add Ox.fallback.JSON

source/Ox/js/Fallback.js

@@ -136,6 +136,66 @@ Ox.fallback.isArray = function(value) {
     return Object.prototype.toString.call(value) == '[object Array]';
 };
 
+/*@
+Ox.fallback.JSON <o> see https://github.com/douglascrockford/JSON-js
+    > Ox.fallback.JSON.parse('{"a": [1, 2], "b": [3, 4]}')
+    {a: [1, 2], b: [3, 4]}
+    > Ox.fallback.JSON.stringify([(function(){ return arguments; }()), false, null, 0, Infinity, NaN, / /, void 0])
+    '[{},false,null,0,null,null,{},null]'
+@*/
+Ox.fallback.JSON = (function() {
+    var replace = {
+        '"': '\\"',
+        '\b': '\\b',
+        '\f': '\\f',
+        '\n': '\\n',
+        '\r': '\\r',
+        '\t': '\\t',
+        '\\': '\\\\'
+    };
+    function quote(value) {
+        return '"' + value.split('').map(function(char) {
+            return replace[char] || char;
+        }).join('') + '"';
+    };
+    return {
+        parse: function parse(string) {
+            try {
+                return eval('(' + string + ')');
+            } catch (e) {
+                throw new SyntaxError();
+            }
+        },
+        stringify: function stringify(value) {
+            var ret = 'null', type = Ox.typeOf(value);
+            if (type == 'arguments' || type == 'regexp') {
+                ret = '{}';
+            } else if (type == 'array') {
+                ret = ['[', ']'].join(
+                    value.map(function(v) {
+                        return stringify(v);
+                    }).join(',')
+                );
+            } else if (type == 'boolean') {
+                ret = String(value);
+            } else if (type == 'date') {
+                ret = Ox.getISODate(value);
+            } else if (type == 'number') {
+                ret = isFinite(value) ? String(value) : 'null';
+            } else if (type == 'object') {
+                ret = ['{', '}'].join(
+                    value.map(function(v, k) {
+                        return quote(k) + ': ' + stringify(v);
+                    }).join(',')
+                );
+            } else if (type == 'string') {
+                ret = quote(value)
+            }
+            return ret;
+        }
+    };
+}());
+
 /*@
 Ox.fallback.keys <f> see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/keys
     > Ox.fallback.keys({a: 1, b: 2, c: 3})
@@ -275,15 +335,16 @@ Ox.fallback.trim = function() {
 };
 
 (function(global) {
-    var log, method, object;
-    for (method in Ox.fallback) {
-        object = method == 'bind' ? Function.prototype
-            : method == 'isArray' ? Array
-            : method == 'keys' ? Object
-            : method == 'trim' ? String.prototype
+    var key, log, object;
+    for (key in Ox.fallback) {
+        object = key == 'bind' ? Function.prototype
+            : key == 'isArray' ? Array
+            : key == 'JSON' ? global
+            : key == 'keys' ? Object
+            : key == 'trim' ? String.prototype
             : Array.prototype;
-        if (!object[method]) {
-            object[method] = Ox.fallback[method];
+        if (!object[key]) {
+            object[key] = Ox.fallback[key];
         }
     }
     // In IE8, window.console.log is an object,