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util.json: Optimize long string parsing.

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This commit is contained in:
Waqas Hussain 2013-05-05 15:02:33 -04:00
parent f10d012d24
commit 8098be4eb1
1 changed files with 5 additions and 5 deletions
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10
util/json.lua
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@ -258,16 +258,16 @@ function json.decode(json)
return val;
end
local function readstring()
local s = "";
local s = {};
checkandskip("\"");
while ch do
while ch and ch ~= "\\" and ch ~= "\"" do
s = s..ch; next();
t_insert(s, ch); next();
end
if ch == "\\" then
next();
if unescapes[ch] then
s = s..unescapes[ch];
t_insert(s, unescapes[ch]);
next();
elseif ch == "u" then
local seq = "";
@ -277,13 +277,13 @@ 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..codepoint_to_utf8(tonumber(seq, 16));
t_insert(s, codepoint_to_utf8(tonumber(seq, 16)));
next();
else error("invalid escape sequence in string"); end
end
if ch == "\"" then
next();
return s;
return t_concat(s);
end
end
error("eof while reading string");