Question

I’m not very good with terminology.. here’s the code I have:

enum {
    LoggerLogNone        = 0,
    LoggerLogMessages    = 1 << 0,
    LoggerLogErrors      = 1 << 1
};
typedef NSUInteger LoggerLogs;

And what I’d like to do is use LoggerLogs in my logic when determining whether or not it should be logged. So in my log:(NSString *)message I want it to log ONLY if the user set LoggerLogMessages, and for logError:(NSString *)error I want it to log ONLY if the user set LoggerLogErrors..
I know how to set them:

LoggerLogs logs = LoggerLogMessages | LoggerLogErrors;

What I don’t know how to do is check if LoggerLogMessages or LoggerLogErrors is checked.
Any help would be greatly appreciated. I’m sure this is answered here somewhere, but since I don’t know the terms to use, it’s really hard to search for >_<

Answer 1

- (void)log:(NSString *)message {
    if (logs & LoggerLogMessages) {
        NSLog(@"message: %@", message);
    }
}

- (void)logError:(NSString *)error {
    if (logs & LoggerLogErrors) {
        NSLog(@"error: %@", error);
    }
}

Both << and & are called bitwise operators. If you google bitwise operators C, you’ll find lots of explanations.