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];

}