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Annotation of 43BSD/contrib/X/Xlib/XPending.c, revision 1.1.1.1

1.1       root        1: #include <X/mit-copyright.h>
                      2: 
                      3: /* $Header: XPending.c,v 10.4 86/02/01 15:37:51 tony Rel $ */
                      4: /* Copyright    Massachusetts Institute of Technology    1985  */
                      5: 
                      6: #include "XlibInternal.h"
                      7: 
                      8: /* Read in any pending events and return the number of queued events. */
                      9: 
                     10: int XPending ()
                     11: {
                     12:        register int len;
                     13:        int pend;
                     14:        char buf[BUFSIZE];
                     15:        register XRep *rep;
                     16:        register Display *dpy = _XlibCurrentDisplay;
                     17:        
                     18:        _XFlush (dpy);
                     19:        if (ioctl(dpy->fd, FIONREAD, &pend) < 0)
                     20:            _XIOError(dpy);
                     21:        if ((len = pend) < sizeof(XRep))
                     22:            return(dpy->qlen);
                     23:        else if (len > BUFSIZE)
                     24:            len = BUFSIZE;
                     25:        len /= sizeof(XRep);
                     26:        pend = len * sizeof(XRep);
                     27:        _XRead (dpy, buf, pend);
                     28:        for (rep = (XRep *) buf; len > 0; rep++, len--) {
                     29:            if (rep->code == X_Error)
                     30:                _XError(dpy, (XErrorEvent *)rep);
                     31:            else   /* must be an event packet */
                     32:                _XEnq(dpy, (XEvent *) rep);
                     33:        }
                     34:        return(dpy->qlen);
                     35: }
                     36: 

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