C#，数值计算——Hashfn1的计算方法与源程序

1 文本格式

using System;
using System.Collections;
using System.Collections.Generic;

namespace Legalsoft.Truffer
{
    public class Hashfn1
    {
        private Ranhash hasher { get; set; } = new Ranhash();
        private int n { get; set; }

        public Hashfn1(int nn)
        {
            this.n = nn;
        }

        public ulong fn(object key)
        {
            uint k;
            ulong kk;
            switch (n)
            {
                case 4:
                    k = (uint)key;
                    return hasher.int64(k);
                case 8:
                    kk = (ulong)key;
                    return hasher.int64(kk);
                default:
                    throw new Exception("Hashfn1 is for 4 or 8 byte keys only.");
            }
        }
    }
}
 

2 代码格式

using System;
using System.Collections;
using System.Collections.Generic;

namespace Legalsoft.Truffer
{
    public class Hashfn1
    {
        private Ranhash hasher { get; set; } = new Ranhash();
        private int n { get; set; }

        public Hashfn1(int nn)
        {
            this.n = nn;
        }

        public ulong fn(object key)
        {
            uint k;
            ulong kk;
            switch (n)
            {
                case 4:
                    k = (uint)key;
                    return hasher.int64(k);
                case 8:
                    kk = (ulong)key;
                    return hasher.int64(kk);
                default:
                    throw new Exception("Hashfn1 is for 4 or 8 byte keys only.");
            }
        }
    }
}