| -- The Computer Language Shootout |
| -- http://shootout.alioth.debian.org/ |
| -- contributed by Mike Pall (with ideas from Rici Lake) |
| |
| local sub = string.sub |
| iubc = setmetatable({ |
| A="T", C="G", B="V", D="H", K="M", R="Y", |
| a="T", c="G", b="V", d="H", k="M", r="Y", |
| T="A", G="C", V="B", H="D", M="K", Y="R", U="A", |
| t="A", g="C", v="B", h="D", m="K", y="R", u="A", |
| N="N", S="S", W="W", n="N", s="S", w="W", |
| }, { __index = function(t, s) |
| local r = t[sub(s, 2)]..t[sub(s, 1, 1)]; t[s] = r; return r end }) |
| |
| local wcode = [=[ |
| return function(t, n) |
| if n == 1 then return end |
| local iubc, sub, write = iubc, string.sub, io.write |
| local s = table.concat(t, "", 1, n-1) |
| for i=#s-59,1,-60 do |
| write(]=] |
| for i=59,3,-4 do wcode = wcode.."iubc[sub(s, i+"..(i-3)..", i+"..i..")], " end |
| wcode = wcode..[=["\n") |
| end |
| local r = #s % 60 |
| if r ~= 0 then |
| for i=r,1,-4 do write(iubc[sub(s, i-3 < 1 and 1 or i-3, i)]) end |
| write("\n") |
| end |
| end |
| ]=] |
| local writerev = loadstring(wcode)() |
| |
| local t, n = {}, 1 |
| for line in io.lines() do |
| local c = sub(line, 1, 1) |
| if c == ">" then writerev(t, n); io.write(line, "\n"); n = 1 |
| elseif c ~= ";" then t[n] = line; n = n + 1 end |
| end |
| writerev(t, n) |
