prosody
ec03f6968fa8
tools/serialize.lua

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tools/serialize.lua @ 540:ec03f6968fa8

Added function add_feature to modules API (for adding disco features)
author Waqas Hussain <waqas20@gmail.com>
date Thu, 04 Dec 2008 20:07:22 +0500
parent 519:cccd610a0ef9
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519
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM v0.1
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2 -- Copyright (C) 2008 Matthew Wild
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3 -- Copyright (C) 2008 Waqas Hussain
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4 --
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5 -- This program is free software; you can redistribute it and/or
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6 -- modify it under the terms of the GNU General Public License
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7 -- as published by the Free Software Foundation; either version 2
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8 -- of the License, or (at your option) any later version.
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9 --
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10 -- This program is distributed in the hope that it will be useful,
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11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 -- GNU General Public License for more details.
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14 --
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15 -- You should have received a copy of the GNU General Public License
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16 -- along with this program; if not, write to the Free Software
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17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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18 --
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19
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20
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21
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22 local indent = function(i)
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23 return string.rep("\t", i);
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24 end
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25 local function basicSerialize (o)
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26 if type(o) == "number" or type(o) == "boolean" then
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27 return tostring(o);
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28 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
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29 return (string.format("%q", tostring(o)):gsub("\\\n", "\\n"));
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30 end
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31 end
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32 local function _simplesave (o, ind, t)
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33 if type(o) == "number" then
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34 table.insert(t, tostring(o));
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35 elseif type(o) == "string" then
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36 table.insert(t, (string.format("%q", o):gsub("\\\n", "\\n")));
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37 elseif type(o) == "table" then
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38 table.insert(t, "{\n");
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39 for k,v in pairs(o) do
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40 table.insert(t, indent(ind));
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41 table.insert(t, "[");
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42 table.insert(t, basicSerialize(k));
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43 table.insert(t, "] = ");
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44 _simplesave(v, ind+1, t);
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45 table.insert(t, ",\n");
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46 end
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47 table.insert(t, indent(ind-1));
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48 table.insert(t, "}");
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49 elseif type(o) == "boolean" then
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50 table.insert(t, (o and "true" or "false"));
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51 else
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52 error("cannot serialize a " .. type(o))
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53 end
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54 end
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55 local t_concat = table.concat;
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56
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57 module "serialize"
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58
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59 function serialize(o)
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60 local t = {};
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61 _simplesave(o, 1, t);
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62 return t_concat(t);
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63 end
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64
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65 return _M;