$NetBSD: patch-ad,v 1.2 2010/12/28 08:25:20 obache Exp $

--- screen.c.orig	1999-02-22 16:52:34 -0500
+++ screen.c
@@ -36,6 +36,7 @@
 #elif defined(HAVE_LIBGEN_H)
 #include <libgen.h>
 #endif
+#include <errno.h>
 
 #include "compat.h"
 #include "tty.h"
@@ -66,7 +67,7 @@
 struct ircpage {
 	struct ircwin	*ipg_iwa;
 	struct ircwin	*ipg_iwc;
-	CIRCLEQ_ENTRY(ircpage) ipg_entries;
+	TAILQ_ENTRY(ircpage) ipg_entries;
 	int		ipg_upd;
 }; 
 
@@ -99,7 +100,7 @@
 static int	dodisplay;	/* if 0, window updates and clock won't be
 				 * displayed (for example when in opt editor */
 
-CIRCLEQ_HEAD(, ircpage)	pages_head;
+TAILQ_HEAD(, ircpage)	pages_head = TAILQ_HEAD_INITIALIZER(pages_head);
 
 #define	IW_USED		1
 #define IW_VISIBLE	2
@@ -109,7 +110,6 @@
 extern void	(*othercmd) __P((char *));
 extern int	on_irc;
 extern int	umd;
-extern int	errno;
 extern int	is_away;
 
 char		*prompt;
@@ -167,7 +167,7 @@
 	tty_gotoxy(0, 0);
 	tty_flush();
 
-	CIRCLEQ_INIT(&pages_head);
+	TAILQ_INIT(&pages_head);
 	cpage = NULL;
 	cpageno = 0;
 	otherpage = 0;
@@ -307,8 +307,8 @@
 	}
 
 	/* Else try the other pages */
-	for (ipg = pages_head.cqh_first; ipg != (struct ircpage *)&pages_head;
-	    ipg = ipg->ipg_entries.cqe_next) {
+	for (ipg = pages_head.tqh_first; ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next) {
 	    ipg_switchtopg(ipg);
 
 	    /*
@@ -656,9 +656,9 @@
 	struct channel *ch;
 	struct ircpage *ipg, *savepg = cpage;
 
-	for (ipg = pages_head.cqh_first;
-	    ipg != (struct ircpage *) &pages_head;
-	    ipg = ipg->ipg_entries.cqe_next) {
+	for (ipg = pages_head.tqh_first;
+	    ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next) {
 	    ipg_switchtopg(ipg);
 	    /*
 	     * Traverse the window list. For each window, iterate through
@@ -987,8 +987,8 @@
 {
 	struct ircpage *ipg, *savepg = cpage;
 
-	for (ipg = pages_head.cqh_first; ipg != (struct ircpage *)&pages_head;
-	    ipg = ipg->ipg_entries.cqe_next) {
+	for (ipg = pages_head.tqh_first; ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next) {
 		ipg_switchtopg(ipg);
 		equalwin();
 	}
@@ -1099,8 +1099,8 @@
 	strcpy(t, cname);
 	h = elf_hash(irc_strupr(t));
 
-	for (ipg = pages_head.cqh_first; ipg != (struct ircpage *) &pages_head;
-	    ipg = ipg->ipg_entries.cqe_next) {
+	for (ipg = pages_head.tqh_first; ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next) {
 		ipg_switchtopg(ipg);
 
 		w = iwa;
@@ -2163,8 +2163,8 @@
 	struct ircwin *iw;
 	struct ircpage *ipg;
 
-	for (ipg = pages_head.cqh_first; ipg != (struct ircpage *) &pages_head;
-	    ipg = ipg->ipg_entries.cqe_next)
+	for (ipg = pages_head.tqh_first; ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next)
 		for (iw = ipg->ipg_iwa; iw != NULL; iw = iw->iw_next)
 			reformat_backscroll(iw, t_columns);
 }
@@ -2197,7 +2197,7 @@
 	ipg->ipg_iwa = iwa;
 	ipg->ipg_iwc = iwc;
 	ipg->ipg_upd = 0;
-	CIRCLEQ_INSERT_TAIL(&pages_head, ipg, ipg_entries);
+	TAILQ_INSERT_TAIL(&pages_head, ipg, ipg_entries);
 	otherpage = cpageno;
 	cpageno = numpages++;
 	set_prompt(NULL);
@@ -2214,11 +2214,9 @@
 	int newpg;
 
 	if (iwa == NULL || (iwa->iw_next == NULL && iwa->iw_ch == NULL)) {
-		if (ipg->ipg_entries.cqe_prev !=
-		    (struct ircpage *) &pages_head)
+		if (*(ipg->ipg_entries.tqe_prev) != NULL)
 			newpg = cpageno - 1;
-		else if (ipg->ipg_entries.cqe_next !=
-		    (struct ircpage *) &pages_head)
+		else if (ipg->ipg_entries.tqe_next != NULL)
 			newpg = cpageno + 1;
 		else {
 			iw_printf(COLI_TEXT, "%sCannot remove the only page\n",
@@ -2235,7 +2233,7 @@
 		}
 
 		ipg_switchto(newpg, 1);
-		CIRCLEQ_REMOVE(&pages_head, ipg, ipg_entries);
+		TAILQ_REMOVE(&pages_head, ipg, ipg_entries);
 		free(ipg);
 		numpages--;
 		set_prompt(NULL);
@@ -2256,11 +2254,11 @@
 	struct ircpage *ipg;
 	int pns = pageno;
 
-	for (ipg = pages_head.cqh_first;
-	    ipg != (struct ircpage *) &pages_head && pageno > 0;
-	    ipg = ipg->ipg_entries.cqe_next, pageno--)
+	for (ipg = pages_head.tqh_first;
+	    ipg != NULL && pageno > 0;
+	    ipg = ipg->ipg_entries.tqe_next, pageno--)
 		;
-	if (pageno == 0 && ipg != (struct ircpage *) &pages_head) {
+	if (pageno == 0 && ipg != NULL) {
 		ipg_switchtopg(ipg);
 		set_prompt(NULL);
 		otherpage = cpageno;
@@ -2312,9 +2310,9 @@
 
 	pline[0] = 0;
 
-	for (i = 0, ipg = pages_head.cqh_first; i < numpages &&
-	    ipg != (struct ircpage *) &pages_head;
-	    i++, ipg = ipg->ipg_entries.cqe_next) {
+	for (i = 0, ipg = pages_head.tqh_first; i < numpages &&
+	    ipg != NULL;
+	    i++, ipg = ipg->ipg_entries.tqe_next) {
 		if (ipg != cpage)
 			sprintf(t, "-%d-", i);
 		else
@@ -2352,9 +2350,9 @@
 	struct ircpage *ipg;
 	int i, n = 1;
 	
-	for (i = 0, ipg = pages_head.cqh_first;
-	    ipg != (struct ircpage *) &pages_head;
-	    ipg = ipg->ipg_entries.cqe_next, i++)
+	for (i = 0, ipg = pages_head.tqh_first;
+	    ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next, i++)
 		if (ipg->ipg_upd)
 			pglist[n++] = i + '0';
 	if (n > 1) {
@@ -2378,9 +2376,9 @@
 	struct ircpage *ipg;
 	int i;
 	
-	for (i = 0, ipg = pages_head.cqh_first;
-	    ipg != (struct ircpage *) &pages_head;
-	    ipg = ipg->ipg_entries.cqe_next, i++)
+	for (i = 0, ipg = pages_head.tqh_first;
+	    ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next, i++)
 		if (ipg->ipg_upd)
 			pupd |= 1 << i;
 	if (force_update)
@@ -2434,8 +2432,8 @@
 	struct ircwin *w;
 	struct channel *ch;
 
-	for (ipg = pages_head.cqh_first; ipg != (struct ircpage *)&pages_head;
-	    ipg = ipg->ipg_entries.cqe_next)
+	for (ipg = pages_head.tqh_first; ipg != NULL;
+	    ipg = ipg->ipg_entries.tqe_next)
 	    	for (w = iwa; w != NULL && w->iw_flags & IW_USED;
 		    w = w->iw_next)
 			for (ch = w->iw_ch; ch != NULL; ch = ch->ch_wnext)