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| <td class="blob-line-code"> |
| <div class="highlight"><pre><div class='line' id='LC1'><span class="cm">/*</span></div><div class='line' id='LC2'><span class="cm"> json2.js</span></div><div class='line' id='LC3'><span class="cm"> 2013-05-26</span></div><div class='line' id='LC4'><br/></div><div class='line' id='LC5'><span class="cm"> Public Domain.</span></div><div class='line' id='LC6'><br/></div><div class='line' id='LC7'><span class="cm"> NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.</span></div><div class='line' id='LC8'><br/></div><div class='line' id='LC9'><span class="cm"> See http://www.JSON.org/js.html</span></div><div class='line' id='LC10'><br/></div><div class='line' id='LC11'><br/></div><div class='line' id='LC12'><span class="cm"> This code should be minified before deployment.</span></div><div class='line' id='LC13'><span class="cm"> See http://javascript.crockford.com/jsmin.html</span></div><div class='line' id='LC14'><br/></div><div class='line' id='LC15'><span class="cm"> USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO</span></div><div class='line' id='LC16'><span class="cm"> NOT CONTROL.</span></div><div class='line' id='LC17'><br/></div><div class='line' id='LC18'><br/></div><div class='line' id='LC19'><span class="cm"> This file creates a global JSON object containing two methods: stringify</span></div><div class='line' id='LC20'><span class="cm"> and parse.</span></div><div class='line' id='LC21'><br/></div><div class='line' id='LC22'><span class="cm"> JSON.stringify(value, replacer, space)</span></div><div class='line' id='LC23'><span class="cm"> value any JavaScript value, usually an object or array.</span></div><div class='line' id='LC24'><br/></div><div class='line' id='LC25'><span class="cm"> replacer an optional parameter that determines how object</span></div><div class='line' id='LC26'><span class="cm"> values are stringified for objects. It can be a</span></div><div class='line' id='LC27'><span class="cm"> function or an array of strings.</span></div><div class='line' id='LC28'><br/></div><div class='line' id='LC29'><span class="cm"> space an optional parameter that specifies the indentation</span></div><div class='line' id='LC30'><span class="cm"> of nested structures. If it is omitted, the text will</span></div><div class='line' id='LC31'><span class="cm"> be packed without extra whitespace. If it is a number,</span></div><div class='line' id='LC32'><span class="cm"> it will specify the number of spaces to indent at each</span></div><div class='line' id='LC33'><span class="cm"> level. If it is a string (such as '\t' or '&nbsp;'),</span></div><div class='line' id='LC34'><span class="cm"> it contains the characters used to indent at each level.</span></div><div class='line' id='LC35'><br/></div><div class='line' id='LC36'><span class="cm"> This method produces a JSON text from a JavaScript value.</span></div><div class='line' id='LC37'><br/></div><div class='line' id='LC38'><span class="cm"> When an object value is found, if the object contains a toJSON</span></div><div class='line' id='LC39'><span class="cm"> method, its toJSON method will be called and the result will be</span></div><div class='line' id='LC40'><span class="cm"> stringified. A toJSON method does not serialize: it returns the</span></div><div class='line' id='LC41'><span class="cm"> value represented by the name/value pair that should be serialized,</span></div><div class='line' id='LC42'><span class="cm"> or undefined if nothing should be serialized. The toJSON method</span></div><div class='line' id='LC43'><span class="cm"> will be passed the key associated with the value, and this will be</span></div><div class='line' id='LC44'><span class="cm"> bound to the value</span></div><div class='line' id='LC45'><br/></div><div class='line' id='LC46'><span class="cm"> For example, this would serialize Dates as ISO strings.</span></div><div class='line' id='LC47'><br/></div><div class='line' id='LC48'><span class="cm"> Date.prototype.toJSON = function (key) {</span></div><div class='line' id='LC49'><span class="cm"> function f(n) {</span></div><div class='line' id='LC50'><span class="cm"> // Format integers to have at least two digits.</span></div><div class='line' id='LC51'><span class="cm"> return n < 10 ? '0' + n : n;</span></div><div class='line' id='LC52'><span class="cm"> }</span></div><div class='line' id='LC53'><br/></div><div class='line' id='LC54'><span class="cm"> return this.getUTCFullYear() + '-' +</span></div><div class='line' id='LC55'><span class="cm"> f(this.getUTCMonth() + 1) + '-' +</span></div><div class='line' id='LC56'><span class="cm"> f(this.getUTCDate()) + 'T' +</span></div><div class='line' id='LC57'><span class="cm"> f(this.getUTCHours()) + ':' +</span></div><div class='line' id='LC58'><span class="cm"> f(this.getUTCMinutes()) + ':' +</span></div><div class='line' id='LC59'><span class="cm"> f(this.getUTCSeconds()) + 'Z';</span></div><div class='line' id='LC60'><span class="cm"> };</span></div><div class='line' id='LC61'><br/></div><div class='line' id='LC62'><span class="cm"> You can provide an optional replacer method. It will be passed the</span></div><div class='line' id='LC63'><span class="cm"> key and value of each member, with this bound to the containing</span></div><div class='line' id='LC64'><span class="cm"> object. The value that is returned from your method will be</span></div><div class='line' id='LC65'><span class="cm"> serialized. If your method returns undefined, then the member will</span></div><div class='line' id='LC66'><span class="cm"> be excluded from the serialization.</span></div><div class='line' id='LC67'><br/></div><div class='line' id='LC68'><span class="cm"> If the replacer parameter is an array of strings, then it will be</span></div><div class='line' id='LC69'><span class="cm"> used to select the members to be serialized. It filters the results</span></div><div class='line' id='LC70'><span class="cm"> such that only members with keys listed in the replacer array are</span></div><div class='line' id='LC71'><span class="cm"> stringified.</span></div><div class='line' id='LC72'><br/></div><div class='line' id='LC73'><span class="cm"> Values that do not have JSON representations, such as undefined or</span></div><div class='line' id='LC74'><span class="cm"> functions, will not be serialized. Such values in objects will be</span></div><div class='line' id='LC75'><span class="cm"> dropped; in arrays they will be replaced with null. You can use</span></div><div class='line' id='LC76'><span class="cm"> a replacer function to replace those with JSON values.</span></div><div class='line' id='LC77'><span class="cm"> JSON.stringify(undefined) returns undefined.</span></div><div class='line' id='LC78'><br/></div><div class='line' id='LC79'><span class="cm"> The optional space parameter produces a stringification of the</span></div><div class='line' id='LC80'><span class="cm"> value that is filled with line breaks and indentation to make it</span></div><div class='line' id='LC81'><span class="cm"> easier to read.</span></div><div class='line' id='LC82'><br/></div><div class='line' id='LC83'><span class="cm"> If the space parameter is a non-empty string, then that string will</span></div><div class='line' id='LC84'><span class="cm"> be used for indentation. If the space parameter is a number, then</span></div><div class='line' id='LC85'><span class="cm"> the indentation will be that many spaces.</span></div><div class='line' id='LC86'><br/></div><div class='line' id='LC87'><span class="cm"> Example:</span></div><div class='line' id='LC88'><br/></div><div class='line' id='LC89'><span class="cm"> text = JSON.stringify(['e', {pluribus: 'unum'}]);</span></div><div class='line' id='LC90'><span class="cm"> // text is '["e",{"pluribus":"unum"}]'</span></div><div class='line' id='LC91'><br/></div><div class='line' id='LC92'><br/></div><div class='line' id='LC93'><span class="cm"> text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');</span></div><div class='line' id='LC94'><span class="cm"> // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'</span></div><div class='line' id='LC95'><br/></div><div class='line' id='LC96'><span class="cm"> text = JSON.stringify([new Date()], function (key, value) {</span></div><div class='line' id='LC97'><span class="cm"> return this[key] instanceof Date ?</span></div><div class='line' id='LC98'><span class="cm"> 'Date(' + this[key] + ')' : value;</span></div><div class='line' id='LC99'><span class="cm"> });</span></div><div class='line' id='LC100'><span class="cm"> // text is '["Date(---current time---)"]'</span></div><div class='line' id='LC101'><br/></div><div class='line' id='LC102'><br/></div><div class='line' id='LC103'><span class="cm"> JSON.parse(text, reviver)</span></div><div class='line' id='LC104'><span class="cm"> This method parses a JSON text to produce an object or array.</span></div><div class='line' id='LC105'><span class="cm"> It can throw a SyntaxError exception.</span></div><div class='line' id='LC106'><br/></div><div class='line' id='LC107'><span class="cm"> The optional reviver parameter is a function that can filter and</span></div><div class='line' id='LC108'><span class="cm"> transform the results. It receives each of the keys and values,</span></div><div class='line' id='LC109'><span class="cm"> and its return value is used instead of the original value.</span></div><div class='line' id='LC110'><span class="cm"> If it returns what it received, then the structure is not modified.</span></div><div class='line' id='LC111'><span class="cm"> If it returns undefined then the member is deleted.</span></div><div class='line' id='LC112'><br/></div><div class='line' id='LC113'><span class="cm"> Example:</span></div><div class='line' id='LC114'><br/></div><div class='line' id='LC115'><span class="cm"> // Parse the text. Values that look like ISO date strings will</span></div><div class='line' id='LC116'><span class="cm"> // be converted to Date objects.</span></div><div class='line' id='LC117'><br/></div><div class='line' id='LC118'><span class="cm"> myData = JSON.parse(text, function (key, value) {</span></div><div class='line' id='LC119'><span class="cm"> var a;</span></div><div class='line' id='LC120'><span class="cm"> if (typeof value === 'string') {</span></div><div class='line' id='LC121'><span class="cm"> a =</span></div><div class='line' id='LC122'><span class="cm">/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);</span></div><div class='line' id='LC123'><span class="cm"> if (a) {</span></div><div class='line' id='LC124'><span class="cm"> return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],</span></div><div class='line' id='LC125'><span class="cm"> +a[5], +a[6]));</span></div><div class='line' id='LC126'><span class="cm"> }</span></div><div class='line' id='LC127'><span class="cm"> }</span></div><div class='line' id='LC128'><span class="cm"> return value;</span></div><div class='line' id='LC129'><span class="cm"> });</span></div><div class='line' id='LC130'><br/></div><div class='line' id='LC131'><span class="cm"> myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {</span></div><div class='line' id='LC132'><span class="cm"> var d;</span></div><div class='line' id='LC133'><span class="cm"> if (typeof value === 'string' &&</span></div><div class='line' id='LC134'><span class="cm"> value.slice(0, 5) === 'Date(' &&</span></div><div class='line' id='LC135'><span class="cm"> value.slice(-1) === ')') {</span></div><div class='line' id='LC136'><span class="cm"> d = new Date(value.slice(5, -1));</span></div><div class='line' id='LC137'><span class="cm"> if (d) {</span></div><div class='line' id='LC138'><span class="cm"> return d;</span></div><div class='line' id='LC139'><span class="cm"> }</span></div><div class='line' id='LC140'><span class="cm"> }</span></div><div class='line' id='LC141'><span class="cm"> return value;</span></div><div class='line' id='LC142'><span class="cm"> });</span></div><div class='line' id='LC143'><br/></div><div class='line' id='LC144'><br/></div><div class='line' id='LC145'><span class="cm"> This is a reference implementation. You are free to copy, modify, or</span></div><div class='line' id='LC146'><span class="cm"> redistribute.</span></div><div class='line' id='LC147'><span class="cm">*/</span></div><div class='line' id='LC148'><br/></div><div class='line' id='LC149'><span class="cm">/*jslint evil: true, regexp: true */</span></div><div class='line' id='LC150'><br/></div><div class='line' id='LC151'><span class="cm">/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,</span></div><div class='line' id='LC152'><span class="cm"> call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,</span></div><div class='line' id='LC153'><span class="cm"> getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,</span></div><div class='line' id='LC154'><span class="cm"> lastIndex, length, parse, prototype, push, replace, slice, stringify,</span></div><div class='line' id='LC155'><span class="cm"> test, toJSON, toString, valueOf</span></div><div class='line' id='LC156'><span class="cm">*/</span></div><div class='line' id='LC157'><br/></div><div class='line' id='LC158'><br/></div><div class='line' id='LC159'><span class="c1">// Create a JSON object only if one does not already exist. We create the</span></div><div class='line' id='LC160'><span class="c1">// methods in a closure to avoid creating global variables.</span></div><div class='line' id='LC161'><br/></div><div class='line' id='LC162'><span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">JSON</span> <span class="o">!==</span> <span class="s1">'object'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC163'> <span class="nx">JSON</span> <span class="o">=</span> <span class="p">{};</span></div><div class='line' id='LC164'><span class="p">}</span></div><div class='line' id='LC165'><br/></div><div class='line' id='LC166'><span class="p">(</span><span class="kd">function</span> <span class="p">()</span> <span class="p">{</span></div><div class='line' id='LC167'> <span class="s1">'use strict'</span><span class="p">;</span></div><div class='line' id='LC168'><br/></div><div class='line' id='LC169'> <span class="kd">function</span> <span class="nx">f</span><span class="p">(</span><span class="nx">n</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC170'> <span class="c1">// Format integers to have at least two digits.</span></div><div class='line' id='LC171'> <span class="k">return</span> <span class="nx">n</span> <span class="o"><</span> <span class="mi">10</span> <span class="o">?</span> <span class="s1">'0'</span> <span class="o">+</span> <span class="nx">n</span> <span class="o">:</span> <span class="nx">n</span><span class="p">;</span></div><div class='line' id='LC172'> <span class="p">}</span></div><div class='line' id='LC173'><br/></div><div class='line' id='LC174'> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nb">Date</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toJSON</span> <span class="o">!==</span> <span class="s1">'function'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC175'><br/></div><div class='line' id='LC176'> <span class="nb">Date</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toJSON</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span></div><div class='line' id='LC177'><br/></div><div class='line' id='LC178'> <span class="k">return</span> <span class="nb">isFinite</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">valueOf</span><span class="p">())</span></div><div class='line' id='LC179'> <span class="o">?</span> <span class="k">this</span><span class="p">.</span><span class="nx">getUTCFullYear</span><span class="p">()</span> <span class="o">+</span> <span class="s1">'-'</span> <span class="o">+</span></div><div class='line' id='LC180'> <span class="nx">f</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">getUTCMonth</span><span class="p">()</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">+</span> <span class="s1">'-'</span> <span class="o">+</span></div><div class='line' id='LC181'> <span class="nx">f</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">getUTCDate</span><span class="p">())</span> <span class="o">+</span> <span class="s1">'T'</span> <span class="o">+</span></div><div class='line' id='LC182'> <span class="nx">f</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">getUTCHours</span><span class="p">())</span> <span class="o">+</span> <span class="s1">':'</span> <span class="o">+</span></div><div class='line' id='LC183'> <span class="nx">f</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">getUTCMinutes</span><span class="p">())</span> <span class="o">+</span> <span class="s1">':'</span> <span class="o">+</span></div><div class='line' id='LC184'> <span class="nx">f</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">getUTCSeconds</span><span class="p">())</span> <span class="o">+</span> <span class="s1">'Z'</span></div><div class='line' id='LC185'> <span class="o">:</span> <span class="kc">null</span><span class="p">;</span></div><div class='line' id='LC186'> <span class="p">};</span></div><div class='line' id='LC187'><br/></div><div class='line' id='LC188'> <span class="nb">String</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toJSON</span> <span class="o">=</span></div><div class='line' id='LC189'> <span class="nb">Number</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toJSON</span> <span class="o">=</span></div><div class='line' id='LC190'> <span class="nb">Boolean</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toJSON</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span></div><div class='line' id='LC191'> <span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">valueOf</span><span class="p">();</span></div><div class='line' id='LC192'> <span class="p">};</span></div><div class='line' id='LC193'> <span class="p">}</span></div><div class='line' id='LC194'><br/></div><div class='line' id='LC195'> <span class="kd">var</span> <span class="nx">cx</span> <span class="o">=</span> <span class="sr">/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g</span><span class="p">,</span></div><div class='line' id='LC196'> <span class="nx">escapable</span> <span class="o">=</span> <span class="sr">/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g</span><span class="p">,</span></div><div class='line' id='LC197'> <span class="nx">gap</span><span class="p">,</span></div><div class='line' id='LC198'> <span class="nx">indent</span><span class="p">,</span></div><div class='line' id='LC199'> <span class="nx">meta</span> <span class="o">=</span> <span class="p">{</span> <span class="c1">// table of character substitutions</span></div><div class='line' id='LC200'> <span class="s1">'\b'</span><span class="o">:</span> <span class="s1">'\\b'</span><span class="p">,</span></div><div class='line' id='LC201'> <span class="s1">'\t'</span><span class="o">:</span> <span class="s1">'\\t'</span><span class="p">,</span></div><div class='line' id='LC202'> <span class="s1">'\n'</span><span class="o">:</span> <span class="s1">'\\n'</span><span class="p">,</span></div><div class='line' id='LC203'> <span class="s1">'\f'</span><span class="o">:</span> <span class="s1">'\\f'</span><span class="p">,</span></div><div class='line' id='LC204'> <span class="s1">'\r'</span><span class="o">:</span> <span class="s1">'\\r'</span><span class="p">,</span></div><div class='line' id='LC205'> <span class="s1">'"'</span> <span class="o">:</span> <span class="s1">'\\"'</span><span class="p">,</span></div><div class='line' id='LC206'> <span class="s1">'\\'</span><span class="o">:</span> <span class="s1">'\\\\'</span></div><div class='line' id='LC207'> <span class="p">},</span></div><div class='line' id='LC208'> <span class="nx">rep</span><span class="p">;</span></div><div class='line' id='LC209'><br/></div><div class='line' id='LC210'><br/></div><div class='line' id='LC211'> <span class="kd">function</span> <span class="nx">quote</span><span class="p">(</span><span class="nx">string</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC212'><br/></div><div class='line' id='LC213'><span class="c1">// If the string contains no control characters, no quote characters, and no</span></div><div class='line' id='LC214'><span class="c1">// backslash characters, then we can safely slap some quotes around it.</span></div><div class='line' id='LC215'><span class="c1">// Otherwise we must also replace the offending characters with safe escape</span></div><div class='line' id='LC216'><span class="c1">// sequences.</span></div><div class='line' id='LC217'><br/></div><div class='line' id='LC218'> <span class="nx">escapable</span><span class="p">.</span><span class="nx">lastIndex</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span></div><div class='line' id='LC219'> <span class="k">return</span> <span class="nx">escapable</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">string</span><span class="p">)</span> <span class="o">?</span> <span class="s1">'"'</span> <span class="o">+</span> <span class="nx">string</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="nx">escapable</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">a</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC220'> <span class="kd">var</span> <span class="nx">c</span> <span class="o">=</span> <span class="nx">meta</span><span class="p">[</span><span class="nx">a</span><span class="p">];</span></div><div class='line' id='LC221'> <span class="k">return</span> <span class="k">typeof</span> <span class="nx">c</span> <span class="o">===</span> <span class="s1">'string'</span></div><div class='line' id='LC222'> <span class="o">?</span> <span class="nx">c</span></div><div class='line' id='LC223'> <span class="o">:</span> <span class="s1">'\\u'</span> <span class="o">+</span> <span class="p">(</span><span class="s1">'0000'</span> <span class="o">+</span> <span class="nx">a</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="mi">0</span><span class="p">).</span><span class="nx">toString</span><span class="p">(</span><span class="mi">16</span><span class="p">)).</span><span class="nx">slice</span><span class="p">(</span><span class="o">-</span><span class="mi">4</span><span class="p">);</span></div><div class='line' id='LC224'> <span class="p">})</span> <span class="o">+</span> <span class="s1">'"'</span> <span class="o">:</span> <span class="s1">'"'</span> <span class="o">+</span> <span class="nx">string</span> <span class="o">+</span> <span class="s1">'"'</span><span class="p">;</span></div><div class='line' id='LC225'> <span class="p">}</span></div><div class='line' id='LC226'><br/></div><div class='line' id='LC227'><br/></div><div class='line' id='LC228'> <span class="kd">function</span> <span class="nx">str</span><span class="p">(</span><span class="nx">key</span><span class="p">,</span> <span class="nx">holder</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC229'><br/></div><div class='line' id='LC230'><span class="c1">// Produce a string from holder[key].</span></div><div class='line' id='LC231'><br/></div><div class='line' id='LC232'> <span class="kd">var</span> <span class="nx">i</span><span class="p">,</span> <span class="c1">// The loop counter.</span></div><div class='line' id='LC233'> <span class="nx">k</span><span class="p">,</span> <span class="c1">// The member key.</span></div><div class='line' id='LC234'> <span class="nx">v</span><span class="p">,</span> <span class="c1">// The member value.</span></div><div class='line' id='LC235'> <span class="nx">length</span><span class="p">,</span></div><div class='line' id='LC236'> <span class="nx">mind</span> <span class="o">=</span> <span class="nx">gap</span><span class="p">,</span></div><div class='line' id='LC237'> <span class="nx">partial</span><span class="p">,</span></div><div class='line' id='LC238'> <span class="nx">value</span> <span class="o">=</span> <span class="nx">holder</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span></div><div class='line' id='LC239'><br/></div><div class='line' id='LC240'><span class="c1">// If the value has a toJSON method, call it to obtain a replacement value.</span></div><div class='line' id='LC241'><br/></div><div class='line' id='LC242'> <span class="k">if</span> <span class="p">(</span><span class="nx">value</span> <span class="o">&&</span> <span class="k">typeof</span> <span class="nx">value</span> <span class="o">===</span> <span class="s1">'object'</span> <span class="o">&&</span></div><div class='line' id='LC243'> <span class="k">typeof</span> <span class="nx">value</span><span class="p">.</span><span class="nx">toJSON</span> <span class="o">===</span> <span class="s1">'function'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC244'> <span class="nx">value</span> <span class="o">=</span> <span class="nx">value</span><span class="p">.</span><span class="nx">toJSON</span><span class="p">(</span><span class="nx">key</span><span class="p">);</span></div><div class='line' id='LC245'> <span class="p">}</span></div><div class='line' id='LC246'><br/></div><div class='line' id='LC247'><span class="c1">// If we were called with a replacer function, then call the replacer to</span></div><div class='line' id='LC248'><span class="c1">// obtain a replacement value.</span></div><div class='line' id='LC249'><br/></div><div class='line' id='LC250'> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">rep</span> <span class="o">===</span> <span class="s1">'function'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC251'> <span class="nx">value</span> <span class="o">=</span> <span class="nx">rep</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">holder</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">value</span><span class="p">);</span></div><div class='line' id='LC252'> <span class="p">}</span></div><div class='line' id='LC253'><br/></div><div class='line' id='LC254'><span class="c1">// What happens next depends on the value's type.</span></div><div class='line' id='LC255'><br/></div><div class='line' id='LC256'> <span class="k">switch</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC257'> <span class="k">case</span> <span class="s1">'string'</span><span class="o">:</span></div><div class='line' id='LC258'> <span class="k">return</span> <span class="nx">quote</span><span class="p">(</span><span class="nx">value</span><span class="p">);</span></div><div class='line' id='LC259'><br/></div><div class='line' id='LC260'> <span class="k">case</span> <span class="s1">'number'</span><span class="o">:</span></div><div class='line' id='LC261'><br/></div><div class='line' id='LC262'><span class="c1">// JSON numbers must be finite. Encode non-finite numbers as null.</span></div><div class='line' id='LC263'><br/></div><div class='line' id='LC264'> <span class="k">return</span> <span class="nb">isFinite</span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">?</span> <span class="nb">String</span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">:</span> <span class="s1">'null'</span><span class="p">;</span></div><div class='line' id='LC265'><br/></div><div class='line' id='LC266'> <span class="k">case</span> <span class="s1">'boolean'</span><span class="o">:</span></div><div class='line' id='LC267'> <span class="k">case</span> <span class="s1">'null'</span><span class="o">:</span></div><div class='line' id='LC268'><br/></div><div class='line' id='LC269'><span class="c1">// If the value is a boolean or null, convert it to a string. Note:</span></div><div class='line' id='LC270'><span class="c1">// typeof null does not produce 'null'. The case is included here in</span></div><div class='line' id='LC271'><span class="c1">// the remote chance that this gets fixed someday.</span></div><div class='line' id='LC272'><br/></div><div class='line' id='LC273'> <span class="k">return</span> <span class="nb">String</span><span class="p">(</span><span class="nx">value</span><span class="p">);</span></div><div class='line' id='LC274'><br/></div><div class='line' id='LC275'><span class="c1">// If the type is 'object', we might be dealing with an object or an array or</span></div><div class='line' id='LC276'><span class="c1">// null.</span></div><div class='line' id='LC277'><br/></div><div class='line' id='LC278'> <span class="k">case</span> <span class="s1">'object'</span><span class="o">:</span></div><div class='line' id='LC279'><br/></div><div class='line' id='LC280'><span class="c1">// Due to a specification blunder in ECMAScript, typeof null is 'object',</span></div><div class='line' id='LC281'><span class="c1">// so watch out for that case.</span></div><div class='line' id='LC282'><br/></div><div class='line' id='LC283'> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">value</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC284'> <span class="k">return</span> <span class="s1">'null'</span><span class="p">;</span></div><div class='line' id='LC285'> <span class="p">}</span></div><div class='line' id='LC286'><br/></div><div class='line' id='LC287'><span class="c1">// Make an array to hold the partial results of stringifying this object value.</span></div><div class='line' id='LC288'><br/></div><div class='line' id='LC289'> <span class="nx">gap</span> <span class="o">+=</span> <span class="nx">indent</span><span class="p">;</span></div><div class='line' id='LC290'> <span class="nx">partial</span> <span class="o">=</span> <span class="p">[];</span></div><div class='line' id='LC291'><br/></div><div class='line' id='LC292'><span class="c1">// Is the value an array?</span></div><div class='line' id='LC293'><br/></div><div class='line' id='LC294'> <span class="k">if</span> <span class="p">(</span><span class="nb">Object</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">toString</span><span class="p">.</span><span class="nx">apply</span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">===</span> <span class="s1">'[object Array]'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC295'><br/></div><div class='line' id='LC296'><span class="c1">// The value is an array. Stringify every element. Use null as a placeholder</span></div><div class='line' id='LC297'><span class="c1">// for non-JSON values.</span></div><div class='line' id='LC298'><br/></div><div class='line' id='LC299'> <span class="nx">length</span> <span class="o">=</span> <span class="nx">value</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span></div><div class='line' id='LC300'> <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><</span> <span class="nx">length</span><span class="p">;</span> <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC301'> <span class="nx">partial</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">=</span> <span class="nx">str</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="o">||</span> <span class="s1">'null'</span><span class="p">;</span></div><div class='line' id='LC302'> <span class="p">}</span></div><div class='line' id='LC303'><br/></div><div class='line' id='LC304'><span class="c1">// Join all of the elements together, separated with commas, and wrap them in</span></div><div class='line' id='LC305'><span class="c1">// brackets.</span></div><div class='line' id='LC306'><br/></div><div class='line' id='LC307'> <span class="nx">v</span> <span class="o">=</span> <span class="nx">partial</span><span class="p">.</span><span class="nx">length</span> <span class="o">===</span> <span class="mi">0</span></div><div class='line' id='LC308'> <span class="o">?</span> <span class="s1">'[]'</span></div><div class='line' id='LC309'> <span class="o">:</span> <span class="nx">gap</span></div><div class='line' id='LC310'> <span class="o">?</span> <span class="s1">'[\n'</span> <span class="o">+</span> <span class="nx">gap</span> <span class="o">+</span> <span class="nx">partial</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">',\n'</span> <span class="o">+</span> <span class="nx">gap</span><span class="p">)</span> <span class="o">+</span> <span class="s1">'\n'</span> <span class="o">+</span> <span class="nx">mind</span> <span class="o">+</span> <span class="s1">']'</span></div><div class='line' id='LC311'> <span class="o">:</span> <span class="s1">'['</span> <span class="o">+</span> <span class="nx">partial</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">','</span><span class="p">)</span> <span class="o">+</span> <span class="s1">']'</span><span class="p">;</span></div><div class='line' id='LC312'> <span class="nx">gap</span> <span class="o">=</span> <span class="nx">mind</span><span class="p">;</span></div><div class='line' id='LC313'> <span class="k">return</span> <span class="nx">v</span><span class="p">;</span></div><div class='line' id='LC314'> <span class="p">}</span></div><div class='line' id='LC315'><br/></div><div class='line' id='LC316'><span class="c1">// If the replacer is an array, use it to select the members to be stringified.</span></div><div class='line' id='LC317'><br/></div><div class='line' id='LC318'> <span class="k">if</span> <span class="p">(</span><span class="nx">rep</span> <span class="o">&&</span> <span class="k">typeof</span> <span class="nx">rep</span> <span class="o">===</span> <span class="s1">'object'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC319'> <span class="nx">length</span> <span class="o">=</span> <span class="nx">rep</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span></div><div class='line' id='LC320'> <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><</span> <span class="nx">length</span><span class="p">;</span> <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC321'> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">rep</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">===</span> <span class="s1">'string'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC322'> <span class="nx">k</span> <span class="o">=</span> <span class="nx">rep</span><span class="p">[</span><span class="nx">i</span><span class="p">];</span></div><div class='line' id='LC323'> <span class="nx">v</span> <span class="o">=</span> <span class="nx">str</span><span class="p">(</span><span class="nx">k</span><span class="p">,</span> <span class="nx">value</span><span class="p">);</span></div><div class='line' id='LC324'> <span class="k">if</span> <span class="p">(</span><span class="nx">v</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC325'> <span class="nx">partial</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">quote</span><span class="p">(</span><span class="nx">k</span><span class="p">)</span> <span class="o">+</span> <span class="p">(</span><span class="nx">gap</span> <span class="o">?</span> <span class="s1">': '</span> <span class="o">:</span> <span class="s1">':'</span><span class="p">)</span> <span class="o">+</span> <span class="nx">v</span><span class="p">);</span></div><div class='line' id='LC326'> <span class="p">}</span></div><div class='line' id='LC327'> <span class="p">}</span></div><div class='line' id='LC328'> <span class="p">}</span></div><div class='line' id='LC329'> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span></div><div class='line' id='LC330'><br/></div><div class='line' id='LC331'><span class="c1">// Otherwise, iterate through all of the keys in the object.</span></div><div class='line' id='LC332'><br/></div><div class='line' id='LC333'> <span class="k">for</span> <span class="p">(</span><span class="nx">k</span> <span class="k">in</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC334'> <span class="k">if</span> <span class="p">(</span><span class="nb">Object</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">hasOwnProperty</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">value</span><span class="p">,</span> <span class="nx">k</span><span class="p">))</span> <span class="p">{</span></div><div class='line' id='LC335'> <span class="nx">v</span> <span class="o">=</span> <span class="nx">str</span><span class="p">(</span><span class="nx">k</span><span class="p">,</span> <span class="nx">value</span><span class="p">);</span></div><div class='line' id='LC336'> <span class="k">if</span> <span class="p">(</span><span class="nx">v</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC337'> <span class="nx">partial</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">quote</span><span class="p">(</span><span class="nx">k</span><span class="p">)</span> <span class="o">+</span> <span class="p">(</span><span class="nx">gap</span> <span class="o">?</span> <span class="s1">': '</span> <span class="o">:</span> <span class="s1">':'</span><span class="p">)</span> <span class="o">+</span> <span class="nx">v</span><span class="p">);</span></div><div class='line' id='LC338'> <span class="p">}</span></div><div class='line' id='LC339'> <span class="p">}</span></div><div class='line' id='LC340'> <span class="p">}</span></div><div class='line' id='LC341'> <span class="p">}</span></div><div class='line' id='LC342'><br/></div><div class='line' id='LC343'><span class="c1">// Join all of the member texts together, separated with commas,</span></div><div class='line' id='LC344'><span class="c1">// and wrap them in braces.</span></div><div class='line' id='LC345'><br/></div><div class='line' id='LC346'> <span class="nx">v</span> <span class="o">=</span> <span class="nx">partial</span><span class="p">.</span><span class="nx">length</span> <span class="o">===</span> <span class="mi">0</span></div><div class='line' id='LC347'> <span class="o">?</span> <span class="s1">'{}'</span></div><div class='line' id='LC348'> <span class="o">:</span> <span class="nx">gap</span></div><div class='line' id='LC349'> <span class="o">?</span> <span class="s1">'{\n'</span> <span class="o">+</span> <span class="nx">gap</span> <span class="o">+</span> <span class="nx">partial</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">',\n'</span> <span class="o">+</span> <span class="nx">gap</span><span class="p">)</span> <span class="o">+</span> <span class="s1">'\n'</span> <span class="o">+</span> <span class="nx">mind</span> <span class="o">+</span> <span class="s1">'}'</span></div><div class='line' id='LC350'> <span class="o">:</span> <span class="s1">'{'</span> <span class="o">+</span> <span class="nx">partial</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="s1">','</span><span class="p">)</span> <span class="o">+</span> <span class="s1">'}'</span><span class="p">;</span></div><div class='line' id='LC351'> <span class="nx">gap</span> <span class="o">=</span> <span class="nx">mind</span><span class="p">;</span></div><div class='line' id='LC352'> <span class="k">return</span> <span class="nx">v</span><span class="p">;</span></div><div class='line' id='LC353'> <span class="p">}</span></div><div class='line' id='LC354'> <span class="p">}</span></div><div class='line' id='LC355'><br/></div><div class='line' id='LC356'><span class="c1">// If the JSON object does not yet have a stringify method, give it one.</span></div><div class='line' id='LC357'><br/></div><div class='line' id='LC358'> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">JSON</span><span class="p">.</span><span class="nx">stringify</span> <span class="o">!==</span> <span class="s1">'function'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC359'> <span class="nx">JSON</span><span class="p">.</span><span class="nx">stringify</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">value</span><span class="p">,</span> <span class="nx">replacer</span><span class="p">,</span> <span class="nx">space</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC360'><br/></div><div class='line' id='LC361'><span class="c1">// The stringify method takes a value and an optional replacer, and an optional</span></div><div class='line' id='LC362'><span class="c1">// space parameter, and returns a JSON text. The replacer can be a function</span></div><div class='line' id='LC363'><span class="c1">// that can replace values, or an array of strings that will select the keys.</span></div><div class='line' id='LC364'><span class="c1">// A default replacer method can be provided. Use of the space parameter can</span></div><div class='line' id='LC365'><span class="c1">// produce text that is more easily readable.</span></div><div class='line' id='LC366'><br/></div><div class='line' id='LC367'> <span class="kd">var</span> <span class="nx">i</span><span class="p">;</span></div><div class='line' id='LC368'> <span class="nx">gap</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span></div><div class='line' id='LC369'> <span class="nx">indent</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span></div><div class='line' id='LC370'><br/></div><div class='line' id='LC371'><span class="c1">// If the space parameter is a number, make an indent string containing that</span></div><div class='line' id='LC372'><span class="c1">// many spaces.</span></div><div class='line' id='LC373'><br/></div><div class='line' id='LC374'> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">space</span> <span class="o">===</span> <span class="s1">'number'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC375'> <span class="k">for</span> <span class="p">(</span><span class="nx">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">i</span> <span class="o"><</span> <span class="nx">space</span><span class="p">;</span> <span class="nx">i</span> <span class="o">+=</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC376'> <span class="nx">indent</span> <span class="o">+=</span> <span class="s1">' '</span><span class="p">;</span></div><div class='line' id='LC377'> <span class="p">}</span></div><div class='line' id='LC378'><br/></div><div class='line' id='LC379'><span class="c1">// If the space parameter is a string, it will be used as the indent string.</span></div><div class='line' id='LC380'><br/></div><div class='line' id='LC381'> <span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">space</span> <span class="o">===</span> <span class="s1">'string'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC382'> <span class="nx">indent</span> <span class="o">=</span> <span class="nx">space</span><span class="p">;</span></div><div class='line' id='LC383'> <span class="p">}</span></div><div class='line' id='LC384'><br/></div><div class='line' id='LC385'><span class="c1">// If there is a replacer, it must be a function or an array.</span></div><div class='line' id='LC386'><span class="c1">// Otherwise, throw an error.</span></div><div class='line' id='LC387'><br/></div><div class='line' id='LC388'> <span class="nx">rep</span> <span class="o">=</span> <span class="nx">replacer</span><span class="p">;</span></div><div class='line' id='LC389'> <span class="k">if</span> <span class="p">(</span><span class="nx">replacer</span> <span class="o">&&</span> <span class="k">typeof</span> <span class="nx">replacer</span> <span class="o">!==</span> <span class="s1">'function'</span> <span class="o">&&</span></div><div class='line' id='LC390'> <span class="p">(</span><span class="k">typeof</span> <span class="nx">replacer</span> <span class="o">!==</span> <span class="s1">'object'</span> <span class="o">||</span></div><div class='line' id='LC391'> <span class="k">typeof</span> <span class="nx">replacer</span><span class="p">.</span><span class="nx">length</span> <span class="o">!==</span> <span class="s1">'number'</span><span class="p">))</span> <span class="p">{</span></div><div class='line' id='LC392'> <span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">'JSON.stringify'</span><span class="p">);</span></div><div class='line' id='LC393'> <span class="p">}</span></div><div class='line' id='LC394'><br/></div><div class='line' id='LC395'><span class="c1">// Make a fake root object containing our value under the key of ''.</span></div><div class='line' id='LC396'><span class="c1">// Return the result of stringifying the value.</span></div><div class='line' id='LC397'><br/></div><div class='line' id='LC398'> <span class="k">return</span> <span class="nx">str</span><span class="p">(</span><span class="s1">''</span><span class="p">,</span> <span class="p">{</span><span class="s1">''</span><span class="o">:</span> <span class="nx">value</span><span class="p">});</span></div><div class='line' id='LC399'> <span class="p">};</span></div><div class='line' id='LC400'> <span class="p">}</span></div><div class='line' id='LC401'><br/></div><div class='line' id='LC402'><br/></div><div class='line' id='LC403'><span class="c1">// If the JSON object does not yet have a parse method, give it one.</span></div><div class='line' id='LC404'><br/></div><div class='line' id='LC405'> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">JSON</span><span class="p">.</span><span class="nx">parse</span> <span class="o">!==</span> <span class="s1">'function'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC406'> <span class="nx">JSON</span><span class="p">.</span><span class="nx">parse</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">text</span><span class="p">,</span> <span class="nx">reviver</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC407'><br/></div><div class='line' id='LC408'><span class="c1">// The parse method takes a text and an optional reviver function, and returns</span></div><div class='line' id='LC409'><span class="c1">// a JavaScript value if the text is a valid JSON text.</span></div><div class='line' id='LC410'><br/></div><div class='line' id='LC411'> <span class="kd">var</span> <span class="nx">j</span><span class="p">;</span></div><div class='line' id='LC412'><br/></div><div class='line' id='LC413'> <span class="kd">function</span> <span class="nx">walk</span><span class="p">(</span><span class="nx">holder</span><span class="p">,</span> <span class="nx">key</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC414'><br/></div><div class='line' id='LC415'><span class="c1">// The walk method is used to recursively walk the resulting structure so</span></div><div class='line' id='LC416'><span class="c1">// that modifications can be made.</span></div><div class='line' id='LC417'><br/></div><div class='line' id='LC418'> <span class="kd">var</span> <span class="nx">k</span><span class="p">,</span> <span class="nx">v</span><span class="p">,</span> <span class="nx">value</span> <span class="o">=</span> <span class="nx">holder</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span></div><div class='line' id='LC419'> <span class="k">if</span> <span class="p">(</span><span class="nx">value</span> <span class="o">&&</span> <span class="k">typeof</span> <span class="nx">value</span> <span class="o">===</span> <span class="s1">'object'</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC420'> <span class="k">for</span> <span class="p">(</span><span class="nx">k</span> <span class="k">in</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC421'> <span class="k">if</span> <span class="p">(</span><span class="nb">Object</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">hasOwnProperty</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">value</span><span class="p">,</span> <span class="nx">k</span><span class="p">))</span> <span class="p">{</span></div><div class='line' id='LC422'> <span class="nx">v</span> <span class="o">=</span> <span class="nx">walk</span><span class="p">(</span><span class="nx">value</span><span class="p">,</span> <span class="nx">k</span><span class="p">);</span></div><div class='line' id='LC423'> <span class="k">if</span> <span class="p">(</span><span class="nx">v</span> <span class="o">!==</span> <span class="kc">undefined</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC424'> <span class="nx">value</span><span class="p">[</span><span class="nx">k</span><span class="p">]</span> <span class="o">=</span> <span class="nx">v</span><span class="p">;</span></div><div class='line' id='LC425'> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span></div><div class='line' id='LC426'> <span class="k">delete</span> <span class="nx">value</span><span class="p">[</span><span class="nx">k</span><span class="p">];</span></div><div class='line' id='LC427'> <span class="p">}</span></div><div class='line' id='LC428'> <span class="p">}</span></div><div class='line' id='LC429'> <span class="p">}</span></div><div class='line' id='LC430'> <span class="p">}</span></div><div class='line' id='LC431'> <span class="k">return</span> <span class="nx">reviver</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">holder</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">value</span><span class="p">);</span></div><div class='line' id='LC432'> <span class="p">}</span></div><div class='line' id='LC433'><br/></div><div class='line' id='LC434'><br/></div><div class='line' id='LC435'><span class="c1">// Parsing happens in four stages. In the first stage, we replace certain</span></div><div class='line' id='LC436'><span class="c1">// Unicode characters with escape sequences. JavaScript handles many characters</span></div><div class='line' id='LC437'><span class="c1">// incorrectly, either silently deleting them, or treating them as line endings.</span></div><div class='line' id='LC438'><br/></div><div class='line' id='LC439'> <span class="nx">text</span> <span class="o">=</span> <span class="nb">String</span><span class="p">(</span><span class="nx">text</span><span class="p">);</span></div><div class='line' id='LC440'> <span class="nx">cx</span><span class="p">.</span><span class="nx">lastIndex</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span></div><div class='line' id='LC441'> <span class="k">if</span> <span class="p">(</span><span class="nx">cx</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">text</span><span class="p">))</span> <span class="p">{</span></div><div class='line' id='LC442'> <span class="nx">text</span> <span class="o">=</span> <span class="nx">text</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="nx">cx</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">a</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC443'> <span class="k">return</span> <span class="s1">'\\u'</span> <span class="o">+</span></div><div class='line' id='LC444'> <span class="p">(</span><span class="s1">'0000'</span> <span class="o">+</span> <span class="nx">a</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="mi">0</span><span class="p">).</span><span class="nx">toString</span><span class="p">(</span><span class="mi">16</span><span class="p">)).</span><span class="nx">slice</span><span class="p">(</span><span class="o">-</span><span class="mi">4</span><span class="p">);</span></div><div class='line' id='LC445'> <span class="p">});</span></div><div class='line' id='LC446'> <span class="p">}</span></div><div class='line' id='LC447'><br/></div><div class='line' id='LC448'><span class="c1">// In the second stage, we run the text against regular expressions that look</span></div><div class='line' id='LC449'><span class="c1">// for non-JSON patterns. We are especially concerned with '()' and 'new'</span></div><div class='line' id='LC450'><span class="c1">// because they can cause invocation, and '=' because it can cause mutation.</span></div><div class='line' id='LC451'><span class="c1">// But just to be safe, we want to reject all unexpected forms.</span></div><div class='line' id='LC452'><br/></div><div class='line' id='LC453'><span class="c1">// We split the second stage into 4 regexp operations in order to work around</span></div><div class='line' id='LC454'><span class="c1">// crippling inefficiencies in IE's and Safari's regexp engines. First we</span></div><div class='line' id='LC455'><span class="c1">// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we</span></div><div class='line' id='LC456'><span class="c1">// replace all simple value tokens with ']' characters. Third, we delete all</span></div><div class='line' id='LC457'><span class="c1">// open brackets that follow a colon or comma or that begin the text. Finally,</span></div><div class='line' id='LC458'><span class="c1">// we look to see that the remaining characters are only whitespace or ']' or</span></div><div class='line' id='LC459'><span class="c1">// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.</span></div><div class='line' id='LC460'><br/></div><div class='line' id='LC461'> <span class="k">if</span> <span class="p">(</span><span class="sr">/^[\],:{}\s]*$/</span></div><div class='line' id='LC462'> <span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">text</span><span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g</span><span class="p">,</span> <span class="s1">'@'</span><span class="p">)</span></div><div class='line' id='LC463'> <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g</span><span class="p">,</span> <span class="s1">']'</span><span class="p">)</span></div><div class='line' id='LC464'> <span class="p">.</span><span class="nx">replace</span><span class="p">(</span><span class="sr">/(?:^|:|,)(?:\s*\[)+/g</span><span class="p">,</span> <span class="s1">''</span><span class="p">)))</span> <span class="p">{</span></div><div class='line' id='LC465'><br/></div><div class='line' id='LC466'><span class="c1">// In the third stage we use the eval function to compile the text into a</span></div><div class='line' id='LC467'><span class="c1">// JavaScript structure. The '{' operator is subject to a syntactic ambiguity</span></div><div class='line' id='LC468'><span class="c1">// in JavaScript: it can begin a block or an object literal. We wrap the text</span></div><div class='line' id='LC469'><span class="c1">// in parens to eliminate the ambiguity.</span></div><div class='line' id='LC470'><br/></div><div class='line' id='LC471'> <span class="nx">j</span> <span class="o">=</span> <span class="nb">eval</span><span class="p">(</span><span class="s1">'('</span> <span class="o">+</span> <span class="nx">text</span> <span class="o">+</span> <span class="s1">')'</span><span class="p">);</span></div><div class='line' id='LC472'><br/></div><div class='line' id='LC473'><span class="c1">// In the optional fourth stage, we recursively walk the new structure, passing</span></div><div class='line' id='LC474'><span class="c1">// each name/value pair to a reviver function for possible transformation.</span></div><div class='line' id='LC475'><br/></div><div class='line' id='LC476'> <span class="k">return</span> <span class="k">typeof</span> <span class="nx">reviver</span> <span class="o">===</span> <span class="s1">'function'</span></div><div class='line' id='LC477'> <span class="o">?</span> <span class="nx">walk</span><span class="p">({</span><span class="s1">''</span><span class="o">:</span> <span class="nx">j</span><span class="p">},</span> <span class="s1">''</span><span class="p">)</span></div><div class='line' id='LC478'> <span class="o">:</span> <span class="nx">j</span><span class="p">;</span></div><div class='line' id='LC479'> <span class="p">}</span></div><div class='line' id='LC480'><br/></div><div class='line' id='LC481'><span class="c1">// If the text is not JSON parseable, then a SyntaxError is thrown.</span></div><div class='line' id='LC482'><br/></div><div class='line' id='LC483'> <span class="k">throw</span> <span class="k">new</span> <span class="nx">SyntaxError</span><span class="p">(</span><span class="s1">'JSON.parse'</span><span class="p">);</span></div><div class='line' id='LC484'> <span class="p">};</span></div><div class='line' id='LC485'> <span class="p">}</span></div><div class='line' id='LC486'><span class="p">}());</span></div></pre></div> |
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