Compare byte array wildscards

Question

0.00/5 (No votes)

See more:

Hey all,

Sorry for the somewhat confusing title, i don't know how to describe it differently.
Here is the problem that's been wrecking havoc on my brains the past days.

I need to compare 2 byte arrays with each other, this is quite simple.
But now i need to add 2 wildcards to one of the byte arrays.

The problem is how do i know i supposed to use the wildcard code instead of direct comparing.
Now if i could do something like (byte)256 is integer wildcard and (byte)257 is an character wildcard, but this is not possible.
The other idea was use null in the array so i know it's a wildcard and i can go from there but this is also not possible.

The only other idea i had is use an arraylist, and add a different datatype but this would require typeof() everytime, and the speed is the main focus of the application so i am trying to avoid this option.

Does anyone have any ideas?
Thanks allot!

Posted 11-May-10 0:24am

Scalee

Add a Solution

2 solutions

Solution 2

Why didn't i think of that.

That the same as an assembly debugger breakpoint.
Just replace the original byte with CC and then restore the original byte.

Or in my case if the byte is 0xFF check it's a wildcard or a normal byte,
Simple yet genius.

Thanks!!

Posted 11-May-10 2:56am

Scalee

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)

#realJSOP · Accepted Answer · 2010-05-11T02:31:00

You could

0) create a pair of dictionaries that hold the position and value of the wildcard positions (one dictionary for each array)

1) Plug a wildcard byte (say, "FF") to those positions

2) Perform the comparison

3) Replace the original values at their original positions from the dictionaries