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rio: move the code for 'send' into a function

Makes the code a bit nicer and allows reusing wsend() in patches.

--- a/sys/src/cmd/rio/dat.h

+++ b/sys/src/cmd/rio/dat.h

@@ -210,6 +210,7 @@

 void		wscrdraw(Window*);

 void		wscroll(Window*, int);

 void		wselect(Window*);

+void		wsend(Window*);

 void		wsendctlmesg(Window*, int, Rectangle, void*);

 void		wsetcursor(Window*, int);

 void		wsetname(Window*);

--- a/sys/src/cmd/rio/rio.c

+++ b/sys/src/cmd/rio/rio.c

@@ -775,21 +775,7 @@

 		break;

 	case Send:

-		getsnarf();

-		wsnarf(w);

-		if(nsnarf == 0)

-			break;

-		if(w->rawing){

-			waddraw(w, snarf, nsnarf);

-			if(snarf[nsnarf-1]!='\n' && snarf[nsnarf-1]!='\004')

-				waddraw(w, L"\n", 1);

-		}else{

-			winsert(w, snarf, nsnarf, w->nr);

-			if(snarf[nsnarf-1]!='\n' && snarf[nsnarf-1]!='\004')

-				winsert(w, L"\n", 1, w->nr);

-		}

-		wsetselect(w, w->nr, w->nr);

-		wshow(w, w->nr);

+		wsend(w);

 		break;

 	case Scroll:

--- a/sys/src/cmd/rio/wind.c

+++ b/sys/src/cmd/rio/wind.c

@@ -1798,3 +1798,23 @@

 {

 	return runetobyte(w->r, w->nr, ip);

 }

+

+void

+wsend(Window *w)

+{

+	getsnarf();

+	wsnarf(w);

+	if(nsnarf == 0)

+		return;

+	if(w->rawing){

+		waddraw(w, snarf, nsnarf);

+		if(snarf[nsnarf-1]!='\n' && snarf[nsnarf-1]!='\004')

+			waddraw(w, L"\n", 1);

+	}else{

+		winsert(w, snarf, nsnarf, w->nr);

+		if(snarf[nsnarf-1]!='\n' && snarf[nsnarf-1]!='\004')

+			winsert(w, L"\n", 1, w->nr);

+	}

+	wsetselect(w, w->nr, w->nr);

+	wshow(w, w->nr);

+}