includes/clientside/static/json.js
author Dan Fuhry <dan@enanocms.org>
Tue, 16 Nov 2010 12:33:42 -0500
changeset 1318 a736fcf3d2fd
parent 1227 bdac73ed481e
permissions -rw-r--r--
Tagged release: 1.1.7pl2

/*
		json.js
		2007-03-20

		All of the code contained within this file is released into
		the public domain. Optionally, you may distribute this code
		under the terms of the GNU General Public License as well
		(public domain licensing allows this).
		
*/

function toJSONString(input)
{
	if ( window.JSON )
	{
		return window.JSON.stringify(input);
	}
	var m = {
					'\b': '\\b',
					'\t': '\\t',
					'\n': '\\n',
					'\f': '\\f',
					'\r': '\\r',
					'"' : '\\"',
					'\\': '\\\\'
					};
	var t = typeof(input);
	switch(t)
	{
		case 'string':
			if (/["\\\x00-\x1f]/.test(input))
			{
					return '"' + input.replace(/([\x00-\x1f\\"])/g, function(a, b)
						{
							var c = m[b];
							if (c) {
									return c;
							}
							c = b.charCodeAt();
							return '\\u00' +
									Math.floor(c / 16).toString(16) +
									(c % 16).toString(16);
					}) + '"';
			}
			return '"' + input + '"';
			break;
		case 'array':
			var a = ['['],  
						b,          
						i,          
						l = input.length,
						v;          

				var p = function (s) {

						if (b) {
								a.push(',');
						}
						a.push(s);
						b = true;
				}

				for (i = 0; i < l; i += 1) {
						v = input[i];
						switch (typeof v) {
						case 'object':
							if (v) {
								p(toJSONString(v));
							} else {
								p("null");
							}
							break;
						case 'array':
						case 'string':
						case 'number':
						case 'boolean':
								p(toJSONString(v));
						}
				}

				a.push(']');
				return a.join('');
			break;
		case 'date':
			var f = function (n)
			{
				return n < 10 ? '0' + n : n;
			}
			return '"' + input.getFullYear() + '-' +
 								f(input.getMonth() + 1) + '-' +
 								f(input.getDate()) + 'T' +
 								f(input.getHours()) + ':' +
 								f(input.getMinutes()) + ':' +
 								f(input.getSeconds()) + '"';
 								
		case 'boolean':
			return String(input);
			break;
		case 'number':
			return isFinite(input) ? String(input) : "null";
			break;
		case 'object':
			var a = ['{'],  
					b,          
					k,          
					v;          

			var p = function (s)
			{
				if (b)
				{
					a.push(',');
				}
				a.push(toJSONString(k), ':', s);
				b = true;
			}

			for (k in input) 
			{
				if (input.hasOwnProperty(k))
				{
					v = input[k];
					switch (typeof v) {

						case 'object':
							if (v) {
								p(toJSONString(v));
							} else {
								p("null");
							}
							break;
						case 'string':
						case 'number':
						case 'boolean':
							p(toJSONString(v));
							break;
					}
				}
			}

			a.push('}');
			return a.join('');
			break;
	}
}

function parseJSON(string, filter)
{
	if ( window.JSON )
	{
		return window.JSON.parse(string);
	}
	
	try {
		if (/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/.
						test(string))
		{
	
				var j = eval('(' + string + ')');
				if (typeof filter === 'function') {
	
						function walk(k, v)
						{
								if (v && typeof v === 'object') {
										for (var i in v) {
												if (v.hasOwnProperty(i)) {
														v[i] = walk(i, v[i]);
												}
										}
								}
								return filter(k, v);
						}
	
						j = walk('', j);
				}
				return j;
		}
	} catch (e) {
	
	}
	throw new SyntaxError("parseJSON");
}