Code

class AP_HAL::BetterStream : public AP_HAL::Stream {
public:
    BetterStream(void) {}

    virtual void print_P(const prog_char_t *) = 0;
    virtual void println_P(const prog_char_t *) = 0;
    virtual void printf(const char *, ...)
                        __attribute__ ((format(__printf__, 2, 3))) = 0;
    /* No format checking on printf_P: can't currently support that on AVR */
    virtual void _printf_P(const prog_char *, ...) = 0;

#define printf_P(fmt, ...) _printf_P((const prog_char *)fmt, ## __VA_ARGS__)
   
    virtual void vprintf(const char *, va_list) = 0;
    virtual void vprintf_P(const prog_char *, va_list) = 0;
};

#endif // __AP_HAL_UTILITY_BETTERSTREAM_H__