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/static/scripts/json2.js

https://bitbucket.org/cistrome/cistrome-harvard/
JavaScript | 480 lines | 311 code | 12 blank | 157 comment | 2 complexity | 74d903049683e5bbea9ccb7544a42bca MD5 | raw file
  1/*
  2    http://www.JSON.org/json2.js
  3    2011-02-23
  4
  5    Public Domain.
  6
  7    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
  8
  9    See http://www.JSON.org/js.html
 10
 11
 12    This code should be minified before deployment.
 13    See http://javascript.crockford.com/jsmin.html
 14
 15    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
 16    NOT CONTROL.
 17
 18
 19    This file creates a global JSON object containing two methods: stringify
 20    and parse.
 21
 22        JSON.stringify(value, replacer, space)
 23            value       any JavaScript value, usually an object or array.
 24
 25            replacer    an optional parameter that determines how object
 26                        values are stringified for objects. It can be a
 27                        function or an array of strings.
 28
 29            space       an optional parameter that specifies the indentation
 30                        of nested structures. If it is omitted, the text will
 31                        be packed without extra whitespace. If it is a number,
 32                        it will specify the number of spaces to indent at each
 33                        level. If it is a string (such as '\t' or ' '),
 34                        it contains the characters used to indent at each level.
 35
 36            This method produces a JSON text from a JavaScript value.
 37
 38            When an object value is found, if the object contains a toJSON
 39            method, its toJSON method will be called and the result will be
 40            stringified. A toJSON method does not serialize: it returns the
 41            value represented by the name/value pair that should be serialized,
 42            or undefined if nothing should be serialized. The toJSON method
 43            will be passed the key associated with the value, and this will be
 44            bound to the value
 45
 46            For example, this would serialize Dates as ISO strings.
 47
 48                Date.prototype.toJSON = function (key) {
 49                    function f(n) {
 50                        // Format integers to have at least two digits.
 51                        return n < 10 ? '0' + n : n;
 52                    }
 53
 54                    return 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
 62            You can provide an optional replacer method. It will be passed the
 63            key and value of each member, with this bound to the containing
 64            object. The value that is returned from your method will be
 65            serialized. If your method returns undefined, then the member will
 66            be excluded from the serialization.
 67
 68            If the replacer parameter is an array of strings, then it will be
 69            used to select the members to be serialized. It filters the results
 70            such that only members with keys listed in the replacer array are
 71            stringified.
 72
 73            Values that do not have JSON representations, such as undefined or
 74            functions, will not be serialized. Such values in objects will be
 75            dropped; in arrays they will be replaced with null. You can use
 76            a replacer function to replace those with JSON values.
 77            JSON.stringify(undefined) returns undefined.
 78
 79            The optional space parameter produces a stringification of the
 80            value that is filled with line breaks and indentation to make it
 81            easier to read.
 82
 83            If the space parameter is a non-empty string, then that string will
 84            be used for indentation. If the space parameter is a number, then
 85            the indentation will be that many spaces.
 86
 87            Example:
 88
 89            text = JSON.stringify(['e', {pluribus: 'unum'}]);
 90            // text is '["e",{"pluribus":"unum"}]'
 91
 92
 93            text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
 94            // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
 95
 96            text = JSON.stringify([new Date()], function (key, value) {
 97                return this[key] instanceof Date ?
 98                    'Date(' + this[key] + ')' : value;
 99            });
100            // text is '["Date(---current time---)"]'
101
102
103        JSON.parse(text, reviver)
104            This method parses a JSON text to produce an object or array.
105            It can throw a SyntaxError exception.
106
107            The optional reviver parameter is a function that can filter and
108            transform the results. It receives each of the keys and values,
109            and its return value is used instead of the original value.
110            If it returns what it received, then the structure is not modified.
111            If it returns undefined then the member is deleted.
112
113            Example:
114
115            // Parse the text. Values that look like ISO date strings will
116            // be converted to Date objects.
117
118            myData = JSON.parse(text, function (key, value) {
119                var a;
120                if (typeof value === 'string') {
121                    a =
122/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
123                    if (a) {
124                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
125                            +a[5], +a[6]));
126                    }
127                }
128                return value;
129            });
130
131            myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
132                var d;
133                if (typeof value === 'string' &&
134                        value.slice(0, 5) === 'Date(' &&
135                        value.slice(-1) === ')') {
136                    d = new Date(value.slice(5, -1));
137                    if (d) {
138                        return d;
139                    }
140                }
141                return value;
142            });
143
144
145    This is a reference implementation. You are free to copy, modify, or
146    redistribute.
147*/
148
149/*jslint evil: true, strict: false, regexp: false */
150
151/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
152    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
153    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
154    lastIndex, length, parse, prototype, push, replace, slice, stringify,
155    test, 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
162var JSON;
163if (!JSON) {
164    JSON = {};
165}
166
167(function () {
168    "use strict";
169
170    function f(n) {
171        // Format integers to have at least two digits.
172        return n < 10 ? '0' + n : n;
173    }
174
175    if (typeof Date.prototype.toJSON !== 'function') {
176
177        Date.prototype.toJSON = function (key) {
178
179            return isFinite(this.valueOf()) ?
180                this.getUTCFullYear()     + '-' +
181                f(this.getUTCMonth() + 1) + '-' +
182                f(this.getUTCDate())      + 'T' +
183                f(this.getUTCHours())     + ':' +
184                f(this.getUTCMinutes())   + ':' +
185                f(this.getUTCSeconds())   + 'Z' : null;
186        };
187
188        String.prototype.toJSON      =
189            Number.prototype.toJSON  =
190            Boolean.prototype.toJSON = function (key) {
191                return this.valueOf();
192            };
193    }
194
195    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
196        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
197        gap,
198        indent,
199        meta = {    // table of character substitutions
200            '\b': '\\b',
201            '\t': '\\t',
202            '\n': '\\n',
203            '\f': '\\f',
204            '\r': '\\r',
205            '"' : '\\"',
206            '\\': '\\\\'
207        },
208        rep;
209
210
211    function quote(string) {
212
213// If the string contains no control characters, no quote characters, and no
214// backslash characters, then we can safely slap some quotes around it.
215// Otherwise we must also replace the offending characters with safe escape
216// sequences.
217
218        escapable.lastIndex = 0;
219        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
220            var c = meta[a];
221            return typeof c === 'string' ? c :
222                '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
223        }) + '"' : '"' + string + '"';
224    }
225
226
227    function str(key, holder) {
228
229// Produce a string from holder[key].
230
231        var i,          // The loop counter.
232            k,          // The member key.
233            v,          // The member value.
234            length,
235            mind = gap,
236            partial,
237            value = holder[key];
238
239// If the value has a toJSON method, call it to obtain a replacement value.
240
241        if (value && typeof value === 'object' &&
242                typeof value.toJSON === 'function') {
243            value = value.toJSON(key);
244        }
245
246// If we were called with a replacer function, then call the replacer to
247// obtain a replacement value.
248
249        if (typeof rep === 'function') {
250            value = rep.call(holder, key, value);
251        }
252
253// What happens next depends on the value's type.
254
255        switch (typeof value) {
256        case 'string':
257            return quote(value);
258
259        case 'number':
260
261// JSON numbers must be finite. Encode non-finite numbers as null.
262
263            return isFinite(value) ? String(value) : 'null';
264
265        case 'boolean':
266        case 'null':
267
268// If the value is a boolean or null, convert it to a string. Note:
269// typeof null does not produce 'null'. The case is included here in
270// the remote chance that this gets fixed someday.
271
272            return String(value);
273
274// If the type is 'object', we might be dealing with an object or an array or
275// null.
276
277        case 'object':
278
279// Due to a specification blunder in ECMAScript, typeof null is 'object',
280// so watch out for that case.
281
282            if (!value) {
283                return 'null';
284            }
285
286// Make an array to hold the partial results of stringifying this object value.
287
288            gap += indent;
289            partial = [];
290
291// Is the value an array?
292
293            if (Object.prototype.toString.apply(value) === '[object Array]') {
294
295// The value is an array. Stringify every element. Use null as a placeholder
296// for non-JSON values.
297
298                length = value.length;
299                for (i = 0; i < length; i += 1) {
300                    partial[i] = str(i, value) || 'null';
301                }
302
303// Join all of the elements together, separated with commas, and wrap them in
304// brackets.
305
306                v = partial.length === 0 ? '[]' : gap ?
307                    '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
308                    '[' + partial.join(',') + ']';
309                gap = mind;
310                return v;
311            }
312
313// If the replacer is an array, use it to select the members to be stringified.
314
315            if (rep && typeof rep === 'object') {
316                length = rep.length;
317                for (i = 0; i < length; i += 1) {
318                    if (typeof rep[i] === 'string') {
319                        k = rep[i];
320                        v = str(k, value);
321                        if (v) {
322                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
323                        }
324                    }
325                }
326            } else {
327
328// Otherwise, iterate through all of the keys in the object.
329
330                for (k in value) {
331                    if (Object.prototype.hasOwnProperty.call(value, k)) {
332                        v = str(k, value);
333                        if (v) {
334                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
335                        }
336                    }
337                }
338            }
339
340// Join all of the member texts together, separated with commas,
341// and wrap them in braces.
342
343            v = partial.length === 0 ? '{}' : gap ?
344                '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
345                '{' + partial.join(',') + '}';
346            gap = mind;
347            return v;
348        }
349    }
350
351// If the JSON object does not yet have a stringify method, give it one.
352
353    if (typeof JSON.stringify !== 'function') {
354        JSON.stringify = function (value, replacer, space) {
355
356// The stringify method takes a value and an optional replacer, and an optional
357// space parameter, and returns a JSON text. The replacer can be a function
358// that can replace values, or an array of strings that will select the keys.
359// A default replacer method can be provided. Use of the space parameter can
360// produce text that is more easily readable.
361
362            var i;
363            gap = '';
364            indent = '';
365
366// If the space parameter is a number, make an indent string containing that
367// many spaces.
368
369            if (typeof space === 'number') {
370                for (i = 0; i < space; i += 1) {
371                    indent += ' ';
372                }
373
374// If the space parameter is a string, it will be used as the indent string.
375
376            } else if (typeof space === 'string') {
377                indent = space;
378            }
379
380// If there is a replacer, it must be a function or an array.
381// Otherwise, throw an error.
382
383            rep = replacer;
384            if (replacer && typeof replacer !== 'function' &&
385                    (typeof replacer !== 'object' ||
386                    typeof replacer.length !== 'number')) {
387                throw new Error('JSON.stringify');
388            }
389
390// Make a fake root object containing our value under the key of ''.
391// Return the result of stringifying the value.
392
393            return str('', {'': value});
394        };
395    }
396
397
398// If the JSON object does not yet have a parse method, give it one.
399
400    if (typeof JSON.parse !== 'function') {
401        JSON.parse = function (text, reviver) {
402
403// The parse method takes a text and an optional reviver function, and returns
404// a JavaScript value if the text is a valid JSON text.
405
406            var j;
407
408            function walk(holder, key) {
409
410// The walk method is used to recursively walk the resulting structure so
411// that modifications can be made.
412
413                var k, v, value = holder[key];
414                if (value && typeof value === 'object') {
415                    for (k in value) {
416                        if (Object.prototype.hasOwnProperty.call(value, k)) {
417                            v = walk(value, k);
418                            if (v !== undefined) {
419                                value[k] = v;
420                            } else {
421                                delete value[k];
422                            }
423                        }
424                    }
425                }
426                return reviver.call(holder, key, value);
427            }
428
429
430// Parsing happens in four stages. In the first stage, we replace certain
431// Unicode characters with escape sequences. JavaScript handles many characters
432// incorrectly, either silently deleting them, or treating them as line endings.
433
434            text = String(text);
435            cx.lastIndex = 0;
436            if (cx.test(text)) {
437                text = text.replace(cx, function (a) {
438                    return '\\u' +
439                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
440                });
441            }
442
443// In the second stage, we run the text against regular expressions that look
444// for non-JSON patterns. We are especially concerned with '()' and 'new'
445// because they can cause invocation, and '=' because it can cause mutation.
446// But just to be safe, we want to reject all unexpected forms.
447
448// We split the second stage into 4 regexp operations in order to work around
449// crippling inefficiencies in IE's and Safari's regexp engines. First we
450// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
451// replace all simple value tokens with ']' characters. Third, we delete all
452// open brackets that follow a colon or comma or that begin the text. Finally,
453// we look to see that the remaining characters are only whitespace or ']' or
454// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
455
456            if (/^[\],:{}\s]*$/
457                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
458                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
459                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
460
461// In the third stage we use the eval function to compile the text into a
462// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
463// in JavaScript: it can begin a block or an object literal. We wrap the text
464// in parens to eliminate the ambiguity.
465
466                j = eval('(' + text + ')');
467
468// In the optional fourth stage, we recursively walk the new structure, passing
469// each name/value pair to a reviver function for possible transformation.
470
471                return typeof reviver === 'function' ?
472                    walk({'': j}, '') : j;
473            }
474
475// If the text is not JSON parseable, then a SyntaxError is thrown.
476
477            throw new SyntaxError('JSON.parse');
478        };
479    }
480}());