| 提交 | 用户 | 时间 | ||
| 71e81e | 1 | /*! JSON v3.2.6 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */ |
| 懒 | 2 | ;(function (window) { |
| 3 | // Convenience aliases. | |
| 4 | var getClass = {}.toString, isProperty, forEach, undef; | |
| 5 | ||
| 6 | // Detect the `define` function exposed by asynchronous module loaders. The | |
| 7 | // strict `define` check is necessary for compatibility with `r.js`. | |
| 8 | var isLoader = typeof define === "function" && define.amd; | |
| 9 | ||
| 10 | // Detect native implementations. | |
| 11 | var nativeJSON = typeof JSON == "object" && JSON; | |
| 12 | ||
| 13 | // Set up the JSON 3 namespace, preferring the CommonJS `exports` object if | |
| 14 | // available. | |
| 15 | var JSON3 = typeof exports == "object" && exports && !exports.nodeType && exports; | |
| 16 | ||
| 17 | if (JSON3 && nativeJSON) { | |
| 18 | // Explicitly delegate to the native `stringify` and `parse` | |
| 19 | // implementations in CommonJS environments. | |
| 20 | JSON3.stringify = nativeJSON.stringify; | |
| 21 | JSON3.parse = nativeJSON.parse; | |
| 22 | } else { | |
| 23 | // Export for web browsers, JavaScript engines, and asynchronous module | |
| 24 | // loaders, using the global `JSON` object if available. | |
| 25 | JSON3 = window.JSON = nativeJSON || {}; | |
| 26 | } | |
| 27 | ||
| 28 | // Test the `Date#getUTC*` methods. Based on work by @Yaffle. | |
| 29 | var isExtended = new Date(-3509827334573292); | |
| 30 | try { | |
| 31 | // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical | |
| 32 | // results for certain dates in Opera >= 10.53. | |
| 33 | isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 && | |
| 34 | // Safari < 2.0.2 stores the internal millisecond time value correctly, | |
| 35 | // but clips the values returned by the date methods to the range of | |
| 36 | // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]). | |
| 37 | isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708; | |
| 38 | } catch (exception) {} | |
| 39 | ||
| 40 | // Internal: Determines whether the native `JSON.stringify` and `parse` | |
| 41 | // implementations are spec-compliant. Based on work by Ken Snyder. | |
| 42 | function has(name) { | |
| 43 | if (has[name] !== undef) { | |
| 44 | // Return cached feature test result. | |
| 45 | return has[name]; | |
| 46 | } | |
| 47 | ||
| 48 | var isSupported; | |
| 49 | if (name == "bug-string-char-index") { | |
| 50 | // IE <= 7 doesn't support accessing string characters using square | |
| 51 | // bracket notation. IE 8 only supports this for primitives. | |
| 52 | isSupported = "a"[0] != "a"; | |
| 53 | } else if (name == "json") { | |
| 54 | // Indicates whether both `JSON.stringify` and `JSON.parse` are | |
| 55 | // supported. | |
| 56 | isSupported = has("json-stringify") && has("json-parse"); | |
| 57 | } else { | |
| 58 | var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}'; | |
| 59 | // Test `JSON.stringify`. | |
| 60 | if (name == "json-stringify") { | |
| 61 | var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended; | |
| 62 | if (stringifySupported) { | |
| 63 | // A test function object with a custom `toJSON` method. | |
| 64 | (value = function () { | |
| 65 | return 1; | |
| 66 | }).toJSON = value; | |
| 67 | try { | |
| 68 | stringifySupported = | |
| 69 | // Firefox 3.1b1 and b2 serialize string, number, and boolean | |
| 70 | // primitives as object literals. | |
| 71 | stringify(0) === "0" && | |
| 72 | // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object | |
| 73 | // literals. | |
| 74 | stringify(new Number()) === "0" && | |
| 75 | stringify(new String()) == '""' && | |
| 76 | // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or | |
| 77 | // does not define a canonical JSON representation (this applies to | |
| 78 | // objects with `toJSON` properties as well, *unless* they are nested | |
| 79 | // within an object or array). | |
| 80 | stringify(getClass) === undef && | |
| 81 | // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and | |
| 82 | // FF 3.1b3 pass this test. | |
| 83 | stringify(undef) === undef && | |
| 84 | // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s, | |
| 85 | // respectively, if the value is omitted entirely. | |
| 86 | stringify() === undef && | |
| 87 | // FF 3.1b1, 2 throw an error if the given value is not a number, | |
| 88 | // string, array, object, Boolean, or `null` literal. This applies to | |
| 89 | // objects with custom `toJSON` methods as well, unless they are nested | |
| 90 | // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON` | |
| 91 | // methods entirely. | |
| 92 | stringify(value) === "1" && | |
| 93 | stringify([value]) == "[1]" && | |
| 94 | // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of | |
| 95 | // `"[null]"`. | |
| 96 | stringify([undef]) == "[null]" && | |
| 97 | // YUI 3.0.0b1 fails to serialize `null` literals. | |
| 98 | stringify(null) == "null" && | |
| 99 | // FF 3.1b1, 2 halts serialization if an array contains a function: | |
| 100 | // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3 | |
| 101 | // elides non-JSON values from objects and arrays, unless they | |
| 102 | // define custom `toJSON` methods. | |
| 103 | stringify([undef, getClass, null]) == "[null,null,null]" && | |
| 104 | // Simple serialization test. FF 3.1b1 uses Unicode escape sequences | |
| 105 | // where character escape codes are expected (e.g., `\b` => `\u0008`). | |
| 106 | stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized && | |
| 107 | // FF 3.1b1 and b2 ignore the `filter` and `width` arguments. | |
| 108 | stringify(null, value) === "1" && | |
| 109 | stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" && | |
| 110 | // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly | |
| 111 | // serialize extended years. | |
| 112 | stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' && | |
| 113 | // The milliseconds are optional in ES 5, but required in 5.1. | |
| 114 | stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' && | |
| 115 | // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative | |
| 116 | // four-digit years instead of six-digit years. Credits: @Yaffle. | |
| 117 | stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' && | |
| 118 | // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond | |
| 119 | // values less than 1000. Credits: @Yaffle. | |
| 120 | stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"'; | |
| 121 | } catch (exception) { | |
| 122 | stringifySupported = false; | |
| 123 | } | |
| 124 | } | |
| 125 | isSupported = stringifySupported; | |
| 126 | } | |
| 127 | // Test `JSON.parse`. | |
| 128 | if (name == "json-parse") { | |
| 129 | var parse = JSON3.parse; | |
| 130 | if (typeof parse == "function") { | |
| 131 | try { | |
| 132 | // FF 3.1b1, b2 will throw an exception if a bare literal is provided. | |
| 133 | // Conforming implementations should also coerce the initial argument to | |
| 134 | // a string prior to parsing. | |
| 135 | if (parse("0") === 0 && !parse(false)) { | |
| 136 | // Simple parsing test. | |
| 137 | value = parse(serialized); | |
| 138 | var parseSupported = value["a"].length == 5 && value["a"][0] === 1; | |
| 139 | if (parseSupported) { | |
| 140 | try { | |
| 141 | // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings. | |
| 142 | parseSupported = !parse('"\t"'); | |
| 143 | } catch (exception) {} | |
| 144 | if (parseSupported) { | |
| 145 | try { | |
| 146 | // FF 4.0 and 4.0.1 allow leading `+` signs and leading | |
| 147 | // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow | |
| 148 | // certain octal literals. | |
| 149 | parseSupported = parse("01") !== 1; | |
| 150 | } catch (exception) {} | |
| 151 | } | |
| 152 | if (parseSupported) { | |
| 153 | try { | |
| 154 | // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal | |
| 155 | // points. These environments, along with FF 3.1b1 and 2, | |
| 156 | // also allow trailing commas in JSON objects and arrays. | |
| 157 | parseSupported = parse("1.") !== 1; | |
| 158 | } catch (exception) {} | |
| 159 | } | |
| 160 | } | |
| 161 | } | |
| 162 | } catch (exception) { | |
| 163 | parseSupported = false; | |
| 164 | } | |
| 165 | } | |
| 166 | isSupported = parseSupported; | |
| 167 | } | |
| 168 | } | |
| 169 | return has[name] = !!isSupported; | |
| 170 | } | |
| 171 | ||
| 172 | if (!has("json")) { | |
| 173 | // Common `[[Class]]` name aliases. | |
| 174 | var functionClass = "[object Function]"; | |
| 175 | var dateClass = "[object Date]"; | |
| 176 | var numberClass = "[object Number]"; | |
| 177 | var stringClass = "[object String]"; | |
| 178 | var arrayClass = "[object Array]"; | |
| 179 | var booleanClass = "[object Boolean]"; | |
| 180 | ||
| 181 | // Detect incomplete support for accessing string characters by index. | |
| 182 | var charIndexBuggy = has("bug-string-char-index"); | |
| 183 | ||
| 184 | // Define additional utility methods if the `Date` methods are buggy. | |
| 185 | if (!isExtended) { | |
| 186 | var floor = Math.floor; | |
| 187 | // A mapping between the months of the year and the number of days between | |
| 188 | // January 1st and the first of the respective month. | |
| 189 | var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]; | |
| 190 | // Internal: Calculates the number of days between the Unix epoch and the | |
| 191 | // first day of the given month. | |
| 192 | var getDay = function (year, month) { | |
| 193 | return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400); | |
| 194 | }; | |
| 195 | } | |
| 196 | ||
| 197 | // Internal: Determines if a property is a direct property of the given | |
| 198 | // object. Delegates to the native `Object#hasOwnProperty` method. | |
| 199 | if (!(isProperty = {}.hasOwnProperty)) { | |
| 200 | isProperty = function (property) { | |
| 201 | var members = {}, constructor; | |
| 202 | if ((members.__proto__ = null, members.__proto__ = { | |
| 203 | // The *proto* property cannot be set multiple times in recent | |
| 204 | // versions of Firefox and SeaMonkey. | |
| 205 | "toString": 1 | |
| 206 | }, members).toString != getClass) { | |
| 207 | // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but | |
| 208 | // supports the mutable *proto* property. | |
| 209 | isProperty = function (property) { | |
| 210 | // Capture and break the object's prototype chain (see section 8.6.2 | |
| 211 | // of the ES 5.1 spec). The parenthesized expression prevents an | |
| 212 | // unsafe transformation by the Closure Compiler. | |
| 213 | var original = this.__proto__, result = property in (this.__proto__ = null, this); | |
| 214 | // Restore the original prototype chain. | |
| 215 | this.__proto__ = original; | |
| 216 | return result; | |
| 217 | }; | |
| 218 | } else { | |
| 219 | // Capture a reference to the top-level `Object` constructor. | |
| 220 | constructor = members.constructor; | |
| 221 | // Use the `constructor` property to simulate `Object#hasOwnProperty` in | |
| 222 | // other environments. | |
| 223 | isProperty = function (property) { | |
| 224 | var parent = (this.constructor || constructor).prototype; | |
| 225 | return property in this && !(property in parent && this[property] === parent[property]); | |
| 226 | }; | |
| 227 | } | |
| 228 | members = null; | |
| 229 | return isProperty.call(this, property); | |
| 230 | }; | |
| 231 | } | |
| 232 | ||
| 233 | // Internal: A set of primitive types used by `isHostType`. | |
| 234 | var PrimitiveTypes = { | |
| 235 | 'boolean': 1, | |
| 236 | 'number': 1, | |
| 237 | 'string': 1, | |
| 238 | 'undefined': 1 | |
| 239 | }; | |
| 240 | ||
| 241 | // Internal: Determines if the given object `property` value is a | |
| 242 | // non-primitive. | |
| 243 | var isHostType = function (object, property) { | |
| 244 | var type = typeof object[property]; | |
| 245 | return type == 'object' ? !!object[property] : !PrimitiveTypes[type]; | |
| 246 | }; | |
| 247 | ||
| 248 | // Internal: Normalizes the `for...in` iteration algorithm across | |
| 249 | // environments. Each enumerated key is yielded to a `callback` function. | |
| 250 | forEach = function (object, callback) { | |
| 251 | var size = 0, Properties, members, property; | |
| 252 | ||
| 253 | // Tests for bugs in the current environment's `for...in` algorithm. The | |
| 254 | // `valueOf` property inherits the non-enumerable flag from | |
| 255 | // `Object.prototype` in older versions of IE, Netscape, and Mozilla. | |
| 256 | (Properties = function () { | |
| 257 | this.valueOf = 0; | |
| 258 | }).prototype.valueOf = 0; | |
| 259 | ||
| 260 | // Iterate over a new instance of the `Properties` class. | |
| 261 | members = new Properties(); | |
| 262 | for (property in members) { | |
| 263 | // Ignore all properties inherited from `Object.prototype`. | |
| 264 | if (isProperty.call(members, property)) { | |
| 265 | size++; | |
| 266 | } | |
| 267 | } | |
| 268 | Properties = members = null; | |
| 269 | ||
| 270 | // Normalize the iteration algorithm. | |
| 271 | if (!size) { | |
| 272 | // A list of non-enumerable properties inherited from `Object.prototype`. | |
| 273 | members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"]; | |
| 274 | // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable | |
| 275 | // properties. | |
| 276 | forEach = function (object, callback) { | |
| 277 | var isFunction = getClass.call(object) == functionClass, property, length; | |
| 278 | var hasProperty = !isFunction && typeof object.constructor != 'function' && isHostType(object, 'hasOwnProperty') ? object.hasOwnProperty : isProperty; | |
| 279 | for (property in object) { | |
| 280 | // Gecko <= 1.0 enumerates the `prototype` property of functions under | |
| 281 | // certain conditions; IE does not. | |
| 282 | if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) { | |
| 283 | callback(property); | |
| 284 | } | |
| 285 | } | |
| 286 | // Manually invoke the callback for each non-enumerable property. | |
| 287 | for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property)); | |
| 288 | }; | |
| 289 | } else if (size == 2) { | |
| 290 | // Safari <= 2.0.4 enumerates shadowed properties twice. | |
| 291 | forEach = function (object, callback) { | |
| 292 | // Create a set of iterated properties. | |
| 293 | var members = {}, isFunction = getClass.call(object) == functionClass, property; | |
| 294 | for (property in object) { | |
| 295 | // Store each property name to prevent double enumeration. The | |
| 296 | // `prototype` property of functions is not enumerated due to cross- | |
| 297 | // environment inconsistencies. | |
| 298 | if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) { | |
| 299 | callback(property); | |
| 300 | } | |
| 301 | } | |
| 302 | }; | |
| 303 | } else { | |
| 304 | // No bugs detected; use the standard `for...in` algorithm. | |
| 305 | forEach = function (object, callback) { | |
| 306 | var isFunction = getClass.call(object) == functionClass, property, isConstructor; | |
| 307 | for (property in object) { | |
| 308 | if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) { | |
| 309 | callback(property); | |
| 310 | } | |
| 311 | } | |
| 312 | // Manually invoke the callback for the `constructor` property due to | |
| 313 | // cross-environment inconsistencies. | |
| 314 | if (isConstructor || isProperty.call(object, (property = "constructor"))) { | |
| 315 | callback(property); | |
| 316 | } | |
| 317 | }; | |
| 318 | } | |
| 319 | return forEach(object, callback); | |
| 320 | }; | |
| 321 | ||
| 322 | // Public: Serializes a JavaScript `value` as a JSON string. The optional | |
| 323 | // `filter` argument may specify either a function that alters how object and | |
| 324 | // array members are serialized, or an array of strings and numbers that | |
| 325 | // indicates which properties should be serialized. The optional `width` | |
| 326 | // argument may be either a string or number that specifies the indentation | |
| 327 | // level of the output. | |
| 328 | if (!has("json-stringify")) { | |
| 329 | // Internal: A map of control characters and their escaped equivalents. | |
| 330 | var Escapes = { | |
| 331 | 92: "\\\\", | |
| 332 | 34: '\\"', | |
| 333 | 8: "\\b", | |
| 334 | 12: "\\f", | |
| 335 | 10: "\\n", | |
| 336 | 13: "\\r", | |
| 337 | 9: "\\t" | |
| 338 | }; | |
| 339 | ||
| 340 | // Internal: Converts `value` into a zero-padded string such that its | |
| 341 | // length is at least equal to `width`. The `width` must be <= 6. | |
| 342 | var leadingZeroes = "000000"; | |
| 343 | var toPaddedString = function (width, value) { | |
| 344 | // The `|| 0` expression is necessary to work around a bug in | |
| 345 | // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`. | |
| 346 | return (leadingZeroes + (value || 0)).slice(-width); | |
| 347 | }; | |
| 348 | ||
| 349 | // Internal: Double-quotes a string `value`, replacing all ASCII control | |
| 350 | // characters (characters with code unit values between 0 and 31) with | |
| 351 | // their escaped equivalents. This is an implementation of the | |
| 352 | // `Quote(value)` operation defined in ES 5.1 section 15.12.3. | |
| 353 | var unicodePrefix = "\\u00"; | |
| 354 | var quote = function (value) { | |
| 355 | var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols; | |
| 356 | if (isLarge) { | |
| 357 | symbols = value.split(""); | |
| 358 | } | |
| 359 | for (; index < length; index++) { | |
| 360 | var charCode = value.charCodeAt(index); | |
| 361 | // If the character is a control character, append its Unicode or | |
| 362 | // shorthand escape sequence; otherwise, append the character as-is. | |
| 363 | switch (charCode) { | |
| 364 | case 8: case 9: case 10: case 12: case 13: case 34: case 92: | |
| 365 | result += Escapes[charCode]; | |
| 366 | break; | |
| 367 | default: | |
| 368 | if (charCode < 32) { | |
| 369 | result += unicodePrefix + toPaddedString(2, charCode.toString(16)); | |
| 370 | break; | |
| 371 | } | |
| 372 | result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index]; | |
| 373 | } | |
| 374 | } | |
| 375 | return result + '"'; | |
| 376 | }; | |
| 377 | ||
| 378 | // Internal: Recursively serializes an object. Implements the | |
| 379 | // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations. | |
| 380 | var serialize = function (property, object, callback, properties, whitespace, indentation, stack) { | |
| 381 | var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result; | |
| 382 | try { | |
| 383 | // Necessary for host object support. | |
| 384 | value = object[property]; | |
| 385 | } catch (exception) {} | |
| 386 | if (typeof value == "object" && value) { | |
| 387 | className = getClass.call(value); | |
| 388 | if (className == dateClass && !isProperty.call(value, "toJSON")) { | |
| 389 | if (value > -1 / 0 && value < 1 / 0) { | |
| 390 | // Dates are serialized according to the `Date#toJSON` method | |
| 391 | // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15 | |
| 392 | // for the ISO 8601 date time string format. | |
| 393 | if (getDay) { | |
| 394 | // Manually compute the year, month, date, hours, minutes, | |
| 395 | // seconds, and milliseconds if the `getUTC*` methods are | |
| 396 | // buggy. Adapted from @Yaffle's `date-shim` project. | |
| 397 | date = floor(value / 864e5); | |
| 398 | for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++); | |
| 399 | for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++); | |
| 400 | date = 1 + date - getDay(year, month); | |
| 401 | // The `time` value specifies the time within the day (see ES | |
| 402 | // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used | |
| 403 | // to compute `A modulo B`, as the `%` operator does not | |
| 404 | // correspond to the `modulo` operation for negative numbers. | |
| 405 | time = (value % 864e5 + 864e5) % 864e5; | |
| 406 | // The hours, minutes, seconds, and milliseconds are obtained by | |
| 407 | // decomposing the time within the day. See section 15.9.1.10. | |
| 408 | hours = floor(time / 36e5) % 24; | |
| 409 | minutes = floor(time / 6e4) % 60; | |
| 410 | seconds = floor(time / 1e3) % 60; | |
| 411 | milliseconds = time % 1e3; | |
| 412 | } else { | |
| 413 | year = value.getUTCFullYear(); | |
| 414 | month = value.getUTCMonth(); | |
| 415 | date = value.getUTCDate(); | |
| 416 | hours = value.getUTCHours(); | |
| 417 | minutes = value.getUTCMinutes(); | |
| 418 | seconds = value.getUTCSeconds(); | |
| 419 | milliseconds = value.getUTCMilliseconds(); | |
| 420 | } | |
| 421 | // Serialize extended years correctly. | |
| 422 | value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) + | |
| 423 | "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) + | |
| 424 | // Months, dates, hours, minutes, and seconds should have two | |
| 425 | // digits; milliseconds should have three. | |
| 426 | "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) + | |
| 427 | // Milliseconds are optional in ES 5.0, but required in 5.1. | |
| 428 | "." + toPaddedString(3, milliseconds) + "Z"; | |
| 429 | } else { | |
| 430 | value = null; | |
| 431 | } | |
| 432 | } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) { | |
| 433 | // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the | |
| 434 | // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3 | |
| 435 | // ignores all `toJSON` methods on these objects unless they are | |
| 436 | // defined directly on an instance. | |
| 437 | value = value.toJSON(property); | |
| 438 | } | |
| 439 | } | |
| 440 | if (callback) { | |
| 441 | // If a replacement function was provided, call it to obtain the value | |
| 442 | // for serialization. | |
| 443 | value = callback.call(object, property, value); | |
| 444 | } | |
| 445 | if (value === null) { | |
| 446 | return "null"; | |
| 447 | } | |
| 448 | className = getClass.call(value); | |
| 449 | if (className == booleanClass) { | |
| 450 | // Booleans are represented literally. | |
| 451 | return "" + value; | |
| 452 | } else if (className == numberClass) { | |
| 453 | // JSON numbers must be finite. `Infinity` and `NaN` are serialized as | |
| 454 | // `"null"`. | |
| 455 | return value > -1 / 0 && value < 1 / 0 ? "" + value : "null"; | |
| 456 | } else if (className == stringClass) { | |
| 457 | // Strings are double-quoted and escaped. | |
| 458 | return quote("" + value); | |
| 459 | } | |
| 460 | // Recursively serialize objects and arrays. | |
| 461 | if (typeof value == "object") { | |
| 462 | // Check for cyclic structures. This is a linear search; performance | |
| 463 | // is inversely proportional to the number of unique nested objects. | |
| 464 | for (length = stack.length; length--;) { | |
| 465 | if (stack[length] === value) { | |
| 466 | // Cyclic structures cannot be serialized by `JSON.stringify`. | |
| 467 | throw TypeError(); | |
| 468 | } | |
| 469 | } | |
| 470 | // Add the object to the stack of traversed objects. | |
| 471 | stack.push(value); | |
| 472 | results = []; | |
| 473 | // Save the current indentation level and indent one additional level. | |
| 474 | prefix = indentation; | |
| 475 | indentation += whitespace; | |
| 476 | if (className == arrayClass) { | |
| 477 | // Recursively serialize array elements. | |
| 478 | for (index = 0, length = value.length; index < length; index++) { | |
| 479 | element = serialize(index, value, callback, properties, whitespace, indentation, stack); | |
| 480 | results.push(element === undef ? "null" : element); | |
| 481 | } | |
| 482 | result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]"; | |
| 483 | } else { | |
| 484 | // Recursively serialize object members. Members are selected from | |
| 485 | // either a user-specified list of property names, or the object | |
| 486 | // itself. | |
| 487 | forEach(properties || value, function (property) { | |
| 488 | var element = serialize(property, value, callback, properties, whitespace, indentation, stack); | |
| 489 | if (element !== undef) { | |
| 490 | // According to ES 5.1 section 15.12.3: "If `gap` {whitespace} | |
| 491 | // is not the empty string, let `member` {quote(property) + ":"} | |
| 492 | // be the concatenation of `member` and the `space` character." | |
| 493 | // The "`space` character" refers to the literal space | |
| 494 | // character, not the `space` {width} argument provided to | |
| 495 | // `JSON.stringify`. | |
| 496 | results.push(quote(property) + ":" + (whitespace ? " " : "") + element); | |
| 497 | } | |
| 498 | }); | |
| 499 | result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}"; | |
| 500 | } | |
| 501 | // Remove the object from the traversed object stack. | |
| 502 | stack.pop(); | |
| 503 | return result; | |
| 504 | } | |
| 505 | }; | |
| 506 | ||
| 507 | // Public: `JSON.stringify`. See ES 5.1 section 15.12.3. | |
| 508 | JSON3.stringify = function (source, filter, width) { | |
| 509 | var whitespace, callback, properties, className; | |
| 510 | if (typeof filter == "function" || typeof filter == "object" && filter) { | |
| 511 | if ((className = getClass.call(filter)) == functionClass) { | |
| 512 | callback = filter; | |
| 513 | } else if (className == arrayClass) { | |
| 514 | // Convert the property names array into a makeshift set. | |
| 515 | properties = {}; | |
| 516 | for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1)); | |
| 517 | } | |
| 518 | } | |
| 519 | if (width) { | |
| 520 | if ((className = getClass.call(width)) == numberClass) { | |
| 521 | // Convert the `width` to an integer and create a string containing | |
| 522 | // `width` number of space characters. | |
| 523 | if ((width -= width % 1) > 0) { | |
| 524 | for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " "); | |
| 525 | } | |
| 526 | } else if (className == stringClass) { | |
| 527 | whitespace = width.length <= 10 ? width : width.slice(0, 10); | |
| 528 | } | |
| 529 | } | |
| 530 | // Opera <= 7.54u2 discards the values associated with empty string keys | |
| 531 | // (`""`) only if they are used directly within an object member list | |
| 532 | // (e.g., `!("" in { "": 1})`). | |
| 533 | return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []); | |
| 534 | }; | |
| 535 | } | |
| 536 | ||
| 537 | // Public: Parses a JSON source string. | |
| 538 | if (!has("json-parse")) { | |
| 539 | var fromCharCode = String.fromCharCode; | |
| 540 | ||
| 541 | // Internal: A map of escaped control characters and their unescaped | |
| 542 | // equivalents. | |
| 543 | var Unescapes = { | |
| 544 | 92: "\\", | |
| 545 | 34: '"', | |
| 546 | 47: "/", | |
| 547 | 98: "\b", | |
| 548 | 116: "\t", | |
| 549 | 110: "\n", | |
| 550 | 102: "\f", | |
| 551 | 114: "\r" | |
| 552 | }; | |
| 553 | ||
| 554 | // Internal: Stores the parser state. | |
| 555 | var Index, Source; | |
| 556 | ||
| 557 | // Internal: Resets the parser state and throws a `SyntaxError`. | |
| 558 | var abort = function() { | |
| 559 | Index = Source = null; | |
| 560 | throw SyntaxError(); | |
| 561 | }; | |
| 562 | ||
| 563 | // Internal: Returns the next token, or `"$"` if the parser has reached | |
| 564 | // the end of the source string. A token may be a string, number, `null` | |
| 565 | // literal, or Boolean literal. | |
| 566 | var lex = function () { | |
| 567 | var source = Source, length = source.length, value, begin, position, isSigned, charCode; | |
| 568 | while (Index < length) { | |
| 569 | charCode = source.charCodeAt(Index); | |
| 570 | switch (charCode) { | |
| 571 | case 9: case 10: case 13: case 32: | |
| 572 | // Skip whitespace tokens, including tabs, carriage returns, line | |
| 573 | // feeds, and space characters. | |
| 574 | Index++; | |
| 575 | break; | |
| 576 | case 123: case 125: case 91: case 93: case 58: case 44: | |
| 577 | // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at | |
| 578 | // the current position. | |
| 579 | value = charIndexBuggy ? source.charAt(Index) : source[Index]; | |
| 580 | Index++; | |
| 581 | return value; | |
| 582 | case 34: | |
| 583 | // `"` delimits a JSON string; advance to the next character and | |
| 584 | // begin parsing the string. String tokens are prefixed with the | |
| 585 | // sentinel `@` character to distinguish them from punctuators and | |
| 586 | // end-of-string tokens. | |
| 587 | for (value = "@", Index++; Index < length;) { | |
| 588 | charCode = source.charCodeAt(Index); | |
| 589 | if (charCode < 32) { | |
| 590 | // Unescaped ASCII control characters (those with a code unit | |
| 591 | // less than the space character) are not permitted. | |
| 592 | abort(); | |
| 593 | } else if (charCode == 92) { | |
| 594 | // A reverse solidus (`\`) marks the beginning of an escaped | |
| 595 | // control character (including `"`, `\`, and `/`) or Unicode | |
| 596 | // escape sequence. | |
| 597 | charCode = source.charCodeAt(++Index); | |
| 598 | switch (charCode) { | |
| 599 | case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114: | |
| 600 | // Revive escaped control characters. | |
| 601 | value += Unescapes[charCode]; | |
| 602 | Index++; | |
| 603 | break; | |
| 604 | case 117: | |
| 605 | // `\u` marks the beginning of a Unicode escape sequence. | |
| 606 | // Advance to the first character and validate the | |
| 607 | // four-digit code point. | |
| 608 | begin = ++Index; | |
| 609 | for (position = Index + 4; Index < position; Index++) { | |
| 610 | charCode = source.charCodeAt(Index); | |
| 611 | // A valid sequence comprises four hexdigits (case- | |
| 612 | // insensitive) that form a single hexadecimal value. | |
| 613 | if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) { | |
| 614 | // Invalid Unicode escape sequence. | |
| 615 | abort(); | |
| 616 | } | |
| 617 | } | |
| 618 | // Revive the escaped character. | |
| 619 | value += fromCharCode("0x" + source.slice(begin, Index)); | |
| 620 | break; | |
| 621 | default: | |
| 622 | // Invalid escape sequence. | |
| 623 | abort(); | |
| 624 | } | |
| 625 | } else { | |
| 626 | if (charCode == 34) { | |
| 627 | // An unescaped double-quote character marks the end of the | |
| 628 | // string. | |
| 629 | break; | |
| 630 | } | |
| 631 | charCode = source.charCodeAt(Index); | |
| 632 | begin = Index; | |
| 633 | // Optimize for the common case where a string is valid. | |
| 634 | while (charCode >= 32 && charCode != 92 && charCode != 34) { | |
| 635 | charCode = source.charCodeAt(++Index); | |
| 636 | } | |
| 637 | // Append the string as-is. | |
| 638 | value += source.slice(begin, Index); | |
| 639 | } | |
| 640 | } | |
| 641 | if (source.charCodeAt(Index) == 34) { | |
| 642 | // Advance to the next character and return the revived string. | |
| 643 | Index++; | |
| 644 | return value; | |
| 645 | } | |
| 646 | // Unterminated string. | |
| 647 | abort(); | |
| 648 | default: | |
| 649 | // Parse numbers and literals. | |
| 650 | begin = Index; | |
| 651 | // Advance past the negative sign, if one is specified. | |
| 652 | if (charCode == 45) { | |
| 653 | isSigned = true; | |
| 654 | charCode = source.charCodeAt(++Index); | |
| 655 | } | |
| 656 | // Parse an integer or floating-point value. | |
| 657 | if (charCode >= 48 && charCode <= 57) { | |
| 658 | // Leading zeroes are interpreted as octal literals. | |
| 659 | if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) { | |
| 660 | // Illegal octal literal. | |
| 661 | abort(); | |
| 662 | } | |
| 663 | isSigned = false; | |
| 664 | // Parse the integer component. | |
| 665 | for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++); | |
| 666 | // Floats cannot contain a leading decimal point; however, this | |
| 667 | // case is already accounted for by the parser. | |
| 668 | if (source.charCodeAt(Index) == 46) { | |
| 669 | position = ++Index; | |
| 670 | // Parse the decimal component. | |
| 671 | for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++); | |
| 672 | if (position == Index) { | |
| 673 | // Illegal trailing decimal. | |
| 674 | abort(); | |
| 675 | } | |
| 676 | Index = position; | |
| 677 | } | |
| 678 | // Parse exponents. The `e` denoting the exponent is | |
| 679 | // case-insensitive. | |
| 680 | charCode = source.charCodeAt(Index); | |
| 681 | if (charCode == 101 || charCode == 69) { | |
| 682 | charCode = source.charCodeAt(++Index); | |
| 683 | // Skip past the sign following the exponent, if one is | |
| 684 | // specified. | |
| 685 | if (charCode == 43 || charCode == 45) { | |
| 686 | Index++; | |
| 687 | } | |
| 688 | // Parse the exponential component. | |
| 689 | for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++); | |
| 690 | if (position == Index) { | |
| 691 | // Illegal empty exponent. | |
| 692 | abort(); | |
| 693 | } | |
| 694 | Index = position; | |
| 695 | } | |
| 696 | // Coerce the parsed value to a JavaScript number. | |
| 697 | return +source.slice(begin, Index); | |
| 698 | } | |
| 699 | // A negative sign may only precede numbers. | |
| 700 | if (isSigned) { | |
| 701 | abort(); | |
| 702 | } | |
| 703 | // `true`, `false`, and `null` literals. | |
| 704 | if (source.slice(Index, Index + 4) == "true") { | |
| 705 | Index += 4; | |
| 706 | return true; | |
| 707 | } else if (source.slice(Index, Index + 5) == "false") { | |
| 708 | Index += 5; | |
| 709 | return false; | |
| 710 | } else if (source.slice(Index, Index + 4) == "null") { | |
| 711 | Index += 4; | |
| 712 | return null; | |
| 713 | } | |
| 714 | // Unrecognized token. | |
| 715 | abort(); | |
| 716 | } | |
| 717 | } | |
| 718 | // Return the sentinel `$` character if the parser has reached the end | |
| 719 | // of the source string. | |
| 720 | return "$"; | |
| 721 | }; | |
| 722 | ||
| 723 | // Internal: Parses a JSON `value` token. | |
| 724 | var get = function (value) { | |
| 725 | var results, hasMembers; | |
| 726 | if (value == "$") { | |
| 727 | // Unexpected end of input. | |
| 728 | abort(); | |
| 729 | } | |
| 730 | if (typeof value == "string") { | |
| 731 | if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") { | |
| 732 | // Remove the sentinel `@` character. | |
| 733 | return value.slice(1); | |
| 734 | } | |
| 735 | // Parse object and array literals. | |
| 736 | if (value == "[") { | |
| 737 | // Parses a JSON array, returning a new JavaScript array. | |
| 738 | results = []; | |
| 739 | for (;; hasMembers || (hasMembers = true)) { | |
| 740 | value = lex(); | |
| 741 | // A closing square bracket marks the end of the array literal. | |
| 742 | if (value == "]") { | |
| 743 | break; | |
| 744 | } | |
| 745 | // If the array literal contains elements, the current token | |
| 746 | // should be a comma separating the previous element from the | |
| 747 | // next. | |
| 748 | if (hasMembers) { | |
| 749 | if (value == ",") { | |
| 750 | value = lex(); | |
| 751 | if (value == "]") { | |
| 752 | // Unexpected trailing `,` in array literal. | |
| 753 | abort(); | |
| 754 | } | |
| 755 | } else { | |
| 756 | // A `,` must separate each array element. | |
| 757 | abort(); | |
| 758 | } | |
| 759 | } | |
| 760 | // Elisions and leading commas are not permitted. | |
| 761 | if (value == ",") { | |
| 762 | abort(); | |
| 763 | } | |
| 764 | results.push(get(value)); | |
| 765 | } | |
| 766 | return results; | |
| 767 | } else if (value == "{") { | |
| 768 | // Parses a JSON object, returning a new JavaScript object. | |
| 769 | results = {}; | |
| 770 | for (;; hasMembers || (hasMembers = true)) { | |
| 771 | value = lex(); | |
| 772 | // A closing curly brace marks the end of the object literal. | |
| 773 | if (value == "}") { | |
| 774 | break; | |
| 775 | } | |
| 776 | // If the object literal contains members, the current token | |
| 777 | // should be a comma separator. | |
| 778 | if (hasMembers) { | |
| 779 | if (value == ",") { | |
| 780 | value = lex(); | |
| 781 | if (value == "}") { | |
| 782 | // Unexpected trailing `,` in object literal. | |
| 783 | abort(); | |
| 784 | } | |
| 785 | } else { | |
| 786 | // A `,` must separate each object member. | |
| 787 | abort(); | |
| 788 | } | |
| 789 | } | |
| 790 | // Leading commas are not permitted, object property names must be | |
| 791 | // double-quoted strings, and a `:` must separate each property | |
| 792 | // name and value. | |
| 793 | if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") { | |
| 794 | abort(); | |
| 795 | } | |
| 796 | results[value.slice(1)] = get(lex()); | |
| 797 | } | |
| 798 | return results; | |
| 799 | } | |
| 800 | // Unexpected token encountered. | |
| 801 | abort(); | |
| 802 | } | |
| 803 | return value; | |
| 804 | }; | |
| 805 | ||
| 806 | // Internal: Updates a traversed object member. | |
| 807 | var update = function(source, property, callback) { | |
| 808 | var element = walk(source, property, callback); | |
| 809 | if (element === undef) { | |
| 810 | delete source[property]; | |
| 811 | } else { | |
| 812 | source[property] = element; | |
| 813 | } | |
| 814 | }; | |
| 815 | ||
| 816 | // Internal: Recursively traverses a parsed JSON object, invoking the | |
| 817 | // `callback` function for each value. This is an implementation of the | |
| 818 | // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2. | |
| 819 | var walk = function (source, property, callback) { | |
| 820 | var value = source[property], length; | |
| 821 | if (typeof value == "object" && value) { | |
| 822 | // `forEach` can't be used to traverse an array in Opera <= 8.54 | |
| 823 | // because its `Object#hasOwnProperty` implementation returns `false` | |
| 824 | // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`). | |
| 825 | if (getClass.call(value) == arrayClass) { | |
| 826 | for (length = value.length; length--;) { | |
| 827 | update(value, length, callback); | |
| 828 | } | |
| 829 | } else { | |
| 830 | forEach(value, function (property) { | |
| 831 | update(value, property, callback); | |
| 832 | }); | |
| 833 | } | |
| 834 | } | |
| 835 | return callback.call(source, property, value); | |
| 836 | }; | |
| 837 | ||
| 838 | // Public: `JSON.parse`. See ES 5.1 section 15.12.2. | |
| 839 | JSON3.parse = function (source, callback) { | |
| 840 | var result, value; | |
| 841 | Index = 0; | |
| 842 | Source = "" + source; | |
| 843 | result = get(lex()); | |
| 844 | // If a JSON string contains multiple tokens, it is invalid. | |
| 845 | if (lex() != "$") { | |
| 846 | abort(); | |
| 847 | } | |
| 848 | // Reset the parser state. | |
| 849 | Index = Source = null; | |
| 850 | return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result; | |
| 851 | }; | |
| 852 | } | |
| 853 | } | |
| 854 | ||
| 855 | // Export for asynchronous module loaders. | |
| 856 | if (isLoader) { | |
| 857 | define(function () { | |
| 858 | return JSON3; | |
| 859 | }); | |
| 860 | } | |
| 861 | }(this)); | |
