preliminary e-pTeX

git-svn-id: svn://tug.org/texlive/trunk@21042 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 6832 insertions, 0 deletions

diff --git a/Build/source/texk/web2c/eptexdir/eptex-base.ch b/Build/source/texk/web2c/eptexdir/eptex-base.ch
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+% This is a change file for e-pTeX,
+% essentialy same for that of e-pTeX 090309.
+% Based on change file for 
+%   pTeX 3.1.10 (by Sadayuki Tanaka (sada-t@ascii.co.jp),
+%                   Ken Nakano (ken-na@ascii.co.jp) and ASCII Corporation).
+% e-pTeX is developed by Hironori Kitagawa.
+%
+% Thanks for:
+%   Noriyuki Abe, Akira Kakuto, Takuji Tanaka, Takayuki Yato,
+%   Yusuke Kuroki.
+%
+% compile:
+% etex.web  := tex.web + etexdir/etex.ch + etexdir/etex.fix
+% etex.ch   := etexdir/tex.ch0 + tex.ch  + etexdir/tex.ch1 
+%              + etexdir/tex.ech + etexdir/etex-binpool.ch
+% eptex.web := eptex-base.ch + eptexdir/ptex-include.ch + eptexdir/fp.ch
+%  ^^^^^^^  please tangle eptex.web.
+%
+% ---------- pTeX history ----------
+% (??/??/87) RKS jTeX 2.9 -- j1.0
+% (??/??/89) RKS jTeX 2.93 -- j1.3
+% (12/ 9/89) H_2 pTeX 2.93 j1.3 p1.0.1
+% (12/??/89) RKS jTeX 2.95 -- j1.5
+% (12/??/89) RKS jTeX 2.99 -- j1.5
+% (02/02/90) RKS jTeX 2.99 -- j1.6
+% (04/16/90) H_2 pTeX 2.99 j1.6 p1.0.3
+% (09/14/90) H_2 pTeX 2.99 j1.6 p1.0.9 -- pre-release
+% (10/29/90) H_2 Bug fix (p1.0.9a)
+% (01/21/92) H_2 jTeX 2.99 - j1.7
+% (01/21/92) H_2 pTeX 2.99 j1.7 p1.0.9F
+% (03/09/92) H_2 pTeX 2.99 j1.7 p1.0.9G jflag BUG
+% (03/20/95) KN  pTeX p2.0 (based on 3.1415)
+% (09/08/95) KN  pTeX p2.1
+% (09/20/95) KN  pTeX p2.1.1
+% (11/21/95) KN  pTeX p2.1.4
+% (08/27/97) KN  pTeX p2.1.5 (based on 3.14159)
+% (02/26/98) KN  pTeX p2.1.6
+% (03/19/98) KN  pTeX p2.1.7
+% (03/26/98) KN  pTeX p2.1.8 (Web2c 7.2)
+% (02/21/2000) KN  pTeX p2.1.9 (Web2c 7.3.1)
+% (11/13/2000) KN  pTeX p2.1.10
+% (05/22/2001) KN  pTeX p2.1.11
+% (03/10/2001) KN  pTeX p3.0 (modified BSD licence)
+% (09/02/2004) ST  pTeX p3.1.4
+% (11/29/2004) KN  pTeX p3.1.5
+% (12/13/2004) KN  pTeX p3.1.8
+% (10/17/2005) ST  pTeX p3.1.9
+% (07/18/2006) ST  pTeX p3.1.10
+% (08/17/2009) ST  pTeX p3.1.11
+% (05/23/2010) AK  Bug fix by Hironori Kitagawa.
+% (31/12/2010) AK  Bug fix and accent Kanji by Hironori Kitagawa.
+%
+@x [1.2] l.200 - pTeX:
+@d banner==TeX_banner
+@d banner_k==TeX_banner_k
+@y
+@d pTeX_version_string=='-p3.1.11' {current p\TeX\ version}
+@#
+@d pTeX_banner_k=='This is pTeXk, Version 3.1415926',pTeX_version_string
+@d pTeX_banner=='This is pTeX, Version 3.1415926',pTeX_version_string
+  {printed when p\TeX\ starts}
+@#
+@d banner==pTeX_banner
+@d banner_k==pTeX_banner_k
+@z
+
+@x [2.??] l.586 - pTeX:
+@!ASCII_code=0..255; {eight-bit numbers}
+@y
+@!ASCII_code=0..255; {eight-bit numbers}
+@!KANJI_code=0..65535; {sixteen-bit numbers}
+@z
+
+@x [4.??] l.870 - pTeX:
+@!eight_bits=0..255; {unsigned one-byte quantity}
+@y
+@!eight_bits=0..255; {unsigned one-byte quantity}
+@!sixteen_bits=0..65535; {unsigned two-bytes quantity}
+@z
+
+@x [3.??] l.891 - pTeX:
+@ All of the file opening functions are defined in C.
+@y
+@ All of the file opening functions are defined in C.
+
+@ Kanji code handling.
+@z
+
+@x [4.47] l.1325 - pTeX:
+@!init function get_strings_started:boolean; {initializes the string pool,
+  but returns |false| if something goes wrong}
+label done,exit;
+var k,@!l:0..255; {small indices or counters}
+@y
+@!init function get_strings_started:boolean; {initializes the string pool,
+  but returns |false| if something goes wrong}
+label done,exit;
+var k,@!l:KANJI_code; {small indices or counters}
+@z
+
+@x [4.49] l.1384 - pTeX:
+@<Character |k| cannot be printed@>=
+  (k<" ")or(k>"~")
+@y
+@<Character |k| cannot be printed@>=
+   not (ismultiprn(k) or xprn[k])
+@z
+
+@x [5.54] l.1514 - pTeX: Global variables
+@!trick_buf:array[0..ssup_error_line] of ASCII_code; {circular buffer for
+  pseudoprinting}
+@y
+@!trick_buf:array[0..ssup_error_line] of ASCII_code; {circular buffer for
+  pseudoprinting}
+@!trick_buf2:array[0..ssup_error_line] of 0..2; {pTeX: buffer for KANJI}
+@!kcode_pos: 0..2; {pTeX: denotes whether first byte or second byte of KANJI}
+@z
+
+@x [5.55] l.1519 - pTeX: Initialize the kcode_pos
+@ @<Initialize the output routines@>=
+selector:=term_only; tally:=0; term_offset:=0; file_offset:=0;
+@y
+@ @<Initialize the output routines@>=
+selector:=term_only; tally:=0; term_offset:=0; file_offset:=0;
+kcode_pos:=0;
+@z
+
+@x [5.57] l.1538 - pTeX: kcode_pos
+procedure print_ln; {prints an end-of-line}
+begin case selector of
+term_and_log: begin wterm_cr; wlog_cr;
+  term_offset:=0; file_offset:=0;
+  end;
+log_only: begin wlog_cr; file_offset:=0;
+  end;
+term_only: begin wterm_cr; term_offset:=0;
+  end;
+no_print,pseudo,new_string: do_nothing;
+othercases write_ln(write_file[selector])
+endcases;@/
+@y
+procedure print_ln; {prints an end-of-line}
+begin case selector of
+term_and_log: begin
+  if kcode_pos=1 then begin wterm(' '); wlog(' '); end;
+  wterm_cr; wlog_cr; term_offset:=0; file_offset:=0;
+  end;
+log_only: begin if kcode_pos=1 then wlog(' ');
+  wlog_cr; file_offset:=0;
+  end;
+term_only: begin if kcode_pos=1 then wterm(' ');
+  wterm_cr; term_offset:=0;
+  end;
+no_print,pseudo,new_string: do_nothing;
+othercases write_ln(write_file[selector])
+endcases;@/
+kcode_pos:=0;
+@z
+
+@x [5.58] l.1557 - pTeX: kcode_pos, trick_buf2
+procedure print_char(@!s:ASCII_code); {prints a single character}
+label exit;
+begin if @<Character |s| is the current new-line character@> then
+ if selector<pseudo then
+  begin print_ln; return;
+  end;
+case selector of
+term_and_log: begin wterm(xchr[s]); wlog(xchr[s]);
+  incr(term_offset); incr(file_offset);
+  if term_offset=max_print_line then
+    begin wterm_cr; term_offset:=0;
+    end;
+  if file_offset=max_print_line then
+    begin wlog_cr; file_offset:=0;
+    end;
+  end;
+log_only: begin wlog(xchr[s]); incr(file_offset);
+  if file_offset=max_print_line then print_ln;
+  end;
+term_only: begin wterm(xchr[s]); incr(term_offset);
+  if term_offset=max_print_line then print_ln;
+  end;
+no_print: do_nothing;
+pseudo: if tally<trick_count then trick_buf[tally mod error_line]:=s;
+@y
+procedure print_char(@!s:ASCII_code); {prints a single character}
+label exit; {label is not used but nonetheless kept (for other changes?)}
+begin if @<Character |s| is the current new-line character@> then
+ if selector<pseudo then
+  begin print_ln; return;
+  end;
+if kcode_pos=1 then kcode_pos:=2
+else if iskanji1(xchr[s]) then
+  begin kcode_pos:=1;
+  if (selector=term_and_log)or(selector=log_only) then
+    if file_offset>=max_print_line-1 then
+       begin wlog_cr; file_offset:=0;
+       end;
+  if (selector=term_and_log)or(selector=term_only) then
+    if term_offset>=max_print_line-1 then
+       begin wterm_cr; term_offset:=0;
+       end;
+  end
+else kcode_pos:=0;
+case selector of
+term_and_log: begin wterm(xchr[s]); incr(term_offset);
+  if term_offset=max_print_line then
+    begin wterm_cr; term_offset:=0;
+    end;
+  wlog(xchr[s]); incr(file_offset);
+  if file_offset=max_print_line then
+    begin wlog_cr; file_offset:=0;
+    end;
+  end;
+log_only: begin wlog(xchr[s]); incr(file_offset);
+  if file_offset=max_print_line then print_ln;
+  end;
+term_only: begin wterm(xchr[s]); incr(term_offset);
+  if term_offset=max_print_line then print_ln;
+  end;
+no_print: do_nothing;
+pseudo: if tally<trick_count then
+  begin trick_buf[tally mod error_line]:=s;
+  trick_buf2[tally mod error_line]:=kcode_pos;
+  end;
+@z
+
+@x l.1603 - pTeX
+procedure print(@!s:integer); {prints string |s|}
+label exit;
+var j:pool_pointer; {current character code position}
+@!nl:integer; {new-line character to restore}
+begin if s>=str_ptr then s:="???" {this can't happen}
+@.???@>
+else if s<256 then
+  if s<0 then s:="???" {can't happen}
+  else begin if selector>pseudo then
+      begin print_char(s); return; {internal strings are not expanded}
+      end;
+    if (@<Character |s| is the current new-line character@>) then
+      if selector<pseudo then
+        begin print_ln; return;
+        end;
+    nl:=new_line_char; new_line_char:=-1;
+      {temporarily disable new-line character}
+    j:=str_start[s];
+    while j<str_start[s+1] do
+      begin print_char(so(str_pool[j])); incr(j);
+      end;
+    new_line_char:=nl; return;
+    end;
+j:=str_start[s];
+while j<str_start[s+1] do
+  begin print_char(so(str_pool[j])); incr(j);
+  end;
+exit:end;
+@y
+procedure print(@!s:integer); {prints string |s|}
+label exit;
+var j:pool_pointer; {current character code position}
+@!nl:integer; {new-line character to restore}
+begin if s>=str_ptr then s:="???" {this can't happen}
+@.???@>
+else if s<256 then
+  if s<0 then s:="???" {can't happen}
+  else begin if selector>pseudo then
+      begin print_char(s); return; {internal strings are not expanded}
+      end;
+    if (@<Character |s| is the current new-line character@>) then
+      if selector<pseudo then
+        begin print_ln; return;
+        end;
+    nl:=new_line_char; new_line_char:=-1;
+      {temporarily disable new-line character}
+    j:=str_start[s];
+    while j<str_start[s+1] do
+      begin print_char(so(str_pool[j])); incr(j);
+      end;
+    new_line_char:=nl; return;
+    end;
+j:=str_start[s];
+while j<str_start[s+1] do
+  begin print_char(so(str_pool[j])); incr(j);
+  end;
+exit:end;
+@z
+
+@x [5.61] l.1656 - pTeX:
+@<Initialize the output...@>=
+if src_specials_p or file_line_error_style_p or parse_first_line_p then
+  wterm(banner_k)
+else
+  wterm(banner);
+@y
+@<Initialize the output...@>=
+if src_specials_p or file_line_error_style_p or parse_first_line_p then
+  wterm(banner_k)
+else
+  wterm(banner);
+  wterm(' (');
+  wterm(conststringcast(get_enc_string));
+  wterm(')');
+@z
+
+@x l.1820 - pTeX
+k:=first; while k < last do begin print_buffer(k) end;
+@y
+if last<>first then for k:=first to last-1 do print(buffer[k]);
+@z
+
+@x [8.112] l.2588 - pTeX:
+@d ho(#)==# {to take a sixteen-bit item from a halfword}
+@y
+@d ho(#)==# {to take a sixteen-bit item from a halfword}
+@d KANJI(#)==# {pTeX: to output an KANJI code into a halfword}
+@d tokanji(#)==# {pTeX: to take an KANJI code into a halfword}
+@d tonum(#)==# {pTeX: to put an KANJI code into a halfword}
+@z
+
+@x [10.135] l.3008 - pTeX: box_dir, space_ptr, xspace_ptr
+@d hlist_node=0 {|type| of hlist nodes}
+@d box_node_size=7 {number of words to allocate for a box node}
+@d width_offset=1 {position of |width| field in a box node}
+@d depth_offset=2 {position of |depth| field in a box node}
+@d height_offset=3 {position of |height| field in a box node}
+@d width(#) == mem[#+width_offset].sc {width of the box, in sp}
+@d depth(#) == mem[#+depth_offset].sc {depth of the box, in sp}
+@d height(#) == mem[#+height_offset].sc {height of the box, in sp}
+@d shift_amount(#) == mem[#+4].sc {repositioning distance, in sp}
+@d list_offset=5 {position of |list_ptr| field in a box node}
+@d list_ptr(#) == link(#+list_offset) {beginning of the list inside the box}
+@d glue_order(#) == subtype(#+list_offset) {applicable order of infinity}
+@d glue_sign(#) == type(#+list_offset) {stretching or shrinking}
+@d normal=0 {the most common case when several cases are named}
+@d stretching = 1 {glue setting applies to the stretch components}
+@d shrinking = 2 {glue setting applies to the shrink components}
+@d glue_offset = 6 {position of |glue_set| in a box node}
+@d glue_set(#) == mem[#+glue_offset].gr
+  {a word of type |glue_ratio| for glue setting}
+@y
+@d hlist_node=0 {|type| of hlist nodes}
+@d box_node_size=8 {number of words to allocate for a box node}
+@#
+@d box_dir(#) == subtype(#) {direction mode of a box}
+@d dir_default == qi(0) {direction of the box, default Left to Right}
+@d dir_dtou == qi(1) {direction of the box, Bottom to Top}
+@d dir_tate == qi(3) {direction of the box, Top to Bottom}
+@d dir_yoko == qi(4) {direction of the box, equal default}
+@d any_dir == dir_yoko,dir_tate,dir_dtou
+@#
+@d width_offset=1 {position of |width| field in a box node}
+@d depth_offset=2 {position of |depth| field in a box node}
+@d height_offset=3 {position of |height| field in a box node}
+@d width(#) == mem[#+width_offset].sc {width of the box, in sp}
+@d depth(#) == mem[#+depth_offset].sc {depth of the box, in sp}
+@d height(#) == mem[#+height_offset].sc {height of the box, in sp}
+@d shift_amount(#) == mem[#+4].sc {repositioning distance, in sp}
+@d list_offset=5 {position of |list_ptr| field in a box node}
+@d list_ptr(#) == link(#+list_offset) {beginning of the list inside the box}
+@d glue_order(#) == subtype(#+list_offset) {applicable order of infinity}
+@d glue_sign(#) == type(#+list_offset) {stretching or shrinking}
+@d normal=0 {the most common case when several cases are named}
+@d stretching = 1 {glue setting applies to the stretch components}
+@d shrinking = 2 {glue setting applies to the shrink components}
+@d glue_offset = 6 {position of |glue_set| in a box node}
+@d glue_set(#) == mem[#+glue_offset].gr
+  {a word of type |glue_ratio| for glue setting}
+@d space_offset = 7 {position of |glue_set| in a box node}
+@d space_ptr(#) == link(#+space_offset)
+@d xspace_ptr(#) == info(#+space_offset)
+@z
+
+@x [10.136] l.3037 - pTeX: space_ptr, xspace_ptr
+width(p):=0; depth(p):=0; height(p):=0; shift_amount(p):=0; list_ptr(p):=null;
+glue_sign(p):=normal; glue_order(p):=normal; set_glue_ratio_zero(glue_set(p));
+@y
+width(p):=0; depth(p):=0; height(p):=0; shift_amount(p):=0; list_ptr(p):=null;
+glue_sign(p):=normal; glue_order(p):=normal; set_glue_ratio_zero(glue_set(p));
+space_ptr(p):=zero_glue; xspace_ptr(p):=zero_glue;
+add_glue_ref(zero_glue); add_glue_ref(zero_glue);
+@z
+
+@x [10.137] l.3045 - pTeX: direction change node
+@d vlist_node=1 {|type| of vlist nodes}
+@y
+@d vlist_node=1 {|type| of vlist nodes}
+
+@ A |dir_node| stands for direction change.
+
+@d dir_node=2 {|type| of dir nodes}
+
+@p function new_dir_node(b:pointer; dir:eight_bits):pointer;
+var p:pointer; {the new node}
+begin if type(b)>vlist_node then confusion("new_dir_node:not box");
+p:=new_null_box; type(p):=dir_node; box_dir(p):=dir;
+case box_dir(b) of
+  dir_yoko: @<Yoko to other direction@>;
+  dir_tate: @<Tate to other direction@>;
+  dir_dtou: @<DtoU to other direction@>;
+  othercases confusion("new_dir_node:illegal dir");
+endcases;
+link(b):=null; list_ptr(p):=b;
+new_dir_node:=p;
+end;
+
+@ @<Yoko to other direction@>=
+  case dir of
+  dir_tate: begin width(p):=height(b)+depth(b);
+      depth(p):=width(b)/2; height(p):=width(b)-depth(p);
+      end;
+  dir_dtou: begin width(p):=height(b)+depth(b);
+      depth(p):=0; height(p):=width(b);
+      end;
+  othercases confusion("new_dir_node:y->?");
+  endcases
+
+@ @<Tate to other direction@>=
+  case dir of
+  dir_yoko: begin width(p):=height(b)+depth(b);
+      depth(p):=0; height(p):=width(b);
+      end;
+  dir_dtou: begin width(p):=width(b);
+      depth(p):=height(b); height(p):=depth(b);
+      end;
+  othercases confusion("new_dir_node:t->?");
+  endcases
+
+@ @<DtoU to other direction@>=
+  case dir of
+  dir_yoko: begin width(p):=height(b)+depth(b);
+      depth(p):=0; height(p):=width(b);
+      end;
+  dir_tate: begin width(p):=width(b);
+      depth(p):=height(b); height(p):=depth(b);
+      end;
+  othercases confusion("new_dir_node:d->?");
+  endcases
+@z
+
+@x [10.138] l.3054 - pTeX: renumber rule_node
+@d rule_node=2 {|type| of rule nodes}
+@y
+@d rule_node=3 {|type| of rule nodes}
+@z
+
+@x [10.140] l.3083 - pTeX: renumber ins_node, add ins_dir field
+@d ins_node=3 {|type| of insertion nodes}
+@d ins_node_size=5 {number of words to allocate for an insertion}
+@d float_cost(#)==mem[#+1].int {the |floating_penalty| to be used}
+@d ins_ptr(#)==info(#+4) {the vertical list to be inserted}
+@d split_top_ptr(#)==link(#+4) {the |split_top_skip| to be used}
+@y
+@d ins_node=4 {|type| of insertion nodes}
+@d ins_node_size=6 {number of words to allocate for an insertion}
+@d float_cost(#)==mem[#+1].int {the |floating_penalty| to be used}
+@d ins_ptr(#)==info(#+4) {the vertical list to be inserted}
+@d split_top_ptr(#)==link(#+4) {the |split_top_skip| to be used}
+@d ins_dir(#)==subtype(#+5) {direction of |ins_node|}
+@z
+
+@x [10.141] l.3089 - pTeX: disp_node
+@ A |mark_node| has a |mark_ptr| field that points to the reference count
+@y
+@ A |disp_node| has a |disp_dimen| field that points to the displacement
+distance of the baselineshift between Latin characters and Kanji chatacters.
+
+@d disp_node=5 {|type| of a displace node}
+@d disp_dimen(#)==mem[#+1].sc
+
+@ A |mark_node| has a |mark_ptr| field that points to the reference count
+@z
+
+@x [10.140] l.3095 - pTeX: renumber nodes
+@d mark_node=4 {|type| of a mark node}
+@y
+@d mark_node=6 {|type| of a mark node}
+@z
+
+@x [10.141] l.3105 - pTeX: renumber nodes
+@d adjust_node=5 {|type| of an adjust node}
+@y
+@d adjust_node=7 {|type| of an adjust node}
+@z
+
+@x [10.142] l.3122 - pTeX: renumber nodes
+@d ligature_node=6 {|type| of a ligature node}
+@y
+@d ligature_node=8 {|type| of a ligature node}
+@z
+
+@x [10.145] l.3163 - pTeX: renumber nodes
+@d disc_node=7 {|type| of a discretionary node}
+@y
+@d disc_node=9 {|type| of a discretionary node}
+@z
+
+@x [10.146] l.3191 - pTeX: renumber nodes
+@d whatsit_node=8 {|type| of special extension nodes}
+@y
+@d whatsit_node=10 {|type| of special extension nodes}
+@z
+
+@x [10.147] l.3198 - pTeX: renumber nodes
+@d math_node=9 {|type| of a math node}
+@y
+@d math_node=11 {|type| of a math node}
+@z
+
+@x [10.150] l.3244 - pTeX: renumber nodes
+@d glue_node=10 {|type| of node that points to a glue specification}
+@y
+@d glue_node=12 {|type| of node that points to a glue specification}
+@z
+
+@x [10.155] l.3342 - pTeX: renumber nodes
+@d kern_node=11 {|type| of a kern node}
+@d explicit=1 {|subtype| of kern nodes from \.{\\kern} and \.{\\/}}
+@d acc_kern=2 {|subtype| of kern nodes from accents}
+@y
+@d kern_node=13 {|type| of a kern node}
+@d explicit=1 {|subtype| of kern nodes from \.{\\kern}}
+@d acc_kern=2 {|subtype| of kern nodes from accents}
+@d ita_kern=3 {|subtype| of kern nodes from \.{\\/}}
+@z
+
+@x [10.157] l.3363 - pTeX: renumber nodes
+@d penalty_node=12 {|type| of a penalty node}
+@y
+@d penalty_node=14 {|type| of a penalty node}
+@d widow_pena=1 {|subtype| of penalty nodes from \.{\\jchrwidowpenalty}}
+@d kinsoku_pena=2 {|subtype| of penalty nodes from kinsoku}
+@z
+
+@x [10.159] l.3392 - pTeX: renumber nodes
+@d unset_node=13 {|type| for an unset node}
+@y
+@d unset_node=15 {|type| for an unset node}
+@z
+
+@x [10.160] l.3397 - pTeX: renumber nodes
+@ In fact, there are still more types coming. When we get to math formula
+processing we will see that a |style_node| has |type=14|; and a number
+of larger type codes will also be defined, for use in math mode only.
+@y
+@ In fact, there are still more types coming. When we get to math formula
+processing we will see that a |style_node| has |type=16|; and a number
+of larger type codes will also be defined, for use in math mode only.
+@z
+
+@x [12.174] l.3662 - pTeX: print KANJI
+      print_ASCII(qo(character(p)));
+@y
+      if font_dir[font(p)]<>dir_default then
+        begin p:=link(p); print_kanji(info(p));
+        end
+      else print_ASCII(qo(character(p)));
+@z
+
+@x [12.175] l.3672 - pTeX: Print a short indication of dir_nodes.
+hlist_node,vlist_node,ins_node,whatsit_node,mark_node,adjust_node,
+  unset_node: print("[]");
+@y
+hlist_node,vlist_node,dir_node,ins_node,whatsit_node,
+  mark_node,adjust_node,unset_node: print("[]");
+@z
+
+@x [12.176] l.3698 - pTeX: print KANJI.
+  print_char(" "); print_ASCII(qo(character(p)));
+@y
+  print_char(" ");
+  if font_dir[font(p)]<>dir_default then
+    begin p:=link(p); print_kanji(info(p));
+    end
+  else print_ASCII(qo(character(p)));
+@z
+
+@x [12.183] l.3815 - pTeX: display char_node and disp_node.
+if is_char_node(p) then print_font_and_char(p)
+else  case type(p) of
+  hlist_node,vlist_node,unset_node: @<Display box |p|@>;
+  rule_node: @<Display rule |p|@>;
+  ins_node: @<Display insertion |p|@>;
+  whatsit_node: @<Display the whatsit node |p|@>;
+@y
+if is_char_node(p) then
+  begin print_font_and_char(p);
+  if font_dir[font(p)]<>dir_default then p:=link(p)
+  end
+else  case type(p) of
+  hlist_node,vlist_node,dir_node,unset_node: @<Display box |p|@>;
+  rule_node: @<Display rule |p|@>;
+  ins_node: @<Display insertion |p|@>;
+  whatsit_node: @<Display the whatsit node |p|@>;
+  disp_node: begin print_esc("displace "); print_scaled(disp_dimen(p));
+    end;
+@z
+
+@x [12.184] l.3833 - pTeX: display dir_node.
+@ @<Display box |p|@>=
+begin if type(p)=hlist_node then print_esc("h")
+else if type(p)=vlist_node then print_esc("v")
+else print_esc("unset");
+@y
+@ @<Display box |p|@>=
+begin case type(p) of
+  hlist_node: print_esc("h");
+  vlist_node: print_esc("v");
+  dir_node: print_esc("dir");
+  othercases print_esc("unset")
+  endcases@/;
+@z
+@x [12.184] l.3842 - pTeX: display dir_node.
+  if shift_amount(p)<>0 then
+    begin print(", shifted "); print_scaled(shift_amount(p));
+    end;
+@y
+  if shift_amount(p)<>0 then
+    begin print(", shifted "); print_scaled(shift_amount(p));
+    end;
+@z
+@x [12.184] l.3845 - pTeX: display dir_node.
+  end;
+@y
+  if box_dir(p)<>dir_default then
+    begin print_direction_alt(box_dir(p));
+    end;
+  end;
+@z
+
+@x [12.188] l.3896 - pTeX: Display insertion and ins_dir.
+@ @<Display insertion |p|@>=
+begin print_esc("insert"); print_int(qo(subtype(p)));
+print(", natural size "); print_scaled(height(p));
+@y
+@ @<Display insertion |p|@>=
+begin print_esc("insert"); print_int(qo(subtype(p)));
+print_dir(ins_dir(p));
+print(", natural size "); print_scaled(height(p));
+@z
+
+@x [12.194] l.3961 - pTeX: Display penalty usage
+@ @<Display penalty |p|@>=
+begin print_esc("penalty "); print_int(penalty(p));
+end
+@y
+@ @<Display penalty |p|@>=
+begin print_esc("penalty "); print_int(penalty(p));
+if subtype(p)=widow_pena then print("(for \jchrwidowpenalty)")
+else if subtype(p)=kinsoku_pena then print("(for kinsoku)");
+end
+@z
+
+@x [13.202] l.4043 - pTeX: dir_node, disp_node
+    hlist_node,vlist_node,unset_node: begin flush_node_list(list_ptr(p));
+      free_node(p,box_node_size); goto done;
+      end;
+@y
+    hlist_node,vlist_node,dir_node,unset_node:
+      begin flush_node_list(list_ptr(p));
+      fast_delete_glue_ref(space_ptr(p));
+      fast_delete_glue_ref(xspace_ptr(p));
+      free_node(p,box_node_size); goto done;
+      end;
+@z
+
+@x [13.202] l.4056 - pTeX:
+    kern_node,math_node,penalty_node: do_nothing;
+@y
+    kern_node,disp_node,math_node,penalty_node: do_nothing;
+@z
+
+@x [14.206] l.4121 - pTeX: space_ptr, xspace_ptr, dir_node, disp_node
+@ @<Case statement to copy...@>=
+case type(p) of
+hlist_node,vlist_node,unset_node: begin r:=get_node(box_node_size);
+  mem[r+6]:=mem[p+6]; mem[r+5]:=mem[p+5]; {copy the last two words}
+  list_ptr(r):=copy_node_list(list_ptr(p)); {this affects |mem[r+5]|}
+  words:=5;
+  end;
+rule_node: begin r:=get_node(rule_node_size); words:=rule_node_size;
+  end;
+ins_node: begin r:=get_node(ins_node_size); mem[r+4]:=mem[p+4];
+  add_glue_ref(split_top_ptr(p));
+  ins_ptr(r):=copy_node_list(ins_ptr(p)); {this affects |mem[r+4]|}
+  words:=ins_node_size-1;
+  end;
+@y
+@ @<Case statement to copy...@>=
+case type(p) of
+hlist_node,vlist_node,dir_node,unset_node:
+  begin r:=get_node(box_node_size);
+  mem[r+7]:=mem[p+7];
+  mem[r+6]:=mem[p+6]; mem[r+5]:=mem[p+5]; {copy the last three words}
+  add_glue_ref(space_ptr(r)); add_glue_ref(xspace_ptr(r));
+  list_ptr(r):=copy_node_list(list_ptr(p)); {this affects |mem[r+5]|}
+  words:=5;
+  end;
+rule_node: begin r:=get_node(rule_node_size); words:=rule_node_size;
+  end;
+ins_node: begin r:=get_node(ins_node_size);
+  mem[r+5]:=mem[p+5]; mem[r+4]:=mem[p+4];
+  add_glue_ref(split_top_ptr(p));
+  ins_ptr(r):=copy_node_list(ins_ptr(p)); {this affects |mem[r+4]|}
+  words:=ins_node_size-2;
+  end;
+@z
+
+@x [14.206] l.4140 - pTeX: disp_node
+kern_node,math_node,penalty_node: begin r:=get_node(small_node_size);
+  words:=small_node_size;
+  end;
+@y
+kern_node,disp_node,math_node,penalty_node:
+  begin r:=get_node(small_node_size); words:=small_node_size;
+  end;
+@z
+
+@x [15.207] l.4201 - pTeX: Add kanji, kana, other_kchar category codes.
+@d max_char_code=15 {largest catcode for individual characters}
+@y
+@d kanji=16 {kanji}
+@d kana=17 {hiragana, katakana, alphabet}
+@d other_kchar=18 {kanji codes}
+@d max_char_code=18 {largest catcode for individual characters}
+@z
+
+@x [15.208] l.4207 - pTeX: Add inhibit_glue, chg_dir.
+@d char_num=16 {character specified numerically ( \.{\\char} )}
+@d math_char_num=17 {explicit math code ( \.{\\mathchar} )}
+@d mark=18 {mark definition ( \.{\\mark} )}
+@d xray=19 {peek inside of \TeX\ ( \.{\\show}, \.{\\showbox}, etc.~)}
+@d make_box=20 {make a box ( \.{\\box}, \.{\\copy}, \.{\\hbox}, etc.~)}
+@d hmove=21 {horizontal motion ( \.{\\moveleft}, \.{\\moveright} )}
+@d vmove=22 {vertical motion ( \.{\\raise}, \.{\\lower} )}
+@d un_hbox=23 {unglue a box ( \.{\\unhbox}, \.{\\unhcopy} )}
+@d un_vbox=24 {unglue a box ( \.{\\unvbox}, \.{\\unvcopy} )}
+@d remove_item=25 {nullify last item ( \.{\\unpenalty},
+  \.{\\unkern}, \.{\\unskip} )}
+@d hskip=26 {horizontal glue ( \.{\\hskip}, \.{\\hfil}, etc.~)}
+@d vskip=27 {vertical glue ( \.{\\vskip}, \.{\\vfil}, etc.~)}
+@d mskip=28 {math glue ( \.{\\mskip} )}
+@d kern=29 {fixed space ( \.{\\kern})}
+@d mkern=30 {math kern ( \.{\\mkern} )}
+@d leader_ship=31 {use a box ( \.{\\shipout}, \.{\\leaders}, etc.~)}
+@d halign=32 {horizontal table alignment ( \.{\\halign} )}
+@d valign=33 {vertical table alignment ( \.{\\valign} )}
+@d no_align=34 {temporary escape from alignment ( \.{\\noalign} )}
+@d vrule=35 {vertical rule ( \.{\\vrule} )}
+@d hrule=36 {horizontal rule ( \.{\\hrule} )}
+@d insert=37 {vlist inserted in box ( \.{\\insert} )}
+@d vadjust=38 {vlist inserted in enclosing paragraph ( \.{\\vadjust} )}
+@d ignore_spaces=39 {gobble |spacer| tokens ( \.{\\ignorespaces} )}
+@d after_assignment=40 {save till assignment is done ( \.{\\afterassignment} )}
+@d after_group=41 {save till group is done ( \.{\\aftergroup} )}
+@d break_penalty=42 {additional badness ( \.{\\penalty} )}
+@d start_par=43 {begin paragraph ( \.{\\indent}, \.{\\noindent} )}
+@d ital_corr=44 {italic correction ( \.{\\/} )}
+@d accent=45 {attach accent in text ( \.{\\accent} )}
+@d math_accent=46 {attach accent in math ( \.{\\mathaccent} )}
+@d discretionary=47 {discretionary texts ( \.{\\-}, \.{\\discretionary} )}
+@d eq_no=48 {equation number ( \.{\\eqno}, \.{\\leqno} )}
+@d left_right=49 {variable delimiter ( \.{\\left}, \.{\\right} )}
+@d math_comp=50 {component of formula ( \.{\\mathbin}, etc.~)}
+@d limit_switch=51 {diddle limit conventions ( \.{\\displaylimits}, etc.~)}
+@d above=52 {generalized fraction ( \.{\\above}, \.{\\atop}, etc.~)}
+@d math_style=53 {style specification ( \.{\\displaystyle}, etc.~)}
+@d math_choice=54 {choice specification ( \.{\\mathchoice} )}
+@d non_script=55 {conditional math glue ( \.{\\nonscript} )}
+@d vcenter=56 {vertically center a vbox ( \.{\\vcenter} )}
+@d case_shift=57 {force specific case ( \.{\\lowercase}, \.{\\uppercase}~)}
+@d message=58 {send to user ( \.{\\message}, \.{\\errmessage} )}
+@d extension=59 {extensions to \TeX\ ( \.{\\write}, \.{\\special}, etc.~)}
+@d in_stream=60 {files for reading ( \.{\\openin}, \.{\\closein} )}
+@d begin_group=61 {begin local grouping ( \.{\\begingroup} )}
+@d end_group=62 {end local grouping ( \.{\\endgroup} )}
+@d omit=63 {omit alignment template ( \.{\\omit} )}
+@d ex_space=64 {explicit space ( \.{\\\ } )}
+@d no_boundary=65 {suppress boundary ligatures ( \.{\\noboundary} )}
+@d radical=66 {square root and similar signs ( \.{\\radical} )}
+@d end_cs_name=67 {end control sequence ( \.{\\endcsname} )}
+@d min_internal=68 {the smallest code that can follow \.{\\the}}
+@d char_given=68 {character code defined by \.{\\chardef}}
+@d math_given=69 {math code defined by \.{\\mathchardef}}
+@d last_item=70 {most recent item ( \.{\\lastpenalty},
+  \.{\\lastkern}, \.{\\lastskip} )}
+@d max_non_prefixed_command=70 {largest command code that can't be \.{\\global}}
+@y
+@d char_num=max_char_code+1 {character specified numerically ( \.{\\char} )}
+@d math_char_num=char_num+1 {explicit math code ( \.{\\mathchar} )}
+@d mark=math_char_num+1 {mark definition ( \.{\\mark} )}
+@d xray=mark+1 {peek inside of \TeX\ ( \.{\\show}, \.{\\showbox}, etc.~)}
+@d make_box=xray+1 {make a box ( \.{\\box}, \.{\\copy}, \.{\\hbox}, etc.~)}
+@d hmove=make_box+1 {horizontal motion ( \.{\\moveleft}, \.{\\moveright} )}
+@d vmove=hmove+1 {vertical motion ( \.{\\raise}, \.{\\lower} )}
+@d un_hbox=vmove+1 {unglue a box ( \.{\\unhbox}, \.{\\unhcopy} )}
+@d un_vbox=un_hbox+1 {unglue a box ( \.{\\unvbox}, \.{\\unvcopy} )}
+@d remove_item=un_vbox+1 {nullify last item ( \.{\\unpenalty},
+  \.{\\unkern}, \.{\\unskip} )}
+@d hskip=remove_item+1 {horizontal glue ( \.{\\hskip}, \.{\\hfil}, etc.~)}
+@d vskip=hskip+1 {vertical glue ( \.{\\vskip}, \.{\\vfil}, etc.~)}
+@d mskip=vskip+1 {math glue ( \.{\\mskip} )}
+@d kern=mskip+1 {fixed space ( \.{\\kern})}
+@d mkern=kern+1 {math kern ( \.{\\mkern} )}
+@d leader_ship=mkern+1 {use a box ( \.{\\shipout}, \.{\\leaders}, etc.~)}
+@d halign=leader_ship+1 {horizontal table alignment ( \.{\\halign} )}
+@d valign=halign+1 {vertical table alignment ( \.{\\valign} )}
+@d no_align=valign+1 {temporary escape from alignment ( \.{\\noalign} )}
+@d vrule=no_align+1 {vertical rule ( \.{\\vrule} )}
+@d hrule=vrule+1 {horizontal rule ( \.{\\hrule} )}
+@d insert=hrule+1 {vlist inserted in box ( \.{\\insert} )}
+@d vadjust=insert+1 {vlist inserted in enclosing paragraph ( \.{\\vadjust} )}
+@d ignore_spaces=vadjust+1 {gobble |spacer| tokens ( \.{\\ignorespaces} )}
+@d after_assignment=ignore_spaces+1 {save till assignment is done ( \.{\\afterassignment} )}
+@d after_group=after_assignment+1 {save till group is done ( \.{\\aftergroup} )}
+@d break_penalty=after_group+1 {additional badness ( \.{\\penalty} )}
+@d start_par=break_penalty+1 {begin paragraph ( \.{\\indent}, \.{\\noindent} )}
+@d ital_corr=start_par+1 {italic correction ( \.{\\/} )}
+@d accent=ital_corr+1 {attach accent in text ( \.{\\accent} )}
+@d math_accent=accent+1 {attach accent in math ( \.{\\mathaccent} )}
+@d discretionary=math_accent+1 {discretionary texts ( \.{\\-}, \.{\\discretionary} )}
+@d eq_no=discretionary+1 {equation number ( \.{\\eqno}, \.{\\leqno} )}
+@d left_right=eq_no+1 {variable delimiter ( \.{\\left}, \.{\\right} )}
+@d math_comp=left_right+1 {component of formula ( \.{\\mathbin}, etc.~)}
+@d limit_switch=math_comp+1 {diddle limit conventions ( \.{\\displaylimits}, etc.~)}
+@d above=limit_switch+1 {generalized fraction ( \.{\\above}, \.{\\atop}, etc.~)}
+@d math_style=above+1 {style specification ( \.{\\displaystyle}, etc.~)}
+@d math_choice=math_style+1 {choice specification ( \.{\\mathchoice} )}
+@d non_script=math_choice+1 {conditional math glue ( \.{\\nonscript} )}
+@d vcenter=non_script+1 {vertically center a vbox ( \.{\\vcenter} )}
+@d case_shift=vcenter+1 {force specific case ( \.{\\lowercase}, \.{\\uppercase}~)}
+@d message=case_shift+1 {send to user ( \.{\\message}, \.{\\errmessage} )}
+@d extension=message+1 {extensions to \TeX\ ( \.{\\write}, \.{\\special}, etc.~)}
+@d in_stream=extension+1 {files for reading ( \.{\\openin}, \.{\\closein} )}
+@d begin_group=in_stream+1 {begin local grouping ( \.{\\begingroup} )}
+@d end_group=begin_group+1 {end local grouping ( \.{\\endgroup} )}
+@d omit=end_group+1 {omit alignment template ( \.{\\omit} )}
+@d ex_space=omit+1 {explicit space ( \.{\\\ } )}
+@d no_boundary=ex_space+1 {suppress boundary ligatures ( \.{\\noboundary} )}
+@d radical=no_boundary+1 {square root and similar signs ( \.{\\radical} )}
+@d end_cs_name=radical+1 {end control sequence ( \.{\\endcsname} )}
+@d min_internal=end_cs_name+1 {the smallest code that can follow \.{\\the}}
+@d char_given=min_internal {character code defined by \.{\\chardef}}
+@d math_given=char_given+1 {math code defined by \.{\\mathchardef}}
+@d last_item=math_given+1 {most recent item ( \.{\\lastpenalty},
+  \.{\\lastkern}, \.{\\lastskip} )}
+@d inhibit_glue=last_item+1 {inhibit adjust glue ( \.{\\inhibitglue} )}
+@d chg_dir=inhibit_glue+1 {change dir mode by \.{\\tate}, \.{\\yoko}}
+@d max_non_prefixed_command=chg_dir {largest command code that can't be \.{\\global}}
+@z
+
+@x [15.209] l.4272 - pTeX: def_jfont, def_tfont, set_auto_spacing
+@d toks_register=71 {token list register ( \.{\\toks} )}
+@d assign_toks=72 {special token list ( \.{\\output}, \.{\\everypar}, etc.~)}
+@d assign_int=73 {user-defined integer ( \.{\\tolerance}, \.{\\day}, etc.~)}
+@d assign_dimen=74 {user-defined length ( \.{\\hsize}, etc.~)}
+@d assign_glue=75 {user-defined glue ( \.{\\baselineskip}, etc.~)}
+@d assign_mu_glue=76 {user-defined muglue ( \.{\\thinmuskip}, etc.~)}
+@d assign_font_dimen=77 {user-defined font dimension ( \.{\\fontdimen} )}
+@d assign_font_int=78 {user-defined font integer ( \.{\\hyphenchar},
+  \.{\\skewchar} )}
+@d set_aux=79 {specify state info ( \.{\\spacefactor}, \.{\\prevdepth} )}
+@d set_prev_graf=80 {specify state info ( \.{\\prevgraf} )}
+@d set_page_dimen=81 {specify state info ( \.{\\pagegoal}, etc.~)}
+@d set_page_int=82 {specify state info ( \.{\\deadcycles},
+  \.{\\insertpenalties} )}
+@d set_box_dimen=83 {change dimension of box ( \.{\\wd}, \.{\\ht}, \.{\\dp} )}
+@d set_shape=84 {specify fancy paragraph shape ( \.{\\parshape} )}
+@d def_code=85 {define a character code ( \.{\\catcode}, etc.~)}
+@d def_family=86 {declare math fonts ( \.{\\textfont}, etc.~)}
+@d set_font=87 {set current font ( font identifiers )}
+@d def_font=88 {define a font file ( \.{\\font} )}
+@d register=89 {internal register ( \.{\\count}, \.{\\dimen}, etc.~)}
+@d max_internal=89 {the largest code that can follow \.{\\the}}
+@d advance=90 {advance a register or parameter ( \.{\\advance} )}
+@d multiply=91 {multiply a register or parameter ( \.{\\multiply} )}
+@d divide=92 {divide a register or parameter ( \.{\\divide} )}
+@d prefix=93 {qualify a definition ( \.{\\global}, \.{\\long}, \.{\\outer} )}
+@d let=94 {assign a command code ( \.{\\let}, \.{\\futurelet} )}
+@d shorthand_def=95 {code definition ( \.{\\chardef}, \.{\\countdef}, etc.~)}
+  {or \.{\\charsubdef}}
+@d read_to_cs=96 {read into a control sequence ( \.{\\read} )}
+@d def=97 {macro definition ( \.{\\def}, \.{\\gdef}, \.{\\xdef}, \.{\\edef} )}
+@d set_box=98 {set a box ( \.{\\setbox} )}
+@d hyph_data=99 {hyphenation data ( \.{\\hyphenation}, \.{\\patterns} )}
+@d set_interaction=100 {define level of interaction ( \.{\\batchmode}, etc.~)}
+@d max_command=100 {the largest command code seen at |big_switch|}
+@y
+@d toks_register=max_non_prefixed_command+1 {token list register ( \.{\\toks} )}
+@d assign_toks=toks_register+1
+  {special token list ( \.{\\output}, \.{\\everypar}, etc.~)}
+@d assign_int=assign_toks+1
+  {user-defined integer ( \.{\\tolerance}, \.{\\day}, etc.~)}
+@d assign_dimen=assign_int+1 {user-defined length ( \.{\\hsize}, etc.~)}
+@d assign_glue=assign_dimen+1 {user-defined glue ( \.{\\baselineskip}, etc.~)}
+@d assign_mu_glue=assign_glue+1 {user-defined muglue ( \.{\\thinmuskip}, etc.~)}
+@d assign_font_dimen=assign_mu_glue+1
+  {user-defined font dimension ( \.{\\fontdimen} )}
+@d assign_font_int=assign_font_dimen+1
+  {user-defined font integer ( \.{\\hyphenchar}, \.{\\skewchar} )}
+@d assign_kinsoku=assign_font_int+1
+  {user-defined kinsoku character ( \.{\\prebreakpenalty},
+   \.{\\postbreakpenalty} )}
+@d assign_inhibit_xsp_code=assign_kinsoku+1
+  {user-defined inhibit xsp character ( \.{\\inhibitxspcode} )}
+@d set_kansuji_char=assign_inhibit_xsp_code+1
+  {user-defined kansuji character ( \.{\\kansujichar} )}
+@d set_aux=set_kansuji_char+1
+  {specify state info ( \.{\\spacefactor}, \.{\\prevdepth} )}
+@d set_prev_graf=set_aux+1 {specify state info ( \.{\\prevgraf} )}
+@d set_page_dimen=set_prev_graf+1 {specify state info ( \.{\\pagegoal}, etc.~)}
+@d set_page_int=set_page_dimen+1 {specify state info ( \.{\\deadcycles},
+  \.{\\insertpenalties} )}
+@d set_box_dimen=set_page_int+1 {change dimension of box ( \.{\\wd}, \.{\\ht}, \.{\\dp} )}
+@d set_shape=set_box_dimen+1 {specify fancy paragraph shape ( \.{\\parshape} )}
+@d def_code=set_shape+1 {define a character code ( \.{\\catcode}, etc.~)}
+@d def_family=def_code+1 {declare math fonts ( \.{\\textfont}, etc.~)}
+@d set_font=def_family+1 {set current font ( font identifiers )}
+@d def_font=set_font+1 {define a font file ( \.{\\font} )}
+@d def_jfont=def_font+1 {define a font file ( \.{\\jfont} )}
+@d def_tfont=def_jfont+1 {define a font file ( \.{\\tfont} )}
+@d register=def_tfont+1 {internal register ( \.{\\count}, \.{\\dimen}, etc.~)}
+@d max_internal=register {the largest code that can follow \.{\\the}}
+@d advance=max_internal+1 {advance a register or parameter ( \.{\\advance} )}
+@d multiply=advance+1 {multiply a register or parameter ( \.{\\multiply} )}
+@d divide=multiply+1 {divide a register or parameter ( \.{\\divide} )}
+@d prefix=divide+1 {qualify a definition ( \.{\\global}, \.{\\long}, \.{\\outer} )}
+@d let=prefix+1 {assign a command code ( \.{\\let}, \.{\\futurelet} )}
+@d shorthand_def=let+1 {code definition ( \.{\\chardef}, \.{\\countdef}, etc.~)}
+@d read_to_cs=shorthand_def+1 {read into a control sequence ( \.{\\read} )}
+@d def=read_to_cs+1 {macro definition ( \.{\\def}, \.{\\gdef}, \.{\\xdef}, \.{\\edef} )}
+@d set_box=def+1 {set a box ( \.{\\setbox} )}
+@d hyph_data=set_box+1 {hyphenation data ( \.{\\hyphenation}, \.{\\patterns} )}
+@d set_interaction=hyph_data+1 {define level of interaction ( \.{\\batchmode}, etc.~)}
+@d set_auto_spacing=set_interaction+1 {set auto spaceing mode
+  ( \.{\\autospacing}, \.{\\noautospacing}, ( \.{\\autospacing}, \.{\\noautospacing} )}
+@d max_command=set_auto_spacing {the largest command code seen at |big_switch|}
+@z
+
+@x [16.212] l.4437 - pTeX: last_jchr, direction, adjust direction
+@<Types...@>=
+@!list_state_record=record@!mode_field:-mmode..mmode;@+
+  @!head_field,@!tail_field: pointer;
+@y
+@<Types...@>=
+@!list_state_record=record@!mode_field:-mmode..mmode;@+
+  @!dir_field,@!adj_dir_field: -dir_dtou..dir_dtou;
+  @!pdisp_field: scaled;
+  @!head_field,@!tail_field,@!pnode_field,@!last_jchr_field: pointer;
+@z
+
+@x [16.213] l.4445 - pTeX: last_jchr, direction, adjust_dir, prev_{node,disp}
+@d head==cur_list.head_field {header node of current list}
+@d tail==cur_list.tail_field {final node on current list}
+@y
+@d direction==cur_list.dir_field {current direction}
+@d adjust_dir==cur_list.adj_dir_field {current adjust direction}
+@d head==cur_list.head_field {header node of current list}
+@d tail==cur_list.tail_field {final node on current list}
+@d prev_node==cur_list.pnode_field {previous to last |disp_node|}
+@d prev_disp==cur_list.pdisp_field {displacemant at |prev_node|}
+@d last_jchr==cur_list.last_jchr_field {final jchar node on current list}
+@z
+
+@x [16.214] l.4464 - pTeX: prev_append: disp_node
+@d tail_append(#)==begin link(tail):=#; tail:=link(tail);
+  end
+@y
+@d tail_append(#)==begin link(tail):=#; tail:=link(tail);
+  end
+@d prev_append(#)==begin link(prev_node):=#;
+  link(link(prev_node)):=tail; prev_node:=link(prev_node);
+  end
+@z
+
+@x [16.215] l.4477 - pTeX: last_jchar, direction, adjust_dir, prev_node
+mode:=vmode; head:=contrib_head; tail:=contrib_head;
+@y
+mode:=vmode; head:=contrib_head; tail:=contrib_head; prev_node:=tail;
+direction:=dir_yoko; adjust_dir:=direction; prev_disp:=0; last_jchr:=null;
+@z
+
+@x [16.216] l.4496 - pTeX: last_jchr, displacement.
+incr(nest_ptr); head:=get_avail; tail:=head; prev_graf:=0; mode_line:=line;
+@y
+incr(nest_ptr); head:=new_null_box; tail:=head; prev_node:=tail;
+prev_graf:=0; prev_disp:=0; last_jchr:=null; mode_line:=line;
+@z
+
+@x [16.217] l.4504 - pTeX: pop_nest last_jchr
+@p procedure pop_nest; {leave a semantic level, re-enter the old}
+begin free_avail(head); decr(nest_ptr); cur_list:=nest[nest_ptr];
+end;
+@y
+@p procedure pop_nest; {leave a semantic level, re-enter the old}
+begin
+fast_delete_glue_ref(space_ptr(head)); fast_delete_glue_ref(xspace_ptr(head));
+free_node(head,box_node_size); decr(nest_ptr); cur_list:=nest[nest_ptr];
+end;
+@z
+
+@x [16.218] l.4521 - pTeX: show_activities : direction
+  print_nl("### "); print_mode(m);
+@y
+  print_nl("### "); print_direction(nest[p].dir_field);
+  print(", "); print_mode(m);
+@z
+
+@x [17.224] l.4711 - pTeX: kanji_skip_code xkanji_skip_code, jfm_skip
+@d thin_mu_skip_code=15 {thin space in math formula}
+@d med_mu_skip_code=16 {medium space in math formula}
+@d thick_mu_skip_code=17 {thick space in math formula}
+@d glue_pars=18 {total number of glue parameters}
+@y
+@d kanji_skip_code=15 {between kanji-kanji space}
+@d xkanji_skip_code=16 {between latin-kanji or kanji-latin space}
+@d thin_mu_skip_code=17 {thin space in math formula}
+@d med_mu_skip_code=18 {medium space in math formula}
+@d thick_mu_skip_code=19 {thick space in math formula}
+@d jfm_skip=20 {space refer from JFM}
+@d glue_pars=21 {total number of glue parameters}
+@z
+
+@x [17.224] l.4739 - kanji_skip, xkanji_skip
+@d thick_mu_skip==glue_par(thick_mu_skip_code)
+@y
+@d thick_mu_skip==glue_par(thick_mu_skip_code)
+@d kanji_skip==glue_par(kanji_skip_code)
+@d xkanji_skip==glue_par(xkanji_skip_code)
+@z
+
+@x [17.225] l.4767 - pTeX: kanji_skip_code xkanji_skip_code
+thick_mu_skip_code: print_esc("thickmuskip");
+othercases print("[unknown glue parameter!]")
+@y
+thick_mu_skip_code: print_esc("thickmuskip");
+kanji_skip_code: print_esc("kanjiskip");
+xkanji_skip_code: print_esc("xkanjiskip");
+jfm_skip: print("refer from jfm");
+othercases print("[unknown glue parameter!]")
+@z
+
+@x [17.226] l.4813 - pTeX: kanji_skip_code xkanji_skip_code
+primitive("thickmuskip",assign_mu_glue,glue_base+thick_mu_skip_code);@/
+@!@:thick_mu_skip_}{\.{\\thickmuskip} primitive@>
+@y
+primitive("thickmuskip",assign_mu_glue,glue_base+thick_mu_skip_code);@/
+@!@:thick_mu_skip_}{\.{\\thickmuskip} primitive@>
+primitive("kanjiskip",assign_glue,glue_base+kanji_skip_code);@/
+@!@:kanji_skip_}{\.{\\kanjiskip} primitive@>
+primitive("xkanjiskip",assign_glue,glue_base+xkanji_skip_code);@/
+@!@:xkanji_skip_}{\.{\\xkanjiskip} primitive@>
+@z
+
+@x [17.230] l.4867 - pTeX: cat_code_size, cur_jfont_loc, auto_spacing, auto_xspacing, inhibit_xsp_code, cur_tfont_loc
+@d math_font_base=cur_font_loc+1 {table of 48 math font numbers}
+@d cat_code_base=math_font_base+48
+  {table of 256 command codes (the ``catcodes'')}
+@d lc_code_base=cat_code_base+256 {table of 256 lowercase mappings}
+@y
+@d math_font_base=cur_font_loc+1 {table of 48 math font numbers}
+@d cur_jfont_loc=math_font_base+48
+@d cur_tfont_loc=cur_jfont_loc+1
+@d auto_spacing_code=cur_tfont_loc+1
+@d auto_xspacing_code=auto_spacing_code+1
+@d cat_code_base=auto_xspacing_code+1
+  {table of 256 command codes (the ``catcodes'')}
+@d kcat_code_base=cat_code_base+256
+  {table of 256 command codes for the wchar's catcodes }
+@d auto_xsp_code_base=kcat_code_base+256 {table of 256 auto spacer flag}
+@d inhibit_xsp_code_base=auto_xsp_code_base+256
+@d kinsoku_base=inhibit_xsp_code_base+256 {table of 256 kinsoku mappings}
+@d kansuji_base=kinsoku_base+256 {table of 10 kansuji mappings}
+@d lc_code_base=kansuji_base+10 {table of 256 lowercase mappings}
+@z
+
+@x [17.230] l.4900 - pTeX:
+@d char_sub_code(#)==equiv(char_sub_code_base+#)
+  {Note: |char_sub_code(c)| is the true substitution info plus |min_halfword|}
+@y
+@d char_sub_code(#)==equiv(char_sub_code_base+#)
+  {Note: |char_sub_code(c)| is the true substitution info plus |min_halfword|}
+@#
+@d cur_jfont==equiv(cur_jfont_loc) {pTeX: }
+@d cur_tfont==equiv(cur_tfont_loc)
+@d auto_spacing==equiv(auto_spacing_code)
+@d auto_xspacing==equiv(auto_xspacing_code)
+@d kcat_code(#)==equiv(kcat_code_base+#)
+@d auto_xsp_code(#)==equiv(auto_xsp_code_base+#)
+@d inhibit_xsp_type(#)==eq_type(inhibit_xsp_code_base+#)
+@d inhibit_xsp_code(#)==equiv(inhibit_xsp_code_base+#)
+@d kinsoku_type(#)==eq_type(kinsoku_base+#)
+@d kinsoku_code(#)==equiv(kinsoku_base+#)
+@d kansuji_char(#)==equiv(kansuji_base+#)
+@z
+
+@x [17.232] l.4959 - pTeX: initialize cat_code, cur_jfont, cur_tfont
+cur_font:=null_font; eq_type(cur_font_loc):=data;
+eq_level(cur_font_loc):=level_one;@/
+@y
+cur_font:=null_font; eq_type(cur_font_loc):=data;
+eq_level(cur_font_loc):=level_one;@/
+cur_jfont:=null_font; eq_type(cur_jfont_loc):=data;
+eq_level(cur_jfont_loc):=level_one;@/
+cur_tfont:=null_font; eq_type(cur_tfont_loc):=data;
+eq_level(cur_tfont_loc):=level_one;@/
+@z
+
+@x [17.232] l.4965 - pTeX: initialize cat_code, cur_jfont, cur_tfont
+for k:=0 to 255 do
+  begin cat_code(k):=other_char; math_code(k):=hi(k); sf_code(k):=1000;
+  end;
+@y
+eqtb[auto_spacing_code]:=eqtb[cat_code_base];
+eqtb[auto_xspacing_code]:=eqtb[cat_code_base];
+for k:=0 to 255 do
+  begin cat_code(k):=other_char; kcat_code(k):=other_kchar;
+  math_code(k):=hi(k); sf_code(k):=1000;
+  auto_xsp_code(k):=0; inhibit_xsp_code(k):=0; inhibit_xsp_type(k):=0;
+  kinsoku_code(k):=0; kinsoku_type(k):=0;
+  end;
+@z
+@x [17.232] l.4971 - pTeX: initialize cat_code, cur_jfont, cur_tfont
+for k:="0" to "9" do math_code(k):=hi(k+var_code);
+for k:="A" to "Z" do
+  begin cat_code(k):=letter; cat_code(k+"a"-"A"):=letter;@/
+  math_code(k):=hi(k+var_code+@"100);
+  math_code(k+"a"-"A"):=hi(k+"a"-"A"+var_code+@"100);@/
+  lc_code(k):=k+"a"-"A"; lc_code(k+"a"-"A"):=k+"a"-"A";@/
+  uc_code(k):=k; uc_code(k+"a"-"A"):=k;@/
+  sf_code(k):=999;
+  end;
+@y
+for k:="0" to "9" do
+  begin math_code(k):=hi(k+var_code);
+  auto_xsp_code(k):=3;
+  end;
+kansuji_char(0):=toDVI(fromJIS(@"213B));
+kansuji_char(1):=toDVI(fromJIS(@"306C));
+kansuji_char(2):=toDVI(fromJIS(@"4673));
+kansuji_char(3):=toDVI(fromJIS(@"3B30));
+kansuji_char(4):=toDVI(fromJIS(@"3B4D));
+kansuji_char(5):=toDVI(fromJIS(@"385E));
+kansuji_char(6):=toDVI(fromJIS(@"4F3B));
+kansuji_char(7):=toDVI(fromJIS(@"3C37));
+kansuji_char(8):=toDVI(fromJIS(@"482C));
+kansuji_char(9):=toDVI(fromJIS(@"3665));
+for k:="A" to "Z" do
+  begin cat_code(k):=letter; cat_code(k+"a"-"A"):=letter;@/
+  math_code(k):=hi(k+var_code+@"100);
+  math_code(k+"a"-"A"):=hi(k+"a"-"A"+var_code+@"100);@/
+  lc_code(k):=k+"a"-"A"; lc_code(k+"a"-"A"):=k+"a"-"A";@/
+  uc_code(k):=k; uc_code(k+"a"-"A"):=k;@/
+  auto_xsp_code(k):=3; auto_xsp_code(k+"a"-"A"):=3;@/
+  sf_code(k):=999;
+  end;
+@t\hskip10pt@>kcat_code(@"20+1):=other_kchar; {1 ku}
+@t\hskip10pt@>kcat_code(@"20+2):=other_kchar; {2 ku}
+@+@t\1@>for k:=3 to 6 do kcat_code(@"20+k):=kana; {3 ku ... 6 ku}
+@+@t\1@>for k:=7 to 8 do kcat_code(@"20+k):=other_kchar; {7 ku ... 8 ku}
+@+@t\1@>for k:=16 to 84 do kcat_code(@"20+k):=kanji; {16 ku ... 84 ku}
+{ @"20+k = kcatcodekey(fromKUTEN(HILO(k,1)) }
+@z
+
+@x [17.236] l.5092 - pTeX: cur_jfam_code, jchr_widow_penalty
+@d cur_fam_code=44 {current family}
+@d escape_char_code=45 {escape character for token output}
+@d default_hyphen_char_code=46 {value of \.{\\hyphenchar} when a font is loaded}
+@d default_skew_char_code=47 {value of \.{\\skewchar} when a font is loaded}
+@d end_line_char_code=48 {character placed at the right end of the buffer}
+@d new_line_char_code=49 {character that prints as |print_ln|}
+@d language_code=50 {current hyphenation table}
+@d left_hyphen_min_code=51 {minimum left hyphenation fragment size}
+@d right_hyphen_min_code=52 {minimum right hyphenation fragment size}
+@d holding_inserts_code=53 {do not remove insertion nodes from \.{\\box255}}
+@d error_context_lines_code=54 {maximum intermediate line pairs shown}
+@d tex_int_pars=55 {total number of \TeX's integer parameters}
+@#
+@d web2c_int_base=tex_int_pars {base for web2c's integer parameters}
+@d char_sub_def_min_code=web2c_int_base {smallest value in the charsubdef list}
+@d char_sub_def_max_code=web2c_int_base+1 {largest value in the charsubdef list}
+@d tracing_char_sub_def_code=web2c_int_base+2 {traces changes to a charsubdef def}
+@d web2c_int_pars=web2c_int_base+3 {total number of web2c's integer parameters}
+@#
+@d int_pars=web2c_int_pars {total number of integer parameters}
+@d count_base=int_base+int_pars {256 user \.{\\count} registers}
+@y
+@d cur_fam_code=44 {current family}
+@d cur_jfam_code=45 {current kanji family}
+@d escape_char_code=46 {escape character for token output}
+@d default_hyphen_char_code=47 {value of \.{\\hyphenchar} when a font is loaded}
+@d default_skew_char_code=48 {value of \.{\\skewchar} when a font is loaded}
+@d end_line_char_code=49 {character placed at the right end of the buffer}
+@d new_line_char_code=50 {character that prints as |print_ln|}
+@d language_code=51 {current hyphenation table}
+@d left_hyphen_min_code=52 {minimum left hyphenation fragment size}
+@d right_hyphen_min_code=53 {minimum right hyphenation fragment size}
+@d holding_inserts_code=54 {do not remove insertion nodes from \.{\\box255}}
+@d error_context_lines_code=55 {maximum intermediate line pairs shown}
+@d jchr_widow_penalty_code=56
+			{penalty for creating a widow KANJI character line}
+@d char_sub_def_min_code=57 {smallest value in the charsubdef list}
+@d char_sub_def_max_code=58 {largest value in the charsubdef list}
+@d tracing_char_sub_def_code=59 {traces changes to a charsubdef def}
+@d int_pars=60 {total number of integer parameters}
+@d count_base=int_base+int_pars {256 user \.{\\count} registers}
+@z
+
+@x [17.236] l.5167 - pTeX: cur_jfam, |jchr_widow_penalty|
+@d cur_fam==int_par(cur_fam_code)
+@d escape_char==int_par(escape_char_code)
+@y
+@d cur_fam==int_par(cur_fam_code)
+@d cur_jfam==int_par(cur_jfam_code)
+@d escape_char==int_par(escape_char_code)
+@d jchr_widow_penalty==int_par(jchr_widow_penalty_code)
+@z
+
+@x [17.237] l.5244 - pTeX: cur_jfam_code, jchr_window_penalty_code
+new_line_char_code:print_esc("newlinechar");
+@y
+new_line_char_code:print_esc("newlinechar");
+cur_jfam_code:print_esc("jfam");
+jchr_widow_penalty_code:print_esc("jcharwidowpenalty");
+@z
+
+@x [17.238] l.5365 - pTeX: cur_jfam_code, jchr_window_penalty_code
+primitive("newlinechar",assign_int,int_base+new_line_char_code);@/
+@!@:new_line_char_}{\.{\\newlinechar} primitive@>
+@y
+primitive("newlinechar",assign_int,int_base+new_line_char_code);@/
+@!@:new_line_char_}{\.{\\newlinechar} primitive@>
+primitive("jfam",assign_int,int_base+cur_jfam_code);@/
+@!@:cur_jfam_}{\.{\\jfam} primitive@>
+primitive("jcharwidowpenalty",assign_int,int_base+jchr_widow_penalty_code);@/
+@!@:jchr_widow_penalty}{\.{\\jcharwidowpenalty} primitive@>
+@z
+
+@x [17.247] l.5490 - pTeX: kinsoku, t_baseline_shift, y_baseline_shift
+@d h_offset_code=18 {amount of horizontal offset when shipping pages out}
+@d v_offset_code=19 {amount of vertical offset when shipping pages out}
+@d emergency_stretch_code=20 {reduces badnesses on final pass of line-breaking}
+@d dimen_pars=21 {total number of dimension parameters}
+@d scaled_base=dimen_base+dimen_pars
+  {table of 256 user-defined \.{\\dimen} registers}
+@d eqtb_size=scaled_base+255 {largest subscript of |eqtb|}
+@y
+@d h_offset_code=18 {amount of horizontal offset when shipping pages out}
+@d v_offset_code=19 {amount of vertical offset when shipping pages out}
+@d emergency_stretch_code=20 {reduces badnesses on final pass of line-breaking}
+@d t_baseline_shift_code=21 {shift amount when mixing TATE-kumi and Alphabet}
+@d y_baseline_shift_code=22 {shift amount when mixing YOKO-kumi and Alphabet}
+@d dimen_pars=23 {total number of dimension parameters}
+@d scaled_base=dimen_base+dimen_pars
+  {table of 256 user-defined \.{\\dimen} registers}
+@d kinsoku_penalty_base=scaled_base+256 {table of 256 kinsoku registers}
+@d eqtb_size=kinsoku_penalty_base+255 {largest subscript of |eqtb|}
+@z
+
+@x l.5498 - pTeX: kinsoku, t_baseline_shift, y_baseline_shift
+@d dimen(#)==eqtb[scaled_base+#].sc
+@d dimen_par(#)==eqtb[dimen_base+#].sc {a scaled quantity}
+@y
+@d dimen(#)==eqtb[scaled_base+#].sc
+@d dimen_par(#)==eqtb[dimen_base+#].sc {a scaled quantity}
+@d kinsoku_penalty(#)==eqtb[kinsoku_penalty_base+#].int
+@z
+
+@x l.5518 - pTeX:
+@d h_offset==dimen_par(h_offset_code)
+@d v_offset==dimen_par(v_offset_code)
+@y
+@d h_offset==dimen_par(h_offset_code)
+@d v_offset==dimen_par(v_offset_code)
+@d t_baseline_shift==dimen_par(t_baseline_shift_code)
+@d y_baseline_shift==dimen_par(y_baseline_shift_code)
+@z
+
+@x l.5542 - pTeX:
+h_offset_code:print_esc("hoffset");
+v_offset_code:print_esc("voffset");
+emergency_stretch_code:print_esc("emergencystretch");
+othercases print("[unknown dimen parameter!]")
+@y
+h_offset_code:print_esc("hoffset");
+v_offset_code:print_esc("voffset");
+t_baseline_shift_code:print_esc("tbaselineshift");
+y_baseline_shift_code:print_esc("ybaselineshift");
+emergency_stretch_code:print_esc("emergencystretch");
+othercases print("[unknown dimen parameter!]")
+@z
+
+@x [17.248] l.5588 - pTeX: rotate offset
+primitive("hoffset",assign_dimen,dimen_base+h_offset_code);@/
+@!@:h_offset_}{\.{\\hoffset} primitive@>
+primitive("voffset",assign_dimen,dimen_base+v_offset_code);@/
+@!@:v_offset_}{\.{\\voffset} primitive@>
+@y
+primitive("hoffset",assign_dimen,dimen_base+h_offset_code);@/
+@!@:h_offset_}{\.{\\hoffset} primitive@>
+primitive("voffset",assign_dimen,dimen_base+v_offset_code);@/
+@!@:v_offset_}{\.{\\voffset} primitive@>
+primitive("tbaselineshift",assign_dimen,dimen_base+t_baseline_shift_code);@/
+@!@:t_baseline_shift_}{\.{\\tbaselineshift} primitive@>
+primitive("ybaselineshift",assign_dimen,dimen_base+y_baseline_shift_code);@/
+@!@:y_baseline_shift_}{\.{\\ybaselineshift} primitive@>
+@z
+
+@x [17.252] l.5622 - pTeX: show eqtb
+else if n<=eqtb_size then @<Show equivalent |n|, in region 6@>
+else print_char("?"); {this can't happen either}
+end;
+tats
+@y
+else if n<kinsoku_penalty_base then @<Show equivalent |n|, in region 6@>
+else if n<=eqtb_size then print("kinsoku")
+else print_char("?"); {this can't happen either}
+end;
+tats
+@z
+
+@x [18.265] l.5903 - pTeX: \jfont \tfont
+primitive("font",def_font,0);@/
+@!@:font_}{\.{\\font} primitive@>
+@y
+primitive("font",def_font,0);@/
+@!@:font_}{\.{\\font} primitive@>
+primitive("jfont",def_jfont,0);@/
+@!@:jfont_}{\.{\\jfont} primitive@>
+primitive("tfont",def_tfont,0);@/
+@!@:tfont_}{\.{\\tfont} primitive@>
+@z
+
+@x [18.266] l.5979 - pTeX: \jfont, \tfont
+def_font: print_esc("font");
+@y
+def_font: print_esc("font");
+def_jfont: print_esc("jfont");
+def_tfont: print_esc("tfont");
+@z
+
+@x [20.289] l.6387 - pTeX: cs_token_flag
+@d cs_token_flag==@'7777 {amount added to the |eqtb| location in a
+  token that stands for a control sequence; is a multiple of~256, less~1}
+@y
+@d cs_token_flag==@"FFFF {amount added to the |eqtb| location in a
+token that stands for a control sequence; is a multiple of~256, less~1}
+@z
+
+@x [20.293] l.6496 - pTeX: show_token_list
+@ @<Display token |p|...@>=
+if (p<hi_mem_min) or (p>mem_end) then
+  begin print_esc("CLOBBERED."); return;
+@.CLOBBERED@>
+  end;
+if info(p)>=cs_token_flag then print_cs(info(p)-cs_token_flag)
+else  begin m:=info(p) div @'400; c:=info(p) mod @'400;
+  if info(p)<0 then print_esc("BAD.")
+@.BAD@>
+  else @<Display the token $(|m|,|c|)$@>;
+  end
+@y
+@ @<Display token |p|...@>=
+if (p<hi_mem_min) or (p>mem_end) then
+  begin print_esc("CLOBBERED."); return;
+@.CLOBBERED@>
+  end;
+if info(p)>=cs_token_flag then print_cs(info(p)-cs_token_flag) {wchar_token}
+else  begin
+  if check_kanji(info(p)) then {wchar_token}
+    begin m:=kcat_code(kcatcodekey(info(p))); c:=info(p);
+    end
+  else  begin m:=Hi(info(p)); c:=Lo(info(p));
+    end;
+  if (m<kanji)and(c>256) then print_esc("BAD.")
+@.BAD@>
+  else @<Display the token $(|m|,|c|)$@>;
+end
+@z
+
+@x [20.294] l.6512 - pTeX: show_token_list
+@<Display the token ...@>=
+case m of
+left_brace,right_brace,math_shift,tab_mark,sup_mark,sub_mark,spacer,
+  letter,other_char: print(c);
+@y
+@<Display the token ...@>=
+case m of
+kanji,kana,other_kchar: print_kanji(KANJI(c));
+left_brace,right_brace,math_shift,tab_mark,sup_mark,sub_mark,spacer,
+  letter,other_char: print(c);
+@z
+
+@x [21.298] l.6632 - pTeX: print KANJI
+other_char: chr_cmd("the character ");
+@y
+other_char: chr_cmd("the character ");
+kanji,kana,other_kchar: begin print("kanji character ");
+  print_kanji(KANJI(chr_code)); end;
+@z
+
+@x [22.303] l.6726 - pTeX: state mid_kanji
+1) |state=mid_line| is the normal state.\cr
+2) |state=skip_blanks| is like |mid_line|, but blanks are ignored.\cr
+3) |state=new_line| is the state at the beginning of a line.\cr}}$$
+@y
+1) |state=mid_line| is the normal state.\cr
+2) |state=mid_kanji| is like |mid_line|, and internal KANJI string.\cr
+3) |state=skip_blanks| is like |mid_line|, but blanks are ignored.\cr
+4) |state=new_line| is the state at the beginning of a line.\cr}}$$
+@z
+
+@x [22.303] l.6736 - pTeX: state mid_kanji
+@d mid_line=1 {|state| code when scanning a line of characters}
+@d skip_blanks=2+max_char_code {|state| code when ignoring blanks}
+@d new_line=3+max_char_code+max_char_code {|state| code at start of line}
+@y
+@d mid_line=1 {|state| code when scanning a line of characters}
+@d mid_kanji=2+max_char_code {|state| code when scanning a line of characters}
+@d skip_blanks=3+max_char_code+max_char_code {|state| code when ignoring blanks}
+@d new_line=4+max_char_code+max_char_code+max_char_code
+   {|state| code at start of line}
+@z
+
+@x [22.311] l.6986 - pTeX: label
+@p procedure show_context; {prints where the scanner is}
+label done;
+var old_setting:0..max_selector; {saved |selector| setting}
+@y
+@p procedure show_context; {prints where the scanner is}
+label done, done1;
+var old_setting:0..max_selector; {saved |selector| setting}
+@!s: pointer; {temporary pointer}
+@z
+
+@x [22.316] l.7110 - pTeX: init kcode_pos
+@d begin_pseudoprint==
+  begin l:=tally; tally:=0; selector:=pseudo;
+  trick_count:=1000000;
+  end
+@y
+@d begin_pseudoprint==
+  begin l:=tally; tally:=0; selector:=pseudo; kcode_pos:=0;
+  trick_count:=1000000;
+  end
+@z
+@x [22.316] l.7114 - pTeX: kcode_pos
+@d set_trick_count==
+  begin first_count:=tally;
+  trick_count:=tally+1+error_line-half_error_line;
+  if trick_count<error_line then trick_count:=error_line;
+  end
+@y
+@d set_trick_count==
+  begin first_count:=tally;
+  if (first_count>0)and(trick_buf2[(first_count-1)mod error_line]=1) then
+      incr(first_count);
+  trick_count:=first_count+1+error_line-half_error_line;
+  if trick_count<error_line then trick_count:=error_line;
+  end
+@z
+
+@x [22.317] l.7133 - pTeX: adjust kanji code pos
+for q:=p to first_count-1 do print_char(trick_buf[q mod error_line]);
+print_ln;
+for q:=1 to n do print_char(" "); {print |n| spaces to begin line~2}
+if m+n<=error_line then p:=first_count+m else p:=first_count+(error_line-n-3);
+@y
+if trick_buf2[p mod error_line]=2 then
+  begin p:=p+1; n:=n-1;
+  end;
+for q:=p to first_count-1 do print_char(trick_buf[q mod error_line]);
+print_ln;
+for q:=1 to n do print_char(" "); {print |n| spaces to begin line~2}
+if m+n<=error_line then p:=first_count+m else p:=first_count+(error_line-n-3);
+if trick_buf2[(p-1) mod error_line]=1 then p:=p-1;
+@z
+
+@x [22.319] l.7157 - pTeX: adjust kanji code token
+@ @<Pseudoprint the token list@>=
+begin_pseudoprint;
+if token_type<macro then show_token_list(start,loc,100000)
+else show_token_list(link(start),loc,100000) {avoid reference count}
+@y
+@ @<Pseudoprint the token list@>=
+begin_pseudoprint;
+if token_type<macro then
+  begin  if (token_type=backed_up)and(loc<>null) then
+    begin  if (link(start)=null)and(check_kanji(info(start))) then {wchar_token}
+      begin cur_input:=input_stack[base_ptr-1];
+      s:=get_avail; info(s):=Lo(buffer[loc]);
+      cur_input:=input_stack[base_ptr];
+      link(start):=s;
+      show_token_list(start,loc,100000);
+      free_avail(s);link(start):=null;
+      goto done1;
+      end;
+    end;
+  show_token_list(start,loc,100000);
+  end
+else show_token_list(link(start),loc,100000); {avoid reference count}
+done1:
+@z
+
+@x [24.341] l.7479 - pTeX: set last_chr
+@!cat:0..max_char_code; {|cat_code(cur_chr)|, usually}
+@y
+@!cat:escape..max_char_code; {|cat_code(cur_chr)|, usually}
+@!l:0..buf_size; {temporary index into |buffer|}
+@z
+
+@x [24.343] l.7500 - pTeX: input external file
+@ @<Input from external file, |goto restart| if no input found@>=
+@^inner loop@>
+begin switch: if loc<=limit then {current line not yet finished}
+  begin cur_chr:=buffer[loc]; incr(loc);
+  reswitch: cur_cmd:=cat_code(cur_chr);
+@y
+@ @<Input from external file, |goto restart| if no input found@>=
+@^inner loop@>
+begin switch: if loc<=limit then {current line not yet finished}
+  begin cur_chr:=buffer[loc]; incr(loc);
+    if (multistrlen(buffer, limit+1, loc-1)=2) then
+      begin cur_chr:=fromBUFF(buffer, limit+1, loc-1);
+      cur_cmd:=kcat_code(kcatcodekey(cur_chr));
+      incr(loc);
+      end
+    else reswitch: cur_cmd:=cat_code(cur_chr);
+@z
+
+@x [24.344] l.7535 - pTeX: ASCII-KANJI space handling
+@d any_state_plus(#) == mid_line+#,skip_blanks+#,new_line+#
+@y
+@d any_state_plus(#) == mid_line+#,mid_kanji+#,skip_blanks+#,new_line+#
+@z
+
+@x [24.347] l.7569 - pTeX: scaner
+@ @d add_delims_to(#)==#+math_shift,#+tab_mark,#+mac_param,
+  #+sub_mark,#+letter,#+other_char
+@y
+@ @d add_delims_to(#)==#+math_shift,#+tab_mark,#+mac_param,
+  #+sub_mark,#+letter,#+other_char
+@d all_jcode(#)==#+kanji,#+kana,#+other_kchar
+@z
+
+@x [24.347] l.7573 - pTeX: scaner
+mid_line+spacer:@<Enter |skip_blanks| state, emit a space@>;
+mid_line+car_ret:@<Finish line, emit a space@>;
+skip_blanks+car_ret,any_state_plus(comment):
+  @<Finish line, |goto switch|@>;
+new_line+car_ret:@<Finish line, emit a \.{\\par}@>;
+mid_line+left_brace: incr(align_state);
+skip_blanks+left_brace,new_line+left_brace: begin
+  state:=mid_line; incr(align_state);
+  end;
+mid_line+right_brace: decr(align_state);
+skip_blanks+right_brace,new_line+right_brace: begin
+  state:=mid_line; decr(align_state);
+  end;
+add_delims_to(skip_blanks),add_delims_to(new_line): state:=mid_line;
+@y
+mid_kanji+spacer,mid_line+spacer:@<Enter |skip_blanks| state, emit a space@>;
+mid_line+car_ret:@<Finish line, emit a space@>;
+mid_kanji+car_ret: if skip_mode then @<Finish line, |goto switch|@>
+  else @<Finish line, emit a space@>;
+skip_blanks+car_ret,any_state_plus(comment):
+  @<Finish line, |goto switch|@>;
+new_line+car_ret:@<Finish line, emit a \.{\\par}@>;
+mid_line+left_brace,mid_kanji+left_brace: incr(align_state);
+skip_blanks+left_brace,new_line+left_brace: begin
+  state:=mid_line; incr(align_state);
+  end;
+mid_line+right_brace,mid_kanji+right_brace: decr(align_state);
+skip_blanks+right_brace,new_line+right_brace: begin
+  state:=mid_line; decr(align_state);
+  end;
+add_delims_to(skip_blanks),add_delims_to(new_line),add_delims_to(mid_kanji):
+  state:=mid_line;
+all_jcode(skip_blanks),all_jcode(new_line),all_jcode(mid_line):
+  state:=mid_kanji;
+
+@ @<Global...@>=
+skip_mode:boolean;
+
+@ @<Set init...@>=
+skip_mode:=true;
+@z
+
+@x [24.354] l.7659 - pTeX: scan control sequence
+@<Scan a control...@>=
+begin if loc>limit then cur_cs:=null_cs {|state| is irrelevant in this case}
+else  begin start_cs: k:=loc; cur_chr:=buffer[k]; cat:=cat_code(cur_chr);
+  incr(k);
+  if cat=letter then state:=skip_blanks
+  else if cat=spacer then state:=skip_blanks
+  else state:=mid_line;
+  if (cat=letter)and(k<=limit) then
+    @<Scan ahead in the buffer until finding a nonletter;
+    if an expanded code is encountered, reduce it
+    and |goto start_cs|; otherwise if a multiletter control
+    sequence is found, adjust |cur_cs| and |loc|, and
+    |goto found|@>
+  else @<If an expanded code is present, reduce it and |goto start_cs|@>;
+  cur_cs:=single_base+buffer[loc]; incr(loc);
+  end;
+found: cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
+if cur_cmd>=outer_call then check_outer_validity;
+end
+@y
+@<Scan a control...@>=
+begin if loc>limit then cur_cs:=null_cs {|state| is irrelevant in this case}
+else  begin k:=loc; cur_chr:=buffer[k]; incr(k);
+  if (multistrlen(buffer, limit+1, k-1)=2) then
+    begin cat:=kcat_code(kcatcodekey(fromBUFF(buffer, limit+1, k-1))); incr(k);
+    end
+  else cat:=cat_code(cur_chr);
+start_cs:
+  if (cat=letter)or(cat=kanji)or(cat=kana) then state:=skip_blanks
+  else if cat=spacer then state:=skip_blanks
+  else state:=mid_line;
+  if cat=other_kchar then
+    begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
+    end
+  else if ((cat=letter)or(cat=kanji)or(cat=kana))and(k<=limit) then
+    @<Scan ahead in the buffer until finding a nonletter;
+    if an expanded code is encountered, reduce it
+    and |goto start_cs|; otherwise if a multiletter control
+    sequence is found, adjust |cur_cs| and |loc|, and
+    |goto found|@>
+  else @<If an expanded code is present, reduce it and |goto start_cs|@>;
+  cur_cs:=single_base+buffer[loc]; incr(loc);
+  end;
+found: cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
+if cur_cmd>=outer_call then check_outer_validity;
+end
+@z
+
+@x
+@<If an expanded...@>=
+begin if buffer[k]=cur_chr then @+if cat=sup_mark then @+if k<limit then
+  begin c:=buffer[k+1]; @+if c<@'200 then {yes, one is indeed present}
+    begin d:=2;
+    if is_hex(c) then @+if k+2<=limit then
+      begin cc:=buffer[k+2]; @+if is_hex(cc) then incr(d);
+      end;
+    if d>2 then
+      begin hex_to_cur_chr; buffer[k-1]:=cur_chr;
+      end
+    else if c<@'100 then buffer[k-1]:=c+@'100
+    else buffer[k-1]:=c-@'100;
+    limit:=limit-d; first:=first-d;
+    while k<=limit do
+      begin buffer[k]:=buffer[k+d]; incr(k);
+      end;
+    goto start_cs;
+    end;
+  end;
+end
+@y
+@<If an expanded...@>=
+begin if buffer[k]=cur_chr then @+if cat=sup_mark then @+if k<limit then
+  begin c:=buffer[k+1]; @+if c<@'200 then {yes, one is indeed present}
+    begin d:=2;
+    if is_hex(c) then @+if k+2<=limit then
+      begin cc:=buffer[k+2]; @+if is_hex(cc) then incr(d);
+      end;
+    if d>2 then
+      begin hex_to_cur_chr; buffer[k-1]:=cur_chr;
+      end
+    else if c<@'100 then buffer[k-1]:=c+@'100
+    else buffer[k-1]:=c-@'100;
+    limit:=limit-d; first:=first-d;
+    l:=k; cur_chr:=buffer[k-1]; cat:=cat_code(cur_chr);
+    while l<=limit do
+      begin buffer[l]:=buffer[l+d]; incr(l);
+      end;
+    goto start_cs;
+    end;
+  end;
+end
+@z
+
+@x [24.356] l.7727 - pTeX: scan control sequence (cont)
+@ @<Scan ahead in the buffer...@>=
+begin repeat cur_chr:=buffer[k]; cat:=cat_code(cur_chr); incr(k);
+until (cat<>letter)or(k>limit);
+@<If an expanded...@>;
+if cat<>letter then decr(k);
+  {now |k| points to first nonletter}
+if k>loc+1 then {multiletter control sequence has been scanned}
+  begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
+  end;
+end
+@y
+@ @<Scan ahead in the buffer...@>=
+begin repeat cur_chr:=buffer[k]; incr(k);
+  if (multistrlen(buffer, limit+1, k-1)=2) then
+    begin cat:=kcat_code(kcatcodekey(fromBUFF(buffer, limit+1, k-1))); incr(k);
+    end
+  else cat:=cat_code(cur_chr);
+  while (buffer[k]=cur_chr)and(cat=sup_mark)and(k<limit) do
+    begin c:=buffer[k+1]; @+if c<@'200 then {yes, one is indeed present}
+      begin d:=2;
+      if is_hex(c) then @+if k+2<=limit then
+        begin cc:=buffer[k+2]; @+if is_hex(cc) then incr(d);
+        end;
+      if d>2 then
+        begin hex_to_cur_chr;
+        end
+      else if c<@'100 then cur_chr:=c+@'100
+      else cur_chr:=c-@'100;
+      cat:=cat_code(cur_chr);
+      if (cat=letter)or(cat=sup_mark) then
+        begin buffer[k-1]:=cur_chr;
+        limit:=limit-d; first:=first-d;
+        l:=k;
+        while l<=limit do
+          begin buffer[l]:=buffer[l+d]; incr(l);
+          end;
+        end;
+      end;
+    end;
+until not((cat=letter)or(cat=kanji)or(cat=kana))or(k>limit);
+{@@<If an expanded...@@>;}
+if not((cat=letter)or(cat=kanji)or(cat=kana)) then decr(k);
+if cat=other_kchar then decr(k); {now |k| points to first nonletter}
+if k>loc+1 then {multiletter control sequence has been scanned}
+  begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
+  end;
+end
+@z
+
+@x [24.357] l.7771 - pTeX: input from token list
+@<Input from token list, |goto restart| if end of list or
+  if a parameter needs to be expanded@>=
+if loc<>null then {list not exhausted}
+@^inner loop@>
+  begin t:=info(loc); loc:=link(loc); {move to next}
+  if t>=cs_token_flag then {a control sequence token}
+    begin cur_cs:=t-cs_token_flag;
+    cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
+    if cur_cmd>=outer_call then
+      if cur_cmd=dont_expand then
+        @<Get the next token, suppressing expansion@>
+      else check_outer_validity;
+    end
+  else  begin cur_cmd:=t div @'400; cur_chr:=t mod @'400;
+    case cur_cmd of
+    left_brace: incr(align_state);
+    right_brace: decr(align_state);
+    out_param: @<Insert macro parameter and |goto restart|@>;
+    othercases do_nothing
+    endcases;
+    end;
+  end
+else  begin {we are done with this token list}
+  end_token_list; goto restart; {resume previous level}
+  end
+@y
+@<Input from token list, |goto restart| if end of list or
+  if a parameter needs to be expanded@>=
+if loc<>null then {list not exhausted}
+@^inner loop@>
+  begin t:=info(loc); loc:=link(loc); {move to next}
+  if t>=cs_token_flag then {a control sequence token}
+    begin cur_cs:=t-cs_token_flag;
+    cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
+    if cur_cmd>=outer_call then
+      if cur_cmd=dont_expand then
+        @<Get the next token, suppressing expansion@>
+      else check_outer_validity;
+    end
+  else if check_kanji(t) then {wchar_token}
+    begin cur_chr:=t; cur_cmd:=kcat_code(kcatcodekey(t));
+    end
+  else
+    begin cur_cmd:=Hi(t); cur_chr:=Lo(t);
+    case cur_cmd of
+    left_brace: incr(align_state);
+    right_brace: decr(align_state);
+    out_param: @<Insert macro parameter and |goto restart|@>;
+    othercases do_nothing
+    endcases;
+    end;
+  end
+else  begin {we are done with this token list}
+  end_token_list; goto restart; {resume previous level}
+  end
+@z
+
+@x [24.365] l.7935 - pTeX: get_token
+@p procedure get_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|}
+begin no_new_control_sequence:=false; get_next; no_new_control_sequence:=true;
+@^inner loop@>
+if cur_cs=0 then cur_tok:=(cur_cmd*@'400)+cur_chr
+else cur_tok:=cs_token_flag+cur_cs;
+end;
+@y
+@p procedure get_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|}
+begin no_new_control_sequence:=false; get_next; no_new_control_sequence:=true;
+@^inner loop@>
+if cur_cs=0 then
+  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {wchar_token}
+    cur_tok:=cur_chr
+  else cur_tok:=(cur_cmd*@'400)+cur_chr
+else cur_tok:=cs_token_flag+cur_cs;
+end;
+@z
+
+@x [25.374] l.8073 - pTeX: get_chr
+@ @<Look up the characters of list |r| in the hash table...@>=
+j:=first; p:=link(r);
+while p<>null do
+  begin if j>=max_buf_stack then
+    begin max_buf_stack:=j+1;
+    if max_buf_stack=buf_size then
+      overflow("buffer size",buf_size);
+@:TeX capacity exceeded buffer size}{\quad buffer size@>
+    end;
+  buffer[j]:=info(p) mod @'400; incr(j); p:=link(p);
+  end;
+@y
+@ @<Look up the characters of list |r| in the hash table...@>=
+j:=first; p:=link(r);
+while p<>null do
+  begin if j>=max_buf_stack then
+    begin max_buf_stack:=j+1;
+    if max_buf_stack=buf_size then
+      overflow("buffer size",buf_size);
+@:TeX capacity exceeded buffer size}{\quad buffer size@>
+    end;
+  if check_kanji(info(p)) then {wchar_token}
+    begin buffer[j]:=Hi(info(p)); incr(j);
+    end;
+  buffer[j]:=Lo(info(p)); incr(j); p:=link(p);
+  end;
+@z
+
+@x [25.380] l.8221 - pTeX: get_x_token
+@p procedure get_x_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|,
+  and expands macros}
+label restart,done;
+begin restart: get_next;
+@^inner loop@>
+if cur_cmd<=max_command then goto done;
+if cur_cmd>=call then
+  if cur_cmd<end_template then macro_call
+  else  begin cur_cs:=frozen_endv; cur_cmd:=endv;
+    goto done; {|cur_chr=null_list|}
+    end
+else expand;
+goto restart;
+done: if cur_cs=0 then cur_tok:=(cur_cmd*@'400)+cur_chr
+else cur_tok:=cs_token_flag+cur_cs;
+end;
+@y
+@p procedure get_x_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|,
+  and expands macros}
+label restart,done;
+begin restart: get_next;
+@^inner loop@>
+if cur_cmd<=max_command then goto done;
+if cur_cmd>=call then
+  if cur_cmd<end_template then macro_call
+  else  begin cur_cs:=frozen_endv; cur_cmd:=endv;
+    goto done; {|cur_chr=null_list|}
+    end
+else expand;
+goto restart;
+done: if cur_cs=0 then
+  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+    cur_tok:=cur_chr
+  else cur_tok:=(cur_cmd*@'400)+cur_chr
+else cur_tok:=cs_token_flag+cur_cs;
+end;
+@z
+
+@x [25.381] l.8151 - pTeX: x_token
+@p procedure x_token; {|get_x_token| without the initial |get_next|}
+begin while cur_cmd>max_command do
+  begin expand;
+  get_next;
+  end;
+if cur_cs=0 then cur_tok:=(cur_cmd*@'400)+cur_chr
+else cur_tok:=cs_token_flag+cur_cs;
+@y
+@p procedure x_token; {|get_x_token| without the initial |get_next|}
+begin while cur_cmd>max_command do
+  begin expand;
+  get_next;
+  end;
+if cur_cs=0 then
+  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+    cur_tok:=cur_chr
+  else cur_tok:=(cur_cmd*@'400)+cur_chr
+else cur_tok:=cs_token_flag+cur_cs;
+@z
+
+@x [26.413] l.8659 - pTeX: scan_somthing_internal
+@p procedure scan_something_internal(@!level:small_number;@!negative:boolean);
+@y
+@p @t\4@>@<Declare procedures needed in |scan_something|@>@t@>@/
+procedure scan_something_internal(@!level:small_number;@!negative:boolean);
+@z
+@x [26.413] l.8663 - pTeX: scan_somthing_internal
+begin m:=cur_chr;
+case cur_cmd of
+def_code: @<Fetch a character code from some table@>;
+toks_register,assign_toks,def_family,set_font,def_font: @<Fetch a token list or
+  font identifier, provided that |level=tok_val|@>;
+@y
+@!q:pointer;
+begin m:=cur_chr;
+case cur_cmd of
+assign_kinsoku: @<Fetch breaking penalty from some table@>;
+assign_inhibit_xsp_code: @<Fetch inhibit type from some table@>;
+def_code: @<Fetch a character code from some table@>;
+toks_register,assign_toks,def_family,set_font,def_font,def_jfont,def_tfont:
+  @<Fetch a token list or font identifier, provided that |level=tok_val|@>;
+@z
+
+@x [26.414] l.8693 - pTeX:
+if m=math_code_base then scanned_result(ho(math_code(cur_val)))(int_val)
+else if m<math_code_base then scanned_result(equiv(m+cur_val))(int_val)
+else scanned_result(eqtb[m+cur_val].int)(int_val);
+@y
+if m=math_code_base then scanned_result(ho(math_code(cur_val)))(int_val)
+else if m=kcat_code_base then scanned_result(equiv(m+kcatcodekey(cur_val)))(int_val)
+else if m<math_code_base then
+  begin if is_kanji(cur_val) then
+  scanned_result(equiv(m+Hi(cur_val)))(int_val)
+  else scanned_result(equiv(m+cur_val))(int_val)
+  end
+else scanned_result(eqtb[m+cur_val].int)(int_val);
+@z
+
+@x [26.420] l.8799 - pTeX: Fetch a box dimension: dir_node
+if box(cur_val)=null then cur_val:=0 @+else cur_val:=mem[box(cur_val)+m].sc;
+@y
+if box(cur_val)=null then cur_val:=0
+else
+   begin q:=box(cur_val);
+  while (q<>null)and(box_dir(q)<>abs(direction)) do q:=link(q);
+  if q=null then
+    begin q:=new_dir_node(box(cur_val),abs(direction));
+    cur_val:=mem[q+m].sc;
+    delete_glue_ref(space_ptr(q)); delete_glue_ref(xspace_ptr(q));
+    free_node(q,box_node_size);
+    end
+  else cur_val:=mem[q+m].sc;
+  end;
+@z
+
+@x [26.435] l.8940 - pTeX: scan_char_num
+procedure scan_char_num;
+begin scan_int;
+if (cur_val<0)or(cur_val>255) then
+  begin print_err("Bad character code");
+@.Bad character code@>
+  help2("A character number must be between 0 and 255.")@/
+    ("I changed this one to zero."); int_error(cur_val); cur_val:=0;
+  end;
+end;
+@y
+procedure scan_char_num;
+begin scan_int;
+if (not is_char_ascii(cur_val))and(not check_kanji(cur_val)) then {wchar_token}
+  begin print_err("Bad character code");
+@.Bad character code@>
+  help2("A character number must be between 0 and 255, or KANJI code.")@/
+    ("I changed this one to zero."); int_error(cur_val); cur_val:=0;
+  end;
+end;
+@z
+
+@x [26.442] l.9045 - pTeX: KANJI character scanning
+@<Scan an alphabetic character code into |cur_val|@>=
+begin get_token; {suppress macro expansion}
+if cur_tok<cs_token_flag then
+  begin cur_val:=cur_chr;
+  if cur_cmd<=right_brace then
+    if cur_cmd=right_brace then incr(align_state)
+    else decr(align_state);
+  end
+else if cur_tok<cs_token_flag+single_base then
+  cur_val:=cur_tok-cs_token_flag-active_base
+else cur_val:=cur_tok-cs_token_flag-single_base;
+if cur_val>255 then
+  begin print_err("Improper alphabetic constant");
+@.Improper alphabetic constant@>
+  help2("A one-character control sequence belongs after a ` mark.")@/
+    ("So I'm essentially inserting \0 here.");
+  cur_val:="0"; back_error;
+  end
+else @<Scan an optional space@>;
+end
+@y
+@<Scan an alphabetic character code into |cur_val|@>=
+begin get_token; {suppress macro expansion}
+if cur_tok<cs_token_flag then
+  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {wchar_token}
+    begin skip_mode:=false; cur_val:=tonum(cur_chr);
+    end
+  else begin cur_val:=cur_chr;
+  if cur_cmd<=right_brace then
+    if cur_cmd=right_brace then incr(align_state)
+    else decr(align_state);
+  end
+else if cur_tok<cs_token_flag+single_base then
+  cur_val:=cur_tok-cs_token_flag-active_base
+else cur_val:=cur_tok-cs_token_flag-single_base;
+if (cur_val>255)and(cur_cmd<kanji) then
+  begin print_err("Improper alphabetic or KANJI constant");
+@.Improper alphabetic constant@>
+  help2("A one-character control sequence belongs after a ` mark.")@/
+    ("So I'm essentially inserting \0 here.");
+  cur_val:="0"; back_error;
+  end
+else @<Scan an optional space@>;
+skip_mode:=true;
+end
+@z
+
+@x [26.455] l.9288 - pTeX: zw, zh: zenkaku width & height
+if scan_keyword("em") then v:=(@<The em width for |cur_font|@>)
+@.em@>
+else if scan_keyword("ex") then v:=(@<The x-height for |cur_font|@>)
+@.ex@>
+else goto not_found;
+@y
+if scan_keyword("em") then v:=(@<The em width for |cur_font|@>)
+@.em@>
+else if scan_keyword("ex") then v:=(@<The x-height for |cur_font|@>)
+@.ex@>
+else if scan_keyword("zw") then @<The KANJI width for |cur_jfont|@>
+@.ze@>
+else if scan_keyword("zh") then @<The KANJI height for |cur_jfont|@>
+@.zh@>
+else goto not_found;
+@z
+
+@x [26.458] l.9345 - pTeX: dimension unit: Q, H (1/4 mm)
+else if scan_keyword("sp") then goto done
+@.sp@>
+@y
+else if scan_keyword("H") then set_conversion(7227)(10160)
+@.H@>
+else if scan_keyword("Q") then set_conversion(7227)(10160)
+@.Q@>
+else if scan_keyword("sp") then goto done
+@.sp@>
+@z
+
+@x [27.464] l.9475 - pTeX: str_toks
+  if t=" " then t:=space_token
+  else t:=other_token+t;
+@y
+  if (multistrlen(str_pool, pool_ptr, k)=2) then
+    begin t:=fromBUFF(str_pool, pool_ptr, k); incr(k);
+    end
+  else if t=" " then t:=space_token
+  else t:=other_token+t;
+@z
+
+@x [27.468] l.9531 - pTeX: convert KANJI code
+@d number_code=0 {command code for \.{\\number}}
+@d roman_numeral_code=1 {command code for \.{\\romannumeral}}
+@d string_code=2 {command code for \.{\\string}}
+@d meaning_code=3 {command code for \.{\\meaning}}
+@d font_name_code=4 {command code for \.{\\fontname}}
+@d job_name_code=5 {command code for \.{\\jobname}}
+@y
+@d number_code=0 {command code for \.{\\number}}
+@d roman_numeral_code=1 {command code for \.{\\romannumeral}}
+@d kansuji_code=2 {command code for \.{\\kansuji}}
+@d string_code=3 {command code for \.{\\string}}
+@d meaning_code=4 {command code for \.{\\meaning}}
+@d font_name_code=5 {command code for \.{\\fontname}}
+@d euc_code=6 {command code for \.{\\euc}}
+@d sjis_code=7 {command code for \.{\\sjis}}
+@d jis_code=8 {command code for \.{\\jis}}
+@d kuten_code=9 {command code for \.{\\kuten}}
+@d job_name_code=10 {command code for \.{\\jobname}}
+@z
+
+@x [27.468] l.9547 - pTeX:
+primitive("fontname",convert,font_name_code);@/
+@!@:font_name_}{\.{\\fontname} primitive@>
+@y
+primitive("fontname",convert,font_name_code);@/
+@!@:font_name_}{\.{\\fontname} primitive@>
+primitive("kansuji",convert,kansuji_code);
+@!@:kansuji_}{\.{\\kansuji} primitive@>
+primitive("euc",convert,euc_code);
+@!@:euc_}{\.{\\euc} primitive@>
+primitive("sjis",convert,sjis_code);
+@!@:sjis_}{\.{\\sjis} primitive@>
+primitive("jis",convert,jis_code);
+@!@:jis_}{\.{\\jis} primitive@>
+primitive("kuten",convert,kuten_code);
+@!@:kuten_}{\.{\\kuten} primitive@>
+@z
+
+@x [27.469] l.9558 - pTeX:
+  font_name_code: print_esc("fontname");
+@y
+  font_name_code: print_esc("fontname");
+  kansuji_code: print_esc("kansuji");
+  euc_code:print_esc("euc");
+  sjis_code:print_esc("sjis");
+  jis_code:print_esc("jis");
+  kuten_code:print_esc("kuten");
+@z
+
+@x [27.470] l.9566 - pTeX: convert KANJI code continue
+@p procedure conv_toks;
+var old_setting:0..max_selector; {holds |selector| setting}
+@y
+@p procedure conv_toks;
+var old_setting:0..max_selector; {holds |selector| setting}
+@!cx:KANJI_code; {temporary register for KANJI}
+@z
+
+@x [27.471] l.9577 - pTeX: convert KANJI code continue
+@ @<Scan the argument for command |c|@>=
+case c of
+number_code,roman_numeral_code: scan_int;
+string_code, meaning_code: begin save_scanner_status:=scanner_status;
+  scanner_status:=normal; get_token; scanner_status:=save_scanner_status;
+  end;
+@y
+@ @<Scan the argument for command |c|@>=
+KANJI(cx):=0;
+case c of
+number_code,roman_numeral_code,
+kansuji_code,euc_code,sjis_code,jis_code,kuten_code: scan_int;
+string_code, meaning_code: begin save_scanner_status:=scanner_status;
+  scanner_status:=normal; get_token;
+  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {wchar_token}
+    KANJI(cx):=cur_tok;
+  scanner_status:=save_scanner_status;
+  end;
+@z
+
+@x [27.471] l.9587 - pTeX: convert KANJI code continue
+@ @<Print the result of command |c|@>=
+case c of
+number_code: print_int(cur_val);
+roman_numeral_code: print_roman_int(cur_val);
+string_code:if cur_cs<>0 then sprint_cs(cur_cs)
+  else print_char(cur_chr);
+@y
+@ @<Print the result of command |c|@>=
+case c of
+number_code: print_int(cur_val);
+roman_numeral_code: print_roman_int(cur_val);
+jis_code:   print_int(fromJIS(cur_val));
+euc_code:   print_int(fromEUC(cur_val));
+sjis_code:  print_int(fromSJIS(cur_val));
+kuten_code: print_int(fromKUTEN(cur_val));
+kansuji_code: print_kansuji(cur_val);
+string_code:if cur_cs<>0 then sprint_cs(cur_cs)
+  else if KANJI(cx)=0 then print_char(cur_chr)
+  else print_kanji(cx);
+@z
+
+@x [28.487] l.9852 - pTeX: iftdir, ifydir, iftbox, ifybox
+@d if_case_code=16 { `\.{\\ifcase}' }
+@y
+@d if_case_code=16 { `\.{\\ifcase}' }
+@d if_tdir_code=17 { `\.{\\iftdir}' }
+@d if_ydir_code=18 { `\.{\\ifydir}' }
+@d if_mdir_code=19 { `\.{\\ifmdir}' }
+@d if_tbox_code=20 { `\.{\\iftbox}' }
+@d if_ybox_code=21 { `\.{\\ifybox}' }
+@z
+
+@x [28.487] l.9887 - pTeX: iftdir, ifydir, iftbox, ifybox
+primitive("ifcase",if_test,if_case_code);
+@!@:if_case_}{\.{\\ifcase} primitive@>
+@y
+primitive("ifcase",if_test,if_case_code);
+@!@:if_case_}{\.{\\ifcase} primitive@>
+primitive("iftdir",if_test,if_tdir_code);
+@!@:if_tdir_}{\.{\\iftdir} primitive@>
+primitive("ifydir",if_test,if_ydir_code);
+@!@:if_ydir_}{\.{\\ifydir} primitive@>
+primitive("ifmdir",if_test,if_mdir_code);
+@!@:if_mdir_}{\.{\\ifmdir} primitive@>
+primitive("iftbox",if_test,if_tbox_code);
+@!@:if_tbox_}{\.{\\iftbox} primitive@>
+primitive("ifybox",if_test,if_ybox_code);
+@!@:if_ybox_}{\.{\\ifybox} primitive@>
+@z
+
+@x [28.488] l.9907 - pTeX: iftdir, ifydir, iftbox, ifybox
+  if_case_code:print_esc("ifcase");
+@y
+  if_case_code:print_esc("ifcase");
+  if_tdir_code:print_esc("iftdir");
+  if_ydir_code:print_esc("ifydir");
+  if_mdir_code:print_esc("ifmdir");
+  if_tbox_code:print_esc("iftbox");
+  if_ybox_code:print_esc("ifybox");
+@z
+
+@x [28.501] l.10073 - pTeX: iftdir, ifydir, iftbox, ifybox
+if_void_code, if_hbox_code, if_vbox_code: @<Test box register status@>;
+@y
+if_tdir_code: b:=(abs(direction)=dir_tate);
+if_ydir_code: b:=(abs(direction)=dir_yoko);
+if_mdir_code: b:=(direction<0);
+if_void_code, if_hbox_code, if_vbox_code, if_tbox_code, if_ybox_code:
+  @<Test box register status@>;
+@z
+
+@x [28.505] l.10118 - pTeX: Test box register status : iftbox, ifybox
+if this_if=if_void_code then b:=(p=null)
+else if p=null then b:=false
+else if this_if=if_hbox_code then b:=(type(p)=hlist_node)
+else b:=(type(p)=vlist_node);
+@y
+if this_if=if_void_code then b:=(p=null)
+else if p=null then b:=false
+else begin
+  if type(p)=dir_node then p:=list_ptr(p);
+  if this_if=if_hbox_code then b:=(type(p)=hlist_node)
+  else if this_if=if_vbox_code then b:=(type(p)=vlist_node)
+  else if this_if=if_tbox_code then b:=(box_dir(p)=dir_tate)
+  else b:=(box_dir(p)=dir_yoko);
+  end
+@z
+
+@x [28.502] l.10138 - pTeX: ifx : Test character : KANJI character
+if (cur_cmd>active_char)or(cur_chr>255) then {not a character}
+  begin m:=relax; n:=256;
+  end
+else  begin m:=cur_cmd; n:=cur_chr;
+  end;
+get_x_token_or_active_char;
+if (cur_cmd>active_char)or(cur_chr>255) then
+  begin cur_cmd:=relax; cur_chr:=256;
+  end;
+@y
+if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+  begin m:=cur_cmd; n:=cur_chr;
+  end
+else if (cur_cmd>active_char)or(cur_chr>255) then
+  begin m:=relax; n:=256;
+  end
+else  begin m:=cur_cmd; n:=cur_chr;
+  end;
+get_x_token_or_active_char;
+if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+  begin cur_cmd:=cur_cmd;
+  end {dummy}
+else if (cur_cmd>active_char)or(cur_chr>255) then
+  begin cur_cmd:=relax; cur_chr:=256;
+  end;
+@z
+
+@x [29.523] l.10571 - pTeX: xord
+for j:=1 to n do append_to_name(xord[TEX_format_default[j]]);
+for j:=a to b do append_to_name(buffer[j]);
+for j:=format_default_length-format_ext_length+1 to format_default_length do
+  append_to_name(xord[TEX_format_default[j]]);
+@y
+if name_of_file then libc_free (name_of_file);
+name_of_file := xmalloc (1 + n + (b - a + 1) + format_ext_length + 1);
+for j:=1 to n do append_to_name(xord[TEX_format_default[j]]);
+for j:=a to b do append_to_name(buffer[j]);
+for j:=format_default_length-format_ext_length+1 to format_default_length do
+  append_to_name(xord[TEX_format_default[j]]);
+@z
+
+@x [29.526] l.10668 - pTeX: scan file name
+loop@+begin if (cur_cmd>other_char)or(cur_chr>255) then {not a character}
+    begin back_input; goto done;
+    end;
+  {If |cur_chr| is a space and we're not scanning a token list, check
+   whether we're at the end of the buffer. Otherwise we end up adding
+   spurious spaces to file names in some cases.}
+  if (cur_chr=" ") and (state<>token_list) and (loc>limit) then goto done;
+  if not more_name(cur_chr) then goto done;
+  get_x_token;
+  end;
+done: end_name; name_in_progress:=false;
+@y
+skip_mode:=false;
+loop@+begin
+  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {is kanji}
+    begin str_room(2);
+    append_char(Hi(cur_chr)); {kanji upper byte}
+    append_char(Lo(cur_chr)); {kanji lower byte}
+    end
+  else if (cur_cmd>other_char)or(cur_chr>255) then {not a alphabet}
+    begin back_input; goto done;
+    end
+  {If |cur_chr| is a space and we're not scanning a token list, check
+   whether we're at the end of the buffer. Otherwise we end up adding
+   spurious spaces to file names in some cases.}
+   else if ((cur_chr=" ") and (state<>token_list) and (loc>limit)) or not more_name(cur_chr) then goto done;
+  get_x_token;
+  end;
+done: end_name; name_in_progress:=false;
+skip_mode:=true;
+@z
+
+@x [29.536] l.10834 - pTeX:
+begin
+if src_specials_p or file_line_error_style_p or parse_first_line_p
+then
+  wlog(banner_k)
+else
+  wlog(banner);
+@y
+begin
+if src_specials_p or file_line_error_style_p or parse_first_line_p
+then
+  wlog(banner_k)
+else
+  wlog(banner);
+  wlog(' (');
+  wlog(conststringcast(get_enc_string));
+  wlog(')');
+@z
+
+@x [30.560] l.10968 - pTeX:
+This is called BigEndian order.
+@!@^BigEndian order@>
+@y
+This is called BigEndian order.
+@!@^BigEndian order@>
+
+We use to get \TeX\ knowledge about KANJI fonts from \.{JFM} files.
+The \.{JFM} format holds more two 16-bit integers ,|id| and |nt|,
+at the top of the file.
+$$\vbox{\halign{\hfil#&$\null=\null$#\hfil\cr
+|id|&identification code of the file;\cr
+|nt|&number of words in the |char_type| table;\cr}}$$
+The identification byte, |id| equals~11 or~9. When \TeX read a font file,
+the |id| equals~11 or~9 then the font is the \.{JFM}, othercases it is
+the \.{TFM} file. The \.{TFM} holds |lf| at the same postion of |id|,
+usually it take a larger number than~9 or~11.
+The |nt| is nonngative and less than $2^{15}$.
+
+We must have |ec=0|,
+$$\hbox{|lf=7+lh+nt+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np|.}$$
+
+@d yoko_jfm_id=11 {for `yoko-kumi' fonts}
+@d tate_jfm_id=9  {for `tate-kumi' fonts}
+@z
+
+@x [30.544] l.11085 - pTeX: gk_tag
+operation looks for both |list_tag| and |ext_tag|.
+@y
+operation looks for both |list_tag| and |ext_tag|.
+
+If the \.{JFM}, the |lig_tag| is called |gk_tag|. The |gk_tag| means that
+this character has a glue/kerning program starting at position |remainder|
+in the |glue_kern| array. And a \.{JFM} not used |tag=2| and |tag=3|.
+@z
+
+@x [30.544] l.11088 - pTeX: gk_tag
+@d lig_tag=1 {character has a ligature/kerning program}
+@y
+@d lig_tag=1 {character has a ligature/kerning program}
+@d gk_tag=1 {character has a glue/kerning program}
+@z
+
+@x [30.549] l.11228 - pTeX:
+@<Glob...@>=
+@!font_info: ^fmemory_word;
+@y
+@<Glob...@>=
+@!font_info: ^memory_word; {pTeX: use halfword for |char_type| table.}
+@!font_dir: ^eight_bits;
+  {pTeX: direction of fonts, 0 is default, 1 is Yoko, 2 is Tate}
+@!font_num_ext: ^integer;
+  {pTeX: number of the |char_type| table.}
+@z
+
+@x [30.550] l.11270 - pTeX:
+@!char_base: ^integer;
+  {base addresses for |char_info|}
+@y
+@!char_base: ^integer;
+  {base addresses for |char_info|}
+@!ctype_base: ^integer;
+  {pTeX: base addresses for KANJI character type parameters}
+@z
+
+@x [30.554] l.11373 - pTeX:
+@d orig_char_info_end(#)==#].qqqq
+@d orig_char_info(#)==font_info[char_base[#]+orig_char_info_end
+@y
+@d orig_char_info_end(#)==#].qqqq
+@d orig_char_info(#)==font_info[char_base[#]+orig_char_info_end
+@#
+@d kchar_code_end(#)==#].hh.rh
+@d kchar_code(#)==font_info[ctype_base[#]+kchar_code_end
+@d kchar_type_end(#)==#].hh.lhfield
+@d kchar_type(#)==font_info[ctype_base[#]+kchar_type_end
+@z
+
+@x [30.557] l.11413 - pTeX: glue_kern_start
+@d lig_kern_start(#)==lig_kern_base[#]+rem_byte {beginning of lig/kern program}
+@y
+@d lig_kern_start(#)==lig_kern_base[#]+rem_byte {beginning of lig/kern program}
+@d glue_kern_start(#)==lig_kern_base[#]+rem_byte
+  {beginning of glue/kern program}
+@z
+
+@x [30.560] l.11457 - pTeX: jfm_flag, jfm_id, nt, cx
+var k:font_index; {index into |font_info|}
+@y
+var k:font_index; {index into |font_info|}
+@!jfm_flag:dir_default..dir_tate; {direction of the \.{JFM}}
+@!nt:halfword; {number of the |char_type| tables}
+@!cx:KANJI_code; {kanji code}
+@z
+
+@x [30.565] l.11548 - pTeX: read tfm size
+@ @<Read the {\.{TFM}} size fields@>=
+begin read_sixteen(lf);
+fget; read_sixteen(lh);
+fget; read_sixteen(bc);
+fget; read_sixteen(ec);
+if (bc>ec+1)or(ec>255) then abort;
+if bc>255 then {|bc=256| and |ec=255|}
+  begin bc:=1; ec:=0;
+  end;
+fget; read_sixteen(nw);
+fget; read_sixteen(nh);
+fget; read_sixteen(nd);
+fget; read_sixteen(ni);
+fget; read_sixteen(nl);
+fget; read_sixteen(nk);
+fget; read_sixteen(ne);
+fget; read_sixteen(np);
+if lf<>6+lh+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np then abort;
+if (nw=0)or(nh=0)or(nd=0)or(ni=0) then abort;
+end
+@y
+@ @<Read the {\.{TFM}} size fields@>=
+begin read_sixteen(lf);
+fget; read_sixteen(lh);
+if lf=yoko_jfm_id then
+  begin jfm_flag:=dir_yoko; nt:=lh;
+  fget; read_sixteen(lf);
+  fget; read_sixteen(lh);
+  end
+else if lf=tate_jfm_id then
+  begin jfm_flag:=dir_tate; nt:=lh;
+  fget; read_sixteen(lf);
+  fget; read_sixteen(lh);
+  end
+else begin jfm_flag:=dir_default; nt:=0;
+  end;
+fget; read_sixteen(bc);
+fget; read_sixteen(ec);
+if (bc>ec+1)or(ec>255) then abort;
+if bc>255 then {|bc=256| and |ec=255|}
+  begin bc:=1; ec:=0;
+  end;
+fget; read_sixteen(nw);
+fget; read_sixteen(nh);
+fget; read_sixteen(nd);
+fget; read_sixteen(ni);
+fget; read_sixteen(nl);
+fget; read_sixteen(nk);
+fget; read_sixteen(ne);
+fget; read_sixteen(np);
+if jfm_flag<>dir_default then
+  begin if lf<>7+lh+nt+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np then abort
+  end
+else
+  begin if lf<>6+lh+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np then abort
+  end;
+if (nw=0)or(nh=0)or(nd=0)or(ni=0) then abort;
+end
+@z
+
+@x [30.566] l.11574 - pTeX: set font_dir & font_num_ext
+@<Use size fields to allocate font information@>=
+lf:=lf-6-lh; {|lf| words should be loaded into |font_info|}
+if np<7 then lf:=lf+7-np; {at least seven parameters will appear}
+if (font_ptr=font_max)or(fmem_ptr+lf>font_mem_size) then
+  @<Apologize for not loading the font, |goto done|@>;
+f:=font_ptr+1;
+char_base[f]:=fmem_ptr-bc;
+width_base[f]:=char_base[f]+ec+1;
+height_base[f]:=width_base[f]+nw;
+depth_base[f]:=height_base[f]+nh;
+italic_base[f]:=depth_base[f]+nd;
+lig_kern_base[f]:=italic_base[f]+ni;
+kern_base[f]:=lig_kern_base[f]+nl-kern_base_offset;
+exten_base[f]:=kern_base[f]+kern_base_offset+nk;
+param_base[f]:=exten_base[f]+ne
+@y
+@<Use size fields to allocate font information@>=
+if jfm_flag<>dir_default then
+  lf:=lf-7-lh  {If \.{JFM}, |lf| holds more two-16bit records than \.{TFM}}
+else
+  lf:=lf-6-lh; {|lf| words should be loaded into |font_info|}
+if np<7 then lf:=lf+7-np; {at least seven parameters will appear}
+if (font_ptr=font_max)or(fmem_ptr+lf>font_mem_size) then
+  @<Apologize for not loading the font, |goto done|@>;
+f:=font_ptr+1;
+font_dir[f]:=jfm_flag;
+font_num_ext[f]:=nt;
+ctype_base[f]:=fmem_ptr;
+char_base[f]:=ctype_base[f]+nt-bc;
+width_base[f]:=char_base[f]+ec+1;
+height_base[f]:=width_base[f]+nw;
+depth_base[f]:=height_base[f]+nh;
+italic_base[f]:=depth_base[f]+nd;
+lig_kern_base[f]:=italic_base[f]+ni;
+kern_base[f]:=lig_kern_base[f]+nl-kern_base_offset;
+exten_base[f]:=kern_base[f]+kern_base_offset+nk;
+param_base[f]:=exten_base[f]+ne;
+@z
+
+@x [30.569] l.11619 - pTeX: read char_type
+@ @<Read character data@>=
+for k:=fmem_ptr to width_base[f]-1 do
+  begin store_four_quarters(font_info[k].qqqq);
+@y
+@ @<Read character data@>=
+if jfm_flag<>dir_default then
+  for k:=ctype_base[f] to ctype_base[f]+nt-1 do
+    begin
+    fget; read_sixteen(cx); font_info[k].hh.rh:=tokanji(cx); {|kchar_code|}
+    fget; read_sixteen(cx); font_info[k].hh.lhfield:=tonum(cx); {|kchar_type|}
+    end;
+for k:=char_base[f]+bc to width_base[f]-1 do
+  begin store_four_quarters(font_info[k].qqqq);
+@z
+
+@x [30.570] l.11638 - pTeX:
+@d current_character_being_worked_on==k+bc-fmem_ptr
+@y
+@d current_character_being_worked_on==k-char_base[f]
+@z
+
+@x [30.573] l.11704 - pTeX: jfm
+    if a>128 then
+      begin if 256*c+d>=nl then abort;
+      if a=255 then if k=lig_kern_base[f] then bchar:=b;
+      end
+    else begin if b<>bchar then check_existence(b);
+      if c<128 then check_existence(d) {check ligature}
+      else if 256*(c-128)+d>=nk then abort; {check kern}
+      if a<128 then if k-lig_kern_base[f]+a+1>=nl then abort;
+      end;
+    end;
+@y
+    if a>128 then
+      begin if 256*c+d>=nl then abort;
+      if a=255 then if k=lig_kern_base[f] then bchar:=b;
+      end
+    else begin if b<>bchar then check_existence(b);
+      if c<128 then begin
+          if jfm_flag<>dir_default then begin if d>=ne then abort; end
+        else check_existence(d); {check ligature}
+      end else if 256*(c-128)+d>=nk then abort; {check kern}
+      if a<128 then if k-lig_kern_base[f]+a+1>=nl then abort;
+      end;
+    end;
+@z
+
+@x [30.574] l.11720 - pTeX: read jfm exten
+for k:=exten_base[f] to param_base[f]-1 do
+  begin store_four_quarters(font_info[k].qqqq);
+@y
+if jfm_flag<>dir_default then
+  for k:=exten_base[f] to param_base[f]-1 do
+    store_scaled(font_info[k].sc) {NOTE: this area subst for glue program}
+else for k:=exten_base[f] to param_base[f]-1 do
+  begin store_four_quarters(font_info[k].qqqq);
+@z
+
+@x [30.576] l.11765 - pTeX: adjust ctype_base
+adjust(char_base); adjust(width_base); adjust(lig_kern_base);
+@y
+adjust(ctype_base);
+adjust(char_base); adjust(width_base); adjust(lig_kern_base);
+@z
+
+@x [30.577] l.11778 - pTeX: jfont, tfont
+if cur_cmd=def_font then f:=cur_font
+@y
+if cur_cmd=def_jfont then f:=cur_jfont
+else if cur_cmd=def_tfont then f:=cur_tfont
+else if cur_cmd=def_font then f:=cur_font
+@z
+
+@x
+@p procedure char_warning(@!f:internal_font_number;@!c:eight_bits);
+var old_setting: integer; {saved value of |tracing_online|}
+begin if tracing_lost_chars>0 then
+ begin old_setting:=tracing_online;
+ if eTeX_ex and(tracing_lost_chars>1) then tracing_online:=1;
+  begin begin_diagnostic;
+  print_nl("Missing character: There is no ");
+@.Missing character@>
+  print_ASCII(c); print(" in font ");
+  slow_print(font_name[f]); print_char("!"); end_diagnostic(false);
+  end;
+@y
+@d print_lc_hex(#)==l:=#;
+  if l<10 then print_char(l+"0")@+else print_char(l-10+"a")
+
+@p procedure char_warning(@!f:internal_font_number;@!c:eight_bits);
+var @!l:0..255; {small indices or counters}
+old_setting: integer; {saved value of |tracing_online|}
+begin if tracing_lost_chars>0 then
+ begin old_setting:=tracing_online;
+ if eTeX_ex and(tracing_lost_chars>1) then tracing_online:=1;
+  begin begin_diagnostic;
+  print_nl("Missing character: There is no ");
+@.Missing character@>
+  if (c<" ")or(c>"~") then
+    begin print_char("^"); print_char("^");
+    if c<64 then print_char(c+64)
+    else if c<128 then print_char(c-64)
+    else begin print_lc_hex(c div 16);  print_lc_hex(c mod 16); end
+    end
+  else print_ASCII(c);
+  print(" in font ");
+  slow_print(font_name[f]); print_char("!"); end_diagnostic(false);
+  end;
+@z
+
+@x [31.586] l.12189 - pTeX: define set2
+@d set1=128 {typeset a character and move right}
+@y
+@d set1=128 {typeset a character and move right}
+@d set2=129 {typeset a character and move right}
+@z
+@x [31.586] l.12214 - pTeX: define dirchg
+@d post_post=249 {postamble ending}
+@y
+@d post_post=249 {postamble ending}
+@d dirchg=255 {direction change}
+@z
+
+@x [31.587] l.12246 - pTeX: ex_id_byte
+@d id_byte=2 {identifies the kind of \.{DVI} files described here}
+@y
+@d id_byte=2 {identifies the kind of \.{DVI} files described here}
+@d ex_id_byte=3 {identifies the kind of extended \.{DVI} files}
+@z
+
+@x [32.590] l.12329 - pTeX: ex_id_byte: This dvi is extended!
+@ The last part of the postamble, following the |post_post| byte that
+signifies the end of the font definitions, contains |q|, a pointer to the
+|post| command that started the postamble.  An identification byte, |i|,
+comes next; this currently equals~2, as in the preamble.
+@y
+@ The last part of the postamble, following the |post_post| byte that
+signifies the end of the font definitions, contains |q|, a pointer to the
+|post| command that started the postamble.  An identification byte, |i|,
+comes next; this equals~2 or~3. If not used p\TeX primitives then the
+identification byte equals~2, othercase this is set to~3.
+@z
+
+@x [32.592] l.12405 - pTeX:
+ {character and font in current |char_node|}
+@!c:quarterword;
+@!f:internal_font_number;
+@y
+ {character and font in current |char_node|}
+@!c:quarterword;
+@!f:internal_font_number;
+@!dir_used:boolean; {Is this dvi extended?}
+@z
+
+@x [32.593] l.12414 - pTeX: dir_used: Is this dvi extended?
+doing_leaders:=false; dead_cycles:=0; cur_s:=-1;
+@y
+doing_leaders:=false; dead_cycles:=0; cur_s:=-1; dir_used:=false;
+@z
+
+@x [32.617] l.12846 - pTeX: Initialize dvi_dir as shipout begins
+dvi_h:=0; dvi_v:=0; cur_h:=h_offset; dvi_f:=null_font;
+@y
+dvi_h:=0; dvi_v:=0; cur_h:=h_offset; dvi_f:=null_font;
+dvi_dir:=dir_yoko; cur_dir_hv:=dvi_dir;
+@z
+
+@x [32.619] l.12892 - pTeX: hlist_out Kanji, disp_node
+procedure hlist_out; {output an |hlist_node| box}
+label reswitch, move_past, fin_rule, next_p, continue, found;
+var base_line: scaled; {the baseline coordinate for this box}
+@y
+procedure hlist_out; {output an |hlist_node| box}
+label reswitch, move_past, fin_rule, next_p, continue, found;
+var base_line: scaled; {the baseline coordinate for this box}
+@!disp: scaled; {displacement}
+@!save_dir:eight_bits; {what |dvi_dir| should pop to}
+@!jc:KANJI_code; {temporary register for KANJI codes}
+@!ksp_ptr:pointer; {position of |auto_spacing_glue| in the hlist}
+@z
+@x [32.619] l.12913 - pTeX: hlist_out Kanji, disp_node
+incr(cur_s);
+if cur_s>0 then dvi_out(push);
+if cur_s>max_push then max_push:=cur_s;
+save_loc:=dvi_offset+dvi_ptr; base_line:=cur_v; left_edge:=cur_h;
+@y
+ksp_ptr:=space_ptr(this_box);
+incr(cur_s);
+if cur_s>0 then dvi_out(push);
+if cur_s>max_push then max_push:=cur_s;
+save_loc:=dvi_offset+dvi_ptr;
+synch_dir;
+base_line:=cur_v; left_edge:=cur_h; disp:=0;
+@z
+
+@x [32.622] l.12945 - pTeX: chain
+@<Output node |p| for |hlist_out|...@>=
+reswitch: if is_char_node(p) then
+  begin synch_h; synch_v;
+  repeat f:=font(p); c:=character(p);
+  if f<>dvi_f then @<Change font |dvi_f| to |f|@>;
+  if font_ec[f]>=qo(c) then if font_bc[f]<=qo(c) then
+    if char_exists(orig_char_info(f)(c)) then  {N.B.: not |char_info|}
+      begin if c>=qi(128) then dvi_out(set1);
+      dvi_out(qo(c));@/
+      cur_h:=cur_h+char_width(f)(orig_char_info(f)(c));
+      goto continue;
+      end;
+  if mltex_enabled_p then
+    @<Output a substitution, |goto continue| if not possible@>;
+continue:
+  p:=link(p);
+  until not is_char_node(p);
+  dvi_h:=cur_h;
+  end
+else @<Output the non-|char_node| |p| for |hlist_out|
+    and move to the next node@>
+@y
+@<Output node |p| for |hlist_out|...@>=
+reswitch: if is_char_node(p) then
+  begin synch_h; synch_v;
+  chain:=false;
+  repeat f:=font(p); c:=character(p);
+  if f<>dvi_f then @<Change font |dvi_f| to |f|@>;
+  if font_dir[f]=dir_default then
+    begin chain:=false;
+    if font_ec[f]>=qo(c) then if font_bc[f]<=qo(c) then
+      if char_exists(orig_char_info(f)(c)) then  {N.B.: not |char_info|}
+        begin if c>=qi(128) then dvi_out(set1);
+        dvi_out(qo(c));@/
+        cur_h:=cur_h+char_width(f)(orig_char_info(f)(c));
+        goto continue;
+        end;
+    if mltex_enabled_p then
+      @<Output a substitution, |goto continue| if not possible@>;
+continue:
+    end
+  else
+    begin if chain=false then chain:=true
+    else begin cur_h:=cur_h+width(ksp_ptr);
+      if g_sign<>normal then
+        begin  if g_sign=stretching then
+          begin  if stretch_order(ksp_ptr)=g_order then
+            cur_h:=cur_h+round(float(glue_set(this_box))*stretch(ksp_ptr));
+@^real multiplication@>
+          end
+        else
+          begin  if shrink_order(ksp_ptr)=g_order then
+            cur_h:=cur_h-round(float(glue_set(this_box))*shrink(ksp_ptr));
+@^real multiplication@>
+          end;
+        end;
+      synch_h;
+      end;
+    prev_p:=link(prev_p); {N.B.: not |prev_p:=p|, |p| might be |lig_trick|}
+    p:=link(p);
+	jc:=toDVI(KANJI(info(p)));
+    dvi_out(set2); dvi_out(Hi(jc)); dvi_out(Lo(jc));
+    cur_h:=cur_h+char_width(f)(orig_char_info(f)(c)); {not |jc|}
+    end;
+  dvi_h:=cur_h; p:=link(p);
+  until not is_char_node(p);
+  chain:=false;
+  end
+else @<Output the non-|char_node| |p| for |hlist_out|
+    and move to the next node@>
+@z
+
+@x [32.623] l.12982 - pTeX: disp_node, dir_node
+@ @<Output the non-|char_node| |p| for |hlist_out|...@>=
+begin case type(p) of
+hlist_node,vlist_node:@<Output a box in an hlist@>;
+rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
+  goto fin_rule;
+  end;
+whatsit_node: @<Output the whatsit node |p| in an hlist@>;
+@y
+@ @<Output the non-|char_node| |p| for |hlist_out|...@>=
+begin case type(p) of
+hlist_node,vlist_node,dir_node:@<Output a box in an hlist@>;
+rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
+  goto fin_rule;
+  end;
+whatsit_node: @<Output the whatsit node |p| in an hlist@>;
+disp_node: begin disp:=disp_dimen(p); revdisp:=disp; cur_v:=base_line+disp; end;
+@z
+
+@x [32.624] l.13000 - pTeX: output a box(and dir_node) with disp
+@ @<Output a box in an hlist@>=
+if list_ptr(p)=null then cur_h:=cur_h+width(p)
+else  begin save_h:=dvi_h; save_v:=dvi_v;
+  cur_v:=base_line+shift_amount(p); {shift the box down}
+@y
+@ @<Output a box in an hlist@>=
+if list_ptr(p)=null then cur_h:=cur_h+width(p)
+else  begin save_h:=dvi_h; save_v:=dvi_v; save_dir:=dvi_dir;
+  cur_v:=base_line+disp+shift_amount(p); {shift the box down}
+@z
+@x [32.624] l.13005 - pTeX: output a box(and dir_node) with disp
+  if type(p)=vlist_node then vlist_out@+else hlist_out;
+  dvi_h:=save_h; dvi_v:=save_v;
+  cur_h:=edge; cur_v:=base_line;
+  end
+@y
+  case type(p) of
+    hlist_node:hlist_out;
+    vlist_node:vlist_out;
+    dir_node:dir_out;
+  endcases;
+  dvi_h:=save_h; dvi_v:=save_v; dvi_dir:=save_dir;
+  cur_h:=edge; cur_v:=base_line+disp; cur_dir_hv:=save_dir;
+  end
+@z
+
+@x [32.625] l.13010 - pTeX: Output a rule with disp
+@ @<Output a rule in an hlist@>=
+if is_running(rule_ht) then rule_ht:=height(this_box);
+if is_running(rule_dp) then rule_dp:=depth(this_box);
+@y
+@ @<Output a rule in an hlist@>=
+if is_running(rule_ht) then rule_ht:=height(this_box)+disp;
+if is_running(rule_dp) then rule_dp:=depth(this_box)-disp;
+@z
+
+@x [32.629] l.13103 - pTeX: Output a leader box(and dir_node) with disp
+@<Output a leader box at |cur_h|, ...@>=
+begin cur_v:=base_line+shift_amount(leader_box); synch_v; save_v:=dvi_v;@/
+synch_h; save_h:=dvi_h; temp_ptr:=leader_box;
+@y
+@<Output a leader box at |cur_h|, ...@>=
+begin cur_v:=base_line+disp+shift_amount(leader_box); synch_v; save_v:=dvi_v;@/
+synch_h; save_h:=dvi_h; save_dir:=dvi_dir; temp_ptr:=leader_box;
+@z
+@x [32.629] l.13107 - pTeX: Output a leader box(and dir_node) with disp
+if type(leader_box)=vlist_node then vlist_out@+else hlist_out;
+doing_leaders:=outer_doing_leaders;
+dvi_v:=save_v; dvi_h:=save_h; cur_v:=base_line;
+cur_h:=save_h+leader_wd+lx;
+end
+@y
+case type(leader_box) of
+  hlist_node:hlist_out;
+  vlist_node:vlist_out;
+  dir_node:dir_out;
+endcases;
+doing_leaders:=outer_doing_leaders;
+dvi_v:=save_v; dvi_h:=save_h; dvi_dir:=save_dir;
+cur_v:=base_line; cur_h:=save_h+leader_wd+lx; cur_dir_hv:=save_dir;
+end
+@z
+
+@x [32.630] l.13133 - pTeX: vlist_out
+begin cur_g:=0; cur_glue:=float_constant(0);
+this_box:=temp_ptr; g_order:=glue_order(this_box);
+g_sign:=glue_sign(this_box); p:=list_ptr(this_box);
+incr(cur_s);
+if cur_s>0 then dvi_out(push);
+if cur_s>max_push then max_push:=cur_s;
+save_loc:=dvi_offset+dvi_ptr; left_edge:=cur_h; cur_v:=cur_v-height(this_box);
+@y
+@!save_dir:integer; {what |dvi_dir| should pop to}
+begin cur_g:=0; cur_glue:=float_constant(0);
+this_box:=temp_ptr; g_order:=glue_order(this_box);
+g_sign:=glue_sign(this_box); p:=list_ptr(this_box);
+incr(cur_s);
+if cur_s>0 then dvi_out(push);
+if cur_s>max_push then max_push:=cur_s;
+save_loc:=dvi_offset+dvi_ptr;
+synch_dir;
+left_edge:=cur_h; cur_v:=cur_v-height(this_box);
+@z
+
+@x [32.632] l.13155 - pTeX: output non-char-node
+@ @<Output the non-|char_node| |p| for |vlist_out|@>=
+begin case type(p) of
+hlist_node,vlist_node:@<Output a box in a vlist@>;
+rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
+  goto fin_rule;
+  end;
+@y
+@ @<Output the non-|char_node| |p| for |vlist_out|@>=
+begin case type(p) of
+hlist_node,vlist_node,dir_node: @<Output a box in a vlist@>;
+rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
+  goto fin_rule;
+  end;
+@z
+
+@x [32.633] l.13175 - pTeX: Output a box in a vlist
+@<Output a box in a vlist@>=
+if list_ptr(p)=null then cur_v:=cur_v+height(p)+depth(p)
+else  begin cur_v:=cur_v+height(p); synch_v;
+  save_h:=dvi_h; save_v:=dvi_v;
+@y
+@<Output a box in a vlist@>=
+if list_ptr(p)=null then cur_v:=cur_v+height(p)+depth(p)
+else begin cur_v:=cur_v+height(p); synch_v;
+  save_h:=dvi_h; save_v:=dvi_v; save_dir:=dvi_dir;
+@z
+@x [32.633] l.13181 - pTeX: Output a box in a vlist
+  if type(p)=vlist_node then vlist_out@+else hlist_out;
+  dvi_h:=save_h; dvi_v:=save_v;
+  cur_v:=save_v+depth(p); cur_h:=left_edge;
+  end
+@y
+  case type(p) of
+    hlist_node:hlist_out;
+    vlist_node:vlist_out;
+    dir_node:dir_out;
+  endcases;
+  dvi_h:=save_h; dvi_v:=save_v; dvi_dir:=save_dir;
+  cur_v:=save_v+depth(p); cur_h:=left_edge; cur_dir_hv:=save_dir;
+  end
+@z
+
+@x [32.637] l.13256 - pTeX: Output a leader in a vlist
+@<Output a leader box at |cur_v|, ...@>=
+@y
+@<Output a leader box at |cur_v|, ...@>=
+@z
+@x [32.637] l.13258 - pTeX: Output a leader in a vlist
+cur_v:=cur_v+height(leader_box); synch_v; save_v:=dvi_v;
+temp_ptr:=leader_box;
+outer_doing_leaders:=doing_leaders; doing_leaders:=true;
+if type(leader_box)=vlist_node then vlist_out@+else hlist_out;
+doing_leaders:=outer_doing_leaders;
+dvi_v:=save_v; dvi_h:=save_h; cur_h:=left_edge;
+cur_v:=save_v-height(leader_box)+leader_ht+lx;
+end
+@y
+cur_v:=cur_v+height(leader_box); synch_v; save_v:=dvi_v; save_dir:=dvi_dir;
+temp_ptr:=leader_box;
+outer_doing_leaders:=doing_leaders; doing_leaders:=true;
+case type(leader_box) of
+  hlist_node:hlist_out;
+  vlist_node:vlist_out;
+  dir_node:dir_out;
+endcases;
+doing_leaders:=outer_doing_leaders;
+dvi_v:=save_v; dvi_h:=save_h; dvi_dir:=save_dir;
+cur_h:=left_edge; cur_v:=save_v-height(leader_box)+leader_ht+lx;
+cur_dir_hv:=save_dir;
+end
+@z
+
+@x [32.638] l.13270 - pTeX: ship out
+@p procedure ship_out(@!p:pointer); {output the box |p|}
+label done;
+var page_loc:integer; {location of the current |bop|}
+@y
+@p procedure ship_out(@!p:pointer); {output the box |p|}
+label done;
+var page_loc:integer; {location of the current |bop|}
+@!del_node:pointer; {used when delete the |dir_node| continued box}
+@z
+@x [32.640] l.13294 - pTeX: ship out
+@<Ship box |p| out@>;
+@y
+if type(p)=dir_node then
+  begin del_node:=p; p:=list_ptr(p);
+  delete_glue_ref(space_ptr(del_node));
+  delete_glue_ref(xspace_ptr(del_node));
+  free_node(del_node,box_node_size);
+  end;
+flush_node_list(link(p)); link(p):=null;
+if box_dir(p)<>dir_yoko then p:=new_dir_node(p,dir_yoko);
+@<Ship box |p| out@>;
+@z
+
+@x [32.641] l.13327 - pTeX: dir_node
+if type(p)=vlist_node then vlist_out@+else hlist_out;
+@y
+case type(p) of
+  hlist_node:hlist_out;
+  vlist_node:vlist_out;
+  dir_node:dir_out;
+endcases;
+@z
+
+@x [33.642] l.13394 - pTeX: postamble's id_byte
+  @<Output the font definitions for all fonts that were used@>;
+  dvi_out(post_post); dvi_four(last_bop); dvi_out(id_byte);@/
+@y
+  @<Output the font definitions for all fonts that were used@>;
+  dvi_out(post_post); dvi_four(last_bop);
+  if dir_used then dvi_out(ex_id_byte) else dvi_out(id_byte);@/
+@z
+
+@x [33.647] l.13515 - pTeX: cur_kanji_skip, cur_xkanji_skip, last_disp
+@< Glob...@>=
+@!adjust_tail:pointer; {tail of adjustment list}
+@y
+@< Glob...@>=
+@!adjust_tail:pointer; {tail of adjustment list}
+@!last_disp:scaled; {displacement at end of list}
+@!cur_kanji_skip:pointer;
+@!cur_xkanji_skip:pointer;
+@z
+
+@x [33.648] l.13518 - pTeX: cur_kanji_skip, cur_xkanji_skip
+@ @<Set init...@>=adjust_tail:=null; last_badness:=0;
+@y
+@ @<Set init...@>=adjust_tail:=null; last_badness:=0;
+  cur_kanji_skip:=zero_glue; cur_xkanji_skip:=zero_glue;
+{ koko
+  |incr(glue_ref_count(cur_kanji_skip));|
+  |incr(glue_ref_count(cur_xkanji_skip));|
+}
+@z
+
+@x [33.649] l.13522 - pTeX: hpack
+@p function hpack(@!p:pointer;@!w:scaled;@!m:small_number):pointer;
+label reswitch, common_ending, exit;
+var r:pointer; {the box node that will be returned}
+@y
+@p function hpack(@!p:pointer;@!w:scaled;@!m:small_number):pointer;
+label reswitch, common_ending, exit;
+var r:pointer; {the box node that will be returned}
+@!k:pointer; {points to a |kanji_space| specification}
+@!disp:scaled; {displacement}
+@z
+
+@x [33.649] l.13533 - pTeX: hpack
+begin last_badness:=0; r:=get_node(box_node_size); type(r):=hlist_node;
+subtype(r):=min_quarterword; shift_amount(r):=0;
+q:=r+list_offset; link(q):=p;@/
+h:=0; @<Clear dimensions to zero@>;
+if TeXXeT_en then @<Initialize the LR stack@>;
+while p<>null do @<Examine node |p| in the hlist, taking account of its effect
+  on the dimensions of the new box, or moving it to the adjustment list;
+  then advance |p| to the next node@>;
+if adjust_tail<>null then link(adjust_tail):=null;
+height(r):=h; depth(r):=d;@/
+@<Determine the value of |width(r)| and the appropriate glue setting;
+  then |return| or |goto common_ending|@>;
+common_ending: @<Finish issuing a diagnostic message
+      for an overfull or underfull hbox@>;
+exit: if TeXXeT_en then @<Check for LR anomalies at the end of |hpack|@>;
+hpack:=r;
+end;
+@y
+begin last_badness:=0; r:=get_node(box_node_size); type(r):=hlist_node;
+subtype(r):=min_quarterword; shift_amount(r):=0;
+space_ptr(r):=cur_kanji_skip; xspace_ptr(r):=cur_xkanji_skip;
+add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+k:=cur_kanji_skip;
+q:=r+list_offset; link(q):=p;@/
+h:=0; @<Clear dimensions to zero@>;
+disp:=0;
+if TeXXeT_en then @<Initialize the LR stack@>;
+while p<>null do @<Examine node |p| in the hlist, taking account of its effect
+  on the dimensions of the new box, or moving it to the adjustment list;
+  then advance |p| to the next node@>;
+if adjust_tail<>null then link(adjust_tail):=null;
+height(r):=h; depth(r):=d;@/
+@<Determine the value of |width(r)| and the appropriate glue setting;
+  then |return| or |goto common_ending|@>;
+common_ending:
+  @<Finish issuing a diagnostic message for an overfull or underfull hbox@>;
+exit: last_disp:=disp;
+if TeXXeT_en then @<Check for LR anomalies at the end of |hpack|@>; 
+hpack:=r;
+end;
+@z
+
+@x [33.651] l.13556 - pTeX: dir_node, disp_node, reset chain
+@ @<Examine node |p| in the hlist, taking account of its effect...@>=
+@^inner loop@>
+begin reswitch: while is_char_node(p) do
+  @<Incorporate character dimensions into the dimensions of
+    the hbox that will contain~it, then move to the next node@>;
+if p<>null then
+  begin case type(p) of
+  hlist_node,vlist_node,rule_node,unset_node:
+    @<Incorporate box dimensions into the dimensions of
+      the hbox that will contain~it@>;
+  ins_node,mark_node,adjust_node: if adjust_tail<>null then
+    @<Transfer node |p| to the adjustment list@>;
+  whatsit_node:@<Incorporate a whatsit node into an hbox@>;
+  glue_node:@<Incorporate glue into the horizontal totals@>;
+  kern_node: x:=x+width(p);
+  math_node: begin x:=x+width(p);
+    if TeXXeT_en then @<Adjust \(t)the LR stack for the |hpack| routine@>;
+    end;
+  ligature_node: @<Make node |p| look like a |char_node|
+    and |goto reswitch|@>;
+  othercases do_nothing
+  endcases;@/
+  p:=link(p);
+  end;
+end
+@y
+@ @<Examine node |p| in the hlist, taking account of its effect...@>=
+@^inner loop@>
+begin reswitch: chain:=false;
+while is_char_node(p) do
+  @<Incorporate character dimensions into the dimensions of
+    the hbox that will contain~it, then move to the next node@>;
+if p<>null then
+  begin case type(p) of
+  hlist_node,vlist_node,dir_node,rule_node,unset_node:
+    @<Incorporate box dimensions into the dimensions of
+      the hbox that will contain~it@>;
+  ins_node,mark_node,adjust_node:
+    if adjust_tail<>null then @<Transfer node |p| to the adjustment list@>;
+  whatsit_node:@<Incorporate a whatsit node into an hbox@>;
+  disp_node:begin disp:=disp_dimen(p); revdisp:=disp; end;
+  glue_node:@<Incorporate glue into the horizontal totals@>;
+  kern_node: x:=x+width(p);
+  math_node: begin x:=x+width(p);
+    if TeXXeT_en then @<Adjust \(t)the LR stack for the |hpack| routine@>;
+    end;
+  ligature_node:@<Make node |p| look like a |char_node| and |goto reswitch|@>;
+  othercases do_nothing
+  endcases;@/
+  p:=link(p);
+  end;
+end
+@z
+
+@x [33.653] l.13589 - pTeX: displacement
+@<Incorporate box dimensions into the dimensions of the hbox...@>=
+begin x:=x+width(p);
+if type(p)>=rule_node then s:=0 @+else s:=shift_amount(p);
+if height(p)-s>h then h:=height(p)-s;
+if depth(p)+s>d then d:=depth(p)+s;
+end
+@y
+@<Incorporate box dimensions into the dimensions of the hbox...@>=
+begin x:=x+width(p);
+if type(p)>=rule_node then s:=disp @+else s:=shift_amount(p)+disp;
+if height(p)-s>h then h:=height(p)-s;
+if depth(p)+s>d then d:=depth(p)+s;
+end
+@z
+
+@x [33.654] l.13601 - pTeX: auto spacing, displacement
+@<Incorporate character dimensions into the dimensions of the hbox...@>=
+begin f:=font(p); i:=char_info(f)(character(p)); hd:=height_depth(i);
+x:=x+char_width(f)(i);@/
+s:=char_height(f)(hd);@+if s>h then h:=s;
+s:=char_depth(f)(hd);@+if s>d then d:=s;
+p:=link(p);
+end
+@y
+@<Incorporate character dimensions into the dimensions of the hbox...@>=
+begin f:=font(p); i:=char_info(f)(character(p)); hd:=height_depth(i);
+x:=x+char_width(f)(i);@/
+s:=char_height(f)(hd)-disp; if s>h then h:=s;
+s:=char_depth(f)(hd)+disp; if s>d then d:=s;
+if font_dir[f]<>dir_default then
+  begin p:=link(p);
+  if chain then
+    begin x:=x+width(k);@/
+    o:=stretch_order(k); total_stretch[o]:=total_stretch[o]+stretch(k);
+    o:=shrink_order(k); total_shrink[o]:=total_shrink[o]+shrink(k);
+    end
+  else chain:=true;
+  end
+else chain:=false;
+p:=link(p);
+end
+@z
+
+@x [33.668] l.13779 - pTeX: vpackage
+begin last_badness:=0; r:=get_node(box_node_size); type(r):=vlist_node;
+subtype(r):=min_quarterword; shift_amount(r):=0;
+@y
+begin last_badness:=0; r:=get_node(box_node_size); type(r):=vlist_node;
+subtype(r):=min_quarterword; shift_amount(r):=0;
+space_ptr(r):=zero_glue; xspace_ptr(r):=zero_glue;
+add_glue_ref(zero_glue); add_glue_ref(zero_glue);
+@z
+
+@x [33.669] l.13797 - pTeX: dir_node
+@ @<Examine node |p| in the vlist, taking account of its effect...@>=
+begin if is_char_node(p) then confusion("vpack")
+@:this can't happen vpack}{\quad vpack@>
+else  case type(p) of
+  hlist_node,vlist_node,rule_node,unset_node:
+    @<Incorporate box dimensions into the dimensions of
+      the vbox that will contain~it@>;
+@y
+@ @<Examine node |p| in the vlist, taking account of its effect...@>=
+begin if is_char_node(p) then confusion("vpack")
+@:this can't happen vpack}{\quad vpack@>
+else  case type(p) of
+  hlist_node,vlist_node,dir_node,rule_node,unset_node:
+    @<Incorporate box dimensions into the dimensions of
+      the vbox that will contain~it@>;
+@z
+
+@x [34.681] l.14026 - pTeX: math noad
+@d noad_size=4 {number of words in a normal noad}
+@d nucleus(#)==#+1 {the |nucleus| field of a noad}
+@d supscr(#)==#+2 {the |supscr| field of a noad}
+@d subscr(#)==#+3 {the |subscr| field of a noad}
+@y
+\yskip\hang In Japanese, |math_type(q)=math_jchar| means that |fam(q)|
+refers to one of the sixteen kanji font families, and |KANJI(q)| is the
+internal kanji code number.
+@^Japanese extentions@>
+
+@d noad_size=5 {number of words in a normal noad}
+@d nucleus(#)==#+1 {the |nucleus| field of a noad}
+@d supscr(#)==#+2 {the |supscr| field of a noad}
+@d subscr(#)==#+3 {the |subscr| field of a noad}
+@d kcode_noad(#)==#+4
+@d math_kcode(#)==info(#+4) {the |kanji character| field of a noad}
+@d kcode_noad_nucleus(#)==#+3
+@d math_kcode_nucleus(#)==info(#+3)
+	{the |kanji character| field offset from nucleus}
+@#
+@d math_jchar=5
+@d math_text_jchar=6
+@z
+
+@x [34.686] l.14129 - pTeX: new_noad
+mem[supscr(p)].hh:=empty_field;
+new_noad:=p;
+@y
+mem[supscr(p)].hh:=empty_field;
+mem[kcode_noad(p)].hh:=empty_field;
+new_noad:=p;
+@z
+
+@x [34.687] accent with japanese char
+@d accent_noad_size=5 {number of |mem| words in an accent noad}
+@d accent_chr(#)==#+4 {the |accent_chr| field of an accent noad}
+@y
+@d accent_noad_size=6 {number of |mem| words in an accent noad}
+@d accent_chr(#)==#+5 {the |accent_chr| field of an accent noad}
+@z
+
+@x [34.691] l.14236 - pTeX: print_fam_and_char
+procedure print_fam_and_char(@!p:pointer); {prints family and character}
+begin print_esc("fam"); print_int(fam(p)); print_char(" ");
+print_ASCII(qo(character(p)));
+@y
+procedure print_fam_and_char(@!p:pointer;@!t:small_number);
+					{prints family and character}
+var @!cx:KANJI_code; {temporary register for KANJI}
+begin print_esc("fam"); print_int(fam(p)); print_char(" ");
+if t=math_char then print_ASCII(qo(character(p)))
+else  begin KANJI(cx):=math_kcode_nucleus(p); print_kanji(cx);
+  end;
+@z
+
+@x [34.692] l.14266 - pTeX: print_subsidiary_data
+  math_char: begin print_ln; print_current_string; print_fam_and_char(p);
+@y
+  math_char, math_jchar: begin print_ln; print_current_string;
+    print_fam_and_char(p,math_type(p));
+@z
+
+@x [34.696] l.14327 - pTeX: print_fam_and_char
+accent_noad: begin print_esc("accent"); print_fam_and_char(accent_chr(p));
+@y
+accent_noad: begin print_esc("accent");
+  print_fam_and_char(accent_chr(p),math_char);
+@z
+
+@x [35.715] l.14687 - pTeX: rebox
+  begin if type(b)=vlist_node then b:=hpack(b,natural);
+  p:=list_ptr(b);
+  if (is_char_node(p))and(link(p)=null) then
+    begin f:=font(p); v:=char_width(f)(char_info(f)(character(p)));
+    if v<>width(b) then link(p):=new_kern(width(b)-v);
+    end;
+@y
+  begin if type(b)<>hlist_node then b:=hpack(b,natural);
+  p:=list_ptr(b);
+  if is_char_node(p) then
+    if font_dir[font(p)]<>dir_default then
+      begin if link(link(p))=null then
+        begin f:=font(p); v:=char_width(f)(orig_char_info(f)(character(p)));
+        if v<>width(b) then link(link(p)):=new_kern(width(b)-v);
+        end
+      end
+    else if link(p)=null then
+      begin f:=font(p); v:=char_width(f)(orig_char_info(f)(character(p)));
+      if v<>width(b) then link(p):=new_kern(width(b)-v);
+      end;
+  delete_glue_ref(space_ptr(b)); delete_glue_ref(xspace_ptr(b));
+@z
+
+@x [36.720] l.14783 - pTeX: clean_box
+function clean_box(@!p:pointer;@!s:small_number):pointer;
+@y
+function clean_box(@!p:pointer;@!s:small_number;@!jc:halfword):pointer;
+@z
+
+@x [36.720] l.14790 - pTeX: clean_box
+math_char: begin cur_mlist:=new_noad; mem[nucleus(cur_mlist)]:=mem[p];
+  end;
+@y
+math_char: begin cur_mlist:=new_noad; mem[nucleus(cur_mlist)]:=mem[p];
+  end;
+math_jchar: begin cur_mlist:=new_noad; mem[nucleus(cur_mlist)]:=mem[p];
+  math_kcode(cur_mlist):=jc;
+  end;
+@z
+
+@x [36.720] l.14802 - pTeX: clean_box
+found: if is_char_node(q)or(q=null) then x:=hpack(q,natural)
+  else if (link(q)=null)and(type(q)<=vlist_node)and(shift_amount(q)=0) then
+    x:=q {it's already clean}
+  else x:=hpack(q,natural);
+@y
+found: if is_char_node(q)or(q=null) then x:=hpack(q,natural)
+  else if (link(q)=null)and(type(q)<=dir_node)and(shift_amount(q)=0) then
+    x:=q {it's already clean}
+  else x:=hpack(q,natural);
+@z
+
+@x [36.721] l.14814 - pTeX: skip 2nd kanji node
+if is_char_node(q) then
+  begin r:=link(q);
+@y
+if is_char_node(q) then
+  begin if font_dir[font(q)]<>dir_default then q:=link(q);
+  r:=link(q);
+@z
+
+@x [36.722] l.14833 - pTeX: fetch
+else  begin if (qo(cur_c)>=font_bc[cur_f])and(qo(cur_c)<=font_ec[cur_f]) then
+    cur_i:=orig_char_info(cur_f)(cur_c)
+  else cur_i:=null_character;
+  if not(char_exists(cur_i)) then
+    begin char_warning(cur_f,qo(cur_c));
+    math_type(a):=empty;
+    end;
+  end;
+@y
+else  begin if font_dir[cur_f]<>dir_default then
+    cur_c:=qi(get_jfm_pos(KANJI(math_kcode_nucleus(a)),cur_f));
+  if (qo(cur_c)>=font_bc[cur_f])and(qo(cur_c)<=font_ec[cur_f]) then
+    cur_i:=orig_char_info(cur_f)(cur_c)
+  else cur_i:=null_character;
+  if not(char_exists(cur_i)) then
+    begin char_warning(cur_f,qo(cur_c));
+    math_type(a):=empty;
+    end;
+  end;
+@z
+
+@x [36.726] l.14892 - pTeX: mlist_to_hlist
+var mlist:pointer; {beginning of the given list}
+@!penalties:boolean; {should penalty nodes be inserted?}
+@!style:small_number; {the given style}
+@y
+var mlist:pointer; {beginning of the given list}
+@!penalties:boolean; {should penalty nodes be inserted?}
+@!style:small_number; {the given style}
+@!u:pointer; {temporary register}
+@z
+
+@x [36.726] l.14913 - pTeX: mlist_to_hlist
+@<Make a second pass over the mlist, removing all noads and inserting the
+  proper spacing and penalties@>;
+end;
+@y
+@<Make a second pass over the mlist, removing all noads and inserting the
+  proper spacing and penalties@>;
+p:=new_null_box; link(p):=link(temp_head);
+adjust_hlist(p,false); link(temp_head):=link(p);
+delete_glue_ref(space_ptr(p)); delete_glue_ref(xspace_ptr(p));
+free_node(p,box_node_size);
+end;
+@z
+
+@x [36.727] l.14928 - pTeX: free box
+free_node(z,box_node_size);
+@y
+delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
+free_node(z,box_node_size);
+@z
+
+@x [36.730] l.14976 - pTeX: free box: disp_node
+kern_node: begin math_kern(q,cur_mu); goto done_with_node;
+  end;
+@y
+kern_node: begin math_kern(q,cur_mu); goto done_with_node;
+  end;
+disp_node: goto done_with_node;
+@z
+
+@x [36.734] l.15046 - pTeX: make_over:clean_box
+  overbar(clean_box(nucleus(q),cramped_style(cur_style)),@|
+@y
+  overbar(clean_box(nucleus(q),cramped_style(cur_style),math_kcode(q)),@|
+@z
+
+@x [36.735] l.15055 - pTeX: make_under:clean_box
+begin x:=clean_box(nucleus(q),cur_style);
+@y
+begin x:=clean_box(nucleus(q),cur_style,math_kcode(q));
+@z
+
+@x [36.736] l.15069 - pTeX: make_under:clean_box
+if type(v)<>vlist_node then confusion("vcenter");
+@y
+if type(v)=dir_node then
+  begin if type(list_ptr(v))<>vlist_node then confusion("dircenter")
+  end
+else  begin if type(v)<>vlist_node then confusion("vcenter")
+  end;
+@z
+
+@x [36.737] l.15089 - pTeX: make_radical:clean_box
+begin x:=clean_box(nucleus(q),cramped_style(cur_style));
+@y
+begin x:=clean_box(nucleus(q),cramped_style(cur_style),math_kcode(q));
+@z
+
+@x [36.738] l.15123 - pTeX: make_math_accent:clean_box
+  x:=clean_box(nucleus(q),cramped_style(cur_style)); w:=width(x); h:=height(x);
+@y
+  x:=clean_box(nucleus(q),cramped_style(cur_style),math_kcode(q));
+  w:=width(x); h:=height(x);
+@z
+
+@x [36.742] l.15186 - pTeX: make_math_accent:clean_box
+x:=clean_box(nucleus(q),cur_style); delta:=delta+height(x)-h; h:=height(x);
+@y
+x:=clean_box(nucleus(q),cur_style,math_kcode(q));
+delta:=delta+height(x)-h; h:=height(x);
+@z
+
+@x [36.744] l.15211 - pTeX: make_fraction:clean_box
+x:=clean_box(numerator(q),num_style(cur_style));
+z:=clean_box(denominator(q),denom_style(cur_style));
+@y
+x:=clean_box(numerator(q),num_style(cur_style),math_kcode(q));
+z:=clean_box(denominator(q),denom_style(cur_style),math_kcode(q));
+@z
+
+@x [36.749] l.15304 - pTeX: make_op:clean_box
+  delta:=char_italic(cur_f)(cur_i); x:=clean_box(nucleus(q),cur_style);
+@y
+  delta:=char_italic(cur_f)(cur_i);
+  x:=clean_box(nucleus(q),cur_style,math_kcode(q));
+@z
+
+@x [36.750] l.15321 - pTeX: make_op:clean_box
+begin x:=clean_box(supscr(q),sup_style(cur_style));
+y:=clean_box(nucleus(q),cur_style);
+z:=clean_box(subscr(q),sub_style(cur_style));
+@y
+begin x:=clean_box(supscr(q),sup_style(cur_style),math_kcode(q));
+y:=clean_box(nucleus(q),cur_style,math_kcode(q));
+z:=clean_box(subscr(q),sub_style(cur_style),math_kcode(q));
+@z
+
+@x [36.751] l.15342 - pTeX: free box node
+  begin free_node(x,box_node_size); list_ptr(v):=y;
+  end
+@y
+  begin
+    delete_glue_ref(space_ptr(x)); delete_glue_ref(xspace_ptr(x));
+    free_node(x,box_node_size); list_ptr(v):=y;
+  end
+@z
+
+@x [36.751] l.15350 - pTeX: free box node
+if math_type(subscr(q))=empty then free_node(z,box_node_size)
+@y
+if math_type(subscr(q))=empty then begin
+  delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
+  free_node(z,box_node_size)
+end
+@z
+
+@x [36.752] l.15369 - pTeX: make_ord
+procedure make_ord(@!q:pointer);
+label restart,exit;
+var a:integer; {address of lig/kern instruction}
+@!p,@!r:pointer; {temporary registers for list manipulation}
+begin restart:@t@>@;@/
+if math_type(subscr(q))=empty then if math_type(supscr(q))=empty then
+ if math_type(nucleus(q))=math_char then
+  begin p:=link(q);
+  if p<>null then if (type(p)>=ord_noad)and(type(p)<=punct_noad) then
+    if math_type(nucleus(p))=math_char then
+    if fam(nucleus(p))=fam(nucleus(q)) then
+      begin math_type(nucleus(q)):=math_text_char;
+      fetch(nucleus(q));
+      if char_tag(cur_i)=lig_tag then
+        begin a:=lig_kern_start(cur_f)(cur_i);
+        cur_c:=character(nucleus(p));
+        cur_i:=font_info[a].qqqq;
+        if skip_byte(cur_i)>stop_flag then
+          begin a:=lig_kern_restart(cur_f)(cur_i);
+          cur_i:=font_info[a].qqqq;
+          end;
+        loop@+ begin @<If instruction |cur_i| is a kern with |cur_c|, attach
+            the kern after~|q|; or if it is a ligature with |cur_c|, combine
+            noads |q| and~|p| appropriately; then |return| if the cursor has
+            moved past a noad, or |goto restart|@>;
+          if skip_byte(cur_i)>=stop_flag then return;
+          a:=a+qo(skip_byte(cur_i))+1;
+          cur_i:=font_info[a].qqqq;
+          end;
+        end;
+      end;
+  end;
+exit:end;
+@y
+procedure make_ord(@!q:pointer);
+label restart,exit;
+var a:integer; {address of lig/kern instruction}
+@!gp,@!gq,@!p,@!r:pointer; {temporary registers for list manipulation}
+@!rr:halfword;
+begin restart:@t@>@;@/
+if (math_type(subscr(q))=empty)and(math_type(supscr(q))=empty)and@|
+((math_type(nucleus(q))=math_char)or(math_type(nucleus(q))=math_jchar)) then
+  begin p:=link(q);
+  if p<>null then if (type(p)>=ord_noad)and(type(p)<=punct_noad) then
+   if fam(nucleus(p))=fam(nucleus(q)) then
+    if math_type(nucleus(p))=math_char then
+      begin math_type(nucleus(q)):=math_text_char;
+      fetch(nucleus(q));
+      if char_tag(cur_i)=lig_tag then
+        begin a:=lig_kern_start(cur_f)(cur_i);
+        cur_c:=character(nucleus(p));
+        cur_i:=font_info[a].qqqq;
+        if skip_byte(cur_i)>stop_flag then
+          begin a:=lig_kern_restart(cur_f)(cur_i);
+          cur_i:=font_info[a].qqqq;
+          end;
+        loop@+ begin @<If instruction |cur_i| is a kern with |cur_c|, attach
+            the kern after~|q|; or if it is a ligature with |cur_c|, combine
+            noads |q| and~|p| appropriately; then |return| if the cursor has
+            moved past a noad, or |goto restart|@>;
+          if skip_byte(cur_i)>=stop_flag then return;
+          a:=a+qo(skip_byte(cur_i))+1;
+          cur_i:=font_info[a].qqqq;
+          end;
+        end;
+      end
+    else  if math_type(nucleus(p))=math_jchar then
+      begin math_type(nucleus(q)):=math_text_jchar;
+      fetch(nucleus(p)); a:=cur_c; fetch(nucleus(q));
+      if char_tag(cur_i)=gk_tag then
+        begin cur_c:=a; a:=glue_kern_start(cur_f)(cur_i);
+        {|cur_c|:=qi(|get_jfm_pos|(|math_kcode|(p),
+                   |fam_fnt|(fam(nucleus(p))+|cur_size|)));}
+        repeat
+         cur_i:=font_info[a].qqqq;
+         if next_char(cur_i)=cur_c then
+         if op_byte(cur_i)<kern_flag then
+           begin gp:=font_glue[cur_f]; rr:=rem_byte(cur_i);
+           if gp<>null then begin
+             while((type(gp)<>rr)and(link(gp)<>null)) do begin gp:=link(gp);
+               end;
+             gq:=glue_ptr(gp);
+             end
+           else begin gp:=get_node(small_node_size);
+             font_glue[cur_f]:=gp; gq:=null;
+             end;
+           if gq=null then
+             begin type(gp):=rr; gq:=new_spec(zero_glue); glue_ptr(gp):=gq;
+             a:=exten_base[cur_f]+qi((qo(rr))*3); width(gq):=font_info[a].sc;
+             stretch(gq):=font_info[a+1].sc; shrink(gq):=font_info[a+2].sc;
+             add_glue_ref(gq); link(gp):=get_node(small_node_size);
+             gp:=link(gp); glue_ptr(gp):=null; link(gp):=null;
+             end;
+           p:=new_glue(gq); link(p):=link(q); link(q):=p; return;
+           end
+         else begin p:=new_kern(char_kern(cur_f)(cur_i));
+           link(p):=link(q); link(q):=p; return;
+           end;
+         incr(a);
+        until skip_byte(cur_i)>=stop_flag;
+        end;
+      end;
+  end;
+exit:end;
+@z
+
+@x [36.754] l.15452 - pTeX:
+math_char, math_text_char:
+@y
+math_char, math_text_char, math_jchar, math_text_jchar:
+@z
+
+@x [36.755] l.15475 - pTeX: convert math text to KANJI char_node
+  begin delta:=char_italic(cur_f)(cur_i); p:=new_character(cur_f,qo(cur_c));
+  if (math_type(nucleus(q))=math_text_char)and(space(cur_f)<>0) then
+    delta:=0; {no italic correction in mid-word of text font}
+  if (math_type(subscr(q))=empty)and(delta<>0) then
+    begin link(p):=new_kern(delta); delta:=0;
+@y
+  begin delta:=char_italic(cur_f)(cur_i); p:=new_character(cur_f,qo(cur_c));
+  u:=p;
+  if font_dir[cur_f]<>dir_default then begin
+    link(u):=get_avail; u:=link(u); info(u):=math_kcode(q);
+  end;
+  if ((math_type(nucleus(q))=math_text_char)or
+      (math_type(nucleus(q))=math_text_jchar))and(space(cur_f)<>0) then
+    delta:=0; {no italic correction in mid-word of text font}
+  if (math_type(subscr(q))=empty)and(delta<>0) then begin
+    link(u):=new_kern(delta); delta:=0;
+@z
+
+@x [36.756] l.15505 - pTeX: free box
+  shift_down:=depth(z)+sub_drop(t);
+  free_node(z,box_node_size);
+  end;
+@y
+  shift_down:=depth(z)+sub_drop(t);
+  delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
+  free_node(z,box_node_size);
+  end;
+@z
+
+@x [36.757] l.15526 - pTeX: make_scripts:clean_box
+begin x:=clean_box(subscr(q),sub_style(cur_style));
+@y
+begin x:=clean_box(subscr(q),sub_style(cur_style),math_kcode(q));
+@z
+
+@x [36.758] l.15538 - pTeX: make_scripts:clean_box
+begin x:=clean_box(supscr(q),sup_style(cur_style));
+@y
+begin x:=clean_box(supscr(q),sup_style(cur_style),math_kcode(q));
+@z
+
+@x [36.758] l.15555 - pTeX: make_scripts:clean_box
+begin y:=clean_box(subscr(q),sub_style(cur_style));
+@y
+begin y:=clean_box(subscr(q),sub_style(cur_style),math_kcode(q));
+@z
+
+@x [36.760] l.15616 - pTeX: disp_node
+othercases confusion("mlist3")
+@y
+disp_node: begin link(p):=q; p:=q; q:=link(q); link(p):=null; goto done;
+  end;
+othercases confusion("mlist3")
+@z
+
+@x [37.796] l.16276 - pTeX: call adjust_hlist
+  begin adjust_tail:=cur_tail; u:=hpack(link(head),natural); w:=width(u);
+@y
+  begin adjust_tail:=cur_tail; adjust_hlist(head,false);
+  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+  cur_kanji_skip:=space_ptr(head); cur_xkanji_skip:=xspace_ptr(head);
+  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+  u:=hpack(link(head),natural); w:=width(u);
+@z
+
+@x [37.799] l.16331 - pTeX: call adjust_hlist
+  begin p:=hpack(link(head),natural);
+@y
+  begin adjust_hlist(head,false);
+  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+  cur_kanji_skip:=space_ptr(head); cur_xkanji_skip:=xspace_ptr(head);
+  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+  p:=hpack(link(head),natural);
+@z
+
+@x [37.800] l.16353 - pTeX: call adjust_hlist
+var @!p,@!q,@!r,@!s,@!u,@!v: pointer; {registers for the list operations}
+@y
+var @!p,@!q,@!r,@!s,@!u,@!v,@!z: pointer; {registers for the list operations}
+@z
+
+@x [37.804] l.16456 - pTeX: call adjust_hlist
+  p:=hpack(preamble,saved(1),saved(0)); overfull_rule:=rule_save;
+@y
+  z:=new_null_box; link(z):=preamble;
+  adjust_hlist(z,false);
+  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+  cur_kanji_skip:=space_ptr(z); cur_xkanji_skip:=xspace_ptr(z);
+  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+  p:=hpack(preamble,saved(1),saved(0)); overfull_rule:=rule_save;
+  delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
+  free_node(z,box_node_size);
+@z
+
+@x [37.807] l.16499 - pTeX: unset box -> BOX
+glue_order(q):=glue_order(p); glue_sign(q):=glue_sign(p);
+glue_set(q):=glue_set(p); shift_amount(q):=o;
+r:=link(list_ptr(q)); s:=link(list_ptr(p));
+@y
+box_dir(q):=abs(direction);
+glue_order(q):=glue_order(p); glue_sign(q):=glue_sign(p);
+glue_set(q):=glue_set(p); shift_amount(q):=o;
+r:=link(list_ptr(q)); s:=link(list_ptr(p));
+@z
+
+@x [37.809] l.16541 - pTeX: unset box -> BOX
+s:=link(s); link(u):=new_null_box; u:=link(u); t:=t+width(s);
+if mode=-vmode then width(u):=width(s)@+else
+  begin type(u):=vlist_node; height(u):=width(s);
+  end
+@y
+s:=link(s); link(u):=new_null_box; u:=link(u); t:=t+width(s);
+if mode=-vmode then width(u):=width(s)@+else
+  begin type(u):=vlist_node; height(u):=width(s);
+  end;
+box_dir(u):=abs(direction)
+@z
+
+@x [37.810] l.16564 - pTeX: unset box -> BOX
+width(r):=w; type(r):=hlist_node;
+end
+@y
+width(r):=w; type(r):=hlist_node;
+box_dir(r):=abs(direction);
+end
+@z
+
+@x [37.811] l.16585 - pTeX: unset box -> BOX
+height(r):=w; type(r):=vlist_node;
+@y
+height(r):=w; type(r):=vlist_node;
+box_dir(r):=abs(direction);
+@z
+
+@x [38.816] l.16687 - pTeX: init chain, delete disp_node
+link(temp_head):=link(head);
+if is_char_node(tail) then tail_append(new_penalty(inf_penalty))
+else if type(tail)<>glue_node then tail_append(new_penalty(inf_penalty))
+@y
+first_use:=true; chain:=false;
+delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+cur_kanji_skip:=space_ptr(head); cur_xkanji_skip:=xspace_ptr(head);
+add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+link(temp_head):=link(head);
+if (not is_char_node(tail))and(type(tail)=disp_node) then
+  begin free_node(tail,small_node_size); tail:=prev_node; link(tail):=null
+  end;
+if is_char_node(tail) then tail_append(new_penalty(inf_penalty))
+else if type(tail)<>glue_node then tail_append(new_penalty(inf_penalty))
+@z
+
+@x [38.828] l.16946 - pTeX: Global variable |chain|
+@!cur_p:pointer; {the current breakpoint under consideration}
+@y
+@!cur_p:pointer; {the current breakpoint under consideration}
+@!chain:boolean; {chain current line and next line?}
+@z
+
+% chain ¤¬¿¿¤Î¾ì¹ç¡¢¸å¤í¤Ë cur_kanji_skip ¤¬ÁÞÆþ¤µ¤ì¤ë¤Î¤Ç¡¢¤³¤³¤Ç
+% break_width ¤«¤é°ú¤¤¤Æ¤ª¤«¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
+@x [38.837] l.17125 - pTeX: add kanji_skip width, ita_kern
+begin no_break_yet:=false; do_all_six(set_break_width_to_background);
+s:=cur_p;
+if break_type>unhyphenated then if cur_p<>null then
+  @<Compute the discretionary |break_width| values@>;
+while s<>null do
+  begin if is_char_node(s) then goto done;
+@y
+begin no_break_yet:=false; do_all_six(set_break_width_to_background);
+s:=cur_p;
+if break_type>unhyphenated then if cur_p<>null then
+  @<Compute the discretionary |break_width| values@>;
+while s<>null do
+  begin if is_char_node(s) then
+    begin if chain then
+      begin break_width[1]:=break_width[1]-width(cur_kanji_skip);
+      break_width[2+stretch_order(cur_kanji_skip)]:=
+         break_width[2+stretch_order(cur_kanji_skip)]-stretch(cur_kanji_skip);
+      break_width[6]:=break_width[6]-shrink(cur_kanji_skip);
+      end;
+    goto done end;
+@z
+
+@x [38.837] l.17135 - pTeX:
+  kern_node: if subtype(s)<>explicit then goto done
+    else break_width[1]:=break_width[1]-width(s);
+@y
+  kern_node: if (subtype(s)<>explicit)and(subtype(s)<>ita_kern) then
+    goto done
+    else break_width[1]:=break_width[1]-width(s);
+@z
+
+@x [38.841] l.17186 - pTeX:
+if is_char_node(v) then
+  begin f:=font(v);
+  break_width[1]:=break_width[1]-char_width(f)(char_info(f)(character(v)));
+  end
+else  case type(v) of
+  ligature_node: begin f:=font(lig_char(v));@/
+    break_width[1]:=@|break_width[1]-
+      char_width(f)(char_info(f)(character(lig_char(v))));
+    end;
+  hlist_node,vlist_node,rule_node,kern_node:
+    break_width[1]:=break_width[1]-width(v);
+  othercases confusion("disc1")
+@:this can't happen disc1}{\quad disc1@>
+  endcases
+@y
+if is_char_node(v) then
+  begin f:=font(v);
+  break_width[1]:=break_width[1]-char_width(f)(orig_char_info(f)(character(v)));
+  if font_dir[f]<>dir_default then v:=link(v);
+  end
+else case type(v) of
+  ligature_node: begin f:=font(lig_char(v));@/
+    break_width[1]:=@|break_width[1]-
+      char_width(f)(orig_char_info(f)(character(lig_char(v))));
+    end;
+  hlist_node,vlist_node,dir_node,rule_node,kern_node:
+    break_width[1]:=break_width[1]-width(v);
+  disp_node: do_nothing;
+  othercases confusion("disc1")
+@:this can't happen disc1}{\quad disc1@>
+  endcases
+@z
+
+@x [38.842] l.17204 - pTeX:
+  break_width[1]:=@|break_width[1]+char_width(f)(char_info(f)(character(s)));
+  end
+else  case type(s) of
+  ligature_node: begin f:=font(lig_char(s));
+    break_width[1]:=break_width[1]+
+      char_width(f)(char_info(f)(character(lig_char(s))));
+    end;
+  hlist_node,vlist_node,rule_node,kern_node:
+    break_width[1]:=break_width[1]+width(s);
+@y
+  break_width[1]:=@|break_width[1]+char_width(f)(orig_char_info(f)(character(s)));
+  if font_dir[f]<>dir_default then s:=link(s);
+  end
+else  case type(s) of
+  ligature_node: begin f:=font(lig_char(s));
+    break_width[1]:=break_width[1]+
+      char_width(f)(orig_char_info(f)(character(lig_char(s))));
+    end;
+  hlist_node,vlist_node,dir_node,rule_node,kern_node:
+    break_width[1]:=break_width[1]+width(s);
+  disp_node: do_nothing;
+@z
+
+@x [38.856] l.17467 - pTeX: print symbolic feasibe node
+if cur_p=null then print_esc("par")
+else if type(cur_p)<>glue_node then
+  begin if type(cur_p)=penalty_node then print_esc("penalty")
+  else if type(cur_p)=disc_node then print_esc("discretionary")
+@y
+if cur_p=null then print_esc("par")
+else if (type(cur_p)<>glue_node)and(not is_char_node(cur_p)) then
+  begin if type(cur_p)=penalty_node then print_esc("penalty")
+  else if type(cur_p)=disc_node then print_esc("discretionary")
+@z
+
+@x [39.862] l.17584 - pTeX: local valiable for line breaking
+@!auto_breaking:boolean; {is node |cur_p| outside a formula?}
+@!prev_p:pointer; {helps to determine when glue nodes are breakpoints}
+@!q,@!r,@!s,@!prev_s:pointer; {miscellaneous nodes of temporary interest}
+@!f:internal_font_number; {used when calculating character widths}
+@y
+@!auto_breaking:boolean; {is node |cur_p| outside a formula?}
+@!prev_p:pointer; {helps to determine when glue nodes are breakpoints}
+@!q,@!r,@!s,@!prev_s:pointer; {miscellaneous nodes of temporary interest}
+@!f,@!post_f:internal_font_number; {used when calculating character widths}
+@!post_p:pointer;
+@!cc:ASCII_code;
+@!first_use:boolean;
+@z
+
+@x [39.866] l.17677 - pTeX: dir_node, disp_node, ita_kern
+case type(cur_p) of
+hlist_node,vlist_node,rule_node: act_width:=act_width+width(cur_p);
+@y
+case type(cur_p) of
+hlist_node,vlist_node,dir_node,rule_node: act_width:=act_width+width(cur_p);
+@z
+
+@x [39.866] l.17685 - pTeX:
+kern_node: if subtype(cur_p)=explicit then kern_break
+  else act_width:=act_width+width(cur_p);
+@y
+kern_node: if (subtype(cur_p)=explicit)or(subtype(cur_p)=ita_kern) then
+  kern_break
+  else act_width:=act_width+width(cur_p);
+@z
+
+@x [39.866] l.17694 - pTeX:
+mark_node,ins_node,adjust_node: do_nothing;
+@y
+disp_node,mark_node,ins_node,adjust_node: do_nothing;
+@z
+
+% ¤³¤³¤Ç¡¢Ï¢Â³¤¹¤ë´Á»ú¥³¡¼¥É´Ö¤Ë cur_kanji_skip ¤òÁÞÆþ¤¹¤ë¡£
+% penalty_node ¤ä box_node ¤Ë¤Ï¡¢adjust_hlist ¥ë¡¼¥Á¥ó¤Ë¤è¤Ã¤Æ´û¤Ë¼ÂºÝ¤Î
+% glue_node ¤¬ÁÞÆþ¤µ¤ì¤Æ¤¤¤ë¤â¤Î¤È²¾Äꤷ¤Æ¤¤¤ë¡£
+% chain ¤Ï¡¢try_break ¤Ç cur_kanji_skip ¤Î¥¢¥¸¥ã¥¹¥È¤Î¤¿¤á¤Ë»È¤ï¤ì¤ë¡£
+@x [39.867] l.17708 - pTeX: add kanji char width
+@<Advance \(c)|cur_p| to the node following the present string...@>=
+begin prev_p:=cur_p;
+repeat f:=font(cur_p);
+act_width:=act_width+char_width(f)(char_info(f)(character(cur_p)));
+cur_p:=link(cur_p);
+until not is_char_node(cur_p);
+end
+@y
+@<Advance \(c)|cur_p| to the node following the present string...@>=
+begin chain:=false;
+if is_char_node(cur_p) then
+  if font_dir[font(cur_p)]<>dir_default then
+    begin case type(prev_p) of
+    hlist_node,vlist_node,dir_node,rule_node,
+    ligature_node,disc_node,math_node: begin
+      cur_p:=prev_p; try_break(0,unhyphenated); cur_p:=link(cur_p);
+      end;
+    othercases do_nothing;
+    endcases;
+    end;
+  prev_p:=cur_p; post_p:=cur_p; post_f:=font(post_p);
+  repeat f:=post_f; cc:=character(cur_p);
+  act_width:=act_width+char_width(f)(orig_char_info(f)(cc));
+  post_p:=link(cur_p);
+  if font_dir[f]<>dir_default then
+    begin prev_p:=cur_p; cur_p:=post_p; post_p:=link(post_p);
+    if is_char_node(post_p) then
+      begin post_f:=font(post_p);
+      if font_dir[post_f]<>dir_default then chain:=true else chain:=false;
+      try_break(0,unhyphenated);
+      end
+    else
+      begin chain:=false;
+      case type(post_p) of
+      hlist_node,vlist_node,dir_node,rule_node,ligature_node,
+        disc_node,math_node: try_break(0,unhyphenated);
+      othercases do_nothing;
+      endcases;
+      end;
+    if chain then
+      begin if first_use then
+        begin check_shrinkage(cur_kanji_skip);
+        first_use:=false;
+        end;
+      act_width:=act_width+width(cur_kanji_skip);@|
+      active_width[2+stretch_order(cur_kanji_skip)]:=@|
+          active_width[2+stretch_order(cur_kanji_skip)]
+          +stretch(cur_kanji_skip);@/
+      active_width[6]:=active_width[6]+shrink(cur_kanji_skip);
+      end;
+    prev_p:=cur_p;
+    end
+  else  if is_char_node(post_p) then
+    begin post_f:=font(post_p); chain:=false;
+    if font_dir[post_f]<>dir_default then try_break(0,unhyphenated);
+    end;
+  cur_p:=post_p;
+  until not is_char_node(cur_p);
+chain:=false;
+end
+@z
+
+@x [39.868] l.17723 - pTeX: ita_kern
+  else if (type(prev_p)=kern_node)and(subtype(prev_p)<>explicit) then
+    try_break(0,unhyphenated);
+@y
+  else if (type(prev_p)=kern_node) then
+    if (subtype(prev_p)<>explicit)and(subtype(prev_p)<>ita_kern) then
+    try_break(0,unhyphenated);
+@z
+
+@x [39.871] l.17756 - pTeX: add kanji char width, dir_node width, disp_node
+  disc_width:=disc_width+char_width(f)(char_info(f)(character(s)));
+  end
+else  case type(s) of
+  ligature_node: begin f:=font(lig_char(s));
+    disc_width:=disc_width+
+      char_width(f)(char_info(f)(character(lig_char(s))));
+    end;
+  hlist_node,vlist_node,rule_node,kern_node:
+    disc_width:=disc_width+width(s);
+@y
+  disc_width:=disc_width+char_width(f)(orig_char_info(f)(character(s)));
+  if font_dir[f]<>dir_default then s:=link(s)
+  end
+else  case type(s) of
+  ligature_node: begin f:=font(lig_char(s));
+    disc_width:=disc_width+
+      char_width(f)(orig_char_info(f)(character(lig_char(s))));
+    end;
+  hlist_node,vlist_node,dir_node,rule_node,kern_node:
+    disc_width:=disc_width+width(s);
+  disp_node: do_nothing;
+@z
+
+@x [39.872] l.17772 - pTeX: add kanji char width, dir_node width, disp_node
+  act_width:=act_width+char_width(f)(char_info(f)(character(s)));
+  end
+else  case type(s) of
+  ligature_node: begin f:=font(lig_char(s));
+    act_width:=act_width+
+      char_width(f)(char_info(f)(character(lig_char(s))));
+    end;
+  hlist_node,vlist_node,rule_node,kern_node:
+    act_width:=act_width+width(s);
+@y
+  act_width:=act_width+char_width(f)(orig_char_info(f)(character(s)));
+  if font_dir[f]<>dir_default then s:=link(s)
+  end
+else  case type(s) of
+  ligature_node: begin f:=font(lig_char(s));
+    act_width:=act_width+
+      char_width(f)(orig_char_info(f)(character(lig_char(s))));
+    end;
+  hlist_node,vlist_node,dir_node,rule_node,kern_node:
+    act_width:=act_width+width(s);
+  disp_node: do_nothing;
+@z
+
+@x [39.877] l.17879 - pTeX: last_disp
+cur_line:=prev_graf+1;
+@y
+cur_line:=prev_graf+1; last_disp:=0;
+@z
+
+@x [39.879] l.17919 - pTeX: ita_kern
+  if type(q)=kern_node then if subtype(q)<>explicit then goto done1;
+@y
+  if type(q)=kern_node then
+    if (subtype(q)<>explicit)and(subtype(q)<>ita_kern) then goto done1;
+@z
+
+@x [39.881] l.17950 - pTeX: |q| may be a |char_node|
+if q<>null then {|q| cannot be a |char_node|}
+  if type(q)=glue_node then
+    begin delete_glue_ref(glue_ptr(q));
+    glue_ptr(q):=right_skip;
+    subtype(q):=right_skip_code+1; add_glue_ref(right_skip);
+    goto done;
+    end
+  else  begin if type(q)=disc_node then
+      @<Change discretionary to compulsory and set
+        |disc_break:=true|@>
+    else if type(q)=kern_node then width(q):=0
+    else if type(q)=math_node then
+      begin width(q):=0;
+      if TeXXeT_en then @<Adjust \(t)the LR stack for the |p...@>;
+      end;
+    end
+@y
+if q<>null then {|q| may be a |char_node|}
+  begin if not is_char_node(q) then
+    if type(q)=glue_node then
+      begin delete_glue_ref(glue_ptr(q));
+      glue_ptr(q):=right_skip;
+      subtype(q):=right_skip_code+1; add_glue_ref(right_skip);
+      goto done;
+      end
+    else  begin if type(q)=disc_node then
+        @<Change discretionary to compulsory and set
+          |disc_break:=true|@>
+      else if type(q)=kern_node then width(q):=0
+      else if type(q)=math_node then
+        begin width(q):=0;
+        if TeXXeT_en then @<Adjust \(t)the LR stack for the |p...@>;
+        end;
+      end
+  end
+@z
+
+@x [39.887] l.18014 - pTeX: disp_node at begin-of-line
+r:=link(q); link(q):=null; q:=link(temp_head); link(temp_head):=r;
+@y
+r:=link(q); link(q):=null; q:=link(temp_head); link(temp_head):=r;
+if last_disp<>0 then begin
+  r:=get_node(small_node_size);
+  type(r):=disp_node; disp_dimen(r):=last_disp;
+  link(r):=q; q:=r;
+  end;
+@z
+
+@x [40.896] l.18177 - pTeX: hyphenation
+loop@+  begin if is_char_node(s) then
+    begin c:=qo(character(s)); hf:=font(s);
+    end
+@y
+loop@+  begin if is_char_node(s) then
+    begin hf:=font(s);
+    if font_dir[hf]<>dir_default then
+      begin prev_s:=s; s:=link(prev_s); c:=info(s); goto continue;
+      end else c:=qo(character(s));
+    end
+  else if type(s)=disp_node then goto continue
+  else if (type(s)=penalty_node)and(not subtype(s)=normal) then goto continue
+@z
+
+@x [40.899] l.18248 - pTeX: disp_node
+    whatsit_node,glue_node,penalty_node,ins_node,adjust_node,mark_node:
+      goto done4;
+@y
+    disp_node: do_nothing;
+    whatsit_node,glue_node,penalty_node,ins_node,adjust_node,mark_node:
+      goto done4;
+@z
+
+@x [44.968] l.19535 - pTeX: dir_node
+  hlist_node,vlist_node,rule_node:@<Insert glue for |split_top_skip|
+    and set~|p:=null|@>;
+@y
+  hlist_node,vlist_node,dir_node,rule_node:
+    @<Insert glue for |split_top_skip| and set~|p:=null|@>;
+@z
+
+@x [44.973] l.19626 - pTeX: dir_node
+hlist_node,vlist_node,rule_node: begin@t@>@;@/
+  cur_height:=cur_height+prev_dp+height(p); prev_dp:=depth(p);
+@y
+hlist_node,vlist_node,dir_node,rule_node: begin@t@>@;@/
+  cur_height:=cur_height+prev_dp+height(p); prev_dp:=depth(p);
+@z
+
+@x [44.977] l.19710 - pTeX: free box node
+var v:pointer; {the box to be split}
+@y
+var v:pointer; {the box to be split}
+w:pointer; {|dir_node|}
+@z
+
+@x [44.977] l.19722 - pTeX: free box node
+q:=prune_page_top(q); p:=list_ptr(v); free_node(v,box_node_size);
+if q=null then box(n):=null {the |eq_level| of the box stays the same}
+else box(n):=vpack(q,natural);
+vsplit:=vpackage(p,h,exactly,split_max_depth);
+@y
+q:=prune_page_top(q,saving_vdiscards>0); p:=list_ptr(v);
+if q<>null then begin
+    q:=vpack(q,natural); box_dir(q):=box_dir(v);
+  end;
+change_box(q);
+q:=vpackage(p,h,exactly,split_max_depth);
+box_dir(q):=box_dir(v);
+delete_glue_ref(space_ptr(v)); delete_glue_ref(xspace_ptr(v));
+free_node(v,box_node_size);
+vsplit:=q;
+@z
+
+@x [44.978] l.19732 - pTeX: bad box for vsplit
+if type(v)<>vlist_node then
+  begin print_err(""); print_esc("vsplit"); print(" needs a ");
+  print_esc("vbox");
+@:vsplit_}{\.{\\vsplit needs a \\vbox}@>
+  help2("The box you are trying to split is an \hbox.")@/
+  ("I can't split such a box, so I'll leave it alone.");
+  error; vsplit:=null; return;
+  end
+@y
+if type(v)=dir_node then begin
+  w:=v; v:=list_ptr(v);
+  delete_glue_ref(space_ptr(w));
+  delete_glue_ref(xspace_ptr(w));
+  free_node(w,box_node_size);
+end;
+if type(v)<>vlist_node then begin
+  print_err(""); print_esc("vsplit"); print(" needs a ");
+  print_esc("vbox");
+@:vsplit_}{\.{\\vsplit needs a \\vbox}@>
+  help2("The box you are trying to split is an \hbox.")@/
+  ("I can't split such a box, so I'll leave it alone.");
+  error; vsplit:=null; return;
+end;
+flush_node_list(link(v)); link(v):=null
+@z
+
+@x [45.993] l.20053 - pTeX: ensure_vbox
+begin p:=box(n);
+if p<>null then if type(p)=hlist_node then
+  begin print_err("Insertions can only be added to a vbox");
+@y
+begin p:=box(n);
+if p<>null then if (type(p)=dir_node) then
+  begin p:=list_ptr(p);
+  delete_glue_ref(space_ptr(box(n)));
+  delete_glue_ref(xspace_ptr(box(n)));
+  free_node(box(n),box_node_size);
+  box(n):=p
+end;
+if p<>null then if type(p)<>vlist_node then begin
+  print_err("Insertions can only be added to a vbox");
+@z
+
+@x [45.1000] l.20146 - pTeX: dir_node
+hlist_node,vlist_node,rule_node: if page_contents<box_there then
+    @<Initialize the current page, insert the \.{\\topskip} glue
+      ahead of |p|, and |goto continue|@>
+@y
+hlist_node,vlist_node,dir_node,rule_node: if page_contents<box_there then
+    @<Initialize the current page, insert the \.{\\topskip} glue
+      ahead of |p|, and |goto continue|@>
+@z
+
+@x [45.1009] l.20291 - pTeX: ins_dir
+if box(n)=null then height(r):=0
+else height(r):=height(box(n))+depth(box(n));
+@y
+if box(n)=null then height(r):=0
+else
+  begin if ins_dir(p)<>box_dir(box(n)) then
+    begin print_err("Insertions can only be added to a same direction vbox");
+@.Insertions can only...@>
+    help3("Tut tut: You're trying to \insert into a")@/
+      ("\box register that now have a different direction.")@/
+      ("Proceed, and I'll discard its present contents.");
+    box_error(n)
+    end
+  else
+    height(r):=height(box(n))+depth(box(n));
+  end;
+@z
+
+@x [45.1017] l.20470 - pTeX: page dir
+box(255):=vpackage(link(page_head),best_size,exactly,page_max_depth);
+@y
+box(255):=vpackage(link(page_head),best_size,exactly,page_max_depth);
+box_dir(box(255)):=page_dir;
+@z
+
+@x [45.1020] l.20513 - pTeX: check ins_dir
+if best_ins_ptr(r)=null then wait:=true
+else  begin wait:=false; s:=last_ins_ptr(r); link(s):=ins_ptr(p);
+@y
+if best_ins_ptr(r)=null then wait:=true
+else  begin wait:=false;
+  n:=qo(subtype(p));
+  case box_dir(box(n)) of
+    any_dir:
+      if ins_dir(p)<>box_dir(box(n)) then begin
+        print_err("Insertions can only be added to a same direction vbox");
+@.Insertions can only...@>
+        help3("Tut tut: You're trying to \insert into a")@/
+          ("\box register that now have a different direction.")@/
+          ("Proceed, and I'll discard its present contents.");
+        box_error(n);
+        box(n):=new_null_box; last_ins_ptr(r):=box(n)+list_offset;
+      end;
+    othercases
+      box_dir(box(n)):=ins_dir(p);
+  endcases;
+  s:=last_ins_ptr(r); link(s):=ins_ptr(p);
+@z
+
+@x [45.1021] l.20537 - pTeX: free box node, ins_dir
+      free_node(temp_ptr,box_node_size); wait:=true;
+@y
+      delete_glue_ref(space_ptr(temp_ptr));
+      delete_glue_ref(xspace_ptr(temp_ptr));
+      free_node(temp_ptr,box_node_size); wait:=true;
+@z
+
+@x [45.1021] l.20543 - pTeX: free box node, ins_dir
+free_node(box(n),box_node_size);
+box(n):=vpack(temp_ptr,natural);
+@y
+delete_glue_ref(space_ptr(box(n)));
+delete_glue_ref(xspace_ptr(box(n)));
+flush_node_list(link(box(n)));
+free_node(box(n),box_node_size);
+box(n):=vpack(temp_ptr,natural); box_dir(box(n)):=ins_dir(p);
+@z
+
+@x [46.1030] l.20687 -  pTeX:main_control
+@d append_normal_space=120 {go here to append a normal space between words}
+@y
+@d append_normal_space=120 {go here to append a normal space between words}
+@d main_loop_j=130 {like |main_loop|, but |cur_chr| holds a KANJI code}
+@d skip_loop=141
+@d again_2=150
+@z
+
+@x [46.1030] l.20691 - pTeX: main_control
+procedure main_control; {governs \TeX's activities}
+label big_switch,reswitch,main_loop,main_loop_wrapup,
+@y
+procedure main_control; {governs \TeX's activities}
+label big_switch,reswitch,main_loop,main_loop_wrapup,
+  main_loop_j,main_loop_j+1,main_loop_j+3,skip_loop,again_2,
+@z
+
+@x [46.1030] l.20697 - pTeX: main_control
+var@!t:integer; {general-purpose temporary variable}
+@y
+var@!t:integer; {general-purpose temporary variable}
+@!cx:KANJI_code; {kanji character}
+@!kp:pointer; {kinsoku penalty register}
+@!gp,gq:pointer; {temporary registers for list manipulation}
+@!disp:scaled; {displacement register}
+@!ins_kp:boolean; {whether insert kinsoku penalty}
+@z
+
+@x [46.1030] l.20701 - pTeX: main_control
+case abs(mode)+cur_cmd of
+hmode+letter,hmode+other_char,hmode+char_given: goto main_loop;
+hmode+char_num: begin scan_char_num; cur_chr:=cur_val; goto main_loop;@+end;
+hmode+no_boundary: begin get_x_token;
+  if (cur_cmd=letter)or(cur_cmd=other_char)or(cur_cmd=char_given)or
+   (cur_cmd=char_num) then cancel_boundary:=true;
+  goto reswitch;
+  end;
+@y
+ins_kp:=false;
+case abs(mode)+cur_cmd of
+hmode+letter,hmode+other_char: goto main_loop;
+hmode+kanji,hmode+kana,hmode+other_kchar: goto main_loop_j;
+hmode+char_given:
+  if is_char_ascii(cur_chr) then goto main_loop else goto main_loop_j;
+hmode+char_num: begin scan_char_num; cur_chr:=cur_val;
+  if is_char_ascii(cur_chr) then goto main_loop else goto main_loop_j;
+  end;
+hmode+no_boundary: begin get_x_token;
+  if (cur_cmd=letter)or(cur_cmd=other_char)or
+   (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar)or
+   (cur_cmd=char_given)or(cur_cmd=char_num) then cancel_boundary:=true;
+  goto reswitch;
+  end;
+@z
+
+@x [46.1030] l.20715 - pTeX: main_control
+main_loop:@<Append character |cur_chr| and the following characters (if~any)
+  to the current hlist in the current font; |goto reswitch| when
+  a non-character has been fetched@>;
+@y
+main_loop_j:@<Append KANJI-character |cur_chr|
+  to the current hlist in the current font; |goto reswitch| when
+  a non-character has been fetched@>;
+main_loop:@<Append character |cur_chr| and the following characters (if~any)
+  to the current hlist in the current font; |goto reswitch| when
+  a non-character has been fetched@>;
+@z
+
+@x [46.1034] l.20788 - pTeX: disp_node
+@<Append character |cur_chr|...@>=
+if ((head=tail) and (mode>0)) then begin
+  if (insert_src_special_auto) then append_src_special;
+end;
+adjust_space_factor;@/
+@y
+@<Append character |cur_chr|...@>=
+if ((head=tail) and (mode>0)) then begin
+  if (insert_src_special_auto) then append_src_special;
+end;
+adjust_space_factor;@/
+if direction=dir_tate then disp:=t_baseline_shift else disp:=y_baseline_shift;
+@<Append |disp_node| at begin of displace area@>;
+@z
+
+%@x [46.1035] l.20850 - pTeX: kinsoku penalty
+%@<Make a ligature node, if |ligature_present|;...@>=
+%wrapup(rt_hit)
+%@y
+%@<Make a ligature node, if |ligature_present|;...@>=
+%wrapup(rt_hit);
+%if ins_kp=true then
+%  begin cx:=KANJI(cur_l); @<Insert kinsoku penalty@>;
+%  ins_kp:=false;
+%  end
+%@z
+
+@x [46.1036] l.20854 - pTeX: disp_node
+if lig_stack=null then goto reswitch;
+@y
+if lig_stack=null then
+  begin @<Append |disp_node| at end of displace area@>;
+  goto reswitch;
+  end;
+@z
+
+@x [46.1037] l.20886 - pTeX: Look ahead for another character
+@<Look ahead for another character...@>=
+get_next; {set only |cur_cmd| and |cur_chr|, for speed}
+if cur_cmd=letter then goto main_loop_lookahead+1;
+if cur_cmd=other_char then goto main_loop_lookahead+1;
+if cur_cmd=char_given then goto main_loop_lookahead+1;
+x_token; {now expand and set |cur_cmd|, |cur_chr|, |cur_tok|}
+if cur_cmd=letter then goto main_loop_lookahead+1;
+if cur_cmd=other_char then goto main_loop_lookahead+1;
+if cur_cmd=char_given then goto main_loop_lookahead+1;
+if cur_cmd=char_num then
+  begin scan_char_num; cur_chr:=cur_val; goto main_loop_lookahead+1;
+  end;
+if cur_cmd=no_boundary then bchar:=non_char;
+cur_r:=bchar; lig_stack:=null; goto main_lig_loop;
+main_loop_lookahead+1: adjust_space_factor;
+fast_get_avail(lig_stack); font(lig_stack):=main_f;
+cur_r:=qi(cur_chr); character(lig_stack):=cur_r;
+if cur_r=false_bchar then cur_r:=non_char {this prevents spurious ligatures}
+@y
+@<Look ahead for another character...@>=
+get_next; {set only |cur_cmd| and |cur_chr|, for speed}
+if cur_cmd=letter then goto main_loop_lookahead+1;
+if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+  @<goto |main_lig_loop|@>;
+if cur_cmd=other_char then goto main_loop_lookahead+1;
+if cur_cmd=char_given then
+  begin if is_char_ascii(cur_chr) then goto main_loop_lookahead+1
+  else @<goto |main_lig_loop|@>;
+  end;
+x_token; {now expand and set |cur_cmd|, |cur_chr|, |cur_tok|}
+if cur_cmd=letter then goto main_loop_lookahead+1;
+if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+  @<goto |main_lig_loop|@>;
+if cur_cmd=other_char then goto main_loop_lookahead+1;
+if cur_cmd=char_given then
+  begin if is_char_ascii(cur_chr) then goto main_loop_lookahead+1
+  else @<goto |main_lig_loop|@>;
+  end;
+if cur_cmd=char_num then
+  begin scan_char_num; cur_chr:=cur_val;
+  if is_char_ascii(cur_chr) then goto main_loop_lookahead+1
+  else @<goto |main_lig_loop|@>;
+  end;
+if cur_cmd=inhibit_glue then
+  begin inhibit_glue_flag:=true; goto main_loop_lookahead;
+  end;
+if cur_cmd=no_boundary then bchar:=non_char;
+cur_r:=bchar; lig_stack:=null; goto main_lig_loop;
+main_loop_lookahead+1: adjust_space_factor;
+fast_get_avail(lig_stack); font(lig_stack):=main_f;
+cur_r:=qi(cur_chr); character(lig_stack):=cur_r;
+if cur_r=false_bchar then cur_r:=non_char {this prevents spurious ligatures}
+
+@ @<goto |main_lig_loop|@>=
+begin bchar:=non_char; cur_r:=bchar; lig_stack:=null;
+if ligature_present then pack_lig(rt_hit);
+if ins_kp=true then
+  begin cx:=cur_l; @<Insert kinsoku penalty@>;
+  end;
+ins_kp:=false;
+goto main_loop_j;
+end
+@z
+
+@x [46.1041] l.20999 - pTeX: disp_node
+link(tail):=temp_ptr; tail:=temp_ptr;
+@y
+if (not is_char_node(tail))and(type(tail)=disp_node) then
+  begin link(prev_node):=temp_ptr; link(temp_ptr):=tail; prev_node:=temp_ptr;
+  end
+else begin link(tail):=temp_ptr; tail:=temp_ptr;
+  end;
+@z
+
+@x [46.1043] l.21029 - pTeX: disp_node
+link(tail):=q; tail:=q;
+@y
+if (not is_char_node(tail))and(type(tail)=disp_node) then
+  begin link(prev_node):=q; link(q):=tail; prev_node:=q;
+  end
+else begin link(tail):=q; tail:=q;
+  end
+@z
+
+@x [47.1061] l.21277 - pTeX: append kern
+begin s:=cur_chr; scan_dimen(s=mu_glue,false,false);
+tail_append(new_kern(cur_val)); subtype(tail):=s;
+end;
+@y
+begin s:=cur_chr; scan_dimen(s=mu_glue,false,false);
+if (not is_char_node(tail))and(type(tail)=disp_node) then
+  begin prev_append(new_kern(cur_val)); subtype(prev_node):=s;
+  end
+else
+  begin tail_append(new_kern(cur_val)); subtype(tail):=s;
+  end;
+end;
+@z
+
+@x [47.1068] l.21377 - pTeX:
+var p,@!q:pointer; {for short-term use}
+@y
+var p,@!q:pointer; {for short-term use}
+@!r:pointer; {temporaly}
+@z
+
+@x [47.1071] l.21485 - pTeX: \tate, \yoko, \dtou
+primitive("hbox",make_box,vtop_code+hmode);@/
+@!@:hbox_}{\.{\\hbox} primitive@>
+@y
+primitive("hbox",make_box,vtop_code+hmode);@/
+@!@:hbox_}{\.{\\hbox} primitive@>
+primitive("tate",chg_dir,dir_tate);@/
+@!@:tate_}{\.{\\tate} primitive@>
+primitive("yoko",chg_dir,dir_yoko);@/
+@!@:yoko_}{\.{\\yoko} primitive@>
+primitive("dtou",chg_dir,dir_dtou);@/
+@!@:dtou_}{\.{\\dtou} primitive@>
+@z
+
+@x [47.1072] l.21506 - pTeX: \tate, \yoko, \dtou
+  othercases print_esc("hbox")
+  endcases;
+leader_ship: if chr_code=a_leaders then print_esc("leaders")
+@y
+  othercases print_esc("hbox")
+  endcases;
+chg_dir:
+  case chr_code of
+    dir_yoko: print_esc("yoko");
+    dir_tate: print_esc("tate");
+    dir_dtou: print_esc("dtou");
+  endcases;
+leader_ship: if chr_code=a_leaders then print_esc("leaders")
+@z
+
+@x [47.1073] l.21523 - pTeX: \tate, \yoko
+any_mode(make_box): begin_box(0);
+@y
+any_mode(make_box): begin_box(0);
+any_mode(chg_dir):
+  begin  if cur_group<>align_group then
+    if head=tail then
+      begin direction:=cur_chr;
+      if mode=vmode then page_dir:=cur_chr;
+      end
+    else begin print_err("Use `"); print_cmd_chr(cur_cmd,cur_chr);
+      print("' at top of list");
+      help2("Direction change command is available only while")
+      ("current list is null."); error;
+      end
+  else begin print_err("You can't use `"); print_cmd_chr(cur_cmd,cur_chr);
+    print("' in an align");
+    help2("To change direction in an align,")
+    ("you shold use \hbox or \vbox with \tate or \yoko."); error;
+    end
+  end;
+@z
+
+@x [47.1075] l.21538 - pTeX: box_end
+var p:pointer; {|ord_noad| for new box in math mode}
+@y
+var p:pointer; {|ord_noad| for new box in math mode}
+q:pointer;
+@z
+
+@x [47.1076] l.21553 - pTeX: box_dir adjust
+begin if cur_box<>null then
+  begin shift_amount(cur_box):=box_context;
+  if abs(mode)=vmode then
+    begin append_to_vlist(cur_box);
+    if adjust_tail<>null then
+      begin if adjust_head<>adjust_tail then
+        begin link(tail):=link(adjust_head); tail:=adjust_tail;
+        end;
+      adjust_tail:=null;
+      end;
+    if mode>0 then build_page;
+    end
+  else  begin if abs(mode)=hmode then space_factor:=1000
+    else  begin p:=new_noad;
+      math_type(nucleus(p)):=sub_box;
+      info(nucleus(p)):=cur_box; cur_box:=p;
+      end;
+    link(tail):=cur_box; tail:=cur_box;
+    end;
+  end;
+end
+@y
+begin if cur_box<>null then
+  begin p:=link(cur_box); link(cur_box):=null;
+  while p<>null do begin
+    q:=p; p:=link(p);
+    if box_dir(q)=abs(direction) then
+      begin list_ptr(q):=cur_box; cur_box:=q; link(cur_box):=null;
+      end
+    else begin
+      delete_glue_ref(space_ptr(q));
+      delete_glue_ref(xspace_ptr(q));
+      free_node(q,box_node_size);
+      end;
+  end;
+  if box_dir(cur_box)<>abs(direction) then
+    cur_box:=new_dir_node(cur_box,abs(direction));
+  shift_amount(cur_box):=box_context;
+  if abs(mode)=vmode then
+    begin append_to_vlist(cur_box);
+    if adjust_tail<>null then
+      begin if adjust_head<>adjust_tail then
+        begin link(tail):=link(adjust_head); tail:=adjust_tail;
+        end;
+      adjust_tail:=null;
+      end;
+    if mode>0 then build_page;
+    end
+  else begin
+    if abs(mode)=hmode then
+      space_factor:=1000
+    else  begin p:=new_noad;
+      math_type(nucleus(p)):=sub_box;
+      info(nucleus(p)):=cur_box; cur_box:=p;
+      end;
+    link(tail):=cur_box; tail:=cur_box;
+  end;
+end;
+end
+@z
+
+@x [47.1078] l.21585 - pTeX: box_dir adjust
+  begin append_glue; subtype(tail):=box_context-(leader_flag-a_leaders);
+  leader_ptr(tail):=cur_box;
+  end
+@y
+  begin append_glue; subtype(tail):=box_context-(leader_flag-a_leaders);
+  if type(cur_box)<=dir_node then
+    begin p:=link(cur_box); link(cur_box):=null;
+    while p<>null do
+      begin q:=p; p:=link(p);
+      if box_dir(q)=abs(direction) then
+        begin list_ptr(q):=cur_box; cur_box:=q; link(cur_box):=null;
+        end
+      else begin
+        delete_glue_ref(space_ptr(q));
+        delete_glue_ref(xspace_ptr(q));
+        free_node(q,box_node_size);
+        end;
+      end;
+    if box_dir(cur_box)<>abs(direction) then
+      cur_box:=new_dir_node(cur_box,abs(direction));
+    end;
+  leader_ptr(tail):=cur_box;
+  end
+@z
+
+@x [47.1079] l.21605  - pTeX: disp_node, adjust direction
+var @!p,@!q:pointer; {run through the current list}
+@!m:quarterword; {the length of a replacement list}
+@!k:halfword; {0 or |vmode| or |hmode|}
+@!n:halfword; {a box number}
+@y
+var @!p,@!q:pointer; {run through the current list}
+@!m:quarterword; {the length of a replacement list}
+@!k:halfword; {0 or |vmode| or |hmode|}
+@!n:halfword; {a box number}
+@!a_dir:eight_bits; {adjust direction}
+@!d:pointer; {last |disp_node|}
+@!disp,@!pdisp:scaled; {displacement}
+@!pp,pnode:pointer;
+@!f:boolean; {will |d| free?}
+@z
+
+@x [47.1080] l.21636 - pTeX: disp_node, check head=tail
+else  begin if not is_char_node(tail) then
+    if (type(tail)=hlist_node)or(type(tail)=vlist_node) then
+      @<Remove the last box, unless it's part of a discretionary@>;
+  end;
+@y
+else  begin f:=false;
+  if (not is_char_node(tail))and(type(tail)=disp_node) then
+    begin d:=tail; tail:=prev_node;
+    end
+  else d:=null;
+  if (not is_char_node(tail))and(head<>tail) then
+    if (type(tail)=hlist_node)or(type(tail)=vlist_node)
+          or(type(tail)=dir_node) then
+      @<Remove the last box, unless it's part of a discretionary@>;
+  if d<>null then
+    if (not is_char_node(tail))and(type(tail)=disp_node) then
+      begin prev_node:=pnode; prev_disp:=pdisp;
+      {|if prev_disp=disp_dimen(d) then free_node(tail,small_node_size)|}
+      if prev_disp<>disp_dimen(d) then disp_dimen(tail):=disp_dimen(d);
+      if f then free_node(d,small_node_size)
+      else begin prev_node:=tail; tail_append(d); end;
+      end
+    else tail_append(d);
+  end;
+@z
+
+@x [47.1081] l.21642 - pTeX: disp_node
+@ @<Remove the last box...@>=
+begin q:=head;
+repeat p:=q;
+if not is_char_node(q) then if type(q)=disc_node then
+  begin for m:=1 to replace_count(q) do p:=link(p);
+  if p=tail then goto done;
+  end;
+q:=link(p);
+until q=tail;
+cur_box:=tail; shift_amount(cur_box):=0;
+tail:=p; link(p):=null;
+done:end
+@y
+@ @<Remove the last box...@>=
+begin q:=head; disp:=0; pdisp:=0;
+repeat p:=q;
+if not is_char_node(q) then
+  if type(q)=disc_node then
+    begin for m:=1 to replace_count(q) do p:=link(p);
+    if p=tail then goto done;
+    end
+  else if type(q)=disp_node then
+    begin pnode:=pp; pdisp:=disp; disp:=disp_dimen(q);
+    end;
+pp:=q; q:=link(p);
+until q=tail;
+cur_box:=tail; shift_amount(cur_box):=0;
+tail:=p; link(p):=null;
+if type(cur_box)=dir_node then
+  begin link(list_ptr(cur_box)):=cur_box;
+  cur_box:=list_ptr(cur_box);
+  list_ptr(link(cur_box)):=null;
+  end
+else
+  if box_dir(cur_box)=dir_default then box_dir(cur_box):=abs(direction);
+done:end
+@z
+
+@x [47.1083] l.21675 - pTeX: adjust_dir
+if k=hmode then
+  if (box_context<box_flag)and(abs(mode)=vmode) then
+    scan_spec(adjusted_hbox_group,true)
+  else scan_spec(hbox_group,true)
+else  begin if k=vmode then scan_spec(vbox_group,true)
+  else  begin scan_spec(vtop_group,true); k:=vmode;
+    end;
+  normal_paragraph;
+  end;
+push_nest; mode:=-k;
+@y
+a_dir:=adjust_dir;
+if k=hmode then
+  if (box_context<box_flag)and(abs(mode)=vmode) then
+    begin a_dir:=abs(direction); scan_spec(adjusted_hbox_group,true);
+    end
+  else scan_spec(hbox_group,true)
+else  begin if k=vmode then scan_spec(vbox_group,true)
+  else  begin scan_spec(vtop_group,true); k:=vmode;
+    end;
+  normal_paragraph;
+  end;
+push_nest; mode:=-k; adjust_dir:=a_dir;
+@z
+
+@x [47.1085] l.21717 - pTeX: end of box, call adjust_hlist
+hbox_group: package(0);
+adjusted_hbox_group: begin adjust_tail:=adjust_head; package(0);
+  end;
+@y
+hbox_group: begin adjust_hlist(head,false); package(0);
+  end;
+adjusted_hbox_group: begin adjust_hlist(head,false);
+  adjust_tail:=adjust_head; package(0);
+  end;
+@z
+
+@x [47.1086] l.21730 - pTeX: set cur_kanji_skip, cur_xkanji_skip
+begin d:=box_max_depth; unsave; save_ptr:=save_ptr-3;
+if mode=-hmode then cur_box:=hpack(link(head),saved(2),saved(1))
+else  begin cur_box:=vpackage(link(head),saved(2),saved(1),d);
+  if c=vtop_code then @<Readjust the height and depth of |cur_box|,
+    for \.{\\vtop}@>;
+  end;
+pop_nest; box_end(saved(0));
+end;
+@y
+begin d:=box_max_depth;
+  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+  if auto_spacing>0 then cur_kanji_skip:=kanji_skip
+  else cur_kanji_skip:=zero_glue;
+  if auto_xspacing>0 then cur_xkanji_skip:=xkanji_skip
+  else cur_xkanji_skip:=zero_glue;
+  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+  unsave; save_ptr:=save_ptr-3;
+  if mode=-hmode then begin
+    cur_box:=hpack(link(head),saved(2),saved(1));
+    box_dir(cur_box):=abs(direction); pop_nest;
+  end else begin
+    cur_box:=vpackage(link(head),saved(2),saved(1),d);
+    box_dir(cur_box):=abs(direction); pop_nest;
+    if c=vtop_code then
+      @<Readjust the height and depth of |cur_box|, for \.{\\vtop}@>;
+  end;
+  box_end(saved(0));
+end;
+@z
+
+@x [47.1090] l.21765 - pTeX: apend vmode case
+vmode+letter,vmode+other_char,vmode+char_num,vmode+char_given,
+   vmode+math_shift,vmode+un_hbox,vmode+vrule,
+   vmode+accent,vmode+discretionary,vmode+hskip,vmode+valign,
+   vmode+ex_space,vmode+no_boundary:@t@>@;@/
+  begin back_input; new_graf(true);
+  end;
+@y
+vmode+letter,vmode+other_char,vmode+char_num,vmode+char_given,
+   vmode+math_shift,vmode+un_hbox,vmode+vrule,
+   vmode+accent,vmode+discretionary,vmode+hskip,vmode+valign,
+   vmode+kanji,vmode+kana,vmode+other_kchar,
+   vmode+ex_space,vmode+no_boundary:@t@>@;@/
+  begin back_input; new_graf(true);
+  end;
+@z
+
+@x [47.1091] l.21782 - pTeX: new_graf, adjust direction
+push_nest; mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
+@y
+push_nest; adjust_dir:=abs(direction);
+mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
+@z
+
+@x [47.1096] l.21842 - pTeX: end_graf, call adjust_hlist
+  begin if head=tail then pop_nest {null paragraphs are ignored}
+  else line_break(widow_penalty);
+@y
+  begin if head=tail then pop_nest {null paragraphs are ignored}
+  else begin adjust_hlist(head,true); line_break(widow_penalty)
+       end;
+@z
+
+@x [47.1099] l.21871 - pTeX: insert and adjust
+new_save_level(insert_group); scan_left_brace; normal_paragraph;
+push_nest; mode:=-vmode; prev_depth:=ignore_depth;
+@y
+new_save_level(insert_group); scan_left_brace; normal_paragraph;
+push_nest; mode:=-vmode; direction:=adjust_dir; prev_depth:=ignore_depth;
+@z
+
+@x [47.1100] l.21876 - pTeX: free box node, ins_dir
+insert_group: begin end_graf; q:=split_top_skip; add_glue_ref(q);
+  d:=split_max_depth; f:=floating_penalty; unsave; decr(save_ptr);
+  {now |saved(0)| is the insertion number, or 255 for |vadjust|}
+  p:=vpack(link(head),natural); pop_nest;
+  if saved(0)<255 then
+    begin tail_append(get_node(ins_node_size));
+    type(tail):=ins_node; subtype(tail):=qi(saved(0));
+    height(tail):=height(p)+depth(p); ins_ptr(tail):=list_ptr(p);
+    split_top_ptr(tail):=q; depth(tail):=d; float_cost(tail):=f;
+    end
+  else  begin tail_append(get_node(small_node_size));
+    type(tail):=adjust_node;@/
+    subtype(tail):=0; {the |subtype| is not used}
+    adjust_ptr(tail):=list_ptr(p); delete_glue_ref(q);
+    end;
+  free_node(p,box_node_size);
+  if nest_ptr=0 then build_page;
+  end;
+@y
+insert_group: begin end_graf; q:=split_top_skip; add_glue_ref(q);
+  d:=split_max_depth; f:=floating_penalty; unsave; decr(save_ptr);
+  {now |saved(0)| is the insertion number, or 255 for |vadjust|}
+  p:=vpack(link(head),natural); box_dir(p):=abs(direction); pop_nest;
+  if saved(0)<255 then
+    begin r:=get_node(ins_node_size);
+    type(r):=ins_node; subtype(r):=qi(saved(0));
+    height(r):=height(p)+depth(p); ins_ptr(r):=list_ptr(p);
+    split_top_ptr(r):=q; depth(r):=d; float_cost(r):=f;
+    ins_dir(r):=box_dir(p);
+    if (not is_char_node(tail))and(type(tail)=disp_node) then
+      prev_append(r)
+    else tail_append(r);
+    end
+  else  begin
+    if box_dir(p)<>adjust_dir then
+      begin print_err("Direction Incompatible.");
+      help1("\vadjust's argument and outer vlist must have same direction.");
+      error; flush_node_list(list_ptr(p));
+      end
+    else  begin
+      r:=get_node(small_node_size); type(r):=adjust_node;@/
+      adjust_ptr(r):=list_ptr(p); delete_glue_ref(q);
+      if (not is_char_node(tail))and(type(tail)=disp_node) then
+        prev_append(r)
+      else tail_append(r);
+      end;
+    end;
+  delete_glue_ref(space_ptr(p));
+  delete_glue_ref(xspace_ptr(p));
+  free_node(p,box_node_size);
+  if nest_ptr=0 then build_page;
+  end;
+@z
+
+@x [47.1101] l.21901 - pTeX: mark_node, prev_append
+mark_ptr(p):=def_ref; link(tail):=p; tail:=p;
+@y
+mark_ptr(p):=def_ref;
+if (not is_char_node(tail))and(type(tail)=disp_node) then
+  prev_append(p)
+else tail_append(p);
+@z
+
+@x [47.1103] l.21911 - pTeX: penalty, prev_append
+procedure append_penalty;
+begin scan_int; tail_append(new_penalty(cur_val));
+if mode=vmode then build_page;
+end;
+@y
+procedure append_penalty;
+begin scan_int;
+  if (not is_char_node(tail))and(type(tail)=disp_node) then
+    prev_append(new_penalty(cur_val))
+  else tail_append(new_penalty(cur_val));
+  if mode=vmode then build_page;
+end;
+@z
+
+@x [47.1105] l.21932 - pTeX: delete_last: disp_node
+var @!p,@!q:pointer; {run through the current list}
+@!m:quarterword; {the length of a replacement list}
+@y
+var @!p,@!q:pointer; {run through the current list}
+@!m:quarterword; {the length of a replacement list}
+@!d:pointer; {last |disp_node|}
+@!disp,@!pdisp:scaled; {displacement}
+@!pp,pnode:pointer;
+@!f:boolean;  {whether remove disp node d }
+@z
+
+@x [47.1105] l.21937 - pTeX: delete_last: disp_node
+else  begin if not is_char_node(tail) then if type(tail)=cur_chr then
+    begin q:=head;
+    repeat p:=q;
+    if not is_char_node(q) then if type(q)=disc_node then
+      begin for m:=1 to replace_count(q) do p:=link(p);
+      if p=tail then return;
+      end;
+    q:=link(p);
+    until q=tail;
+    link(p):=null; flush_node_list(tail); tail:=p;
+    end;
+  end;
+exit:end;
+@y
+else  begin
+  if (not is_char_node(tail))and(type(tail)=disp_node) then
+    begin f:=true; d:=tail; tail:=prev_node; link(tail):=null;
+    end
+  else d:=null;
+  if not is_char_node(tail) then
+  begin if (type(tail)=math_node)and(subtype(tail)=end_M_code) then
+    remove_end_M;
+  if type(tail)=cur_chr then
+    begin q:=head; pp:=null; disp:=0; pdisp:=0;
+    repeat p:=q;
+    if not is_char_node(q) then
+      if type(q)=disc_node then
+        begin for m:=1 to replace_count(q) do p:=link(p);
+        if p=tail then
+          begin if d<>null then tail_append(d);
+          return;
+          end
+        else if link(p)=tail then f:=false;
+        end
+      else  if type(q)=disp_node then
+        begin pnode:=pp; pdisp:=disp; disp:=disp_dimen(q);
+        end;
+    pp:=q; q:=link(p);
+    until q=tail;
+    link(p):=null; flush_node_list(tail); tail:=p;
+    end
+  else { |tail| will not be deleted }
+    begin if d<>null then tail_append(d); return; end;
+    prev_node:=pnode; prev_disp:=pdisp;
+    if d<>null then
+      if (not is_char_node(tail))and(type(tail)=disp_node) then
+        begin if prev_disp=disp_dimen(d) then
+          {|free_node(tail,small_node_size)|}
+          else disp_dimen(tail):=disp_dimen(d);
+        if f then free_node(d,small_node_size) 
+          else begin prev_node:=tail; prev_disp:=disp; tail_append(d) end
+        end
+      else
+        begin prev_node:=tail; prev_disp:=disp; tail_append(d)
+        end;
+  if LR_temp<>null then insert_end_M;
+  end;
+  end;
+exit:end;
+@z
+
+@x [47.1110] l.21997 -pTeX:  free box node, delete kanji_skip
+var p:pointer; {the box}
+@!c:box_code..copy_code; {should we copy?}
+@y
+var p:pointer; {the box}
+@!c:box_code..copy_code; {should we copy?}
+@!disp:scaled; {displacement}
+@z
+
+@x [47.1110] l.22001 - pTeX: free box node, delete kanji_skip
+if (abs(mode)=mmode)or((abs(mode)=vmode)and(type(p)<>vlist_node))or@|
+   ((abs(mode)=hmode)and(type(p)<>hlist_node)) then
+  begin print_err("Incompatible list can't be unboxed");
+@.Incompatible list...@>
+  help3("Sorry, Pandora. (You sneaky devil.)")@/
+  ("I refuse to unbox an \hbox in vertical mode or vice versa.")@/
+  ("And I can't open any boxes in math mode.");@/
+  error; return;
+  end;
+if c=copy_code then link(tail):=copy_node_list(list_ptr(p))
+else  begin link(tail):=list_ptr(p); box(cur_val):=null;
+  free_node(p,box_node_size);
+  end;
+done:
+while link(tail)<>null do tail:=link(tail);
+exit:end;
+@y
+if type(p)=dir_node then p:=list_ptr(p);
+if (abs(mode)=mmode)or((abs(mode)=vmode)and(type(p)<>vlist_node))or@|
+    ((abs(mode)=hmode)and(type(p)<>hlist_node)) then
+  begin print_err("Incompatible list can't be unboxed");
+@.Incompatible list...@>
+  help3("Sorry, Pandora. (You sneaky devil.)")@/
+  ("I refuse to unbox an \hbox in vertical mode or vice versa.")@/
+  ("And I can't open any boxes in math mode.");@/
+  error; return;
+end;
+case box_dir(p) of
+  any_dir:
+    if abs(direction)<>box_dir(p) then begin
+      print_err("Incompatible direction list can't be unboxed");
+      help2("Sorry, Pandora. (You sneaky devil.)")@/
+      ("I refuse to unbox a box in differrent direction.");@/
+      error; return;
+    end;
+endcases;
+disp:=0;
+if c=copy_code then link(tail):=copy_node_list(list_ptr(p))
+else
+  begin if type(p)=dir_node then
+    begin delete_glue_ref(space_ptr(p));
+    delete_glue_ref(xspace_ptr(p));
+    free_node(p,box_node_size);
+    end;
+  flush_node_list(link(p));
+  link(tail):=list_ptr(p); change_box(null);
+  delete_glue_ref(space_ptr(p));
+  delete_glue_ref(xspace_ptr(p));
+  free_node(p,box_node_size);
+  end;
+done:
+while link(tail)<>null do
+  begin p:=tail; tail:=link(tail);
+  if not is_char_node(tail) then
+    case type(tail) of
+    glue_node :
+      if (subtype(tail)=kanji_skip_code+1)
+             or(subtype(tail)=xkanji_skip_code+1) then
+        begin link(p):=link(tail);
+        delete_glue_ref(glue_ptr(tail));
+        free_node(tail,small_node_size); tail:=p;
+        end;
+    penalty_node :
+      if subtype(tail)=widow_pena then
+        begin link(p):=link(tail); free_node(tail,small_node_size);
+        tail:=p;
+        end;
+    disp_node :
+      begin prev_disp:=disp; disp:=disp_dimen(tail); prev_node:=p;
+      end;
+    endcases;
+  end;
+exit:end;
+@z
+
+@x [47.1113] l.22028 - pTeX: italic correction, ita_kern
+procedure append_italic_correction;
+label exit;
+var p:pointer; {|char_node| at the tail of the current list}
+@!f:internal_font_number; {the font in the |char_node|}
+begin if tail<>head then
+  begin if is_char_node(tail) then p:=tail
+  else if type(tail)=ligature_node then p:=lig_char(tail)
+  else return;
+  f:=font(p);
+  tail_append(new_kern(char_italic(f)(char_info(f)(character(p)))));
+  subtype(tail):=explicit;
+  end;
+@y
+procedure append_italic_correction;
+label exit;
+var p:pointer; {|char_node| at the tail of the current list}
+@!f:internal_font_number; {the font in the |char_node|}
+@!d:pointer; {|disp_node|}
+begin if tail<>head then
+  begin
+  if (not is_char_node(tail))and(type(tail)=disp_node) then
+    begin d:=tail; tail:=prev_node;
+    end
+  else d:=null;
+  if (last_jchr<>null)and(link(last_jchr)=tail)and(is_char_node(tail)) then
+    p:=last_jchr
+  else if is_char_node(tail) then p:=tail
+  else if type(tail)=ligature_node then p:=lig_char(tail)
+  else return;
+  f:=font(p);
+  tail_append(new_kern(char_italic(f)(char_info(f)(character(p)))));
+  subtype(tail):=ita_kern;
+  if d<>null then
+    begin prev_node:=tail; tail_append(d);
+    end;
+  end;
+@z
+
+@x [47.1120] l.22119 - pTeX: discretionary with disp_node
+decr(save_ptr); return;
+@y
+decr(save_ptr);
+prev_node:=tail; tail_append(get_node(small_node_size));
+type(tail):=disp_node; disp_dimen(tail):=0; prev_disp:=0;
+return;
+@z
+
+@x [47.1121] l.22127 - pTeX: discretionary with disp_node
+  begin if not is_char_node(p) then if type(p)>rule_node then
+    if type(p)<>kern_node then if type(p)<>ligature_node then
+      begin print_err("Improper discretionary list");
+@y
+  begin if not is_char_node(p) then
+    if (type(p)>rule_node)and(type(p)<>kern_node)and
+         (type(p)<>ligature_node)and(type(p)<>disp_node) then
+      if (type(p)=penalty_node)and(subtype(p)<>normal) then
+        begin link(q):=link(p); free_node(p,small_node_size); p:=q;
+        end
+      else
+        begin print_err("Improper discretionary list");
+@z
+
+@x [47.1123] l.22160 - pTeX: make_accent, Kanji, insert disp_node
+var s,@!t: real; {amount of slant}
+@y
+var s,@!t: real; {amount of slant}
+@!disp:scaled; {displacement}
+@!cx:KANJI_code; {temporary register for KANJI}
+@z
+
+@x [47.1123] l.22165 - pTeX: make_accent, Kanji, insert disp_node
+begin scan_char_num; f:=cur_font; p:=new_character(f,cur_val);
+@y
+begin scan_char_num;
+if (not is_char_ascii(cur_val)) then
+  begin KANJI(cx):=cur_val;
+  if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
+  p:=new_character(f,get_jfm_pos(KANJI(cx),f));
+  if p<>null then
+    begin
+      link(p):=get_avail; info(link(p)):=KANJI(cx);
+    end;
+  end
+else begin f:=cur_font; p:=new_character(f,cur_val);
+  end;
+@z
+
+@x [47.1123] l.22175 - pTeX: make_accent, Kanji, insert disp_node
+  link(tail):=p; tail:=p; space_factor:=1000;
+@y
+  link(tail):=p;
+  if link(p)<>null then tail:=link(p) else tail:=p;
+  @<Append |disp_node| at end of displace area@>;
+  space_factor:=1000;
+@z
+
+@x [47.1124] l.22180 - pTeX: make_accent Kanji, insert disp_node
+q:=null; f:=cur_font;
+if (cur_cmd=letter)or(cur_cmd=other_char)or(cur_cmd=char_given) then
+  q:=new_character(f,cur_chr)
+else if cur_cmd=char_num then
+  begin scan_char_num; q:=new_character(f,cur_val);
+  end
+else back_input
+@y
+q:=null; f:=cur_font; KANJI(cx):=empty;
+if (cur_cmd=letter)or(cur_cmd=other_char) then
+  q:=new_character(f,cur_chr)
+else if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
+  begin  if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
+  cx:=cur_chr;
+  end
+else if cur_cmd=char_given then
+  if is_char_ascii(cur_chr) then q:=new_character(f,cur_chr)
+  else begin
+    if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
+    KANJI(cx):=cur_chr
+    end
+  else if cur_cmd=char_num then
+    begin scan_char_num;
+    if is_char_ascii(cur_val) then q:=new_character(f,cur_val)
+    else  begin
+      if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
+      KANJI(cx):=cur_val
+    end
+  end
+else back_input;
+if direction=dir_tate then
+  begin if font_dir[f]=dir_tate then disp:=0
+  else if font_dir[f]=dir_yoko then disp:=t_baseline_shift-y_baseline_shift
+  else disp:=t_baseline_shift
+  end
+else  begin if font_dir[f]=dir_yoko then disp:=0
+  else if font_dir[f]=dir_tate then disp:=y_baseline_shift-t_baseline_shift
+  else disp:=y_baseline_shift
+  end;
+@<Append |disp_node| at begin of displace area@>;
+if KANJI(cx)<>empty then
+  begin q:=new_character(f,get_jfm_pos(KANJI(cx),f));
+  link(q):=get_avail; info(link(q)):=KANJI(cx); last_jchr:=q;
+  end;
+@z
+
+@x [47.1125] l.22200 - pTeX: make_accent Kanji
+if h<>x then {the accent must be shifted up or down}
+  begin p:=hpack(p,natural); shift_amount(p):=x-h;
+  end;
+@y
+if h<>x then {the accent must be shifted up or down}
+  begin delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+  cur_kanji_skip:=zero_glue; cur_xkanji_skip:=zero_glue;
+  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+  p:=hpack(p,natural); shift_amount(p):=x-h;
+  end;
+@z
+
+@x [47.1125] pTeX: make accent Kanji
+tail:=new_kern(-a-delta); subtype(tail):=acc_kern; link(p):=tail; p:=q;
+@y
+tail:=new_kern(-a-delta); subtype(tail):=acc_kern;
+if h=x then begin
+  if font_dir[font(p)]<>dir_default then link(link(p)):=tail 
+  else link(p):=tail; end
+else link(p):=tail;
+{ bugfix: if |p| is KANJI char, |link(p)|:=|tail| collapses |p| and kern after accent. }
+p:=q;
+@z
+
+@x l.22334 - pTeX
+procedure cs_error;
+begin
+if cur_chr = 10 then
+begin
+  print_err("Extra "); print_esc("endmubyte");
+@.Extra \\endmubyte@>
+  help1("I'm ignoring this, since I wasn't doing a \mubyte.");
+end else begin
+  print_err("Extra "); print_esc("endcsname");
+@.Extra \\endcsname@>
+  help1("I'm ignoring this, since I wasn't doing a \csname.");
+end;
+@y
+procedure cs_error;
+begin print_err("Extra "); print_esc("endcsname");
+@.Extra \\endcsname@>
+help1("I'm ignoring this, since I wasn't doing a \csname.");
+@z
+
+@x [48.1138] l.22385 - pTeX: init math : direction < 0 ... math direction
+if (cur_cmd=math_shift)and(mode>0) then @<Go into display math mode@>
+else  begin back_input; @<Go into ordinary math mode@>;
+  end;
+@y
+if (cur_cmd=math_shift)and(mode>0) then @<Go into display math mode@>
+else  begin back_input; @<Go into ordinary math mode@>;
+  end;
+direction:=-abs(direction);
+@z
+
+@x [48.1145] l.22435 - pTeX: Call adjust_hlist at begin of display
+else  begin line_break(display_widow_penalty);@/
+@y
+else  begin adjust_hlist(head,true); line_break(display_widow_penalty);@/
+@z
+
+@x [48.1147] l.22471 - pTeX: Skip kanji 2nd node, dir_node
+reswitch: if is_char_node(p) then
+  begin f:=font(p); d:=char_width(f)(char_info(f)(character(p)));
+  goto found;
+  end;
+case type(p) of
+hlist_node,vlist_node,rule_node: begin d:=width(p); goto found;
+  end;
+@y
+reswitch: if is_char_node(p) then
+  begin f:=font(p); d:=char_width(f)(orig_char_info(f)(character(p)));
+  if font_dir[f]<>dir_default then p:=link(p);
+  goto found;
+  end;
+case type(p) of
+hlist_node,vlist_node,dir_node,rule_node: begin d:=width(p); goto found;
+  end;
+@z
+
+@x [48.1150] l.22541 - pTeX: scan_math
+mmode+left_brace: begin tail_append(new_noad);
+  back_input; scan_math(nucleus(tail));
+  end;
+@y
+mmode+left_brace: begin tail_append(new_noad);
+  back_input; scan_math(nucleus(tail),kcode_noad(tail));
+  end;
+@z
+
+@x [48.1151] l.22555 - pTeX: scan_math: use Kanji in math_mode
+procedure scan_math(@!p:pointer);
+label restart,reswitch,exit;
+var c:integer; {math character code}
+begin restart:@<Get the next non-blank non-relax...@>;
+reswitch:case cur_cmd of
+letter,other_char,char_given: begin c:=ho(math_code(cur_chr));
+    if c=@'100000 then
+      begin @<Treat |cur_chr| as an active character@>;
+      goto restart;
+      end;
+    end;
+@y
+procedure scan_math(@!p,@!q:pointer);
+label restart,reswitch,exit;
+var c:integer; {math character code}
+cx:KANJI_code; {temporary register for KANJI}
+begin KANJI(cx):=0;
+restart: @<Get the next non-blank non-relax...@>;
+reswitch:case cur_cmd of
+letter,other_char,char_given:
+  if (is_char_ascii(cur_chr) or (cur_chr=256)) then begin
+    c:=ho(math_code(cur_chr));
+    if c=@'100000 then
+      begin @<Treat |cur_chr| as an active character@>;
+      goto restart;
+      end;
+    end
+  else
+    KANJI(cx):=cur_chr;
+kanji,kana,other_kchar: cx:=cur_chr;
+@z
+
+@x [48.1151] l.22576 - pTeX: scan_math: use Kanji in math_mode
+math_type(p):=math_char; character(p):=qi(c mod 256);
+if (c>=var_code)and fam_in_range then fam(p):=cur_fam
+else fam(p):=(c div 256) mod 16;
+@y
+if KANJI(cx)=0 then
+  begin math_type(p):=math_char; character(p):=qi(c mod 256);
+  if (c>=var_code)and(fam_in_range) then fam(p):=cur_fam
+  else fam(p):=(c div 256) mod 16;
+  if font_dir[fam_fnt(fam(p)+cur_size)]<>dir_default then
+    begin print_err("Not one-byte family");
+    help1("IGNORE.");@/
+    error;
+    end
+  end
+else  begin
+  if q=null then
+    begin math_type(p):=sub_mlist; info(p):=new_noad;
+    p:=nucleus(info(p)); q:=kcode_noad_nucleus(p);
+    end;
+  math_type(p):=math_jchar; fam(p):=cur_jfam; character(p):=qi(0);
+  math_kcode(p-1):=KANJI(cx);
+  if font_dir[fam_fnt(fam(p)+cur_size)]=dir_default then
+    begin print_err("Not two-byte family");
+    help1("IGNORE.");@/
+    error;
+    end
+  end;
+@z
+
+@x [48.1154] l.22605 - pTeX: math mode
+mmode+letter,mmode+other_char,mmode+char_given:
+  set_math_char(ho(math_code(cur_chr)));
+mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
+  set_math_char(ho(math_code(cur_chr)));
+  end;
+@y
+mmode+letter,mmode+other_char,mmode+char_given:
+  if is_char_ascii(cur_chr) then
+    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
+    else set_math_char(cur_chr)
+  else set_math_kchar(cur_chr);
+mmode+kanji,mmode+kana,mmode+other_kchar: begin
+    cx:=cur_chr; set_math_kchar(KANJI(cx));
+  end;
+mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
+  if is_char_ascii(cur_chr) then
+    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
+    else set_math_char(cur_chr)
+  else set_math_kchar(cur_chr);
+  end;
+@z
+
+@x [48.1155] l.22635 - pTeX: set_math_char
+  link(tail):=p; tail:=p;
+@y
+  link(tail):=p; tail:=p;
+  if font_dir[fam_fnt(fam(nucleus(p))+cur_size)]<>dir_default then begin
+    print_err("Not one-byte family");
+    help1("IGNORE.");@/
+    error;
+  end
+@z
+
+@x [48.1158] l.22690 - pTeX: scan_math
+  type(tail):=cur_chr; scan_math(nucleus(tail));
+@y
+  type(tail):=cur_chr; scan_math(nucleus(tail),kcode_noad(tail));
+@z
+
+@x [48.1163] l.22750 - pTeX: scan_math
+scan_delimiter(left_delimiter(tail),true); scan_math(nucleus(tail));
+@y
+scan_delimiter(left_delimiter(tail),true);
+scan_math(nucleus(tail),kcode_noad(tail));
+@z
+
+@x [48.1164] l.22770 - pTeX: scan_math
+scan_math(nucleus(tail));
+@y
+scan_math(nucleus(tail),kcode_noad(tail));
+@z
+
+@x [48.1164] l.22790 - pTeX: vcenter : dir
+vcenter_group: begin end_graf; unsave; save_ptr:=save_ptr-2;
+  p:=vpack(link(head),saved(1),saved(0)); pop_nest;
+  tail_append(new_noad); type(tail):=vcenter_noad;
+  math_type(nucleus(tail)):=sub_box; info(nucleus(tail)):=p;
+  end;
+@y
+vcenter_group: begin end_graf; unsave; save_ptr:=save_ptr-2;
+  p:=vpack(link(head),saved(1),saved(0));
+  box_dir(p):=abs(direction); pop_nest;
+  if box_dir(p)<>abs(direction) then p:=new_dir_node(p,abs(direction));
+  tail_append(new_noad); type(tail):=vcenter_noad;
+  math_type(nucleus(tail)):=sub_box; info(nucleus(tail)):=p;
+  end;
+@z
+
+@x [48.1176] l.22864 - pTeX: scan_math
+scan_math(p);
+@y
+scan_math(p,null);
+@z
+
+@x [48.1186] l.23006 - pTeX: copy kanji code
+     if math_type(supscr(p))=empty then
+      begin mem[saved(0)].hh:=mem[nucleus(p)].hh;
+@y
+     if ((math_type(supscr(p))=empty)and(math_kcode(p)=null)) then
+      begin mem[saved(0)].hh:=mem[nucleus(p)].hh;
+@z
+
+@x [48.1194] l.23078 - pTeX: set cur_kanji_skip, cur_xkanji_skip
+var l:boolean; {`\.{\\leqno}' instead of `\.{\\eqno}'}
+@y
+var l:boolean; {`\.{\\leqno}' instead of `\.{\\eqno}'}
+@!disp:scaled; {displacement}
+@z
+
+@x [48.1194] l.23087 - pTeX: set cur_kanji_skip, cur_xkanji_skip
+m:=mode; l:=false; p:=fin_mlist(null); {this pops the nest}
+@y
+delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
+if auto_spacing>0 then cur_kanji_skip:=kanji_skip
+else cur_kanji_skip:=zero_glue;
+if auto_xspacing>0 then cur_xkanji_skip:=xkanji_skip
+else cur_xkanji_skip:=zero_glue;
+add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
+m:=mode; l:=false; p:=fin_mlist(null); {this pops the nest}
+@z
+
+@x [48.1196] l.23134 - pTeX: insert disp_node
+begin tail_append(new_math(math_surround,before));
+cur_mlist:=p; cur_style:=text_style; mlist_penalties:=(mode>0); mlist_to_hlist;
+link(tail):=link(temp_head);
+while link(tail)<>null do tail:=link(tail);
+tail_append(new_math(math_surround,after));
+space_factor:=1000; unsave;
+end
+@y
+begin if direction=dir_tate then disp:=t_baseline_shift
+      else disp:=y_baseline_shift;
+@<Append |disp_node| at begin of displace area@>;
+tail_append(new_math(math_surround,before));
+cur_mlist:=p; cur_style:=text_style; mlist_penalties:=(mode>0); mlist_to_hlist;
+link(tail):=link(temp_head);
+while link(tail)<>null do tail:=link(tail);
+tail_append(new_math(math_surround,after));
+@<Append |disp_node| at end of displace area@>;
+space_factor:=1000; unsave;
+end
+@z
+
+@x [48.1200] l.23203 - pTeX: adjust direction
+push_nest; mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
+@y
+push_nest; adjust_dir:=abs(direction);
+mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
+@z
+
+@x [48.1201] l.23217 - pTeX: free box node
+  begin free_node(b,box_node_size);
+@y
+  begin delete_glue_ref(space_ptr(b)); delete_glue_ref(xspace_ptr(b));
+  free_node(b,box_node_size);
+@z
+
+@x [48.1201] l.23222 - pTeX: free box node
+    begin free_node(b,box_node_size);
+@y
+    begin delete_glue_ref(space_ptr(b)); delete_glue_ref(xspace_ptr(b));
+    free_node(b,box_node_size);
+@z
+
+@x [49.1210] l.23361 - pTeX: set_auto_spacing
+any_mode(toks_register),
+any_mode(assign_toks),
+any_mode(assign_int),
+@y
+any_mode(assign_kinsoku),
+any_mode(assign_inhibit_xsp_code),
+any_mode(set_auto_spacing),
+any_mode(set_kansuji_char),
+any_mode(toks_register),
+any_mode(assign_toks),
+any_mode(assign_int),
+any_mode(def_jfont),
+any_mode(def_tfont),
+@z
+
+@x [49.1211] l.23397 - pTeX: prefixed_command
+procedure prefixed_command;
+label done,exit;
+var a:small_number; {accumulated prefix codes so far}
+@y
+procedure prefixed_command;
+label done,exit;
+var a:small_number; {accumulated prefix codes so far}
+@!m:integer; {ditto}
+@z
+
+@x [49.1217] l.23487 - pTeX: select cur font
+set_font: define(cur_font_loc,data,cur_chr);
+@y
+set_font: begin
+  if font_dir[cur_chr]=dir_yoko then
+    define(cur_jfont_loc,data,cur_chr)
+  else if font_dir[cur_chr]=dir_tate then
+    define(cur_tfont_loc,data,cur_chr)
+  else
+    define(cur_font_loc,data,cur_chr)
+end;
+@z
+
+@x l.23504 - pTeX
+primitive("futurelet",let,normal+1);@/
+@!@:future_let_}{\.{\\futurelet} primitive@>
+
+@ @<Cases of |print_cmd_chr|...@>=
+let: if chr_code<>normal then print_esc("futurelet")@+else print_esc("let");
+
+@ @<Assignments@>=
+let:  begin n:=cur_chr;
+@y
+primitive("futurelet",let,normal+1);@/
+@!@:future_let_}{\.{\\futurelet} primitive@>
+
+@ @<Cases of |print_cmd_chr|...@>=
+let: if chr_code<>normal then print_esc("futurelet")@+else print_esc("let");
+
+@ @<Assignments@>=
+let:  begin n:=cur_chr;
+@z
+
+@x [49.1228] l.23785 - pTeX: assign jfam
+assign_int: begin p:=cur_chr; scan_optional_equals; scan_int;
+  word_define(p,cur_val);
+  end;
+@y
+assign_int: begin p:=cur_chr; scan_optional_equals; scan_int;
+  if p=int_base+cur_fam_code then
+    begin if font_dir[fam_fnt(cur_val)]<>dir_default then
+      word_define(int_base+cur_jfam_code,cur_val)
+    else word_define(p,cur_val);
+    end
+  else word_define(p,cur_val);
+  end;
+@z
+
+@x [49.1230] l.23812 - pTeX: xspcode, kcatcode
+@<Put each...@>=
+primitive("catcode",def_code,cat_code_base);
+@!@:cat_code_}{\.{\\catcode} primitive@>
+@y
+@<Put each...@>=
+primitive("catcode",def_code,cat_code_base);
+@!@:cat_code_}{\.{\\catcode} primitive@>
+primitive("kcatcode",def_code,kcat_code_base);
+@!@:cat_code_}{\.{\\kcatcode} primitive@>
+primitive("xspcode",def_code,auto_xsp_code_base);
+@!@:auto_xsp_code_}{\.{\\xspcode} primitive@>
+@z
+
+@x [49.1231] l.23842 - pTeX: xspcode, kcatcode
+def_code: if chr_code=cat_code_base then print_esc("catcode")
+  else if chr_code=math_code_base then print_esc("mathcode")
+@y
+def_code: if chr_code=cat_code_base then print_esc("catcode")
+  else if chr_code=kcat_code_base then print_esc("kcatcode")
+  else if chr_code=auto_xsp_code_base then print_esc("xspcode")
+  else if chr_code=math_code_base then print_esc("mathcode")
+@z
+
+@x [49.1232] l.23857 - pTeX: kcatcode
+def_code: begin @<Let |n| be the largest legal code value, based on |cur_chr|@>;
+  p:=cur_chr; scan_char_num; p:=p+cur_val; scan_optional_equals;
+  scan_int;
+  if ((cur_val<0)and(p<del_code_base))or(cur_val>n) then
+    begin print_err("Invalid code ("); print_int(cur_val);
+@.Invalid code@>
+    if p<del_code_base then print("), should be in the range 0..")
+    else print("), should be at most ");
+    print_int(n);
+    help1("I'm going to use 0 instead of that illegal code value.");@/
+    error; cur_val:=0;
+    end;
+  if p<math_code_base then define(p,data,cur_val)
+  else if p<del_code_base then define(p,data,hi(cur_val))
+  else word_define(p,cur_val);
+  end;
+@y
+def_code: begin
+  @<Let |m| be the minimal legal code value, based on |cur_chr|@>;
+  @<Let |n| be the largest legal code value, based on |cur_chr|@>;
+  p:=cur_chr; scan_char_num;
+  if p=kcat_code_base then p:=p+kcatcodekey(cur_val) else p:=p+cur_val;
+  scan_optional_equals; scan_int;
+  if ((cur_val<m)and(p<del_code_base))or(cur_val>n) then
+  begin print_err("Invalid code ("); print_int(cur_val);
+@.Invalid code@>
+    if p<del_code_base then
+      begin print("), should be in the range "); print_int(m); print("..");
+      end
+    else print("), should be at most ");
+    print_int(n);
+    if m=0 then
+      begin help1("I'm going to use 0 instead of that illegal code value.");@/
+      error;
+      end
+    else
+      begin help1("I'm going to use 16 instead of that illegal code value.");@/
+      error;
+      end;
+    cur_val:=m;
+  end;
+  if p<math_code_base then define(p,data,cur_val)
+  else if p<del_code_base then define(p,data,hi(cur_val))
+  else word_define(p,cur_val);
+  end;
+@z
+
+@x [49.1233] l.23882 - pTeX: kcatcode
+@ @<Let |n| be the largest...@>=
+if cur_chr=cat_code_base then n:=max_char_code
+@y
+@ @<Let |m| be the minimal...@>=
+if cur_chr=kcat_code_base then m:=kanji else m:=0
+
+@ @<Let |n| be the largest...@>=
+if cur_chr=cat_code_base then n:=invalid_char {1byte |max_char_code|}
+else if cur_chr=kcat_code_base then n:=max_char_code
+@z
+
+@x [49.1247] l.24083 - pTeX: alter_box_dimen : box_dir
+procedure alter_box_dimen;
+var c:small_number; {|width_offset| or |height_offset| or |depth_offset|}
+@!b:pointer; {box register}
+begin c:=cur_chr; scan_register_num; fetch_box(b); scan_optional_equals;
+scan_normal_dimen;
+if b<>null then mem[b+c].sc:=cur_val;
+end;
+@y
+procedure alter_box_dimen;
+var c:small_number; {|width_offset| or |height_offset| or |depth_offset|}
+@!b:pointer; {box register}
+@!p,q:pointer; {temporary registers}
+begin c:=cur_chr; scan_register_num; fetch_box(b); scan_optional_equals;
+scan_normal_dimen;
+if b<>null then
+  begin q:=b; p:=link(q);
+  while p<>null do
+    begin if abs(direction)=box_dir(p) then q:=p;
+    p:=link(p);
+    end;
+  if box_dir(q)<>abs(direction) then
+    begin q:=new_dir_node(q,abs(direction)); list_ptr(q):=null;
+    link(q):=link(b); link(b):=q;
+    end;
+    mem[q+c].sc:=cur_val;
+  end;
+end;
+@z
+
+@x [49.1256] l.24163 - pTeX: def_tfont
+def_font: new_font(a);
+@y
+def_tfont,def_jfont,def_font: new_font(a);
+@z
+
+@x [49.1292] l.24451 - pTeX: shift_case
+@<Change the case of the token in |p|, if a change is appropriate@>=
+t:=info(p);
+if t<cs_token_flag+single_base then
+  begin c:=t mod 256;
+  if equiv(b+c)<>0 then info(p):=t-c+equiv(b+c);
+  end
+@y
+@<Change the case of the token in |p|, if a change is appropriate@>=
+t:=info(p);
+if (t<cs_token_flag+single_base)and(not check_kanji(t)) then
+  begin c:=t mod 256;
+  if equiv(b+c)<>0 then info(p):=t-c+equiv(b+c);
+  end
+@z
+
+@x [49.1291] l.24467 - pTeX: show_mode
+@d show_lists=3 { \.{\\showlists} }
+@y
+@d show_lists=3 { \.{\\showlists} }
+@d show_mode=4 { \.{\\showmode} }
+@z
+
+@x [49.1291] l.24476 - pTeX: show_mode
+primitive("showlists",xray,show_lists);
+@!@:show_lists_}{\.{\\showlists} primitive@>
+@y
+primitive("showlists",xray,show_lists);
+@!@:show_lists_}{\.{\\showlists} primitive@>
+primitive("showmode",xray,show_mode);
+@!@:show_mode_}{\.{\\showmode} primitive@>
+@z
+
+@x [49.1292] l.24483 - pTeX: show_mode
+  othercases print_esc("show")
+@y
+  show_mode:print_esc("showmode");
+  othercases print_esc("show")
+@z
+
+@x [49.1293] l.24495 - pTeX: show_mode
+show_code: @<Show the current meaning of a token, then |goto common_ending|@>;
+@y
+show_code: @<Show the current meaning of a token, then |goto common_ending|@>;
+show_mode: @<Show the current japanese processing mode@>;
+@z
+
+@x l.24982
+font_info:=xmalloc_array(fmemory_word, font_mem_size);
+@y
+font_info:=xmalloc_array(memory_word, font_mem_size);
+@z
+
+@x [50.1320] l.24988 - pTeX:
+@ @<Dump the array info for internal font number |k|@>=
+begin
+dump_things(font_check[null_font], font_ptr+1-null_font);
+@y
+@ @<Dump the array info for internal font number |k|@>=
+begin
+dump_things(font_dir[null_font], font_ptr+1-null_font);
+dump_things(font_num_ext[null_font], font_ptr+1-null_font);
+dump_things(font_check[null_font], font_ptr+1-null_font);
+@z
+
+@x [50.1321] l.25000 - pTeX:
+dump_things(char_base[null_font], font_ptr+1-null_font);
+@y
+dump_things(ctype_base[null_font], font_ptr+1-null_font);
+dump_things(char_base[null_font], font_ptr+1-null_font);
+@z
+
+@x [50.1322] l.25024 - pTeX:
+@<Undump the array info for internal font number |k|@>=
+begin {Allocate the font arrays}
+@y
+@<Undump the array info for internal font number |k|@>=
+begin {Allocate the font arrays}
+font_dir:=xmalloc_array(eight_bits, font_max);
+font_num_ext:=xmalloc_array(integer, font_max);
+@z
+
+@x [50.1322] l.25040 - pTeX:
+char_base:=xmalloc_array(integer, font_max);
+@y
+ctype_base:=xmalloc_array(integer, font_max);
+char_base:=xmalloc_array(integer, font_max);
+@z
+
+@x [50.1322] l.25050 - pTeX:
+undump_things(font_check[null_font], font_ptr+1-null_font);
+@y
+undump_things(font_dir[null_font], font_ptr+1-null_font);
+undump_things(font_num_ext[null_font], font_ptr+1-null_font);
+undump_things(font_check[null_font], font_ptr+1-null_font);
+@z
+
+@x [50.1322] l.25064 - pTeX:
+undump_things(char_base[null_font], font_ptr+1-null_font);
+@y
+undump_things(ctype_base[null_font], font_ptr+1-null_font);
+undump_things(char_base[null_font], font_ptr+1-null_font);
+@z
+
+@x l.25363 - pTeX
+  font_info:=xmalloc_array (fmemory_word, font_mem_size);
+@y
+  font_info:=xmalloc_array (memory_word, font_mem_size);
+@z
+
+@x [51.1337] l.25563 - pTeX:
+  font_check:=xmalloc_array(four_quarters, font_max);
+@y
+  font_dir:=xmalloc_array(eight_bits, font_max);
+  font_num_ext:=xmalloc_array(integer, font_max);
+  font_check:=xmalloc_array(four_quarters, font_max);
+@z
+
+@x [51.1337] l.25577 - pTeX:
+  char_base:=xmalloc_array(integer, font_max);
+@y
+  ctype_base:=xmalloc_array(integer, font_max);
+  char_base:=xmalloc_array(integer, font_max);
+@z
+
+@x [51.1337] l.25587 - pTeX:
+  font_ptr:=null_font; fmem_ptr:=7;
+@y
+  font_ptr:=null_font; fmem_ptr:=7;
+  font_dir[null_font]:=dir_default;
+  font_num_ext[null_font]:=0;
+@z
+
+@x [51.1337] l.25594 - pTeX:
+  char_base[null_font]:=0; width_base[null_font]:=0;
+@y
+  ctype_base[null_font]:=0; char_base[null_font]:=0; width_base[null_font]:=0;
+@z
+
+@x [53.1376] l.26309 - pTeX:
+@<Glob...@> =
+@!debug_format_file: boolean;
+@y
+@<Glob...@> =
+@!debug_format_file: boolean;
+
+@ @<Set init...@>=
+@!debug debug_format_file:=true; @+gubed;
+@z
+
+@x l.26984 - pTeX
+@* \[54] System-dependent changes.
+@y
+@* \[55/p\TeX] System-dependent changes for p\TeX.
+This section described extended variables, procesures, functions and so on
+for pTeX.
+
+@<Declare procedures that scan font-related stuff@>=
+function get_jfm_pos(@!kcode:KANJI_code;@!f:internal_font_number):eight_bits;
+var @!jc:KANJI_code; {temporary register for KANJI}
+@!sp,@!mp,@!ep:pointer;
+begin@/
+jc:=toDVI(kcode);
+sp:=1; { start position }
+ep:=font_num_ext[f]-1; { end position }
+if (ep>=1)and(kchar_code(f)(sp)<=jc)and(jc<=kchar_code(f)(ep)) then
+  begin while (sp <= ep) do
+    begin mp:=sp+((ep-sp) div 2);
+    if jc<kchar_code(f)(mp) then ep:=mp-1
+    else if jc>kchar_code(f)(mp) then sp:=mp+1
+    else
+      begin get_jfm_pos:=kchar_type(f)(mp); return;
+      end;
+    end;
+  end;
+get_jfm_pos:=kchar_type(f)(0);
+end;
+
+@ Following codes are used to calcutation a KANJI width and height.
+
+@<Local variables for dimension calculations@>=
+@!t: eight_bits;
+
+@ @<The KANJI width for |cur_jfont|@>=
+if direction=dir_tate then
+  v:=char_width(cur_tfont)(orig_char_info(cur_tfont)(qi(0)))
+else
+  v:=char_width(cur_jfont)(orig_char_info(cur_jfont)(qi(0)))
+
+@ @<The KANJI height for |cur_jfont|@>=
+if direction=dir_tate then begin
+  t:=height_depth(orig_char_info(cur_tfont)(qi(0)));
+  v:=char_height(cur_tfont)(t)+char_depth(cur_tfont)(t);
+end else begin
+  t:=height_depth(orig_char_info(cur_jfont)(qi(0)));
+  v:=char_height(cur_jfont)(t)+char_depth(cur_jfont)(t);
+end
+
+@ set a kansuji character.
+
+@ @<Put each...@>=
+primitive("kansujichar",set_kansuji_char,0);
+@!@:kansujichar_}{\.{\\kansujichar} primitive@>
+
+@ @<Cases of |print_cmd_chr|...@>=
+set_kansuji_char: print_esc("kansujichar");
+
+@ @<Assignments@>=
+set_kansuji_char:
+begin p:=cur_chr; scan_int; n:=cur_val; scan_optional_equals; scan_int;
+if not check_kanji(cur_val) then
+  begin print_err("Invalid KANSUJI char (");
+  print_hex(cur_val); print_char(")");
+@.Invalid KANSUJI char@>
+  help1("I'm skip this control sequences.");@/
+  error; return;
+  end
+else if (n<0)or(n>9) then
+  begin print_err("Invalid KANSUJI number ("); print_int(n); print_char(")");
+@.Invalid KANSUJI number@>
+  help1("I'm skip this control sequences.");@/
+  error; return;
+  end
+else
+  define(kansuji_base+n,n,tokanji(toDVI(cur_val)));
+end;
+
+@ |print_kansuji| procedure converts a number to KANJI number.
+
+@ @<Declare procedures needed in |scan_something|@>=
+procedure print_kansuji(@!n:integer);
+var @!k:0..23; {index to current digit; we assume that $|n|<10^{23}$}
+@!cx: KANJI_code; {temporary register for KANJI}
+begin k:=0;
+  if n<0 then return; {nonpositive input produces no output}
+  repeat dig[k]:=n mod 10; n:=n div 10; incr(k);
+  until n=0;
+  begin while k>0 do
+    begin decr(k);
+	cx:=kansuji_char(dig[k]);
+	print_kanji(fromDVI(cx));
+    end;
+  end;
+end;
+
+@ pTeX inserts a glue specified by \.{\\kanjiskip} between 2byte-characters,
+automatically, if \.{\\autospacing}.  This glue is suppressed by
+\.{\\noautospacing}.
+\.{\\xkanjiskip}, \.{\\noautoxspacing}, \.{\\autoxspacing}, \.{\\xspcode} is
+used to control between 2byte and 1byte characters.
+
+@d reset_auto_spacing_code=0
+@d set_auto_spacing_code=1
+@d reset_auto_xspacing_code=2
+@d set_auto_xspacing_code=3
+
+@<Put each...@>=
+primitive("autospacing",set_auto_spacing,set_auto_spacing_code);
+@!@:auto_spacing_}{\.{\\autospacing} primitive@>
+primitive("noautospacing",set_auto_spacing,reset_auto_spacing_code);
+@!@:no_auto_spacing_}{\.{\\noautospacing} primitive@>
+primitive("autoxspacing",set_auto_spacing,set_auto_xspacing_code);
+@!@:auto_xspacing_}{\.{\\autoxspacing} primitive@>
+primitive("noautoxspacing",set_auto_spacing,reset_auto_xspacing_code);
+@!@:no_auto_xspacing_}{\.{\\noautoxspacing} primitive@>
+
+@ @<Cases of |print_cmd_chr|...@>=
+set_auto_spacing:begin
+  if (chr_code mod 2)=0 then print_esc("noauto") else print_esc("auto");
+  if chr_code<2 then print("spacing") else print("xspacing");
+end;
+
+@ @<Assignments@>=
+set_auto_spacing:begin
+  if cur_chr<2 then p:=auto_spacing_code
+  else begin p:=auto_xspacing_code; cur_chr:=(cur_chr mod 2); end;
+  define(p,data,cur_chr);
+end;
+
+@ Following codes are used in section 49.
+
+@<Show the current japanese processing mode@>=
+begin print_nl("> ");
+if auto_spacing>0 then print("auto spacing mode; ")
+  else print("no auto spacing mode; ");
+print_nl("> ");
+if auto_xspacing>0 then print("auto xspacing mode")
+  else print("no auto xspacing mode");
+goto common_ending;
+end
+
+@ The \.{\\inhibitglue} primitive control to insert a glue specified
+JFM (Japanese Font Metic) file.  The \.{\\inhibitxspcode} is used to control
+inserting a space between 2byte-char and 1byte-char.
+
+@d inhibit_both=0     {disable to insert space before 2byte-char and after it}
+@d inhibit_previous=1 {disable to insert space before 2byte-char}
+@d inhibit_after=2    {disable to insert space after 2byte-char}
+@d no_entry=1000
+@d new_pos=0
+@d cur_pos=1
+
+@<Global...@>=
+  inhibit_glue_flag:boolean;
+
+@ @<Set init...@>=
+  inhibit_glue_flag:=false;
+
+@ @<Cases of |main_control| that don't...@>=
+  any_mode(inhibit_glue): inhibit_glue_flag:=true;
+
+@ @<Put each...@>=
+primitive("inhibitglue",inhibit_glue,0);
+@!@:inhibit_glue_}{\.{\\inhibitglue} primitive@>
+primitive("inhibitxspcode",assign_inhibit_xsp_code,inhibit_xsp_code_base);
+@!@:inhibit_xsp_code_}{\.{\\inhibitxspcode} primitive@>
+
+@ @<Cases of |print_cmd_chr|...@>=
+inhibit_glue: print_esc("inhibitglue");
+assign_inhibit_xsp_code: print_esc("inhibitxspcode");
+
+@ @<Declare procedures needed in |scan_something|@>=
+function get_inhibit_pos(c:KANJI_code; n:small_number):pointer;
+label done, done1;
+var p,s:pointer;
+begin s:=calc_pos(c); p:=s;
+if n=new_pos then
+  begin repeat
+  if (inhibit_xsp_code(p)=0)or(inhibit_xsp_code(p)=c) then goto done;
+  incr(p); if p>255 then p:=0;
+  until s=p; p:=no_entry;
+  end
+else
+  begin repeat
+  if inhibit_xsp_code(p)=0 then goto done1;
+  if inhibit_xsp_code(p)=c then goto done;
+  incr(p); if p>255 then p:=0;
+  until s=p;
+done1: p:=no_entry;
+  end;
+done: get_inhibit_pos:=p;
+end;
+
+@ @<Assignments@>=
+assign_inhibit_xsp_code:
+begin p:=cur_chr; scan_int; n:=cur_val; scan_optional_equals; scan_int;
+if check_kanji(n) then
+  begin j:=get_inhibit_pos(tokanji(n),new_pos);
+  if j=no_entry then
+    begin print_err("Inhibit table is full!!");
+    help1("I'm skip this control sequences.");@/
+    error; return;
+  end;
+  define(inhibit_xsp_code_base+j,cur_val,n);
+  end
+else
+  begin print_err("Invalid KANJI code ("); print_hex(n); print_char(")");
+@.Invalid KANJI code@>
+  help1("I'm skip this control sequences.");@/
+  error; return;
+  end;
+end;
+
+@ @<Fetch inhibit type from some table@>=
+begin scan_int; q:=get_inhibit_pos(tokanji(cur_val),cur_pos);
+cur_val_level:=int_val; cur_val:=3;
+if q<>no_entry then cur_val:=inhibit_xsp_type(q);
+end
+
+@ The \.{\\prebreakpenalty} is used to specified amount of penalties inserted
+before the 2byte-char which is first argument of this primitive.
+The \.{\\postbreakpenalty} is inserted after the 2byte-char.
+
+@d pre_break_penalty_code=1
+@d post_break_penalty_code=2
+
+@<Put each...@>=
+primitive("prebreakpenalty",assign_kinsoku,pre_break_penalty_code);
+@!@:pre_break_penalty_}{\.{\\prebreakpenalty} primitive@>
+primitive("postbreakpenalty",assign_kinsoku,post_break_penalty_code);
+@!@:post_break_penalty_}{\.{\\postbreakpenalty} primitive@>
+
+@ @<Cases of |print_cmd_chr|...@>=
+assign_kinsoku: case chr_code of
+  pre_break_penalty_code: print_esc("prebreakpenalty");
+  post_break_penalty_code: print_esc("postbreakpenalty");
+  endcases;
+
+@ @<Declare procedures needed in |scan_something|@>=
+function get_kinsoku_pos(c:KANJI_code; n:small_number):pointer;
+label done, done1;
+var p,s:pointer;
+begin s:=calc_pos(c); p:=s;
+@!debug
+print_ln; print("c:="); print_int(c); print(", p:="); print_int(s);
+if p+kinsoku_base<0 then
+  begin print("p is negative value"); print_ln;
+  end;
+gubed
+if n=new_pos then
+  begin repeat
+  if (kinsoku_type(p)=0)or(kinsoku_code(p)=c) then goto done;
+  incr(p); if p>255 then p:=0;
+  until s=p;
+  p:=no_entry;
+  end
+else
+  begin repeat
+  if kinsoku_type(p)=0 then goto done1;
+  if kinsoku_code(p)=c then goto done;
+  incr(p); if p>255 then p:=0;
+  until s=p;
+done1: p:=no_entry;
+  end;
+done: get_kinsoku_pos:=p;
+end;
+
+@ @<Assignments@>=
+assign_kinsoku:
+begin p:=cur_chr; scan_int; n:=cur_val; scan_optional_equals; scan_int;
+if (is_char_ascii(n) or check_kanji(n)) then
+  begin j:=get_kinsoku_pos(tokanji(n),new_pos);
+  if j=no_entry then
+    begin print_err("KINSOKU table is full!!");
+    help1("I'm skip this control sequences.");@/
+    error; return;
+    end;
+  if (p=pre_break_penalty_code)or(p=post_break_penalty_code) then
+    begin define(kinsoku_base+j,p,tokanji(n));
+    word_define(kinsoku_penalty_base+j,cur_val);
+    end
+  else confusion("kinsoku");
+@:this can't happen kinsoku}{\quad kinsoku@>
+  end
+else
+  begin print_err("Invalid KANJI code for ");
+  if (p=pre_break_penalty_code) then print("pre")
+  else if (p=post_break_penalty_code) then print("post")
+  else print_char("?");
+  print("breakpenalty ("); print_hex(n); print_char(")");
+@.Invalid KANJI code@>
+  help1("I'm skip this control sequences.");@/
+  error; return;
+  end;
+end;
+
+@ @<Fetch breaking penalty from some table@>=
+begin scan_int; q:=get_kinsoku_pos(tokanji(cur_val),cur_pos);
+cur_val_level:=int_val; cur_val:=0;
+if (q<>no_entry)and(m=kinsoku_type(q)) then
+    scanned_result(kinsoku_penalty(q))(int_val);
+end
+
+@ Following codes are used in |main_control|.
+
+@<Insert kinsoku penalty@>=
+begin kp:=get_kinsoku_pos(cx,cur_pos);
+if (kp<>no_entry) then
+  begin if (kinsoku_type(kp)=pre_break_penalty_code) then
+    begin if (not is_char_node(cur_q))and(type(cur_q)=penalty_node) then
+      penalty(cur_q):=penalty(cur_q)+kinsoku_penalty(kp)
+    else
+      begin main_p:=link(cur_q); link(cur_q):=new_penalty(kinsoku_penalty(kp));
+      subtype(link(cur_q)):=kinsoku_pena; link(link(cur_q)):=main_p;
+      end;
+    end
+  else if (kinsoku_type(kp)=post_break_penalty_code) then
+    begin tail_append(new_penalty(kinsoku_penalty(kp)));
+    subtype(tail):=kinsoku_pena;
+    end;
+  end;
+end;
+
+@ @<Insert |pre_break_penalty| of |cur_chr|@>=
+begin kp:=get_kinsoku_pos(cur_chr,cur_pos);
+if (kp<>no_entry) then
+  begin if (kinsoku_type(kp)=pre_break_penalty_code) then
+    if (not is_char_node(tail))and(type(tail)=penalty_node) then
+      penalty(tail):=penalty(tail)+kinsoku_penalty(kp)
+    else
+      begin tail_append(new_penalty(kinsoku_penalty(kp)));
+      subtype(tail):=kinsoku_pena;
+      end;
+  end;
+end;
+
+@ @<Insert |post_break_penalty|@>=
+begin kp:=get_kinsoku_pos(cx,cur_pos);
+if (kp<>no_entry) then
+  begin if (kinsoku_type(kp)=post_break_penalty_code) then
+    begin tail_append(new_penalty(kinsoku_penalty(kp)));
+    subtype(tail):=kinsoku_pena;
+    end;
+  end;
+end;
+
+@ This is a part of section 32.
+
+The procedure |synch_dir| is used in |hlist_out| and |vlist_out|.
+
+@d dvi_yoko=0
+@d dvi_tate=1
+@d dvi_dtou=3
+
+@<Glob...@>=
+@!dvi_dir:integer; {a \.{DVI} reader program thinks we direct to}
+@!cur_dir_hv:integer; {\TeX\ thinks we direct to}
+@!page_dir:eight_bits;
+
+@ @<Set init...@>=
+page_dir:=dir_yoko;
+
+@ @<Declare procedures needed in |hlist_out|, |vlist_out|@>=
+procedure synch_dir;
+var tmp:scaled; {temporary resister}
+begin
+  case cur_dir_hv of
+  dir_yoko:
+    if dvi_dir<>cur_dir_hv then begin
+      synch_h; synch_v; dvi_out(dirchg); dvi_out(dvi_yoko);
+      dir_used:=true;
+      case dvi_dir of
+        dir_tate: begin tmp:=cur_h; cur_h:=-cur_v; cur_v:=tmp end;
+        dir_dtou: begin tmp:=cur_h; cur_h:=cur_v; cur_v:=-tmp end;
+      endcases;
+      dvi_h:=cur_h; dvi_v:=cur_v; dvi_dir:=cur_dir_hv;
+    end;
+  dir_tate:
+    if dvi_dir<>cur_dir_hv then begin
+      synch_h; synch_v; dvi_out(dirchg); dvi_out(dvi_tate);
+      dir_used:=true;
+      case dvi_dir of
+        dir_yoko: begin tmp:=cur_h; cur_h:=cur_v; cur_v:=-tmp end;
+        dir_dtou: begin cur_v:=-cur_v; cur_h:=-cur_h; end;
+      endcases;
+      dvi_h:=cur_h; dvi_v:=cur_v; dvi_dir:=cur_dir_hv;
+    end;
+  dir_dtou:
+    if dvi_dir<>cur_dir_hv then begin
+      synch_h; synch_v; dvi_out(dirchg); dvi_out(dvi_dtou);
+      dir_used:=true;
+      case dvi_dir of
+        dir_yoko: begin tmp:=cur_h; cur_h:=-cur_v; cur_v:=tmp end;
+        dir_tate: begin cur_v:=-cur_v; cur_h:=-cur_h; end;
+      endcases;
+      dvi_h:=cur_h; dvi_v:=cur_v; dvi_dir:=cur_dir_hv;
+    end;
+  othercases
+    confusion("synch_dir");
+  endcases
+end;
+
+@ This function is called from |adjust_hlist| to used to check, whether
+a list which pointed |box_p| contain a printing character.
+If the list contain such a character, then return `true', otherwise `false'.
+If the first matter is a character, |first_char| is stored it.
+|last_char| is stored a last character.  If no printing characters exist
+in the list, |first_char| and |last_char| is null.
+@^recursion@>
+
+@<Glob...@>=
+@!first_char:pointer; {first printable character}
+@!last_char:pointer; {last printable character}
+@!find_first_char:boolean; {find for a first printable character?}
+
+@ @<Declare procedures needed in |hlist_out|, |vlist_out|@>=
+function check_box(box_p:pointer):boolean;
+label done;
+var @!p:pointer; {run through the current box}
+@!flag:boolean; {found any printable character?}
+begin flag:=false; p:=box_p;
+while p<>null do
+  begin if is_char_node(p) then
+    repeat
+    if find_first_char then
+      begin first_char:=p; find_first_char:=false
+      end;
+    last_char:=p; flag:=true;
+    if font_dir[font(p)]<>dir_default then p:=link(p);
+    p:=link(p);
+    if p=null then goto done;
+    until not is_char_node(p);
+  case type(p) of
+  hlist_node:
+    begin flag:=true;
+      if shift_amount(p)=0 then
+        begin if check_box(list_ptr(p)) then flag:=true;
+        end
+      else if find_first_char then find_first_char:=false
+        else last_char:=null;
+    end;
+  ligature_node: if check_box(lig_ptr(p)) then flag:=true;
+  ins_node,disp_node,mark_node,adjust_node,whatsit_node,penalty_node:
+    do_nothing;
+  othercases begin flag:=true;
+    if find_first_char then find_first_char:=false
+    else last_char:=null;
+    end;
+  endcases;
+  p:=link(p);
+  end;
+done: check_box:=flag;
+end;
+
+@ Following procedure |adjust_hlist| inserts \.{\\xkanjiskip} between
+2byte-char and 1byte-char in hlist which pointed |p|.
+Note that the skip is inserted into a place where too difficult to decide
+whether inserting or not (i.e, before penalty, after penalty).
+
+If |pf| is true then insert |jchr_widow_penalty| that is penalty for
+creating a widow KANJI character line.
+
+@d no_skip=0
+@d after_schar=1 {denote after single byte character}
+@d after_wchar=2 {denote after double bytes character}
+
+@<Declare procedures needed in |hlist_out|, |vlist_out|@>=
+procedure adjust_hlist(p:pointer;pf:boolean);
+label exit;
+var q,s,t,u,v,x,z:pointer;
+  i,k:halfword;
+  a: pointer; { temporary pointer for accent }
+  insert_skip:no_skip..after_wchar;
+  cx:KANJI_code; {temporaly register for KANJI character}
+  ax:ASCII_code; {temporaly register for ASCII character}
+  do_ins:boolean; {for inserting |xkanji_skip| into prevous (or after) KANJI}
+begin if link(p)=null then goto exit;
+if auto_spacing>0 then
+  begin delete_glue_ref(space_ptr(p)); space_ptr(p):=kanji_skip;
+  add_glue_ref(kanji_skip);
+  end;
+if auto_xspacing>0 then
+  begin delete_glue_ref(xspace_ptr(p)); xspace_ptr(p):=xkanji_skip;
+  add_glue_ref(xkanji_skip);
+  end;
+u:=space_ptr(p); add_glue_ref(u);
+s:=xspace_ptr(p); add_glue_ref(s);
+if (not is_char_node(link(p))) {p1.0.9d}
+    and(type(link(p))=glue_node)and(subtype(link(p))=jfm_skip+1) then
+  begin v:=link(p); link(p):=link(v);
+  fast_delete_glue_ref(glue_ptr(v)); free_node(v,small_node_size);
+  end;
+i:=0; insert_skip:=no_skip; p:=link(p); v:=p; q:=p;
+while p<>null do
+  begin if is_char_node(p) then
+    begin repeat @<Insert a space around the character |p|@>;
+      q:=p; p:=link(p); incr(i);
+      if (i>5)and(pf) then
+        begin if is_char_node(v) then
+        if font_dir[font(v)]<>dir_default then v:=link(v);
+        v:=link(v);
+        end;
+    until not is_char_node(p);
+    end
+  else
+    begin case type(p) of
+    hlist_node: @<Insert hbox surround spacing@>;
+    ligature_node: @<Insert ligature surround spacing@>;
+    penalty_node,disp_node: @<Insert penalty or displace surround spacing@>;
+    kern_node: if (subtype(p)=explicit) then insert_skip:=no_skip
+      else if (subtype(p)=acc_kern) then begin 
+        { When we insert \.{\\xkanjiskip}, we first ignore accent (and kerns) and
+          insert \.{\\xkanjiskip}, then we recover the accent. }
+        if q=p then begin t:=link(p);
+          { if p is beginning on the list, we have only to ignore nodes. }
+          if is_char_node(t) then 
+            if font_dir[font(t)]<>dir_default then t:=link(t);
+          p:=link(link(t)); 
+	  if font_dir[font(p)]<>dir_default then 
+            begin p:=link(p); insert_skip:=after_wchar; end
+          else  insert_skip:=after_schar;
+          end
+        else begin
+          a:=p; t:=link(p);
+          if is_char_node(t) then 
+            if font_dir[font(t)]<>dir_default then t:=link(t);
+          t:=link(link(t)); link(q):=t; p:=t;
+          @<Insert a space around the character |p|@>; incr(i);
+          if (i>5)and(pf) then
+            begin if is_char_node(v) then
+            if font_dir[font(v)]<>dir_default then v:=link(v);
+            v:=link(v);
+            end;
+          if link(q)<>t then link(link(q)):=a else link(q):=a;
+          end;
+        end;
+    math_node: @<Insert math surround spacing@>;
+    mark_node,adjust_node,ins_node,whatsit_node:
+      {These nodes are vanished when typeset is done}
+      do_nothing;
+    othercases insert_skip:=no_skip;
+    endcases;
+    q:=p; p:=link(p);
+    end;
+  end;
+if (not is_char_node(q))and(type(q)=glue_node)and(subtype(q)=jfm_skip+1) then
+  begin fast_delete_glue_ref(glue_ptr(q));
+  glue_ptr(q):=zero_glue; add_glue_ref(zero_glue);
+  end;
+delete_glue_ref(u); delete_glue_ref(s);
+if (v<>null)and(pf)and(i>5) then @<Make |jchr_widow_penalty| node@>;
+exit:
+end;
+
+@ @<Insert a space around the character |p|@>=
+if font_dir[font(p)]<>dir_default then
+  begin KANJI(cx):=info(link(p));
+  if insert_skip=after_schar then @<Insert ASCII-KANJI spacing@>;
+  p:=link(p); insert_skip:=after_wchar;
+  end
+else
+  begin ax:=qo(character(p));
+  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
+  if auto_xsp_code(ax)>=2 then
+    insert_skip:=after_schar else insert_skip:=no_skip;
+  end
+
+@ @<Insert hbox surround spacing@>=
+begin find_first_char:=true; first_char:=null; last_char:=null;
+if (shift_amount(p)=0) then
+  begin if check_box(list_ptr(p)) then
+    begin if first_char<>null then @<Insert a space before the |first_char|@>;
+    if last_char<>null then
+      begin @<Insert a space after the |last_char|@>;
+      end else insert_skip:=no_skip;
+    end else insert_skip:=no_skip;
+  end else insert_skip:=no_skip;
+end
+
+@ @<Insert a space before the |first_char|@>=
+if font_dir[font(first_char)]<>dir_default then
+  begin KANJI(cx):=info(link(first_char));
+  if insert_skip=after_schar then @<Insert ASCII-KANJI spacing@>
+  else if insert_skip=after_wchar then @<Insert KANJI-KANJI spacing@>;
+  insert_skip:=after_wchar;
+  end
+else
+  begin ax:=qo(character(first_char));
+  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
+  if auto_xsp_code(ax)>=2 then
+    insert_skip:=after_schar else insert_skip:=no_skip;
+  end;
+
+@ @<Insert a space after the |last_char|@>=
+if font_dir[font(last_char)]<>dir_default then
+  begin insert_skip:=after_wchar;
+  if (is_char_node(link(p)))and(font_dir[font(link(p))]<>dir_default) then
+    begin @<Append KANJI-KANJI spacing@>; p:=link(p);
+    end;
+  end
+else
+  begin ax:=qo(character(last_char));
+  if auto_xsp_code(ax)>=2 then
+    insert_skip:=after_schar else insert_skip:=no_skip;
+  end;
+
+@ @<Insert math surround spacing@>=
+begin if (subtype(p)=before)and(insert_skip=after_wchar) then
+  begin ax:=qo("0"); @<Insert KANJI-ASCII spacing@>;
+  insert_skip:=no_skip;
+  end
+else if (subtype(p)=after) then
+  begin ax:=qo("0"); insert_skip:=after_schar;
+  end
+else insert_skip:=no_skip;
+end
+
+@ @<Insert ligature surround spacing@>=
+begin t:=lig_ptr(p);
+if is_char_node(t) then
+  begin ax:=qo(character(t));
+  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
+  while link(t)<>null do t:=link(t);
+  if is_char_node(t) then
+    begin ax:=qo(character(t));
+    if auto_xsp_code(ax)>=2 then
+      insert_skip:=after_schar else insert_skip:=no_skip;
+    end;
+  end;
+end
+
+@ @<Insert penalty or displace surround spacing@>=
+begin if is_char_node(link(p)) then
+  begin q:=p; p:=link(p);
+  if font_dir[font(p)]<>dir_default then
+    begin KANJI(cx):=info(link(p));
+    if insert_skip=after_schar then @<Insert ASCII-KANJI spacing@>
+    else if insert_skip=after_wchar then @<Insert KANJI-KANJI spacing@>;
+    p:=link(p); insert_skip:=after_wchar;
+    end
+  else
+    begin ax:=qo(character(p));
+    if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
+    if auto_xsp_code(ax)>=2 then
+      insert_skip:=after_schar else insert_skip:=no_skip;
+    end;
+  end
+end
+
+@ @<Insert ASCII-KANJI spacing@>=
+begin
+  begin x:=get_inhibit_pos(cx,cur_pos);
+  if x<>no_entry then
+    if (inhibit_xsp_type(x)=inhibit_both)or
+       (inhibit_xsp_type(x)=inhibit_previous) then
+      do_ins:=false else do_ins:=true
+  else do_ins:=true;
+  end;
+if do_ins then
+  begin z:=new_glue(s); subtype(z):=xkanji_skip_code+1;
+  link(z):=link(q); link(q):=z; q:=z;
+  end;
+end
+
+@ @<Insert KANJI-ASCII spacing@>=
+begin if (auto_xsp_code(ax) mod 2)=1 then
+  begin x:=get_inhibit_pos(cx,cur_pos);
+  if x<>no_entry then
+    if (inhibit_xsp_type(x)=inhibit_both)or
+       (inhibit_xsp_type(x)=inhibit_after) then
+      do_ins:=false else do_ins:=true
+  else do_ins:=true;
+  end
+else do_ins:=false;
+if do_ins then
+  begin z:=new_glue(s); subtype(z):=xkanji_skip_code+1;
+  link(z):=link(q); link(q):=z; q:=z;
+  end;
+end
+
+@ @<Insert KANJI-KANJI spacing@>=
+begin z:=new_glue(u); subtype(z):=kanji_skip_code+1;
+link(z):=link(q); link(q):=z; q:=z;
+end
+
+@ @<Append KANJI-KANJI spacing@>=
+begin z:=new_glue(u); subtype(z):=kanji_skip_code+1;
+link(z):=link(p); link(p):=z; p:=link(z); q:=z;
+end
+
+@ @<Make |jchr_widow_penalty| node@>=
+begin q:=v; p:=link(v);
+if (is_char_node(v))and(font_dir[font(v)]<>dir_default) then
+  begin q:=p; p:=link(p);
+  end;
+t:=q; s:=null;
+@<Seek list and make |t| pointing widow penalty position@>;
+if (s<>null) then
+  begin s:=link(t);
+    if (not is_char_node(s))and(type(s)=penalty_node) then
+      penalty(s):=penalty(s)+jchr_widow_penalty
+    else if (jchr_widow_penalty<>0) then
+      begin s:=new_penalty(jchr_widow_penalty); subtype(s):=widow_pena;
+      link(s):=link(t); link(t):=s; t:=link(s);
+      while(not is_char_node(t)) do
+        begin if (type(t)=glue_node)or(type(t)=kern_node) then goto exit;
+        t:=link(t);
+        end;
+      z:=new_glue(u); subtype(z):=kanji_skip_code+1;
+      link(z):=link(s); link(s):=z;
+      end;
+  end;
+end;
+
+@ @<Seek list and make |t| pointing widow penalty position@>=
+while(p<>null) do
+begin if is_char_node(p) then
+  begin if font_dir[font(p)]<>dir_default then
+    begin KANJI(cx):=info(link(p)); i:=kcat_code(kcatcodekey(cx)); k:=0;
+    if (i=kanji)or(i=kana) then begin t:=q; s:=p; end;
+    p:=link(p); q:=p;
+    end
+  else begin k:=k+1;
+    if k>1 then begin q:=p; s:=null; end;
+    end;
+  end
+else begin case type(p) of
+  penalty_node,mark_node,adjust_node,whatsit_node,
+  glue_node,kern_node,math_node,disp_node:
+    do_nothing;
+  othercases begin q:=p; s:=null; end;
+  endcases;
+  end;
+p:=link(p);
+end
+
+@ @<Declare procedures needed in |hlist_out|, |vlist_out|@>=
+procedure dir_out;
+var @!this_box: pointer; {pointer to containing box}
+begin this_box:=temp_ptr;
+  temp_ptr:=list_ptr(this_box);
+  if (type(temp_ptr)<>hlist_node)and(type(temp_ptr)<>vlist_node) then
+    confusion("dir_out");
+  case box_dir(this_box) of
+  dir_yoko:
+    case box_dir(temp_ptr) of
+    dir_tate: {Tate in Yoko}
+      begin cur_v:=cur_v-height(this_box); cur_h:=cur_h+depth(temp_ptr) end;
+    dir_dtou: {DtoU in Yoko}
+      begin cur_v:=cur_v+depth(this_box); cur_h:=cur_h+height(temp_ptr) end;
+    endcases;
+  dir_tate:
+    case box_dir(temp_ptr) of
+    dir_yoko: {Yoko in Tate}
+      begin cur_v:=cur_v+depth(this_box); cur_h:=cur_h+height(temp_ptr) end;
+    dir_dtou: {DtoU in Tate}
+      begin
+        cur_v:=cur_v+depth(this_box)-height(temp_ptr);
+        cur_h:=cur_h+width(temp_ptr)
+      end;
+    endcases;
+  dir_dtou:
+    case box_dir(temp_ptr) of
+    dir_yoko: {Yoko in DtoU}
+      begin cur_v:=cur_v-height(this_box); cur_h:=cur_h+depth(temp_ptr) end;
+    dir_tate: {Tate in DtoU}
+      begin
+        cur_v:=cur_v+depth(this_box)-height(temp_ptr);
+        cur_h:=cur_h+width(temp_ptr)
+      end;
+    endcases;
+  endcases;
+  cur_dir_hv:=box_dir(temp_ptr);
+  if type(temp_ptr)=vlist_node then vlist_out@+else hlist_out;
+end;
+
+@ These routines are used to output diagnostic which related direction.
+
+@ @<Basic printing procedures@>=
+procedure print_dir(@!dir:eight_bits); {prints |dir| data}
+begin if dir=dir_yoko then print_char("Y")
+else if dir=dir_tate then print_char("T")
+else if dir=dir_dtou then print_char("D")
+end;
+@#
+procedure print_direction(@!d:integer); {print the direction represented by d}
+begin case abs(d) of
+dir_yoko: print("yoko");
+dir_tate: print("tate");
+dir_dtou: print("dtou");
+end;
+if d<0 then print("(math)");
+print(" direction");
+end;
+
+@ The procedure |set_math_kchar| is same as |set_math_char| which
+written in section 48.
+
+@<Declare act...@>=
+procedure set_math_kchar(@!c:integer);
+var p:pointer; {the new noad}
+begin p:=new_noad; math_type(nucleus(p)):=math_jchar;
+character(nucleus(p)):=qi(0);
+math_kcode(p):=c; fam(nucleus(p)):=cur_jfam;
+if font_dir[fam_fnt(fam(nucleus(p))+cur_size)]=dir_default then
+  begin print_err("Not two-byte family");
+  help1("IGNORE.");@/
+  error;
+  end;
+type(p):=ord_noad;
+link(tail):=p; tail:=p;
+end;
+
+@ This section is a part of |main_control|.
+
+@<Append KANJI-character |cur_chr| ...@>=
+if is_char_node(tail) then
+  begin cx:=qo(character(tail)); @<Insert |post_break_penalty|@>;
+  end
+else if type(tail)=ligature_node then
+  begin cx:=qo(character(lig_char(tail))); @<Insert |post_break_penalty|@>;
+  end;
+if direction=dir_tate then
+  begin if font_dir[main_f]=dir_tate then disp:=0
+  else if font_dir[main_f]=dir_yoko then disp:=t_baseline_shift-y_baseline_shift
+  else disp:=t_baseline_shift;
+  main_f:=cur_tfont;
+  end
+else
+  begin if font_dir[main_f]=dir_yoko then disp:=0
+  else if font_dir[main_f]=dir_tate then disp:=y_baseline_shift-t_baseline_shift
+  else disp:=y_baseline_shift;
+  main_f:=cur_jfont;
+  end;
+@<Append |disp_node| at end of displace area@>;
+ins_kp:=false; ligature_present:=false;
+cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
+main_i:=orig_char_info(main_f)(qi(0));
+goto main_loop_j+3;
+@#
+main_loop_j+1: space_factor:=1000;
+  fast_get_avail(main_p); font(main_p):=main_f; character(main_p):=cur_l;
+  link(tail):=main_p; tail:=main_p; last_jchr:=tail;
+  fast_get_avail(main_p); info(main_p):=KANJI(cur_chr);
+  link(tail):=main_p; tail:=main_p;
+  cx:=cur_chr; @<Insert kinsoku penalty@>;
+  ins_kp:=false;
+again_2:
+  get_next;
+  main_i:=orig_char_info(main_f)(cur_l);
+  case cur_cmd of
+    kanji,kana,other_kchar: begin
+      cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f)); goto main_loop_j+3;
+      end;
+    letter,other_char: begin ins_kp:=true; cur_l:=qi(0); goto main_loop_j+3;
+      end;
+  endcases;
+  x_token;
+  case cur_cmd of
+    kanji,kana,other_kchar: cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
+    letter,other_char: begin ins_kp:=true; cur_l:=qi(0); end;
+    char_given: begin
+      if is_char_ascii(cur_chr) then
+        begin ins_kp:=true; cur_l:=qi(0);
+        end
+      else cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
+      end;
+    char_num: begin scan_char_num; cur_chr:=cur_val;
+      if is_char_ascii(cur_chr) then
+        begin ins_kp:=true; cur_l:=qi(0);
+        end
+      else cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
+      end;
+    inhibit_glue: begin inhibit_glue_flag:=true; goto again_2; end;
+    othercases begin ins_kp:=max_halfword;
+      cur_l:=qi(0); cur_r:=non_char; lig_stack:=null;
+      end;
+  endcases;
+@#
+main_loop_j+3:
+  if ins_kp=true then @<Insert |pre_break_penalty| of |cur_chr|@>;
+  @<Look ahead for glue or kerning@>;
+  if (ins_kp=false) then begin { Kanji -> Kanji }
+    goto main_loop_j+1;
+  end else if (ins_kp=true) then begin { Kanji -> Ascii }
+    {@<Append |disp_node| at begin of displace area@>;}
+    ins_kp:=false; goto main_loop;
+  end else begin { Kanji -> cs }
+    {@<Append |disp_node| at begin of displace area@>;}
+    goto reswitch;
+  end;
+
+@ @<Append |disp_node| at begin ...@>=
+begin if (not is_char_node(tail))and(type(tail)=disp_node) then
+  begin if prev_disp=disp then
+    begin free_node(tail,small_node_size); tail:=prev_node; link(tail):=null;
+    end
+  else disp_dimen(tail):=disp;
+  end
+else
+  if disp<>0 then
+    begin prev_node:=tail; tail_append(get_node(small_node_size));
+    type(tail):=disp_node; disp_dimen(tail):=disp; prev_disp:=disp;
+    end;
+end;
+
+@ @<Append |disp_node| at end ...@>=
+if disp<>0 then
+begin if (not is_char_node(tail))and(type(tail)=disp_node) then
+  begin disp_dimen(tail):=0;
+  end
+else
+  begin prev_node:=tail; tail_append(get_node(small_node_size));
+  type(tail):=disp_node; disp_dimen(tail):=0; prev_disp:=disp;
+  end;
+end;
+
+@ @<Look ahead for glue or kerning@>=
+cur_q:=tail;
+if inhibit_glue_flag<>true then
+  begin if char_tag(main_i)=gk_tag then
+    begin main_k:=glue_kern_start(main_f)(main_i);
+    repeat main_j:=font_info[main_k].qqqq;
+    if next_char(main_j)=cur_l then
+      begin if op_byte(main_j)<kern_flag then
+        begin gp:=font_glue[main_f]; cur_r:=rem_byte(main_j);
+        if gp<>null then
+          begin while((type(gp)<>cur_r)and(link(gp)<>null)) do gp:=link(gp);
+          gq:=glue_ptr(gp);
+          end
+        else
+          begin gp:=get_node(small_node_size); font_glue[main_f]:=gp;
+          gq:=null;
+          end;
+        if gq=null then
+          begin type(gp):=cur_r; gq:=new_spec(zero_glue);
+          glue_ptr(gp):=gq;
+          main_k:=exten_base[main_f]+qi((qo(cur_r))*3);
+          width(gq):=font_info[main_k].sc;
+          stretch(gq):=font_info[main_k+1].sc;
+          shrink(gq):=font_info[main_k+2].sc;
+          add_glue_ref(gq); link(gp):=get_node(small_node_size);
+          gp:=link(gp); glue_ptr(gp):=null; link(gp):=null;
+          end;
+        tail_append(new_glue(gq)); subtype(tail):=jfm_skip+1;
+        goto skip_loop;
+        end
+      else  begin
+        tail_append(new_kern(char_kern(main_f)(main_j)));
+        goto skip_loop;
+        end;
+    end;
+  incr(main_k);
+  until skip_byte(main_j)>=stop_flag;
+  end;
+end;
+skip_loop: inhibit_glue_flag:=false;
+
+@ @<Basic printing...@>=
+procedure print_kanji(@!s:KANJI_code); {prints a single character}
+begin
+if s>255 then
+  begin print_char(Hi(s)); print_char(Lo(s));
+  end else print_char(s);
+end;
+
+@* \[56] System-dependent changes.
+@z