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diff --git a/Build/source/texk/xdvik/filehist.h b/Build/source/texk/xdvik/filehist.h
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+/*
+ * Copyright (c) 2004 Stefan Ulrich
+ *
+ * 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
+ * PAUL VOJTA OR ANY OTHER AUTHOR OF THIS SOFTWARE 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 FILEHIST_H_
+#define FILEHIST_H_
+
+typedef void (*filehistCallbackT) (int idx, const char *filename, int pageno, void *data);
+
+extern void file_history_enumerate(filehistCallbackT callback, void *data);
+extern void file_history_init(void);
+extern Boolean file_history_push(const char *filename);
+extern void file_history_set_page(int pageno);
+extern void file_history_set_page_at(int idx, int pageno);
+extern int file_history_get_page(void);
+extern char *file_history_get_elem(int idx, int *ret_page);
+extern char *file_history_get_list(void);
+extern void file_history_open(const char *filename);
+extern size_t file_history_size(void);
+
+#endif /* FILEHIST_H_ */
+