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Beeton's hyphenation exception log reports which appear irregularly
in TUGBoat).
* tmac/hyphen.us: Updated to latest version.
* tmac/README: Updated.
* tmac/hyphenex.us, tmac/hyphenex.sh: New files.
* tmac/troffrc: Load `hyphenex.us'.
* tmac/Makefile.sub (NORMALFILES): Add `hyphenex.us'.
* doc/groff.texinfo: Updated.
Improve hyphenation slightly. This is a first step in redesigning
the hyphenation algorithm to make it more flexible (e.g. allowing
kerns and ligatures between the hyphenation character and the
following character -- while not used normally in English, other
languages like German would benefit).
* src/roff/troff/env.cc (environment::hyphenate_line): Use
assertion instead of if-clause.
Let `get_hyphen_list' return the number of involved characters in
the hyphenation pattern instead of computing it directly (which
often yields too small values).
* src/roff/troff/node.h (*::get_hyphen_list): Add second parameter.
* src/roff/troff/node.cc (*::get_hyphen_list): Handle new second
parameter.
Fixing a bug which caused groff to hang if the hyphenation exception
dictionary tried to grow.
* src/roff/troff/env.cc (hyphen_trie::insert_hyphenation,
hyphen_trie::read_patterns_file, do_hyphenation_patterns_file): Use
pointer to dictionary.
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use most of TeX's pattern files unmodified. To make the process
more flexible, a new request `hpfcode' has been added which
provides a character code mapping for the `hpf' request. See
comment before hpf_getc() for more details.
* src/roff/troff/env.cc (insert_hyphenation, hpf_getc): New
functions.
(read_patterns_file): Additional parameter for exception dictionary.
Extended to recognize \pattern, \hyphenation, and \endinput.
(do_hyphenation_patterns_file): Updated.
* src/roff/troff/env.h (hpf_code_table): New extern.
* src/roff/troff/input.cc (hpf_code_table): New array.
(init_hpf_code_table, hyphenation_patterns_file_code): New
functions.
(hyphenation_code): Handle translation from `trin' correctly.
(main, init_input_requests): Updated.
(charinfo::set_translation): Handle hyphenation code also.
* src/roff/troff/charinfo.h (charinfo::get_translation_input): New
inline function.
* src/roff/troff/env.cc (WORD_MAX): Reduced to 256 since `unsigned
char' is used for offsets in hyphenation exceptions.
* tmac/hyphen.us: Replace with contents of unmodified `hyphen.tex'.
* NEWS, man/groff_diff.man, man/groff.man: Document it.
* doc/groff.texinfo: Document possible conflict between `tr' and
`char' requests.
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