Return to XChkMaskEvent.c CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / new / X / Xlib

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

1.1       root        1: #include <X/mit-copyright.h>
                      2: 
                      3: /* $Header: XChkMaskEvent.c,v 10.1 86/03/28 11:28:22 jg Rel $ */
                      4: /* Copyright    Massachusetts Institute of Technology    1985  */
                      5: 
                      6: #include "XlibInternal.h"
                      7: 
                      8: extern _QEvent *_qfree;
                      9: 
                     10: /* 
                     11:  * Flush output and return the next event in the queue
                     12:  * matching one of the events in the mask if there is one.
                     13:  * Return whether such an event was found.
                     14:  * Events earlier in the queue are not discarded.
                     15:  */
                     16: 
                     17: int XCheckMaskEvent (mask, event)
                     18:        int mask;               /* Selected event mask. */
                     19:        register XEvent *event; /* XEvent to be filled in. */
                     20: {
                     21:        register Display *dpy;
                     22:        register _QEvent *prev, *qelt;
                     23: 
                     24:        dpy = _XlibCurrentDisplay;
                     25:        _XFlush (dpy);
                     26:        for (prev = NULL, qelt = dpy->head;
                     27:             qelt &&  !(qelt->event.type & mask);
                     28:             qelt = (prev = qelt)->next) ;
                     29:        if (qelt) {
                     30:            *event = qelt->event;
                     31:            if (prev) {
                     32:                if ((prev->next = qelt->next) == NULL)
                     33:                    dpy->tail = prev;
                     34:            } else {
                     35:                if ((dpy->head = qelt->next) == NULL)
                     36:                    dpy->tail = NULL;
                     37:            }
                     38:            qelt->next = _qfree;
                     39:            _qfree = qelt;
                     40:            dpy->qlen--;
                     41:            return 1;
                     42:        } else return 0;
                     43: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.