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diff --git a/Build/source/texk/web2c/luatexdir/tex/nesting.h b/Build/source/texk/web2c/luatexdir/tex/nesting.h
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+/* nesting.h
+   
+   Copyright 2009 Taco Hoekwater <taco@luatex.org>
+
+   This file is part of LuaTeX.
+
+   LuaTeX is free software; you can redistribute it and/or modify it under
+   the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 2 of the License, or (at your
+   option) any later version.
+
+   LuaTeX is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
+
+/* $Id: nesting.h 3477 2010-03-12 13:59:34Z taco $ */
+
+#ifndef NESTING_H
+#  define NESTING_H
+
+#  define vmode 1               /* vertical mode */
+#  define hmode (vmode+max_command_cmd+1)
+                                        /* horizontal mode */
+#  define mmode (hmode+max_command_cmd+1)
+                                        /* math mode */
+
+extern void print_mode(int m);
+extern void print_in_mode(int m);
+extern int get_mode_id(void);
+
+#  define ignore_depth -65536000        /* magic dimension value to mean `ignore me' */
+
+typedef struct list_state_record_ {
+    int mode_field;
+    halfword head_field;
+    halfword tail_field;
+    halfword eTeX_aux_field;
+    int pg_field;
+    int ml_field;
+    halfword prev_depth_field;
+    halfword space_factor_field;
+    halfword incompleat_noad_field;
+    halfword dirs_field;
+    int math_field;
+    int math_style_field;
+} list_state_record;
+
+extern list_state_record *nest;
+extern int nest_ptr;
+extern int max_nest_stack;
+#  define cur_list nest[nest_ptr]
+                                /* the ``top'' semantic state */
+extern int shown_mode;
+extern halfword save_tail;
+
+extern void push_nest(void);
+extern void pop_nest(void);
+extern void initialize_nesting(void);
+
+extern void tail_append(halfword p);
+extern halfword pop_tail(void);
+
+
+extern void show_activities(void);
+
+
+#endif