Method printf

src/log.cpp:50–74

}

size_t LogStreamClass::printf(const char * format, ...) {
// https://stackoverflow.com/questions/3530771/passing-variable-arguments-to-another-function-that-accepts-a-variable-argument
// https://stackoverflow.com/questions/1056411/how-to-pass-variable-number-of-arguments-to-printf-sprintf

  size_t res;
  va_list args;
  va_start(args, format);

  // maximum number of characters in log message
  char buf[1000];
  vsnprintf(buf, sizeof(buf), format, args);

  // print out #1: Serial
  #if defined(useSerial)
  res = Serial.printf(MY_LOG_FORMAT("%s"), buf);
  #endif

  // print out #2: TelnetStream
  #if defined(useTelnetStream)
  res = TelnetStream.printf(MY_LOG_FORMAT("%s"), buf);
  #endif

  va_end(args);
  return res;
};

LogStreamClass Log;