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-- the following is adapted from https://tex.stackexchange.com/a/380780
ft = {}
function ft.print_glyphs(maxCols,maxChars)
local id = font.current()
local fnt = font.getfont(id)
local col = 1
local maxU4 = 15*(16^3+16^2+16+1)
a = {}
for k, v in pairs(fnt.characters) do
a [#a + 1] = k
end
table.sort(a)
for i, k in ipairs(a) do
if i >= maxChars then break end
if col == 1 then
if k > maxU4 then
tex.sprint(string.format("U+%06x", k))
else
tex.sprint(string.format("U+%04x", k))
end
tex.sprint("&")
end
if (i) then
tex.sprint(string.format([[\char%i]], k))
else
tex.sprint("~")
end
if col == maxCols then
tex.sprint([[\\\cline{2-]] .. maxCols+1 .. "} ")
col = 1
else
tex.sprint("&")
col = col + 1
end
end
end
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