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util/serialization.lua @ 3521:896ffec79f57
Merge hoelzro->trunk
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 15 Oct 2010 18:40:37 +0100 |
parent | 2923:b7049746bd29 |
child | 3736:73399dd525e8 |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 Waqas Hussain |
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4 -- |
758 | 5 -- This project is MIT/X11 licensed. Please see the |
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 local next = next; |
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17 |
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18 local debug_traceback = debug.traceback; |
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19 local log = require "util.logger".init("serialization"); |
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20 module "serialization" |
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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 (("%q"):format(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, func) |
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33 if type(o) == "number" then |
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34 func(t, tostring(o)); |
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35 elseif type(o) == "string" then |
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36 func(t, (("%q"):format(o):gsub("\\\n", "\\n"))); |
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37 elseif type(o) == "table" then |
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38 if next(o) ~= nil then |
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39 func(t, "{\n"); |
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40 for k,v in pairs(o) do |
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41 func(t, indent(ind)); |
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42 func(t, "["); |
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43 func(t, basicSerialize(k)); |
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44 func(t, "] = "); |
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45 if ind == 0 then |
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46 _simplesave(v, 0, t, func); |
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47 else |
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48 _simplesave(v, ind+1, t, func); |
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49 end |
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50 func(t, ";\n"); |
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51 end |
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52 func(t, indent(ind-1)); |
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53 func(t, "}"); |
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54 else |
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55 func(t, "{}"); |
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56 end |
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57 elseif type(o) == "boolean" then |
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58 func(t, (o and "true" or "false")); |
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59 else |
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60 log("error", "cannot serialize a %s: %s", type(o), debug_traceback()) |
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61 func(t, "nil"); |
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62 end |
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63 end |
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64 |
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65 function append(t, o) |
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66 _simplesave(o, 1, t, t.write or t_insert); |
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67 return t; |
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68 end |
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69 |
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70 function serialize(o) |
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71 return t_concat(append({}, o)); |
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72 end |
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73 |
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74 function deserialize(str) |
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75 error("Not implemented"); |
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76 end |
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77 |
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78 return _M; |