source/texk/web2c/luatexdir/tex/nesting.h

   1 /* nesting.h
   2
   3    Copyright 2009 Taco Hoekwater <taco@luatex.org>
   4
   5    This file is part of LuaTeX.
   6
   7    LuaTeX is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 2 of the License, or (at your
  10    option) any later version.
  11
  12    LuaTeX is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License along
  18    with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
  19
  20
  21 #ifndef NESTING_H
  22 #  define NESTING_H
  23
  24 #  define vmode 1               /* vertical mode */
  25 #  define hmode (vmode+max_command_cmd+1)
  26                                         /* horizontal mode */
  27 #  define mmode (hmode+max_command_cmd+1)
  28                                         /* math mode */
  29
  30 extern void print_mode(int m);
  31 extern void print_in_mode(int m);
  32 extern int get_mode_id(void);
  33
  34 #  define ignore_depth -65536000        /* magic dimension value to mean `ignore me' */
  35
  36 typedef struct list_state_record_ {
  37     int mode_field;
  38     halfword head_field;
  39     halfword tail_field;
  40     halfword eTeX_aux_field;
  41     int pg_field;
  42     int ml_field;
  43     halfword prev_depth_field;
  44     halfword space_factor_field;
  45     halfword incompleat_noad_field;
  46     halfword dirs_field;
  47     int math_field;
  48     int math_style_field;
  49 } list_state_record;
  50
  51 extern list_state_record *nest;
  52 extern int nest_ptr;
  53 extern int max_nest_stack;
  54 #  define cur_list nest[nest_ptr]
  55                                 /* the ``top'' semantic state */
  56 extern int shown_mode;
  57 extern halfword save_tail;
  58
  59 extern void push_nest(void);
  60 extern void pop_nest(void);
  61 extern void initialize_nesting(void);
  62
  63 extern void tail_append(halfword p);
  64 extern halfword pop_tail(void);
  65
  66
  67 extern void show_activities(void);
  68
  69
  70 #endif