annotate mod_couchdb/couchdb/json.lib.lua @ 737:e4ea03b060ed

mod_archive: switch from/to The XEP-0136 is not very explicit about the meening of <from> and <to> elements, but the examples are clear: <from> means it comes from the user in the 'with' attribute of the collection. That is the opposite of what is currently implemented in that module. So for better compatibility with complient clients, this switch the 'from' and 'to' fields
author Olivier Goffart <ogoffart@woboq.com>
date Wed, 04 Jul 2012 14:08:43 +0200
parents 316d7c8e1fb0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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204
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1
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2 local type = type;
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3 local t_insert, t_concat, t_remove = table.insert, table.concat, table.remove;
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4 local s_char = string.char;
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5 local tostring, tonumber = tostring, tonumber;
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6 local pairs, ipairs = pairs, ipairs;
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7 local next = next;
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8 local error = error;
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9 local newproxy, getmetatable = newproxy, getmetatable;
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10 local print = print;
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11
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12 --module("json")
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13 local _M = {};
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14
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15 local null = newproxy and newproxy(true) or {};
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16 if getmetatable and getmetatable(null) then
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17 getmetatable(null).__tostring = function() return "null"; end;
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18 end
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19 _M.null = null;
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20
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21 local escapes = {
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22 ["\""] = "\\\"", ["\\"] = "\\\\", ["\b"] = "\\b",
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23 ["\f"] = "\\f", ["\n"] = "\\n", ["\r"] = "\\r", ["\t"] = "\\t"};
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24 local unescapes = {
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25 ["\""] = "\"", ["\\"] = "\\", ["/"] = "/",
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26 b = "\b", f = "\f", n = "\n", r = "\r", t = "\t"};
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27 for i=0,31 do
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28 local ch = s_char(i);
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29 if not escapes[ch] then escapes[ch] = ("\\u%.4X"):format(i); end
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30 end
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31
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32 local valid_types = {
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33 number = true,
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34 string = true,
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35 table = true,
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36 boolean = true
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37 };
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38 local special_keys = {
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39 __array = true;
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40 __hash = true;
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41 };
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42
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43 local simplesave, tablesave, arraysave, stringsave;
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44
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45 function stringsave(o, buffer)
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46 -- FIXME do proper utf-8 and binary data detection
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47 t_insert(buffer, "\""..(o:gsub(".", escapes)).."\"");
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48 end
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49
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50 function arraysave(o, buffer)
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51 t_insert(buffer, "[");
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52 if next(o) then
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53 for i,v in ipairs(o) do
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54 simplesave(v, buffer);
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55 t_insert(buffer, ",");
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56 end
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57 t_remove(buffer);
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58 end
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59 t_insert(buffer, "]");
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60 end
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61
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62 function tablesave(o, buffer)
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63 local __array = {};
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64 local __hash = {};
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65 local hash = {};
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66 for i,v in ipairs(o) do
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67 __array[i] = v;
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68 end
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69 for k,v in pairs(o) do
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70 local ktype, vtype = type(k), type(v);
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71 if valid_types[vtype] or v == null then
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72 if ktype == "string" and not special_keys[k] then
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73 hash[k] = v;
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74 elseif (valid_types[ktype] or k == null) and __array[k] == nil then
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75 __hash[k] = v;
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76 end
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77 end
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78 end
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79 if next(__hash) ~= nil or next(hash) ~= nil or next(__array) == nil then
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80 t_insert(buffer, "{");
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81 local mark = #buffer;
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82 for k,v in pairs(hash) do
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83 stringsave(k, buffer);
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84 t_insert(buffer, ":");
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85 simplesave(v, buffer);
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86 t_insert(buffer, ",");
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87 end
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88 if next(__hash) ~= nil then
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89 t_insert(buffer, "\"__hash\":[");
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90 for k,v in pairs(__hash) do
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91 simplesave(k, buffer);
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92 t_insert(buffer, ",");
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93 simplesave(v, buffer);
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94 t_insert(buffer, ",");
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95 end
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96 t_remove(buffer);
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97 t_insert(buffer, "]");
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98 t_insert(buffer, ",");
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99 end
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100 if next(__array) then
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101 t_insert(buffer, "\"__array\":");
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102 arraysave(__array, buffer);
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103 t_insert(buffer, ",");
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104 end
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105 if mark ~= #buffer then t_remove(buffer); end
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106 t_insert(buffer, "}");
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107 else
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108 arraysave(__array, buffer);
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109 end
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110 end
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111
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112 function simplesave(o, buffer)
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113 local t = type(o);
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114 if t == "number" then
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115 t_insert(buffer, tostring(o));
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116 elseif t == "string" then
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117 stringsave(o, buffer);
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118 elseif t == "table" then
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119 tablesave(o, buffer);
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120 elseif t == "boolean" then
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121 t_insert(buffer, (o and "true" or "false"));
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122 else
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123 t_insert(buffer, "null");
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124 end
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125 end
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126
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127 function _M.encode(obj)
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128 local t = {};
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129 simplesave(obj, t);
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130 return t_concat(t);
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131 end
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132
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133 -----------------------------------
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134
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135
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136 function _M.decode(json)
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137 local pos = 1;
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138 local current = {};
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139 local stack = {};
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140 local ch, peek;
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141 local function next()
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142 ch = json:sub(pos, pos);
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Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
143 pos = pos+1;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
144 peek = json:sub(pos, pos);
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
145 return ch;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
146 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
147
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
148 local function skipwhitespace()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
149 while ch and (ch == "\r" or ch == "\n" or ch == "\t" or ch == " ") do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
150 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
151 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
152 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
153 local function skiplinecomment()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
154 repeat next(); until not(ch) or ch == "\r" or ch == "\n";
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
155 skipwhitespace();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
156 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
157 local function skipstarcomment()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
158 next(); next(); -- skip '/', '*'
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
159 while peek and ch ~= "*" and peek ~= "/" do next(); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
160 if not peek then error("eof in star comment") end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
161 next(); next(); -- skip '*', '/'
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
162 skipwhitespace();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
163 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
164 local function skipstuff()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
165 while true do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
166 skipwhitespace();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
167 if ch == "/" and peek == "*" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
168 skipstarcomment();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
169 elseif ch == "/" and peek == "*" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
170 skiplinecomment();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
171 else
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
172 return;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
173 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
174 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
175 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
176
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
177 local readvalue;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
178 local function readarray()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
179 local t = {};
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
180 next(); -- skip '['
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
181 skipstuff();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
182 if ch == "]" then next(); return t; end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
183 t_insert(t, readvalue());
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
184 while true do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
185 skipstuff();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
186 if ch == "]" then next(); return t; end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
187 if not ch then error("eof while reading array");
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
188 elseif ch == "," then next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
189 elseif ch then error("unexpected character in array, comma expected"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
190 if not ch then error("eof while reading array"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
191 t_insert(t, readvalue());
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
192 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
193 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
194
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
195 local function checkandskip(c)
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
196 local x = ch or "eof";
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
197 if x ~= c then error("unexpected "..x..", '"..c.."' expected"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
198 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
199 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
200 local function readliteral(lit, val)
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
201 for c in lit:gmatch(".") do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
202 checkandskip(c);
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
203 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
204 return val;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
205 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
206 local function readstring()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
207 local s = "";
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
208 checkandskip("\"");
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
209 while ch do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
210 while ch and ch ~= "\\" and ch ~= "\"" do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
211 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
212 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
213 if ch == "\\" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
214 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
215 if unescapes[ch] then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
216 s = s..unescapes[ch];
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
217 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
218 elseif ch == "u" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
219 local seq = "";
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
220 for i=1,4 do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
221 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
222 if not ch then error("unexpected eof in string"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
223 if not ch:match("[0-9a-fA-F]") then error("invalid unicode escape sequence in string"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
224 seq = seq..ch;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
225 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
226 s = s..s.char(tonumber(seq, 16)); -- FIXME do proper utf-8
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
227 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
228 else error("invalid escape sequence in string"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
229 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
230 if ch == "\"" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
231 next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
232 return s;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
233 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
234 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
235 error("eof while reading string");
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
236 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
237 local function readnumber()
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
238 local s = "";
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
239 if ch == "-" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
240 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
241 if not ch:match("[0-9]") then error("number format error"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
242 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
243 if ch == "0" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
244 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
245 if ch:match("[0-9]") then error("number format error"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
246 else
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
247 while ch and ch:match("[0-9]") do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
248 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
249 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
250 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
251 if ch == "." then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
252 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
253 if not ch:match("[0-9]") then error("number format error"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
254 while ch and ch:match("[0-9]") do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
255 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
256 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
257 if ch == "e" or ch == "E" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
258 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
259 if ch == "+" or ch == "-" then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
260 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
261 if not ch:match("[0-9]") then error("number format error"); end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
262 while ch and ch:match("[0-9]") do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
263 s = s..ch; next();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
264 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
265 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
266 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
267 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
268 return tonumber(s);
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
269 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
270 local function readmember(t)
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
271 local k = readstring();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
272 checkandskip(":");
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
273 t[k] = readvalue();
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
274 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
275 local function fixobject(obj)
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
276 local __array = obj.__array;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
277 if __array then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
278 obj.__array = nil;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
279 for i,v in ipairs(__array) do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
280 t_insert(obj, v);
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
281 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
282 end
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
283 local __hash = obj.__hash;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
284 if __hash then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
285 obj.__hash = nil;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
286 local k;
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
287 for i,v in ipairs(__hash) do
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
288 if k ~= nil then
316d7c8e1fb0 mod_couchdb: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
289 obj[k] = v; k = nil;
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290 else
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291 k = v;
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292 end
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293 end
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294 end
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295 return obj;
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296 end
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297 local function readobject()
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298 local t = {};
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299 next(); -- skip '{'
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300 skipstuff();
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301 if ch == "}" then next(); return t; end
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302 if not ch then error("eof while reading object"); end
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303 readmember(t);
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304 while true do
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305 skipstuff();
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306 if ch == "}" then next(); return fixobject(t); end
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307 if not ch then error("eof while reading object");
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308 elseif ch == "," then next();
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309 elseif ch then error("unexpected character in object, comma expected"); end
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310 if not ch then error("eof while reading object"); end
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311 readmember(t);
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312 end
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313 end
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314
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315 function readvalue()
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316 skipstuff();
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317 while ch do
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318 if ch == "{" then
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319 return readobject();
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320 elseif ch == "[" then
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321 return readarray();
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322 elseif ch == "\"" then
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323 return readstring();
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324 elseif ch:match("[%-0-9%.]") then
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325 return readnumber();
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326 elseif ch == "n" then
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327 return readliteral("null", null);
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328 elseif ch == "t" then
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329 return readliteral("true", true);
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330 elseif ch == "f" then
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331 return readliteral("false", false);
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332 end
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333 end
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334 error("eof while reading value");
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335 end
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336 next();
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337 return readvalue();
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338 end
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339
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340 function _M.test(object)
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341 local encoded = encode(object);
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342 local decoded = decode(encoded);
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343 local recoded = encode(decoded);
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344 if encoded ~= recoded then
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345 print("FAILED");
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346 print("encoded:", encoded);
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347 print("recoded:", recoded);
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348 else
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349 print(encoded);
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350 end
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351 return encoded ~= recoded;
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352 end
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353
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354 return _M;