当前位置：首页 > news >正文

C#，字符串匹配（模式搜索）原生（Native）算法的源代码

news 来源：原创 2024/5/20 5:58:40

算法没什么可说的，就是一段一段匹配呗。

运行效果：

源代码：

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

namespace Legalsoft.Truffer.Algorithm
{
   /// <summary>
   /// 字符串匹配（模式搜索）算法集锦
   /// </summary>
   public static partial class PatternSearch
   {
       /// <summary>
       /// 字符串匹配的暴力算法（1）
       /// </summary>
       /// <param name="text"></param>
       /// <param name="pattern"></param>
       /// <returns></returns>
       public static List<int> NativeSearch_Original(string text, string pattern)
       {
           int pt = pattern.Length;
           List<int> matchs = new List<int>();
           for (int i = 0; i < (text.Length - pt); i++)
           {
               if (text.Substring(i, pt) == pattern)
               {
                   matchs.Add(i);
               }
           }
           return matchs;
       }

       /// <summary>
       /// 字符串匹配的暴力算法（2）
       /// </summary>
       /// <param name="text"></param>
       /// <param name="pattern"></param>
       /// <returns></returns>
       public static List<int> Native_Search(string text, string pattern)
       {
           List<int> matchs = new List<int>();

           int M = pattern.Length;
           int N = text.Length;
           int S = N - M;

           if (S <= 0) return matchs;
           for (int i = 0; i <= S; i++)
           {
               int j = 0;
               while (j < M)
               {
                   if (text[i + j] != pattern[j])
                   {
                       break;
                   }
                   j++;
               }

               if (j == M)
               {
                   matchs.Add(i);
               }
           }

           return matchs;
       }
   }
}

--------------================--------------------

POWER BY TRUFFER.CN

using System;
using System.Collections;
using System.Collections.Generic;namespace Legalsoft.Truffer.Algorithm
{/// <summary>/// 字符串匹配（模式搜索）算法集锦/// </summary>public static partial class PatternSearch{/// <summary>/// 字符串匹配的暴力算法（1）/// </summary>/// <param name="text"></param>/// <param name="pattern"></param>/// <returns></returns>public static List<int> NativeSearch_Original(string text, string pattern){int pt = pattern.Length;List<int> matchs = new List<int>();for (int i = 0; i < (text.Length - pt); i++){if (text.Substring(i, pt) == pattern){matchs.Add(i);}}return matchs;}/// <summary>/// 字符串匹配的暴力算法（2）/// </summary>/// <param name="text"></param>/// <param name="pattern"></param>/// <returns></returns>public static List<int> Native_Search(string text, string pattern){List<int> matchs = new List<int>();int M = pattern.Length;int N = text.Length;int S = N - M;if (S <= 0) return matchs;for (int i = 0; i <= S; i++){int j = 0;while (j < M){if (text[i + j] != pattern[j]){break;}j++;}if (j == M){matchs.Add(i);}}return matchs;}}
}