ssize_t adapterWrite(void* p, const char *buf, size_t n) {
 return ((Print*) p) -> write(buf, n);
}
FILE* openAdapter(void *p) {
 cookie_io_functions_t fncs; 
 fncs.write = adapterWrite; 
 fncs.close = NULL; 
 return fopencookie(p, "w", fncs); 
}
size_t Print::printf(const char *fmt, ...) {
 va_list args;
 va_start(args, fmt);
 FILE* adapter = openAdapter(this);
 size_t len = vfprintf(adapter, fmt, args);
 fclose(adapter);
 va_end(args);
 return len;
}
size_t Print::printf(const __FlashStringHelper *fmt, ...) {
 size_t fmtLen = strlen_P((PGM_P) fmt);
 char format[fmtLen + 1];
 strcpy_P(format, (PGM_P) fmt);
 va_list args;
 va_start(args, fmt);
 FILE* adapter = openAdapter(this);
 size_t len = vfprintf(adapter, format, args);
 fclose(adapter);
 va_end(args);
 return len;
}