Cross-Platform-Logger-Demo-ObC-and-Cpp:

Cross-platform logger for OSX, iOS, Android and C++, integrates with Crashlytics. Attempts to be thread-safe and type-safe. Provides flexible formatting options, courtesty of the fmt library, from http://www.fmtlib.net.

Usage:

Include the header "Logger.hpp" in the files you want to log from. The header can only be included from C++ or Objective-C++ files (but not Objective-C files... E.g. for OSX/iOS, don't include from AppDelegate.m).

For iOS, set the pre-processor value: #define QX_IOS For Android, set the pre-processor value: #define QX_ANDROID

Implementation Notes:

See:

• http://www.sureshjoshi.com/mobile/cross-platform-mobile-logging-macro/
• http://stackoverflow.com/questions/10921108/objective-c-preprocessor-definition-dynamic-c-string-to-nsstring-declaration

Note 1: The use of macro functions here is extensive, so that __FILE__, __LINE__, etc will reflect the details of the caller, and not the logging functions themselves.

Note 2: ##__VA_ARGS__ used instead of __VA_ARGS__ to allow for format-only strings, e.g to avoid a trailing comma: printf("Hi",) for some compilers which don't automatically omit it. GCC and VisualStudio support this. Clang does too, at least for the Mac.

Note 3: A trick to having multiple statements, local vars, etc, within a pre-processor macro is to put them in the body of a do...while loop.