1 files changed, 121 insertions, 0 deletions
diff --git a/xorg-server/hw/dmx/input/dmxmap.c b/xorg-server/hw/dmx/input/dmxmap.c
new file mode 100644
index 000000000..1eccd3d28
--- /dev/null
+++ b/xorg-server/hw/dmx/input/dmxmap.c
@@ -0,0 +1,121 @@
+/*
+ * 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;
+}