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+/* nodes.h
+
+ Copyright 2006-2008 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: texnodes.h 3552 2010-03-26 15:30:08Z taco $ */
+
+#include <stdarg.h>
+
+#ifndef __NODES_H__
+# define __NODES_H__
+
+/* these are in texlang.c */
+
+# define set_vlink(a,b) vlink(a)=b
+# define get_vlink(a) vlink(a)
+# define get_character(a) character(a)
+
+extern halfword insert_discretionary(halfword t, halfword pre, halfword post,
+ halfword replace);
+extern halfword insert_syllable_discretionary(halfword t, lang_variables * lan);
+extern halfword insert_word_discretionary(halfword t, lang_variables * lan);
+extern halfword insert_complex_discretionary(halfword t, lang_variables * lan,
+ halfword pre, halfword post,
+ halfword replace);
+extern halfword insert_character(halfword t, int n);
+extern void set_disc_field(halfword f, halfword t);
+
+# define varmemcast(a) (memory_word *)(a)
+extern memory_word *volatile varmem;
+extern halfword var_mem_max;
+
+extern halfword get_node(int s);
+extern void free_node(halfword p, int s);
+extern void init_node_mem(int s);
+extern void dump_node_mem(void);
+extern void undump_node_mem(void);
+
+
+# define max_halfword 0x3FFFFFFF
+# define max_dimen 0x3FFFFFFF
+# ifndef null
+# define null 0
+# endif
+# define null_flag -0x40000000
+# define zero_glue 0
+# define normal 0
+
+# define vinfo(a) varmem[(a)].hh.v.LH
+# define vlink(a) varmem[(a)].hh.v.RH
+# define type(a) varmem[(a)].hh.u.B0
+# define subtype(a) varmem[(a)].hh.u.B1
+# define node_attr(a) vinfo((a)+1)
+# define alink(a) vlink((a)+1)
+
+# define node_size(a) varmem[(a)].hh.v.LH
+
+# define rlink(a) vlink((a)+1)
+ /* aka alink() */
+# define llink(a) vinfo((a)+1)
+ /* overlaps with node_attr() */
+
+# define add_glue_ref(a) glue_ref_count(a)++ /* new reference to a glue spec */
+
+/* really special head node pointers that only need links */
+
+# define temp_node_size 2
+
+/* attribute lists */
+
+# define UNUSED_ATTRIBUTE -0x7FFFFFFF /* as low as it goes */
+
+/* it is convenient to have attribute list nodes and attribute node
+ * be the same size
+ */
+
+# define attribute_node_size 2
+
+# define attr_list_ref(a) vinfo((a)+1)
+ /* the reference count */
+# define attribute_id(a) vinfo((a)+1)
+# define attribute_value(a) vlink((a)+1)
+
+# define cache_disabled max_halfword
+# define add_node_attr_ref(a) { if (a!=null) attr_list_ref((a))++; }
+
+# define replace_attribute_list(a,b) do { \
+ delete_attribute_ref(node_attr(a)); \
+ node_attr(a)=b; \
+ } while (0)
+
+extern void update_attribute_cache(void);
+extern halfword copy_attribute_list(halfword n);
+extern halfword do_set_attribute(halfword p, int i, int val);
+
+
+/* a glue spec */
+# define glue_spec_size 4
+# define stretch(a) vlink((a)+1)
+/* width == a+2 */
+# define shrink(a) vinfo((a)+1)
+# define stretch_order(a) type((a)+3)
+# define shrink_order(a) subtype((a)+3)
+# define glue_ref_count(a) vlink((a)+3)
+
+# define width_offset 2
+# define depth_offset 3
+# define height_offset 4
+# define list_offset 6
+
+typedef enum {
+ cond_math_glue = 98, /* special |subtype| to suppress glue in the next node */
+ mu_glue, /* |subtype| for math glue */
+ a_leaders, /* |subtype| for aligned leaders */
+ c_leaders, /* |subtype| for centered leaders */
+ x_leaders, /* |subtype| for expanded leaders */
+ g_leaders /* |subtype| for global (page) leaders */
+} glue_subtype_codes;
+
+/* normal nodes */
+
+# define inf_bad 10000 /* infinitely bad value */
+# define inf_penalty inf_bad /*``infinite'' penalty value */
+# define eject_penalty -(inf_penalty) /*``negatively infinite'' penalty value */
+
+# define penalty_node_size 3
+# define penalty(a) vlink((a)+2)
+
+# define glue_node_size 4
+# define glue_ptr(a) vinfo((a)+2)
+# define leader_ptr(a) vlink((a)+2)
+# define synctex_tag_glue(a) vinfo((a)+3)
+# define synctex_line_glue(a) vlink((a)+3)
+
+/* disc nodes could eventually be smaller, because the indirect
+ pointers are not really needed (8 instead of 10).
+ */
+
+# define disc_node_size 10
+
+typedef enum {
+ discretionary_disc = 0,
+ explicit_disc,
+ automatic_disc,
+ syllable_disc,
+ init_disc, /* first of a duo of syllable_discs */
+ select_disc, /* second of a duo of syllable_discs */
+} discretionary_types;
+
+# define pre_break_head(a) ((a)+4)
+# define post_break_head(a) ((a)+6)
+# define no_break_head(a) ((a)+8)
+
+# define pre_break(a) vinfo((a)+2)
+# define post_break(a) vlink((a)+2)
+# define no_break(a) vlink((a)+3)
+# define tlink llink
+
+# define vlink_pre_break(a) vlink(pre_break_head(a))
+# define vlink_post_break(a) vlink(post_break_head(a))
+# define vlink_no_break(a) vlink(no_break_head(a))
+
+# define tlink_pre_break(a) tlink(pre_break_head(a))
+# define tlink_post_break(a) tlink(post_break_head(a))
+# define tlink_no_break(a) tlink(no_break_head(a))
+
+# define kern_node_size 5
+# define explicit 1 /*|subtype| of kern nodes from \.{\\kern} and \.{\\/} */
+# define acc_kern 2 /*|subtype| of kern nodes from accents */
+# define synctex_tag_kern(a) vinfo((a)+3)
+# define synctex_line_kern(a) vlink((a)+3)
+# define ex_kern(a) vinfo((a)+4) /* expansion factor (hz) */
+
+# define box_node_size 9
+
+# define HLIST_SUBTYPE_UNKNOWN 0
+# define HLIST_SUBTYPE_LINE 1
+# define HLIST_SUBTYPE_HBOX 2
+
+# define width(a) varmem[(a)+2].cint
+# define depth(a) varmem[(a)+3].cint
+# define height(a) varmem[(a)+4].cint
+# define shift_amount(a) vlink((a)+5)
+# define box_dir(a) vinfo((a)+5)
+# define list_ptr(a) vlink((a)+6)
+# define glue_order(a) subtype((a)+6)
+# define glue_sign(a) type((a)+6)
+# define glue_set(a) varmem[(a)+7].gr
+# define synctex_tag_box(a) vinfo((a)+8)
+# define synctex_line_box(a) vlink((a)+8)
+
+
+/* unset nodes */
+# define glue_stretch(a) varmem[(a)+7].cint
+# define glue_shrink shift_amount
+# define span_count subtype
+
+# define rule_node_size 7
+# define rule_dir(a) vlink((a)+5)
+# define synctex_tag_rule(a) vinfo((a)+6)
+# define synctex_line_rule(a) vlink((a)+6)
+
+# define mark_node_size 3
+# define mark_ptr(a) vlink((a)+2)
+# define mark_class(a) vinfo((a)+2)
+
+# define adjust_node_size 3
+# define adjust_pre subtype
+# define adjust_ptr(a) vlink(a+2)
+
+# define glyph_node_size 6
+
+# define character(a) vinfo((a)+2)
+# define font(a) vlink((a)+2)
+# define lang_data(a) vinfo((a)+3)
+# define lig_ptr(a) vlink((a)+3)
+# define x_displace(a) vinfo((a)+4)
+# define y_displace(a) vlink((a)+4)
+# define ex_glyph(a) vinfo((a)+5) /* expansion factor (hz) */
+# define is_char_node(a) (a!=null && type(a)==glyph_node)
+
+# define char_lang(a) ((const int)(signed short)(((signed int)((unsigned)lang_data(a)&0x7FFF0000)<<1)>>17))
+# define char_lhmin(a) ((const int)(((unsigned)lang_data(a) & 0x0000FF00)>>8))
+# define char_rhmin(a) ((const int)(((unsigned)lang_data(a) & 0x000000FF)))
+# define char_uchyph(a) ((const int)(((unsigned)lang_data(a) & 0x80000000)>>31))
+
+# define make_lang_data(a,b,c,d) (a>0 ? (1<<31): 0)+ \
+ (b<<16)+ (((c>0 && c<256) ? c : 255)<<8)+(((d>0 && d<256) ? d : 255))
+
+# define init_lang_data(a) lang_data(a)=256+1
+
+# define set_char_lang(a,b) lang_data(a)=make_lang_data(char_uchyph(a),b,char_lhmin(a),char_rhmin(a))
+# define set_char_lhmin(a,b) lang_data(a)=make_lang_data(char_uchyph(a),char_lang(a),b,char_rhmin(a))
+# define set_char_rhmin(a,b) lang_data(a)=make_lang_data(char_uchyph(a),char_lang(a),char_lhmin(a),b)
+# define set_char_uchyph(a,b) lang_data(a)=make_lang_data(b,char_lang(a),char_lhmin(a),char_rhmin(a))
+
+# define margin_kern_node_size 4
+# define margin_char(a) vlink((a)+3)
+
+/*@# {|subtype| of marginal kerns}*/
+# define left_side 0
+# define right_side 1
+
+# define math_node_size 4
+# define surround(a) vlink((a)+2)
+# define before 0 /*|subtype| for math node that introduces a formula */
+# define after 1 /*|subtype| for math node that winds up a formula */
+# define synctex_tag_math(a) vinfo((a)+3)
+# define synctex_line_math(a) vlink((a)+3)
+
+# define ins_node_size 6
+# define float_cost(a) varmem[(a)+2].cint
+# define ins_ptr(a) vinfo((a)+5)
+# define split_top_ptr(a) vlink((a)+5)
+
+
+# define page_ins_node_size 5
+
+/* height = 4 */
+
+typedef enum {
+ hlist_node = 0,
+ vlist_node = 1,
+ rule_node,
+ ins_node,
+ mark_node,
+ adjust_node,
+ /* 6 used to be ligatures */
+ disc_node = 7,
+ whatsit_node,
+ math_node,
+ glue_node, /* 10 */
+ kern_node,
+ penalty_node,
+ unset_node,
+ style_node,
+ choice_node, /* 15 */
+ simple_noad,
+ old_op_noad,
+ old_bin_noad,
+ old_rel_noad,
+ old_open_noad, /* 20 */
+ old_close_noad,
+ old_punct_noad,
+ old_inner_noad,
+ radical_noad,
+ fraction_noad, /* 25 */
+ old_under_noad,
+ old_over_noad,
+ accent_noad,
+ old_vcenter_noad,
+ fence_noad, /* 30 */
+ math_char_node, /* kernel fields */
+ sub_box_node,
+ sub_mlist_node,
+ math_text_char_node,
+ delim_node, /* shield fields */
+ margin_kern_node,
+ glyph_node,
+ align_record_node,
+ pseudo_file_node,
+ pseudo_line_node, /* 40 */
+ inserting_node,
+ split_up_node,
+ expr_node,
+ nesting_node,
+ span_node, /* 45 */
+ attribute_node,
+ glue_spec_node,
+ attribute_list_node,
+ action_node,
+ temp_node, /* 50 */
+ align_stack_node,
+ movement_node,
+ if_node,
+ unhyphenated_node,
+ hyphenated_node, /* 55 */
+ delta_node,
+ passive_node,
+ shape_node,
+} node_types;
+
+# define MAX_NODE_TYPE 58
+
+# define last_known_node temp_node /* used by \lastnodetype */
+
+# define movement_node_size 3
+# define expr_node_size 3
+# define if_node_size 2
+# define align_stack_node_size 6
+# define nesting_node_size 2
+
+# define span_node_size 3
+# define span_span(a) vlink((a)+1)
+# define span_link(a) vinfo((a)+1)
+
+# define pseudo_file_node_size 2
+# define pseudo_lines(a) vlink((a)+1)
+
+# define nodetype_has_attributes(t) (((t)<=glyph_node) && ((t)!=unset_node))
+
+/* style and choice nodes */
+/* style nodes can be smaller, the information is encoded in |subtype|,
+ but choice nodes are on-the-spot converted to style nodes */
+
+# define style_node_size 4 /* number of words in a style node */
+
+# define display_mlist(a) vinfo((a)+2) /* mlist to be used in display style */
+# define text_mlist(a) vlink((a)+2) /* mlist to be used in text style */
+# define script_mlist(a) vinfo((a)+3) /* mlist to be used in script style */
+# define script_script_mlist(a) vlink((a)+3) /* mlist to be used in scriptscript style */
+
+/* regular noads */
+
+# define noad_size 4 /* number of words in a normal noad */
+# define new_hlist(a) vlink((a)+2) /* the translation of an mlist */
+# define nucleus(a) vinfo((a)+2) /* the |nucleus| field of a noad */
+# define supscr(a) vlink((a)+3) /* the |supscr| field of a noad */
+# define subscr(a) vinfo((a)+3) /* the |subscr| field of a noad */
+
+/* accent noads */
+/* like a regular noad, but with two extra fields. */
+
+# define accent_noad_size 5 /*number of |mem| words in an accent noad */
+# define accent_chr(a) vinfo((a)+4) /* the |accent_chr| field of an accent noad */
+# define bot_accent_chr(a) vlink((a)+4) /* the |bot_accent_chr| field of an accent noad */
+
+/* left and right noads */
+
+# define fence_noad_size 3
+# define delimiter(a) vlink((a)+2) /* |delimiter| field in left and right noads */
+
+/* subtype of fence noads */
+
+# define left_noad_side 1
+# define middle_noad_side 2
+# define right_noad_side 3
+
+/* fraction noads */
+
+# define fraction_noad_size 5 /*number of |mem| words in a fraction noad */
+# define thickness(a) vlink((a)+2) /* |thickness| field in a fraction noad */
+# define numerator(a) vlink((a)+3) /*|numerator| field in a fraction noad */
+# define denominator(a) vinfo((a)+3) /*|denominator| field in a fraction noad */
+# define left_delimiter(a) vlink((a)+4) /* first delimiter field of a noad */
+# define right_delimiter(a) vinfo((a)+4) /* second delimiter field of a fraction noad */
+
+/* radical noads */
+/* this is like a fraction, but it only stores a |left_delimiter| */
+# define radical_noad_size 5 /*number of |mem| words in a radical noad */
+
+# define degree(a) vinfo((a)+4) /* the root degree in a radical noad */
+
+# define math_kernel_node_size 3
+
+/* accessors for the |nucleus|-style node fields */
+# define math_fam(a) vinfo((a)+2)
+# define math_character(a) vlink((a)+2)
+# define math_list(a) vlink((a)+2)
+
+/* accessors for the |delimiter|-style two-word subnode fields */
+
+# define math_shield_node_size 4
+ /* not used yet */
+
+# define small_fam(A) vinfo((A)+2) /* |fam| for ``small'' delimiter */
+# define small_char(A) vlink((A)+2) /* |character| for ``small'' delimiter */
+# define large_fam(A) vinfo((A)+3) /* |fam| for ``large'' delimiter */
+# define large_char(A) vlink((A)+3) /* |character| for ``large'' delimiter */
+
+typedef enum {
+ open_node = 0,
+ write_node,
+ close_node,
+ special_node,
+ language_node,
+ set_language_code,
+ local_par_node,
+ dir_node,
+ pdf_literal_node,
+ pdf_obj_code,
+ pdf_refobj_node, /* 10 */
+ pdf_xform_code,
+ pdf_refxform_node,
+ pdf_ximage_code,
+ pdf_refximage_node,
+ pdf_annot_node,
+ pdf_start_link_node,
+ pdf_end_link_node,
+ pdf_outline_code,
+ pdf_dest_node,
+ pdf_thread_node, /* 20 */
+ pdf_start_thread_node,
+ pdf_end_thread_node,
+ pdf_save_pos_node,
+ pdf_thread_data_node,
+ pdf_link_data_node,
+ pdf_names_code,
+ pdf_font_attr_code,
+ pdf_include_chars_code,
+ pdf_map_file_code,
+ pdf_map_line_code, /* 30 */
+ pdf_trailer_code,
+ pdf_font_expand_code,
+ set_random_seed_code,
+ pdf_glyph_to_unicode_code,
+ late_lua_node, /* 35 */
+ close_lua_node,
+ save_cat_code_table_code,
+ init_cat_code_table_code,
+ pdf_colorstack_node,
+ pdf_setmatrix_node, /* 40 */
+ pdf_save_node,
+ pdf_restore_node,
+ cancel_boundary_node,
+ user_defined_node /* 44 */
+} whatsit_types;
+
+# define MAX_WHATSIT_TYPE 44
+
+# define get_node_size(i,j) (i!=whatsit_node ? node_data[i].size : whatsit_node_data[j].size)
+# define get_node_name(i,j) (i!=whatsit_node ? node_data[i].name : whatsit_node_data[j].name)
+
+
+# define pdf_info_code pdf_thread_data_node
+# define pdf_catalog_code pdf_link_data_node
+
+# define GLYPH_CHARACTER (1 << 0)
+# define GLYPH_LIGATURE (1 << 1)
+# define GLYPH_GHOST (1 << 2)
+# define GLYPH_LEFT (1 << 3)
+# define GLYPH_RIGHT (1 << 4)
+
+# define is_character(p) ((subtype(p)) & GLYPH_CHARACTER)
+# define is_ligature(p) ((subtype(p)) & GLYPH_LIGATURE )
+# define is_ghost(p) ((subtype(p)) & GLYPH_GHOST )
+
+# define is_simple_character(p) (is_character(p) && !is_ligature(p) && !is_ghost(p))
+
+# define is_leftboundary(p) (is_ligature(p) && ((subtype(p)) & GLYPH_LEFT ))
+# define is_rightboundary(p) (is_ligature(p) && ((subtype(p)) & GLYPH_RIGHT ))
+# define is_leftghost(p) (is_ghost(p) && ((subtype(p)) & GLYPH_LEFT ))
+# define is_rightghost(p) (is_ghost(p) && ((subtype(p)) & GLYPH_RIGHT ))
+
+# define set_is_glyph(p) subtype(p) = (quarterword) (subtype(p) & ~GLYPH_CHARACTER)
+# define set_is_character(p) subtype(p) = (quarterword) (subtype(p) | GLYPH_CHARACTER)
+# define set_is_ligature(p) subtype(p) = (quarterword) (subtype(p) | GLYPH_LIGATURE)
+# define set_is_ghost(p) subtype(p) = (quarterword) (subtype(p) |GLYPH_GHOST)
+
+# define set_to_glyph(p) subtype(p) = (quarterword)(subtype(p) & 0xFF00)
+# define set_to_character(p) subtype(p) = (quarterword)((subtype(p) & 0xFF00) | GLYPH_CHARACTER)
+# define set_to_ligature(p) subtype(p) = (quarterword)((subtype(p) & 0xFF00) | GLYPH_LIGATURE)
+# define set_to_ghost(p) subtype(p) = (quarterword)((subtype(p) & 0xFF00) | GLYPH_GHOST)
+
+# define set_is_leftboundary(p) { set_to_ligature(p); subtype(p) |= GLYPH_LEFT; }
+# define set_is_rightboundary(p) { set_to_ligature(p); subtype(p) |= GLYPH_RIGHT; }
+# define set_is_leftghost(p) { set_to_ghost(p); subtype(p) |= GLYPH_LEFT; }
+# define set_is_rightghost(p) { set_to_ghost(p); subtype(p) |= GLYPH_RIGHT; }
+
+
+# define special_node_size 3
+
+# define dir_node_size 6
+# define dir_dir(a) vinfo((a)+2)
+# define dir_level(a) vlink((a)+2)
+# define dir_dvi_ptr(a) vinfo((a)+3)
+# define dir_dvi_h(a) vlink((a)+3) /* obsolete */
+# define dir_refpos_h(a) vinfo((a)+4)
+# define dir_refpos_v(a) vlink((a)+4)
+# define dir_cur_h(a) vinfo((a)+5)
+# define dir_cur_v(a) vlink((a)+5)
+
+# define write_node_size 3
+# define close_node_size 3
+# define write_tokens(a) vlink(a+2)
+# define write_stream(a) vinfo(a+2)
+
+# define open_node_size 4
+# define open_name(a) vlink((a)+2)
+# define open_area(a) vinfo((a)+3)
+# define open_ext(a) vlink((a)+3)
+
+# define late_lua_node_size 4
+# define late_lua_data(a) vlink((a)+2)
+# define late_lua_reg(a) vinfo((a)+2)
+# define late_lua_name(a) vlink((a)+3)
+
+# define local_par_size 6
+
+# define local_pen_inter(a) vinfo((a)+2)
+# define local_pen_broken(a) vlink((a)+2)
+# define local_box_left(a) vlink((a)+3)
+# define local_box_left_width(a) vinfo((a)+3)
+# define local_box_right(a) vlink((a)+4)
+# define local_box_right_width(a) vinfo((a)+4)
+# define local_par_dir(a) vinfo((a)+5)
+
+
+/* type of literal data */
+# define lua_refid_literal 1 /* not a |normal| string */
+
+/* literal ctm types */
+
+typedef enum {
+ set_origin = 0,
+ direct_page,
+ direct_always,
+ scan_special,
+} ctm_transform_modes;
+
+
+# define pdf_refobj_node_size 3
+
+# define pdf_obj_objnum(a) vinfo((a) + 2)
+
+# define pdf_refxform_node_size 6
+# define pdf_refximage_node_size 6
+# define pdf_annot_node_size 8
+# define pdf_dest_node_size 8
+# define pdf_thread_node_size 8
+
+/*
+when a whatsit node representing annotation is created, words |1..3| are
+width, height and depth of this annotation; after shipping out words |1..4|
+are rectangle specification of annotation. For whatsit node representing
+destination |pdf_ann_left| and |pdf_ann_top| are used for some types of destinations
+*/
+
+/* coordinates of destinations/threads/annotations (in whatsit node) */
+# define pdf_ann_left(a) varmem[(a) + 2].cint
+# define pdf_ann_top(a) varmem[(a) + 3].cint
+# define pdf_ann_right(a) varmem[(a) + 4].cint
+# define pdf_ann_bottom(a) varmem[(a) + 5].cint
+
+# define pdf_literal_data(a) vlink((a)+2)
+# define pdf_literal_mode(a) type((a)+2)
+# define pdf_literal_type(a) subtype((a)+2)
+
+# define pdf_ximage_index(a) vinfo((a) + 5) /* /Im* number and image index in array */
+# define pdf_ximage_transform(a) vlink((a) + 5)
+# define pdf_xform_objnum(a) vinfo((a) + 5)
+# define pdf_xform_transform(a) vlink((a) + 5)
+
+# define pdf_annot_data(a) vinfo((a) + 6)
+# define pdf_link_attr(a) vinfo((a) + 6)
+# define pdf_link_action(a) vlink((a) + 6)
+# define pdf_annot_objnum(a) varmem[(a) + 7].cint
+# define pdf_link_objnum(a) varmem[(a) + 7].cint
+
+# define pdf_dest_type(a) type((a) + 6)
+# define pdf_dest_named_id(a) subtype((a) + 6)
+# define pdf_dest_id(a) vlink((a) + 6)
+# define pdf_dest_xyz_zoom(a) vinfo((a) + 7)
+# define pdf_dest_objnum(a) vlink((a) + 7)
+
+# define pdf_thread_named_id(a) subtype((a) + 6)
+# define pdf_thread_id(a) vlink((a) + 6)
+# define pdf_thread_attr(a) vinfo((a) + 7)
+
+# define pdf_end_link_node_size 3
+# define pdf_end_thread_node_size 3
+# define pdf_save_pos_node_size 3
+
+# define pdf_colorstack_node_size 4
+# define pdf_setmatrix_node_size 3
+
+# define pdf_colorstack_stack(a) vlink((a)+2)
+# define pdf_colorstack_cmd(a) vinfo((a)+2)
+# define pdf_colorstack_data(a) vlink((a)+3)
+# define pdf_setmatrix_data(a) vlink((a)+2)
+
+# define pdf_save_node_size 3
+# define pdf_restore_node_size 3
+
+typedef enum {
+ colorstack_set = 0,
+ colorstack_push,
+ colorstack_pop,
+ colorstack_current
+} colorstack_commands;
+
+# define colorstack_data colorstack_push /* last value where data field is set */
+
+# define user_defined_node_size 4
+# define user_node_type(a) vinfo((a)+2)
+# define user_node_id(a) vlink((a)+2)
+# define user_node_value(a) vinfo((a)+3)
+
+# define cancel_boundary_size 3
+
+# define active_node_size 4 /*number of words in extended active nodes */
+# define fitness subtype /*|very_loose_fit..tight_fit| on final line for this break */
+# define break_node(a) vlink((a)+1) /*pointer to the corresponding passive node */
+# define line_number(a) vinfo((a)+1) /*line that begins at this breakpoint */
+# define total_demerits(a) varmem[(a)+2].cint /* the quantity that \TeX\ minimizes */
+# define active_short(a) vinfo(a+3) /* |shortfall| of this line */
+# define active_glue(a) vlink(a+3) /*corresponding glue stretch or shrink */
+
+# define passive_node_size 7
+# define cur_break(a) vlink((a)+1) /*in passive node, points to position of this breakpoint */
+# define prev_break(a) vinfo((a)+1) /*points to passive node that should precede this one */
+# define passive_pen_inter(a) vinfo((a)+2)
+# define passive_pen_broken(a) vlink((a)+2)
+# define passive_left_box(a) vlink((a)+3)
+# define passive_left_box_width(a) vinfo((a)+3)
+# define passive_last_left_box(a) vlink((a)+4)
+# define passive_last_left_box_width(a) vinfo((a)+4)
+# define passive_right_box(a) vlink((a)+5)
+# define passive_right_box_width(a) vinfo((a)+5)
+# define serial(a) vlink((a)+6) /* serial number for symbolic identification */
+
+# define delta_node_size 10 /* 8 fields, stored in a+1..9 */
+
+# define couple_nodes(a,b) {assert(b!=null);vlink(a)=b;alink(b)=a;}
+# define try_couple_nodes(a,b) if (b==null) vlink(a)=b; else {couple_nodes(a,b);}
+# define uncouple_node(a) {assert(a!=null);vlink(a)=null;alink(a)=null;}
+
+# define cache_disabled max_halfword
+
+extern void delete_attribute_ref(halfword b);
+extern void build_attribute_list(halfword b);
+
+extern int unset_attribute(halfword n, int c, int w);
+extern void set_attribute(halfword n, int c, int w);
+extern int has_attribute(halfword n, int c, int w);
+
+extern halfword new_span_node(halfword n, int c, scaled w);
+
+extern void print_short_node_contents(halfword n);
+extern void show_node_list(int i);
+extern pointer actual_box_width(pointer r, scaled base_width);
+
+/* TH: these two defines still need checking. The node ordering in luatex is not
+ quite the same as in tex82 */
+
+# define precedes_break(a) (type((a))<math_node && (type(a)!=whatsit_node || subtype(a)!=dir_node))
+# define non_discardable(a) (type((a))<math_node)
+
+/* from luanode.c */
+
+typedef struct _node_info {
+ int id;
+ int size;
+ const char **fields;
+ const char *name;
+} node_info;
+
+extern node_info node_data[];
+extern node_info whatsit_node_data[];
+extern halfword new_node(int i, int j);
+extern void flush_node_list(halfword);
+extern void flush_node(halfword);
+extern halfword do_copy_node_list(halfword, halfword);
+extern halfword copy_node_list(halfword);
+extern halfword copy_node(const halfword);
+extern void check_node(halfword);
+extern void check_node_mem(void);
+extern void fix_node_list(halfword);
+extern int fix_node_lists;
+extern char *sprint_node_mem_usage(void);
+extern halfword raw_glyph_node(void);
+extern halfword new_glyph_node(void);
+extern int valid_node(halfword);
+
+typedef enum {
+ normal_g = 0,
+ sfi,
+ fil,
+ fill,
+ filll
+} glue_orders;
+
+# define zero_glue 0
+# define sfi_glue zero_glue+glue_spec_size
+# define fil_glue sfi_glue+glue_spec_size
+# define fill_glue fil_glue+glue_spec_size
+# define ss_glue fill_glue+glue_spec_size
+# define fil_neg_glue ss_glue+glue_spec_size
+# define page_ins_head fil_neg_glue+glue_spec_size
+# define contrib_head page_ins_head+temp_node_size
+# define page_head contrib_head+temp_node_size
+# define temp_head page_head+temp_node_size
+# define hold_head temp_head+temp_node_size
+# define adjust_head hold_head+temp_node_size
+# define pre_adjust_head adjust_head+temp_node_size
+# define active pre_adjust_head+temp_node_size
+# define align_head active+active_node_size
+# define end_span align_head+temp_node_size
+# define begin_point end_span+span_node_size
+# define end_point begin_point+glyph_node_size
+# define var_mem_stat_max (end_point+glyph_node_size-1)
+
+# define stretching 1
+# define shrinking 2
+
+# define is_running(A) ((A)==null_flag) /* tests for a running dimension */
+
+extern halfword tail_of_list(halfword p);
+extern void delete_glue_ref(halfword p);
+
+extern int var_used;
+extern halfword temp_ptr;
+
+# define cache_disabled max_halfword
+
+extern int max_used_attr;
+extern halfword attr_list_cache;
+
+extern halfword new_null_box(void);
+extern halfword new_rule(void);
+extern halfword new_glyph(int f, int c);
+extern quarterword norm_min(int h);
+extern halfword new_char(int f, int c);
+extern scaled glyph_width(halfword p);
+extern scaled glyph_height(halfword p);
+extern scaled glyph_depth(halfword p);
+extern halfword new_disc(void);
+extern halfword new_math(scaled w, int s);
+extern halfword new_spec(halfword p);
+extern halfword new_param_glue(int n);
+extern halfword new_glue(halfword q);
+extern halfword new_skip_param(int n);
+extern halfword new_kern(scaled w);
+extern halfword new_penalty(int m);
+
+#endif