Files
TouchSocket/RRQMCore/Helper/BytesHelper.cs
2022-02-18 20:27:00 +08:00

106 lines
3.4 KiB
C#
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

//------------------------------------------------------------------------------
// 此代码版权除特别声明或在RRQMCore.XREF命名空间的代码归作者本人若汝棋茗所有
// 源代码使用协议遵循本仓库的开源协议及附加协议若本仓库没有设置则按MIT开源协议授权
// CSDN博客https://blog.csdn.net/qq_40374647
// 哔哩哔哩视频https://space.bilibili.com/94253567
// Gitee源代码仓库https://gitee.com/RRQM_Home
// Github源代码仓库https://github.com/RRQM
// API首页https://www.yuque.com/eo2w71/rrqm
// 交流QQ群234762506
// 感谢您的下载和使用
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
namespace RRQMCore.Helper
{
/// <summary>
/// 字节数组扩展类
/// </summary>
public static class BytesHelper
{
/// <summary>
/// 索引包含数组
/// </summary>
/// <param name="srcByteArray"></param>
/// <param name="offset"></param>
/// <param name="length"></param>
/// <param name="subByteArray"></param>
/// <returns></returns>
public static List<int> IndexOfInclude(this byte[] srcByteArray, int offset, int length, byte[] subByteArray)
{
int subByteArrayLen = subByteArray.Length;
List<int> indexes = new List<int>();
if (length < subByteArrayLen)
{
return indexes;
}
int hitLength = 0;
for (int i = offset; i < length; i++)
{
if (srcByteArray[i] == subByteArray[hitLength])
{
hitLength++;
}
else
{
hitLength = 0;
}
if (hitLength == subByteArray.Length)
{
hitLength = 0;
indexes.Add(i);
}
}
return indexes;
}
/// <summary>
/// 索引第一个包含数组的索引位置,例如:在{0,1,2,3,1,2,3}中索引{2,3}则返回3。
/// </summary>
/// <param name="srcByteArray"></param>
/// <param name="offset"></param>
/// <param name="length"></param>
/// <param name="subByteArray"></param>
/// <returns></returns>
public static int IndexOfFirst(this byte[] srcByteArray, int offset, int length, byte[] subByteArray)
{
if (length < subByteArray.Length)
{
return -1;
}
int hitLength = 0;
for (int i = offset; i < length + offset; i++)
{
if (srcByteArray[i] == subByteArray[hitLength])
{
hitLength++;
}
else
{
hitLength = 0;
}
if (hitLength == subByteArray.Length)
{
return i;
}
}
return -1;
}
/// <summary>
/// 转Base64。
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static string ToBase64(this byte[] data)
{
return Convert.ToBase64String(data);
}
}
}