code: drawterm

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ref: 1c709767b27d295d7df975a3e441191a4c8fcba1
parent: 679555dbb5cc3eb650566395231e3f01167d6976
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Mon Jan 28 18:00:09 EST 2019 

devdraw: simplify drawgen() (from 9front)


--- a/kern/devdraw.c
+++ b/kern/devdraw.c
@@ -236,31 +236,36 @@
 	 * Top level directory contains the name of the device.
 	 */
 	t = QID(c->qid);
-	if(t == Qtopdir || t == Qwinname){
-		if(s == 1 || t == Qwinname){
-			mkqid(&q, Qwinname, 0, QTFILE);
-			devdir(c, q, "winname", 0, eve, 0444, dp);
-		}
-		else if(s == 0){
+	switch(t){
+	case Qtopdir:
+		if(s == 0){
 			mkqid(&q, Q2nd, 0, QTDIR);
 			devdir(c, q, "draw", 0, eve, 0555, dp);
+			return 1;
 		}
-		else
-			return -1;
-		return 1;
+		if(s == 1){
+	case Qwinname:
+			mkqid(&q, Qwinname, 0, QTFILE);
+			devdir(c, q, "winname", 0, eve, 0444, dp);
+			return 1;
+		}
+		return -1;
 	}
 
 	/*
 	 * Second level contains "new" plus all the clients.
 	 */
-	if(t == Q2nd || t == Qnew){
+	switch(t){
+	case Q2nd:
 		if(s == 0){
+	case Qnew:
 			mkqid(&q, Qnew, 0, QTFILE);
 			devdir(c, q, "new", 0, eve, 0666, dp);
+			return 1;
 		}
-		else if(s <= sdraw.nclient){
+		if(s <= sdraw.nclient){
 			cl = sdraw.client[s-1];
-			if(cl == 0)
+			if(cl == nil)
 				return 0;
 			sprint(up->genbuf, "%d", cl->clientid);
 			mkqid(&q, (s<<QSHIFT)|Q3rd, 0, QTDIR);
@@ -267,9 +272,7 @@
 			devdir(c, q, up->genbuf, 0, eve, 0555, dp);
 			return 1;
 		}
-		else
-			return -1;
-		return 1;
+		return -1;
 	}
 
 	/*