Function serialize

test/json3.js:433–520

(property, object, callback, properties, whitespace, indentation, stack)

          // Internal: Recursively serializes an object. Implements the
          // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
          var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
            var value, type, className, results, element, index, length, prefix, result;
            attempt(function () {
              // Necessary for host object support.
              value = object[property];
            });
            if (typeof value == "object" && value) {
              if (value.getUTCFullYear && getClass.call(value) == dateClass && value.toJSON === Date.prototype.toJSON) {
                value = serializeDate(value);
              } else if (typeof value.toJSON == "function") {
                value = value.toJSON(property);
              }
            }
            if (callback) {
              // If a replacement function was provided, call it to obtain the value
              // for serialization.
              value = callback.call(object, property, value);
            }
            // Exit early if value is `undefined` or `null`.
            if (value == undefined) {
              return value === undefined ? value : "null";
            }
            type = typeof value;
            // Only call `getClass` if the value is an object.
            if (type == "object") {
              className = getClass.call(value);
            }
            switch (className || type) {
              case "boolean":
              case booleanClass:
                // Booleans are represented literally.
                return "" + value;
              case "number":
              case numberClass:
                // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
                // `"null"`.
                return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
              case "string":
              case stringClass:
                // Strings are double-quoted and escaped.
                return quote("" + value);
            }
            // Recursively serialize objects and arrays.
            if (typeof value == "object") {
              // Check for cyclic structures. This is a linear search; performance
              // is inversely proportional to the number of unique nested objects.
              for (length = stack.length; length--;) {
                if (stack[length] === value) {
                  // Cyclic structures cannot be serialized by `JSON.stringify`.
                  throw TypeError();
                }
              }
              // Add the object to the stack of traversed objects.
              stack.push(value);
              results = [];
              // Save the current indentation level and indent one additional level.
              prefix = indentation;
              indentation += whitespace;