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From: Antti Louko <alo@earn.fingate>
To: spqr@uk.ac.soton.cm
In-Reply-To: 
             Sebastian Rahtz's message of Wed, 20 Jul 88 17:43:37 GMT <88072017
Subject:     multiple hyphenations
Resent-Date:  Fri, 22 Jul 88 15:51:16 GMT
Resent-From: spqr@uk.ac.soton.cm
Resent-To: abbottp@uk.ac.aston.mail

I have modified TeX to handle multiple hyphenation languages. This is
done with integer parameter \patternsnum, which selects the pattern
set currently used. The TeX version I modified is the web-to-c
version. It should work with most UNIX-machines.
 
For example:
 
% tex
This is TeX, C Version 2.9 (preloaded format=plain 88.7.5)
**\relax
 
*\patternsnum=0    % Well, this is default (English)
 
*\showhyphens{hyphenation}
 
Underfull \hbox (badness 10000) detected at line 0
[] \tenrm hy-phen-ation
 
*\showhyphens{tavutus}    % tavutus = hyphenation in Finnish
 
Underfull \hbox (badness 10000) detected at line 0
[] \tenrm tavu-tus
 
*\patternsnum=1    % Finnish
 
*\showhyphens{hyphenation}
 
Underfull \hbox (badness 10000) detected at line 0
[] \tenrm hyp-he-na-tion
 
*\showhyphens{tavutus}
 
Underfull \hbox (badness 10000) detected at line 0
[] \tenrm ta-vu-tus
 
*\bye
(see the transcript file for additional information)
No pages of output.
Transcript written on texput.log.
%
 
You can see how the hyphenation changes. \patternsnum is used also
with the \patterns primitive, when TeX reads all the patterns. This is
our /usr/lib/tex/macros/hyphen.tex file:
 
\patternsnum=0
\input enghyphen  % English hyphenation patterns (the original hyphen.tex)
\patternsnum=1
\input fh         % Finnish hyphenation patterns
\patternsnum=0    % Reset to the default
 
If \patternsnum <> 0 accents, hyphenation algorithm sees accented
characters as pairs: \"a shows as ~~?a etc. This is useful with
many languages.
 
\patternsnum can be used in an environment where many languages are needed in
the same document. \patternsnum affects when the whole paragraph is
being hyphenated; that means that you should change change
\patternsnum immediately after a \par.
 
I sent diffs to ctex.ch file with this. If moderator wants to place it
in a public place, please do so. It could be a good idea to send them
to UNIX-TeX distributor, too.
 
The diff is below. It passes the trip test.
 
*** ctex.ch.orig        Mon Jun 20 15:29:23 1988
--- ctex.ch     Wed Jul 13 17:16:44 1988
***************
*** 12,17 ****
--- 12,19 ----
  % (1 /14/88) ETM Brought up to TeX 2.9
  % (2 /20/88) PAM Revised format and module numbers
  % (3 /1 /88) ETM Eliminated some unused variables and unnecesary tests
+ % (21.6.88)  alo@santra Added Finnish hyphenation
+ % (5.7.88)   alo@santra Added alternate hyphenation patterns capability
 
  % NOTE: the module numbers in this change file refer to the published
  %     text in TeX, the Program, Volume B. 1986
***************
*** 19,25 ****
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [0] WEAVE: only print changes
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
! @x Tell WEAVE to print only the changes: l.69
    \def\?##1]{\hbox to 1in{\hfil##1.\ }}
    }
  @y
--- 21,28 ----
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [0] WEAVE: only print changes
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
! % Tell WEAVE to print only the changes:
! @x l.69
    \def\?##1]{\hbox to 1in{\hfil##1.\ }}
    }
  @y
***************
*** 193,198 ****
--- 196,202 ----
    at most |max_halfword|}
  @!trie_size=8000; {space for hyphenation patterns; should be larger for
    \.{INITEX} than it is in production versions of \TeX}
+ @!pat_num_max=1; {maximum number of hyphenation patterns -1}
  @!dvi_buf_size=16384; {size of the output buffer; must be a multiple of 8}
  @!file_name_size=1024; {file names shouldn't be longer than this}
  @!pool_name='tex.pool';
***************
*** 837,842 ****
--- 841,852 ----
  if r>toint(p+1) then @<Allocate from the top of node |p| and |goto found|@>;
  @z
 
+ @x l.3236
+ @!k:integer; {index into |mem|, |eqtb|, etc.}
+ @y
+ @!j,k:integer; {index into |mem|, |eqtb|, etc.}
+ @z
+
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [11.165] fix the word "free" so that it doesn't conflict with the C routine
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
***************
*** 923,928 ****
--- 933,976 ----
    end
  @z
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+ % Finnish hyphenation
+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+ @x l.4833
+ @d new_line_char_code=49 {character that prints as |print_ln|}
+ @d int_pars=50 {total number of integer parameters}
+ @y
+ @d new_line_char_code=49 {character that prints as |print_ln|}
+ @d pat_num_code=50 {}
+ @d int_pars=51 {total number of integer parameters}
+ @z
+
+ @x l.4891
+ @d new_line_char==int_par(new_line_char_code)
+ @y
+ @d new_line_char==int_par(new_line_char_code)
+ @d pat_num==int_par(pat_num_code)
+ @z
+
+ @x l.4950
+ new_line_char_code:print_esc("newlinechar");
+ @y
+ new_line_char_code:print_esc("newlinechar");
+ pat_num_code:print_esc("patternsnum");
+ @z
+
+ @x l.5059
+ 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("patternsnum",assign_int,int_base+pat_num_code);@/
+ @!@:pat_num_}{\.{\\pat_num} primitive@>
+ @z
+
+ %% End of Finnish
+
+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [17.241] fix_date_and_time
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  @x l.5079
***************
*** 1148,1154 ****
  make_name_string:=make_string;
  end;
 
! {The X_make_name_string functions are changed to macros in C}
  @z
 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
--- 1196,1202 ----
  make_name_string:=make_string;
  end;
 
! {The |X_make_name_string| functions are changed to macros in C}
  @z
 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
***************
*** 1259,1264 ****
--- 1307,1449 ----
  @z
 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+ % Changes for Finnish hyphenation
+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+ @x l.16983
+ @!hu:array[1..63] of ASCII_code; {like |hc|, before conversion to lowercase}
+ @!hyf_char:integer; {hyphen character of the relevant font}
+ @y
+ @!hu:array[1..63] of ASCII_code; {like |hc|, before conversion to lowercase}
+ @!hyf_char:integer; {hyphen character of the relevant font}
+ @!hacc:array[1..63] of pointer;
+ @z
+
+ @x l.16990
+ @!c:0..255; {character being considered for hyphenation}
+ @y
+ @!c:0..255; {character being considered for hyphenation}
+ @!s2,s3:pointer;
+ @z
+
+ @x l.16998
+   begin @<Skip to node |ha|, or |goto done1| if no hyphenation
+ @y
+   begin if ((pat_num>pat_num_max)or(pat_num<0)) then pat_num:=0;
+   @<Skip to node |ha|, or |goto done1| if no hyphenation
+ @z
+
+ @x l.17002
+     at least five letters have been found, otherwise |goto done1|@>;
+   hyphenate;
+   end;
+ done1: end
+ @y
+     at least five letters have been found, otherwise |goto done1|@>;
+   hyphenate;
+   end;
+ done1: while hn>0 do begin if hacc[hn]<>null then
+   flush_node_list(hacc[hn]); decr(hn); end;
+ end
+ @z
+
+ @x l.17028
+   else if (type(s)=kern_node)and(subtype(s)=normal) then c:=128
+ @y
+   else if (type(s)=kern_node)and(subtype(s)=normal) then c:=128
+   else if (type(s)=kern_node)and(subtype(s)=acc_kern)and(pat_num<>0) then
+     begin s2:=link(s);
+     if is_char_node(s2) then
+       begin c:=qo(character(s2)); hf:=font(s2);
+       end
+     else goto done1
+     end
+ @z
+
+ @x l.17036
+ done2: hyf_char:=hyphen_char[hf];
+ if hyf_char<0 then goto done1;
+ if hyf_char>255 then goto done1;
+ @y
+ done2: hyf_char:=hyphen_char[hf];
+ if hyf_char<0 then goto done1;
+ if hyf_char>255 then goto done1;
+ for j:=1 to 63 do hacc[j]:=null;
+ @z
+
+ @x l.17053
+     @<Move the characters of a ligature node to |hu| and |hc|;
+       but |goto done3| if they are not all letters@>
+ @y
+     @<Move the characters of a ligature node to |hu| and |hc|;
+       but |goto done3| if they are not all letters@>
+   else if (type(s)=kern_node)and(subtype(s)=acc_kern)and(pat_num<>0) then
+     begin
+     s3:=link(s);
+     link(s):=null;
+     hacc[hn+1]:=copy_node_list(s);
+     link(s):=s3;
+     end
+ @z
+
+ @x l.17199
+ @ @<Look for a ligature or kern between |d| and...@>=
+ if j=n then goto done;
+ @y
+ @ @<Look for a ligature or kern between |d| and...@>=
+ if j=n then goto done;
+ if hacc[j+1]<>null then goto done;
+ @z
+
+ @x l.17251
+ @<Reconstitute nodes for the hyphenated word...@>=
+ j:=0;
+ repeat l:=j; j:=reconstitute(j+1,hn);
+ @y
+ @<Reconstitute nodes for the hyphenated word...@>=
+ j:=0;
+ repeat l:=j;
+ if hacc[j+1]<>null then
+   begin link(s):=copy_node_list(hacc[j+1]);
+   s:=link(s);
+   end;
+ j:=reconstitute(j+1,hn);
+ @z
+
+ @x l.17385
+ @ @d trie_link(#)==trie[#].rh {``downward'' link in a trie}
+ @d trie_char(#)==trie[#].b1 {character matched at this trie location}
+ @d trie_op(#)==trie[#].b0 {program for hyphenation at this trie location}
+
+ @<Glob...@>=
+ @!trie:array[trie_pointer] of two_halves; {|trie_link|, |trie_char|, |trie_op|
+ @!hyf_distance:array[quarterword] of small_number; {position |k-j| of $n_j$}
+ @!hyf_num:array[quarterword] of small_number; {value of $n_j$}
+ @!hyf_next:array[quarterword] of quarterword; {continuation of this |trie_op|}
+ @y
+ @ @d trie==trie_arr[pat_num]
+ @d trie_link(#)==trie[#].rh {``downward'' link in a trie}
+ @d trie_char(#)==trie[#].b1 {character matched at this trie location}
+ @d trie_op(#)==trie[#].b0 {program for hyphenation at this trie location}
+ @d hyf_distance==hyf_distance_arr[pat_num]
+ @d hyf_num==hyf_num_arr[pat_num]
+ @d hyf_next==hyf_next_arr[pat_num]
+ @d trie_max==trie_max_arr[pat_num]
+
+ @<Glob...@>=
+ @!trie_arr:array[0..pat_num_max] of array[trie_pointer] of two_halves;
+       {|trie_link|, |trie_char|, |trie_op|}
+ @!hyf_distance_arr:array[0..pat_num_max] of array[quarterword] of small_number
+       {position |k-j| of $n_j$}
+ @!hyf_num_arr:array[0..pat_num_max] of array[quarterword] of small_number;
+       {value of $n_j$}
+ @!hyf_next_arr:array[0..pat_num_max] of array[quarterword] of quarterword;
+       {continuation of this |trie_op|}
+ @z
+
+ %% End of Finnish
+
+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [43.944] Fix a C casting/expression evaluation problem
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  @x l.17672
***************
*** 1278,1283 ****
--- 1463,1496 ----
      2718*toint(trie_l[p])+3142*toint(trie_r[p])) mod trie_size;
  @z
 
+ @x l.17774
+ begin for h:=0 to trie_op_hash_size do trie_op_hash[h]:=min_quarterword;
+ @y
+ begin if ((pat_num>pat_num_max)or(pat_num<0)) then pat_num:=0;
+ for h:=0 to trie_op_hash_size do trie_op_hash[h]:=min_quarterword;
+ @z
+
+ @x l.17805
+ @t\hskip1em@>@!trie_max:trie_pointer; {largest location used in |trie|}
+ @y
+ @t\hskip1em@>@!trie_max_arr:array[0..pat_num_max] of trie_pointer;
+       {largest location used in |trie|}
+ @z
+
+ @x l.17827
+ trie_link(0):=0; trie_char(0):=0; trie_op(0):=min_quarterword;
+ for k:=1 to 127 do trie[k]:=trie[0];
+ trie_max:=127;
+ @y
+ for j:=0 to pat_num_max do
+ begin pat_num:=j;
+ trie_link(0):=0; trie_char(0):=0; trie_op(0):=min_quarterword;
+ for k:=1 to 127 do trie[k]:=trie[0];
+ trie_max:=127
+ end;
+ pat_num:=0;
+ @z
+
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [49.1275] a_open_in of \read file needs path specifier
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
***************
*** 1439,1445 ****
  dump_things(eqtb[k], l-k);
  @z
 
! @x l.23037
  while k<l do
    begin dump_wd(eqtb[k]); incr(k);
    end;
--- 1652,1658 ----
  dump_things(eqtb[k], l-k);
  @z
 
! @x l.23056
  while k<l do
    begin dump_wd(eqtb[k]); incr(k);
    end;
***************
*** 1609,1615 ****
  end
  @z
 
! @x l.23169
  for k:=0 to trie_max do dump_hh(trie[k]);
  dump_int(trie_op_ptr);
  for k:=min_quarterword+1 to trie_op_ptr do
--- 1822,1829 ----
  end
  @z
 
! @x l.23168
! dump_int(trie_max);
  for k:=0 to trie_max do dump_hh(trie[k]);
  dump_int(trie_op_ptr);
  for k:=min_quarterword+1 to trie_op_ptr do
***************
*** 1618,1631 ****
    dump_int(hyf_next[k]);
    end;
  @y
  dump_things(trie[0], trie_max+1);
  dump_int(trie_op_ptr);
  dump_things(hyf_distance[min_quarterword+1], trie_op_ptr-min_quarterword);
  dump_things(hyf_num[min_quarterword+1], trie_op_ptr-min_quarterword);
  dump_things(hyf_next[min_quarterword+1], trie_op_ptr-min_quarterword);
  @z
 
! @x l.23191
  for k:=0 to trie_max do undump_hh(trie[k]);
  undump(min_quarterword)(max_quarterword)(trie_op_ptr);
  for k:=min_quarterword+1 to trie_op_ptr do
--- 1832,1852 ----
    dump_int(hyf_next[k]);
    end;
  @y
+ dump_int(pat_num_max);
+ for j:=0 to pat_num_max do
+ begin
+ pat_num := j;
+ dump_int(trie_max);
  dump_things(trie[0], trie_max+1);
  dump_int(trie_op_ptr);
  dump_things(hyf_distance[min_quarterword+1], trie_op_ptr-min_quarterword);
  dump_things(hyf_num[min_quarterword+1], trie_op_ptr-min_quarterword);
  dump_things(hyf_next[min_quarterword+1], trie_op_ptr-min_quarterword);
+ end;
  @z
 
! @x l.23190
! undump_size(0)(trie_size)('trie size')(trie_max);
  for k:=0 to trie_max do undump_hh(trie[k]);
  undump(min_quarterword)(max_quarterword)(trie_op_ptr);
  for k:=min_quarterword+1 to trie_op_ptr do
***************
*** 1634,1644 ****
--- 1855,1872 ----
    undump(min_quarterword)(max_quarterword)(hyf_next[k]);
    end
  @y
+ undump_size(0)(pat_num_max)('pat_num_max')(j);
+ for j:=0 to pat_num_max do
+ begin
+ pat_num:=j;
+ undump_size(0)(trie_size)('trie size')(trie_max);
  undump_things(trie[0], trie_max+1);
  undump(min_quarterword)(max_quarterword)(trie_op_ptr);
  undump_things(hyf_distance[min_quarterword+1], trie_op_ptr-min_quarterword);
  undump_things(hyf_num[min_quarterword+1], trie_op_ptr-min_quarterword);
  undump_things(hyf_next[min_quarterword+1], trie_op_ptr-min_quarterword);
+ end;
+ pat_num:=0;
  @z
 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
***************
*** 1722,1727 ****
--- 1950,1976 ----
  @z
 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+ % Finnish
+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+ @x l.23554
+ incompatible extensions of \TeX\ from proliferating.
+ @~system dependencies@>
+ @~extensions to \TeX@>
+
+ @y
+ incompatible extensions of \TeX\ from proliferating.
+ @~system dependencies@>
+ @~extensions to \TeX@>
+
+ The support for different hyphenation algorithms is also implemented
+ as an extension.
+ @~Finnish hyphenation@>
+
+ @z
+
+ %% End of Finnish
+
+ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % [54.1376] add editor-switch variables to globals
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  @x l.23926
***************
*** 1735,1741 ****
  @~system dependencies@>
  @y
  Here is a temporary integer, used as a holder during reading and writing of
! TFM files, and a temporary memory_word, used in reading/writing format
  files.
  Also, the variables used to hold ``switch-to-editor'' information.
  @~<system dependencies@>
--- 1984,1990 ----
  @~system dependencies@>
  @y
  Here is a temporary integer, used as a holder during reading and writing of
! TFM files, and a temporary |memory_word|, used in reading/writing format
  files.
  Also, the variables used to hold ``switch-to-editor'' information.
  @~<system dependencies@>
 
*---------------------------------------------------------------------------*
 alo@santra.UUCP (mcvax!santra!alo)       Antti Louko
 alo@santra.hut.fi                        Helsinki University of Technology
 alo@fingate.bitnet                       Computing Centre
 alo%fingate.bitnet@cunyvm.cuny.edu       SF-02150, Espoo
                                          FINLAND
                                          tel. +358 0 4512624
*---------------------------------------------------------------------------*