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\documentclass{book} | |
\usepackage{fontspec} | |
\setmainfont{Coelacanth} | |
\usepackage{luacode} | |
\begin{luacode*} | |
-- table with mappings from unicode to char codes | |
unicode_chars = {} | |
function load_unicode_chars(current_font) | |
local chars = {} | |
-- process all characters in the font | |
for i,v in pairs(fonts.hashes.identifiers[current_font].characters or {}) do | |
local univalue = v.unicode | |
-- save the mapping from unicode to the character index | |
if univalue then chars[v.unicode] = i end | |
end | |
-- cache the character table | |
unicode_chars[current_font] = chars | |
return chars | |
end | |
function get_unicode_char(character) | |
local current_font = font.current() | |
-- get the saved character table for the current font, or generate a new one | |
local current_font_chars = unicode_chars[current_font] or load_unicode_chars(current_font) | |
return current_font_chars[character] | |
end | |
local utf_char = utf.char | |
function print_unicode_char(character) | |
local num | |
if character:match('^"') then | |
character = character:sub(2) | |
num = tonumber(character, 16) | |
else | |
num = tonumber(character) | |
end | |
tex.print(utf_char(get_unicode_char(num))) | |
end | |
\end{luacode*} | |
% \newcommand\byunicode[1]{\directlua{tex.print(utf.char(get_unicode_char(tonumber("#1"))))}} | |
\newcommand\byunicode[1]{\directlua{print_unicode_char("\luatexluaescapestring{#1}")}} | |
\let\altbyunicode\byunicode | |
\begin{document} | |
\byunicode{62860} \byunicode{\number"F58C} | |
\byunicode{62860} \byunicode{"F58C} | |
\end{document} |
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