prosody
76f46c2579a2
tools/migration/migrator/mtools.lua

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tools/migration/migrator/mtools.lua @ 11106:76f46c2579a2 0.11

net.websocket.frames: Allow all methods to work on non-string objects Instead of using the string library, use methods from the passed object, which are assumed to be equivalent. This provides compatibility with objects from util.ringbuffer and util.dbuffer, for example.
author Matthew Wild <mwild1@gmail.com>
date Thu, 17 Sep 2020 13:00:19 +0100
parent 7881:4e3067272fae
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2
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3 local print = print;
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4 local t_insert = table.insert;
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5 local t_sort = table.sort;
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8 local function sorted(params)
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10 local reader = params.reader; -- iterator to get items from
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11 local sorter = params.sorter; -- sorting function
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12 local filter = params.filter; -- filter function
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14 local cache = {};
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15 for item in reader do
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16 if filter then item = filter(item); end
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17 if item then t_insert(cache, item); end
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18 end
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19 if sorter then
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20 t_sort(cache, sorter);
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21 end
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22 local i = 0;
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23 return function()
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24 i = i + 1;
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25 return cache[i];
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26 end;
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28 end
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29
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30 local function merged(reader, merger)
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32 local item1 = reader();
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33 local merged = { item1 };
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34 return function()
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35 while true do
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36 if not item1 then return nil; end
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37 local item2 = reader();
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38 if not item2 then item1 = nil; return merged; end
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39 if merger(item1, item2) then
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40 --print("merged")
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41 item1 = item2;
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42 t_insert(merged, item1);
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43 else
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44 --print("unmerged", merged)
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45 item1 = item2;
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46 local tmp = merged;
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47 merged = { item1 };
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48 return tmp;
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49 end
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50 end
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51 end;
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53 end
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55 return {
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56 sorted = sorted;
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57 merged = merged;
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58 }