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util/json.lua @ 8697:c60fdf148118

util.json: Unescape surrogate pairs

author	Matthew Wild <mwild1@gmail.com>
date	Tue, 27 Mar 2018 13:44:40 +0100
parent	8382:e5d00bf4a4d5
child	9329:19bc3ec13f07

rev	line source
5436 a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	1 -- Prosody IM
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	2 -- Copyright (C) 2008-2010 Matthew Wild
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	3 -- Copyright (C) 2008-2010 Waqas Hussain
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	4 --
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	5 -- This project is MIT/X11 licensed. Please see the
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	6 -- COPYING file in the source package for more information.
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	7 --
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	8
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	9 local type = type;
4474 b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	10 local t_insert, t_concat, t_remove, t_sort = table.insert, table.concat, table.remove, table.sort;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	11 local s_char = string.char;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	12 local tostring, tonumber = tostring, tonumber;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	13 local pairs, ipairs = pairs, ipairs;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	14 local next = next;
6785 bf1f09a5bcf7 util.json: Remove use of newproxy Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	15 local getmetatable, setmetatable = getmetatable, setmetatable;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	16 local print = print;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	17
5516 9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	18 local has_array, array = pcall(require, "util.array");
5562 a6b8fb827e2a util.json: Fix variable name typo which broke util.json when util.array was missing. Waqas Hussain <waqas20@gmail.com> parents: 5561 diff changeset	19 local array_mt = has_array and getmetatable(array()) or {};
5516 9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	20
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	21 --module("json")
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	22 local module = {};
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	23
6785 bf1f09a5bcf7 util.json: Remove use of newproxy Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	24 local null = setmetatable({}, { __tostring = function() return "null"; end; });
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	25 module.null = null;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	26
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	27 local escapes = {
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	28 ["\""] = "\\\"", ["\\"] = "\\\\", ["\b"] = "\\b",
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	29 ["\f"] = "\\f", ["\n"] = "\\n", ["\r"] = "\\r", ["\t"] = "\\t"};
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	30 for i=0,31 do
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	31 local ch = s_char(i);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	32 if not escapes[ch] then escapes[ch] = ("\\u%.4X"):format(i); end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	33 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	34
5517 9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	35 local function codepoint_to_utf8(code)
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	36 if code < 0x80 then return s_char(code); end
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	37 local bits0_6 = code % 64;
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	38 if code < 0x800 then
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	39 local bits6_5 = (code - bits0_6) / 64;
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	40 return s_char(0x80 + 0x40 + bits6_5, 0x80 + bits0_6);
5436 a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	41 end
5517 9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	42 local bits0_12 = code % 4096;
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	43 local bits6_6 = (bits0_12 - bits0_6) / 64;
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	44 local bits12_4 = (code - bits0_12) / 4096;
9d7349bbe4d2 util.json: New, improved, fixed codepoint to UTF-8 conversion. Waqas Hussain <waqas20@gmail.com> parents: 5516 diff changeset	45 return s_char(0x80 + 0x40 + 0x20 + bits12_4, 0x80 + bits6_6, 0x80 + bits0_6);
5436 a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	46 end
a4ba5819bf50 util.json: Convert \uXXXX to UTF-8 when decoding Matthew Wild <mwild1@gmail.com> parents: 5395 diff changeset	47
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	48 local valid_types = {
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	49 number = true,
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	50 string = true,
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	51 table = true,
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	52 boolean = true
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	53 };
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	54 local special_keys = {
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	55 __array = true;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	56 __hash = true;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	57 };
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	58
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	59 local simplesave, tablesave, arraysave, stringsave;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	60
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	61 function stringsave(o, buffer)
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	62 -- FIXME do proper utf-8 and binary data detection
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	63 t_insert(buffer, "\""..(o:gsub(".", escapes)).."\"");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	64 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	65
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	66 function arraysave(o, buffer)
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	67 t_insert(buffer, "[");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	68 if next(o) then
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	69 for _, v in ipairs(o) do
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	70 simplesave(v, buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	71 t_insert(buffer, ",");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	72 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	73 t_remove(buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	74 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	75 t_insert(buffer, "]");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	76 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	77
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	78 function tablesave(o, buffer)
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	79 local __array = {};
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	80 local __hash = {};
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	81 local hash = {};
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	82 for i,v in ipairs(o) do
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	83 __array[i] = v;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	84 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	85 for k,v in pairs(o) do
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	86 local ktype, vtype = type(k), type(v);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	87 if valid_types[vtype] or v == null then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	88 if ktype == "string" and not special_keys[k] then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	89 hash[k] = v;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	90 elseif (valid_types[ktype] or k == null) and __array[k] == nil then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	91 __hash[k] = v;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	92 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	93 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	94 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	95 if next(__hash) ~= nil or next(hash) ~= nil or next(__array) == nil then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	96 t_insert(buffer, "{");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	97 local mark = #buffer;
4474 b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	98 if buffer.ordered then
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	99 local keys = {};
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	100 for k in pairs(hash) do
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	101 t_insert(keys, k);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	102 end
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	103 t_sort(keys);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	104 for _,k in ipairs(keys) do
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	105 stringsave(k, buffer);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	106 t_insert(buffer, ":");
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	107 simplesave(hash[k], buffer);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	108 t_insert(buffer, ",");
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	109 end
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	110 else
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	111 for k,v in pairs(hash) do
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	112 stringsave(k, buffer);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	113 t_insert(buffer, ":");
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	114 simplesave(v, buffer);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	115 t_insert(buffer, ",");
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	116 end
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	117 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	118 if next(__hash) ~= nil then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	119 t_insert(buffer, "\"__hash\":[");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	120 for k,v in pairs(__hash) do
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	121 simplesave(k, buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	122 t_insert(buffer, ",");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	123 simplesave(v, buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	124 t_insert(buffer, ",");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	125 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	126 t_remove(buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	127 t_insert(buffer, "]");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	128 t_insert(buffer, ",");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	129 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	130 if next(__array) then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	131 t_insert(buffer, "\"__array\":");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	132 arraysave(__array, buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	133 t_insert(buffer, ",");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	134 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	135 if mark ~= #buffer then t_remove(buffer); end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	136 t_insert(buffer, "}");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	137 else
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	138 arraysave(__array, buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	139 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	140 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	141
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	142 function simplesave(o, buffer)
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	143 local t = type(o);
7235 ee1f7e1e548c util.json: Fix encoding of json.null (bug introduced in bf1f09a5bcf7) Matthew Wild <mwild1@gmail.com> parents: 6785 diff changeset	144 if o == null then
ee1f7e1e548c util.json: Fix encoding of json.null (bug introduced in bf1f09a5bcf7) Matthew Wild <mwild1@gmail.com> parents: 6785 diff changeset	145 t_insert(buffer, "null");
ee1f7e1e548c util.json: Fix encoding of json.null (bug introduced in bf1f09a5bcf7) Matthew Wild <mwild1@gmail.com> parents: 6785 diff changeset	146 elseif t == "number" then
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	147 t_insert(buffer, tostring(o));
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	148 elseif t == "string" then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	149 stringsave(o, buffer);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	150 elseif t == "table" then
5516 9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	151 local mt = getmetatable(o);
9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	152 if mt == array_mt then
9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	153 arraysave(o, buffer);
9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	154 else
9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	155 tablesave(o, buffer);
9733836629f9 util.json: Make encode(decode("[]"))=="[]". Waqas Hussain <waqas20@gmail.com> parents: 5436 diff changeset	156 end
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	157 elseif t == "boolean" then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	158 t_insert(buffer, (o and "true" or "false"));
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	159 else
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	160 t_insert(buffer, "null");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	161 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	162 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	163
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	164 function module.encode(obj)
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	165 local t = {};
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	166 simplesave(obj, t);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	167 return t_concat(t);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	168 end
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	169 function module.encode_ordered(obj)
4474 b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	170 local t = { ordered = true };
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	171 simplesave(obj, t);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	172 return t_concat(t);
b08a46cf06e6 util.json: Added function encode_ordered(object). Waqas Hussain <waqas20@gmail.com> parents: 4404 diff changeset	173 end
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	174 function module.encode_array(obj)
5395 ec33d72a08b6 util.json: Add json.encode_array() (thanks B) Matthew Wild <mwild1@gmail.com> parents: 4474 diff changeset	175 local t = {};
ec33d72a08b6 util.json: Add json.encode_array() (thanks B) Matthew Wild <mwild1@gmail.com> parents: 4474 diff changeset	176 arraysave(obj, t);
ec33d72a08b6 util.json: Add json.encode_array() (thanks B) Matthew Wild <mwild1@gmail.com> parents: 4474 diff changeset	177 return t_concat(t);
ec33d72a08b6 util.json: Add json.encode_array() (thanks B) Matthew Wild <mwild1@gmail.com> parents: 4474 diff changeset	178 end
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	179
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	180 -----------------------------------
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	181
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	182
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	183 local function _skip_whitespace(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	184 return json:find("[^ \t\r\n]", index) or index; -- no need to check \r\n, we converted those to \t
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	185 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	186 local function _fixobject(obj)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	187 local __array = obj.__array;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	188 if __array then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	189 obj.__array = nil;
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	190 for _, v in ipairs(__array) do
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	191 t_insert(obj, v);
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	192 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	193 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	194 local __hash = obj.__hash;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	195 if __hash then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	196 obj.__hash = nil;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	197 local k;
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	198 for _, v in ipairs(__hash) do
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	199 if k ~= nil then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	200 obj[k] = v; k = nil;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	201 else
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	202 k = v;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	203 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	204 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	205 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	206 return obj;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	207 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	208 local _readvalue, _readstring;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	209 local function _readobject(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	210 local o = {};
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	211 while true do
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	212 local key, val;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	213 index = _skip_whitespace(json, index + 1);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	214 if json:byte(index) ~= 0x22 then -- "\""
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	215 if json:byte(index) == 0x7d then return o, index + 1; end -- "}"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	216 return nil, "key expected";
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	217 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	218 key, index = _readstring(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	219 if key == nil then return nil, index; end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	220 index = _skip_whitespace(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	221 if json:byte(index) ~= 0x3a then return nil, "colon expected"; end -- ":"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	222 val, index = _readvalue(json, index + 1);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	223 if val == nil then return nil, index; end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	224 o[key] = val;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	225 index = _skip_whitespace(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	226 local b = json:byte(index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	227 if b == 0x7d then return _fixobject(o), index + 1; end -- "}"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	228 if b ~= 0x2c then return nil, "object eof"; end -- ","
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	229 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	230 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	231 local function _readarray(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	232 local a = {};
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	233 local oindex = index;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	234 while true do
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	235 local val;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	236 val, index = _readvalue(json, index + 1);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	237 if val == nil then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	238 if json:byte(oindex + 1) == 0x5d then return setmetatable(a, array_mt), oindex + 2; end -- "]"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	239 return val, index;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	240 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	241 t_insert(a, val);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	242 index = _skip_whitespace(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	243 local b = json:byte(index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	244 if b == 0x5d then return setmetatable(a, array_mt), index + 1; end -- "]"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	245 if b ~= 0x2c then return nil, "array eof"; end -- ","
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	246 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	247 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	248 local _unescape_error;
8697 c60fdf148118 util.json: Unescape surrogate pairs Matthew Wild <mwild1@gmail.com> parents: 8382 diff changeset	249 local function _unescape_surrogate_func(x)
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	250 local lead, trail = tonumber(x:sub(3, 6), 16), tonumber(x:sub(9, 12), 16);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	251 local codepoint = lead * 0x400 + trail - 0x35FDC00;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	252 local a = codepoint % 64;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	253 codepoint = (codepoint - a) / 64;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	254 local b = codepoint % 64;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	255 codepoint = (codepoint - b) / 64;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	256 local c = codepoint % 64;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	257 codepoint = (codepoint - c) / 64;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	258 return s_char(0xF0 + codepoint, 0x80 + c, 0x80 + b, 0x80 + a);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	259 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	260 local function _unescape_func(x)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	261 x = x:match("%x%x%x%x", 3);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	262 if x then
8697 c60fdf148118 util.json: Unescape surrogate pairs Matthew Wild <mwild1@gmail.com> parents: 8382 diff changeset	263 local codepoint = tonumber(x, 16)
c60fdf148118 util.json: Unescape surrogate pairs Matthew Wild <mwild1@gmail.com> parents: 8382 diff changeset	264 if codepoint >= 0xD800 and codepoint <= 0xDFFF then _unescape_error = true; end -- bad surrogate pair
c60fdf148118 util.json: Unescape surrogate pairs Matthew Wild <mwild1@gmail.com> parents: 8382 diff changeset	265 return codepoint_to_utf8(codepoint);
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	266 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	267 _unescape_error = true;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	268 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	269 function _readstring(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	270 index = index + 1;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	271 local endindex = json:find("\"", index, true);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	272 if endindex then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	273 local s = json:sub(index, endindex - 1);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	274 --if s:find("[%z-\31]") then return nil, "control char in string"; end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	275 -- FIXME handle control characters
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	276 _unescape_error = nil;
8697 c60fdf148118 util.json: Unescape surrogate pairs Matthew Wild <mwild1@gmail.com> parents: 8382 diff changeset	277 s = s:gsub("\\u[dD][89abAB]%x%x\\u[dD][cdefCDEF]%x%x", _unescape_surrogate_func);
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	278 -- FIXME handle escapes beyond BMP
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	279 s = s:gsub("\\u.?.?.?.?", _unescape_func);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	280 if _unescape_error then return nil, "invalid escape"; end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	281 return s, endindex + 1;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	282 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	283 return nil, "string eof";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	284 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	285 local function _readnumber(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	286 local m = json:match("[0-9%.%-eE%+]+", index); -- FIXME do strict checking
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	287 return tonumber(m), index + #m;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	288 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	289 local function _readnull(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	290 local a, b, c = json:byte(index + 1, index + 3);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	291 if a == 0x75 and b == 0x6c and c == 0x6c then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	292 return null, index + 4;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	293 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	294 return nil, "null parse failed";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	295 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	296 local function _readtrue(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	297 local a, b, c = json:byte(index + 1, index + 3);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	298 if a == 0x72 and b == 0x75 and c == 0x65 then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	299 return true, index + 4;
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	300 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	301 return nil, "true parse failed";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	302 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	303 local function _readfalse(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	304 local a, b, c, d = json:byte(index + 1, index + 4);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	305 if a == 0x61 and b == 0x6c and c == 0x73 and d == 0x65 then
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	306 return false, index + 5;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	307 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	308 return nil, "false parse failed";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	309 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	310 function _readvalue(json, index)
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	311 index = _skip_whitespace(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	312 local b = json:byte(index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	313 -- TODO try table lookup instead of if-else?
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	314 if b == 0x7B then -- "{"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	315 return _readobject(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	316 elseif b == 0x5B then -- "["
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	317 return _readarray(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	318 elseif b == 0x22 then -- "\""
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	319 return _readstring(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	320 elseif b ~= nil and b >= 0x30 and b <= 0x39 or b == 0x2d then -- "0"-"9" or "-"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	321 return _readnumber(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	322 elseif b == 0x6e then -- "n"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	323 return _readnull(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	324 elseif b == 0x74 then -- "t"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	325 return _readtrue(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	326 elseif b == 0x66 then -- "f"
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	327 return _readfalse(json, index);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	328 else
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	329 return nil, "value expected";
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	330 end
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	331 end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	332 local first_escape = {
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	333 ["\\\""] = "\\u0022";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	334 ["\\\\"] = "\\u005c";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	335 ["\\/" ] = "\\u002f";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	336 ["\\b" ] = "\\u0008";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	337 ["\\f" ] = "\\u000C";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	338 ["\\n" ] = "\\u000A";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	339 ["\\r" ] = "\\u000D";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	340 ["\\t" ] = "\\u0009";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	341 ["\\u" ] = "\\u";
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	342 };
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	343
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	344 function module.decode(json)
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	345 json = json:gsub("\\.", first_escape) -- get rid of all escapes except \uXXXX, making string parsing much simpler
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	346 --:gsub("[\r\n]", "\t"); -- \r\n\t are equivalent, we care about none of them, and none of them can be in strings
5776 bd0ff8ae98a8 Remove all trailing whitespace Florian Zeitz <florob@babelmonkeys.de> parents: 5565 diff changeset	347
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	348 -- TODO do encoding verification
5776 bd0ff8ae98a8 Remove all trailing whitespace Florian Zeitz <florob@babelmonkeys.de> parents: 5565 diff changeset	349
5565 6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	350 local val, index = _readvalue(json, 1);
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	351 if val == nil then return val, index; end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	352 if json:find("[^ \t\r\n]", index) then return nil, "garbage at eof"; end
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	353
6dd806829226 util.json: New, faster, stricter, more compliant JSON decoder. Now returns nil,err instead of throwing errors on invalid input. Waqas Hussain <waqas20@gmail.com> parents: 5563 diff changeset	354 return val;
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	355 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	356
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	357 function module.test(object)
925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	358 local encoded = module.encode(object);
925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	359 local decoded = module.decode(encoded);
925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	360 local recoded = module.encode(decoded);
3979 bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	361 if encoded ~= recoded then
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	362 print("FAILED");
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	363 print("encoded:", encoded);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	364 print("recoded:", recoded);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	365 else
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	366 print(encoded);
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	367 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	368 return encoded == recoded;
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	369 end
bf223e6c2b4c util.json: Initial commit. Waqas Hussain <waqas20@gmail.com> parents: diff changeset	370
7261 925f848c706d util.json: Variable renaming to avoid shadowing [luacheck] Matthew Wild <mwild1@gmail.com> parents: 7259 diff changeset	371 return module;

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util/json.lua

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util/json.lua @ 8697:c60fdf148118

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