lsw

commit 0ae7a4520d111c776a2dc1136f7a4c6fcebb056d
parent 4d98d964ba18e713967c9f1e046540b254071da8
Author: Connor Lane Smith <cls@lubutu.com>
Date:   Sat, 18 Jun 2011 18:47:03 +0100

reverse list
Diffstat:
M
lsw.c
 | 
32
+++++++++++++++-----------------

1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/lsw.c b/lsw.c
@@ -5,8 +5,8 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
-static void getname(Window win, char *buf, size_t size);
-static void lsw(Window win);
+static const char *getname(Window);
+static void lsw(Window);
 
 static Atom netwmname;
 static Display *dpy;
@@ -32,37 +32,35 @@ main(int argc, char *argv[]) {
 
 void
 lsw(Window win) {
-	char buf[BUFSIZ];
-	unsigned int i, n;
-	Window *wins, dw;
+	unsigned int n;
+	Window *wins, *w, dw;
 	XWindowAttributes wa;
 
 	if(!XQueryTree(dpy, win, &dw, &dw, &wins, &n))
 		return;
-	for(i = 0; i < n; i++)
-		if(XGetWindowAttributes(dpy, wins[i], &wa)
-		&& !wa.override_redirect && wa.map_state == IsViewable) {
-			getname(wins[i], buf, sizeof buf);
-			printf("0x%07lx %s\n", wins[i], buf);
-		}
+	for(w = &wins[n-1]; w >= &wins[0]; w--)
+		if(XGetWindowAttributes(dpy, *w, &wa)
+		&& !wa.override_redirect && wa.map_state == IsViewable)
+			printf("0x%07lx %s\n", *w, getname(*w));
 	XFree(wins);
 }
 
-void
-getname(Window win, char *buf, size_t size) {
+const char *
+getname(Window win) {
+	static char buf[BUFSIZ];
 	char **list;
 	int n;
 	XTextProperty prop;
 
-	buf[0] = '\0';
 	if(!XGetTextProperty(dpy, win, &prop, netwmname) || prop.nitems == 0)
 		if(!XGetWMName(dpy, win, &prop) || prop.nitems == 0)
-			return;
+			return "";
 	if(!XmbTextPropertyToTextList(dpy, &prop, &list, &n) && n > 0) {
-		strncpy(buf, list[0], size);
+		strncpy(buf, list[0], sizeof buf);
 		XFreeStringList(list);
 	}
 	else
-		strncpy(buf, (char *)prop.value, size);
+		strncpy(buf, (char *)prop.value, sizeof buf);
 	XFree(prop.value);
+	return buf;
 }