Replace N #defines with nitems to simplify ifconfig code slightly

MFC after: 1 week

sbin/ifconfig/af_inet6.c

@@ -521,7 +521,6 @@ static struct option in6_Lopt = {
 static __constructor void
 inet6_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
 #ifndef RESCUE
@@ -529,9 +528,8 @@ inet6_ctor(void)
 		return;
 #endif
 
-	for (i = 0; i < N(inet6_cmds);  i++)
+	for (i = 0; i < nitems(inet6_cmds);  i++)
 		cmd_register(&inet6_cmds[i]);
 	af_register(&af_inet6);
 	opt_register(&in6_Lopt);
-#undef N
 }

sbin/ifconfig/carp.c

@@ -217,11 +217,9 @@ static struct afswtch af_carp = {
 static __constructor void
 carp_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	int i;
 
-	for (i = 0; i < N(carp_cmds);  i++)
+	for (i = 0; i < nitems(carp_cmds);  i++)
 		cmd_register(&carp_cmds[i]);
 	af_register(&af_carp);
-#undef N
 }

sbin/ifconfig/ifbridge.c

@@ -749,11 +749,9 @@ static struct afswtch af_bridge = {
 static __constructor void
 bridge_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	int i;
 
-	for (i = 0; i < N(bridge_cmds);  i++)
+	for (i = 0; i < nitems(bridge_cmds);  i++)
 		cmd_register(&bridge_cmds[i]);
 	af_register(&af_bridge);
-#undef N
 }

sbin/ifconfig/ifclone.c

@@ -32,9 +32,9 @@ static const char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
-#include <sys/queue.h>
-#include <sys/types.h>
+#include <sys/param.h>
 #include <sys/ioctl.h>
+#include <sys/queue.h>
 #include <sys/socket.h>
 #include <net/if.h>
 
@@ -184,11 +184,9 @@ static struct option clone_Copt = { .opt = "C", .opt_usage = "[-C]", .cb = clone
 static __constructor void
 clone_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(clone_cmds);  i++)
+	for (i = 0; i < nitems(clone_cmds);  i++)
 		cmd_register(&clone_cmds[i]);
 	opt_register(&clone_Copt);
-#undef N
 }

sbin/ifconfig/ifconfig.c

@@ -43,11 +43,11 @@ static const char rcsid[] =
 
 #include <sys/param.h>
 #include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/time.h>
 #include <sys/module.h>
 #include <sys/linker.h>
 #include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/time.h>
 
 #include <net/ethernet.h>
 #include <net/if.h>
@@ -604,7 +604,6 @@ cmd_register(struct cmd *p)
 static const struct cmd *
 cmd_lookup(const char *name, int iscreate)
 {
-#define	N(a)	(sizeof(a)/sizeof(a[0]))
 	const struct cmd *p;
 
 	for (p = cmds; p != NULL; p = p->c_next)
@@ -618,7 +617,6 @@ cmd_lookup(const char *name, int iscreate)
 			}
 		}
 	return NULL;
-#undef N
 }
 
 struct callback {
@@ -1387,10 +1385,8 @@ static struct cmd basic_cmds[] = {
 static __constructor void
 ifconfig_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(basic_cmds);  i++)
+	for (i = 0; i < nitems(basic_cmds);  i++)
 		cmd_register(&basic_cmds[i]);
-#undef N
 }

sbin/ifconfig/iffib.c

@@ -113,11 +113,9 @@ static struct afswtch af_fib = {
 static __constructor void
 fib_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(fib_cmds);  i++)
+	for (i = 0; i < nitems(fib_cmds);  i++)
 		cmd_register(&fib_cmds[i]);
 	af_register(&af_fib);
-#undef N
 }

sbin/ifconfig/ifgre.c

@@ -113,11 +113,9 @@ static struct afswtch af_gre = {
 static __constructor void
 gre_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(gre_cmds);  i++)
+	for (i = 0; i < nitems(gre_cmds);  i++)
 		cmd_register(&gre_cmds[i]);
 	af_register(&af_gre);
-#undef N
 }

sbin/ifconfig/ifgroup.c

@@ -28,7 +28,7 @@ static const char rcsid[] =
   "$FreeBSD$";
 #endif /* not lint */
 
-#include <sys/types.h>
+#include <sys/param.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <net/if.h>
@@ -174,12 +174,10 @@ static struct option group_gopt = { "g:", "[-g groupname]", printgroup };
 static __constructor void
 group_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	int i;
 
-	for (i = 0; i < N(group_cmds);  i++)
+	for (i = 0; i < nitems(group_cmds);  i++)
 		cmd_register(&group_cmds[i]);
 	af_register(&af_group);
 	opt_register(&group_gopt);
-#undef N
 }

sbin/ifconfig/ifieee80211.c

@@ -2856,7 +2856,6 @@ printrsnie(const char *tag, const u_int8_t *ie, size_t ielen, int maxlen)
 static void
 printwpsie(const char *tag, const u_int8_t *ie, size_t ielen, int maxlen)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	u_int8_t len = ie[1];
 
 	printf("%s", tag);
@@ -2897,7 +2896,7 @@ printwpsie(const char *tag, const u_int8_t *ie, size_t ielen, int maxlen)
 				break;
 			case IEEE80211_WPS_DEV_PASS_ID:
 				n = LE_READ_2(ie);
-				if (n < N(dev_pass_id))
+				if (n < nitems(dev_pass_id))
 					printf(" dpi:%s", dev_pass_id[n]);
 				break;
 			case IEEE80211_WPS_UUID_E:
@@ -2911,7 +2910,6 @@ printwpsie(const char *tag, const u_int8_t *ie, size_t ielen, int maxlen)
 		}
 		printf(">");
 	}
-#undef N
 }
 
 static void
@@ -3418,7 +3416,6 @@ list_stations(int s)
 static const char *
 mesh_linkstate_string(uint8_t state)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	static const char *state_names[] = {
 	    [0] = "IDLE",
 	    [1] = "OPEN-TX",
@@ -3428,13 +3425,12 @@ mesh_linkstate_string(uint8_t state)
 	    [5] = "HOLDING",
 	};
 
-	if (state >= N(state_names)) {
+	if (state >= nitems(state_names)) {
 		static char buf[10];
 		snprintf(buf, sizeof(buf), "#%u", state);
 		return buf;
 	} else
 		return state_names[state];
-#undef N
 }
 
 static const char *
@@ -5320,12 +5316,10 @@ static struct afswtch af_ieee80211 = {
 static __constructor void
 ieee80211_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	int i;
 
-	for (i = 0; i < N(ieee80211_cmds);  i++)
+	for (i = 0; i < nitems(ieee80211_cmds);  i++)
 		cmd_register(&ieee80211_cmds[i]);
 	af_register(&af_ieee80211);
 	clone_setdefcallback("wlan", wlan_create);
-#undef N
 }

sbin/ifconfig/iflagg.c

@@ -308,11 +308,9 @@ static struct afswtch af_lagg = {
 static __constructor void
 lagg_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	int i;
 
-	for (i = 0; i < N(lagg_cmds);  i++)
+	for (i = 0; i < nitems(lagg_cmds);  i++)
 		cmd_register(&lagg_cmds[i]);
 	af_register(&af_lagg);
-#undef N
 }

sbin/ifconfig/ifmac.c

@@ -111,11 +111,9 @@ static struct afswtch af_mac = {
 static __constructor void
 mac_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(mac_cmds);  i++)
+	for (i = 0; i < nitems(mac_cmds);  i++)
 		cmd_register(&mac_cmds[i]);
 	af_register(&af_mac);
-#undef N
 }

sbin/ifconfig/ifmedia.c

@@ -845,11 +845,9 @@ static struct afswtch af_media = {
 static __constructor void
 ifmedia_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(media_cmds);  i++)
+	for (i = 0; i < nitems(media_cmds);  i++)
 		cmd_register(&media_cmds[i]);
 	af_register(&af_media);
-#undef N
 }

sbin/ifconfig/ifpfsync.c

@@ -26,7 +26,7 @@
  * $FreeBSD$
  */
 
-#include <sys/types.h>
+#include <sys/param.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 
@@ -227,11 +227,9 @@ static struct afswtch af_pfsync = {
 static __constructor void
 pfsync_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	int i;
 
-	for (i = 0; i < N(pfsync_cmds);  i++)
+	for (i = 0; i < nitems(pfsync_cmds);  i++)
 		cmd_register(&pfsync_cmds[i]);
 	af_register(&af_pfsync);
-#undef N
 }

sbin/ifconfig/ifvlan.c

@@ -194,13 +194,11 @@ static struct afswtch af_vlan = {
 static __constructor void
 vlan_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(vlan_cmds);  i++)
+	for (i = 0; i < nitems(vlan_cmds);  i++)
 		cmd_register(&vlan_cmds[i]);
 	af_register(&af_vlan);
 	callback_register(vlan_cb, NULL);
 	clone_setdefcallback("vlan", vlan_create);
-#undef N
 }

sbin/ifconfig/ifvxlan.c

@@ -635,13 +635,11 @@ static struct afswtch af_vxlan = {
 static __constructor void
 vxlan_ctor(void)
 {
-#define	N(a)	(sizeof(a) / sizeof(a[0]))
 	size_t i;
 
-	for (i = 0; i < N(vxlan_cmds); i++)
+	for (i = 0; i < nitems(vxlan_cmds); i++)
 		cmd_register(&vxlan_cmds[i]);
 	af_register(&af_vxlan);
 	callback_register(vxlan_cb, NULL);
 	clone_setdefcallback("vxlan", vxlan_create);
-#undef N
 }