Solved

Hexadecimal String to uint64_t

Posted on 2011-03-11
3
1,938 Views
Last Modified: 2012-05-11
Hey guys,

How can I convert this?

std::string macAddress = "0x0493934FF3";

into a uint64_t?  I know atoi can pack a hex string into a 32-bit integer but I have no idea how to get it into a 64-bit integer which is how our system stores MAC addresses.  I need this ability to read the XML strings from our configuration into the system.

Thanks!

-w00te
0
Comment
Question by:w00te
  • 2
3 Comments
 
LVL 31

Accepted Solution

by:
Zoppo earned 400 total points
ID: 35109743
Hi w00te,

you could use a stringstream, i.e. like this:
	__int64 n;
	std::stringstream ss;
	ss.str( macAddress );
	ss >> std::hex >> n;
	// check it
	std::cout << std::hex << n << std::endl;

Open in new window


Hope that helps,

ZOPPO
0
 
LVL 31

Expert Comment

by:Zoppo
ID: 35109750
ah - sorry, forgot to say you need to

#include <sstream>

Open in new window

0
 
LVL 86

Assisted Solution

by:jkr
jkr earned 100 total points
ID: 35109872
Just for the sake of completeness - there's also '_strtoui64()': http://msdn.microsoft.com/en-us/library/85zk715d%28VS.80%29.aspx (scroll down for the example)
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Many modern programming languages support the concept of a property -- a class member that combines characteristics of both a data member and a method.  These are sometimes called "smart fields" because you can add logic that is applied automaticall…
This article shows you how to optimize memory allocations in C++ using placement new. Applicable especially to usecases dealing with creation of large number of objects. A brief on problem: Lets take example problem for simplicity: - I have a G…
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now