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-rw-r--r--xorg-server/hw/dmx/input/dmxmap.c121
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diff --git a/xorg-server/hw/dmx/input/dmxmap.c b/xorg-server/hw/dmx/input/dmxmap.c
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+/*
+ * Copyright 2003 Red Hat Inc., Durham, North Carolina.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation on the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) 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
+ * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * 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.
+ */
+
+/*
+ * Authors:
+ * Rickard E. (Rik) Faith <faith@redhat.com>
+ */
+
+/** \file
+ *
+ * This file implements a mapping from remote XInput event types to Xdmx
+ * XInput event types.
+ *
+ * The exglobals.h file defines global server-side variables with names
+ * Device* to be integers that hold the value of the type of the
+ * server-side XInput extension event.
+ *
+ * The client-side X11/extensions/XInput.h file defines macros with THE
+ * EXACT SAME Device* names!
+ *
+ * Using those macros to extract remote server event type values from
+ * the (opaque) XDevice structure is appropriate, but makes a direct
+ * mapping to the Device* integers impossible. So we use the normalized
+ * XI_Device* names for these routines.
+ */
+
+#ifdef HAVE_DMX_CONFIG_H
+#include <dmx-config.h>
+#endif
+
+#include "dmxinputinit.h"
+#include "dmxmap.h"
+
+/** Create a mapping from \a remoteEvent to \a serverEvent. The \a
+ * remoteEvent is the type returned from the remote server. The \a
+ * serverEvent is from the XI_* list of events in
+ * include/extensions/XIproto.h. */
+void dmxMapInsert(DMXLocalInputInfoPtr dmxLocal,
+ int remoteEvent, int serverEvent)
+{
+ int hash = remoteEvent & DMX_MAP_MASK;
+ int i;
+
+ /* Return if this has already been mapped */
+ if (dmxLocal->map[hash].remote == remoteEvent
+ && dmxLocal->map[hash].server == serverEvent) return;
+
+ if (dmxLocal->map[hash].remote) {
+ dmxLocal->mapOptimize = 0;
+ for (i = 0; i < DMX_MAP_ENTRIES; i++) {
+ if (!dmxLocal->map[i].remote) {
+ dmxLocal->map[i].remote = remoteEvent;
+ dmxLocal->map[i].server = serverEvent;
+ return;
+ }
+ }
+ dmxLog(dmxWarning,
+ "Out of map entries, cannot map remove event type %d\n",
+ remoteEvent);
+ } else {
+ dmxLocal->map[hash].remote = remoteEvent;
+ dmxLocal->map[hash].server = serverEvent;
+ }
+}
+
+/** Remove all mappings there were inserted with #dmxMapInsert. */
+void dmxMapClear(DMXLocalInputInfoPtr dmxLocal)
+{
+ int i;
+
+ for (i = 0; i < DMX_MAP_ENTRIES; i++) dmxLocal->map[i].remote = 0;
+ dmxLocal->mapOptimize = 1;
+}
+
+/** Lookup a mapping for \a remoteEvent. The \a remoteEvent is the type
+ * returned from the remote server. The return value is that which was
+ * passed into #dmxMapInsert (i.e., a value from the XI_* list in
+ * include/extensions/XIproto.h). If a mapping is not available, -1 is
+ * returned. */
+int dmxMapLookup(DMXLocalInputInfoPtr dmxLocal, int remoteEvent)
+{
+ int hash = remoteEvent & DMX_MAP_MASK;
+ int serverEvent = -1;
+ int i;
+
+ if (dmxLocal->mapOptimize && dmxLocal->map[hash].remote == remoteEvent) {
+ serverEvent = dmxLocal->map[hash].server;
+ } else {
+ for (i = 0; i < DMX_MAP_ENTRIES; i++)
+ if (dmxLocal->map[i].remote == remoteEvent) {
+ serverEvent = dmxLocal->map[hash].server;
+ break;
+ }
+ }
+
+ return serverEvent;
+}