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diff --git a/libsn/sn-xmessages.h b/libsn/sn-xmessages.h
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+/*
+ * Copyright (C) 2002 Red Hat, Inc.
+ *
+ * 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 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 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 AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ */
+
+#ifndef __LF_XMESSAGES_H__
+#define __LF_XMESSAGES_H__
+
+#include <liblf/lf-common.h>
+
+LF_BEGIN_DECLS
+
+typedef void (* LfXmessageFunc) (LfDisplay *display,
+ const char *message_type,
+ const char *message,
+ void *user_data);
+
+void lf_internal_add_xmessage_func (LfDisplay *display,
+ const char *message_type,
+ LfXmessageFunc func,
+ void *func_data,
+ LfFreeFunc free_data_func);
+void lf_internal_remove_xmessage_func (LfDisplay *display,
+ const char *message_type,
+ LfXmessageFunc func,
+ void *func_data);
+void lf_internal_broadcast_xmessage (LfDisplay *display,
+ const char *message_type,
+ const char *message);
+
+char* lf_internal_serialize_message (const char *prefix,
+ const char **property_names,
+ const char **property_values);
+lf_bool_t lf_internal_unserialize_message (const char *message,
+ char **prefix,
+ char ***property_names,
+ char ***property_values);
+
+LF_END_DECLS
+
+#endif /* __LF_XMESSAGES_H__ */