11 void (*range_set)(void *, int range);
12 void (*value_set)(void *, void *, int value);
13 void (*value_add)(void *, void *, int value);
14 void (*label_set)(void *, const char *str, ...);
18 void (*append)(void *, const char *, ...);
19 void (*append_va)(void *, const char *, va_list);
21 extern const struct gauge GAUGE_DUMMY;