Solved

using C macros to print line number and function name

Posted on 2013-12-24
1
337 Views
Last Modified: 2014-02-04
Hi there,
I am using log4c library and have been using the following macro for my logging purposes.

#define mylog(A,B, ...) log4c_category_log(A, B, __VA_ARGS__)

It works fine, but I want to also use __LINE__, __FUNC__ directives so I can have the line number and function name printed.

For example, if I am using the mylog( ) in my_function() in line 25.

void my_function()
{
    mylog(MYCATEGORY, LOG4C_PRIORITY_ERROR, "some message");
}

I want the log to be printed like :
>>>>>>some message, my_function, 25
I don't want to edit the logging but rather using the macro definition be able to print these details.  Is it possible?

I tried the following, but it does not work when the log is something like:
 mylog(MYCATEGORY, LOG4C_PRIORITY_ERROR, "some message %s  %s", "value1", "value2");

#define mylog(A,B, ...) log4c_category_log(A, B,"%s %s %d ", __VA_ARGS__, __FUNCTION__, __LINE__)
0
Comment
Question by:ambuli
1 Comment
 
LVL 84

Accepted Solution

by:
ozo earned 500 total points
ID: 39738341
#define mylog(A,B, ...) log4c_category_log(A, B, __VA_ARGS__,__LINE__)
#define log4c_category_log(A,B,C,...) printf(">>>>>>" C ", " __FILE__ ", %d\n", __VA_ARGS__)
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

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

Suggested Solutions

Over the last ten+ years I have seen Linux configuration tools come and go. In the early days there was the tried-and-true, all-powerful linuxconf that many thought would remain the one and only Linux configuration tool until the end of times. Well,…
Using 'screen' for session sharing, The Simple Edition Step 1: user starts session with command: screen Step 2: other user (logged in with same user account) connects with command: screen -x Done. Both users are connected to the same CLI sessio…
The goal of this video is to provide viewers with basic examples to understand opening and writing to files in the C programming language.
The goal of this video is to provide viewers with basic examples to understand how to create, access, and change arrays in the C programming language.

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

20 Experts available now in Live!

Get 1:1 Help Now