C int和BYTE互转、字符串转十六进制字节数组

 

//int 转 4字节 BYTE[],
void intToByte(int i,BYTE abyte[]) 
{

abyte[3] = (byte)(0xff & i);

abyte[2] = (byte)((0xff00 & i) >> 8);

abyte[1] = (byte)((0xff0000 & i) >> 16);

abyte[0] = (byte)((0xff000000 & i) >> 24);

}

//4字节 BYTE[] 转 int 
int bytesToInt(BYTE bytes[]) 
{

int addr = bytes[3] & 0xFF;

addr |= ((bytes[2] << 8) & 0xFF00);

addr |= ((bytes[1] << 16) & 0xFF0000);

addr |= ((bytes[0] << 24) & 0xFF000000);

        //long int result = (x[0] << 24) + (x[1] << 16) + (x[2] << 8) + x[3];   

return addr;

}

//字符串 转 十六进制字节数组，返回数组长度

int StrToByte(CString str, CByteArray &data)
{
BYTE byte[100];

int nlen = 0;

int str_length = str.GetLength();

CString strTemp;

// 字符串转换为 BYTE 类型
// sscanf(strTemp, "%02x", &int_temp);

for (int i = 0; i < str_length; )
{
strTemp = str.Mid(i, 2);

int int_temp = 0;

sscanf(strTemp, "%02x", &int_temp);

byte[nlen] = (BYTE)int_temp;

//
data.Add(byte[nlen]);

i += 3;

nlen++;

strTemp.ReleaseBuffer();                

}

data.SetSize(nlen);

return nlen;

}

//累加和取反校验

UINT Check_Sum(UCHAR *data,UINT length)

{

    UINT i;

    UCHAR sum = 0;

    for(i=1; i<length; i++)

    {

        sum += data[i];

    }

    data[length] = (~sum);

    return data[length];

}