var JSON;
if (!JSON) {
	JSON = {};
}

(function () {
	'use strict';

	function f(n) {
		// Format integers to have at least two digits.
		return n < 10 ? '0' + n : n;
	}

	if (typeof Date.prototype.toJSON !== 'function') {

		Date.prototype.toJSON = function (key) {

			return isFinite(this.valueOf())
                ? this.getUTCFullYear() + '-' +
                    f(this.getUTCMonth() + 1) + '-' +
                    f(this.getUTCDate()) + 'T' +
                    f(this.getUTCHours()) + ':' +
                    f(this.getUTCMinutes()) + ':' +
                    f(this.getUTCSeconds()) + 'Z'
                : null;
		};

		String.prototype.toJSON =
            Number.prototype.toJSON =
            Boolean.prototype.toJSON = function (key) {
            	return this.valueOf();
            };
	}

	var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        gap,
        indent,
        meta = {    // table of character substitutions
        	'\b': '\\b',
        	'\t': '\\t',
        	'\n': '\\n',
        	'\f': '\\f',
        	'\r': '\\r',
        	'"': '\\"',
        	'\\': '\\\\'
        },
        rep;


	function quote(string) {

		// If the string contains no control characters, no quote characters, and no
		// backslash characters, then we can safely slap some quotes around it.
		// Otherwise we must also replace the offending characters with safe escape
		// sequences.

		escapable.lastIndex = 0;
		return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
			var c = meta[a];
			return typeof c === 'string'
                ? c
                : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
		}) + '"' : '"' + string + '"';
	}


	function str(key, holder) {

		// Produce a string from holder[key].

		var i,          // The loop counter.
            k,          // The member key.
            v,          // The member value.
            length,
            mind = gap,
            partial,
            value = holder[key];

		// If the value has a toJSON method, call it to obtain a replacement value.

		if (value && typeof value === 'object' &&
                typeof value.toJSON === 'function') {
			value = value.toJSON(key);
		}

		// If we were called with a replacer function, then call the replacer to
		// obtain a replacement value.

		if (typeof rep === 'function') {
			value = rep.call(holder, key, value);
		}

		// What happens next depends on the value's type.

		switch (typeof value) {
			case 'string':
				return quote(value);

			case 'number':

				// JSON numbers must be finite. Encode non-finite numbers as null.

				return isFinite(value) ? String(value) : 'null';

			case 'boolean':
			case 'null':

				// If the value is a boolean or null, convert it to a string. Note:
				// typeof null does not produce 'null'. The case is included here in
				// the remote chance that this gets fixed someday.

				return String(value);

				// If the type is 'object', we might be dealing with an object or an array or
				// null.

			case 'object':

				// Due to a specification blunder in ECMAScript, typeof null is 'object',
				// so watch out for that case.

				if (!value) {
					return 'null';
				}

				// Make an array to hold the partial results of stringifying this object value.

				gap += indent;
				partial = [];

				// Is the value an array?

				if (Object.prototype.toString.apply(value) === '[object Array]') {

					// The value is an array. Stringify every element. Use null as a placeholder
					// for non-JSON values.

					length = value.length;
					for (i = 0; i < length; i += 1) {
						partial[i] = str(i, value) || 'null';
					}

					// Join all of the elements together, separated with commas, and wrap them in
					// brackets.

					v = partial.length === 0
                    ? '[]'
                    : gap
                    ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
                    : '[' + partial.join(',') + ']';
					gap = mind;
					return v;
				}

				// If the replacer is an array, use it to select the members to be stringified.

				if (rep && typeof rep === 'object') {
					length = rep.length;
					for (i = 0; i < length; i += 1) {
						if (typeof rep[i] === 'string') {
							k = rep[i];
							v = str(k, value);
							if (v) {
								partial.push(quote(k) + (gap ? ': ' : ':') + v);
							}
						}
					}
				} else {

					// Otherwise, iterate through all of the keys in the object.

					for (k in value) {
						if (Object.prototype.hasOwnProperty.call(value, k)) {
							v = str(k, value);
							if (v) {
								partial.push(quote(k) + (gap ? ': ' : ':') + v);
							}
						}
					}
				}

				// Join all of the member texts together, separated with commas,
				// and wrap them in braces.

				v = partial.length === 0
                ? '{}'
                : gap
                ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
                : '{' + partial.join(',') + '}';
				gap = mind;
				return v;
		}
	}

	// If the JSON object does not yet have a stringify method, give it one.

	if (typeof JSON.stringify !== 'function') {
		JSON.stringify = function (value, replacer, space) {

			// The stringify method takes a value and an optional replacer, and an optional
			// space parameter, and returns a JSON text. The replacer can be a function
			// that can replace values, or an array of strings that will select the keys.
			// A default replacer method can be provided. Use of the space parameter can
			// produce text that is more easily readable.

			var i;
			gap = '';
			indent = '';

			// If the space parameter is a number, make an indent string containing that
			// many spaces.

			if (typeof space === 'number') {
				for (i = 0; i < space; i += 1) {
					indent += ' ';
				}

				// If the space parameter is a string, it will be used as the indent string.

			} else if (typeof space === 'string') {
				indent = space;
			}

			// If there is a replacer, it must be a function or an array.
			// Otherwise, throw an error.

			rep = replacer;
			if (replacer && typeof replacer !== 'function' &&
                    (typeof replacer !== 'object' ||
                    typeof replacer.length !== 'number')) {
				throw new Error('JSON.stringify');
			}

			// Make a fake root object containing our value under the key of ''.
			// Return the result of stringifying the value.

			return str('', { '': value });
		};
	}


	// If the JSON object does not yet have a parse method, give it one.

	if (typeof JSON.parse !== 'function') {
		JSON.parse = function (text, reviver) {

			// The parse method takes a text and an optional reviver function, and returns
			// a JavaScript value if the text is a valid JSON text.

			var j;

			function walk(holder, key) {

				// The walk method is used to recursively walk the resulting structure so
				// that modifications can be made.

				var k, v, value = holder[key];
				if (value && typeof value === 'object') {
					for (k in value) {
						if (Object.prototype.hasOwnProperty.call(value, k)) {
							v = walk(value, k);
							if (v !== undefined) {
								value[k] = v;
							} else {
								delete value[k];
							}
						}
					}
				}
				return reviver.call(holder, key, value);
			}


			// Parsing happens in four stages. In the first stage, we replace certain
			// Unicode characters with escape sequences. JavaScript handles many characters
			// incorrectly, either silently deleting them, or treating them as line endings.

			text = String(text);
			cx.lastIndex = 0;
			if (cx.test(text)) {
				text = text.replace(cx, function (a) {
					return '\\u' +
                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
				});
			}

			// In the second stage, we run the text against regular expressions that look
			// for non-JSON patterns. We are especially concerned with '()' and 'new'
			// because they can cause invocation, and '=' because it can cause mutation.
			// But just to be safe, we want to reject all unexpected forms.

			// We split the second stage into 4 regexp operations in order to work around
			// crippling inefficiencies in IE's and Safari's regexp engines. First we
			// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
			// replace all simple value tokens with ']' characters. Third, we delete all
			// open brackets that follow a colon or comma or that begin the text. Finally,
			// we look to see that the remaining characters are only whitespace or ']' or
			// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

			if (/^[\],:{}\s]*$/
                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

				// In the third stage we use the eval function to compile the text into a
				// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
				// in JavaScript: it can begin a block or an object literal. We wrap the text
				// in parens to eliminate the ambiguity.

				j = eval('(' + text + ')');

				// In the optional fourth stage, we recursively walk the new structure, passing
				// each name/value pair to a reviver function for possible transformation.

				return typeof reviver === 'function'
                    ? walk({ '': j }, '')
                    : j;
			}

			// If the text is not JSON parseable, then a SyntaxError is thrown.

			throw new SyntaxError('JSON.parse');
		};
	}
} ());