Module:Base64: Difference between revisions
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yesno(encode, false) |
yesno(encode, false) |
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return "Sorry, I gave up that time" |
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function enc(data) |
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return ((data:gsub('.', function(x) |
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local r,b='',x:byte() |
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for i=8,1,-1 do r=r..(b%2^i-b%2^(i-1)>0 and '1' or '0') end |
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return r; |
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end)..'0000'):gsub('%d%d%d?%d?%d?%d?', function(x) |
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if (#x < 6) then return '' end |
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local c=0 |
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for i=1,6 do c=c+(x:sub(i,i)=='1' and 2^(6-i) or 0) end |
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return b:sub(c+1,c+1) |
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end)..({ '', '==', '=' })[#data%3+1]) |
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end |
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-- decoding |
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function dec(data) |
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data = string.gsub(data, '[^'..b..'=]', '') |
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return (data:gsub('.', function(x) |
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if (x == '=') then return '' end |
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local r,f='',(b:find(x)-1) |
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for i=6,1,-1 do r=r..(f%2^i-f%2^(i-1)>0 and '1' or '0') end |
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return r; |
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end):gsub('%d%d%d?%d?%d?%d?%d?%d?', function(x) |
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if (#x ~= 8) then return '' end |
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local c=0 |
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for i=1,8 do c=c+(x:sub(i,i)=='1' and 2^(7-i) or 0) end |
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return string.char(c) |
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end)) |
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end |
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if (encode == true) then |
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enc(data) |
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else |
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dec(data) |
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end |
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end |
end |
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Latest revision as of 15:48, 14 January 2021
Documentation for this module may be created at Module:Base64/doc
-- Made by [[User:Celeste]] - Licensed under GPLv3
local p = {}
local yesno = require('Module:Yesno') -- invoke Yesno
local b='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/' -- You will need this for encoding/decoding
function p.base64(frame)
local args
local data
local encode
if frame == mw.getCurrentFrame() then
args = frame.args
else
args = frame
end
data = frame.args.data
encode = frame.args.encode
yesno(encode, false)
return "Sorry, I gave up that time"
end
return p