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+/* $Xorg: RegstFlt.c,v 1.5 2001/02/09 02:03:35 xorgcvs Exp $ */
+
+ /*
+ * Copyright 1990, 1991 by OMRON Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name OMRON not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. OMRON makes no representations
+ * about the suitability of this software for any purpose. It is provided
+ * "as is" without express or implied warranty.
+ *
+ * OMRON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL OMRON BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTUOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Seiji Kuwari OMRON Corporation
+ * kuwa@omron.co.jp
+ * kuwa%omron.co.jp@uunet.uu.net
+ */
+/*
+
+Copyright 1990, 1991, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+/* $XFree86: xc/lib/X11/RegstFlt.c,v 1.5 2003/04/13 19:22:17 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xlcint.h"
+
+static void
+_XFreeIMFilters(
+ Display *display)
+{
+ register XFilterEventList fl;
+
+ while ((fl = display->im_filters)) {
+ display->im_filters = fl->next;
+ Xfree((char *)fl);
+ }
+}
+
+/*
+ * Register a filter with the filter machinery by event mask.
+ */
+void
+_XRegisterFilterByMask(
+ Display *display,
+ Window window,
+ unsigned long event_mask,
+ Bool (*filter)(
+ Display*, Window, XEvent*, XPointer
+ ),
+ XPointer client_data)
+{
+ XFilterEventRec *rec;
+
+ rec = (XFilterEventList)Xmalloc(sizeof(XFilterEventRec));
+ if (!rec)
+ return;
+ rec->window = window;
+ rec->event_mask = event_mask;
+ rec->start_type = 0;
+ rec->end_type = 0;
+ rec->filter = filter;
+ rec->client_data = client_data;
+ LockDisplay(display);
+ rec->next = display->im_filters;
+ display->im_filters = rec;
+ display->free_funcs->im_filters = _XFreeIMFilters;
+ UnlockDisplay(display);
+}
+
+/*
+ * Register a filter with the filter machinery by type code.
+ */
+void
+_XRegisterFilterByType(
+ Display *display,
+ Window window,
+ int start_type,
+ int end_type,
+ Bool (*filter)(
+ Display*, Window, XEvent*, XPointer
+ ),
+ XPointer client_data)
+{
+ XFilterEventRec *rec;
+
+ rec = (XFilterEventList)Xmalloc(sizeof(XFilterEventRec));
+ if (!rec)
+ return;
+ rec->window = window;
+ rec->event_mask = 0;
+ rec->start_type = start_type;
+ rec->end_type = end_type;
+ rec->filter = filter;
+ rec->client_data = client_data;
+ LockDisplay(display);
+ rec->next = display->im_filters;
+ display->im_filters = rec;
+ display->free_funcs->im_filters = _XFreeIMFilters;
+ UnlockDisplay(display);
+}
+
+void
+_XUnregisterFilter(
+ Display *display,
+ Window window,
+ Bool (*filter)(
+ Display*, Window, XEvent*, XPointer
+ ),
+ XPointer client_data)
+{
+ register XFilterEventList *prev, fl;
+
+ for (prev = &display->im_filters; (fl = *prev); ) {
+ if (fl->window == window &&
+ fl->filter == filter && fl->client_data == client_data) {
+ *prev = fl->next;
+ Xfree((char *)fl);
+ } else
+ prev = &fl->next;
+ }
+}