From bc28498260f41663c2bc337c133e79c60cf8fcbc Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 6 Nov 1999 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1999-11-06

---
 pc/vga.c       |  6 +++---
 port/devdraw.c |  6 +++---
 port/devsdp.c  | 19 +++++++++++++++----
 3 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/pc/vga.c b/pc/vga.c
index 7732e446227d88e9760b0e25a166585fe6cabdd2..d7b72dc290227ed281c84da391ca2ca0f6580a6c 100644
--- a/pc/vga.c
+++ b/pc/vga.c
@@ -97,7 +97,7 @@ vgascreenputc(VGAscr* scr, char* buf, Rectangle *flushr)
 		pos = 4-(pos%4);
 		r = Rect(curpos.x, curpos.y, curpos.x+pos*w, curpos.y+h);
 		memimagedraw(scr->gscreen, r, back, back->r.min, nil, ZP);
-		bbox(flushr, r);
+		combinerect(flushr, r);
 		curpos.x += pos*w;
 		break;
 
@@ -107,7 +107,7 @@ vgascreenputc(VGAscr* scr, char* buf, Rectangle *flushr)
 		xp--;
 		r = Rect(*xp, curpos.y, curpos.x, curpos.y+h);
 		memimagedraw(scr->gscreen, r, back, back->r.min, nil, ZP);
-		bbox(flushr, r);
+		combinerect(flushr, r);
 		curpos.x = *xp;
 		break;
 
@@ -122,7 +122,7 @@ vgascreenputc(VGAscr* scr, char* buf, Rectangle *flushr)
 		r = Rect(curpos.x, curpos.y, curpos.x+w, curpos.y+h);
 		memimagedraw(scr->gscreen, r, back, back->r.min, nil, back->r.min);
 		memimagestring(scr->gscreen, curpos, conscol, scr->memdefont, buf);
-		bbox(flushr, r);
+		combinerect(flushr, r);
 		curpos.x += w;
 	}
 //	drawdebug = 0;
diff --git a/port/devdraw.c b/port/devdraw.c
index 9dc022356d50074c51ce3688c7412405e1d16b2e..57da6d6d8b1c94e98f8eadca10f8fa3179e18909 100644
--- a/port/devdraw.c
+++ b/port/devdraw.c
@@ -287,7 +287,7 @@ drawrefresh(Memimage *l, Rectangle r, void *v)
 	d = x->dimage;
 	for(ref=c->refresh; ref; ref=ref->next)
 		if(ref->dimage == d){
-			bbox(&ref->r, r);
+			combinerect(&ref->r, r);
 			return;
 		}
 	ref = malloc(sizeof(Refresh));
@@ -314,7 +314,7 @@ addflush(Rectangle r)
 		return;
 	}
 	nbb = flushrect;
-	bbox(&nbb, r);
+	combinerect(&nbb, r);
 	ar = Dx(r)*Dy(r);
 	abb = Dx(flushrect)*Dy(flushrect);
 	anbb = Dx(nbb)*Dy(nbb);
@@ -349,7 +349,7 @@ dstflush(int dstid, Memimage *dst, Rectangle r)
 	Memlayer *l;
 
 	if(dstid == 0){
-		bbox(&flushrect, r);
+		combinerect(&flushrect, r);
 		return;
 	}
 	l = dst->layer;
diff --git a/port/devsdp.c b/port/devsdp.c
index 9de273658f170c500b3c4e2666aca4841b16e450..65959f564f5a19e7c737a2ae9a47783a391f6107 100644
--- a/port/devsdp.c
+++ b/port/devsdp.c
@@ -1185,7 +1185,7 @@ print("dup sequence number: %ld (%ld %ld)\n", seq, c->in.seqwrap, seqdiff);
 if(0) print("coniput seq=%ulx\n", seq);
 	if(c->in.auth != 0) {
 		if(!(*c->in.auth)(&c->in, b->rp-4, BLEN(b)+4)) {
-print("bad auth %d\n", BLEN(b)+4);
+print("bad auth %ld\n", BLEN(b)+4);
 			c->lstats.inBadAuth++;
 			freeb(b);
 			return nil;
@@ -1686,9 +1686,17 @@ static Block *
 readdata(Conv *c, int n)
 {
 	Block *b;
+	int nn;
 
 	for(;;) {
-		b = convreadblock(c, n);
+
+		// some slack for tunneling overhead
+		nn = n + 100;
+
+		// make sure size is big enough for control messages
+		if(nn < 1000)
+			nn = 1000;
+		b = convreadblock(c, nn);
 		if(b == nil)
 			return nil;
 		qlock(c);
@@ -1699,8 +1707,11 @@ readdata(Conv *c, int n)
 		b = conviput(c, b, 0);
 		poperror();
 		qunlock(c);
-		if(b != nil)
+		if(b != nil) {
+			if(BLEN(b) > n)
+				b->wp = b->rp + n;
 			return b;
+		}
 	}
 }
 
@@ -1726,7 +1737,7 @@ writedata(Conv *c, Block *b)
 	c->lstats.outDataPackets++;
 	c->lstats.outDataBytes += n;
 
-	if(c->out.comp != nil && 0) {
+	if(0 && c->out.comp != nil) {
 		// must generate same value as convoput
 		seq = (c->out.seq + 1) & (SeqMax-1);