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+/* extensions.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: extensions.h 3261 2009-12-18 11:38:21Z taco $ */
+
+#ifndef EXTENSIONS_H
+# define EXTENSIONS_H
+
+extern alpha_file write_file[16];
+extern halfword write_file_mode[16];
+extern halfword write_file_translation[16];
+extern boolean write_open[18];
+extern scaled neg_wd;
+extern scaled pos_wd;
+extern scaled neg_ht;
+
+extern halfword write_loc;
+
+extern void do_extension(PDF pdf);
+
+/* Three extra node types carry information from |main_control|. */
+
+/*
+User defined whatsits can be inserted into node lists to pass data
+along from one lua call to anotherb without interference from the
+typesetting engine itself. Each has an id, a type, and a value. The
+type of the value depends on the |user_node_type| field.
+*/
+
+extern void new_whatsit(int s);
+extern void new_write_whatsit(int w);
+extern void scan_pdf_ext_toks(void);
+extern halfword prev_rightmost(halfword s, halfword e);
+extern int pdf_last_xform;
+extern int pdf_last_ximage;
+extern int pdf_last_ximage_pages;
+extern int pdf_last_ximage_colordepth;
+extern int pdf_last_annot;
+extern int pdf_last_link;
+extern scaledpos pdf_last_pos;
+extern halfword concat_tokens(halfword q, halfword r);
+extern int pdf_retval;
+
+extern halfword make_local_par_node(void);
+
+
+/*
+The \.{\\pagediscards} and \.{\\splitdiscards} commands share the
+command code |un_vbox| with \.{\\unvbox} and \.{\\unvcopy}, they are
+distinguished by their |chr_code| values |last_box_code| and
+|vsplit_code|. These |chr_code| values are larger than |box_code| and
+|copy_code|.
+*/
+
+extern boolean *eof_seen; /* has eof been seen? */
+extern void print_group(boolean e);
+extern void group_trace(boolean e);
+extern save_pointer *grp_stack; /* initial |cur_boundary| */
+extern halfword *if_stack; /* initial |cond_ptr| */
+extern void group_warning(void);
+extern void if_warning(void);
+extern void file_warning(void);
+
+extern halfword last_line_fill; /* the |par_fill_skip| glue node of the new paragraph */
+
+# define get_tex_dimen_register(j) dimen(j)
+# define get_tex_skip_register(j) skip(j)
+# define get_tex_count_register(j) count(j)
+# define get_tex_attribute_register(j) attribute(j)
+# define get_tex_box_register(j) box(j)
+
+extern int set_tex_dimen_register(int j, scaled v);
+extern int set_tex_skip_register(int j, halfword v);
+extern int set_tex_count_register(int j, scaled v);
+extern int set_tex_box_register(int j, scaled v);
+extern int set_tex_attribute_register(int j, scaled v);
+extern int get_tex_toks_register(int l);
+extern int set_tex_toks_register(int j, lstring s);
+extern scaled get_tex_box_width(int j);
+extern int set_tex_box_width(int j, scaled v);
+extern scaled get_tex_box_height(int j);
+extern int set_tex_box_height(int j, scaled v);
+extern scaled get_tex_box_depth(int j);
+extern int set_tex_box_depth(int j, scaled v);
+
+/* Synctex variables */
+
+extern int synctexoption;
+extern int synctexoffset;
+
+/* Here are extra variables for Web2c. */
+
+extern pool_pointer edit_name_start;
+extern int edit_name_length, edit_line;
+extern int ipcon;
+extern boolean stop_at_space;
+extern int shellenabledp;
+extern int restrictedshell;
+extern char *output_comment;
+extern boolean debug_format_file;
+
+#endif