services/sync/tps/extensions/mozmill/resource/stdlib/json2.js@4ab42b5ab56c
services/sync/tps/extensions/mozmill/resource/stdlib/json2.js
Wed, 31 Dec 2014 07:53:36 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 07:53:36 +0100
- branch
- TOR_BUG_3246
- changeset 5
- 4ab42b5ab56c
- permissions
- -rw-r--r--
Correct small whitespace inconsistency, lost while renaming variables.
1 /*
2 http://www.JSON.org/json2.js
3 2008-05-25
5 Public Domain.
7 NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
9 See http://www.JSON.org/js.html
11 This file creates a global JSON object containing two methods: stringify
12 and parse.
14 JSON.stringify(value, replacer, space)
15 value any JavaScript value, usually an object or array.
17 replacer an optional parameter that determines how object
18 values are stringified for objects without a toJSON
19 method. It can be a function or an array.
21 space an optional parameter that specifies the indentation
22 of nested structures. If it is omitted, the text will
23 be packed without extra whitespace. If it is a number,
24 it will specify the number of spaces to indent at each
25 level. If it is a string (such as '\t' or ' '),
26 it contains the characters used to indent at each level.
28 This method produces a JSON text from a JavaScript value.
30 When an object value is found, if the object contains a toJSON
31 method, its toJSON method will be called and the result will be
32 stringified. A toJSON method does not serialize: it returns the
33 value represented by the name/value pair that should be serialized,
34 or undefined if nothing should be serialized. The toJSON method
35 will be passed the key associated with the value, and this will be
36 bound to the object holding the key.
38 For example, this would serialize Dates as ISO strings.
40 Date.prototype.toJSON = function (key) {
41 function f(n) {
42 // Format integers to have at least two digits.
43 return n < 10 ? '0' + n : n;
44 }
46 return this.getUTCFullYear() + '-' +
47 f(this.getUTCMonth() + 1) + '-' +
48 f(this.getUTCDate()) + 'T' +
49 f(this.getUTCHours()) + ':' +
50 f(this.getUTCMinutes()) + ':' +
51 f(this.getUTCSeconds()) + 'Z';
52 };
54 You can provide an optional replacer method. It will be passed the
55 key and value of each member, with this bound to the containing
56 object. The value that is returned from your method will be
57 serialized. If your method returns undefined, then the member will
58 be excluded from the serialization.
60 If the replacer parameter is an array, then it will be used to
61 select the members to be serialized. It filters the results such
62 that only members with keys listed in the replacer array are
63 stringified.
65 Values that do not have JSON representations, such as undefined or
66 functions, will not be serialized. Such values in objects will be
67 dropped; in arrays they will be replaced with null. You can use
68 a replacer function to replace those with JSON values.
69 JSON.stringify(undefined) returns undefined.
71 The optional space parameter produces a stringification of the
72 value that is filled with line breaks and indentation to make it
73 easier to read.
75 If the space parameter is a non-empty string, then that string will
76 be used for indentation. If the space parameter is a number, then
77 the indentation will be that many spaces.
79 Example:
81 text = JSON.stringify(['e', {pluribus: 'unum'}]);
82 // text is '["e",{"pluribus":"unum"}]'
85 text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
86 // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
88 text = JSON.stringify([new Date()], function (key, value) {
89 return this[key] instanceof Date ?
90 'Date(' + this[key] + ')' : value;
91 });
92 // text is '["Date(---current time---)"]'
95 JSON.parse(text, reviver)
96 This method parses a JSON text to produce an object or array.
97 It can throw a SyntaxError exception.
99 The optional reviver parameter is a function that can filter and
100 transform the results. It receives each of the keys and values,
101 and its return value is used instead of the original value.
102 If it returns what it received, then the structure is not modified.
103 If it returns undefined then the member is deleted.
105 Example:
107 // Parse the text. Values that look like ISO date strings will
108 // be converted to Date objects.
110 myData = JSON.parse(text, function (key, value) {
111 var a;
112 if (typeof value === 'string') {
113 a =
114 /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
115 if (a) {
116 return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
117 +a[5], +a[6]));
118 }
119 }
120 return value;
121 });
123 myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
124 var d;
125 if (typeof value === 'string' &&
126 value.slice(0, 5) === 'Date(' &&
127 value.slice(-1) === ')') {
128 d = new Date(value.slice(5, -1));
129 if (d) {
130 return d;
131 }
132 }
133 return value;
134 });
137 This is a reference implementation. You are free to copy, modify, or
138 redistribute.
140 This code should be minified before deployment.
141 See http://javascript.crockford.com/jsmin.html
143 USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
144 NOT CONTROL.
145 */
147 /*jslint evil: true */
149 /*global JSON */
151 /*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", call,
152 charCodeAt, getUTCDate, getUTCFullYear, getUTCHours, getUTCMinutes,
153 getUTCMonth, getUTCSeconds, hasOwnProperty, join, lastIndex, length,
154 parse, propertyIsEnumerable, prototype, push, replace, slice, stringify,
155 test, toJSON, toString
156 */
158 var EXPORTED_SYMBOLS = ["JSON"];
160 // Create a JSON object only if one does not already exist. We create the
161 // object in a closure to avoid creating global variables.
163 JSON = function () {
165 function f(n) {
166 // Format integers to have at least two digits.
167 return n < 10 ? '0' + n : n;
168 }
170 Date.prototype.toJSON = function (key) {
172 return this.getUTCFullYear() + '-' +
173 f(this.getUTCMonth() + 1) + '-' +
174 f(this.getUTCDate()) + 'T' +
175 f(this.getUTCHours()) + ':' +
176 f(this.getUTCMinutes()) + ':' +
177 f(this.getUTCSeconds()) + 'Z';
178 };
180 var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
181 escapeable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
182 gap,
183 indent,
184 meta = { // table of character substitutions
185 '\b': '\\b',
186 '\t': '\\t',
187 '\n': '\\n',
188 '\f': '\\f',
189 '\r': '\\r',
190 '"' : '\\"',
191 '\\': '\\\\'
192 },
193 rep;
196 function quote(string) {
198 // If the string contains no control characters, no quote characters, and no
199 // backslash characters, then we can safely slap some quotes around it.
200 // Otherwise we must also replace the offending characters with safe escape
201 // sequences.
203 escapeable.lastIndex = 0;
204 return escapeable.test(string) ?
205 '"' + string.replace(escapeable, function (a) {
206 var c = meta[a];
207 if (typeof c === 'string') {
208 return c;
209 }
210 return '\\u' + ('0000' +
211 (+(a.charCodeAt(0))).toString(16)).slice(-4);
212 }) + '"' :
213 '"' + string + '"';
214 }
217 function str(key, holder) {
219 // Produce a string from holder[key].
221 var i, // The loop counter.
222 k, // The member key.
223 v, // The member value.
224 length,
225 mind = gap,
226 partial,
227 value = holder[key];
229 // If the value has a toJSON method, call it to obtain a replacement value.
231 if (value && typeof value === 'object' &&
232 typeof value.toJSON === 'function') {
233 value = value.toJSON(key);
234 }
236 // If we were called with a replacer function, then call the replacer to
237 // obtain a replacement value.
239 if (typeof rep === 'function') {
240 value = rep.call(holder, key, value);
241 }
243 // What happens next depends on the value's type.
245 switch (typeof value) {
246 case 'string':
247 return quote(value);
249 case 'number':
251 // JSON numbers must be finite. Encode non-finite numbers as null.
253 return isFinite(value) ? String(value) : 'null';
255 case 'boolean':
256 case 'null':
258 // If the value is a boolean or null, convert it to a string. Note:
259 // typeof null does not produce 'null'. The case is included here in
260 // the remote chance that this gets fixed someday.
262 return String(value);
264 // If the type is 'object', we might be dealing with an object or an array or
265 // null.
267 case 'object':
269 // Due to a specification blunder in ECMAScript, typeof null is 'object',
270 // so watch out for that case.
272 if (!value) {
273 return 'null';
274 }
276 // Make an array to hold the partial results of stringifying this object value.
278 gap += indent;
279 partial = [];
281 // If the object has a dontEnum length property, we'll treat it as an array.
283 if (typeof value.length === 'number' &&
284 !(value.propertyIsEnumerable('length'))) {
286 // The object is an array. Stringify every element. Use null as a placeholder
287 // for non-JSON values.
289 length = value.length;
290 for (i = 0; i < length; i += 1) {
291 partial[i] = str(i, value) || 'null';
292 }
294 // Join all of the elements together, separated with commas, and wrap them in
295 // brackets.
297 v = partial.length === 0 ? '[]' :
298 gap ? '[\n' + gap +
299 partial.join(',\n' + gap) + '\n' +
300 mind + ']' :
301 '[' + partial.join(',') + ']';
302 gap = mind;
303 return v;
304 }
306 // If the replacer is an array, use it to select the members to be stringified.
308 if (rep && typeof rep === 'object') {
309 length = rep.length;
310 for (i = 0; i < length; i += 1) {
311 k = rep[i];
312 if (typeof k === 'string') {
313 v = str(k, value, rep);
314 if (v) {
315 partial.push(quote(k) + (gap ? ': ' : ':') + v);
316 }
317 }
318 }
319 } else {
321 // Otherwise, iterate through all of the keys in the object.
323 for (k in value) {
324 if (Object.hasOwnProperty.call(value, k)) {
325 v = str(k, value, rep);
326 if (v) {
327 partial.push(quote(k) + (gap ? ': ' : ':') + v);
328 }
329 }
330 }
331 }
333 // Join all of the member texts together, separated with commas,
334 // and wrap them in braces.
336 v = partial.length === 0 ? '{}' :
337 gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
338 mind + '}' : '{' + partial.join(',') + '}';
339 gap = mind;
340 return v;
341 }
342 }
344 // Return the JSON object containing the stringify and parse methods.
346 return {
347 stringify: function (value, replacer, space) {
349 // The stringify method takes a value and an optional replacer, and an optional
350 // space parameter, and returns a JSON text. The replacer can be a function
351 // that can replace values, or an array of strings that will select the keys.
352 // A default replacer method can be provided. Use of the space parameter can
353 // produce text that is more easily readable.
355 var i;
356 gap = '';
357 indent = '';
359 // If the space parameter is a number, make an indent string containing that
360 // many spaces.
362 if (typeof space === 'number') {
363 for (i = 0; i < space; i += 1) {
364 indent += ' ';
365 }
367 // If the space parameter is a string, it will be used as the indent string.
369 } else if (typeof space === 'string') {
370 indent = space;
371 }
373 // If there is a replacer, it must be a function or an array.
374 // Otherwise, throw an error.
376 rep = replacer;
377 if (replacer && typeof replacer !== 'function' &&
378 (typeof replacer !== 'object' ||
379 typeof replacer.length !== 'number')) {
380 throw new Error('JSON.stringify');
381 }
383 // Make a fake root object containing our value under the key of ''.
384 // Return the result of stringifying the value.
386 return str('', {'': value});
387 },
390 parse: function (text, reviver) {
392 // The parse method takes a text and an optional reviver function, and returns
393 // a JavaScript value if the text is a valid JSON text.
395 var j;
397 function walk(holder, key) {
399 // The walk method is used to recursively walk the resulting structure so
400 // that modifications can be made.
402 var k, v, value = holder[key];
403 if (value && typeof value === 'object') {
404 for (k in value) {
405 if (Object.hasOwnProperty.call(value, k)) {
406 v = walk(value, k);
407 if (v !== undefined) {
408 value[k] = v;
409 } else {
410 delete value[k];
411 }
412 }
413 }
414 }
415 return reviver.call(holder, key, value);
416 }
419 // Parsing happens in four stages. In the first stage, we replace certain
420 // Unicode characters with escape sequences. JavaScript handles many characters
421 // incorrectly, either silently deleting them, or treating them as line endings.
423 cx.lastIndex = 0;
424 if (cx.test(text)) {
425 text = text.replace(cx, function (a) {
426 return '\\u' + ('0000' +
427 (+(a.charCodeAt(0))).toString(16)).slice(-4);
428 });
429 }
431 // In the second stage, we run the text against regular expressions that look
432 // for non-JSON patterns. We are especially concerned with '()' and 'new'
433 // because they can cause invocation, and '=' because it can cause mutation.
434 // But just to be safe, we want to reject all unexpected forms.
436 // We split the second stage into 4 regexp operations in order to work around
437 // crippling inefficiencies in IE's and Safari's regexp engines. First we
438 // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
439 // replace all simple value tokens with ']' characters. Third, we delete all
440 // open brackets that follow a colon or comma or that begin the text. Finally,
441 // we look to see that the remaining characters are only whitespace or ']' or
442 // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
444 if (/^[\],:{}\s]*$/.
445 test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
446 replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
447 replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
449 // In the third stage we use the eval function to compile the text into a
450 // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
451 // in JavaScript: it can begin a block or an object literal. We wrap the text
452 // in parens to eliminate the ambiguity.
454 j = eval('(' + text + ')');
456 // In the optional fourth stage, we recursively walk the new structure, passing
457 // each name/value pair to a reviver function for possible transformation.
459 return typeof reviver === 'function' ?
460 walk({'': j}, '') : j;
461 }
463 // If the text is not JSON parseable, then a SyntaxError is thrown.
465 throw new SyntaxError('JSON.parse');
466 }
467 };
468 }();
