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Enable debug logging in application?

Hello everyone,

Im working on an application that I want to have the option to enable debug logging in realtime. Right now a log of message are written to the log while I test/develop things. Rather than leave all this logging on constantly I want to have it off by default and optionally turn it on.

So far my thoughts are to have a module variable (or possibly several) each enable different debug options. Then in the code I could do something like:

Code:

if (DEBUG_THIS_THING == true) {

 //log some stuff.

}

Then in my application I can have a command "debug this_think" and "no debug this_thing" to turn the logs on/off as needed without having to recompile or anything.

Is there a better way of doing this? Maybe a bitmask that would allow multiple logging levels for each component?

Hi,

I'd be tempted to use existing libraries for this. You didn't say what language, but from your pseudo code it looks like it could be c++, so perhaps you could use boost.
http://www.boost.org/doc/libs/1_56_0...tml/index.html

HTH,

Evo2.

I have kept non-packaged libraries to a min in my application so far (I have one). The application is in C sorry I didn't mention that. Boost has some great capabilities though. I could possibly emulate some of those maybe?

Code:

int DEBUG_THIS_TRACE = 0;

int DEBUG_THIS_DEBUG = 0;

int DEBUG_THIS_INFO = 0;

int DEBUG_THIS_WARNING = 0;

int DEBUG_THIS_ERROR = 0;

int DEBUG_THIS_FATAL = 0;



int mylogger(int debug, char *message) {



    if(debug) {

        writetomylog(message);

    }

}



int main(int, char*[]){

    mylogger(DEBUG_THIS_INFO, "log this");

}

Another idea is to use a single variable with a bitmask? Im not even sure how to do this but if ALL is logged then any error level is logged or you should be able to enable them individually.

Code:

#define LOG_OFF                0        \\ Logging Level 0

#define LOG_FATAL        1        \\ Logging Level 1

#define LOG_ERROR        2        \\ Logging Level 2

#define LOG_WARN        4        \\ Logging Level 3

#define LOG_DEBUG        8        \\ Logging Level 4

#define LOG_INFO        16        \\ Logging Level 5

#define LOG_TRACE        32        \\ Logging Level 6

#define LOG_ALL                64        \\ Logging Level 7



int LOG_LEVEL        =        LOG_WARN;        \\ Default log everything up to WARN messages (regardless of individual component setting).







int DEBUG_THIS        =        LOG_INFO;        \\ Specific logging option.



int mylogger(int level, int debug, char *message) {



        if((level >= LOG_LEVEL) || ((level & debug) >= level)) {

                writetomylog(message);

        }

}



int main(int, char*[]){

        mylogger(LOG_INFO,DEBUG_THIS, "[info] about something");

}