f.w = fp->w - strlen (cc->prefix) - strlen (cc->suffix);
if (number < 0)
f.w -= strlen (cc->neg_prefix) + strlen (cc->neg_suffix) - 1;
f.w = fp->w - strlen (cc->prefix) - strlen (cc->suffix);
if (number < 0)
f.w -= strlen (cc->neg_prefix) + strlen (cc->neg_suffix) - 1;