use NULL instead of 0 when dealing with pointers

ok guenther@

4 files changed, 24 insertions, 24 deletions

diff --git a/usr.bin/telnet/genget.c b/usr.bin/telnet/genget.c
index aaca4fb4d95..0752f5140e6 100644
--- a/usr.bin/telnet/genget.c
+++ b/usr.bin/telnet/genget.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: genget.c,v 1.4 2014/07/20 06:39:41 guenther Exp $  */
+/*     $OpenBSD: genget.c,v 1.5 2014/07/20 10:32:23 jsg Exp $  */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -71,11 +71,11 @@ genget(char *name, char **table, int stlen)
     char **c, **found;
     int n;
 
-    if (name == 0)
-	return 0;
+    if (name == NULL)
+	return (NULL);
 
-    found = 0;
-    for (c = table; *c != 0; c = (char **)((char *)c + stlen)) {
+    found = NULL;
+    for (c = table; *c != NULL; c = (char **)((char *)c + stlen)) {
 	if ((n = isprefix(name, *c)) == 0)
 	    continue;
 	if (n < 0)		/* exact match */
diff --git a/usr.bin/telnet/main.c b/usr.bin/telnet/main.c
index bfeed1f0c7e..1c202d0ebce 100644
--- a/usr.bin/telnet/main.c
+++ b/usr.bin/telnet/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.27 2014/07/20 10:18:10 guenther Exp $	*/
+/*	$OpenBSD: main.c,v 1.28 2014/07/20 10:32:23 jsg Exp $	*/
 /*	$NetBSD: main.c,v 1.5 1996/02/28 21:04:05 thorpej Exp $	*/
 
 /*
@@ -191,7 +191,7 @@ main(argc, argv)
 		*argp++ = argv[0];		/* host */
 		if (argc > 1)
 			*argp++ = argv[1];	/* port */
-		*argp = 0;
+		*argp = NULL;
 
 		if (setjmp(toplevel) != 0)
 			Exit(0);
@@ -202,7 +202,7 @@ main(argc, argv)
 	}
 	(void)setjmp(toplevel);
 	for (;;) {
-		command(1, 0, 0);
+		command(1, NULL, 0);
 	}
 	return 0;
 }
diff --git a/usr.bin/telnet/ring.c b/usr.bin/telnet/ring.c
index 6c3d559ffd4..92efb304b90 100644
--- a/usr.bin/telnet/ring.c
+++ b/usr.bin/telnet/ring.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ring.c,v 1.9 2014/07/20 09:59:42 guenther Exp $	*/
+/*	$OpenBSD: ring.c,v 1.10 2014/07/20 10:32:23 jsg Exp $	*/
 /*	$NetBSD: ring.c,v 1.7 1996/02/28 21:04:07 thorpej Exp $	*/
 
 /*
@@ -127,7 +127,7 @@ ring_at_mark(ring)
 ring_clear_mark(ring)
     Ring *ring;
 {
-    ring->mark = 0;
+    ring->mark = NULL;
 }
 
 /*
@@ -155,7 +155,7 @@ ring_consumed(ring, count)
 
     if (ring->mark &&
 		(ring_subtract(ring, ring->mark, ring->consume) < count)) {
-	ring->mark = 0;
+	ring->mark = NULL;
     }
     ring->consume = ring_increment(ring, ring->consume, count);
     ring->consumetime = ++ring_clock;
@@ -211,7 +211,7 @@ ring_empty_consecutive(ring)
 ring_full_count(ring)
     Ring *ring;
 {
-    if ((ring->mark == 0) || (ring->mark == ring->consume)) {
+    if ((ring->mark == NULL) || (ring->mark == ring->consume)) {
 	if (ring_full(ring)) {
 	    return ring->size;	/* nothing consumed, but full */
 	} else {
@@ -230,7 +230,7 @@ ring_full_count(ring)
 ring_full_consecutive(ring)
     Ring *ring;
 {
-    if ((ring->mark == 0) || (ring->mark == ring->consume)) {
+    if ((ring->mark == NULL) || (ring->mark == ring->consume)) {
 	if ((ring->supply < ring->consume) || ring_full(ring)) {
 	    return ring_subtract(ring, ring->top, ring->consume);
 	} else {
diff --git a/usr.bin/telnet/telnet.c b/usr.bin/telnet/telnet.c
index e473b9993d9..e1cde5fc4a8 100644
--- a/usr.bin/telnet/telnet.c
+++ b/usr.bin/telnet/telnet.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: telnet.c,v 1.26 2014/07/20 10:18:10 guenther Exp $	*/
+/*	$OpenBSD: telnet.c,v 1.27 2014/07/20 10:32:23 jsg Exp $	*/
 /*	$NetBSD: telnet.c,v 1.7 1996/02/28 21:04:15 thorpej Exp $	*/
 
 /*
@@ -84,7 +84,7 @@ int
 	globalmode,
 	clienteof = 0;
 
-char *prompt = 0;
+char *prompt = NULL;
 
 int scheduler_lockout_tty = 0;
 
@@ -457,7 +457,7 @@ dontoption(option)
 int is_unique(char *, char **, char **);
 
 static char *name_unknown = "UNKNOWN";
-static char *unknown[] = { 0, 0 };
+static char *unknown[] = { NULL, NULL };
 
 	char **
 mklist(buf, name)
@@ -468,7 +468,7 @@ mklist(buf, name)
 
 	if (name) {
 		if ((int)strlen(name) > 40) {
-			name = 0;
+			name = NULL;
 			unknown[0] = name_unknown;
 		} else {
 			unknown[0] = name;
@@ -487,13 +487,13 @@ mklist(buf, name)
 	 * Allocate an array to put the name pointers into
 	 */
 	argv = (char **)malloc((n+3)*sizeof(char *));
-	if (argv == 0)
+	if (argv == NULL)
 		return(unknown);
 
 	/*
 	 * Fill up the array of pointers to names.
 	 */
-	*argv = 0;
+	*argv = NULL;
 	argvp = argv+1;
 	n = 0;
 	for (cp = cp2 = buf; (c = *cp);  cp++) {
@@ -554,9 +554,9 @@ mklist(buf, name)
 	 */
 	cp = *(argvp-1);
 	*argvp++ = cp;
-	*argvp = 0;
+	*argvp = NULL;
 
-	if (*argv == 0) {
+	if (*argv == NULL) {
 		if (name)
 			*argv = name;
 		else {
@@ -591,7 +591,7 @@ int resettermname = 1;
 gettermname()
 {
 	char *tname;
-	static char **tnamep = 0;
+	static char **tnamep = NULL;
 	static char **next;
 	int errret;
 
@@ -612,7 +612,7 @@ gettermname()
 		}
 		next = tnamep;
 	}
-	if (*next == 0)
+	if (*next == NULL)
 		next = tnamep;
 	return(*next++);
 }
@@ -928,7 +928,7 @@ slc_init()
 	localchars = 1;
 	for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) {
 		spcp->val = 0;
-		spcp->valp = 0;
+		spcp->valp = NULL;
 		spcp->flags = spcp->mylevel = SLC_NOSUPPORT;
 	}