C#，字符串匹配（模式搜索）原生（Native）算法的源代码

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;

}

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POWER BY TRUFFER.CN

cs 复制代码

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;
        }
    }
}