108 lines
2.6 KiB
Lua
108 lines
2.6 KiB
Lua
if not get_hash then
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get_hash = function(s,p)
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if not s then return end
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local h = 0; local n = string.len(s);local m = 4; -- put 4 characters together
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local r = 0;local i = 0;
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while i<n do
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i=i+1;r = 256*r+ string.byte(s,i);
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if i%m == 0 then h=h+(r%p) r=0 end
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end
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if i%m~=0 then h=h+(r%p) end
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return h%p
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end
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hashdb = {}; --array with entries: [hash] = list of possible hits
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insert = function(key,value)
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local hash = get_hash(key,10011);
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local data = hashdb[hash]; if data == nil then hashdb[hash] = {}; data = hashdb[hash] end
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data[#data+1]={key,value};
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return hash
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end
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lookup = function(key)
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local hash = get_hash(key,10011);
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if not hash then return end
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local data = hashdb[hash];
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if not data then return nil end
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for i = 1,#data do
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if data[i][1]==key then return data[i][2] end
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end
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return nil
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end
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analyse = function()
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local count = 0; local maxlen = 0; local maxidx = 1; local n = #hashdb;
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for i = 1, 10000 do
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local data = hashdb[i];
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if data then
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local length = #data;
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if length > maxlen then maxlen = length; maxidx = i end
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count = count + 1
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end
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end
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if maxlen>0 then
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local data = hashdb[maxidx];
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say("number of used hash entries is " .. count .. ", average " .. (step/count) .. " entries per hash, "..
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" max length of list is " .. maxlen .. " at hash ".. maxidx )--.. " : " ..
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--string.gsub(_G.dump(data),"\n","") )
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end
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end
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-- LOAD DICTIONARY WORDS into hashtable
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lang = "german"
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fname = "F:\\games\\rpg\\minetest-0415server\\mods\\basic_translate\\"..lang;
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local f = _G.assert(_G.io.open(fname, "r"));local dicts = f:read("*all");f:close()
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step = 0; maxwords = 10000;
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i=0
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dict = {}; -- for comparison
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while(step<maxwords) do
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step=step+1
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i1 = string.find(dicts,"\t",i+1)
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i2 = string.find(dicts,"\n",i+1)
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if not i2 then break end
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local word = string.sub(dicts, i+1,i1-1);
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local tword = string.sub(dicts, i1+1,i2-1);
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insert(word, tword) -- load into hashtable
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dict[word]=tword
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i=i2
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end
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self.listen(1)
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self.spam(1)
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say(step .. " words loaded")
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end
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-- handle chat event
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speaker,msg = self.listen_msg()
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if msg then
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if msg == "?*" then
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local n = 1000000; local msg = "hello"
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local ret = "";
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local t1 = os.clock();
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for i = 1, n do ret = lookup(msg) end; t1 = os.clock()-t1;
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local t2 = os.clock();
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for i = 1, n do ret = dict[msg] end
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t2 = os.clock()-t2;
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say(t1 .. " " .. t2)
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elseif msg == "??" then
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analyse()
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elseif string.sub(msg,1,1)=="?" then
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msg = string.sub(msg,2);
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local ret = lookup(msg);
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if ret then say("found entry for " .. msg .. " : " .. ret) else say("entry not found") end
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end
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end |