Thread: 2 bytes to short

If you two byte data has the format of a short int do this:[edited: casting]

Code:

short* sdata = static_cast<short*>(data);

If it hasn't why converting?

Am I right? This string (data) has both ping and rate (and more data?) after each other.

So you need the offset of rate and ping in the string. Suppose ping is byte 3 to 5 and rate is 5to 7. (zero based indexing)

Code:

short* ping_ptr  = static_cast<short*> (data + 3);
short* rate_ptr =  static_cast<short*> (data + 5);

Now our new pointers point to ping and rate in data string.

Yes, you will.

But I think there is better way. You should make a struct with the feelds :
ping
rate
etc

And then fill them with data.

No you can't do it with data because it is a pointer to a string. Bitwise operators work on variables not strings. In strings we don't need them because each byte is addressable directly.

Originally Posted by siavoshkc

No you can't do it with data because it is a pointer to a string. Bitwise operators work on variables not strings. In strings we don't need them because each byte is addressable directly.

It is pointer to character array (not each char array is a string)
and of course each member of the array is a char - so we CAN apply bitwise operations to the members of the array.

It is pointer to character array (not each char array is a string)
and of course each member of the array is a char - so we CAN apply bitwise operations to the members of the array.

Of course you can. But it doesn't give you anything useful in this case. I said we can not do it on strings. But you can do it on each character.

ut it doesn't give you anything useful in this case.

It depends on what is stored there... If some short value is stored as 2 bytes char array for sending throgh the network - of course the bitwise operation will give you something useful - the original value.