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-rw-r--r--util/serialization.lua81
1 files changed, 81 insertions, 0 deletions
diff --git a/util/serialization.lua b/util/serialization.lua
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+-- Prosody IM v0.1
+-- Copyright (C) 2008 Matthew Wild
+-- Copyright (C) 2008 Waqas Hussain
+--
+-- This program is free software; you can redistribute it and/or
+-- modify it under the terms of the GNU General Public License
+-- as published by the Free Software Foundation; either version 2
+-- of the License, or (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+--
+
+local string_rep = string.rep;
+local type = type;
+local tostring = tostring;
+local t_insert = table.insert;
+local t_concat = table.concat;
+local error = error;
+local pairs = pairs;
+
+module "serialization"
+
+local indent = function(i)
+ return string_rep("\t", i);
+end
+local function basicSerialize (o)
+ if type(o) == "number" or type(o) == "boolean" then
+ return tostring(o);
+ else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise.
+ return (("%q"):format(tostring(o)):gsub("\\\n", "\\n"));
+ end
+end
+local function _simplesave(o, ind, t, func)
+ if type(o) == "number" then
+ func(t, tostring(o));
+ elseif type(o) == "string" then
+ func(t, (("%q"):format(o):gsub("\\\n", "\\n")));
+ elseif type(o) == "table" then
+ func(t, "{\n");
+ for k,v in pairs(o) do
+ func(t, indent(ind));
+ func(t, "[");
+ func(t, basicSerialize(k));
+ func(t, "] = ");
+ if ind == 0 then
+ _simplesave(v, 0, t, func);
+ else
+ _simplesave(v, ind+1, t, func);
+ end
+ func(t, ",\n");
+ end
+ func(t, indent(ind-1));
+ func(t, "}");
+ elseif type(o) == "boolean" then
+ func(t, (o and "true" or "false"));
+ else
+ error("cannot serialize a " .. type(o))
+ end
+end
+
+function append(t, o)
+ _simplesave(o, 1, t, t.write or t_insert);
+ return t;
+end
+
+function serialize(o)
+ return t_concat(append({}, o));
+end
+
+function deserialize(str)
+ error("Not implemented");
+end
+
+return _M;