Zero buffer data in BufAlloc()

Inspired by a pattern in NoMachine's NX. Consistently zeroed buffers compress better with ssh and friends. Note that you'll need to rebuild all your protocol libraries to take advantage of this. Signed-off-by: Adam Jackson <ajax@redhat.com> Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com> Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com> Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Zero buffer data in BufAlloc()
9b5f99c3 · Adam Jackson · Ulrich Sibiller · 13fe4d47 · 9b5f99c3
Commit 9b5f99c3 authored Sep 08, 2010 by Adam Jackson Committed by Ulrich Sibiller Oct 19, 2016
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Xlibint.h nx-X11/lib/X11/Xlibint.h +1 -1

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--- a/nx-X11/lib/X11/Xlibint.h
+++ b/nx-X11/lib/X11/Xlibint.h
@@ -617,7 +617,7 @@ extern void _XFlushGCCache(Display *dpy, GC gc);
    if (dpy->bufptr + (n) > dpy->bufmax) \
        _XFlush (dpy); \
    ptr = (type) dpy->bufptr; \
-    (void)ptr; \
+    memset(ptr, '\0', n); \
    dpy->bufptr += (n);

 #define Data16(dpy, data, len) Data((dpy), (_Xconst char *)(data), (len))