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-- hex dump
-- usage: lua xd.lua < file
local offset=0
while true do
local s=io.read(16)
if s==nil then return end
io.write(string.format("%08X ",offset))
string.gsub(s,"(.)",
function (c) io.write(string.format("%02X ",string.byte(c))) end)
io.write(string.rep(" ",3*(16-string.len(s))))
io.write(" ",string.gsub(s,"%c","."),"\n")
offset=offset+16
end
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