Reputation: 763
I am making a small system and I want to be able to toggle "verbose" text output in the whole system.
I have made a file called globals.h:
namespace REBr{
extern bool console_verbose = false;
}
If this is true I want all my classes to print a message to the console when they are constructing, destructing, copying or doing pretty much anything.
For example:
window(string title="",int width=1280,int height=720):
Width(width),Height(height),title(title)
{
if(console_verbose){
std::cout<<"Generating window #"<<this->instanceCounter;
std::cout<<"-";
}
this->window=SDL_CreateWindow(title.c_str(),0,0,width,height,SDL_WINDOW_OPENGL);
if(console_verbose)
std::cout<<"-";
if(this->window)
{
this->glcontext = SDL_GL_CreateContext(window);
if(console_verbose)
std::cout<<".";
if(this->glcontext==NULL)
{
std::cout<<"FATAL ERROR IN REBr::WINDOW::CONSTR_OPENGLCONTEXT: "<<SDL_GetError()<<std::endl;
}
}
else std::cout<<"FATAL ERROR IN REBr::WINDOW::CONSTR_WINDOW: "<<SDL_GetError()<<std::endl;
if(console_verbose)
std::cout<<">done!"<<endl;
}
Now as you can see I have a lot of ifs in that constructor. And I REALLY dont want that since that will slow down my application. I need this to be as fast as possible without removing the "loading bar" (this helps me determine at which function the program stopped functioning).
What is the best/fastest way to accomplish this?
Everying in my system is under the namespace REBr
Upvotes: 0
Views: 1456
Reputation: 1236
Some variants to achieve that:
if
s in compiled program. But if
s will still be in code, so it looks kinda bulky.Anyway, all these options require program recompilation. W/o recompilation it is impossible to achieve the maximum speed.
Upvotes: 1
Reputation: 21560
Google's logging module is widely used in the industry and supports logging levels that you can set from the command line. For example (taken from their documentation)
VLOG(1) << "I'm printed when you run the program with --v=1 or higher";
VLOG(2) << "I'm printed when you run the program with --v=2 or higher";
You can find the code here https://github.com/google/glog and the documentation in the doc/
folder.
Upvotes: 0
Reputation: 2310
I often use a Logger class that supports debug levels. A call might look like:
logger->Log(debugLevel, "%s %s %d %d", timestamp, msg, value1, value2);
The Logger class supports multiple debug levels so that I can fine tune the debug output. This can be set at any time through the command line or with a debugger. The Log statement uses a variable length argument list much like printf.
Upvotes: 0