prosody
b1885732e979
util/serialization.lua

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util/serialization.lua @ 758:b1885732e979

GPL->MIT!
author Matthew Wild <mwild1@gmail.com>
date Fri, 30 Jan 2009 17:22:56 +0000
parent 615:4ae3e81513f3
child 759:5cccfb5da6cb
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615
4ae3e81513f3 0.1 -> 0.2
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1 -- Prosody IM v0.2
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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 --
758
b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local string_rep = string.rep;
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10 local type = type;
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11 local tostring = tostring;
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12 local t_insert = table.insert;
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13 local t_concat = table.concat;
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14 local error = error;
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15 local pairs = pairs;
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16
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17 module "serialization"
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18
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19 local indent = function(i)
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20 return string_rep("\t", i);
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21 end
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22 local function basicSerialize (o)
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23 if type(o) == "number" or type(o) == "boolean" then
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24 return tostring(o);
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25 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
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26 return (("%q"):format(tostring(o)):gsub("\\\n", "\\n"));
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27 end
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28 end
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29 local function _simplesave(o, ind, t, func)
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30 if type(o) == "number" then
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31 func(t, tostring(o));
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32 elseif type(o) == "string" then
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33 func(t, (("%q"):format(o):gsub("\\\n", "\\n")));
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34 elseif type(o) == "table" then
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35 func(t, "{\n");
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36 for k,v in pairs(o) do
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37 func(t, indent(ind));
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38 func(t, "[");
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39 func(t, basicSerialize(k));
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40 func(t, "] = ");
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41 if ind == 0 then
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42 _simplesave(v, 0, t, func);
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43 else
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44 _simplesave(v, ind+1, t, func);
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45 end
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46 func(t, ",\n");
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47 end
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48 func(t, indent(ind-1));
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49 func(t, "}");
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50 elseif type(o) == "boolean" then
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51 func(t, (o and "true" or "false"));
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52 else
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53 error("cannot serialize a " .. type(o))
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54 end
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55 end
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56
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57 function append(t, o)
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58 _simplesave(o, 1, t, t.write or t_insert);
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59 return t;
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60 end
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61
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62 function serialize(o)
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63 return t_concat(append({}, o));
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64 end
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65
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66 function deserialize(str)
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67 error("Not implemented");
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68 end
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69
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70 return _M;