comparison: serialization.lua
serialization.lua
- changeset 0
- 11a0cbd6c216
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| -1:000000000000 | 0:11a0cbd6c216 |
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| 1 -- Prosody IM v0.4 | |
| 2 -- Copyright (C) 2008-2009 Matthew Wild | |
| 3 -- Copyright (C) 2008-2009 Waqas Hussain | |
| 4 -- | |
| 5 -- This project is MIT/X11 licensed. Please see the | |
| 6 -- COPYING file in the source package for more information. | |
| 7 -- | |
| 8 | |
| 9 local string_rep = string.rep; | |
| 10 local type = type; | |
| 11 local tostring = tostring; | |
| 12 local t_insert = table.insert; | |
| 13 local t_concat = table.concat; | |
| 14 local error = error; | |
| 15 local pairs = pairs; | |
| 16 | |
| 17 module "serialization" | |
| 18 | |
| 19 local indent = function(i) | |
| 20 return string_rep("\t", i); | |
| 21 end | |
| 22 local function basicSerialize (o) | |
| 23 if type(o) == "number" or type(o) == "boolean" then | |
| 24 return tostring(o); | |
| 25 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise. | |
| 26 return (("%q"):format(tostring(o)):gsub("\\\n", "\\n")); | |
| 27 end | |
| 28 end | |
| 29 local function _simplesave(o, ind, t, func) | |
| 30 if type(o) == "number" then | |
| 31 func(t, tostring(o)); | |
| 32 elseif type(o) == "string" then | |
| 33 func(t, (("%q"):format(o):gsub("\\\n", "\\n"))); | |
| 34 elseif type(o) == "table" then | |
| 35 func(t, "{\n"); | |
| 36 for k,v in pairs(o) do | |
| 37 func(t, indent(ind)); | |
| 38 func(t, "["); | |
| 39 func(t, basicSerialize(k)); | |
| 40 func(t, "] = "); | |
| 41 if ind == 0 then | |
| 42 _simplesave(v, 0, t, func); | |
| 43 else | |
| 44 _simplesave(v, ind+1, t, func); | |
| 45 end | |
| 46 func(t, ",\n"); | |
| 47 end | |
| 48 func(t, indent(ind-1)); | |
| 49 func(t, "}"); | |
| 50 elseif type(o) == "boolean" then | |
| 51 func(t, (o and "true" or "false")); | |
| 52 else | |
| 53 error("cannot serialize a " .. type(o)) | |
| 54 end | |
| 55 end | |
| 56 | |
| 57 function append(t, o) | |
| 58 _simplesave(o, 1, t, t.write or t_insert); | |
| 59 return t; | |
| 60 end | |
| 61 | |
| 62 function serialize(o) | |
| 63 return t_concat(append({}, o)); | |
| 64 end | |
| 65 | |
| 66 function deserialize(str) | |
| 67 error("Not implemented"); | |
| 68 end | |
| 69 | |
| 70 return _M; |
