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-rw-r--r--util/json.lua37
1 files changed, 36 insertions, 1 deletions
diff --git a/util/json.lua b/util/json.lua
index abb87eab..ff7351a7 100644
--- a/util/json.lua
+++ b/util/json.lua
@@ -1,3 +1,12 @@
+-- Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
+--
+-- utf8char copyright (C) 2007 Rici Lake
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
local type = type;
local t_insert, t_concat, t_remove, t_sort = table.insert, table.concat, table.remove, table.sort;
@@ -29,6 +38,32 @@ for i=0,31 do
if not escapes[ch] then escapes[ch] = ("\\u%.4X"):format(i); end
end
+local function utf8char(i)
+ if i >= 0 then
+ i = i - i%1
+ if i < 128 then
+ return s_char(i)
+ else
+ local c1 = i % 64
+ i = (i - c1) / 64
+ if i < 32 then
+ return s_char(0xC0+i, 0x80+c1)
+ else
+ local c2 = i % 64
+ i = (i - c2) / 64
+ if i < 16 and (i ~= 13 or c2 < 32) then
+ return s_char(0xE0+i, 0x80+c2, 0x80+c1)
+ elseif i >= 16 and i < 0x110 then
+ local c3 = i % 64
+ i = (i - c3) / 64
+ return s_char(0xF0+i, 0x80+c3, 0x80+c2, 0x80+c1)
+ end
+ end
+ end
+ end
+end
+
+
local valid_types = {
number = true,
string = true,
@@ -249,7 +284,7 @@ function json.decode(json)
if not ch:match("[0-9a-fA-F]") then error("invalid unicode escape sequence in string"); end
seq = seq..ch;
end
- s = s..s.char(tonumber(seq, 16)); -- FIXME do proper utf-8
+ s = s..utf8char(tonumber(seq, 16));
next();
else error("invalid escape sequence in string"); end
end