BitVector32.Section
BitVector32.ToString();      //     BitVector32          

/*    */
ToString(); //        

/*         BitVector32.Section        */
Mask;   //   
Offset; //  

構築方法:

protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv1 = new BitVector32();           //  new BitVector32(0);

    BitVector32 bv2 = new BitVector32(0);          //  32      0
    BitVector32 bv3 = new BitVector32(0x0000FF0F); //     int    " "

    BitVector32 bv4 = new BitVector32(bv3);        //      BitVector32      

    BitVector32 bv5 = new BitVector32(-1);         //      

    string s1 = bv1.ToString(); //BitVector32{00000000000000000000000000000000}
    string s2 = bv2.ToString(); //BitVector32{00000000000000000000000000000000}
    string s3 = bv3.ToString(); //BitVector32{00000000000000001111111100001111}
    string s4 = bv4.ToString(); //BitVector32{00000000000000001111111100001111}
    string s5 = bv5.ToString(); //BitVector32{11111111111111111111111111111111}

    TextBox1.Text = s1 + "
" + s2 + "
" + s3 + "
" + s4 + "
" + s5;
}

配列型アクセス:

//    BitVector32         ,      UInt32.MaxValue  .
protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv = new BitVector32(0);

    bv[1] = true;
    string s1 = bv.ToString();    //BitVector32{00000000000000000000000000000001}

    bv[-1] = false; bv[2] = true; //         
    string s2 = bv.ToString();    //BitVector32{00000000000000000000000000000010}

    bv[-1] = false; bv[3] = true; //BitVector32{00000000000000000000000000000011}
    string s3 = bv.ToString();

    bv[-1] = false; bv[4] = true; //BitVector32{00000000000000000000000000000100}
    string s4 = bv.ToString();

    bv[-1] = false; bv[5] = true; //BitVector32{00000000000000000000000000000101}
    string s5 = bv.ToString();

    bv[-1] = false; bv[6] = true; //BitVector32{00000000000000000000000000000110}
    string s6 = bv.ToString();

    bv[-1] = false; bv[7] = true; //BitVector32{00000000000000000000000000000111}
    string s7 = bv.ToString();

    bv[-1] = false; bv[Int32.MaxValue] = true; //BitVector32{01111111111111111111111111111111}
    string s8 = bv.ToString();

    TextBox1.Text = s1 + "
" + s2 + "
" + s3 + "
" + s4 + "
" + s5 + "
" + s6 + "
" + s7 + "
" + s8;
}

各ビットに個別にアクセスするには、次の手順に従います.

//       (Mask)  
protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv = new BitVector32(0);

    int n1 = (int)Math.Pow(2, 0);
    int n2 = (int)Math.Pow(2, 1);
    int n3 = (int)Math.Pow(2, 2);
    int n4 = (int)Math.Pow(2, 3);
    int n5 = (int)Math.Pow(2, 4);
    int n32 = (int)Math.Pow(2, 31);

    bv[n3] = true;
    string s1 = bv.ToString(); //BitVector32{00000000000000000000000000000100}

    bv[n1] = true;
    bv[n2] = true;
    bv[n3] = true;
    bv[n4] = true;
    bv[n5] = true;
    bv[n32] = true;
    string s2 = bv.ToString(); //BitVector32{10000000000000000000000000011111}

    bv[-1] = true; //   
    bv[n1] = false;
    bv[n2] = false;
    bv[n3] = false;
    bv[n4] = false;
    bv[n5] = false;
    bv[n32] = false;
    string s3 = bv.ToString(); //BitVector32{01111111111111111111111111100000}

    TextBox1.Text = s1 + "
" + s2 + "
" + s3;
}

BitVector32.CreateMask():

//           BitVector32     
protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv = new BitVector32(0);

    int mk1 = BitVector32.CreateMask();    //      Mask,     BitVector32.CreateMask(0);
    int mk2 = BitVector32.CreateMask(mk1); //  mk1     mk2
    int mk3 = BitVector32.CreateMask(mk2); //  mk2     mk3
    int mk4 = BitVector32.CreateMask(mk3); //
    int mk5 = BitVector32.CreateMask(mk4); //

    //mk1 .. mk5       : 1、2、4、8、16

    bv[mk3] = true;
    string s1 = bv.ToString(); //BitVector32{00000000000000000000000000000100}

    bv[mk1] = true;
    bv[mk2] = true;
    bv[mk3] = true;
    bv[mk4] = true;
    bv[mk5] = true;
    string s2 = bv.ToString(); //BitVector32{00000000000000000000000000011111}

    bv[-1] = true; //   
    bv[mk1 | mk2 | mk3 | mk4 | mk5] = false; //     "|"   "+"       Mask   
    string s3 = bv.ToString(); //BitVector32{11111111111111111111111111100000}

    TextBox1.Text = s1 + "
" + s2 + "
" + s3;
}

BitVector32.CreateSection():

//      0..7     ,         3       ;
//BitVector32.CreateSection(n)     BitVector32        0..n       Section(  )
protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv = new BitVector32(0);

    BitVector32.Section sec = BitVector32.CreateSection(7);

    string s0, s1, s2, s3, s4, s5, s6, s7;
    bv[sec] = 0; s0 = bv.ToString(); //BitVector32{00000000000000000000000000000000}
    bv[sec] = 1; s1 = bv.ToString(); //BitVector32{00000000000000000000000000000001}
    bv[sec] = 2; s2 = bv.ToString(); //BitVector32{00000000000000000000000000000010}
    bv[sec] = 3; s3 = bv.ToString(); //BitVector32{00000000000000000000000000000011}
    bv[sec] = 4; s4 = bv.ToString(); //BitVector32{00000000000000000000000000000100}
    bv[sec] = 5; s5 = bv.ToString(); //BitVector32{00000000000000000000000000000101}
    bv[sec] = 6; s6 = bv.ToString(); //BitVector32{00000000000000000000000000000110}
    bv[sec] = 7; s7 = bv.ToString(); //BitVector32{00000000000000000000000000000111}

    TextBox1.Text = s0 + "
" + s1 + "
" + s2 + "
" + s3 + "
" + s4 + "
" + s5 + "
" + s6 + "
" + s7;
}

複数のセッションを作成するには、次の手順に従います.

//     Section  ,   BitVector32.CreateMask()      ,          ,    .
protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv = new BitVector32(0);

    BitVector32.Section secX = BitVector32.CreateSection(15);       //    Section,     0..15
    BitVector32.Section secY = BitVector32.CreateSection(7, secX);  //secX     Section,     0..7
    BitVector32.Section secZ = BitVector32.CreateSection(15, secY); //secY     Section,     0..15

    //        : 000000000000000000000ZZZZYYYXXXX

    bv[secX] = 15;
    bv[secY] = 0;
    bv[secZ] = 15;
    string s1 = bv.ToString(); //BitVector32{00000000000000000000011110001111}

    bv[secX] = 1;
    bv[secY] = 1;
    bv[secZ] = 1;
    string s2 = bv.ToString(); //BitVector32{00000000000000000000000010010001}

    TextBox1.Text = s1 + "
" + s2;
}

BitVector32.CreateSection()が返すBitVector 32.Sectionも構造体です.

protected void Button1_Click(object sender, EventArgs e)
{
    BitVector32 bv = new BitVector32(0);

    BitVector32.Section secX = BitVector32.CreateSection(15);      
    BitVector32.Section secY = BitVector32.CreateSection(7, secX); 
    BitVector32.Section secZ = BitVector32.CreateSection(15, secY);

    TextBox1.Text  = string.Format("{0}, {1}, {2}
", secX.Mask, secY.Mask, secZ.Mask);       //15, 7, 15
    TextBox1.Text += string.Format("{0}, {1}, {2}
", secX.Offset, secY.Offset, secZ.Offset); //0, 4, 7
}