A simple printf like interpolation for Arduino

code.md

serial_printi()

This simple function does an interpolation on a formatted string similar to printf().

Its meant to be flexible and small.

void serial_printi(const char *format, ...){
	
	char ch;
	bool flgInterpolate = false;
	va_list args;
	va_start( args, format );
	for( ; *format ; ++format ){
		ch = *format;
		if(flgInterpolate){
			flgInterpolate = false;
			if((ch=='d') || (ch=='c')){
				Serial.print(va_arg(args, int));
			}else if(ch=='s'){
				Serial.print(va_arg(args, char*));
			}else if(ch=='o'){
				Serial.print(va_arg(args, unsigned int));
			}else if((ch=='f') || (ch=='e') || (ch=='a') || (ch=='g')){
				Serial.print(va_arg(args, double));
			}else{
				Serial.print('%');
				Serial.print(ch);
			}
		}else if(ch=='%'){
			flgInterpolate = true;
		}else{
			Serial.print(ch);
		}
	}
	
	va_end( args );
}

Use

serial_printi("Hello %s\n", "Jose");
serial_printi("Hello X=%d F=%f\n", 25, 340.36);

Notes

Use "%d", "%c" for int, char, long, short, and other values that can be casted to int.

Use "%s" for char *.

Use "%f" for double or float or similar values that can be casted to double.

This function does NO type checking.