C#, numerical calculation - calculation method and source program of Ranq1

1 text format

using System;

namespace Legalsoft.Truffer
{
    /// <summary>
    /// Recommended generator for everyday use.The period is 1.8E19. Calling
    /// conventions same as Ran, above.
    /// </summary>
    public class Ranq1
    {
        private ulong v { get; set; }

        public Ranq1(ulong j)
        {
            this.v = 4101842887655102017L;
            v ^= j;
            v = (ulong)int64();
        }

        public ulong int64()
        {             v ^= v >> 21;             v ^= v << 35;             v ^= v >> 4;             return (ulong)(v * 2685821657736338717L);         }

        /// <summary>
        /// Return random double-precision floating value in the range 0. to 1.
        /// </summary>
        /// <returns></returns>
        public double doub()
        {
            double r= 5.42101086242752217E-20 * int64();
            return (r < 0.0) ? (1 + r) : r;
        }

        public uint int32()
        {
            return (uint)int64();
        }
    }
}
 

2 code format

using System;

namespace Legalsoft.Truffer
{
    /// <summary>
    /// Recommended generator for everyday use.The period is 1.8E19. Calling
    /// conventions same as Ran, above.
    /// </summary>
    public class Ranq1
    {
        private ulong v { get; set; }

        public Ranq1(ulong j)
        {
            this.v = 4101842887655102017L;
            v ^= j;
            v = (ulong)int64();
        }

        public ulong int64()
        {
            v ^= v >> 21;
            v ^= v << 35;
            v ^= v >> 4;
            return (ulong)(v * 2685821657736338717L);
        }

        /// <summary>
        /// Return random double-precision floating value in the range 0. to 1.
        /// </summary>
        /// <returns></returns>
        public double doub()
        {
            double r= 5.42101086242752217E-20 * int64();
            return (r < 0.0) ? (1 + r) : r;
        }

        public uint int32()
        {
            return (uint)int64();
        }
    }
}