ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | var $JSON = global.JSON; |
| 29 | |
| 30 | function ParseJSONUnfiltered(text) { |
| 31 | var s = $String(text); |
fschneider@chromium.org | e03fb64 | 2010-11-01 12:34:09 +0000 | [diff] [blame] | 32 | return %ParseJson(s); |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 33 | } |
| 34 | |
| 35 | function Revive(holder, name, reviver) { |
| 36 | var val = holder[name]; |
| 37 | if (IS_OBJECT(val)) { |
| 38 | if (IS_ARRAY(val)) { |
| 39 | var length = val.length; |
| 40 | for (var i = 0; i < length; i++) { |
| 41 | var newElement = Revive(val, $String(i), reviver); |
| 42 | val[i] = newElement; |
| 43 | } |
| 44 | } else { |
| 45 | for (var p in val) { |
| 46 | if (ObjectHasOwnProperty.call(val, p)) { |
| 47 | var newElement = Revive(val, p, reviver); |
| 48 | if (IS_UNDEFINED(newElement)) { |
| 49 | delete val[p]; |
| 50 | } else { |
| 51 | val[p] = newElement; |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | } |
| 57 | return reviver.call(holder, name, val); |
| 58 | } |
| 59 | |
| 60 | function JSONParse(text, reviver) { |
| 61 | var unfiltered = ParseJSONUnfiltered(text); |
| 62 | if (IS_FUNCTION(reviver)) { |
| 63 | return Revive({'': unfiltered}, '', reviver); |
| 64 | } else { |
| 65 | return unfiltered; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | var characterQuoteCache = { |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 70 | '\b': '\\b', // ASCII 8, Backspace |
| 71 | '\t': '\\t', // ASCII 9, Tab |
| 72 | '\n': '\\n', // ASCII 10, Newline |
| 73 | '\f': '\\f', // ASCII 12, Formfeed |
| 74 | '\r': '\\r', // ASCII 13, Carriage Return |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 75 | '\"': '\\"', |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 76 | '\\': '\\\\' |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 77 | }; |
| 78 | |
| 79 | function QuoteSingleJSONCharacter(c) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 80 | if (c in characterQuoteCache) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 81 | return characterQuoteCache[c]; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 82 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 83 | var charCode = c.charCodeAt(0); |
| 84 | var result; |
| 85 | if (charCode < 16) result = '\\u000'; |
| 86 | else if (charCode < 256) result = '\\u00'; |
| 87 | else if (charCode < 4096) result = '\\u0'; |
| 88 | else result = '\\u'; |
| 89 | result += charCode.toString(16); |
| 90 | characterQuoteCache[c] = result; |
| 91 | return result; |
| 92 | } |
| 93 | |
| 94 | function QuoteJSONString(str) { |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 95 | var quotable = /[\\\"\x00-\x1f]/g; |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 96 | return '"' + str.replace(quotable, QuoteSingleJSONCharacter) + '"'; |
| 97 | } |
| 98 | |
| 99 | function StackContains(stack, val) { |
| 100 | var length = stack.length; |
| 101 | for (var i = 0; i < length; i++) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 102 | if (stack[i] === val) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 103 | return true; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 104 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 105 | } |
| 106 | return false; |
| 107 | } |
| 108 | |
| 109 | function SerializeArray(value, replacer, stack, indent, gap) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 110 | if (StackContains(stack, value)) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 111 | throw MakeTypeError('circular_structure', []); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 112 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 113 | stack.push(value); |
| 114 | var stepback = indent; |
| 115 | indent += gap; |
| 116 | var partial = []; |
| 117 | var len = value.length; |
| 118 | for (var i = 0; i < len; i++) { |
| 119 | var strP = JSONSerialize($String(i), value, replacer, stack, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 120 | indent, gap); |
| 121 | if (IS_UNDEFINED(strP)) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 122 | strP = "null"; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 123 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 124 | partial.push(strP); |
| 125 | } |
| 126 | var final; |
| 127 | if (gap == "") { |
| 128 | final = "[" + partial.join(",") + "]"; |
| 129 | } else if (partial.length > 0) { |
| 130 | var separator = ",\n" + indent; |
| 131 | final = "[\n" + indent + partial.join(separator) + "\n" + |
| 132 | stepback + "]"; |
| 133 | } else { |
| 134 | final = "[]"; |
| 135 | } |
| 136 | stack.pop(); |
| 137 | return final; |
| 138 | } |
| 139 | |
| 140 | function SerializeObject(value, replacer, stack, indent, gap) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 141 | if (StackContains(stack, value)) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 142 | throw MakeTypeError('circular_structure', []); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 143 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 144 | stack.push(value); |
| 145 | var stepback = indent; |
| 146 | indent += gap; |
| 147 | var partial = []; |
| 148 | if (IS_ARRAY(replacer)) { |
| 149 | var length = replacer.length; |
| 150 | for (var i = 0; i < length; i++) { |
| 151 | if (ObjectHasOwnProperty.call(replacer, i)) { |
| 152 | var p = replacer[i]; |
| 153 | var strP = JSONSerialize(p, value, replacer, stack, indent, gap); |
| 154 | if (!IS_UNDEFINED(strP)) { |
| 155 | var member = QuoteJSONString(p) + ":"; |
| 156 | if (gap != "") member += " "; |
| 157 | member += strP; |
| 158 | partial.push(member); |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | } else { |
| 163 | for (var p in value) { |
| 164 | if (ObjectHasOwnProperty.call(value, p)) { |
| 165 | var strP = JSONSerialize(p, value, replacer, stack, indent, gap); |
| 166 | if (!IS_UNDEFINED(strP)) { |
| 167 | var member = QuoteJSONString(p) + ":"; |
| 168 | if (gap != "") member += " "; |
| 169 | member += strP; |
| 170 | partial.push(member); |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | } |
| 175 | var final; |
| 176 | if (gap == "") { |
| 177 | final = "{" + partial.join(",") + "}"; |
| 178 | } else if (partial.length > 0) { |
| 179 | var separator = ",\n" + indent; |
| 180 | final = "{\n" + indent + partial.join(separator) + "\n" + |
| 181 | stepback + "}"; |
| 182 | } else { |
| 183 | final = "{}"; |
| 184 | } |
| 185 | stack.pop(); |
| 186 | return final; |
| 187 | } |
| 188 | |
| 189 | function JSONSerialize(key, holder, replacer, stack, indent, gap) { |
| 190 | var value = holder[key]; |
| 191 | if (IS_OBJECT(value) && value) { |
| 192 | var toJSON = value.toJSON; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 193 | if (IS_FUNCTION(toJSON)) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 194 | value = toJSON.call(value, key); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 195 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 196 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 197 | if (IS_FUNCTION(replacer)) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 198 | value = replacer.call(holder, key, value); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 199 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 200 | // Unwrap value if necessary |
| 201 | if (IS_OBJECT(value)) { |
| 202 | if (IS_NUMBER_WRAPPER(value)) { |
| 203 | value = $Number(value); |
| 204 | } else if (IS_STRING_WRAPPER(value)) { |
| 205 | value = $String(value); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 206 | } else if (IS_BOOLEAN_WRAPPER(value)) { |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 207 | value = %_ValueOf(value); |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 208 | } |
| 209 | } |
| 210 | switch (typeof value) { |
| 211 | case "string": |
| 212 | return QuoteJSONString(value); |
| 213 | case "object": |
| 214 | if (!value) { |
| 215 | return "null"; |
| 216 | } else if (IS_ARRAY(value)) { |
| 217 | return SerializeArray(value, replacer, stack, indent, gap); |
| 218 | } else { |
| 219 | return SerializeObject(value, replacer, stack, indent, gap); |
| 220 | } |
| 221 | case "number": |
| 222 | return $isFinite(value) ? $String(value) : "null"; |
| 223 | case "boolean": |
| 224 | return value ? "true" : "false"; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | function JSONStringify(value, replacer, space) { |
| 229 | var stack = []; |
| 230 | var indent = ""; |
| 231 | if (IS_OBJECT(space)) { |
| 232 | // Unwrap 'space' if it is wrapped |
| 233 | if (IS_NUMBER_WRAPPER(space)) { |
| 234 | space = $Number(space); |
| 235 | } else if (IS_STRING_WRAPPER(space)) { |
| 236 | space = $String(space); |
| 237 | } |
| 238 | } |
| 239 | var gap; |
| 240 | if (IS_NUMBER(space)) { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 241 | space = $Math.min(ToInteger(space), 10); |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 242 | gap = ""; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 243 | for (var i = 0; i < space; i++) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 244 | gap += " "; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 245 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 246 | } else if (IS_STRING(space)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 247 | if (space.length > 10) { |
| 248 | gap = space.substring(0, 10); |
| 249 | } else { |
| 250 | gap = space; |
| 251 | } |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 252 | } else { |
| 253 | gap = ""; |
| 254 | } |
| 255 | return JSONSerialize('', {'': value}, replacer, stack, indent, gap); |
| 256 | } |
| 257 | |
| 258 | function SetupJSON() { |
| 259 | InstallFunctions($JSON, DONT_ENUM, $Array( |
| 260 | "parse", JSONParse, |
| 261 | "stringify", JSONStringify |
| 262 | )); |
| 263 | } |
| 264 | |
| 265 | SetupJSON(); |