prosody
ec8184b32f60
util/serialization.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/serialization.lua @ 4080:ec8184b32f60

ejabberd_init.lib.lua: Remove now needless library
author Matthew Wild <mwild1@gmail.com>
date Fri, 07 Jan 2011 03:16:39 +0000
parent 3865:c6af5de97b37
child 5021:85b2689dbcfe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1523
841d61be198f Remove version number from copyright headers
Matthew Wild <mwild1@gmail.com>
parents: 1135
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 2222
diff changeset
2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 2222
diff changeset
3 -- Copyright (C) 2008-2010 Waqas Hussain
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
4 --
758
b1885732e979 GPL->MIT!
Matthew Wild <mwild1@gmail.com>
parents: 615
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
b1885732e979 GPL->MIT!
Matthew Wild <mwild1@gmail.com>
parents: 615
diff changeset
6 -- COPYING file in the source package for more information.
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
7 --
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
8
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
9 local string_rep = string.rep;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
10 local type = type;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
11 local tostring = tostring;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
12 local t_insert = table.insert;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
13 local t_concat = table.concat;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
14 local error = error;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
15 local pairs = pairs;
2148
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
16 local next = next;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
17
3856
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
18 local loadstring = loadstring;
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
19 local setfenv = setfenv;
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
20 local pcall = pcall;
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
21
1107
ebda1845ebc1 util.serialization: Log a warning when trying to serialize something we can't
Matthew Wild <mwild1@gmail.com>
parents: 896
diff changeset
22 local debug_traceback = debug.traceback;
ebda1845ebc1 util.serialization: Log a warning when trying to serialize something we can't
Matthew Wild <mwild1@gmail.com>
parents: 896
diff changeset
23 local log = require "util.logger".init("serialization");
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
24 module "serialization"
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
25
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
26 local indent = function(i)
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
27 return string_rep("\t", i);
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
28 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
29 local function basicSerialize (o)
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
30 if type(o) == "number" or type(o) == "boolean" then
3865
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
31 -- no need to check for NaN, as that's not a valid table index
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
32 if o == 1/0 then return "(1/0)";
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
33 elseif o == -1/0 then return "(-1/0)";
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
34 else return tostring(o); end
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
35 else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
36 return (("%q"):format(tostring(o)):gsub("\\\n", "\\n"));
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
37 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
38 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
39 local function _simplesave(o, ind, t, func)
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
40 if type(o) == "number" then
3865
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
41 if o ~= o then func(t, "(0/0)");
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
42 elseif o == 1/0 then func(t, "(1/0)");
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
43 elseif o == -1/0 then func(t, "(-1/0)");
c6af5de97b37 util.serialization: Proper serialization of Infinity, -Infinity and NaN.
Waqas Hussain <waqas20@gmail.com>
parents: 3856
diff changeset
44 else func(t, tostring(o)); end
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
45 elseif type(o) == "string" then
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
46 func(t, (("%q"):format(o):gsub("\\\n", "\\n")));
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
47 elseif type(o) == "table" then
2222
81b4e738e4d3 util.serialization: Correctly serialize tables with 'false' as a key, fixes an issue with rosters not saving (thanks mathias, Tobias)
Matthew Wild <mwild1@gmail.com>
parents: 2149
diff changeset
48 if next(o) ~= nil then
2148
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
49 func(t, "{\n");
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
50 for k,v in pairs(o) do
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
51 func(t, indent(ind));
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
52 func(t, "[");
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
53 func(t, basicSerialize(k));
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
54 func(t, "] = ");
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
55 if ind == 0 then
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
56 _simplesave(v, 0, t, func);
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
57 else
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
58 _simplesave(v, ind+1, t, func);
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
59 end
2149
603134825bdb util.serialization: Replaced commas with semi-colons between table fields.
Waqas Hussain <waqas20@gmail.com>
parents: 2148
diff changeset
60 func(t, ";\n");
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
61 end
2148
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
62 func(t, indent(ind-1));
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
63 func(t, "}");
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
64 else
5590c13552ab util.serialization: Concise output for empty tables.
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
65 func(t, "{}");
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
66 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
67 elseif type(o) == "boolean" then
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
68 func(t, (o and "true" or "false"));
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
69 else
1128
b2e548344d61 util.serialization: Write nil for non-serializable data types, and bump the log level to 'error'
Matthew Wild <mwild1@gmail.com>
parents: 1107
diff changeset
70 log("error", "cannot serialize a %s: %s", type(o), debug_traceback())
1135
355f9487ab38 util/serialization: Fixed serialization formatting
Waqas Hussain <waqas20@gmail.com>
parents: 1128
diff changeset
71 func(t, "nil");
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
72 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
73 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
74
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
75 function append(t, o)
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
76 _simplesave(o, 1, t, t.write or t_insert);
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
77 return t;
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
78 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
79
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
80 function serialize(o)
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
81 return t_concat(append({}, o));
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
82 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
83
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
84 function deserialize(str)
3856
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
85 if type(str) ~= "string" then return nil; end
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
86 str = "return "..str;
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
87 local f, err = loadstring(str, "@data");
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
88 if not f then return nil, err; end
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
89 setfenv(f, {});
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
90 local success, ret = pcall(f);
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
91 if not success then return nil, ret; end
2cb50432bc9a util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
92 return ret;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
93 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
94
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
95 return _M;