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now move nselib to recover history
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@@ -1,84 +0,0 @@
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-- license = "See nmaps COPYING for license"
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module("strbuf" ,package.seeall)
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-- String buffer functions. Concatenation is not efficient in
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-- lua as strings are immutable. If a large amount of '..'
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-- operations are needed a string buffer should be used instead
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--[[
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local buf = strbuf.new()
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-- from here buf may be used like a string for concatenation operations
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-- (the lefthand-operand has to be a strbuf, the righthand-operand may be
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-- a string or a strbuf)
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-- alternativly you can assign a value (which will become the first string
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-- inside the buffer) with new
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local buf2 = strbuf.new('hello')
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buf = buf .. 'string'
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buf = buf .. 'data'
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print(buf) -- default seperator is a new line
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print(strbuf.dump(buf)) -- no seperator
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print(strbuf.dump(buf, ' ')) -- seperated by spaces
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strbuf.clear(buf)
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--]]
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dump = table.concat
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concatbuf =function(sbuf, s)
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if sbuf == s then
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error("refusing to concat the same buffer (recursion)!")
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end
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if getmetatable(sbuf) ~= mt then
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error("left-hand operand of the concat operation has to be a strbuf!")
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end
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if type(s)=="string" then
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table.insert(sbuf, s)
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elseif getmetatable(s) == mt then
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for _,v in ipairs(s) do
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table.insert(sbuf, v)
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end
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else
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error("right-hand operand of concat has to be either string or strbuf!")
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end
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return sbuf
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end
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local eqbuf = function(sbuf1, sbuf2)
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if getmetatable(sbuf1) ~= mt then
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error("equal function expects a value of type strbuf as left-hand operand")
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end
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if getmetatable(sbuf1) ~= getmetatable(sbuf2) then
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return false
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end
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if #sbuf1 ~= #sbuf2 then
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return false
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end
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for i=1, #sbuf1 do
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if sbuf1[i] ~= sbuf2[i] then
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return false
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end
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end
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return true
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end
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clear = function(sbuf)
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for i, v in pairs(sbuf) do
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sbuf[i] = nil
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end
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end
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mt = { __concat = concatbuf, __tostring = function(s) return dump(s, '\n') end , __eq=eqbuf}
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new = function(val)
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local tmp ={}
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setmetatable(tmp, mt)
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if val ~=nil then
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table.insert(tmp, val)
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end
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return tmp
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end
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