Function show_stat

tools/netstat/if.c:194–247

* Display a formatted value, or a '-' in the same space. */

 * Display a formatted value, or a '-' in the same space.
 */
static void
show_stat(const char *fmt, int width, const char *name,
    u_long value, short showvalue, int div1000)
{
	const char *lsep, *rsep;
	char newfmt[64];

	lsep = "";
	if (strncmp(fmt, "LS", 2) == 0) {
		lsep = " ";
		fmt += 2;
	}
	rsep = " ";
	if (strncmp(fmt, "NRS", 3) == 0) {
		rsep = "";
		fmt += 3;
	}
	if (showvalue == 0) {
		/* Print just dash. */
		xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
		return;
	}

	/*
	 * XXX: workaround {P:} modifier can't be empty and doesn't seem to
	 * take args... so we need to conditionally include it in the format.
	 */
#define maybe_pad(pad)	do {						    \
	if (strlen(pad)) {						    \
		snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad);	    \
		xo_emit(newfmt);					    \
	}								    \
} while (0)

	if (hflag) {
		char buf[5];

		/* Format in human readable form. */
		humanize_number(buf, sizeof(buf), (int64_t)value, "",
		    HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
		    ((div1000) ? HN_DIVISOR_1000 : 0));
		maybe_pad(lsep);
		snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
		xo_emit(newfmt, buf);
		maybe_pad(rsep);
	} else {
		/* Construct the format string. */
		maybe_pad(lsep);
		snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
		    name, width, fmt);
		xo_emit(newfmt, value);
		maybe_pad(rsep);
	}
}

/*
 * Find next multiaddr for a given interface name.