代码实现:在字节数组中查找16进制字节序列(C#)

近日在工作中需要在字节数组中查找某个16进制字节序列,没找到现成的,只好自己写了一个,不管效率如何,只要自己用着

顺手就好 :)

代码如下:

//在buffer中查找16进制字节序列key，找到返回1，未找到返回0

public int SearchByte(byte[] buffer, byte[] key, int startPos, ref int pos)

{

int i = startPos;

int tem_pos = 0;

bool found1 = false;

int found2 = 0;

do

{

for (int j = 0; j < key.Length; j++)

{

if (buffer[i] == key[j])

{

if (j == 0)

{

found1 = true;

tem_pos = i;

}

else

found2 = 1;

i = i + 1;

}

else

{

if (j == 0)

found1 = false;

else

found2 = 2;

}

if (found1 == false)

{

i = i + 1;

break;

}

if ((found2 == 2))

{

i = i - j + 1;

found1 = false;

found2 = 0;

break;

}

if ((found1 == true) && (found2 == 1) && (j == (key.Length - 1))) //匹配上了

{

pos = i - (key.Length);

return 1;

}

}

}

while (i < buffer.Length);

return 0;

}

用法:

int startPos =0;

int endPos = 0;

byte[] bHead = new byte[3];

bHead[0] = 0xA0;

bHead[1] = 0xA6;

bHead[2] = 0xB8;

if ( 1 == SearchByte(readBuffer, bHead, startPos, ref endPos))

{

//the endPos value 就是bHead在readBuffer中的位置

}