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Annotation of 43BSDTahoe/new/X/Xlib/XPeekEvent.c, revision 1.1.1.1

1.1       root        1: #include <X/mit-copyright.h>
                      2: 
                      3: /* $Header: XPeekEvent.c,v 10.5 86/04/22 15:21:50 jg Rel $ */
                      4: /* Copyright    Massachusetts Institute of Technology    1985  */
                      5: 
                      6: #include "XlibInternal.h"
                      7: 
                      8: extern _QEvent *_qfree;
                      9: 
                     10: /* Flush output and (wait for and) return the next event in the queue,
                     11: *  BUT do not remove it from the queue.
                     12: */
                     13: 
                     14: XPeekEvent (event)
                     15:        register XEvent *event;
                     16: {
                     17:        register _QEvent *qelt;
                     18:        register Display *dpy = _XlibCurrentDisplay;
                     19:        
                     20:        _XFlush (dpy);
                     21:        if (qelt = dpy->head) {
                     22:            *event = qelt->event;
                     23:            return;
                     24:            }
                     25: 
                     26:        while (1) {
                     27:            _XRead (dpy, (char *)event, sizeof(XEvent));
                     28:            if (event->type == X_Error)
                     29:                _XError (dpy, (XErrorEvent *) event);
                     30:            else {  /* it's an event packet */
                     31:                _XEnq (dpy, event);
                     32:                return;
                     33:                }
                     34:        }
                     35: }
                     36: 

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