Mercurial > lxmppd-hg-xmllex / file comparison
comparison: util/serialization.lua
util/serialization.lua
- changeset 546
- 1e65f64dfabf
- child 615
- 4ae3e81513f3
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| 542:c9dbfcf21846 | 546:1e65f64dfabf |
|---|---|
| 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; |
