Low-byte High-byte order

Question

0.00/5 (No votes)

See more:

Ok.. so I made a server-socket based tetris game using the winsock2 Windows Socket API. I finished the program, it works fine, and i actually have no problem in setting up the socket or the WSA. But there's something i don't understand from the winsock2 API. The function MAKEWORD(BYTE bLow,BYTE bHigh).
What does it mean? Can anyone give me a good example of what does this function mean.
I've looked up for the macro, i don't have any problem understanding it. the only problem is i don't understand the concept of MAKEWORD or what is it for.
can anyone help me?
Any help would be really appreciated.

Posted 3-Jan-13 22:37pm

yudhistira dewanata

Updated 3-Jan-13 22:39pm

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

H.Brydon · Accepted Answer · 2013-01-04T06:10:00

A BYTE contains 8 (usable) bits. In this context, a WORD contains 16 bits or 2 BYTEs. These can be represented as

           +--------+--------+
2 BYTEs    |bbbbbbbb|bbbbbbbb|
           +--------+--------+
1 WORD     +wwwwwwww wwwwwwww|
           +--------+--------+

You can build a WORD out of 2 BYTEs. There is an upper BYTE and lower BYTE. The macro you describe does exactly that.

CPallini · Accepted Answer · 2013-01-03T22:43:00

Solution 1

The documentation [^] says it all: "Creates a WORD value by concatenating the specified (byte) values".
It is just an auxiliary macro, useful if you have two bytes and need to 'glue' them in a word. A similar macro (whose usefulness is apparent) is RGB[^].

Posted 3-Jan-13 22:43pm

CPallini

Comments

fjdiewornncalwe 4-Jan-13 16:43pm

+5.