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util/serialization.lua @ 546:1e65f64dfabf
Added module util.serialization
author | Waqas Hussain <waqas20@gmail.com> |
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date | Thu, 04 Dec 2008 23:27:54 +0500 |
child | 615:4ae3e81513f3 |
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542:c9dbfcf21846 | 546:1e65f64dfabf |
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1 -- Prosody IM v0.1 | |
2 -- Copyright (C) 2008 Matthew Wild | |
3 -- Copyright (C) 2008 Waqas Hussain | |
4 -- | |
5 -- This program is free software; you can redistribute it and/or | |
6 -- modify it under the terms of the GNU General Public License | |
7 -- as published by the Free Software Foundation; either version 2 | |
8 -- of the License, or (at your option) any later version. | |
9 -- | |
10 -- This program is distributed in the hope that it will be useful, | |
11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 -- GNU General Public License for more details. | |
14 -- | |
15 -- You should have received a copy of the GNU General Public License | |
16 -- along with this program; if not, write to the Free Software | |
17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
18 -- | |
19 | |
20 local string_rep = string.rep; | |
21 local type = type; | |
22 local tostring = tostring; | |
23 local t_insert = table.insert; | |
24 local t_concat = table.concat; | |
25 local error = error; | |
26 local pairs = pairs; | |
27 | |
28 module "serialization" | |
29 | |
30 local indent = function(i) | |
31 return string_rep("\t", i); | |
32 end | |
33 local function basicSerialize (o) | |
34 if type(o) == "number" or type(o) == "boolean" then | |
35 return tostring(o); | |
36 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise. | |
37 return (("%q"):format(tostring(o)):gsub("\\\n", "\\n")); | |
38 end | |
39 end | |
40 local function _simplesave(o, ind, t, func) | |
41 if type(o) == "number" then | |
42 func(t, tostring(o)); | |
43 elseif type(o) == "string" then | |
44 func(t, (("%q"):format(o):gsub("\\\n", "\\n"))); | |
45 elseif type(o) == "table" then | |
46 func(t, "{\n"); | |
47 for k,v in pairs(o) do | |
48 func(t, indent(ind)); | |
49 func(t, "["); | |
50 func(t, basicSerialize(k)); | |
51 func(t, "] = "); | |
52 if ind == 0 then | |
53 _simplesave(v, 0, t, func); | |
54 else | |
55 _simplesave(v, ind+1, t, func); | |
56 end | |
57 func(t, ",\n"); | |
58 end | |
59 func(t, indent(ind-1)); | |
60 func(t, "}"); | |
61 elseif type(o) == "boolean" then | |
62 func(t, (o and "true" or "false")); | |
63 else | |
64 error("cannot serialize a " .. type(o)) | |
65 end | |
66 end | |
67 | |
68 function append(t, o) | |
69 _simplesave(o, 1, t, t.write or t_insert); | |
70 return t; | |
71 end | |
72 | |
73 function serialize(o) | |
74 return t_concat(append({}, o)); | |
75 end | |
76 | |
77 function deserialize(str) | |
78 error("Not implemented"); | |
79 end | |
80 | |
81 return _M; |