https://mineraltown.com/json2.js

1/*
2json2.js
32014-02-04
4
5Public Domain.
6
7NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
8
9See http://www.JSON.org/js.html
10
11
12This code should be minified before deployment.
13See http://javascript.crockford.com/jsmin.html
14
15USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
16NOT CONTROL.
17
18
19This file creates a global JSON object containing two methods: stringify
20and parse.
21
22JSON.stringify(value, replacer, space)
23value   any JavaScript value, usually an object or array.
24
25replaceran optional parameter that determines how object
26values are stringified for objects. It can be a
27function or an array of strings.
28
29space   an optional parameter that specifies the indentation
30of nested structures. If it is omitted, the text will
31be packed without extra whitespace. If it is a number,
32it will specify the number of spaces to indent at each
33level. If it is a string (such as '\t' or ' '),
34it contains the characters used to indent at each level.
35
36This method produces a JSON text from a JavaScript value.
37
38When an object value is found, if the object contains a toJSON
39method, its toJSON method will be called and the result will be
40stringified. A toJSON method does not serialize: it returns the
41value represented by the name/value pair that should be serialized,
42or undefined if nothing should be serialized. The toJSON method
43will be passed the key associated with the value, and this will be
44bound to the value
45
46For example, this would serialize Dates as ISO strings.
47
48Date.prototype.toJSON = function (key) {
49function f(n) {
50// Format integers to have at least two digits.
51return n < 10 ? '0' + n : n;
52}
53
54return this.getUTCFullYear()   + '-' +
55 f(this.getUTCMonth() + 1) + '-' +
56 f(this.getUTCDate())  + 'T' +
57 f(this.getUTCHours()) + ':' +
58 f(this.getUTCMinutes())   + ':' +
59 f(this.getUTCSeconds())   + 'Z';
60};
61
62You can provide an optional replacer method. It will be passed the
63key and value of each member, with this bound to the containing
64object. The value that is returned from your method will be
65serialized. If your method returns undefined, then the member will
66be excluded from the serialization.
67
68If the replacer parameter is an array of strings, then it will be
69used to select the members to be serialized. It filters the results
70such that only members with keys listed in the replacer array are
71stringified.
72
73Values that do not have JSON representations, such as undefined or
74functions, will not be serialized. Such values in objects will be
75dropped; in arrays they will be replaced with null. You can use
76a replacer function to replace those with JSON values.
77JSON.stringify(undefined) returns undefined.
78
79The optional space parameter produces a stringification of the
80value that is filled with line breaks and indentation to make it
81easier to read.
82
83If the space parameter is a non-empty string, then that string will
84be used for indentation. If the space parameter is a number, then
85the indentation will be that many spaces.
86
87Example:
88
89text = JSON.stringify(['e', {pluribus: 'unum'}]);
90// text is '["e",{"pluribus":"unum"}]'
91
92
93text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
94// text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
95
96text = JSON.stringify([new Date()], function (key, value) {
97return this[key] instanceof Date ?
98'Date(' + this[key] + ')' : value;
99});
100// text is '["Date(---current time---)"]'
101
102
103JSON.parse(text, reviver)
104This method parses a JSON text to produce an object or array.
105It can throw a SyntaxError exception.
106
107The optional reviver parameter is a function that can filter and
108transform the results. It receives each of the keys and values,
109and its return value is used instead of the original value.
110If it returns what it received, then the structure is not modified.
111If it returns undefined then the member is deleted.
112
113Example:
114
115// Parse the text. Values that look like ISO date strings will
116// be converted to Date objects.
117
118myData = JSON.parse(text, function (key, value) {
119var a;
120if (typeof value === 'string') {
121a =
122/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
123if (a) {
124return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
125+a[5], +a[6]));
126}
127}
128return value;
129});
130
131myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
132var d;
133if (typeof value === 'string' &&
134value.slice(0, 5) === 'Date(' &&
135value.slice(-1) === ')') {
136d = new Date(value.slice(5, -1));
137if (d) {
138return d;
139}
140}
141return value;
142});
143
144
145This is a reference implementation. You are free to copy, modify, or
146redistribute.
147*/
148
149/*jslint evil: true, regexp: true */
150
151/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
152call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
153getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
154lastIndex, length, parse, prototype, push, replace, slice, stringify,
155test, toJSON, toString, valueOf
156*/
157
158
159// Create a JSON object only if one does not already exist. We create the
160// methods in a closure to avoid creating global variables.
161
162if (typeof JSON !== 'object') {
163JSON = {};
164}
165
166(function () {
167'use strict';
168
169function f(n) {
170// Format integers to have at least two digits.
171return n < 10 ? '0' + n : n;
172}
173
174if (typeof Date.prototype.toJSON !== 'function') {
175
176Date.prototype.toJSON = function () {
177
178return isFinite(this.valueOf())
179? this.getUTCFullYear() + '-' +
180f(this.getUTCMonth() + 1) + '-' +
181f(this.getUTCDate())  + 'T' +
182f(this.getUTCHours()) + ':' +
183f(this.getUTCMinutes())   + ':' +
184f(this.getUTCSeconds())   + 'Z'
185: null;
186};
187
188String.prototype.toJSON  =
189Number.prototype.toJSON  =
190Boolean.prototype.toJSON = function () {
191return this.valueOf();
192};
193}
194
195var cx,
196escapable,
197gap,
198indent,
199meta,
200rep;
201
202
203function quote(string) {
204
205// If the string contains no control characters, no quote characters, and no
206// backslash characters, then we can safely slap some quotes around it.
207// Otherwise we must also replace the offending characters with safe escape
208// sequences.
209
210escapable.lastIndex = 0;
211return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
212var c = meta[a];
213return typeof c === 'string'
214? c
215: '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
216}) + '"' : '"' + string + '"';
217}
218
219
220function str(key, holder) {
221
222// Produce a string from holder[key].
223
224var i,  // The loop counter.
225k,  // The member key.
226v,  // The member value.
227length,
228mind = gap,
229partial,
230value = holder[key];
231
232// If the value has a toJSON method, call it to obtain a replacement value.
233
234if (value && typeof value === 'object' &&
235typeof value.toJSON === 'function') {
236value = value.toJSON(key);
237}
238
239// If we were called with a replacer function, then call the replacer to
240// obtain a replacement value.
241
242if (typeof rep === 'function') {
243value = rep.call(holder, key, value);
244}
245
246// What happens next depends on the value's type.
247
248switch (typeof value) {
249case 'string':
250return quote(value);
251
252case 'number':
253
254// JSON numbers must be finite. Encode non-finite numbers as null.
255
256return isFinite(value) ? String(value) : 'null';
257
258case 'boolean':
259case 'null':
260
261// If the value is a boolean or null, convert it to a string. Note:
262// typeof null does not produce 'null'. The case is included here in
263// the remote chance that this gets fixed someday.
264
265return String(value);
266
267// If the type is 'object', we might be dealing with an object or an array or
268// null.
269
270case 'object':
271
272// Due to a specification blunder in ECMAScript, typeof null is 'object',
273// so watch out for that case.
274
275if (!value) {
276return 'null';
277}
278
279// Make an array to hold the partial results of stringifying this object value.
280
281gap += indent;
282partial = [];
283
284// Is the value an array?
285
286if (Object.prototype.toString.apply(value) === '[object Array]') {
287
288// The value is an array. Stringify every element. Use null as a placeholder
289// for non-JSON values.
290
291length = value.length;
292for (i = 0; i < length; i += 1) {
293partial[i] = str(i, value) || 'null';
294}
295
296// Join all of the elements together, separated with commas, and wrap them in
297// brackets.
298
299v = partial.length === 0
300? '[]'
301: gap
302? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
303: '[' + partial.join(',') + ']';
304gap = mind;
305return v;
306}
307
308// If the replacer is an array, use it to select the members to be stringified.
309
310if (rep && typeof rep === 'object') {
311length = rep.length;
312for (i = 0; i < length; i += 1) {
313if (typeof rep[i] === 'string') {
314k = rep[i];
315v = str(k, value);
316if (v) {
317partial.push(quote(k) + (gap ? ': ' : ':') + v);
318}
319}
320}
321} else {
322
323// Otherwise, iterate through all of the keys in the object.
324
325for (k in value) {
326if (Object.prototype.hasOwnProperty.call(value, k)) {
327v = str(k, value);
328if (v) {
329partial.push(quote(k) + (gap ? ': ' : ':') + v);
330}
331}
332}
333}
334
335// Join all of the member texts together, separated with commas,
336// and wrap them in braces.
337
338v = partial.length === 0
339? '{}'
340: gap
341? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
342: '{' + partial.join(',') + '}';
343gap = mind;
344return v;
345}
346}
347
348// If the JSON object does not yet have a stringify method, give it one.
349
350if (typeof JSON.stringify !== 'function') {
351escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
352meta = {// table of character substitutions
353'\b': '\\b',
354'\t': '\\t',
355'\n': '\\n',
356'\f': '\\f',
357'\r': '\\r',
358'"' : '\\"',
359'\\': '\\\\'
360};
361JSON.stringify = function (value, replacer, space) {
362
363// The stringify method takes a value and an optional replacer, and an optional
364// space parameter, and returns a JSON text. The replacer can be a function
365// that can replace values, or an array of strings that will select the keys.
366// A default replacer method can be provided. Use of the space parameter can
367// produce text that is more easily readable.
368
369var i;
370gap = '';
371indent = '';
372
373// If the space parameter is a number, make an indent string containing that
374// many spaces.
375
376if (typeof space === 'number') {
377for (i = 0; i < space; i += 1) {
378indent += ' ';
379}
380
381// If the space parameter is a string, it will be used as the indent string.
382
383} else if (typeof space === 'string') {
384indent = space;
385}
386
387// If there is a replacer, it must be a function or an array.
388// Otherwise, throw an error.
389
390rep = replacer;
391if (replacer && typeof replacer !== 'function' &&
392(typeof replacer !== 'object' ||
393typeof replacer.length !== 'number')) {
394throw new Error('JSON.stringify');
395}
396
397// Make a fake root object containing our value under the key of ''.
398// Return the result of stringifying the value.
399
400return str('', {'': value});
401};
402}
403
404
405// If the JSON object does not yet have a parse method, give it one.
406
407if (typeof JSON.parse !== 'function') {
408cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
409JSON.parse = function (text, reviver) {
410
411// The parse method takes a text and an optional reviver function, and returns
412// a JavaScript value if the text is a valid JSON text.
413
414var j;
415
416function walk(holder, key) {
417
418// The walk method is used to recursively walk the resulting structure so
419// that modifications can be made.
420
421var k, v, value = holder[key];
422if (value && typeof value === 'object') {
423for (k in value) {
424if (Object.prototype.hasOwnProperty.call(value, k)) {
425v = walk(value, k);
426if (v !== undefined) {
427value[k] = v;
428} else {
429delete value[k];
430}
431}
432}
433}
434return reviver.call(holder, key, value);
435}
436
437
438// Parsing happens in four stages. In the first stage, we replace certain
439// Unicode characters with escape sequences. JavaScript handles many characters
440// incorrectly, either silently deleting them, or treating them as line endings.
441
442text = String(text);
443cx.lastIndex = 0;
444if (cx.test(text)) {
445text = text.replace(cx, function (a) {
446return '\\u' +
447('0000' + a.charCodeAt(0).toString(16)).slice(-4);
448});
449}
450
451// In the second stage, we run the text against regular expressions that look
452// for non-JSON patterns. We are especially concerned with '()' and 'new'
453// because they can cause invocation, and '=' because it can cause mutation.
454// But just to be safe, we want to reject all unexpected forms.
455
456// We split the second stage into 4 regexp operations in order to work around
457// crippling inefficiencies in IE's and Safari's regexp engines. First we
458// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
459// replace all simple value tokens with ']' characters. Third, we delete all
460// open brackets that follow a colon or comma or that begin the text. Finally,
461// we look to see that the remaining characters are only whitespace or ']' or
462// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
463
464if (/^[\],:{}\s]*$/
465.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
466.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
467.replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
468
469// In the third stage we use the eval function to compile the text into a
470// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
471// in JavaScript: it can begin a block or an object literal. We wrap the text
472// in parens to eliminate the ambiguity.
473
474j = eval('(' + text + ')');
475
476// In the optional fourth stage, we recursively walk the new structure, passing
477// each name/value pair to a reviver function for possible transformation.
478
479return typeof reviver === 'function'
480? walk({'': j}, '')
481: j;
482}
483
484// If the text is not JSON parseable, then a SyntaxError is thrown.
485
486throw new SyntaxError('JSON.parse');
487};
488}
489}());