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I had my own logger based on usage of vfprintf function which prints output log into the file with arguments sending into it without having extra buffer until I will send it into the stream. I trying to use SDL_RWops because of native UTF8 support in file paths (however, manual getting the FILE* descriptor from utf8 path is easy, but requires extra function calls on Windows to convert into UTF16 until I'll be able to call _wfopen()).

Would be cool if we can have SDL_RWprintV()-like function which receives format string with va_list thing which also would be useful to send formatted string DIRECTLY into real file stream without any middle buffers. The implementation I made over existing API uses vsnprintf with a middle buffer which is not a good solution (especially in a case when is needed to send buffer data directly into file stream).

Note: I know about SDL_Log, but because of 4096 buffer size limit in some cases may be not good. I also using logger to store crash dumps (which are may have any size)