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local u = {}
local nonames = {"if", "for", "end", "do", "local", "then", "else", "elseif", "return", "goto", "function", "nil", "false", "true", "repeat", "return", "break", "and", "or", "not", "in", "repeat", "until", "while", "continue"}
u.uglify = function(str)
assert(str ~= nil, "Cannot uglify a nil string")
assert(type(str) == "string", "Can only uglify strings")
local avalchars = {}
local capture_chars = {"%", "(", "[", "\13"}
local skipchars = {}
for k, v in pairs(capture_chars) do
skipchars[string.byte(v, 1)] = true
end
for k = 1, 128 do
if not skipchars[k] then
if string.find(str, string.char(k)) then
avalchars[k] = false
else
avalchars[k] = true
end
end
end
for k, v in pairs(skipchars) do
avalchars[k] = false
end
local counts = {}
for k, v in ipairs(nonames) do
counts[v] = 0
end
for k,_ in pairs(counts) do
for i,j in string.gmatch(str,k) do
counts[k] = counts[k] + 1
end
end
local prettifycode = [[
local function p(s) local r = {%s} for k,v in pairs(r) do s = s:gsub(v[2],v[1]) end return s end]]
local replacementtbl = {}
local cursor = 1 --Start at 1 because 0 is the null character
for k, v in ipairs(nonames) do
if counts[v] ~= 0 then
while not avalchars[cursor] do
cursor = cursor + 1
end
replacementtbl[v] = cursor
avalchars[cursor] = false
end
end
assert(cursor < 128, "Unable to uglify file, not enough unused characters!")
local replacementstr = {}
for k, v in pairs(replacementtbl) do
local trs = string.format("{%q,%q}", k, string.char(v))
replacementstr[#replacementstr + 1] = trs
end
local frepstr = table.concat(replacementstr, ",")
local pcd = string.format(prettifycode, frepstr)
for k, v in pairs(replacementtbl) do
str = str:gsub(k, string.char(v))
end
local numdeepcom = 1
local uglified = table.concat({pcd, "\n", "return assert(loadstring(p([", string.rep("=", numdeepcom), "[", str, "]", string.rep("=", numdeepcom), "])))()"})
return uglified
end
--prettifycode = string.format(prettifycode,)
return u
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